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Backend: webgpu: Fixes blending issue on Chrome 90+ and makes backend forward compatible with Emscripten 2.0.14 (#3632, #3770)
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@ -19,6 +19,8 @@
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#include <limits.h>
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#include <webgpu/webgpu.h>
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#define HAS_EMSCRIPTEN_VERSION(major, minor, tiny) (__EMSCRIPTEN_major__ > (major) || (__EMSCRIPTEN_major__ == (major) && __EMSCRIPTEN_minor__ > (minor)) || (__EMSCRIPTEN_major__ == (major) && __EMSCRIPTEN_minor__ == (minor) && __EMSCRIPTEN_tiny__ >= (tiny)))
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// Dear ImGui prototypes from imgui_internal.h
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extern ImGuiID ImHashData(const void* data_p, size_t data_size, ImU32 seed = 0);
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@ -495,7 +497,7 @@ static void ImGui_ImplWGPU_CreateFontsTexture()
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textureCopyView.texture = g_resources.FontTexture;
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textureCopyView.mipLevel = 0;
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textureCopyView.origin = { 0, 0, 0 };
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#ifndef __EMSCRIPTEN__
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#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
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textureCopyView.aspect = WGPUTextureAspect_All;
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#endif
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@ -522,6 +524,9 @@ static void ImGui_ImplWGPU_CreateFontsTexture()
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sampler_desc.addressModeU = WGPUAddressMode_Repeat;
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sampler_desc.addressModeV = WGPUAddressMode_Repeat;
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sampler_desc.addressModeW = WGPUAddressMode_Repeat;
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#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
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sampler_desc.maxAnisotropy = 1;
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#endif
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g_resources.Sampler = wgpuDeviceCreateSampler(g_wgpuDevice, &sampler_desc);
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}
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@ -559,15 +564,28 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
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WGPUBindGroupLayoutEntry common_bg_layout_entries[2] = {};
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common_bg_layout_entries[0].binding = 0;
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common_bg_layout_entries[0].visibility = WGPUShaderStage_Vertex;
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#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
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common_bg_layout_entries[0].buffer.type = WGPUBufferBindingType_Uniform;
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#else
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common_bg_layout_entries[0].type = WGPUBindingType_UniformBuffer;
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#endif
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common_bg_layout_entries[1].binding = 1;
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common_bg_layout_entries[1].visibility = WGPUShaderStage_Fragment;
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#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
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common_bg_layout_entries[1].sampler.type = WGPUSamplerBindingType_Filtering;
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#else
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common_bg_layout_entries[1].type = WGPUBindingType_Sampler;
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#endif
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WGPUBindGroupLayoutEntry image_bg_layout_entries[1] = {};
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image_bg_layout_entries[0].binding = 0;
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image_bg_layout_entries[0].visibility = WGPUShaderStage_Fragment;
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#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
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image_bg_layout_entries[0].texture.sampleType = WGPUTextureSampleType_Float;
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image_bg_layout_entries[0].texture.viewDimension = WGPUTextureViewDimension_2D;
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#else
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image_bg_layout_entries[0].type = WGPUBindingType_SampledTexture;
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#endif
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WGPUBindGroupLayoutDescriptor common_bg_layout_desc = {};
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common_bg_layout_desc.entryCount = 2;
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@ -620,8 +638,8 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
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{
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color_state.format = g_renderTargetFormat;
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color_state.alphaBlend.operation = WGPUBlendOperation_Add;
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color_state.alphaBlend.srcFactor = WGPUBlendFactor_OneMinusSrcAlpha;
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color_state.alphaBlend.dstFactor = WGPUBlendFactor_Zero;
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color_state.alphaBlend.srcFactor = WGPUBlendFactor_SrcAlpha;
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color_state.alphaBlend.dstFactor = WGPUBlendFactor_OneMinusSrcAlpha;
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color_state.colorBlend.operation = WGPUBlendOperation_Add;
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color_state.colorBlend.srcFactor = WGPUBlendFactor_SrcAlpha;
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color_state.colorBlend.dstFactor = WGPUBlendFactor_OneMinusSrcAlpha;
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