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Backends: SDLGPU3: Added sdl_gpu backend (amends). (#8163, #7998, #7988)

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ocornut
2025-01-09 16:08:14 +01:00
parent 8bbccf7a97
commit e799849272
10 changed files with 220 additions and 200 deletions
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53
examples/example_sdl3_sdlgpu3/main.cpp
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@@ -1,4 +1,4 @@
// Dear ImGui: standalone example application for SDL_Gpu
// Dear ImGui: standalone example application for SDL3 + SDL_GPU
// Learn about Dear ImGui:
// - FAQ https://dearimgui.com/faq
@@ -17,7 +17,6 @@
#include <stdlib.h> // abort
#include <SDL3/SDL.h>
// This example doesn't compile with Emscripten yet! Awaiting SDL3 support.
#ifdef __EMSCRIPTEN__
#include "../libs/emscripten/emscripten_mainloop_stub.h"
@@ -34,23 +33,23 @@ int main(int, char**)
}
// Create SDL window graphics context
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDLGpu example", 1280, 720, SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIGH_PIXEL_DENSITY);
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL3+SDL_GPU example", 1280, 720, SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIGH_PIXEL_DENSITY);
if (window == nullptr)
{
printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError());
return -1;
}
// Create SDL Gpu Device
SDL_GPUDevice* gpuDevice = SDL_CreateGPUDevice(SDL_GPU_SHADERFORMAT_SPIRV | SDL_GPU_SHADERFORMAT_DXIL | SDL_GPU_SHADERFORMAT_METALLIB,true,nullptr);
if (gpuDevice == nullptr)
// Create GPU Device
SDL_GPUDevice* gpu_device = SDL_CreateGPUDevice(SDL_GPU_SHADERFORMAT_SPIRV | SDL_GPU_SHADERFORMAT_DXIL | SDL_GPU_SHADERFORMAT_METALLIB,true,nullptr);
if (gpu_device == nullptr)
{
printf("Error: SDL_CreateGPUDevice(): %s\n", SDL_GetError());
return -1;
}
// Claim window for GPU Device
if (!SDL_ClaimWindowForGPUDevice(gpuDevice, window))
if (!SDL_ClaimWindowForGPUDevice(gpu_device, window))
{
printf("Error: SDL_ClaimWindowForGPUDevice(): %s\n", SDL_GetError());
return -1;
@@ -69,11 +68,11 @@ int main(int, char**)
// Setup Platform/Renderer backends
ImGui_ImplSDL3_InitForOther(window);
ImGui_ImplSDLGPU_InitInfo init_info = {};
init_info.GpuDevice = gpuDevice;
init_info.ColorTargetFormat = SDL_GetGPUSwapchainTextureFormat(gpuDevice, window);
ImGui_ImplSDLGPU3_InitInfo init_info = {};
init_info.GpuDevice = gpu_device;
init_info.ColorTargetFormat = SDL_GetGPUSwapchainTextureFormat(gpu_device, window);
init_info.MSAASamples = SDL_GPU_SAMPLECOUNT_1;
ImGui_ImplSDLGPU_Init(&init_info);
ImGui_ImplSDLGPU3_Init(&init_info);
// Load Fonts
// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
@@ -119,9 +118,9 @@ int main(int, char**)
SDL_Delay(10);
continue;
}
// Start the Dear ImGui frame
ImGui_ImplSDLGPU_NewFrame();
ImGui_ImplSDLGPU3_NewFrame();
ImGui_ImplSDL3_NewFrame();
ImGui::NewFrame();
@@ -167,18 +166,15 @@ int main(int, char**)
ImDrawData* draw_data = ImGui::GetDrawData();
const bool is_minimized = (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f);
// Acquire a GPU command buffer
SDL_GPUCommandBuffer* command_buffer = SDL_AcquireGPUCommandBuffer(gpuDevice);
SDL_GPUCommandBuffer* command_buffer = SDL_AcquireGPUCommandBuffer(gpu_device); // Acquire a GPU command buffer
//Acquire a swapchain texture
SDL_GPUTexture* swapchain_texture;
SDL_AcquireGPUSwapchainTexture(command_buffer, window, &swapchain_texture, nullptr, nullptr);
SDL_AcquireGPUSwapchainTexture(command_buffer, window, &swapchain_texture, nullptr, nullptr); // Acquire a swapchain texture
if (swapchain_texture != nullptr && !is_minimized)
{
// !!! THIS IS MANDATORY !!!
// Call Imgui_ImplSDLGPU_PrepareDrawData to upload the vertex/index buffer
Imgui_ImplSDLGPU_PrepareDrawData(draw_data, command_buffer);
// This is mandatory: call Imgui_ImplSDLGPU3_PrepareDrawData() to upload the vertex/index buffer!
Imgui_ImplSDLGPU3_PrepareDrawData(draw_data, command_buffer);
// Setup and start a render pass
SDL_GPUColorTargetInfo target_info = {};
@@ -190,21 +186,26 @@ int main(int, char**)
target_info.layer_or_depth_plane = 0;
target_info.cycle = false;
SDL_GPURenderPass* render_pass = SDL_BeginGPURenderPass(command_buffer, &target_info, 1, nullptr);
/// Render ImGui
ImGui_ImplSDLGPU_RenderDrawData(draw_data, command_buffer, render_pass);
// Render ImGui
ImGui_ImplSDLGPU3_RenderDrawData(draw_data, command_buffer, render_pass);
SDL_EndGPURenderPass(render_pass);
}
// Submit the command buffer
SDL_SubmitGPUCommandBuffer(command_buffer);
}
// Cleanup
SDL_WaitForGPUIdle(gpuDevice);
SDL_WaitForGPUIdle(gpu_device);
ImGui_ImplSDL3_Shutdown();
ImGui_ImplSDLGPU_Shutdown();
ImGui_ImplSDLGPU3_Shutdown();
ImGui::DestroyContext();
SDL_ReleaseWindowFromGPUDevice(gpuDevice, window);
SDL_DestroyGPUDevice(gpuDevice);
SDL_ReleaseWindowFromGPUDevice(gpu_device, window);
SDL_DestroyGPUDevice(gpu_device);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}