Drezil/imgui
1
0
Fork 0
mirror of https://github.com/Drezil/imgui.git synced 2025-07-12 15:59:54 +02:00
Code Issues Packages Projects Releases Wiki Activity

Examples: DirectX11 example application handles window resizing.

Browse Source
This commit is contained in:
ocornut
2015-03-09 14:51:10 +00:00
parent 866fa95aaa
commit 66a5837ba8
3 changed files with 119 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

141
examples/directx11_example/imgui_impl_dx11.cpp
View File

@ -13,7 +13,6 @@
// Data
static INT64 g_Time = 0;
static INT64 g_TicksPerSecond = 0;
static bool g_FontTextureLoaded = false;
static HWND g_hWnd = 0;
static ID3D11Device* g_pd3dDevice = NULL;
@ -26,6 +25,7 @@ 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
@ -180,7 +180,7 @@ LRESULT ImGui_ImplDX11_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM
return 0;
}
void ImGui_ImplDX11_InitFontsTexture()
static void ImGui_ImplDX11_InitFontsTexture()
{
ImGuiIO& io = ImGui::GetIO();
@ -190,55 +190,63 @@ void ImGui_ImplDX11_InitFontsTexture()
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;
{
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);
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;
ID3D11ShaderResourceView* font_texture_view = NULL;
g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &font_texture_view);
pTexture->Release();
// 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 *)font_texture_view;
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);
{
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);
}
}
static bool InitDirect3DState()
bool ImGui_ImplDX11_CreateDeviceObjects()
{
if (!g_pd3dDevice)
return false;
if (g_pVB)
ImGui_ImplDX11_InvalidateDeviceObjects();
// Create the vertex shader
{
static const char* vertexShader =
@ -351,21 +359,35 @@ static bool InitDirect3DState()
return false;
}
ImGui_ImplDX11_InitFontsTexture();
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 (!InitDirect3DState())
{
IM_ASSERT(0);
return false;
}
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond))
return false;
if (!QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
@ -398,28 +420,17 @@ bool ImGui_ImplDX11_Init(void* hwnd, ID3D11Device* device, ID3D11DeviceContex
void ImGui_ImplDX11_Shutdown()
{
if (g_pd3dDeviceContext) g_pd3dDeviceContext->ClearState();
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();
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();
ImGui_ImplDX11_InvalidateDeviceObjects();
ImGui::Shutdown();
g_pd3dDevice = NULL;
g_pd3dDeviceContext = NULL;
g_hWnd = (HWND)0;
}
void ImGui_ImplDX11_NewFrame()
{
if (!g_FontTextureLoaded)
ImGui_ImplDX11_InitFontsTexture();
if (!g_pVB)
ImGui_ImplDX11_CreateDeviceObjects();
ImGuiIO& io = ImGui::GetIO();