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Backends: SDL_GPU: Added multi-viewport support. (#8573, #8163, #7998, #7988)

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This commit is contained in:
Lekoopapaul
2025-04-15 20:45:18 +02:00
committed by ocornut
parent 0ddc36f543
commit baffc4e8b8
2 changed files with 81 additions and 4 deletions
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82
backends/imgui_impl_sdlgpu3.cpp
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@@ -4,8 +4,7 @@
// Implemented features:
// [X] Renderer: User texture binding. Use simply cast a reference to your SDL_GPUTextureSamplerBinding to ImTextureID.
// [X] Renderer: Large meshes support (64k+ vertices) with 16-bit indices.
// Missing features:
// [ ] Renderer: Multi-viewport support (multiple windows).
// [X] Renderer: Multi-viewport support (multiple windows).
// The aim of imgui_impl_sdlgpu3.h/.cpp is to be usable in your engine without any modification.
// IF YOU FEEL YOU NEED TO MAKE ANY CHANGE TO THIS CODE, please share them and your feedback at https://github.com/ocornut/imgui/
@@ -568,6 +567,9 @@ void ImGui_ImplSDLGPU3_DestroyDeviceObjects()
if (bd->Pipeline) { SDL_ReleaseGPUGraphicsPipeline(v->Device, bd->Pipeline); bd->Pipeline = nullptr;}
}
static void ImGui_ImplSDLGPU3_InitMultiViewportSupport();
static void ImGui_ImplSDLGPU3_ShutdownMultiViewportSupport();
bool ImGui_ImplSDLGPU3_Init(ImGui_ImplSDLGPU3_InitInfo* info)
{
ImGuiIO& io = ImGui::GetIO();
@@ -579,6 +581,8 @@ bool ImGui_ImplSDLGPU3_Init(ImGui_ImplSDLGPU3_InitInfo* info)
io.BackendRendererUserData = (void*)bd;
io.BackendRendererName = "imgui_impl_sdlgpu3";
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports;
IM_ASSERT(info->Device != nullptr);
IM_ASSERT(info->ColorTargetFormat != SDL_GPU_TEXTUREFORMAT_INVALID);
@@ -587,15 +591,20 @@ bool ImGui_ImplSDLGPU3_Init(ImGui_ImplSDLGPU3_InitInfo* info)
ImGui_ImplSDLGPU3_CreateDeviceObjects();
ImGui_ImplSDLGPU3_InitMultiViewportSupport();
return true;
}
void ImGui_ImplSDLGPU3_Shutdown()
{
ImGui_ImplSDLGPU3_Data* bd = ImGui_ImplSDLGPU3_GetBackendData();
IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplSDLGPU3_ShutdownMultiViewportSupport();
ImGui_ImplSDLGPU3_DestroyDeviceObjects();
io.BackendRendererName = nullptr;
io.BackendRendererUserData = nullptr;
@@ -612,4 +621,73 @@ void ImGui_ImplSDLGPU3_NewFrame()
ImGui_ImplSDLGPU3_CreateFontsTexture();
}
//--------------------------------------------------------------------------------------------------------
// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
//--------------------------------------------------------------------------------------------------------
static void ImGui_ImplSDLGPU3_CreateWindow(ImGuiViewport* viewport) {
ImGui_ImplSDLGPU3_Data* data = ImGui_ImplSDLGPU3_GetBackendData();
SDL_Window* window = SDL_GetWindowFromID((SDL_WindowID)(intptr_t)viewport->PlatformHandle);
SDL_ClaimWindowForGPUDevice(data->InitInfo.Device, window);
viewport->RendererUserData = (void*)1;
}
static void ImGui_ImplSDLGPU3_RenderWindow(ImGuiViewport* viewport, void*)
{
ImGui_ImplSDLGPU3_Data* data = ImGui_ImplSDLGPU3_GetBackendData();
SDL_Window* window = SDL_GetWindowFromID((SDL_WindowID)(intptr_t)viewport->PlatformHandle);
ImDrawData* draw_data = viewport->DrawData;
SDL_GPUCommandBuffer* command_buffer = SDL_AcquireGPUCommandBuffer(data->InitInfo.Device);
SDL_GPUTexture* swapchain_texture;
SDL_AcquireGPUSwapchainTexture(command_buffer, window, &swapchain_texture, nullptr, nullptr);
if (swapchain_texture != nullptr)
{
ImGui_ImplSDLGPU3_PrepareDrawData(draw_data, command_buffer);
SDL_GPUColorTargetInfo target_info = {};
target_info.texture = swapchain_texture;
target_info.clear_color = SDL_FColor{ 0.0f,0.0f,0.0f,1.0f };
target_info.load_op = SDL_GPU_LOADOP_CLEAR;
target_info.store_op = SDL_GPU_STOREOP_STORE;
target_info.mip_level = 0;
target_info.layer_or_depth_plane = 0;
target_info.cycle = false;
SDL_GPURenderPass* render_pass = SDL_BeginGPURenderPass(command_buffer, &target_info, 1, nullptr);
ImGui_ImplSDLGPU3_RenderDrawData(draw_data, command_buffer, render_pass);
SDL_EndGPURenderPass(render_pass);
}
SDL_SubmitGPUCommandBuffer(command_buffer);
}
static void ImGui_ImplSDLGPU3_DestroyWindow(ImGuiViewport* viewport) {
ImGui_ImplSDLGPU3_Data* data = ImGui_ImplSDLGPU3_GetBackendData();
if (viewport->RendererUserData) {
SDL_Window* window = SDL_GetWindowFromID((SDL_WindowID)(intptr_t)viewport->PlatformHandle);
SDL_ReleaseWindowFromGPUDevice(data->InitInfo.Device, window);
}
viewport->RendererUserData = nullptr;
}
static void ImGui_ImplSDLGPU3_InitMultiViewportSupport() {
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
platform_io.Renderer_RenderWindow = ImGui_ImplSDLGPU3_RenderWindow;
platform_io.Renderer_CreateWindow = ImGui_ImplSDLGPU3_CreateWindow;
platform_io.Renderer_DestroyWindow = ImGui_ImplSDLGPU3_DestroyWindow;
}
static void ImGui_ImplSDLGPU3_ShutdownMultiViewportSupport()
{
ImGui::DestroyPlatformWindows();
}
#endif // #ifndef IMGUI_DISABLE