Backends, Examples: WebGPU: added support for WGVK. (#9316, #9246, #9257)

Squashed: minified SPIRV binaries by stripping strings + emitting in binary_to_compressed_c.

backends/imgui_impl_wgpu.cpp

@@ -56,14 +56,14 @@
 #include <stdio.h>
 
 // One of IMGUI_IMPL_WEBGPU_BACKEND_DAWN or IMGUI_IMPL_WEBGPU_BACKEND_WGPU must be provided. See imgui_impl_wgpu.h for more details.
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) == defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+#if !defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
-#error Exactly one of IMGUI_IMPL_WEBGPU_BACKEND_DAWN or IMGUI_IMPL_WEBGPU_BACKEND_WGPU must be defined!
+#error Exactly one of IMGUI_IMPL_WEBGPU_BACKEND_DAWN, IMGUI_IMPL_WEBGPU_BACKEND_WGPU or IMGUI_IMPL_WEBGPU_BACKEND_WGVK must be defined!
 #endif
 #if defined(__EMSCRIPTEN__) && defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
 #error Emscripten <4.0.10 with '-sUSE_WEBGPU=1' is not supported anymore.
 #endif
 
-#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+#if defined IMGUI_IMPL_WEBGPU_BACKEND_DAWN || defined IMGUI_IMPL_WEBGPU_BACKEND_WGVK
 // Dawn renamed WGPUProgrammableStageDescriptor to WGPUComputeState (see: https://github.com/webgpu-native/webgpu-headers/pull/413)
 // Using type alias until WGPU adopts the same naming convention (#8369)
 using WGPUProgrammableStageDescriptor = WGPUComputeState;
@@ -185,6 +185,60 @@ fn main(in: VertexOutput) -> @location(0) vec4<f32> {
 }
 )";
 
+// Same shader as __shader_vert_wgsl[] but compiled as SPIRV.
+// 'wgslc -o vert.spv vert.wgsl' + 'binary_to_compressed_c -u8 -nocompress vert.spv'
+static const unsigned char __shader_vert_spirv[1996] =
+{
+    3,2,35,7,0,3,1,0,1,0,23,0,90,0,0,0,0,0,0,0,17,0,2,0,1,0,0,0,14,0,3,0,0,0,0,0,1,0,0,0,15,0,12,0,0,0,0,0,78,0,0,0,109,97,105,110,0,0,0,0,8,0,0,0,12,0,0,0,13,0,0,0,16,0,0,0,18,0,0,0,19,
+    0,0,0,21,0,0,0,71,0,4,0,4,0,0,0,6,0,0,0,16,0,0,0,72,0,5,0,3,0,0,0,0,0,0,0,35,0,0,0,0,0,0,0,71,0,3,0,3,0,0,0,2,0,0,0,71,0,4,0,1,0,0,0,34,0,0,0,0,0,0,0,71,0,4,0,1,0,0,0,33,0,0,0,0,0,
+    0,0,71,0,3,0,1,0,0,0,24,0,0,0,71,0,4,0,8,0,0,0,30,0,0,0,0,0,0,0,71,0,4,0,12,0,0,0,30,0,0,0,1,0,0,0,71,0,4,0,13,0,0,0,30,0,0,0,2,0,0,0,71,0,4,0,16,0,0,0,11,0,0,0,0,0,0,0,71,0,4,0,18,
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+    0,0,0,51,0,0,0,55,0,0,0,65,0,6,0,57,0,0,0,56,0,0,0,1,0,0,0,34,0,0,0,54,0,0,0,61,0,5,0,5,0,0,0,58,0,0,0,56,0,0,0,0,0,0,0,124,0,4,0,15,0,0,0,59,0,0,0,58,0,0,0,128,0,5,0,6,0,0,0,60,0,
+    0,0,55,0,0,0,51,0,0,0,134,0,5,0,6,0,0,0,61,0,0,0,60,0,0,0,55,0,0,0,65,0,6,0,57,0,0,0,62,0,0,0,1,0,0,0,34,0,0,0,61,0,0,0,61,0,5,0,5,0,0,0,63,0,0,0,62,0,0,0,0,0,0,0,124,0,4,0,15,0,0,
+    0,64,0,0,0,63,0,0,0,128,0,5,0,6,0,0,0,65,0,0,0,66,0,0,0,51,0,0,0,134,0,5,0,6,0,0,0,67,0,0,0,65,0,0,0,55,0,0,0,65,0,6,0,57,0,0,0,68,0,0,0,1,0,0,0,34,0,0,0,67,0,0,0,61,0,5,0,5,0,0,0,
+    69,0,0,0,68,0,0,0,0,0,0,0,124,0,4,0,15,0,0,0,70,0,0,0,69,0,0,0,128,0,5,0,6,0,0,0,71,0,0,0,72,0,0,0,51,0,0,0,134,0,5,0,6,0,0,0,73,0,0,0,71,0,0,0,55,0,0,0,65,0,6,0,57,0,0,0,74,0,0,0,
+    1,0,0,0,34,0,0,0,73,0,0,0,61,0,5,0,5,0,0,0,75,0,0,0,74,0,0,0,0,0,0,0,124,0,4,0,15,0,0,0,76,0,0,0,75,0,0,0,80,0,7,0,36,0,0,0,77,0,0,0,59,0,0,0,64,0,0,0,70,0,0,0,76,0,0,0,254,0,2,0,77,
+    0,0,0,56,0,1,0,54,0,5,0,79,0,0,0,78,0,0,0,0,0,0,0,80,0,0,0,248,0,2,0,81,0,0,0,61,0,5,0,10,0,0,0,82,0,0,0,8,0,0,0,0,0,0,0,61,0,5,0,10,0,0,0,83,0,0,0,12,0,0,0,0,0,0,0,61,0,5,0,15,0,0,
+    0,84,0,0,0,13,0,0,0,0,0,0,0,80,0,6,0,25,0,0,0,85,0,0,0,82,0,0,0,83,0,0,0,84,0,0,0,57,0,5,0,24,0,0,0,86,0,0,0,23,0,0,0,85,0,0,0,81,0,5,0,15,0,0,0,87,0,0,0,86,0,0,0,0,0,0,0,62,0,4,0,
+    16,0,0,0,87,0,0,0,0,0,0,0,81,0,5,0,15,0,0,0,88,0,0,0,86,0,0,0,1,0,0,0,62,0,4,0,18,0,0,0,88,0,0,0,0,0,0,0,81,0,5,0,10,0,0,0,89,0,0,0,86,0,0,0,2,0,0,0,62,0,4,0,19,0,0,0,89,0,0,0,0,0,
+    0,0,62,0,4,0,21,0,0,0,41,0,0,0,0,0,0,0,253,0,1,0,56,0,1,0,
+};
+
+// Same shader as __shader_frag_wgsl[] but compiled as SPIRV.
+// 'wgslc -o frag.spv frag.wgsl' + 'binary_to_compressed_c -u8 -nocompress frag.spv'
+static const unsigned char __shader_frag_spirv[1392] =
+{
+    3,2,35,7,0,3,1,0,1,0,23,0,60,0,0,0,0,0,0,0,17,0,2,0,1,0,0,0,11,0,6,0,48,0,0,0,71,76,83,76,46,115,116,100,46,52,53,48,0,0,0,0,14,0,3,0,0,0,0,0,1,0,0,0,15,0,9,0,4,0,0,0,51,0,0,0,109,
+    97,105,110,0,0,0,0,15,0,0,0,18,0,0,0,19,0,0,0,22,0,0,0,16,0,3,0,51,0,0,0,7,0,0,0,71,0,4,0,4,0,0,0,6,0,0,0,16,0,0,0,72,0,5,0,3,0,0,0,0,0,0,0,35,0,0,0,0,0,0,0,71,0,3,0,3,0,0,0,2,0,0,
+    0,71,0,4,0,1,0,0,0,34,0,0,0,0,0,0,0,71,0,4,0,1,0,0,0,33,0,0,0,0,0,0,0,71,0,3,0,1,0,0,0,24,0,0,0,71,0,4,0,8,0,0,0,34,0,0,0,0,0,0,0,71,0,4,0,8,0,0,0,33,0,0,0,1,0,0,0,71,0,4,0,11,0,0,
+    0,34,0,0,0,1,0,0,0,71,0,4,0,11,0,0,0,33,0,0,0,0,0,0,0,71,0,4,0,15,0,0,0,11,0,0,0,15,0,0,0,71,0,4,0,18,0,0,0,30,0,0,0,0,0,0,0,71,0,4,0,19,0,0,0,30,0,0,0,1,0,0,0,71,0,4,0,22,0,0,0,30,
+    0,0,0,0,0,0,0,21,0,4,0,6,0,0,0,32,0,0,0,0,0,0,0,23,0,4,0,5,0,0,0,6,0,0,0,4,0,0,0,43,0,4,0,6,0,0,0,7,0,0,0,5,0,0,0,28,0,4,0,4,0,0,0,5,0,0,0,7,0,0,0,30,0,3,0,3,0,0,0,4,0,0,0,32,0,4,0,
+    2,0,0,0,2,0,0,0,3,0,0,0,59,0,4,0,2,0,0,0,1,0,0,0,2,0,0,0,26,0,2,0,10,0,0,0,32,0,4,0,9,0,0,0,0,0,0,0,10,0,0,0,59,0,4,0,9,0,0,0,8,0,0,0,0,0,0,0,22,0,3,0,14,0,0,0,32,0,0,0,25,0,9,0,13,
+    0,0,0,14,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,32,0,4,0,12,0,0,0,0,0,0,0,13,0,0,0,59,0,4,0,12,0,0,0,11,0,0,0,0,0,0,0,23,0,4,0,17,0,0,0,14,0,0,0,4,0,0,0,32,0,4,0,16,
+    0,0,0,1,0,0,0,17,0,0,0,59,0,4,0,16,0,0,0,15,0,0,0,1,0,0,0,59,0,4,0,16,0,0,0,18,0,0,0,1,0,0,0,23,0,4,0,21,0,0,0,14,0,0,0,2,0,0,0,32,0,4,0,20,0,0,0,1,0,0,0,21,0,0,0,59,0,4,0,20,0,0,0,
+    19,0,0,0,1,0,0,0,32,0,4,0,23,0,0,0,3,0,0,0,17,0,0,0,59,0,4,0,23,0,0,0,22,0,0,0,3,0,0,0,30,0,5,0,25,0,0,0,17,0,0,0,17,0,0,0,21,0,0,0,33,0,4,0,27,0,0,0,17,0,0,0,25,0,0,0,27,0,3,0,34,
+    0,0,0,13,0,0,0,23,0,4,0,38,0,0,0,14,0,0,0,3,0,0,0,32,0,4,0,40,0,0,0,2,0,0,0,5,0,0,0,43,0,4,0,6,0,0,0,41,0,0,0,0,0,0,0,43,0,4,0,6,0,0,0,42,0,0,0,4,0,0,0,19,0,2,0,52,0,0,0,33,0,3,0,53,
+    0,0,0,52,0,0,0,54,0,5,0,17,0,0,0,24,0,0,0,0,0,0,0,27,0,0,0,55,0,3,0,25,0,0,0,26,0,0,0,248,0,2,0,28,0,0,0,81,0,5,0,17,0,0,0,29,0,0,0,26,0,0,0,1,0,0,0,61,0,5,0,13,0,0,0,30,0,0,0,11,0,
+    0,0,0,0,0,0,61,0,5,0,10,0,0,0,31,0,0,0,8,0,0,0,0,0,0,0,81,0,5,0,21,0,0,0,32,0,0,0,26,0,0,0,2,0,0,0,86,0,5,0,34,0,0,0,33,0,0,0,30,0,0,0,31,0,0,0,87,0,6,0,17,0,0,0,35,0,0,0,33,0,0,0,
+    32,0,0,0,0,0,0,0,133,0,5,0,17,0,0,0,36,0,0,0,29,0,0,0,35,0,0,0,79,0,8,0,38,0,0,0,37,0,0,0,36,0,0,0,36,0,0,0,0,0,0,0,1,0,0,0,2,0,0,0,65,0,6,0,40,0,0,0,39,0,0,0,1,0,0,0,41,0,0,0,42,0,
+    0,0,61,0,5,0,5,0,0,0,43,0,0,0,39,0,0,0,0,0,0,0,81,0,5,0,6,0,0,0,44,0,0,0,43,0,0,0,0,0,0,0,124,0,4,0,14,0,0,0,45,0,0,0,44,0,0,0,80,0,6,0,38,0,0,0,46,0,0,0,45,0,0,0,45,0,0,0,45,0,0,0,
+    12,0,7,0,38,0,0,0,47,0,0,0,48,0,0,0,26,0,0,0,37,0,0,0,46,0,0,0,81,0,5,0,14,0,0,0,49,0,0,0,36,0,0,0,3,0,0,0,80,0,5,0,17,0,0,0,50,0,0,0,47,0,0,0,49,0,0,0,254,0,2,0,50,0,0,0,56,0,1,0,
+    54,0,5,0,52,0,0,0,51,0,0,0,0,0,0,0,53,0,0,0,248,0,2,0,54,0,0,0,61,0,5,0,17,0,0,0,55,0,0,0,15,0,0,0,0,0,0,0,61,0,5,0,17,0,0,0,56,0,0,0,18,0,0,0,0,0,0,0,61,0,5,0,21,0,0,0,57,0,0,0,19,
+    0,0,0,0,0,0,0,80,0,6,0,25,0,0,0,58,0,0,0,55,0,0,0,56,0,0,0,57,0,0,0,57,0,5,0,17,0,0,0,59,0,0,0,24,0,0,0,58,0,0,0,62,0,4,0,22,0,0,0,59,0,0,0,0,0,0,0,253,0,1,0,56,0,1,0,
+};
+
 static void SafeRelease(ImDrawIdx*& res)
 {
     if (res)
@@ -273,6 +327,25 @@ static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModule(const c
     return stage_desc;
 }
 
+static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModule(const void* spirv_binary, size_t spirv_length)
+{
+    ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
+
+    WGPUShaderSourceSPIRV spirv_desc = {};
+    spirv_desc.chain.sType = WGPUSType_ShaderSourceSPIRV;
+    spirv_desc.code = (const uint32_t *)spirv_binary;
+    spirv_desc.codeSize = ((uint32_t)(spirv_length / 4));
+
+    WGPUShaderModuleDescriptor desc = {};
+    desc.nextInChain = (WGPUChainedStruct*)&spirv_desc;
+
+    WGPUProgrammableStageDescriptor stage_desc = {};
+    stage_desc.module = wgpuDeviceCreateShaderModule(bd->wgpuDevice, &desc);
+
+    stage_desc.entryPoint = { "main", WGPU_STRLEN };
+    return stage_desc;
+}
+
 static WGPUBindGroup ImGui_ImplWGPU_CreateImageBindGroup(WGPUBindGroupLayout layout, WGPUTextureView texture)
 {
     ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
@@ -666,13 +739,14 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
 
     // Create the vertex shader
     WGPUProgrammableStageDescriptor vertex_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__shader_vert_wgsl);
+    if (!vertex_shader_desc.module) vertex_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__shader_vert_spirv, sizeof(__shader_vert_spirv));
     graphics_pipeline_desc.vertex.module = vertex_shader_desc.module;
     graphics_pipeline_desc.vertex.entryPoint = vertex_shader_desc.entryPoint;
 
     // Vertex input configuration
     WGPUVertexAttribute attribute_desc[] =
     {
-#ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+#if defined IMGUI_IMPL_WEBGPU_BACKEND_DAWN || defined IMGUI_IMPL_WEBGPU_BACKEND_WGVK
         { nullptr, WGPUVertexFormat_Float32x2, (uint64_t)offsetof(ImDrawVert, pos), 0 },
         { nullptr, WGPUVertexFormat_Float32x2, (uint64_t)offsetof(ImDrawVert, uv),  1 },
         { nullptr, WGPUVertexFormat_Unorm8x4,  (uint64_t)offsetof(ImDrawVert, col), 2 },
@@ -694,6 +768,7 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
 
     // Create the pixel shader
     WGPUProgrammableStageDescriptor pixel_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__shader_frag_wgsl);
+    if (!pixel_shader_desc.module)  pixel_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__shader_frag_spirv, sizeof(__shader_frag_spirv));
 
     // Create the blending setup
     WGPUBlendState blend_state = {};
@@ -806,6 +881,8 @@ bool ImGui_ImplWGPU_Init(ImGui_ImplWGPU_InitInfo* init_info)
 #endif
 #elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
     io.BackendRendererName = "imgui_impl_wgpu (WGPU, Native)";
+#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
+    io.BackendRendererName = "imgui_impl_wgpu (WGVK, Native)";
 #endif
     io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
     io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
@@ -877,7 +954,7 @@ void ImGui_ImplWGPU_NewFrame()
 
 bool ImGui_ImplWGPU_IsSurfaceStatusError(WGPUSurfaceGetCurrentTextureStatus status)
 {
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
+#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
     return (status == WGPUSurfaceGetCurrentTextureStatus_Error);
 #else
     return (status == WGPUSurfaceGetCurrentTextureStatus_OutOfMemory || status == WGPUSurfaceGetCurrentTextureStatus_DeviceLost);
@@ -894,7 +971,7 @@ bool ImGui_ImplWGPU_IsSurfaceStatusSubOptimal(WGPUSurfaceGetCurrentTextureStatus
 }
 
 // Helpers to obtain a string
-#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN)
+#if defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
 const char* ImGui_ImplWGPU_GetErrorTypeName(WGPUErrorType type)
 {
     switch (type)

backends/imgui_impl_wgpu.h

@@ -3,7 +3,7 @@
 // (Please note that WebGPU is a recent API, may not be supported by all browser, and its ecosystem is generally a mess)
 
 // When targeting native platforms:
-//  - One of IMGUI_IMPL_WEBGPU_BACKEND_DAWN or IMGUI_IMPL_WEBGPU_BACKEND_WGPU *must* be provided.
+//  - One of IMGUI_IMPL_WEBGPU_BACKEND_DAWN, IMGUI_IMPL_WEBGPU_BACKEND_WGPU or IMGUI_IMPL_WEBGPU_BACKEND_WGVK *must* be provided.
 // When targeting Emscripten:
 //  - We now defaults to IMGUI_IMPL_WEBGPU_BACKEND_DAWN and requires Emscripten 4.0.10+, which correspond to using Emscripten '--use-port=emdawnwebgpu'.
 //  - Emscripten < 4.0.10 is not supported anymore (old '-sUSE_WEBGPU=1' option).
@@ -12,6 +12,7 @@
 // This requirement may be removed once WebGPU stabilizes and backends converge on a unified interface.
 //#define IMGUI_IMPL_WEBGPU_BACKEND_DAWN
 //#define IMGUI_IMPL_WEBGPU_BACKEND_WGPU
+//#define IMGUI_IMPL_WEBGPU_BACKEND_WGVK
 
 // Implemented features:
 //  [X] Renderer: User texture binding. Use 'WGPUTextureView' as ImTextureID. Read the FAQ about ImTextureID/ImTextureRef!

examples/example_glfw_wgpu/main.cpp

@@ -340,7 +340,7 @@ static WGPUDevice RequestDevice(wgpu::Instance& instance, wgpu::Adapter& adapter
     IM_ASSERT(acquired_device != nullptr && waitStatusDevice == wgpu::WaitStatus::Success && "Error on Device request");
     return acquired_device.MoveToCHandle();
 }
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
 static void handle_request_adapter(WGPURequestAdapterStatus status, WGPUAdapter adapter, WGPUStringView message, void* userdata1, void* userdata2)
 {
     IM_UNUSED(userdata2);
@@ -441,17 +441,19 @@ bool InitWGPU(GLFWwindow* window)
     preferred_fmt = surface_capabilities.formats[0];
 
     // WGPU backend: Adapter and Device acquisition, Surface creation
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
     WGPUInstanceDescriptor instanceDesc = {};
     WGPUInstanceFeatureName timedWaitAny = WGPUInstanceFeatureName_TimedWaitAny;
     instanceDesc.requiredFeatureCount = 1;
     instanceDesc.requiredFeatures = &timedWaitAny;
     wgpu_instance = wgpuCreateInstance(&instanceDesc);
 
+#if defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
     wgpuSetLogCallback(
         [](WGPULogLevel level, WGPUStringView msg, void* userdata) { fprintf(stderr, "%s: %.*s\n", ImGui_ImplWGPU_GetLogLevelName(level), (int)msg.length, msg.data); }, nullptr
     );
     wgpuSetLogLevel(WGPULogLevel_Warn);
+#endif
 
     WGPUAdapter adapter = RequestAdapter(wgpu_instance);
     ImGui_ImplWGPU_DebugPrintAdapterInfo(adapter);

examples/example_sdl2_wgpu/main.cpp

@@ -326,7 +326,7 @@ static WGPUDevice RequestDevice(wgpu::Instance& instance, wgpu::Adapter& adapter
     IM_ASSERT(acquired_device != nullptr && waitStatusDevice == wgpu::WaitStatus::Success && "Error on Device request");
     return acquired_device.MoveToCHandle();
 }
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
 static void handle_request_adapter(WGPURequestAdapterStatus status, WGPUAdapter adapter, WGPUStringView message, void* userdata1, void* userdata2)
 {
     IM_UNUSED(userdata2);
@@ -428,17 +428,19 @@ static bool InitWGPU(SDL_Window* window)
     preferred_fmt = surface_capabilities.formats[0];
 
     // WGPU backend: Adapter and Device acquisition, Surface creation
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) ||  defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
     WGPUInstanceDescriptor instanceDesc = {};
     WGPUInstanceFeatureName timedWaitAny = WGPUInstanceFeatureName_TimedWaitAny;
     instanceDesc.requiredFeatureCount = 1;
     instanceDesc.requiredFeatures = &timedWaitAny;
     wgpu_instance = wgpuCreateInstance(&instanceDesc);
 
+#if defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
     wgpuSetLogCallback(
         [](WGPULogLevel level, WGPUStringView msg, void* userdata) { fprintf(stderr, "%s: %.*s\n", ImGui_ImplWGPU_GetLogLevelName(level), (int)msg.length, msg.data); }, nullptr
     );
     wgpuSetLogLevel(WGPULogLevel_Warn);
+#endif
 
     WGPUAdapter adapter = RequestAdapter(wgpu_instance);
     ImGui_ImplWGPU_DebugPrintAdapterInfo(adapter);

examples/example_sdl3_wgpu/main.cpp

@@ -337,7 +337,7 @@ static WGPUDevice RequestDevice(wgpu::Instance& instance, wgpu::Adapter& adapter
     IM_ASSERT(acquired_device != nullptr && waitStatusDevice == wgpu::WaitStatus::Success && "Error on Device request");
     return acquired_device.MoveToCHandle();
 }
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
 static void handle_request_adapter(WGPURequestAdapterStatus status, WGPUAdapter adapter, WGPUStringView message, void* userdata1, void* userdata2)
 {
     IM_UNUSED(userdata2);
@@ -439,17 +439,19 @@ static bool InitWGPU(SDL_Window* window)
     preferred_fmt = surface_capabilities.formats[0];
 
     // WGPU backend: Adapter and Device acquisition, Surface creation
-#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
+#elif defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) || defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
     WGPUInstanceDescriptor instanceDesc = {};
     WGPUInstanceFeatureName timedWaitAny = WGPUInstanceFeatureName_TimedWaitAny;
     instanceDesc.requiredFeatureCount = 1;
     instanceDesc.requiredFeatures = &timedWaitAny;
     wgpu_instance = wgpuCreateInstance(&instanceDesc);
 
+#if defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
     wgpuSetLogCallback(
         [](WGPULogLevel level, WGPUStringView msg, void* userdata) { fprintf(stderr, "%s: %.*s\n", ImGui_ImplWGPU_GetLogLevelName(level), (int)msg.length, msg.data); }, nullptr
     );
     wgpuSetLogLevel(WGPULogLevel_Warn);
+#endif
 
     WGPUAdapter adapter = RequestAdapter(wgpu_instance);
     ImGui_ImplWGPU_DebugPrintAdapterInfo(adapter);