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Examples: SDL2+Metal: fixed mismatches with other examples.

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ocornut
2026-08-06 21:17:55 +02:00
parent 730f099239
commit 98f3efcf07
1 changed files with 56 additions and 46 deletions
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102
examples/example_sdl2_metal/main.mm
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@@ -10,25 +10,74 @@
#include "imgui.h"
#include "imgui_impl_sdl2.h"
#include "imgui_impl_metal.h"
#include <stdio.h>
#include <stdio.h> // printf, fprintf
#include <SDL.h>
#import <Metal/Metal.h>
#import <QuartzCore/QuartzCore.h>
// Main code
int main(int, char**)
{
// Setup SDL
// (Some versions of SDL before <2.0.10 appears to have performance/stalling issues on a minority of Windows systems,
// depending on whether SDL_INIT_GAMECONTROLLER is enabled or disabled.. updating to latest version of SDL is recommended!)
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMECONTROLLER) != 0)
{
printf("Error: SDL_Init(): %s\n", SDL_GetError());
return 1;
}
// Inform SDL that we will be using metal for rendering. Without this hint initialization of Metal renderer may fail.
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "metal");
// From 2.0.18: Enable native IME.
#ifdef SDL_HINT_IME_SHOW_UI
SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");
#endif
// Create SDL window graphics context
float main_scale = ImGui_ImplSDL2_GetContentScaleForDisplay(0);
int window_flags = SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI;
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+Metal example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, (int)(1280 * main_scale), (int)(800 * main_scale), window_flags);
if (window == nullptr)
{
printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError());
return 1;
}
SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
if (renderer == nullptr)
{
printf("Error creating renderer: %s\n", SDL_GetError());
return -3;
}
CAMetalLayer* layer = (__bridge CAMetalLayer*)SDL_RenderGetMetalLayer(renderer);
layer.pixelFormat = MTLPixelFormatBGRA8Unorm;
id<MTLCommandQueue> commandQueue = [layer.device newCommandQueue];
MTLRenderPassDescriptor* renderPassDescriptor = [MTLRenderPassDescriptor new];
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
// Setup style
// Setup Dear ImGui style
ImGui::StyleColorsDark();
//ImGui::StyleColorsLight();
// Setup scaling
ImGuiStyle& style = ImGui::GetStyle();
style.ScaleAllSizes(main_scale); // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
style.FontScaleDpi = main_scale; // Set initial font scale. (in docking branch: using io.ConfigDpiScaleFonts=true automatically overrides this for every window depending on the current monitor)
// Setup Platform/Renderer backends
ImGui_ImplMetal_Init(layer.device);
ImGui_ImplSDL2_InitForMetal(window);
// Load Fonts
// - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
// This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
@@ -47,50 +96,10 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
//IM_ASSERT(font != nullptr);
// Setup SDL
// (Some versions of SDL before <2.0.10 appears to have performance/stalling issues on a minority of Windows systems,
// depending on whether SDL_INIT_GAMECONTROLLER is enabled or disabled.. updating to latest version of SDL is recommended!)
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMECONTROLLER) != 0)
{
printf("Error: %s\n", SDL_GetError());
return 1;
}
// Inform SDL that we will be using metal for rendering. Without this hint initialization of Metal renderer may fail.
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "metal");
// From 2.0.18: Enable native IME.
#ifdef SDL_HINT_IME_SHOW_UI
SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");
#endif
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+Metal example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 800, SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
if (window == nullptr)
{
printf("Error creating window: %s\n", SDL_GetError());
return -2;
}
SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
if (renderer == nullptr)
{
printf("Error creating renderer: %s\n", SDL_GetError());
return -3;
}
// Setup Platform/Renderer backends
CAMetalLayer* layer = (__bridge CAMetalLayer*)SDL_RenderGetMetalLayer(renderer);
layer.pixelFormat = MTLPixelFormatBGRA8Unorm;
ImGui_ImplMetal_Init(layer.device);
ImGui_ImplSDL2_InitForMetal(window);
id<MTLCommandQueue> commandQueue = [layer.device newCommandQueue];
MTLRenderPassDescriptor* renderPassDescriptor = [MTLRenderPassDescriptor new];
// Our state
bool show_demo_window = true;
bool show_another_window = false;
float clear_color[4] = {0.45f, 0.55f, 0.60f, 1.00f};
float clear_color[4] = { 0.45f, 0.55f, 0.60f, 1.00f };
// Main loop
bool done = false;
@@ -170,7 +179,8 @@ int main(int, char**)
// Rendering
ImGui::Render();
ImGui_ImplMetal_RenderDrawData(ImGui::GetDrawData(), commandBuffer, renderEncoder);
ImDrawData* draw_data = ImGui::GetDrawData();
ImGui_ImplMetal_RenderDrawData(draw_data, commandBuffer, renderEncoder);
[renderEncoder popDebugGroup];
[renderEncoder endEncoding];