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Backends: DX11, DX12, Vulkan, WGPU: Expose some backend-specific render state usable for callbacks. (#6969, #5834, #7468, #3590)

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ocornut
2024-10-07 21:00:07 +02:00
parent 9bd5d8a240
commit e94f95d82b
10 changed files with 109 additions and 11 deletions
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10
backends/imgui_impl_dx12.cpp
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@@ -4,6 +4,7 @@
// Implemented features:
// [X] Renderer: User texture binding. Use 'D3D12_GPU_DESCRIPTOR_HANDLE' as ImTextureID. Read the FAQ about ImTextureID!
// [X] Renderer: Large meshes support (64k+ vertices) with 16-bit indices.
// [X] Renderer: Expose selected render state for draw callbacks to use. Access in '(ImGui_ImplXXXX_RenderState*)platform_io.BackendRendererRenderState'.
// Important: to compile on 32-bit systems, this backend requires code to be compiled with '#define ImTextureID ImU64'.
// This is because we need ImTextureID to carry a 64-bit value and by default ImTextureID is defined as void*.
@@ -23,6 +24,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2024-10-07: DirectX12: Expose selected render state in ImGui_ImplDX12_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks.
// 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
// 2021-05-19: DirectX12: Replaced direct access to ImDrawCmd::TextureId with a call to ImDrawCmd::GetTexID(). (will become a requirement)
@@ -245,6 +247,13 @@ void ImGui_ImplDX12_RenderDrawData(ImDrawData* draw_data, ID3D12GraphicsCommandL
// Setup desired DX state
ImGui_ImplDX12_SetupRenderState(draw_data, command_list, fr);
// Setup render state structure (for callbacks and custom texture bindings)
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
ImGui_ImplDX12_RenderState render_state;
render_state.Device = bd->pd3dDevice;
render_state.CommandList = command_list;
platform_io.Renderer_RenderState = &render_state;
// Render command lists
// (Because we merged all buffers into a single one, we maintain our own offset into them)
int global_vtx_offset = 0;
@@ -287,6 +296,7 @@ void ImGui_ImplDX12_RenderDrawData(ImDrawData* draw_data, ID3D12GraphicsCommandL
global_idx_offset += draw_list->IdxBuffer.Size;
global_vtx_offset += draw_list->VtxBuffer.Size;
}
platform_io.Renderer_RenderState = NULL;
}
static void ImGui_ImplDX12_CreateFontsTexture()