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Backends: DX9, DX10, DX11, DX12, Allegro5, OpenGL2, OpenGL3, SDLRenderer2, SDLRenderer3, SDLGPU3, Vulkan: added standard draw callbacks when possible. (#9378)

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This commit is contained in:
omar
2026-04-23 21:50:45 +02:00
committed by ocornut
parent 82f46a73f8
commit 0a811e8ea1
19 changed files with 244 additions and 45 deletions
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backends/imgui_impl_dx11.cpp
+15 -4
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@@ -17,6 +17,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-XX-XX: DirectX11: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest, DrawCallback_SetSamplerCustom.
// 2026-01-19: DirectX11: Added 'SamplerNearest' in ImGui_ImplDX11_RenderState. Renamed 'SamplerDefault' to 'SamplerLinear'.
// 2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
// 2025-06-11: DirectX11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas.
@@ -85,6 +86,7 @@ struct ImGui_ImplDX11_Data
ID3D11DepthStencilState* pDepthStencilState;
int VertexBufferSize;
int IndexBufferSize;
ImGui_ImplDX11_RenderState* RenderState; // == (ImGui_ImplDX11_RenderState*)ImGui::GetPlatformIO().Renderer_RenderState during rendering.
ImGui_ImplDX11_Data() { memset((void*)this, 0, sizeof(*this)); VertexBufferSize = 5000; IndexBufferSize = 10000; }
};
@@ -159,6 +161,12 @@ static void ImGui_ImplDX11_SetupRenderState(const ImDrawData* draw_data, ID3D11D
device_ctx->RSSetState(bd->pRasterizerState);
}
// Draw callbacks
static void ImGui_ImplDX11_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*) {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
static void ImGui_ImplDX11_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*) { ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); bd->RenderState->DeviceContext->PSSetSamplers(0, 1, &bd->pTexSamplerLinear); }
static void ImGui_ImplDX11_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*) { ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); bd->RenderState->DeviceContext->PSSetSamplers(0, 1, &bd->pTexSamplerNearest); }
static void ImGui_ImplDX11_DrawCallback_SetSamplerCustom(const ImDrawList*, const ImDrawCmd* cmd) { ImGui_ImplDX11_Data* bd = ImGui_ImplDX11_GetBackendData(); ID3D11SamplerState* sampler = (ID3D11SamplerState*)cmd->UserCallbackData; bd->RenderState->DeviceContext->PSSetSamplers(0, 1, &sampler); }
// Render function
void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
{
@@ -277,7 +285,7 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
render_state.SamplerLinear = bd->pTexSamplerLinear;
render_state.SamplerNearest = bd->pTexSamplerNearest;
render_state.VertexConstantBuffer = bd->pVertexConstantBuffer;
platform_io.Renderer_RenderState = &render_state;
platform_io.Renderer_RenderState = bd->RenderState = &render_state;
// Render command lists
// (Because we merged all buffers into a single one, we maintain our own offset into them)
@@ -293,8 +301,7 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
if (pcmd->UserCallback != nullptr)
{
// User callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
if (pcmd->UserCallback == ImGui_ImplDX11_DrawCallback_ResetRenderState)
ImGui_ImplDX11_SetupRenderState(draw_data, device);
else
pcmd->UserCallback(draw_list, pcmd);
@@ -320,7 +327,7 @@ void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
global_idx_offset += draw_list->IdxBuffer.Size;
global_vtx_offset += draw_list->VtxBuffer.Size;
}
platform_io.Renderer_RenderState = nullptr;
platform_io.Renderer_RenderState = bd->RenderState = nullptr;
// Restore modified DX state
device->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);
@@ -629,6 +636,10 @@ bool ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_co
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
platform_io.Renderer_TextureMaxWidth = platform_io.Renderer_TextureMaxHeight = D3D11_REQ_TEXTURE2D_U_OR_V_DIMENSION;
platform_io.DrawCallback_ResetRenderState = ImGui_ImplDX11_DrawCallback_ResetRenderState;
platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplDX11_DrawCallback_SetSamplerLinear;
platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplDX11_DrawCallback_SetSamplerNearest;
platform_io.DrawCallback_SetSamplerCustom = ImGui_ImplDX11_DrawCallback_SetSamplerCustom;
// Get factory from device
IDXGIDevice* pDXGIDevice = nullptr;