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Examples: WebGPU: moved CreateWGPUSurface to the bottom of the file due to interference with X.h. (#8381)

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BrutPitt
2025-11-01 10:41:59 +01:00
committed by ocornut
parent 8e5e79054e
commit df3f2fff88
3 changed files with 185 additions and 186 deletions
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112
examples/example_sdl3_wgpu/main.cpp
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@@ -26,7 +26,6 @@
#include "../libs/emscripten/emscripten_mainloop_stub.h"
#endif
#include <webgpu/webgpu.h>
#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
#include <webgpu/webgpu_cpp.h>
#endif
@@ -41,7 +40,8 @@ static int wgpu_surface_width = 1280;
static int wgpu_surface_height = 800;
// Forward declarations
static bool InitWGPU(SDL_Window* window);
static bool InitWGPU(SDL_Window* window);
static WGPUSurface CreateWGPUSurface(const WGPUInstance& instance, SDL_Window* window);
static void ResizeSurface(int width, int height)
{
@@ -286,60 +286,6 @@ int main(int, char**)
return 0;
}
// SDL3 helper to create a WebGPU surface (exclusively!) for Native/Desktop applications: available only together with WebGPU/WGPU backend
// As of today (2025/10) there is no "official" support in SDL3 to create a surface for WebGPU backend
// This stub uses "low level" SDL3 calls to acquire information from a specific Window Manager.
// Currently supported platforms: Windows / Linux (X11 and Wayland) / MacOS. Not necessary nor available with EMSCRIPTEN.
#if !defined(__EMSCRIPTEN__) && (defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN))
#if defined(SDL_PLATFORM_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
#endif
WGPUSurface CreateWGPUSurface(const WGPUInstance& instance, SDL_Window* window)
{
SDL_PropertiesID propertiesID = SDL_GetWindowProperties(window);
ImGui_ImplWGPU_CreateSurfaceInfo create_info = {};
create_info.Instance = instance;
#if defined(SDL_PLATFORM_MACOS)
{
create_info.System = "cocoa";
create_info.RawWindow = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_COCOA_WINDOW_POINTER, NULL);
return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
}
#elif defined(SDL_PLATFORM_LINUX)
if (SDL_strcmp(SDL_GetCurrentVideoDriver(), "wayland") == 0)
{
create_info.System = "wayland";
create_info.RawDisplay = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_WAYLAND_DISPLAY_POINTER, NULL);
create_info.RawSurface = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_WAYLAND_SURFACE_POINTER, NULL);
return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
}
else if (!SDL_strcmp(SDL_GetCurrentVideoDriver(), "x11"))
{
create_info.System = "x11";
create_info.RawWindow = (void*)SDL_GetNumberProperty(propertiesID, SDL_PROP_WINDOW_X11_WINDOW_NUMBER, 0);
create_info.RawDisplay = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_X11_DISPLAY_POINTER, NULL);
return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
}
#elif defined(SDL_PLATFORM_WIN32)
{
create_info.System = "win32";
create_info.RawWindow = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_WIN32_HWND_POINTER, NULL);
create_info.RawInstance = (void*)::GetModuleHandle(NULL);
return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
}
#else
#error "Unsupported WebGPU native platform!"
#endif
return nullptr;
}
#endif
#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
static WGPUAdapter RequestAdapter(wgpu::Instance& instance)
{
@@ -551,3 +497,57 @@ static bool InitWGPU(SDL_Window* window)
return true;
}
// SDL3 helper to create a WebGPU surface (exclusively!) for Native/Desktop applications: available only together with WebGPU/WGPU backend
// As of today (2025/10) there is no "official" support in SDL3 to create a surface for WebGPU backend
// This stub uses "low level" SDL3 calls to acquire information from a specific Window Manager.
// Currently supported platforms: Windows / Linux (X11 and Wayland) / MacOS. Not necessary nor available with EMSCRIPTEN.
#if !defined(__EMSCRIPTEN__) && (defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN))
#if defined(SDL_PLATFORM_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#include <windows.h>
#endif
static WGPUSurface CreateWGPUSurface(const WGPUInstance& instance, SDL_Window* window)
{
SDL_PropertiesID propertiesID = SDL_GetWindowProperties(window);
ImGui_ImplWGPU_CreateSurfaceInfo create_info = {};
create_info.Instance = instance;
#if defined(SDL_PLATFORM_MACOS)
{
create_info.System = "cocoa";
create_info.RawWindow = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_COCOA_WINDOW_POINTER, NULL);
return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
}
#elif defined(SDL_PLATFORM_LINUX)
if (SDL_strcmp(SDL_GetCurrentVideoDriver(), "wayland") == 0)
{
create_info.System = "wayland";
create_info.RawDisplay = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_WAYLAND_DISPLAY_POINTER, NULL);
create_info.RawSurface = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_WAYLAND_SURFACE_POINTER, NULL);
return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
}
else if (!SDL_strcmp(SDL_GetCurrentVideoDriver(), "x11"))
{
create_info.System = "x11";
create_info.RawWindow = (void*)SDL_GetNumberProperty(propertiesID, SDL_PROP_WINDOW_X11_WINDOW_NUMBER, 0);
create_info.RawDisplay = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_X11_DISPLAY_POINTER, NULL);
return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
}
#elif defined(SDL_PLATFORM_WIN32)
{
create_info.System = "win32";
create_info.RawWindow = (void*)SDL_GetPointerProperty(propertiesID, SDL_PROP_WINDOW_WIN32_HWND_POINTER, NULL);
create_info.RawInstance = (void*)::GetModuleHandle(NULL);
return ImGui_ImplWGPU_CreateWGPUSurfaceHelper(&create_info);
}
#else
#error "Unsupported WebGPU native platform!"
#endif
return nullptr;
}
#endif