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Backends: SDL_GPU3: use MSL on macOS and MetalLib on iOS to fix shader compatibility. (#9076)

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Edit original PR to keep metallib shader binary since next commit is going to use them.
This commit is contained in:
Leon Lysak
2025-11-26 14:51:22 +01:00
committed by ocornut
parent 285e3042ba
commit fd887f5241
5 changed files with 55 additions and 1 deletions
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15
backends/imgui_impl_sdlgpu3.cpp
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@@ -22,6 +22,7 @@
// Calling the function is MANDATORY, otherwise the ImGui will not upload neither the vertex nor the index buffer for the GPU. See imgui_impl_sdlgpu3.cpp for more info.
// CHANGELOG
// 2025-11-26: Use MSL shaders on macOS to support macOS 10.14+ (instead of Metallib shaders requiring macOS 14+). Requires calling SDL_CreateGPUDevice() with SDL_GPU_SHADERFORMAT_MSL.
// 2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
// 2025-08-20: Added ImGui_ImplSDLGPU3_InitInfo::SwapchainComposition and ImGui_ImplSDLGPU3_InitInfo::PresentMode to configure how secondary viewports are created.
// 2025-08-08: *BREAKING* Changed ImTextureID type from SDL_GPUTextureSamplerBinding* to SDL_GPUTexture*, which is more natural and easier for user to manage. If you need to change the current sampler, you can access the ImGui_ImplSDLGPU3_RenderState struct. (#8866, #8163, #7998, #7988)
@@ -452,6 +453,19 @@ static void ImGui_ImplSDLGPU3_CreateShaders()
#ifdef __APPLE__
else
{
#include <TargetConditionals.h>
#if TARGET_OS_OSX
// macOS: using MSL source
vertex_shader_info.entrypoint = "main0";
vertex_shader_info.format = SDL_GPU_SHADERFORMAT_MSL;
vertex_shader_info.code = msl_vertex;
vertex_shader_info.code_size = sizeof(msl_vertex);
fragment_shader_info.entrypoint = "main0";
fragment_shader_info.format = SDL_GPU_SHADERFORMAT_MSL;
fragment_shader_info.code = msl_fragment;
fragment_shader_info.code_size = sizeof(msl_fragment);
#elif TARGET_OS_IPHONE
// iOS device: using metallib blobs
vertex_shader_info.entrypoint = "main0";
vertex_shader_info.format = SDL_GPU_SHADERFORMAT_METALLIB;
vertex_shader_info.code = metallib_vertex;
@@ -460,6 +474,7 @@ static void ImGui_ImplSDLGPU3_CreateShaders()
fragment_shader_info.format = SDL_GPU_SHADERFORMAT_METALLIB;
fragment_shader_info.code = metallib_fragment;
fragment_shader_info.code_size = sizeof(metallib_fragment);
#endif
}
#endif
bd->VertexShader = SDL_CreateGPUShader(v->Device, &vertex_shader_info);