Drezil/imgui
1
0
Fork 0
mirror of https://github.com/Drezil/imgui.git synced 2024-12-17 21:56:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'origin' into 2015-03-antialiased-primitives

Browse Source
This commit is contained in:
ocornut 2015-03-09 18:06:39 +00:00
commit 378eee490b
28 changed files with 2099 additions and 1554 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
examples/README.txt
View File

@ -1,16 +1,18 @@
directx9_example/
DirectX9 example application (Windows).
directx11_example/
DirectX11 example (Windows).
opengl_example/
OpenGL exemple, using fixed pipeline (Windows/OSX/Linux etc., using glfw+glew)
OpenGL example, using GLFW + fixed pipeline.
This is simple and should work for all OpenGL enabled applications.
Prefer following this example since it is the shortest one!
opengl3_example/
OpenGL exemple, using programmable pipeline (Windows/OSX/Linux etc., using glfw+glew)
OpenGL exemple, using GLFW/GL3W + programmable pipeline.
This uses more modern calls and custom shaders.
I don't think there is an advantage using this over the "simpler example, but it is provided for information.
I don't think there is an advantage using this over the simpler example, but it is provided for reference.
directx9_example/
DirectX9 example, Windows only.
directx11_example/
DirectX11 example, Windows only.
This is quite long and tedious, because: DirectX11.

6
examples/directx11_example/directx11_example.vcxproj
View File

@ -48,7 +48,7 @@
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<AdditionalIncludeDirectories>$(DXSDK_DIR)/Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>..\..;$(DXSDK_DIR)/Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -63,7 +63,7 @@
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<AdditionalIncludeDirectories>$(DXSDK_DIR)/Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>..\..;$(DXSDK_DIR)/Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -77,9 +77,11 @@
<ItemGroup>
<ClInclude Include="..\..\imconfig.h" />
<ClInclude Include="..\..\imgui.h" />
<ClInclude Include="imgui_impl_dx11.h" />
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\imgui.cpp" />
<ClCompile Include="imgui_impl_dx11.cpp" />
<ClCompile Include="main.cpp" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />

6
examples/directx11_example/directx11_example.vcxproj.filters
View File

@ -15,6 +15,9 @@
<ClInclude Include="..\..\imgui.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="imgui_impl_dx11.h">
<Filter>sources</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\imgui.cpp">
@ -23,5 +26,8 @@
<ClCompile Include="main.cpp">
<Filter>sources</Filter>
</ClCompile>
<ClCompile Include="imgui_impl_dx11.cpp">
<Filter>sources</Filter>
</ClCompile>
</ItemGroup>
</Project>

465
examples/directx11_example/imgui_impl_dx11.cpp Normal file
View File

@ -0,0 +1,465 @@
// ImGui Win32 + DirectX11 binding
// https://github.com/ocornut/imgui
#include <imgui.h>
#include "imgui_impl_dx11.h"
// DirectX
#include <d3d11.h>
#include <d3dcompiler.h>
#define DIRECTINPUT_VERSION 0x0800
#include <dinput.h>
// Data
static INT64 g_Time = 0;
static INT64 g_TicksPerSecond = 0;
static HWND g_hWnd = 0;
static ID3D11Device* g_pd3dDevice = NULL;
static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
static ID3D11Buffer* g_pVB = NULL;
static ID3D10Blob * g_pVertexShaderBlob = NULL;
static ID3D11VertexShader* g_pVertexShader = NULL;
static ID3D11InputLayout* g_pInputLayout = NULL;
static ID3D11Buffer* g_pVertexConstantBuffer = NULL;
static ID3D10Blob * g_pPixelShaderBlob = NULL;
static ID3D11PixelShader* g_pPixelShader = NULL;
static ID3D11SamplerState* g_pFontSampler = NULL;
static ID3D11ShaderResourceView*g_pFontTextureView = NULL;
static ID3D11BlendState* g_blendState = NULL;
struct CUSTOMVERTEX
{
float pos[2];
float uv[2];
unsigned int col;
};
struct VERTEX_CONSTANT_BUFFER
{
float mvp[4][4];
};
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImGui_ImplDX11_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
{
// Copy and convert all vertices into a single contiguous buffer
D3D11_MAPPED_SUBRESOURCE mappedResource;
if (g_pd3dDeviceContext->Map(g_pVB, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource) != S_OK)
return;
CUSTOMVERTEX* vtx_dst = (CUSTOMVERTEX*)mappedResource.pData;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
const ImDrawVert* vtx_src = &cmd_list->vtx_buffer[0];
for (size_t i = 0; i < cmd_list->vtx_buffer.size(); i++)
{
vtx_dst->pos[0] = vtx_src->pos.x;
vtx_dst->pos[1] = vtx_src->pos.y;
vtx_dst->uv[0] = vtx_src->uv.x;
vtx_dst->uv[1] = vtx_src->uv.y;
vtx_dst->col = vtx_src->col;
vtx_dst++;
vtx_src++;
}
}
g_pd3dDeviceContext->Unmap(g_pVB, 0);
// Setup orthographic projection matrix into our constant buffer
{
D3D11_MAPPED_SUBRESOURCE mappedResource;
if (g_pd3dDeviceContext->Map(g_pVertexConstantBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource) != S_OK)
return;
VERTEX_CONSTANT_BUFFER* pConstantBuffer = (VERTEX_CONSTANT_BUFFER*)mappedResource.pData;
const float L = 0.0f;
const float R = ImGui::GetIO().DisplaySize.x;
const float B = ImGui::GetIO().DisplaySize.y;
const float T = 0.0f;
const float mvp[4][4] =
{
{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f},
{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f,},
{ 0.0f, 0.0f, 0.5f, 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f },
};
memcpy(&pConstantBuffer->mvp, mvp, sizeof(mvp));
g_pd3dDeviceContext->Unmap(g_pVertexConstantBuffer, 0);
}
// Setup viewport
{
D3D11_VIEWPORT vp;
memset(&vp, 0, sizeof(D3D11_VIEWPORT));
vp.Width = ImGui::GetIO().DisplaySize.x;
vp.Height = ImGui::GetIO().DisplaySize.y;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
g_pd3dDeviceContext->RSSetViewports(1, &vp);
}
// Bind shader and vertex buffers
unsigned int stride = sizeof(CUSTOMVERTEX);
unsigned int offset = 0;
g_pd3dDeviceContext->IASetInputLayout(g_pInputLayout);
g_pd3dDeviceContext->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
g_pd3dDeviceContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
g_pd3dDeviceContext->VSSetShader(g_pVertexShader, NULL, 0);
g_pd3dDeviceContext->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
g_pd3dDeviceContext->PSSetShader(g_pPixelShader, NULL, 0);
g_pd3dDeviceContext->PSSetSamplers(0, 1, &g_pFontSampler);
// Setup render state
const float blendFactor[4] = { 0.f, 0.f, 0.f, 0.f };
g_pd3dDeviceContext->OMSetBlendState(g_blendState, blendFactor, 0xffffffff);
// Render command lists
int vtx_offset = 0;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
if (pcmd->user_callback)
{
pcmd->user_callback(cmd_list, pcmd);
}
else
{
const D3D11_RECT r = { (LONG)pcmd->clip_rect.x, (LONG)pcmd->clip_rect.y, (LONG)pcmd->clip_rect.z, (LONG)pcmd->clip_rect.w };
g_pd3dDeviceContext->PSSetShaderResources(0, 1, (ID3D11ShaderResourceView**)&pcmd->texture_id);
g_pd3dDeviceContext->RSSetScissorRects(1, &r);
g_pd3dDeviceContext->Draw(pcmd->vtx_count, vtx_offset);
}
vtx_offset += pcmd->vtx_count;
}
}
// Restore modified state
g_pd3dDeviceContext->IASetInputLayout(NULL);
g_pd3dDeviceContext->PSSetShader(NULL, NULL, 0);
g_pd3dDeviceContext->VSSetShader(NULL, NULL, 0);
}
LRESULT ImGui_ImplDX11_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
ImGuiIO& io = ImGui::GetIO();
switch (msg)
{
case WM_LBUTTONDOWN:
io.MouseDown[0] = true;
return true;
case WM_LBUTTONUP:
io.MouseDown[0] = false;
return true;
case WM_RBUTTONDOWN:
io.MouseDown[1] = true;
return true;
case WM_RBUTTONUP:
io.MouseDown[1] = false;
return true;
case WM_MOUSEWHEEL:
io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
return true;
case WM_MOUSEMOVE:
io.MousePos.x = (signed short)(lParam);
io.MousePos.y = (signed short)(lParam >> 16);
return true;
case WM_KEYDOWN:
if (wParam >= 0 && wParam < 256)
io.KeysDown[wParam] = 1;
return true;
case WM_KEYUP:
if (wParam >= 0 && wParam < 256)
io.KeysDown[wParam] = 0;
return true;
case WM_CHAR:
// You can also use ToAscii()+GetKeyboardState() to retrieve characters.
if (wParam > 0 && wParam < 0x10000)
io.AddInputCharacter((unsigned short)wParam);
return true;
}
return 0;
}
static void ImGui_ImplDX11_CreateFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
// Build
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
// Create DX11 texture
{
D3D11_TEXTURE2D_DESC texDesc;
ZeroMemory(&texDesc, sizeof(texDesc));
texDesc.Width = width;
texDesc.Height = height;
texDesc.MipLevels = 1;
texDesc.ArraySize = 1;
texDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
texDesc.SampleDesc.Count = 1;
texDesc.Usage = D3D11_USAGE_DEFAULT;
texDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
texDesc.CPUAccessFlags = 0;
ID3D11Texture2D *pTexture = NULL;
D3D11_SUBRESOURCE_DATA subResource;
subResource.pSysMem = pixels;
subResource.SysMemPitch = texDesc.Width * 4;
subResource.SysMemSlicePitch = 0;
g_pd3dDevice->CreateTexture2D(&texDesc, &subResource, &pTexture);
// Create texture view
D3D11_SHADER_RESOURCE_VIEW_DESC srvDesc;
ZeroMemory(&srvDesc, sizeof(srvDesc));
srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
srvDesc.Texture2D.MipLevels = texDesc.MipLevels;
srvDesc.Texture2D.MostDetailedMip = 0;
g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &g_pFontTextureView);
pTexture->Release();
}
// Store our identifier
io.Fonts->TexID = (void *)g_pFontTextureView;
// Create texture sampler
{
D3D11_SAMPLER_DESC samplerDesc;
ZeroMemory(&samplerDesc, sizeof(samplerDesc));
samplerDesc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
samplerDesc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
samplerDesc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
samplerDesc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
samplerDesc.MipLODBias = 0.f;
samplerDesc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
samplerDesc.MinLOD = 0.f;
samplerDesc.MaxLOD = 0.f;
g_pd3dDevice->CreateSamplerState(&samplerDesc, &g_pFontSampler);
}
}
bool ImGui_ImplDX11_CreateDeviceObjects()
{
if (!g_pd3dDevice)
return false;
if (g_pVB)
ImGui_ImplDX11_InvalidateDeviceObjects();
// Create the vertex shader
{
static const char* vertexShader =
"cbuffer vertexBuffer : register(c0) \
{\
float4x4 ProjectionMatrix; \
};\
struct VS_INPUT\
{\
float2 pos : POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
PS_INPUT main(VS_INPUT input)\
{\
PS_INPUT output;\
output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
output.col = input.col;\
output.uv = input.uv;\
return output;\
}";
D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_5_0", 0, 0, &g_pVertexShaderBlob, NULL);
if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
return false;
if (g_pd3dDevice->CreateVertexShader((DWORD*)g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), NULL, &g_pVertexShader) != S_OK)
return false;
// Create the input layout
D3D11_INPUT_ELEMENT_DESC localLayout[] = {
{ "POSITION", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, (size_t)(&((CUSTOMVERTEX*)0)->pos), D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (size_t)(&((CUSTOMVERTEX*)0)->col), D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, (size_t)(&((CUSTOMVERTEX*)0)->uv), D3D11_INPUT_PER_VERTEX_DATA, 0 },
};
if (g_pd3dDevice->CreateInputLayout(localLayout, 3, g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pInputLayout) != S_OK)
return false;
// Create the constant buffer
{
D3D11_BUFFER_DESC cbDesc;
cbDesc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER);
cbDesc.Usage = D3D11_USAGE_DYNAMIC;
cbDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
cbDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
cbDesc.MiscFlags = 0;
g_pd3dDevice->CreateBuffer(&cbDesc, NULL, &g_pVertexConstantBuffer);
}
}
// Create the pixel shader
{
static const char* pixelShader =
"struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
sampler sampler0;\
Texture2D texture0;\
\
float4 main(PS_INPUT input) : SV_Target\
{\
float4 out_col = input.col * texture0.Sample(sampler0, input.uv); \
return out_col; \
}";
D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_5_0", 0, 0, &g_pPixelShaderBlob, NULL);
if (g_pPixelShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
return false;
if (g_pd3dDevice->CreatePixelShader((DWORD*)g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize(), NULL, &g_pPixelShader) != S_OK)
return false;
}
// Create the blending setup
{
D3D11_BLEND_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.AlphaToCoverageEnable = false;
desc.RenderTarget[0].BlendEnable = true;
desc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
desc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA;
desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
g_pd3dDevice->CreateBlendState(&desc, &g_blendState);
}
// Create the vertex buffer
{
D3D11_BUFFER_DESC bufferDesc;
memset(&bufferDesc, 0, sizeof(D3D11_BUFFER_DESC));
bufferDesc.Usage = D3D11_USAGE_DYNAMIC;
bufferDesc.ByteWidth = 100000 * sizeof(CUSTOMVERTEX); // Maybe we should handle that more dynamically?
bufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
bufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
bufferDesc.MiscFlags = 0;
if (g_pd3dDevice->CreateBuffer(&bufferDesc, NULL, &g_pVB) < 0)
return false;
}
ImGui_ImplDX11_CreateFontsTexture();
return true;
}
void ImGui_ImplDX11_InvalidateDeviceObjects()
{
if (!g_pd3dDevice)
return;
if (g_pFontSampler) { g_pFontSampler->Release(); g_pFontSampler = NULL; }
if (g_pFontTextureView) { g_pFontTextureView->Release(); ImGui::GetIO().Fonts->TexID = 0; }
if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
if (g_blendState) { g_blendState->Release(); g_blendState = NULL; }
if (g_pPixelShader) { g_pPixelShader->Release(); g_pPixelShader = NULL; }
if (g_pPixelShaderBlob) { g_pPixelShaderBlob->Release(); g_pPixelShaderBlob = NULL; }
if (g_pVertexConstantBuffer) { g_pVertexConstantBuffer->Release(); g_pVertexConstantBuffer = NULL; }
if (g_pInputLayout) { g_pInputLayout->Release(); g_pInputLayout = NULL; }
if (g_pVertexShader) { g_pVertexShader->Release(); g_pVertexShader = NULL; }
if (g_pVertexShaderBlob) { g_pVertexShaderBlob->Release(); g_pVertexShaderBlob = NULL; }
}
bool ImGui_ImplDX11_Init(void* hwnd, ID3D11Device* device, ID3D11DeviceContext* device_context)
{
g_hWnd = (HWND)hwnd;
g_pd3dDevice = device;
g_pd3dDeviceContext = device_context;
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond))
return false;
if (!QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
return false;
ImGuiIO& io = ImGui::GetIO();
io.KeyMap[ImGuiKey_Tab] = VK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array that we will update during the application lifetime.
io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
io.KeyMap[ImGuiKey_DownArrow] = VK_UP;
io.KeyMap[ImGuiKey_Home] = VK_HOME;
io.KeyMap[ImGuiKey_End] = VK_END;
io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
io.KeyMap[ImGuiKey_A] = 'A';
io.KeyMap[ImGuiKey_C] = 'C';
io.KeyMap[ImGuiKey_V] = 'V';
io.KeyMap[ImGuiKey_X] = 'X';
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImGui_ImplDX11_RenderDrawLists;
io.ImeWindowHandle = g_hWnd;
return true;
}
void ImGui_ImplDX11_Shutdown()
{
ImGui_ImplDX11_InvalidateDeviceObjects();
ImGui::Shutdown();
g_pd3dDevice = NULL;
g_pd3dDeviceContext = NULL;
g_hWnd = (HWND)0;
}
void ImGui_ImplDX11_NewFrame()
{
if (!g_pVB)
ImGui_ImplDX11_CreateDeviceObjects();
ImGuiIO& io = ImGui::GetIO();
// Setup display size (every frame to accommodate for window resizing)
RECT rect;
GetClientRect(g_hWnd, &rect);
io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
// Setup time step
INT64 current_time;
QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
io.DeltaTime = (float)(current_time - g_Time) / g_TicksPerSecond;
g_Time = current_time;
// Read keyboard modifiers inputs
io.KeyCtrl = (GetKeyState(VK_CONTROL) & 0x8000) != 0;
io.KeyShift = (GetKeyState(VK_SHIFT) & 0x8000) != 0;
// io.KeysDown : filled by WM_KEYDOWN/WM_KEYUP events
// io.MousePos : filled by WM_MOUSEMOVE events
// io.MouseDown : filled by WM_*BUTTON* events
// io.MouseWheel : filled by WM_MOUSEWHEEL events
// Start the frame
ImGui::NewFrame();
}

20
examples/directx11_example/imgui_impl_dx11.h Normal file
View File

@ -0,0 +1,20 @@
// ImGui Win32 + DirectX11 binding
// https://github.com/ocornut/imgui
struct ID3D11Device;
struct ID3D11DeviceContext;
bool ImGui_ImplDX11_Init(void* hwnd, ID3D11Device* device, ID3D11DeviceContext* device_context);
void ImGui_ImplDX11_Shutdown();
void ImGui_ImplDX11_NewFrame();
// Use if you want to reset your rendering device without losing ImGui state.
void ImGui_ImplDX11_InvalidateDeviceObjects();
bool ImGui_ImplDX11_CreateDeviceObjects();
// Handler for Win32 messages, update mouse/keyboard data.
// You may or not need this for your implementation, but it can serve as reference for handling inputs.
// Commented out to avoid dragging dependencies on <windows.h> types. You can copy the extern declaration in your code.
/*
extern LRESULT ImGui_ImplDX11_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
*/

539
examples/directx11_example/main.cpp
View File

@ -1,149 +1,41 @@
// ImGui - standalone example application for DirectX 11
#include <windows.h>
#include "../../imgui.h"
// DirectX 11
#include <imgui.h>
#include "imgui_impl_dx11.h"
#include <d3d11.h>
#include <d3dcompiler.h>
#define DIRECTINPUT_VERSION 0x0800
#include <dinput.h>
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strdup
static HWND hWnd;
// Data
static ID3D11Device* g_pd3dDevice = NULL;
static ID3D11DeviceContext* g_pd3dDeviceImmediateContext = NULL;
static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
static IDXGISwapChain* g_pSwapChain = NULL;
static ID3D11Buffer* g_pVB = NULL;
static ID3D11RenderTargetView* g_mainRenderTargetView;
static ID3D11RenderTargetView* g_mainRenderTargetView = NULL;
static ID3D10Blob * g_pVertexShaderBlob = NULL;
static ID3D11VertexShader* g_pVertexShader = NULL;
static ID3D11InputLayout* g_pInputLayout = NULL;
static ID3D11Buffer* g_pVertexConstantBuffer = NULL;
static ID3D10Blob * g_pPixelShaderBlob = NULL;
static ID3D11PixelShader* g_pPixelShader = NULL;
static ID3D11SamplerState* g_pFontSampler = NULL;
static ID3D11BlendState* g_blendState = NULL;
struct CUSTOMVERTEX
void CreateRenderTarget()
{
float pos[2];
float uv[2];
unsigned int col;
};
DXGI_SWAP_CHAIN_DESC sd;
g_pSwapChain->GetDesc(&sd);
struct VERTEX_CONSTANT_BUFFER
{
float mvp[4][4];
};
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
{
// Copy and convert all vertices into a single contiguous buffer
D3D11_MAPPED_SUBRESOURCE mappedResource;
if (g_pd3dDeviceImmediateContext->Map(g_pVB, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource) != S_OK)
return;
CUSTOMVERTEX* vtx_dst = (CUSTOMVERTEX*)mappedResource.pData;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
const ImDrawVert* vtx_src = &cmd_list->vtx_buffer[0];
for (size_t i = 0; i < cmd_list->vtx_buffer.size(); i++)
{
vtx_dst->pos[0] = vtx_src->pos.x;
vtx_dst->pos[1] = vtx_src->pos.y;
vtx_dst->uv[0] = vtx_src->uv.x;
vtx_dst->uv[1] = vtx_src->uv.y;
vtx_dst->col = vtx_src->col;
vtx_dst++;
vtx_src++;
}
}
g_pd3dDeviceImmediateContext->Unmap(g_pVB, 0);
// Setup orthographic projection matrix into our constant buffer
{
D3D11_MAPPED_SUBRESOURCE mappedResource;
if (g_pd3dDeviceImmediateContext->Map(g_pVertexConstantBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource) != S_OK)
return;
VERTEX_CONSTANT_BUFFER* pConstantBuffer = (VERTEX_CONSTANT_BUFFER*)mappedResource.pData;
const float L = 0.0f;
const float R = ImGui::GetIO().DisplaySize.x;
const float B = ImGui::GetIO().DisplaySize.y;
const float T = 0.0f;
const float mvp[4][4] =
{
{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f},
{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f,},
{ 0.0f, 0.0f, 0.5f, 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f },
};
memcpy(&pConstantBuffer->mvp, mvp, sizeof(mvp));
g_pd3dDeviceImmediateContext->Unmap(g_pVertexConstantBuffer, 0);
}
// Setup viewport
{
D3D11_VIEWPORT vp;
memset(&vp, 0, sizeof(D3D11_VIEWPORT));
vp.Width = ImGui::GetIO().DisplaySize.x;
vp.Height = ImGui::GetIO().DisplaySize.y;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
g_pd3dDeviceImmediateContext->RSSetViewports(1, &vp);
}
// Bind shader and vertex buffers
unsigned int stride = sizeof(CUSTOMVERTEX);
unsigned int offset = 0;
g_pd3dDeviceImmediateContext->IASetInputLayout(g_pInputLayout);
g_pd3dDeviceImmediateContext->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
g_pd3dDeviceImmediateContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
g_pd3dDeviceImmediateContext->VSSetShader(g_pVertexShader, NULL, 0);
g_pd3dDeviceImmediateContext->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
g_pd3dDeviceImmediateContext->PSSetShader(g_pPixelShader, NULL, 0);
g_pd3dDeviceImmediateContext->PSSetSamplers(0, 1, &g_pFontSampler);
// Setup render state
const float blendFactor[4] = { 0.f, 0.f, 0.f, 0.f };
g_pd3dDeviceImmediateContext->OMSetBlendState(g_blendState, blendFactor, 0xffffffff);
// Render command lists
int vtx_offset = 0;
for (int n = 0; n < cmd_lists_count; n++)
{
// Render command list
const ImDrawList* cmd_list = cmd_lists[n];
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
const D3D11_RECT r = { (LONG)pcmd->clip_rect.x, (LONG)pcmd->clip_rect.y, (LONG)pcmd->clip_rect.z, (LONG)pcmd->clip_rect.w };
g_pd3dDeviceImmediateContext->PSSetShaderResources(0, 1, (ID3D11ShaderResourceView**)&pcmd->texture_id);
g_pd3dDeviceImmediateContext->RSSetScissorRects(1, &r);
g_pd3dDeviceImmediateContext->Draw(pcmd->vtx_count, vtx_offset);
vtx_offset += pcmd->vtx_count;
}
}
// Restore modified state
g_pd3dDeviceImmediateContext->IASetInputLayout(NULL);
g_pd3dDeviceImmediateContext->PSSetShader(NULL, NULL, 0);
g_pd3dDeviceImmediateContext->VSSetShader(NULL, NULL, 0);
// Create the render target
ID3D11Texture2D* pBackBuffer;
D3D11_RENDER_TARGET_VIEW_DESC render_target_view_desc;
ZeroMemory(&render_target_view_desc, sizeof(render_target_view_desc));
render_target_view_desc.Format = sd.BufferDesc.Format;
render_target_view_desc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
g_pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
g_pd3dDevice->CreateRenderTargetView(pBackBuffer, &render_target_view_desc, &g_mainRenderTargetView);
g_pd3dDeviceContext->OMSetRenderTargets(1, &g_mainRenderTargetView, NULL);
pBackBuffer->Release();
}
HRESULT InitDeviceD3D(HWND hWnd)
void CleanupRenderTarget()
{
if (g_mainRenderTargetView) { g_mainRenderTargetView->Release(); g_mainRenderTargetView = NULL; }
}
HRESULT CreateDeviceD3D(HWND hWnd)
{
// Setup swap chain
DXGI_SWAP_CHAIN_DESC sd;
@ -170,7 +62,7 @@ HRESULT InitDeviceD3D(HWND hWnd)
#endif
D3D_FEATURE_LEVEL featureLevel;
const D3D_FEATURE_LEVEL featureLevelArray[1] = { D3D_FEATURE_LEVEL_11_0, };
if (D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, createDeviceFlags, featureLevelArray, 1, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceImmediateContext) != S_OK)
if (D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, createDeviceFlags, featureLevelArray, 1, D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &featureLevel, &g_pd3dDeviceContext) != S_OK)
return E_FAIL;
// Setup rasterizer
@ -190,369 +82,81 @@ HRESULT InitDeviceD3D(HWND hWnd)
ID3D11RasterizerState* pRState = NULL;
g_pd3dDevice->CreateRasterizerState(&RSDesc, &pRState);
g_pd3dDeviceImmediateContext->RSSetState(pRState);
g_pd3dDeviceContext->RSSetState(pRState);
pRState->Release();
}
// Create the render target
{
ID3D11Texture2D* pBackBuffer;
D3D11_RENDER_TARGET_VIEW_DESC render_target_view_desc;
ZeroMemory(&render_target_view_desc, sizeof(render_target_view_desc));
render_target_view_desc.Format = sd.BufferDesc.Format;
render_target_view_desc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
g_pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);
g_pd3dDevice->CreateRenderTargetView(pBackBuffer, &render_target_view_desc, &g_mainRenderTargetView);
g_pd3dDeviceImmediateContext->OMSetRenderTargets(1, &g_mainRenderTargetView, NULL);
pBackBuffer->Release();
}
// Create the vertex shader
{
static const char* vertexShader =
"cbuffer vertexBuffer : register(c0) \
{\
float4x4 ProjectionMatrix; \
};\
struct VS_INPUT\
{\
float2 pos : POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
PS_INPUT main(VS_INPUT input)\
{\
PS_INPUT output;\
output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
output.col = input.col;\
output.uv = input.uv;\
return output;\
}";
D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_5_0", 0, 0, &g_pVertexShaderBlob, NULL);
if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
return E_FAIL;
if (g_pd3dDevice->CreateVertexShader((DWORD*)g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), NULL, &g_pVertexShader) != S_OK)
return E_FAIL;
// Create the input layout
D3D11_INPUT_ELEMENT_DESC localLayout[] = {
{ "POSITION", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, (size_t)(&((CUSTOMVERTEX*)0)->pos), D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "COLOR", 0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (size_t)(&((CUSTOMVERTEX*)0)->col), D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, (size_t)(&((CUSTOMVERTEX*)0)->uv), D3D11_INPUT_PER_VERTEX_DATA, 0 },
};
if (g_pd3dDevice->CreateInputLayout(localLayout, 3, g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pInputLayout) != S_OK)
return E_FAIL;
// Create the constant buffer
{
D3D11_BUFFER_DESC cbDesc;
cbDesc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER);
cbDesc.Usage = D3D11_USAGE_DYNAMIC;
cbDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
cbDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
cbDesc.MiscFlags = 0;
g_pd3dDevice->CreateBuffer(&cbDesc, NULL, &g_pVertexConstantBuffer);
}
}
// Create the pixel shader
{
static const char* pixelShader =
"struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
sampler sampler0;\
Texture2D texture0;\
\
float4 main(PS_INPUT input) : SV_Target\
{\
float4 out_col = input.col * texture0.Sample(sampler0, input.uv); \
return out_col; \
}";
D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_5_0", 0, 0, &g_pPixelShaderBlob, NULL);
if (g_pPixelShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
return E_FAIL;
if (g_pd3dDevice->CreatePixelShader((DWORD*)g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize(), NULL, &g_pPixelShader) != S_OK)
return E_FAIL;
}
// Create the blending setup
{
D3D11_BLEND_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.AlphaToCoverageEnable = false;
desc.RenderTarget[0].BlendEnable = true;
desc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
desc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA;
desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
g_pd3dDevice->CreateBlendState(&desc, &g_blendState);
}
CreateRenderTarget();
return S_OK;
}
void CleanupDevice()
void CleanupDeviceD3D()
{
if (g_pd3dDeviceImmediateContext) g_pd3dDeviceImmediateContext->ClearState();
// InitImGui
if (g_pFontSampler) g_pFontSampler->Release();
if (ID3D11ShaderResourceView* font_texture_view = (ID3D11ShaderResourceView*)ImGui::GetIO().Fonts->TexID)
font_texture_view->Release();
if (g_pVB) g_pVB->Release();
// InitDeviceD3D
if (g_blendState) g_blendState->Release();
if (g_pPixelShader) g_pPixelShader->Release();
if (g_pPixelShaderBlob) g_pPixelShaderBlob->Release();
if (g_pVertexConstantBuffer) g_pVertexConstantBuffer->Release();
if (g_pInputLayout) g_pInputLayout->Release();
if (g_pVertexShader) g_pVertexShader->Release();
if (g_pVertexShaderBlob) g_pVertexShaderBlob->Release();
if (g_mainRenderTargetView) g_mainRenderTargetView->Release();
if (g_pSwapChain) g_pSwapChain->Release();
if (g_pd3dDeviceImmediateContext) g_pd3dDeviceImmediateContext->Release();
if (g_pd3dDevice) g_pd3dDevice->Release();
CleanupRenderTarget();
if (g_pSwapChain) { g_pSwapChain->Release(); g_pSwapChain = NULL; }
if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }
if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
}
extern LRESULT ImGui_ImplDX11_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
ImGuiIO& io = ImGui::GetIO();
if (ImGui_ImplDX11_WndProcHandler(hWnd, msg, wParam, lParam))
return true;
switch (msg)
{
case WM_LBUTTONDOWN:
io.MouseDown[0] = true;
return true;
case WM_LBUTTONUP:
io.MouseDown[0] = false;
return true;
case WM_RBUTTONDOWN:
io.MouseDown[1] = true;
return true;
case WM_RBUTTONUP:
io.MouseDown[1] = false;
return true;
case WM_MOUSEWHEEL:
io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
return true;
case WM_MOUSEMOVE:
// Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
io.MousePos.x = (signed short)(lParam);
io.MousePos.y = (signed short)(lParam >> 16);
return true;
case WM_KEYDOWN:
if (wParam >= 0 && wParam < 256)
io.KeysDown[wParam] = 1;
return true;
case WM_KEYUP:
if (wParam >= 0 && wParam < 256)
io.KeysDown[wParam] = 0;
return true;
case WM_CHAR:
// You can also use ToAscii()+GetKeyboardState() to retrieve characters.
if (wParam > 0 && wParam < 0x10000)
io.AddInputCharacter((unsigned short)wParam);
return true;
case WM_SIZE:
if (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED)
{
ImGui_ImplDX11_InvalidateDeviceObjects();
CleanupRenderTarget();
g_pSwapChain->ResizeBuffers(0, (UINT)LOWORD(lParam), (UINT)HIWORD(lParam), DXGI_FORMAT_UNKNOWN, 0);
CreateRenderTarget();
ImGui_ImplDX11_CreateDeviceObjects();
}
return 0;
case WM_DESTROY:
CleanupDevice();
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWnd, msg, wParam, lParam);
}
void LoadFontsTexture()
int main(int argc, char** argv)
{
// Load one or more font
ImGuiIO& io = ImGui::GetIO();
// Create application window
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, LoadCursor(NULL, IDC_ARROW), NULL, NULL, L"ImGui Example", NULL };
RegisterClassEx(&wc);
HWND hwnd = CreateWindow(L"ImGui Example", L"ImGui DirectX11 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
// Initialize Direct3D
if (CreateDeviceD3D(hwnd) < 0)
{
CleanupDeviceD3D();
UnregisterClass(L"ImGui Example", wc.hInstance);
return 1;
}
// Show the window
ShowWindow(hwnd, SW_SHOWDEFAULT);
UpdateWindow(hwnd);
// Setup ImGui binding
ImGui_ImplDX11_Init(hwnd, g_pd3dDevice, g_pd3dDeviceContext);
//ImGuiIO& io = ImGui::GetIO();
//ImFont* my_font1 = io.Fonts->AddFontDefault();
//ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("extra_fonts/Karla-Regular.ttf", 15.0f);
//ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
//ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
// Build
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
// Create texture
D3D11_TEXTURE2D_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.Width = width;
desc.Height = height;
desc.MipLevels = 1;
desc.ArraySize = 1;
desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
desc.SampleDesc.Count = 1;
desc.Usage = D3D11_USAGE_DEFAULT;
desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
desc.CPUAccessFlags = 0;
ID3D11Texture2D *pTexture = NULL;
D3D11_SUBRESOURCE_DATA subResource;
subResource.pSysMem = pixels;
subResource.SysMemPitch = desc.Width * 4;
subResource.SysMemSlicePitch = 0;
g_pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture);
// Create texture view
D3D11_SHADER_RESOURCE_VIEW_DESC srvDesc;
ZeroMemory(&srvDesc, sizeof(srvDesc));
srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
srvDesc.Texture2D.MipLevels = desc.MipLevels;
srvDesc.Texture2D.MostDetailedMip = 0;
ID3D11ShaderResourceView* font_texture_view = NULL;
g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &font_texture_view);
pTexture->Release();
// Store our identifier
io.Fonts->TexID = (void *)font_texture_view;
}
void InitImGui()
{
RECT rect;
GetClientRect(hWnd, &rect);
int display_w = (int)(rect.right - rect.left);
int display_h = (int)(rect.bottom - rect.top);
ImGuiIO& io = ImGui::GetIO();
io.DisplaySize = ImVec2((float)display_w, (float)display_h); // Display size, in pixels. For clamping windows positions.
io.DeltaTime = 1.0f/60.0f; // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our time step is variable)
io.KeyMap[ImGuiKey_Tab] = VK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array that we will update during the application lifetime.
io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
io.KeyMap[ImGuiKey_DownArrow] = VK_UP;
io.KeyMap[ImGuiKey_Home] = VK_HOME;
io.KeyMap[ImGuiKey_End] = VK_END;
io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
io.KeyMap[ImGuiKey_A] = 'A';
io.KeyMap[ImGuiKey_C] = 'C';
io.KeyMap[ImGuiKey_V] = 'V';
io.KeyMap[ImGuiKey_X] = 'X';
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImImpl_RenderDrawLists;
io.ImeWindowHandle = hWnd;
// Create the vertex buffer
{
D3D11_BUFFER_DESC bufferDesc;
memset(&bufferDesc, 0, sizeof(D3D11_BUFFER_DESC));
bufferDesc.Usage = D3D11_USAGE_DYNAMIC;
bufferDesc.ByteWidth = 100000 * sizeof(CUSTOMVERTEX); // Maybe we should handle that more dynamically?
bufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
bufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
bufferDesc.MiscFlags = 0;
if (g_pd3dDevice->CreateBuffer(&bufferDesc, NULL, &g_pVB) < 0)
{
IM_ASSERT(0);
return;
}
}
// Load fonts
LoadFontsTexture();
// Create texture sampler
{
D3D11_SAMPLER_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
desc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
desc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
desc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
desc.MipLODBias = 0.f;
desc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
desc.MinLOD = 0.f;
desc.MaxLOD = 0.f;
g_pd3dDevice->CreateSamplerState(&desc, &g_pFontSampler);
}
}
INT64 ticks_per_second = 0;
INT64 last_time = 0;
void UpdateImGui()
{
ImGuiIO& io = ImGui::GetIO();
// Setup time step
INT64 current_time;
QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
io.DeltaTime = (float)(current_time - last_time) / ticks_per_second;
last_time = current_time;
// Read keyboard modifiers inputs
io.KeyCtrl = (GetKeyState(VK_CONTROL) & 0x8000) != 0;
io.KeyShift = (GetKeyState(VK_SHIFT) & 0x8000) != 0;
// io.KeysDown : filled by WM_KEYDOWN/WM_KEYUP events
// io.MousePos : filled by WM_MOUSEMOVE events
// io.MouseDown : filled by WM_*BUTTON* events
// io.MouseWheel : filled by WM_MOUSEWHEEL events
// Start the frame
ImGui::NewFrame();
}
int main(int argc, char** argv)
{
// Register the window class
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, LoadCursor(NULL, IDC_ARROW), NULL, NULL, L"ImGui Example", NULL };
RegisterClassEx(&wc);
// Create the application's window
hWnd = CreateWindow(L"ImGui Example", L"ImGui DirectX11 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
return 1;
if (!QueryPerformanceCounter((LARGE_INTEGER *)&last_time))
return 1;
// Initialize Direct3D
if (InitDeviceD3D(hWnd) < 0)
{
CleanupDevice();
UnregisterClass(L"ImGui Example", wc.hInstance);
return 1;
}
// Show the window
ShowWindow(hWnd, SW_SHOWDEFAULT);
UpdateWindow(hWnd);
InitImGui();
bool show_test_window = true;
bool show_another_window = false;
ImVec4 clear_col = ImColor(114, 144, 154);
// Enter the message loop
// Main loop
MSG msg;
ZeroMemory(&msg, sizeof(msg));
while (msg.message != WM_QUIT)
@ -563,7 +167,7 @@ int main(int argc, char** argv)
DispatchMessage(&msg);
continue;
}
UpdateImGui();
ImGui_ImplDX11_NewFrame();
// 1. Show a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
@ -593,12 +197,13 @@ int main(int argc, char** argv)
}
// Rendering
g_pd3dDeviceImmediateContext->ClearRenderTargetView(g_mainRenderTargetView, (float*)&clear_col);
g_pd3dDeviceContext->ClearRenderTargetView(g_mainRenderTargetView, (float*)&clear_col);
ImGui::Render();
g_pSwapChain->Present(0, 0);
}
ImGui::Shutdown();
ImGui_ImplDX11_Shutdown();
CleanupDeviceD3D();
UnregisterClass(L"ImGui Example", wc.hInstance);
return 0;

6
examples/directx9_example/directx9_example.vcxproj
View File

@ -48,7 +48,7 @@
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<AdditionalIncludeDirectories>$(DXSDK_DIR)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>..\..;$(DXSDK_DIR)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -63,7 +63,7 @@
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<AdditionalIncludeDirectories>$(DXSDK_DIR)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>..\..;$(DXSDK_DIR)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -76,11 +76,13 @@
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="..\..\imgui.cpp" />
<ClCompile Include="imgui_impl_dx9.cpp" />
<ClCompile Include="main.cpp" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h" />
<ClInclude Include="..\..\imgui.h" />
<ClInclude Include="imgui_impl_dx9.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">

6
examples/directx9_example/directx9_example.vcxproj.filters
View File

@ -16,6 +16,9 @@
<ClCompile Include="..\..\imgui.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="imgui_impl_dx9.cpp">
<Filter>sources</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h">
@ -24,5 +27,8 @@
<ClInclude Include="..\..\imgui.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="imgui_impl_dx9.h">
<Filter>sources</Filter>
</ClInclude>
</ItemGroup>
</Project>

286
examples/directx9_example/imgui_impl_dx9.cpp Normal file
View File

@ -0,0 +1,286 @@
// ImGui Win32 + DirectX9 binding
// https://github.com/ocornut/imgui
#include <imgui.h>
#include "imgui_impl_dx9.h"
// DirectX
#include <d3dx9.h>
#define DIRECTINPUT_VERSION 0x0800
#include <dinput.h>
// Data
static HWND g_hWnd = 0;
static INT64 g_Time = 0;
static INT64 g_TicksPerSecond = 0;
static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
static LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL;
struct CUSTOMVERTEX
{
D3DXVECTOR3 pos;
D3DCOLOR col;
D3DXVECTOR2 uv;
};
#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE|D3DFVF_TEX1)
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImGui_ImplDX9_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
{
size_t total_vtx_count = 0;
for (int n = 0; n < cmd_lists_count; n++)
total_vtx_count += cmd_lists[n]->vtx_buffer.size();
if (total_vtx_count == 0)
return;
// Copy and convert all vertices into a single contiguous buffer
CUSTOMVERTEX* vtx_dst;
if (g_pVB->Lock(0, (UINT)total_vtx_count, (void**)&vtx_dst, D3DLOCK_DISCARD) < 0)
return;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
const ImDrawVert* vtx_src = &cmd_list->vtx_buffer[0];
for (size_t i = 0; i < cmd_list->vtx_buffer.size(); i++)
{
vtx_dst->pos.x = vtx_src->pos.x;
vtx_dst->pos.y = vtx_src->pos.y;
vtx_dst->pos.z = 0.0f;
vtx_dst->col = (vtx_src->col & 0xFF00FF00) | ((vtx_src->col & 0xFF0000)>>16) | ((vtx_src->col & 0xFF) << 16); // RGBA --> ARGB for DirectX9
vtx_dst->uv.x = vtx_src->uv.x;
vtx_dst->uv.y = vtx_src->uv.y;
vtx_dst++;
vtx_src++;
}
}
g_pVB->Unlock();
g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof( CUSTOMVERTEX ) );
g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
// Setup render state: alpha-blending, no face culling, no depth testing
g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, false );
g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, false );
g_pd3dDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, true );
g_pd3dDevice->SetRenderState( D3DRS_BLENDOP, D3DBLENDOP_ADD );
g_pd3dDevice->SetRenderState( D3DRS_ALPHATESTENABLE, false );
g_pd3dDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );
g_pd3dDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA );
g_pd3dDevice->SetRenderState( D3DRS_SCISSORTESTENABLE, true );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_DIFFUSE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );
// Setup orthographic projection matrix
D3DXMATRIXA16 mat;
D3DXMatrixIdentity(&mat);
g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat);
g_pd3dDevice->SetTransform(D3DTS_VIEW, &mat);
D3DXMatrixOrthoOffCenterLH(&mat, 0.5f, ImGui::GetIO().DisplaySize.x+0.5f, ImGui::GetIO().DisplaySize.y+0.5f, 0.5f, -1.0f, +1.0f);
g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat);
// Render command lists
int vtx_offset = 0;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
if (pcmd->user_callback)
{
pcmd->user_callback(cmd_list, pcmd);
}
else
{
const RECT r = { (LONG)pcmd->clip_rect.x, (LONG)pcmd->clip_rect.y, (LONG)pcmd->clip_rect.z, (LONG)pcmd->clip_rect.w };
g_pd3dDevice->SetTexture( 0, (LPDIRECT3DTEXTURE9)pcmd->texture_id );
g_pd3dDevice->SetScissorRect(&r);
g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_offset, pcmd->vtx_count/3);
}
vtx_offset += pcmd->vtx_count;
}
}
}
LRESULT ImGui_ImplDX9_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
ImGuiIO& io = ImGui::GetIO();
switch (msg)
{
case WM_LBUTTONDOWN:
io.MouseDown[0] = true;
return true;
case WM_LBUTTONUP:
io.MouseDown[0] = false;
return true;
case WM_RBUTTONDOWN:
io.MouseDown[1] = true;
return true;
case WM_RBUTTONUP:
io.MouseDown[1] = false;
return true;
case WM_MOUSEWHEEL:
io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
return true;
case WM_MOUSEMOVE:
io.MousePos.x = (signed short)(lParam);
io.MousePos.y = (signed short)(lParam >> 16);
return true;
case WM_KEYDOWN:
if (wParam >= 0 && wParam < 256)
io.KeysDown[wParam] = 1;
return true;
case WM_KEYUP:
if (wParam >= 0 && wParam < 256)
io.KeysDown[wParam] = 0;
return true;
case WM_CHAR:
// You can also use ToAscii()+GetKeyboardState() to retrieve characters.
if (wParam > 0 && wParam < 0x10000)
io.AddInputCharacter((unsigned short)wParam);
return true;
}
return 0;
}
bool ImGui_ImplDX9_Init(void* hwnd, IDirect3DDevice9* device)
{
g_hWnd = (HWND)hwnd;
g_pd3dDevice = device;
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond))
return false;
if (!QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
return false;
ImGuiIO& io = ImGui::GetIO();
io.KeyMap[ImGuiKey_Tab] = VK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array that we will update during the application lifetime.
io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
io.KeyMap[ImGuiKey_DownArrow] = VK_UP;
io.KeyMap[ImGuiKey_Home] = VK_HOME;
io.KeyMap[ImGuiKey_End] = VK_END;
io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
io.KeyMap[ImGuiKey_A] = 'A';
io.KeyMap[ImGuiKey_C] = 'C';
io.KeyMap[ImGuiKey_V] = 'V';
io.KeyMap[ImGuiKey_X] = 'X';
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImGui_ImplDX9_RenderDrawLists;
io.ImeWindowHandle = g_hWnd;
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
return false;
return true;
}
void ImGui_ImplDX9_Shutdown()
{
ImGui_ImplDX9_InvalidateDeviceObjects();
ImGui::Shutdown();
g_pd3dDevice = NULL;
g_hWnd = 0;
}
static void ImGui_ImplDX9_CreateFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
// Build
unsigned char* pixels;
int width, height, bytes_per_pixel;
io.Fonts->GetTexDataAsAlpha8(&pixels, &width, &height, &bytes_per_pixel);
// Create DX9 texture
LPDIRECT3DTEXTURE9 pTexture = NULL;
if (D3DXCreateTexture(g_pd3dDevice, width, height, 1, D3DUSAGE_DYNAMIC, D3DFMT_A8, D3DPOOL_DEFAULT, &pTexture) < 0)
{
IM_ASSERT(0);
return;
}
D3DLOCKED_RECT tex_locked_rect;
if (pTexture->LockRect(0, &tex_locked_rect, NULL, 0) != D3D_OK)
{
IM_ASSERT(0);
return;
}
for (int y = 0; y < height; y++)
memcpy((unsigned char *)tex_locked_rect.pBits + tex_locked_rect.Pitch * y, pixels + (width * bytes_per_pixel) * y, (width * bytes_per_pixel));
pTexture->UnlockRect(0);
// Store our identifier
io.Fonts->TexID = (void *)pTexture;
}
bool ImGui_ImplDX9_CreateDeviceObjects()
{
if (!g_pd3dDevice)
return false;
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
return false;
ImGui_ImplDX9_CreateFontsTexture();
return true;
}
void ImGui_ImplDX9_InvalidateDeviceObjects()
{
if (!g_pd3dDevice)
return;
if (g_pVB)
{
g_pVB->Release();
g_pVB = NULL;
}
if (LPDIRECT3DTEXTURE9 tex = (LPDIRECT3DTEXTURE9)ImGui::GetIO().Fonts->TexID)
{
tex->Release();
ImGui::GetIO().Fonts->TexID = 0;
}
}
void ImGui_ImplDX9_NewFrame()
{
if (!g_pVB)
ImGui_ImplDX9_CreateDeviceObjects();
ImGuiIO& io = ImGui::GetIO();
// Setup display size (every frame to accommodate for window resizing)
RECT rect;
GetClientRect(g_hWnd, &rect);
io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
// Setup time step
INT64 current_time;
QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
io.DeltaTime = (float)(current_time - g_Time) / g_TicksPerSecond;
g_Time = current_time;
// Read keyboard modifiers inputs
io.KeyCtrl = (GetKeyState(VK_CONTROL) & 0x8000) != 0;
io.KeyShift = (GetKeyState(VK_SHIFT) & 0x8000) != 0;
// io.KeysDown : filled by WM_KEYDOWN/WM_KEYUP events
// io.MousePos : filled by WM_MOUSEMOVE events
// io.MouseDown : filled by WM_*BUTTON* events
// io.MouseWheel : filled by WM_MOUSEWHEEL events
// Start the frame
ImGui::NewFrame();
}

19
examples/directx9_example/imgui_impl_dx9.h Normal file
View File

@ -0,0 +1,19 @@
// ImGui Win32 + DirectX9 binding
// https://github.com/ocornut/imgui
struct IDirect3DDevice9;
bool ImGui_ImplDX9_Init(void* hwnd, IDirect3DDevice9* device);
void ImGui_ImplDX9_Shutdown();
void ImGui_ImplDX9_NewFrame();
// Use if you want to reset your rendering device without losing ImGui state.
void ImGui_ImplDX9_InvalidateDeviceObjects();
bool ImGui_ImplDX9_CreateDeviceObjects();
// Handler for Win32 messages, update mouse/keyboard data.
// You may or not need this for your implementation, but it can serve as reference for handling inputs.
// Commented out to avoid dragging dependencies on <windows.h> types. You can copy the extern declaration in your code.
/*
extern LRESULT ImGui_ImplDX9_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
*/

354
examples/directx9_example/main.cpp
View File

@ -1,323 +1,89 @@
// ImGui - standalone example application for DirectX 9
#include <windows.h>
#include "../../imgui.h"
// DirectX 9
#include <imgui.h>
#include "imgui_impl_dx9.h"
#include <d3dx9.h>
#define DIRECTINPUT_VERSION 0x0800
#include <dinput.h>
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strdup
static HWND hWnd;
static LPDIRECT3D9 g_pD3D = NULL; // Used to create the D3DDevice
static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; // Our rendering device
static LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; // Buffer to hold vertices
struct CUSTOMVERTEX
{
D3DXVECTOR3 pos;
D3DCOLOR col;
D3DXVECTOR2 uv;
};
#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE|D3DFVF_TEX1)
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
{
size_t total_vtx_count = 0;
for (int n = 0; n < cmd_lists_count; n++)
total_vtx_count += cmd_lists[n]->vtx_buffer.size();
if (total_vtx_count == 0)
return;
// Copy and convert all vertices into a single contiguous buffer
CUSTOMVERTEX* vtx_dst;
if (g_pVB->Lock(0, (UINT)total_vtx_count, (void**)&vtx_dst, D3DLOCK_DISCARD) < 0)
return;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
const ImDrawVert* vtx_src = &cmd_list->vtx_buffer[0];
for (size_t i = 0; i < cmd_list->vtx_buffer.size(); i++)
{
vtx_dst->pos.x = vtx_src->pos.x;
vtx_dst->pos.y = vtx_src->pos.y;
vtx_dst->pos.z = 0.0f;
vtx_dst->col = (vtx_src->col & 0xFF00FF00) | ((vtx_src->col & 0xFF0000)>>16) | ((vtx_src->col & 0xFF) << 16); // RGBA --> ARGB for DirectX9
vtx_dst->uv.x = vtx_src->uv.x;
vtx_dst->uv.y = vtx_src->uv.y;
vtx_dst++;
vtx_src++;
}
}
g_pVB->Unlock();
g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof( CUSTOMVERTEX ) );
g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
// Setup render state: alpha-blending, no face culling, no depth testing
g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, false );
g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, false );
g_pd3dDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, true );
g_pd3dDevice->SetRenderState( D3DRS_BLENDOP, D3DBLENDOP_ADD );
g_pd3dDevice->SetRenderState( D3DRS_ALPHATESTENABLE, false );
g_pd3dDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );
g_pd3dDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA );
g_pd3dDevice->SetRenderState( D3DRS_SCISSORTESTENABLE, true );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_DIFFUSE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );
// Setup orthographic projection matrix
D3DXMATRIXA16 mat;
D3DXMatrixIdentity(&mat);
g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat);
g_pd3dDevice->SetTransform(D3DTS_VIEW, &mat);
D3DXMatrixOrthoOffCenterLH(&mat, 0.5f, ImGui::GetIO().DisplaySize.x+0.5f, ImGui::GetIO().DisplaySize.y+0.5f, 0.5f, -1.0f, +1.0f);
g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat);
// Render command lists
int vtx_offset = 0;
for (int n = 0; n < cmd_lists_count; n++)
{
// Render command list
const ImDrawList* cmd_list = cmd_lists[n];
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
const RECT r = { (LONG)pcmd->clip_rect.x, (LONG)pcmd->clip_rect.y, (LONG)pcmd->clip_rect.z, (LONG)pcmd->clip_rect.w };
g_pd3dDevice->SetTexture( 0, (LPDIRECT3DTEXTURE9)pcmd->texture_id );
g_pd3dDevice->SetScissorRect(&r);
g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_offset, pcmd->vtx_count/3);
vtx_offset += pcmd->vtx_count;
}
}
}
HRESULT InitDeviceD3D(HWND hWnd)
{
if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)))
return E_FAIL;
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory(&d3dpp, sizeof(d3dpp));
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
d3dpp.EnableAutoDepthStencil = TRUE;
d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
// Create the D3DDevice
if (g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice) < 0)
return E_FAIL;
return S_OK;
}
void CleanupDevice()
{
// InitImGui
if (g_pVB) g_pVB->Release();
// InitDeviceD3D
if (LPDIRECT3DTEXTURE9 tex = (LPDIRECT3DTEXTURE9)ImGui::GetIO().Fonts->TexID)
tex->Release();
if (g_pd3dDevice) g_pd3dDevice->Release();
if (g_pD3D) g_pD3D->Release();
}
// Data
static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
static D3DPRESENT_PARAMETERS g_d3dpp;
extern LRESULT ImGui_ImplDX9_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
ImGuiIO& io = ImGui::GetIO();
if (ImGui_ImplDX9_WndProcHandler(hWnd, msg, wParam, lParam))
return true;
switch (msg)
{
case WM_LBUTTONDOWN:
io.MouseDown[0] = true;
return true;
case WM_LBUTTONUP:
io.MouseDown[0] = false;
return true;
case WM_RBUTTONDOWN:
io.MouseDown[1] = true;
return true;
case WM_RBUTTONUP:
io.MouseDown[1] = false;
return true;
case WM_MOUSEWHEEL:
io.MouseWheel += GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1.0f : -1.0f;
return true;
case WM_MOUSEMOVE:
// Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
io.MousePos.x = (signed short)(lParam);
io.MousePos.y = (signed short)(lParam >> 16);
return true;
case WM_KEYDOWN:
if (wParam >= 0 && wParam < 256)
io.KeysDown[wParam] = 1;
return true;
case WM_KEYUP:
if (wParam >= 0 && wParam < 256)
io.KeysDown[wParam] = 0;
return true;
case WM_CHAR:
// You can also use ToAscii()+GetKeyboardState() to retrieve characters.
if (wParam > 0 && wParam < 0x10000)
io.AddInputCharacter((unsigned short)wParam);
return true;
case WM_SIZE:
if (g_pd3dDevice != NULL && wParam != SIZE_MINIMIZED)
{
ImGui_ImplDX9_InvalidateDeviceObjects();
g_d3dpp.BackBufferWidth = LOWORD(lParam);
g_d3dpp.BackBufferHeight = HIWORD(lParam);
HRESULT hr = g_pd3dDevice->Reset(&g_d3dpp);
if (hr == D3DERR_INVALIDCALL)
IM_ASSERT(0);
ImGui_ImplDX9_CreateDeviceObjects();
}
return 0;
case WM_DESTROY:
CleanupDevice();
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWnd, msg, wParam, lParam);
}
void LoadFontsTexture()
int main(int argc, char** argv)
{
// Load one or more font
ImGuiIO& io = ImGui::GetIO();
// Create application window
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, LoadCursor(NULL, IDC_ARROW), NULL, NULL, L"ImGui Example", NULL };
RegisterClassEx(&wc);
HWND hwnd = CreateWindow(L"ImGui Example", L"ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
// Initialize Direct3D
LPDIRECT3D9 pD3D;
if ((pD3D = Direct3DCreate9(D3D_SDK_VERSION)) == NULL)
{
UnregisterClass(L"ImGui Example", wc.hInstance);
return 0;
}
ZeroMemory(&g_d3dpp, sizeof(g_d3dpp));
g_d3dpp.Windowed = TRUE;
g_d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
g_d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
g_d3dpp.EnableAutoDepthStencil = TRUE;
g_d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
g_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
// Create the D3DDevice
if (pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &g_d3dpp, &g_pd3dDevice) < 0)
{
pD3D->Release();
UnregisterClass(L"ImGui Example", wc.hInstance);
return 0;
}
// Setup ImGui binding
ImGui_ImplDX9_Init(hwnd, g_pd3dDevice);
//ImGuiIO& io = ImGui::GetIO();
//ImFont* my_font1 = io.Fonts->AddFontDefault();
//ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("extra_fonts/Karla-Regular.ttf", 15.0f);
//ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
//ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
// Build
unsigned char* pixels;
int width, height, bytes_per_pixel;
io.Fonts->GetTexDataAsAlpha8(&pixels, &width, &height, &bytes_per_pixel);
// Create texture
LPDIRECT3DTEXTURE9 pTexture = NULL;
if (D3DXCreateTexture(g_pd3dDevice, width, height, 1, D3DUSAGE_DYNAMIC, D3DFMT_A8, D3DPOOL_DEFAULT, &pTexture) < 0)
{
IM_ASSERT(0);
return;
}
// Copy pixels
D3DLOCKED_RECT tex_locked_rect;
if (pTexture->LockRect(0, &tex_locked_rect, NULL, 0) != D3D_OK)
{
IM_ASSERT(0);
return;
}
for (int y = 0; y < height; y++)
memcpy((unsigned char *)tex_locked_rect.pBits + tex_locked_rect.Pitch * y, pixels + (width * bytes_per_pixel) * y, (width * bytes_per_pixel));
pTexture->UnlockRect(0);
// Store our identifier
io.Fonts->TexID = (void *)pTexture;
}
void InitImGui()
{
RECT rect;
GetClientRect(hWnd, &rect);
int display_w = (int)(rect.right - rect.left);
int display_h = (int)(rect.bottom - rect.top);
ImGuiIO& io = ImGui::GetIO();
io.DisplaySize = ImVec2((float)display_w, (float)display_h); // Display size, in pixels. For clamping windows positions.
io.DeltaTime = 1.0f/60.0f; // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our time step is variable)
io.KeyMap[ImGuiKey_Tab] = VK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array that we will update during the application lifetime.
io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
io.KeyMap[ImGuiKey_DownArrow] = VK_UP;
io.KeyMap[ImGuiKey_Home] = VK_HOME;
io.KeyMap[ImGuiKey_End] = VK_END;
io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
io.KeyMap[ImGuiKey_A] = 'A';
io.KeyMap[ImGuiKey_C] = 'C';
io.KeyMap[ImGuiKey_V] = 'V';
io.KeyMap[ImGuiKey_X] = 'X';
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImImpl_RenderDrawLists;
io.ImeWindowHandle = hWnd;
// Create the vertex buffer
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
{
IM_ASSERT(0);
return;
}
LoadFontsTexture();
}
INT64 ticks_per_second = 0;
INT64 last_time = 0;
void UpdateImGui()
{
ImGuiIO& io = ImGui::GetIO();
// Setup time step
INT64 current_time;
QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
io.DeltaTime = (float)(current_time - last_time) / ticks_per_second;
last_time = current_time;
// Read keyboard modifiers inputs
io.KeyCtrl = (GetKeyState(VK_CONTROL) & 0x8000) != 0;
io.KeyShift = (GetKeyState(VK_SHIFT) & 0x8000) != 0;
// io.KeysDown : filled by WM_KEYDOWN/WM_KEYUP events
// io.MousePos : filled by WM_MOUSEMOVE events
// io.MouseDown : filled by WM_*BUTTON* events
// io.MouseWheel : filled by WM_MOUSEWHEEL events
// Start the frame
ImGui::NewFrame();
}
int main(int argc, char** argv)
{
// Register the window class
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(NULL), NULL, LoadCursor(NULL, IDC_ARROW), NULL, NULL, L"ImGui Example", NULL };
RegisterClassEx(&wc);
// Create the application's window
hWnd = CreateWindow(L"ImGui Example", L"ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
return 1;
if (!QueryPerformanceCounter((LARGE_INTEGER *)&last_time))
return 1;
// Initialize Direct3D
if (InitDeviceD3D(hWnd) < 0)
{
CleanupDevice();
UnregisterClass(L"ImGui Example", wc.hInstance);
return 1;
}
// Show the window
ShowWindow(hWnd, SW_SHOWDEFAULT);
UpdateWindow(hWnd);
InitImGui();
ShowWindow(hwnd, SW_SHOWDEFAULT);
UpdateWindow(hwnd);
bool show_test_window = true;
bool show_another_window = false;
ImVec4 clear_col = ImColor(114, 144, 154);
// Enter the message loop
// Main loop
MSG msg;
ZeroMemory(&msg, sizeof(msg));
while (msg.message != WM_QUIT)
@ -328,7 +94,7 @@ int main(int argc, char** argv)
DispatchMessage(&msg);
continue;
}
UpdateImGui();
ImGui_ImplDX9_NewFrame();
// 1. Show a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
@ -371,8 +137,10 @@ int main(int argc, char** argv)
g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
}
ImGui::Shutdown();
ImGui_ImplDX9_Shutdown();
if (g_pd3dDevice) g_pd3dDevice->Release();
if (pD3D) pD3D->Release();
UnregisterClass(L"ImGui Example", wc.hInstance);
return 0;
}

10
examples/opengl3_example/Makefile
View File

@ -1,6 +1,5 @@
#
# Cross Platform Make file
#
# Cross Platform Makefile
# Compatible with Ubuntu 14.04.1 and Mac OS X
#
#
@ -11,9 +10,8 @@
#CXX = g++
OBJS = main.o
OBJS = main.o imgui_impl_glfw_gl3.o gl3w/GL/gl3w.o
OBJS += ../../imgui.o
OBJS += ../opengl_example/gl3w/GL/gl3w.o
UNAME_S := $(shell uname -s)
@ -22,7 +20,7 @@ ifeq ($(UNAME_S), Linux) #LINUX
ECHO_MESSAGE = "Linux"
LIBS = `pkg-config --static --libs glfw3`
CXXFLAGS = -I../../ -I../opengl_example/gl3w `pkg-config --cflags glfw3`
CXXFLAGS = -I../../ -Igl3w `pkg-config --cflags glfw3`
CXXFLAGS += -Wall
CFLAGS = $(CXXFLAGS)
endif
@ -33,7 +31,7 @@ ifeq ($(UNAME_S), Darwin) #APPLE
LIBS += -L/usr/local/lib
LIBS += -lglfw3
CXXFLAGS = -I../../ -I../opengl_example/gl3w -I/usr/local/Cellar/glew/1.10.0/include -I/usr/local/include
CXXFLAGS = -I../../ -Igl3w -I/usr/local/Cellar/glew/1.10.0/include -I/usr/local/include
CXXFLAGS += -Wall
# CXXFLAGS += -D__APPLE__
CFLAGS = $(CXXFLAGS)

0
examples/opengl_example/gl3w/GL/gl3w.c → examples/opengl3_example/gl3w/GL/gl3w.c
View File

0
examples/opengl_example/gl3w/GL/gl3w.h → examples/opengl3_example/gl3w/GL/gl3w.h
View File

0
examples/opengl_example/gl3w/GL/glcorearb.h → examples/opengl3_example/gl3w/GL/glcorearb.h
View File

348
examples/opengl3_example/imgui_impl_glfw_gl3.cpp Normal file
View File

@ -0,0 +1,348 @@
// ImGui GLFW binding with OpenGL3 + shaders
// https://github.com/ocornut/imgui
#include <imgui.h>
#include "imgui_impl_glfw_gl3.h"
// GL3W/GLFW
#include <GL/gl3w.h>
#include <GLFW/glfw3.h>
#ifdef _MSC_VER
#undef APIENTRY
#define GLFW_EXPOSE_NATIVE_WIN32
#define GLFW_EXPOSE_NATIVE_WGL
#include <GLFW/glfw3native.h>
#endif
// Data
static GLFWwindow* g_Window = NULL;
static double g_Time = 0.0f;
static bool g_MousePressed[3] = { false, false, false };
static float g_MouseWheel = 0.0f;
static GLuint g_FontTexture = 0;
static int g_ShaderHandle = 0, g_VertHandle = 0, g_FragHandle = 0;
static int g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0;
static int g_AttribLocationPosition = 0, g_AttribLocationUV = 0, g_AttribLocationColor = 0;
static size_t g_VboMaxSize = 20000;
static unsigned int g_VboHandle = 0, g_VaoHandle = 0;
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImGui_ImplGlfwGL3_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
{
if (cmd_lists_count == 0)
return;
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled
glEnable(GL_BLEND);
glBlendEquation(GL_FUNC_ADD);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glEnable(GL_SCISSOR_TEST);
glActiveTexture(GL_TEXTURE0);
// Setup orthographic projection matrix
const float width = ImGui::GetIO().DisplaySize.x;
const float height = ImGui::GetIO().DisplaySize.y;
const float ortho_projection[4][4] =
{
{ 2.0f/width, 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f/-height, 0.0f, 0.0f },
{ 0.0f, 0.0f, -1.0f, 0.0f },
{ -1.0f, 1.0f, 0.0f, 1.0f },
};
glUseProgram(g_ShaderHandle);
glUniform1i(g_AttribLocationTex, 0);
glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
// Grow our buffer according to what we need
size_t total_vtx_count = 0;
for (int n = 0; n < cmd_lists_count; n++)
total_vtx_count += cmd_lists[n]->vtx_buffer.size();
glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
size_t neededBufferSize = total_vtx_count * sizeof(ImDrawVert);
if (neededBufferSize > g_VboMaxSize)
{
g_VboMaxSize = neededBufferSize + 5000; // Grow buffer
glBufferData(GL_ARRAY_BUFFER, g_VboMaxSize, NULL, GL_STREAM_DRAW);
}
// Copy and convert all vertices into a single contiguous buffer
unsigned char* buffer_data = (unsigned char*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
if (!buffer_data)
return;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
memcpy(buffer_data, &cmd_list->vtx_buffer[0], cmd_list->vtx_buffer.size() * sizeof(ImDrawVert));
buffer_data += cmd_list->vtx_buffer.size() * sizeof(ImDrawVert);
}
glUnmapBuffer(GL_ARRAY_BUFFER);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(g_VaoHandle);
int cmd_offset = 0;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
int vtx_offset = cmd_offset;
const ImDrawCmd* pcmd_end = cmd_list->commands.end();
for (const ImDrawCmd* pcmd = cmd_list->commands.begin(); pcmd != pcmd_end; pcmd++)
{
if (pcmd->user_callback)
{
pcmd->user_callback(cmd_list, pcmd);
}
else
{
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->texture_id);
glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
}
vtx_offset += pcmd->vtx_count;
}
cmd_offset = vtx_offset;
}
// Restore modified state
glBindVertexArray(0);
glUseProgram(0);
glDisable(GL_SCISSOR_TEST);
glBindTexture(GL_TEXTURE_2D, 0);
}
static const char* ImGui_ImplGlfwGL3_GetClipboardText()
{
return glfwGetClipboardString(g_Window);
}
static void ImGui_ImplGlfwGL3_SetClipboardText(const char* text)
{
glfwSetClipboardString(g_Window, text);
}
void ImGui_ImplGlfwGL3_MouseButtonCallback(GLFWwindow* window, int button, int action, int mods)
{
if (action == GLFW_PRESS && button >= 0 && button < 3)
g_MousePressed[button] = true;
}
void ImGui_ImplGlfwGL3_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset)
{
g_MouseWheel += (float)yoffset; // Use fractional mouse wheel, 1.0 unit 5 lines.
}
void ImGui_ImplGlfwGL3_KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
ImGuiIO& io = ImGui::GetIO();
if (action == GLFW_PRESS)
io.KeysDown[key] = true;
if (action == GLFW_RELEASE)
io.KeysDown[key] = false;
io.KeyCtrl = (mods & GLFW_MOD_CONTROL) != 0;
io.KeyShift = (mods & GLFW_MOD_SHIFT) != 0;
}
void ImGui_ImplGlfwGL3_CharCallback(GLFWwindow* window, unsigned int c)
{
ImGuiIO& io = ImGui::GetIO();
if (c > 0 && c < 0x10000)
io.AddInputCharacter((unsigned short)c);
}
void ImGui_ImplGlfwGL3_CreateFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bits for OpenGL3 demo because it is more likely to be compatible with user's existing shader.
glGenTextures(1, &g_FontTexture);
glBindTexture(GL_TEXTURE_2D, g_FontTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
// Store our identifier
io.Fonts->TexID = (void *)(intptr_t)g_FontTexture;
}
bool ImGui_ImplGlfwGL3_CreateDeviceObjects()
{
const GLchar *vertex_shader =
"#version 330\n"
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader =
"#version 330\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture( Texture, Frag_UV.st);\n"
"}\n";
g_ShaderHandle = glCreateProgram();
g_VertHandle = glCreateShader(GL_VERTEX_SHADER);
g_FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(g_VertHandle, 1, &vertex_shader, 0);
glShaderSource(g_FragHandle, 1, &fragment_shader, 0);
glCompileShader(g_VertHandle);
glCompileShader(g_FragHandle);
glAttachShader(g_ShaderHandle, g_VertHandle);
glAttachShader(g_ShaderHandle, g_FragHandle);
glLinkProgram(g_ShaderHandle);
g_AttribLocationTex = glGetUniformLocation(g_ShaderHandle, "Texture");
g_AttribLocationProjMtx = glGetUniformLocation(g_ShaderHandle, "ProjMtx");
g_AttribLocationPosition = glGetAttribLocation(g_ShaderHandle, "Position");
g_AttribLocationUV = glGetAttribLocation(g_ShaderHandle, "UV");
g_AttribLocationColor = glGetAttribLocation(g_ShaderHandle, "Color");
glGenBuffers(1, &g_VboHandle);
glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
glBufferData(GL_ARRAY_BUFFER, g_VboMaxSize, NULL, GL_DYNAMIC_DRAW);
glGenVertexArrays(1, &g_VaoHandle);
glBindVertexArray(g_VaoHandle);
glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
glEnableVertexAttribArray(g_AttribLocationPosition);
glEnableVertexAttribArray(g_AttribLocationUV);
glEnableVertexAttribArray(g_AttribLocationColor);
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
glVertexAttribPointer(g_AttribLocationPosition, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, pos));
glVertexAttribPointer(g_AttribLocationUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, uv));
glVertexAttribPointer(g_AttribLocationColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, col));
#undef OFFSETOF
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
ImGui_ImplGlfwGL3_CreateFontsTexture();
return true;
}
bool ImGui_ImplGlfwGL3_Init(GLFWwindow* window, bool install_callbacks)
{
g_Window = window;
ImGuiIO& io = ImGui::GetIO();
io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
io.KeyMap[ImGuiKey_DownArrow] = GLFW_KEY_DOWN;
io.KeyMap[ImGuiKey_Home] = GLFW_KEY_HOME;
io.KeyMap[ImGuiKey_End] = GLFW_KEY_END;
io.KeyMap[ImGuiKey_Delete] = GLFW_KEY_DELETE;
io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;
io.KeyMap[ImGuiKey_V] = GLFW_KEY_V;
io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
io.RenderDrawListsFn = ImGui_ImplGlfwGL3_RenderDrawLists;
io.SetClipboardTextFn = ImGui_ImplGlfwGL3_SetClipboardText;
io.GetClipboardTextFn = ImGui_ImplGlfwGL3_GetClipboardText;
#ifdef _MSC_VER
io.ImeWindowHandle = glfwGetWin32Window(g_Window);
#endif
if (install_callbacks)
{
glfwSetMouseButtonCallback(window, ImGui_ImplGlfwGL3_MouseButtonCallback);
glfwSetScrollCallback(window, ImGui_ImplGlfwGL3_ScrollCallback);
glfwSetKeyCallback(window, ImGui_ImplGlfwGL3_KeyCallback);
glfwSetCharCallback(window, ImGui_ImplGlfwGL3_CharCallback);
}
return true;
}
void ImGui_ImplGlfwGL3_Shutdown()
{
if (g_VaoHandle) glDeleteVertexArrays(1, &g_VaoHandle);
if (g_VboHandle) glDeleteBuffers(1, &g_VboHandle);
g_VaoHandle = 0;
g_VboHandle = 0;
glDetachShader(g_ShaderHandle, g_VertHandle);
glDeleteShader(g_VertHandle);
g_VertHandle = 0;
glDetachShader(g_ShaderHandle, g_FragHandle);
glDeleteShader(g_FragHandle);
g_FragHandle = 0;
glDeleteProgram(g_ShaderHandle);
g_ShaderHandle = 0;
if (g_FontTexture)
{
glDeleteTextures(1, &g_FontTexture);
ImGui::GetIO().Fonts->TexID = 0;
g_FontTexture = 0;
}
ImGui::Shutdown();
}
void ImGui_ImplGlfwGL3_NewFrame()
{
if (!g_FontTexture)
ImGui_ImplGlfwGL3_CreateDeviceObjects();
ImGuiIO& io = ImGui::GetIO();
// Setup display size (every frame to accommodate for window resizing)
int w, h;
int display_w, display_h;
glfwGetWindowSize(g_Window, &w, &h);
glfwGetFramebufferSize(g_Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)display_w, (float)display_h);
// Setup time step
double current_time = glfwGetTime();
io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f/60.0f);
g_Time = current_time;
// Setup inputs
// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
double mouse_x, mouse_y;
glfwGetCursorPos(g_Window, &mouse_x, &mouse_y);
mouse_x *= (float)display_w / w; // Convert mouse coordinates to pixels
mouse_y *= (float)display_h / h;
io.MousePos = ImVec2((float)mouse_x, (float)mouse_y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
for (int i = 0; i < 3; i++)
{
io.MouseDown[i] = g_MousePressed[i] || glfwGetMouseButton(g_Window, i) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
g_MousePressed[i] = false;
}
io.MouseWheel = g_MouseWheel;
g_MouseWheel = 0.0f;
// Start the frame
ImGui::NewFrame();
}

20
examples/opengl3_example/imgui_impl_glfw_gl3.h Normal file
View File

@ -0,0 +1,20 @@
// ImGui GLFW binding with OpenGL3 + shaders
// https://github.com/ocornut/imgui
struct GLFWwindow;
bool ImGui_ImplGlfwGL3_Init(GLFWwindow* window, bool install_callbacks);
void ImGui_ImplGlfwGL3_Shutdown();
void ImGui_ImplGlfwGL3_NewFrame();
// Use if you want to reset your rendering device without losing ImGui state.
void ImGui_ImplGlfwGL3_InvalidateDeviceObjects();
bool ImGui_ImplGlfwGL3_CreateDeviceObjects();
// GLFW callbacks (installed by default if you enable 'install_callbacks' during initialization)
// Provided here if you want to chain callbacks.
// You can also handle inputs yourself and use those as a reference.
void ImGui_ImplGlfwGL3_MouseButtonCallback(GLFWwindow* window, int button, int action, int mods);
void ImGui_ImplGlfwGL3_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset);
void ImGui_ImplGlFwGL3_KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods);
void ImGui_ImplGlfwGL3_CharCallback(GLFWwindow* window, unsigned int c);

342
examples/opengl3_example/main.cpp
View File

@ -1,346 +1,48 @@
// ImGui - standalone example application for OpenGL 3, using programmable pipeline
// ImGui - standalone example application for Glfw + OpenGL 3, using programmable pipeline
#ifdef _MSC_VER
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#endif
#ifdef __clang__
#pragma clang diagnostic ignored "-Wunused-function" // warning: unused function
#endif
#include "../../imgui.h"
#include <imgui.h>
#include "imgui_impl_glfw_gl3.h"
#include <stdio.h>
// Gl3W / GLFW
#include <GL/gl3w.h>
#include <GLFW/glfw3.h>
#ifdef _MSC_VER
#undef APIENTRY
#define GLFW_EXPOSE_NATIVE_WIN32
#define GLFW_EXPOSE_NATIVE_WGL
#include <GLFW/glfw3native.h>
#endif
static GLFWwindow* window;
static bool mousePressed[2] = { false, false };
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
// Shader variables
static int shader_handle, vert_handle, frag_handle;
static int texture_location, proj_mtx_location;
static int position_location, uv_location, colour_location;
static size_t vbo_max_size = 20000;
static unsigned int vbo_handle, vao_handle;
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
static void error_callback(int error, const char* description)
{
if (cmd_lists_count == 0)
return;
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled
glEnable(GL_BLEND);
glBlendEquation(GL_FUNC_ADD);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glEnable(GL_SCISSOR_TEST);
glActiveTexture(GL_TEXTURE0);
// Setup orthographic projection matrix
const float width = ImGui::GetIO().DisplaySize.x;
const float height = ImGui::GetIO().DisplaySize.y;
const float ortho_projection[4][4] =
{
{ 2.0f/width, 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f/-height, 0.0f, 0.0f },
{ 0.0f, 0.0f, -1.0f, 0.0f },
{ -1.0f, 1.0f, 0.0f, 1.0f },
};
glUseProgram(shader_handle);
glUniform1i(texture_location, 0);
glUniformMatrix4fv(proj_mtx_location, 1, GL_FALSE, &ortho_projection[0][0]);
// Grow our buffer according to what we need
size_t total_vtx_count = 0;
for (int n = 0; n < cmd_lists_count; n++)
total_vtx_count += cmd_lists[n]->vtx_buffer.size();
glBindBuffer(GL_ARRAY_BUFFER, vbo_handle);
size_t neededBufferSize = total_vtx_count * sizeof(ImDrawVert);
if (neededBufferSize > vbo_max_size)
{
vbo_max_size = neededBufferSize + 5000; // Grow buffer
glBufferData(GL_ARRAY_BUFFER, vbo_max_size, NULL, GL_STREAM_DRAW);
}
// Copy and convert all vertices into a single contiguous buffer
unsigned char* buffer_data = (unsigned char*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
if (!buffer_data)
return;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
memcpy(buffer_data, &cmd_list->vtx_buffer[0], cmd_list->vtx_buffer.size() * sizeof(ImDrawVert));
buffer_data += cmd_list->vtx_buffer.size() * sizeof(ImDrawVert);
}
glUnmapBuffer(GL_ARRAY_BUFFER);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(vao_handle);
int cmd_offset = 0;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
int vtx_offset = cmd_offset;
const ImDrawCmd* pcmd_end = cmd_list->commands.end();
for (const ImDrawCmd* pcmd = cmd_list->commands.begin(); pcmd != pcmd_end; pcmd++)
{
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->texture_id);
glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
vtx_offset += pcmd->vtx_count;
}
cmd_offset = vtx_offset;
}
// Restore modified state
glBindVertexArray(0);
glUseProgram(0);
glDisable(GL_SCISSOR_TEST);
glBindTexture(GL_TEXTURE_2D, 0);
fprintf(stderr, "Error: %s\n", description);
}
static const char* ImImpl_GetClipboardTextFn()
int main(int argc, char** argv)
{
return glfwGetClipboardString(window);
}
static void ImImpl_SetClipboardTextFn(const char* text)
{
glfwSetClipboardString(window, text);
}
// GLFW callbacks to get events
static void glfw_error_callback(int error, const char* description)
{
fputs(description, stderr);
}
static void glfw_mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
{
if (action == GLFW_PRESS && button >= 0 && button < 2)
mousePressed[button] = true;
}
static void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
{
ImGuiIO& io = ImGui::GetIO();
io.MouseWheel += (float)yoffset; // Use fractional mouse wheel, 1.0 unit 5 lines.
}
static void glfw_key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
ImGuiIO& io = ImGui::GetIO();
if (action == GLFW_PRESS)
io.KeysDown[key] = true;
if (action == GLFW_RELEASE)
io.KeysDown[key] = false;
io.KeyCtrl = (mods & GLFW_MOD_CONTROL) != 0;
io.KeyShift = (mods & GLFW_MOD_SHIFT) != 0;
}
static void glfw_char_callback(GLFWwindow* window, unsigned int c)
{
if (c > 0 && c < 0x10000)
ImGui::GetIO().AddInputCharacter((unsigned short)c);
}
void InitGL()
{
glfwSetErrorCallback(glfw_error_callback);
// Setup window
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(1);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
window = glfwCreateWindow(1280, 720, "ImGui OpenGL3 example", NULL, NULL);
GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui OpenGL3 example", NULL, NULL);
glfwMakeContextCurrent(window);
glfwSetKeyCallback(window, glfw_key_callback);
glfwSetMouseButtonCallback(window, glfw_mouse_button_callback);
glfwSetScrollCallback(window, glfw_scroll_callback);
glfwSetCharCallback(window, glfw_char_callback);
gl3wInit();
const GLchar *vertex_shader =
"#version 330\n"
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader =
"#version 330\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture( Texture, Frag_UV.st);\n"
"}\n";
shader_handle = glCreateProgram();
vert_handle = glCreateShader(GL_VERTEX_SHADER);
frag_handle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(vert_handle, 1, &vertex_shader, 0);
glShaderSource(frag_handle, 1, &fragment_shader, 0);
glCompileShader(vert_handle);
glCompileShader(frag_handle);
glAttachShader(shader_handle, vert_handle);
glAttachShader(shader_handle, frag_handle);
glLinkProgram(shader_handle);
texture_location = glGetUniformLocation(shader_handle, "Texture");
proj_mtx_location = glGetUniformLocation(shader_handle, "ProjMtx");
position_location = glGetAttribLocation(shader_handle, "Position");
uv_location = glGetAttribLocation(shader_handle, "UV");
colour_location = glGetAttribLocation(shader_handle, "Color");
glGenBuffers(1, &vbo_handle);
glBindBuffer(GL_ARRAY_BUFFER, vbo_handle);
glBufferData(GL_ARRAY_BUFFER, vbo_max_size, NULL, GL_DYNAMIC_DRAW);
glGenVertexArrays(1, &vao_handle);
glBindVertexArray(vao_handle);
glBindBuffer(GL_ARRAY_BUFFER, vbo_handle);
glEnableVertexAttribArray(position_location);
glEnableVertexAttribArray(uv_location);
glEnableVertexAttribArray(colour_location);
glVertexAttribPointer(position_location, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, pos));
glVertexAttribPointer(uv_location, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, uv));
glVertexAttribPointer(colour_location, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, col));
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
void LoadFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
// Setup ImGui binding
ImGui_ImplGlfwGL3_Init(window, true);
//ImGuiIO& io = ImGui::GetIO();
//ImFont* my_font1 = io.Fonts->AddFontDefault();
//ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("extra_fonts/Karla-Regular.ttf", 15.0f);
//ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
//ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bits for OpenGL3 demo because it is more likely to be compatible with user's existing shader.
GLuint tex_id;
glGenTextures(1, &tex_id);
glBindTexture(GL_TEXTURE_2D, tex_id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
// Store our identifier
io.Fonts->TexID = (void *)(intptr_t)tex_id;
}
void InitImGui()
{
ImGuiIO& io = ImGui::GetIO();
io.DeltaTime = 1.0f / 60.0f; // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our timestep is variable)
io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
io.KeyMap[ImGuiKey_DownArrow] = GLFW_KEY_DOWN;
io.KeyMap[ImGuiKey_Home] = GLFW_KEY_HOME;
io.KeyMap[ImGuiKey_End] = GLFW_KEY_END;
io.KeyMap[ImGuiKey_Delete] = GLFW_KEY_DELETE;
io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;
io.KeyMap[ImGuiKey_V] = GLFW_KEY_V;
io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
io.RenderDrawListsFn = ImImpl_RenderDrawLists;
io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
#ifdef _MSC_VER
io.ImeWindowHandle = glfwGetWin32Window(window);
#endif
LoadFontsTexture();
}
void UpdateImGui()
{
ImGuiIO& io = ImGui::GetIO();
// Setup resolution (every frame to accommodate for window resizing)
int w, h;
int display_w, display_h;
glfwGetWindowSize(window, &w, &h);
glfwGetFramebufferSize(window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)display_w, (float)display_h); // Display size, in pixels. For clamping windows positions.
// Setup time step
static double time = 0.0f;
const double current_time = glfwGetTime();
io.DeltaTime = (float)(current_time - time);
time = current_time;
// Setup inputs
// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
double mouse_x, mouse_y;
glfwGetCursorPos(window, &mouse_x, &mouse_y);
mouse_x *= (float)display_w / w; // Convert mouse coordinates to pixels
mouse_y *= (float)display_h / h;
io.MousePos = ImVec2((float)mouse_x, (float)mouse_y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
io.MouseDown[0] = mousePressed[0] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
io.MouseDown[1] = mousePressed[1] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;
// Start the frame
ImGui::NewFrame();
}
// Application code
int main(int argc, char** argv)
{
InitGL();
InitImGui();
bool show_test_window = true;
bool show_another_window = false;
ImVec4 clear_col = ImColor(114, 144, 154);
ImVec4 clear_color = ImColor(114, 144, 154);
// Main loop
while (!glfwWindowShouldClose(window))
{
ImGuiIO& io = ImGui::GetIO();
io.MouseWheel = 0;
mousePressed[0] = mousePressed[1] = false;
glfwPollEvents();
UpdateImGui();
ImGui_ImplGlfwGL3_NewFrame();
// 1. Show a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
@ -348,7 +50,7 @@ int main(int argc, char** argv)
static float f;
ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
ImGui::ColorEdit3("clear color", (float*)&clear_col);
ImGui::ColorEdit3("clear color", (float*)&clear_color);
if (ImGui::Button("Test Window")) show_test_window ^= 1;
if (ImGui::Button("Another Window")) show_another_window ^= 1;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
@ -371,22 +73,14 @@ int main(int argc, char** argv)
// Rendering
glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
glClearColor(clear_col.x, clear_col.y, clear_col.z, clear_col.w);
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);
ImGui::Render();
glfwSwapBuffers(window);
}
// Cleanup
if (vao_handle) glDeleteVertexArrays(1, &vao_handle);
if (vbo_handle) glDeleteBuffers(1, &vbo_handle);
glDetachShader(shader_handle, vert_handle);
glDetachShader(shader_handle, frag_handle);
glDeleteShader(vert_handle);
glDeleteShader(frag_handle);
glDeleteProgram(shader_handle);
ImGui::Shutdown();
ImGui_ImplGlfwGL3_Shutdown();
glfwTerminate();
return 0;

12
examples/opengl3_example/opengl3_example.vcxproj
View File

@ -39,16 +39,18 @@
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<OutDir>$(ProjectDir)$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)$(Configuration)\</IntDir>
<IncludePath>$(IncludePath)</IncludePath>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<OutDir>$(ProjectDir)$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)$(Configuration)\</IntDir>
<IncludePath>$(IncludePath)</IncludePath>
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<AdditionalIncludeDirectories>$(ProjectDir)..\opengl_example\glfw\include;$(ProjectDir)..\opengl_example\glew\include;$(ProjectDir)..\opengl_example\gl3w;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>$(ProjectDir)..\opengl_example\glfw\include;gl3w;..\..;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -64,7 +66,7 @@
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<AdditionalIncludeDirectories>$(ProjectDir)..\opengl_example\glfw\include;$(ProjectDir)..\opengl_example\glew\include;$(ProjectDir)..\opengl_example\gl3w;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>$(ProjectDir)..\opengl_example\glfw\include;gl3w;..\..;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -79,12 +81,16 @@
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="..\..\imgui.cpp" />
<ClCompile Include="..\opengl_example\gl3w\GL\gl3w.c" />
<ClCompile Include="gl3w\GL\gl3w.c" />
<ClCompile Include="imgui_impl_glfw_gl3.cpp" />
<ClCompile Include="main.cpp" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h" />
<ClInclude Include="..\..\imgui.h" />
<ClInclude Include="gl3w\GL\gl3w.h" />
<ClInclude Include="gl3w\GL\glcorearb.h" />
<ClInclude Include="imgui_impl_glfw_gl3.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">

17
examples/opengl3_example/opengl3_example.vcxproj.filters
View File

@ -8,6 +8,9 @@
<UniqueIdentifier>{f18ab499-84e1-499f-8eff-9754361e0e52}</UniqueIdentifier>
<Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
</Filter>
<Filter Include="gl3w">
<UniqueIdentifier>{42f99867-3108-43b8-99d0-fabefaf1f2e3}</UniqueIdentifier>
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="main.cpp">
@ -16,9 +19,12 @@
<ClCompile Include="..\..\imgui.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\opengl_example\gl3w\GL\gl3w.c">
<ClCompile Include="imgui_impl_glfw_gl3.cpp">
<Filter>sources</Filter>
</ClCompile>
<ClCompile Include="gl3w\GL\gl3w.c">
<Filter>gl3w</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h">
@ -27,5 +33,14 @@
<ClInclude Include="..\..\imgui.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="imgui_impl_glfw_gl3.h">
<Filter>sources</Filter>
</ClInclude>
<ClInclude Include="gl3w\GL\gl3w.h">
<Filter>gl3w</Filter>
</ClInclude>
<ClInclude Include="gl3w\GL\glcorearb.h">
<Filter>gl3w</Filter>
</ClInclude>
</ItemGroup>
</Project>

5
examples/opengl_example/Makefile
View File

@ -1,6 +1,5 @@
#
# Cross Platform Make file
#
# Cross Platform Makefile
# Compatible with Ubuntu 14.04.1 and Mac OS X
#
#
@ -11,7 +10,7 @@
#CXX = g++
OBJS = main.o
OBJS = main.o imgui_impl_glfw.o
OBJS += ../../imgui.o
UNAME_S := $(shell uname -s)

252
examples/opengl_example/imgui_impl_glfw.cpp Normal file
View File

@ -0,0 +1,252 @@
// ImGui GLFW binding with OpenGL
// https://github.com/ocornut/imgui
#include <imgui.h>
#include "imgui_impl_glfw.h"
// GLFW
#include <GLFW/glfw3.h>
#ifdef _MSC_VER
#undef APIENTRY
#define GLFW_EXPOSE_NATIVE_WIN32
#define GLFW_EXPOSE_NATIVE_WGL
#include <GLFW/glfw3native.h>
#endif
// Data
static GLFWwindow* g_Window = NULL;
static double g_Time = 0.0f;
static bool g_MousePressed[3] = { false, false, false };
static float g_MouseWheel = 0.0f;
static GLuint g_FontTexture = 0;
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImGui_ImplGlfw_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
{
if (cmd_lists_count == 0)
return;
// We are using the OpenGL fixed pipeline to make the example code simpler to read!
// A probable faster way to render would be to collate all vertices from all cmd_lists into a single vertex buffer.
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers.
glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glEnable(GL_SCISSOR_TEST);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glEnable(GL_TEXTURE_2D);
// Setup orthographic projection matrix
const float width = ImGui::GetIO().DisplaySize.x;
const float height = ImGui::GetIO().DisplaySize.y;
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0f, width, height, 0.0f, -1.0f, +1.0f);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
// Render command lists
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->vtx_buffer.front();
glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, pos)));
glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, uv)));
glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, col)));
int vtx_offset = 0;
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
if (pcmd->user_callback)
{
pcmd->user_callback(cmd_list, pcmd);
}
else
{
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->texture_id);
glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
}
vtx_offset += pcmd->vtx_count;
}
}
#undef OFFSETOF
// Restore modified state
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glPopAttrib();
}
static const char* ImGui_ImplGlfw_GetClipboardText()
{
return glfwGetClipboardString(g_Window);
}
static void ImGui_ImplGlfw_SetClipboardText(const char* text)
{
glfwSetClipboardString(g_Window, text);
}
void ImGui_ImplGlfw_MouseButtonCallback(GLFWwindow* window, int button, int action, int mods)
{
if (action == GLFW_PRESS && button >= 0 && button < 3)
g_MousePressed[button] = true;
}
void ImGui_ImplGlfw_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset)
{
g_MouseWheel += (float)yoffset; // Use fractional mouse wheel, 1.0 unit 5 lines.
}
void ImGui_ImplGlFw_KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
ImGuiIO& io = ImGui::GetIO();
if (action == GLFW_PRESS)
io.KeysDown[key] = true;
if (action == GLFW_RELEASE)
io.KeysDown[key] = false;
io.KeyCtrl = (mods & GLFW_MOD_CONTROL) != 0;
io.KeyShift = (mods & GLFW_MOD_SHIFT) != 0;
}
void ImGui_ImplGlfw_CharCallback(GLFWwindow* window, unsigned int c)
{
ImGuiIO& io = ImGui::GetIO();
if (c > 0 && c < 0x10000)
io.AddInputCharacter((unsigned short)c);
}
bool ImGui_ImplGlfw_CreateDeviceObjects()
{
ImGuiIO& io = ImGui::GetIO();
// Build texture
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsAlpha8(&pixels, &width, &height);
// Create texture
glGenTextures(1, &g_FontTexture);
glBindTexture(GL_TEXTURE_2D, g_FontTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, pixels);
// Store our identifier
io.Fonts->TexID = (void *)(intptr_t)g_FontTexture;
return true;
}
void ImGui_ImplGlfw_InvalidateDeviceObjects()
{
if (g_FontTexture)
{
glDeleteTextures(1, &g_FontTexture);
ImGui::GetIO().Fonts->TexID = 0;
g_FontTexture = 0;
}
}
bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks)
{
g_Window = window;
ImGuiIO& io = ImGui::GetIO();
io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
io.KeyMap[ImGuiKey_DownArrow] = GLFW_KEY_DOWN;
io.KeyMap[ImGuiKey_Home] = GLFW_KEY_HOME;
io.KeyMap[ImGuiKey_End] = GLFW_KEY_END;
io.KeyMap[ImGuiKey_Delete] = GLFW_KEY_DELETE;
io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;
io.KeyMap[ImGuiKey_V] = GLFW_KEY_V;
io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
io.RenderDrawListsFn = ImGui_ImplGlfw_RenderDrawLists;
io.SetClipboardTextFn = ImGui_ImplGlfw_SetClipboardText;
io.GetClipboardTextFn = ImGui_ImplGlfw_GetClipboardText;
#ifdef _MSC_VER
io.ImeWindowHandle = glfwGetWin32Window(g_Window);
#endif
if (install_callbacks)
{
glfwSetMouseButtonCallback(window, ImGui_ImplGlfw_MouseButtonCallback);
glfwSetScrollCallback(window, ImGui_ImplGlfw_ScrollCallback);
glfwSetKeyCallback(window, ImGui_ImplGlFw_KeyCallback);
glfwSetCharCallback(window, ImGui_ImplGlfw_CharCallback);
}
return true;
}
void ImGui_ImplGlfw_Shutdown()
{
ImGui_ImplGlfw_InvalidateDeviceObjects();
ImGui::Shutdown();
}
void ImGui_ImplGlfw_NewFrame()
{
if (!g_FontTexture)
ImGui_ImplGlfw_CreateDeviceObjects();
ImGuiIO& io = ImGui::GetIO();
// Setup display size (every frame to accommodate for window resizing)
int w, h;
int display_w, display_h;
glfwGetWindowSize(g_Window, &w, &h);
glfwGetFramebufferSize(g_Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)display_w, (float)display_h);
// Setup time step
double current_time = glfwGetTime();
io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f/60.0f);
g_Time = current_time;
// Setup inputs
// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
double mouse_x, mouse_y;
glfwGetCursorPos(g_Window, &mouse_x, &mouse_y);
mouse_x *= (float)display_w / w; // Convert mouse coordinates to pixels
mouse_y *= (float)display_h / h;
io.MousePos = ImVec2((float)mouse_x, (float)mouse_y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
for (int i = 0; i < 3; i++)
{
io.MouseDown[i] = g_MousePressed[i] || glfwGetMouseButton(g_Window, i) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
g_MousePressed[i] = false;
}
io.MouseWheel = g_MouseWheel;
g_MouseWheel = 0.0f;
// Start the frame
ImGui::NewFrame();
}

20
examples/opengl_example/imgui_impl_glfw.h Normal file
View File

@ -0,0 +1,20 @@
// ImGui GLFW binding with OpenGL
// https://github.com/ocornut/imgui
struct GLFWwindow;
bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks);
void ImGui_ImplGlfw_Shutdown();
void ImGui_ImplGlfw_NewFrame();
// Use if you want to reset your rendering device without losing ImGui state.
void ImGui_ImplGlfw_InvalidateDeviceObjects();
bool ImGui_ImplGlfw_CreateDeviceObjects();
// GLFW callbacks (installed by default if you enable 'install_callbacks' during initialization)
// Provided here if you want to chain callbacks.
// You can also handle inputs yourself and use those as a reference.
void ImGui_ImplGlfw_MouseButtonCallback(GLFWwindow* window, int button, int action, int mods);
void ImGui_ImplGlfw_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset);
void ImGui_ImplGlFw_KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods);
void ImGui_ImplGlfw_CharCallback(GLFWwindow* window, unsigned int c);

252
examples/opengl_example/main.cpp
View File

@ -1,256 +1,42 @@
// ImGui - standalone example application for OpenGL 2, using fixed pipeline
// ImGui - standalone example application for Glfw + OpenGL 2, using fixed pipeline
#ifdef _MSC_VER
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#endif
#ifdef __clang__
#pragma clang diagnostic ignored "-Wunused-function" // warning: unused function
#endif
#include "../../imgui.h"
#include <imgui.h>
#include "imgui_impl_glfw.h"
#include <stdio.h>
// GLFW
#include <GLFW/glfw3.h>
#ifdef _MSC_VER
#undef APIENTRY
#define GLFW_EXPOSE_NATIVE_WIN32
#define GLFW_EXPOSE_NATIVE_WGL
#include <GLFW/glfw3native.h>
#endif
static GLFWwindow* window;
static bool mousePressed[2] = { false, false };
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
static void error_callback(int error, const char* description)
{
if (cmd_lists_count == 0)
return;
// We are using the OpenGL fixed pipeline to make the example code simpler to read!
// A probable faster way to render would be to collate all vertices from all cmd_lists into a single vertex buffer.
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers.
glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glEnable(GL_SCISSOR_TEST);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glEnable(GL_TEXTURE_2D);
// Setup orthographic projection matrix
const float width = ImGui::GetIO().DisplaySize.x;
const float height = ImGui::GetIO().DisplaySize.y;
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0f, width, height, 0.0f, -1.0f, +1.0f);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
// Render command lists
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->vtx_buffer.front();
glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, pos)));
glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, uv)));
glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, col)));
int vtx_offset = 0;
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->texture_id);
glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
vtx_offset += pcmd->vtx_count;
}
}
// Restore modified state
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glPopAttrib();
fprintf(stderr, "Error: %s\n", description);
}
// NB: ImGui already provide OS clipboard support for Windows so this isn't needed if you are using Windows only.
static const char* ImImpl_GetClipboardTextFn()
int main(int argc, char** argv)
{
return glfwGetClipboardString(window);
}
static void ImImpl_SetClipboardTextFn(const char* text)
{
glfwSetClipboardString(window, text);
}
// GLFW callbacks
static void glfw_error_callback(int error, const char* description)
{
fputs(description, stderr);
}
static void glfw_mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
{
if (action == GLFW_PRESS && button >= 0 && button < 2)
mousePressed[button] = true;
}
static void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
{
ImGuiIO& io = ImGui::GetIO();
io.MouseWheel += (float)yoffset; // Use fractional mouse wheel, 1.0 unit 5 lines.
}
static void glfw_key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
ImGuiIO& io = ImGui::GetIO();
if (action == GLFW_PRESS)
io.KeysDown[key] = true;
if (action == GLFW_RELEASE)
io.KeysDown[key] = false;
io.KeyCtrl = (mods & GLFW_MOD_CONTROL) != 0;
io.KeyShift = (mods & GLFW_MOD_SHIFT) != 0;
}
static void glfw_char_callback(GLFWwindow* window, unsigned int c)
{
if (c > 0 && c < 0x10000)
ImGui::GetIO().AddInputCharacter((unsigned short)c);
}
void InitGL()
{
glfwSetErrorCallback(glfw_error_callback);
// Setup window
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(1);
window = glfwCreateWindow(1280, 720, "ImGui OpenGL2 example", NULL, NULL);
GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui OpenGL2 example", NULL, NULL);
glfwMakeContextCurrent(window);
glfwSetKeyCallback(window, glfw_key_callback);
glfwSetMouseButtonCallback(window, glfw_mouse_button_callback);
glfwSetScrollCallback(window, glfw_scroll_callback);
glfwSetCharCallback(window, glfw_char_callback);
}
void LoadFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
// Setup ImGui binding
ImGui_ImplGlfw_Init(window, true);
//ImGuiIO& io = ImGui::GetIO();
//ImFont* my_font1 = io.Fonts->AddFontDefault();
//ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("extra_fonts/Karla-Regular.ttf", 15.0f);
//ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
//ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsAlpha8(&pixels, &width, &height);
GLuint tex_id;
glGenTextures(1, &tex_id);
glBindTexture(GL_TEXTURE_2D, tex_id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, pixels);
// Store our identifier
io.Fonts->TexID = (void *)(intptr_t)tex_id;
}
void InitImGui()
{
ImGuiIO& io = ImGui::GetIO();
io.DeltaTime = 1.0f/60.0f; // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our time step is variable)
io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
io.KeyMap[ImGuiKey_DownArrow] = GLFW_KEY_DOWN;
io.KeyMap[ImGuiKey_Home] = GLFW_KEY_HOME;
io.KeyMap[ImGuiKey_End] = GLFW_KEY_END;
io.KeyMap[ImGuiKey_Delete] = GLFW_KEY_DELETE;
io.KeyMap[ImGuiKey_Backspace] = GLFW_KEY_BACKSPACE;
io.KeyMap[ImGuiKey_Enter] = GLFW_KEY_ENTER;
io.KeyMap[ImGuiKey_Escape] = GLFW_KEY_ESCAPE;
io.KeyMap[ImGuiKey_A] = GLFW_KEY_A;
io.KeyMap[ImGuiKey_C] = GLFW_KEY_C;
io.KeyMap[ImGuiKey_V] = GLFW_KEY_V;
io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
io.RenderDrawListsFn = ImImpl_RenderDrawLists;
io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
#ifdef _MSC_VER
io.ImeWindowHandle = glfwGetWin32Window(window);
#endif
LoadFontsTexture();
}
void UpdateImGui()
{
ImGuiIO& io = ImGui::GetIO();
// Setup resolution (every frame to accommodate for window resizing)
int w, h;
int display_w, display_h;
glfwGetWindowSize(window, &w, &h);
glfwGetFramebufferSize(window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)display_w, (float)display_h); // Display size, in pixels. For clamping windows positions.
// Setup time step
static double time = 0.0f;
const double current_time = glfwGetTime();
io.DeltaTime = (float)(current_time - time);
time = current_time;
// Setup inputs
// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
double mouse_x, mouse_y;
glfwGetCursorPos(window, &mouse_x, &mouse_y);
mouse_x *= (float)display_w / w; // Convert mouse coordinates to pixels
mouse_y *= (float)display_h / h;
io.MousePos = ImVec2((float)mouse_x, (float)mouse_y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
io.MouseDown[0] = mousePressed[0] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
io.MouseDown[1] = mousePressed[1] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;
// Start the frame
ImGui::NewFrame();
}
// Application code
int main(int argc, char** argv)
{
InitGL();
InitImGui();
bool show_test_window = true;
bool show_another_window = false;
ImVec4 clear_col = ImColor(114, 144, 154);
ImVec4 clear_color = ImColor(114, 144, 154);
// Main loop
while (!glfwWindowShouldClose(window))
{
ImGuiIO& io = ImGui::GetIO();
mousePressed[0] = mousePressed[1] = false;
glfwPollEvents();
UpdateImGui();
ImGui_ImplGlfw_NewFrame();
// 1. Show a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
@ -258,7 +44,7 @@ int main(int argc, char** argv)
static float f;
ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
ImGui::ColorEdit3("clear color", (float*)&clear_col);
ImGui::ColorEdit3("clear color", (float*)&clear_color);
if (ImGui::Button("Test Window")) show_test_window ^= 1;
if (ImGui::Button("Another Window")) show_another_window ^= 1;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
@ -280,15 +66,15 @@ int main(int argc, char** argv)
}
// Rendering
glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
glClearColor(clear_col.x, clear_col.y, clear_col.z, clear_col.w);
glViewport(0, 0, (int)ImGui::GetIO().DisplaySize.x, (int)ImGui::GetIO().DisplaySize.y);
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);
ImGui::Render();
glfwSwapBuffers(window);
}
// Cleanup
ImGui::Shutdown();
ImGui_ImplGlfw_Shutdown();
glfwTerminate();
return 0;

8
examples/opengl_example/opengl_example.vcxproj
View File

@ -39,16 +39,18 @@
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<OutDir>$(ProjectDir)$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)$(Configuration)\</IntDir>
<IncludePath>$(IncludePath)</IncludePath>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<OutDir>$(ProjectDir)$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)$(Configuration)\</IntDir>
<IncludePath>$(IncludePath)</IncludePath>
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<AdditionalIncludeDirectories>$(ProjectDir)\glfw\include;$(ProjectDir)\glew\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>$(ProjectDir)\glfw\include;..\..;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -64,7 +66,7 @@
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<AdditionalIncludeDirectories>$(ProjectDir)\glfw\include;$(ProjectDir)\glew\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<AdditionalIncludeDirectories>$(ProjectDir)\glfw\include;..\..;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -79,11 +81,13 @@
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="..\..\imgui.cpp" />
<ClCompile Include="imgui_impl_glfw.cpp" />
<ClCompile Include="main.cpp" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h" />
<ClInclude Include="..\..\imgui.h" />
<ClInclude Include="imgui_impl_glfw.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">

6
examples/opengl_example/opengl_example.vcxproj.filters
View File

@ -16,6 +16,9 @@
<ClCompile Include="..\..\imgui.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="imgui_impl_glfw.cpp">
<Filter>sources</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h">
@ -24,5 +27,8 @@
<ClInclude Include="..\..\imgui.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="imgui_impl_glfw.h">
<Filter>sources</Filter>
</ClInclude>
</ItemGroup>
</Project>

594
imgui.cpp
View File

File diff suppressed because it is too large Load Diff

38
imgui.h
View File

@ -1,4 +1,4 @@
// ImGui library v1.35 wip
// ImGui library v1.35
// See .cpp file for documentation.
// See ImGui::ShowTestWindow() for sample code.
// Read 'Programmer guide' in .cpp for notes on how to setup ImGui in your codebase.
@ -6,17 +6,7 @@
#pragma once
struct ImDrawCmd;
struct ImDrawList;
struct ImFont;
struct ImFontAtlas;
struct ImGuiAabb;
struct ImGuiIO;
struct ImGuiStorage;
struct ImGuiStyle;
struct ImGuiWindow;
#include "imconfig.h"
#include "imconfig.h" // User-editable configuration file
#include <float.h> // FLT_MAX
#include <stdarg.h> // va_list
#include <stddef.h> // ptrdiff_t
@ -34,6 +24,15 @@ struct ImGuiWindow;
#define IMGUI_API
#endif
// Forward declarations
struct ImDrawCmd;
struct ImDrawList;
struct ImFont;
struct ImFontAtlas;
struct ImGuiIO;
struct ImGuiStorage;
struct ImGuiStyle;
typedef unsigned int ImU32;
typedef unsigned short ImWchar; // character for display
typedef void* ImTextureID; // user data to refer to a texture (e.g. store your texture handle/id)
@ -191,6 +190,8 @@ namespace ImGui
IMGUI_API void SetWindowCollapsed(const char* name, bool collapsed, ImGuiSetCond cond = 0); // set named window collapsed state.
IMGUI_API void SetWindowFocus(const char* name); // set named window to be focused / front-most
IMGUI_API float GetScrollPosY(); // get scrolling position (0..GetScrollMaxY())
IMGUI_API float GetScrollMaxY(); // get maximum scrolling position == ContentSize.Y - WindowSize.Y
IMGUI_API void SetScrollPosHere(); // adjust scrolling position to center into the current cursor position.
IMGUI_API void SetKeyboardFocusHere(int offset = 0); // focus keyboard on the next widget. Use positive 'offset' to access sub components of a multiple component widget.
IMGUI_API void SetStateStorage(ImGuiStorage* tree); // replace tree state storage with our own (if you want to manipulate it yourself, typically clear subsection of it).
@ -226,9 +227,11 @@ namespace ImGui
IMGUI_API void Spacing();
IMGUI_API void Columns(int count = 1, const char* id = NULL, bool border=true); // setup number of columns
IMGUI_API void NextColumn(); // next column
IMGUI_API float GetColumnOffset(int column_index = -1);
IMGUI_API void SetColumnOffset(int column_index, float offset);
IMGUI_API float GetColumnWidth(int column_index = -1);
IMGUI_API int GetColumnIndex(); // get current column index
IMGUI_API float GetColumnOffset(int column_index = -1); // get position of column line (in pixels, from the left side of the contents region). pass -1 to use current column, otherwise 0..GetcolumnsCount() inclusive. column 0 is usually 0.0f and not resizable unless you call this.
IMGUI_API void SetColumnOffset(int column_index, float offset_x); // set position of column line (in pixels, from the left side of the contents region). pass -1 to use current column.
IMGUI_API float GetColumnWidth(int column_index = -1); // column width (== GetColumnOffset(GetColumnIndex()+1) - GetColumnOffset(GetColumnOffset())
IMGUI_API int GetColumnsCount(); // number of columns (what was passed to Columns())
IMGUI_API ImVec2 GetCursorPos(); // cursor position is relative to window position
IMGUI_API float GetCursorPosX(); // "
IMGUI_API float GetCursorPosY(); // "
@ -383,7 +386,7 @@ enum ImGuiWindowFlags_
ImGuiWindowFlags_NoTitleBar = 1 << 0, // Disable title-bar
ImGuiWindowFlags_NoResize = 1 << 1, // Disable user resizing with the lower-right grip
ImGuiWindowFlags_NoMove = 1 << 2, // Disable user moving the window
ImGuiWindowFlags_NoScrollbar = 1 << 3, // Disable scroll bar (window can still scroll with mouse or programatically)
ImGuiWindowFlags_NoScrollbar = 1 << 3, // Disable scrollbar (window can still scroll with mouse or programatically)
ImGuiWindowFlags_NoScrollWithMouse = 1 << 4, // Disable user scrolling with mouse wheel
ImGuiWindowFlags_NoCollapse = 1 << 5, // Disable user collapsing window by double-clicking on it
ImGuiWindowFlags_AlwaysAutoResize = 1 << 6, // Resize every window to its content every frame
@ -531,7 +534,8 @@ struct ImGuiStyle
float WindowFillAlphaDefault; // Default alpha of window background, if not specified in ImGui::Begin()
float TreeNodeSpacing; // Horizontal spacing when entering a tree node
float ColumnsMinSpacing; // Minimum horizontal spacing between two columns
float ScrollBarWidth; // Width of the vertical scroll bar
float ScrollbarWidth; // Width of the vertical scrollbar
float GrabMinSize; // Minimum width/height of a slider or scrollbar grab
ImVec4 Colors[ImGuiCol_COUNT];
IMGUI_API ImGuiStyle();