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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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11
backends/imgui_impl_vulkan.cpp
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@@ -4,6 +4,7 @@
// Implemented features:
// [!] Renderer: User texture binding. Use 'VkDescriptorSet' as ImTextureID. Read the FAQ about ImTextureID! See https://github.com/ocornut/imgui/pull/914 for discussions.
// [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: on 32-bit systems, user texture binding is only supported if your imconfig file has '#define ImTextureID ImU64'.
// This is because we need ImTextureID to carry a 64-bit value and by default ImTextureID is defined as void*.
@@ -33,6 +34,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2024-10-07: Vulkan: Expose selected render state in ImGui_ImplVulkan_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks.
// 2024-04-19: Vulkan: Added convenience support for Volk via IMGUI_IMPL_VULKAN_USE_VOLK define (you can also use IMGUI_IMPL_VULKAN_NO_PROTOTYPES + wrap Volk via ImGui_ImplVulkan_LoadFunctions().)
// 2024-02-14: *BREAKING CHANGE*: Moved RenderPass parameter from ImGui_ImplVulkan_Init() function to ImGui_ImplVulkan_InitInfo structure. Not required when using dynamic rendering.
// 2024-02-12: *BREAKING CHANGE*: Dynamic rendering now require filling PipelineRenderingCreateInfo structure.
@@ -540,6 +542,14 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm
// Setup desired Vulkan state
ImGui_ImplVulkan_SetupRenderState(draw_data, pipeline, command_buffer, rb, fb_width, fb_height);
// Setup render state structure (for callbacks and custom texture bindings)
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
ImGui_ImplVulkan_RenderState render_state;
render_state.CommandBuffer = command_buffer;
render_state.Pipeline = pipeline;
render_state.PipelineLayout = bd->PipelineLayout;
platform_io.Renderer_RenderState = &render_state;
// Will project scissor/clipping rectangles into framebuffer space
ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports
ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
@@ -602,6 +612,7 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm
global_idx_offset += draw_list->IdxBuffer.Size;
global_vtx_offset += draw_list->VtxBuffer.Size;
}
platform_io.Renderer_RenderState = NULL;
// Note: at this point both vkCmdSetViewport() and vkCmdSetScissor() have been called.
// Our last values will leak into user/application rendering IF: