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Examples: all supports TextureID in renderer, added LoadFontTexture() function.

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This commit is contained in:
ocornut 2015-01-11 17:17:43 +00:00
parent 40f7b67ef1
commit 20bb6270bc
4 changed files with 129 additions and 83 deletions
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84
examples/directx11_example/main.cpp
View File

@ -26,7 +26,6 @@ static ID3D11Buffer* g_pVertexConstantBuffer = NULL;
static ID3D10Blob * g_pPixelShaderBlob = NULL; static ID3D10Blob * g_pPixelShaderBlob = NULL;
static ID3D11PixelShader* g_pPixelShader = NULL; static ID3D11PixelShader* g_pPixelShader = NULL;
static ID3D11ShaderResourceView*g_pFontTextureView = NULL;
static ID3D11SamplerState* g_pFontSampler = NULL; static ID3D11SamplerState* g_pFontSampler = NULL;
static ID3D11BlendState* g_blendState = NULL; static ID3D11BlendState* g_blendState = NULL;
@ -122,7 +121,6 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
g_pd3dDeviceImmediateContext->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer); g_pd3dDeviceImmediateContext->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
g_pd3dDeviceImmediateContext->PSSetShader(g_pPixelShader, NULL, 0); g_pd3dDeviceImmediateContext->PSSetShader(g_pPixelShader, NULL, 0);
g_pd3dDeviceImmediateContext->PSSetShaderResources(0, 1, &g_pFontTextureView);
g_pd3dDeviceImmediateContext->PSSetSamplers(0, 1, &g_pFontSampler); g_pd3dDeviceImmediateContext->PSSetSamplers(0, 1, &g_pFontSampler);
// Setup render state // Setup render state
@ -139,6 +137,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
{ {
const ImDrawCmd* pcmd = &cmd_list->commands[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 }; 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->RSSetScissorRects(1, &r);
g_pd3dDeviceImmediateContext->Draw(pcmd->vtx_count, vtx_offset); g_pd3dDeviceImmediateContext->Draw(pcmd->vtx_count, vtx_offset);
vtx_offset += pcmd->vtx_count; vtx_offset += pcmd->vtx_count;
@ -324,7 +323,8 @@ void CleanupDevice()
// InitImGui // InitImGui
if (g_pFontSampler) g_pFontSampler->Release(); if (g_pFontSampler) g_pFontSampler->Release();
if (g_pFontTextureView) g_pFontTextureView->Release(); if (ID3D11ShaderResourceView* font_texture_view = (ID3D11ShaderResourceView*)ImGui::GetIO().Font->TexID)
font_texture_view->Release();
if (g_pVB) g_pVB->Release(); if (g_pVB) g_pVB->Release();
// InitDeviceD3D // InitDeviceD3D
@ -379,6 +379,45 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
return DefWindowProc(hWnd, msg, wParam, lParam); return DefWindowProc(hWnd, msg, wParam, lParam);
} }
void LoadFontTexture(ImFont* font)
{
IM_ASSERT(font && font->IsLoaded());
// Create texture
D3D11_TEXTURE2D_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.Width = font->TexWidth;
desc.Height = font->TexHeight;
desc.MipLevels = 1;
desc.ArraySize = 1;
desc.Format = DXGI_FORMAT_A8_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 = font->TexPixels;
subResource.SysMemPitch = desc.Width * 1;
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_A8_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 ID
font->TexID = (void *)font_texture_view;
}
void InitImGui() void InitImGui()
{ {
RECT rect; RECT rect;
@ -430,39 +469,7 @@ void InitImGui()
io.Font->LoadDefault(); io.Font->LoadDefault();
//io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault()); //io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault());
//io.Font->DisplayOffset.y += 0.0f; //io.Font->DisplayOffset.y += 0.0f;
IM_ASSERT(io.Font->IsLoaded()); LoadFontTexture(io.Font);
// Copy font texture
{
D3D11_TEXTURE2D_DESC desc;
ZeroMemory(&desc, sizeof(desc));
desc.Width = io.Font->TexWidth;
desc.Height = io.Font->TexHeight;
desc.MipLevels = 1;
desc.ArraySize = 1;
desc.Format = DXGI_FORMAT_A8_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 = io.Font->TexPixels;
subResource.SysMemPitch = desc.Width * 1;
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_A8_UNORM;
srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
srvDesc.Texture2D.MipLevels = desc.MipLevels;
srvDesc.Texture2D.MostDetailedMip = 0;
g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &g_pFontTextureView);
pTexture->Release();
}
// Create texture sampler // Create texture sampler
{ {
@ -563,6 +570,11 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
show_test_window ^= ImGui::Button("Test Window"); show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window"); show_another_window ^= ImGui::Button("Another Window");
static ImFont* font2 = NULL;
if (!font2) { font2 = new ImFont(); font2->LoadFromFileTTF("../../extra_fonts/ArialUni.ttf", 30.0f); LoadFontTexture(font2); }
ImGui::Image(font2->TexID, ImVec2((float)font2->TexWidth, (FLOAT)font2->TexHeight));
//ImGui::GetWindowDrawList()->AddText(font2, 30.0f, ImGui::GetCursorScreenPos(), 0xFFFFFFFF, "Another font");
// Calculate and show frame rate // Calculate and show frame rate
static float ms_per_frame[120] = { 0 }; static float ms_per_frame[120] = { 0 };
static int ms_per_frame_idx = 0; static int ms_per_frame_idx = 0;

52
examples/directx9_example/main.cpp
View File

@ -14,7 +14,6 @@ static HWND hWnd;
static LPDIRECT3D9 g_pD3D = NULL; // Used to create the D3DDevice static LPDIRECT3D9 g_pD3D = NULL; // Used to create the D3DDevice
static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; // Our rendering device static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; // Our rendering device
static LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; // Buffer to hold vertices static LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; // Buffer to hold vertices
static LPDIRECT3DTEXTURE9 g_pTexture = NULL; // Our texture
struct CUSTOMVERTEX struct CUSTOMVERTEX
{ {
D3DXVECTOR3 pos; D3DXVECTOR3 pos;
@ -70,16 +69,13 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
g_pd3dDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA ); g_pd3dDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );
g_pd3dDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA ); g_pd3dDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA );
g_pd3dDevice->SetRenderState( D3DRS_SCISSORTESTENABLE, true ); g_pd3dDevice->SetRenderState( D3DRS_SCISSORTESTENABLE, true );
// Setup texture
g_pd3dDevice->SetTexture( 0, g_pTexture );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 ); g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_DIFFUSE ); g_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_DIFFUSE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE ); g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE ); g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE ); g_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR ); g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_POINT );
g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR ); g_pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_POINT );
// Setup orthographic projection matrix // Setup orthographic projection matrix
D3DXMATRIXA16 mat; D3DXMATRIXA16 mat;
@ -99,6 +95,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
{ {
const ImDrawCmd* pcmd = &cmd_list->commands[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 }; 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->SetScissorRect(&r);
g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_offset, pcmd->vtx_count/3); g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_offset, pcmd->vtx_count/3);
vtx_offset += pcmd->vtx_count; vtx_offset += pcmd->vtx_count;
@ -133,7 +130,8 @@ void CleanupDevice()
if (g_pVB) g_pVB->Release(); if (g_pVB) g_pVB->Release();
// InitDeviceD3D // InitDeviceD3D
if (g_pTexture) g_pTexture->Release(); if (LPDIRECT3DTEXTURE9 tex = (LPDIRECT3DTEXTURE9)ImGui::GetIO().Font->TexID)
tex->Release();
if (g_pd3dDevice) g_pd3dDevice->Release(); if (g_pd3dDevice) g_pd3dDevice->Release();
if (g_pD3D) g_pD3D->Release(); if (g_pD3D) g_pD3D->Release();
} }
@ -176,6 +174,31 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
return DefWindowProc(hWnd, msg, wParam, lParam); return DefWindowProc(hWnd, msg, wParam, lParam);
} }
void LoadFontTexture(ImFont* font)
{
IM_ASSERT(font && font->IsLoaded());
LPDIRECT3DTEXTURE9 pTexture = NULL;
if (D3DXCreateTexture(g_pd3dDevice, font->TexWidth, font->TexHeight, 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 < font->TexHeight; y++)
memcpy((unsigned char *)tex_locked_rect.pBits + tex_locked_rect.Pitch * y, font->TexPixels + font->TexWidth * y, font->TexWidth);
pTexture->UnlockRect(0);
font->TexID = (void *)pTexture;
}
void InitImGui() void InitImGui()
{ {
RECT rect; RECT rect;
@ -219,15 +242,7 @@ void InitImGui()
io.Font->LoadDefault(); io.Font->LoadDefault();
//io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault()); //io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault());
//io.Font->DisplayOffset.y += 0.0f; //io.Font->DisplayOffset.y += 0.0f;
IM_ASSERT(io.Font->IsLoaded()); LoadFontTexture(io.Font);
// Copy font texture
if (D3DXCreateTexture(g_pd3dDevice, io.Font->TexWidth, io.Font->TexHeight, 1, D3DUSAGE_DYNAMIC, D3DFMT_A8, D3DPOOL_DEFAULT, &g_pTexture) < 0) { IM_ASSERT(0); return; }
D3DLOCKED_RECT tex_locked_rect;
if (g_pTexture->LockRect(0, &tex_locked_rect, NULL, 0) != D3D_OK) { IM_ASSERT(0); return; }
for (int y = 0; y < io.Font->TexHeight; y++)
memcpy((unsigned char *)tex_locked_rect.pBits + tex_locked_rect.Pitch * y, io.Font->TexPixels + io.Font->TexWidth * y, io.Font->TexWidth);
g_pTexture->UnlockRect(0);
} }
INT64 ticks_per_second = 0; INT64 ticks_per_second = 0;
@ -313,6 +328,11 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
show_test_window ^= ImGui::Button("Test Window"); show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window"); show_another_window ^= ImGui::Button("Another Window");
static ImFont* font2 = NULL;
if (!font2) { font2 = new ImFont(); font2->LoadFromFileTTF("../../extra_fonts/ArialUni.ttf", 30.0f); LoadFontTexture(font2); }
ImGui::Image(font2->TexID, ImVec2((float)font2->TexWidth, (FLOAT)font2->TexHeight));
//ImGui::GetWindowDrawList()->AddText(font2, 30.0f, ImGui::GetCursorScreenPos(), 0xFFFFFFFF, "Another font");
// Calculate and show frame rate // Calculate and show frame rate
static float ms_per_frame[120] = { 0 }; static float ms_per_frame[120] = { 0 };
static int ms_per_frame_idx = 0; static int ms_per_frame_idx = 0;

33
examples/opengl3_example/main.cpp
View File

@ -17,7 +17,6 @@
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT)) #define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
static GLFWwindow* window; static GLFWwindow* window;
static GLuint fontTex;
static bool mousePressed[2] = { false, false }; static bool mousePressed[2] = { false, false };
// Shader variables // Shader variables
@ -43,10 +42,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
glDisable(GL_CULL_FACE); glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST); glDisable(GL_DEPTH_TEST);
glEnable(GL_SCISSOR_TEST); glEnable(GL_SCISSOR_TEST);
// Setup texture
glActiveTexture(GL_TEXTURE0); glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, fontTex);
// Setup orthographic projection matrix // Setup orthographic projection matrix
const float width = ImGui::GetIO().DisplaySize.x; const float width = ImGui::GetIO().DisplaySize.x;
@ -96,6 +92,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
const ImDrawCmd* pcmd_end = cmd_list->commands.end(); const ImDrawCmd* pcmd_end = cmd_list->commands.end();
for (const ImDrawCmd* pcmd = cmd_list->commands.begin(); pcmd != pcmd_end; pcmd++) for (const ImDrawCmd* pcmd = cmd_list->commands.begin(); pcmd != pcmd_end; pcmd++)
{ {
glBindTexture(GL_TEXTURE_2D, (GLuint)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)); 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); glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
vtx_offset += pcmd->vtx_count; vtx_offset += pcmd->vtx_count;
@ -242,6 +239,19 @@ void InitGL()
glBindBuffer(GL_ARRAY_BUFFER, 0); glBindBuffer(GL_ARRAY_BUFFER, 0);
} }
void LoadFontTexture(ImFont* font)
{
IM_ASSERT(font && font->IsLoaded());
GLuint tex_id;
glGenTextures(1, &tex_id);
glBindTexture(GL_TEXTURE_2D, tex_id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, font->TexWidth, font->TexHeight, 0, GL_RED, GL_UNSIGNED_BYTE, font->TexPixels);
font->TexID = (void *)tex_id;
}
void InitImGui() void InitImGui()
{ {
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
@ -274,15 +284,7 @@ void InitImGui()
io.Font->LoadDefault(); io.Font->LoadDefault();
//io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault()); //io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault());
//io.Font->DisplayOffset.y += 0.0f; //io.Font->DisplayOffset.y += 0.0f;
IM_ASSERT(io.Font->IsLoaded()); LoadFontTexture(io.Font);
// Copy font texture
glGenTextures(1, &fontTex);
glBindTexture(GL_TEXTURE_2D, fontTex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
IM_ASSERT(io.Font->IsLoaded());
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, io.Font->TexWidth, io.Font->TexHeight, 0, GL_RED, GL_UNSIGNED_BYTE, io.Font->TexPixels);
} }
void UpdateImGui() void UpdateImGui()
@ -342,6 +344,11 @@ int main(int argc, char** argv)
show_test_window ^= ImGui::Button("Test Window"); show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window"); show_another_window ^= ImGui::Button("Another Window");
static ImFont* font2 = NULL;
if (!font2) { font2 = new ImFont(); font2->LoadFromFileTTF("../../extra_fonts/ArialUni.ttf", 30.0f); LoadFontTexture(font2); }
ImGui::Image(font2->TexID, ImVec2((float)font2->TexWidth, (float)font2->TexHeight));
//ImGui::GetWindowDrawList()->AddText(font2, 30.0f, ImGui::GetCursorScreenPos(), 0xFFFFFFFF, "Another font");
// Calculate and show frame rate // Calculate and show frame rate
static float ms_per_frame[120] = { 0 }; static float ms_per_frame[120] = { 0 };
static int ms_per_frame_idx = 0; static int ms_per_frame_idx = 0;

33
examples/opengl_example/main.cpp
View File

@ -17,7 +17,6 @@
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT)) #define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
static GLFWwindow* window; static GLFWwindow* window;
static GLuint fontTex;
static bool mousePressed[2] = { false, false }; static bool mousePressed[2] = { false, false };
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure) // This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
@ -41,9 +40,6 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_COLOR_ARRAY); glEnableClientState(GL_COLOR_ARRAY);
// Setup texture
glBindTexture(GL_TEXTURE_2D, fontTex);
glEnable(GL_TEXTURE_2D); glEnable(GL_TEXTURE_2D);
// Setup orthographic projection matrix // Setup orthographic projection matrix
@ -70,6 +66,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++) for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
{ {
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i]; const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
glBindTexture(GL_TEXTURE_2D, (GLuint)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)); 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); glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
vtx_offset += pcmd->vtx_count; vtx_offset += pcmd->vtx_count;
@ -151,6 +148,19 @@ void InitGL()
glewInit(); glewInit();
} }
void LoadFontTexture(ImFont* font)
{
IM_ASSERT(font && font->IsLoaded());
GLuint tex_id;
glGenTextures(1, &tex_id);
glBindTexture(GL_TEXTURE_2D, tex_id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, font->TexWidth, font->TexHeight, 0, GL_ALPHA, GL_UNSIGNED_BYTE, font->TexPixels);
font->TexID = (void *)tex_id;
}
void InitImGui() void InitImGui()
{ {
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
@ -183,15 +193,7 @@ void InitImGui()
io.Font->LoadDefault(); io.Font->LoadDefault();
//io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault()); //io.Font->LoadFromFileTTF("myfont.ttf", font_size_px, ImFont::GetGlyphRangesDefault());
//io.Font->DisplayOffset.y += 0.0f; //io.Font->DisplayOffset.y += 0.0f;
IM_ASSERT(io.Font->IsLoaded()); LoadFontTexture(io.Font);
// Copy font texture
glGenTextures(1, &fontTex);
glBindTexture(GL_TEXTURE_2D, fontTex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
IM_ASSERT(io.Font->IsLoaded());
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, io.Font->TexWidth, io.Font->TexHeight, 0, GL_ALPHA, GL_UNSIGNED_BYTE, io.Font->TexPixels);
} }
void UpdateImGui() void UpdateImGui()
@ -250,6 +252,11 @@ int main(int argc, char** argv)
show_test_window ^= ImGui::Button("Test Window"); show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window"); show_another_window ^= ImGui::Button("Another Window");
static ImFont* font2 = NULL;
if (!font2) { font2 = new ImFont(); font2->LoadFromFileTTF("../../extra_fonts/ArialUni.ttf", 30.0f); LoadFontTexture(font2); }
ImGui::Image(font2->TexID, ImVec2((float)font2->TexWidth, (float)font2->TexHeight));
//ImGui::GetWindowDrawList()->AddText(font2, 30.0f, ImGui::GetCursorScreenPos(), 0xFFFFFFFF, "Another font");
// Calculate and show frame rate // Calculate and show frame rate
static float ms_per_frame[120] = { 0 }; static float ms_per_frame[120] = { 0 };
static int ms_per_frame_idx = 0; static int ms_per_frame_idx = 0;