Examples: DirectX11: Removed unnecessary vertices conversion and CUSTOMVERTEX types.

examples/directx11_example/imgui_impl_dx11.cpp

@@ -29,13 +29,6 @@ static ID3D11ShaderResourceView*g_pFontTextureView = NULL;
 static ID3D11BlendState*        g_blendState = NULL;
 static int                      VERTEX_BUFFER_SIZE = 30000;     // TODO: Make vertex buffer smaller and grow dynamically as needed.
 
-struct CUSTOMVERTEX
-{
-    float        pos[2];
-    float        uv[2];
-    unsigned int col;
-};
-
 struct VERTEX_CONSTANT_BUFFER
 {
     float        mvp[4][4];
@@ -50,21 +43,13 @@ static void ImGui_ImplDX11_RenderDrawLists(ImDrawList** const cmd_lists, int cmd
     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;
+    ImDrawVert* vtx_dst = (ImDrawVert*)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++;
-        }
+        memcpy(vtx_dst, vtx_src, cmd_list->vtx_buffer.size() * sizeof(ImDrawVert));
+        vtx_dst += cmd_list->vtx_buffer.size();
     }
     g_pd3dDeviceContext->Unmap(g_pVB, 0);
 
@@ -104,7 +89,7 @@ static void ImGui_ImplDX11_RenderDrawLists(ImDrawList** const cmd_lists, int cmd
     }
 
     // Bind shader and vertex buffers
-    unsigned int stride = sizeof(CUSTOMVERTEX);
+    unsigned int stride = sizeof(ImDrawVert);
     unsigned int offset = 0;
     g_pd3dDeviceContext->IASetInputLayout(g_pInputLayout);
     g_pd3dDeviceContext->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
@@ -293,9 +278,9 @@ bool    ImGui_ImplDX11_CreateDeviceObjects()
 
         // 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 },
+            { "POSITION", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, (size_t)(&((ImDrawVert*)0)->pos), D3D11_INPUT_PER_VERTEX_DATA, 0 },
+            { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT,       0, (size_t)(&((ImDrawVert*)0)->uv),  D3D11_INPUT_PER_VERTEX_DATA, 0 },
+            { "COLOR",    0, DXGI_FORMAT_R8G8B8A8_UNORM,     0, (size_t)(&((ImDrawVert*)0)->col), D3D11_INPUT_PER_VERTEX_DATA, 0 },
         };
 
         if (g_pd3dDevice->CreateInputLayout(localLayout, 3, g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pInputLayout) != S_OK)
@@ -359,7 +344,7 @@ bool    ImGui_ImplDX11_CreateDeviceObjects()
         D3D11_BUFFER_DESC bufferDesc;
         memset(&bufferDesc, 0, sizeof(D3D11_BUFFER_DESC));
         bufferDesc.Usage = D3D11_USAGE_DYNAMIC;
-        bufferDesc.ByteWidth = VERTEX_BUFFER_SIZE * sizeof(CUSTOMVERTEX);
+        bufferDesc.ByteWidth = VERTEX_BUFFER_SIZE * sizeof(ImDrawVert);
         bufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
         bufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
         bufferDesc.MiscFlags = 0;