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Backends: WGPU: update to latest specs. (#4116, #3632)

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Merged 13 commits.
docking
Basil Fierz 4 years ago committed by ocornut
parent 4ce6bd8cff
commit 83bdfef8e0
3 changed files with 99 additions and 172 deletions
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262
backends/imgui_impl_wgpu.cpp
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@ -12,6 +12,7 @@
// CHANGELOG // CHANGELOG
// (minor and older changes stripped away, please see git history for details) // (minor and older changes stripped away, please see git history for details)
// 2021-05-16: Update to latest WebGPU specs (compatible with Emscripten 2.0.20 and Chrome Canary 92).
// 2021-02-18: Change blending equation to preserve alpha in output buffer. // 2021-02-18: Change blending equation to preserve alpha in output buffer.
// 2021-01-28: Initial version. // 2021-01-28: Initial version.
@ -22,11 +23,16 @@
#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))) #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)))
#if defined(__EMSCRIPTEN__) && !HAS_EMSCRIPTEN_VERSION(2, 0, 20)
#error "Requires at least emscripten 2.0.20"
#endif
// Dear ImGui prototypes from imgui_internal.h // Dear ImGui prototypes from imgui_internal.h
extern ImGuiID ImHashData(const void* data_p, size_t data_size, ImU32 seed = 0); extern ImGuiID ImHashData(const void* data_p, size_t data_size, ImU32 seed = 0);
// WebGPU data // WebGPU data
static WGPUDevice g_wgpuDevice = NULL; static WGPUDevice g_wgpuDevice = NULL;
static WGPUQueue g_defaultQueue = NULL;
static WGPUTextureFormat g_renderTargetFormat = WGPUTextureFormat_Undefined; static WGPUTextureFormat g_renderTargetFormat = WGPUTextureFormat_Undefined;
static WGPURenderPipeline g_pipelineState = NULL; static WGPURenderPipeline g_pipelineState = NULL;
@ -37,9 +43,9 @@ struct RenderResources
WGPUSampler Sampler; // Sampler for the font texture WGPUSampler Sampler; // Sampler for the font texture
WGPUBuffer Uniforms; // Shader uniforms WGPUBuffer Uniforms; // Shader uniforms
WGPUBindGroup CommonBindGroup; // Resources bind-group to bind the common resources to pipeline WGPUBindGroup CommonBindGroup; // Resources bind-group to bind the common resources to pipeline
WGPUBindGroupLayout ImageBindGroupLayout; // Bind group layout for image textures
ImGuiStorage ImageBindGroups; // Resources bind-group to bind the font/image resources to pipeline (this is a key->value map) ImGuiStorage ImageBindGroups; // Resources bind-group to bind the font/image resources to pipeline (this is a key->value map)
WGPUBindGroup ImageBindGroup; // Default font-resource of Dear ImGui WGPUBindGroup ImageBindGroup; // Default font-resource of Dear ImGui
WGPUBindGroupLayout ImageBindGroupLayout; // Cache layout used for the image bind group. Avoids allocating unnecessary JS objects when working with WebASM
}; };
static RenderResources g_resources; static RenderResources g_resources;
@ -241,8 +247,8 @@ static void SafeRelease(RenderResources& res)
SafeRelease(res.Sampler); SafeRelease(res.Sampler);
SafeRelease(res.Uniforms); SafeRelease(res.Uniforms);
SafeRelease(res.CommonBindGroup); SafeRelease(res.CommonBindGroup);
SafeRelease(res.ImageBindGroupLayout);
SafeRelease(res.ImageBindGroup); SafeRelease(res.ImageBindGroup);
SafeRelease(res.ImageBindGroupLayout);
}; };
static void SafeRelease(FrameResources& res) static void SafeRelease(FrameResources& res)
@ -296,23 +302,21 @@ static void ImGui_ImplWGPU_SetupRenderState(ImDrawData* draw_data, WGPURenderPas
{ 0.0f, 0.0f, 0.5f, 0.0f }, { 0.0f, 0.0f, 0.5f, 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f }, { (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f },
}; };
wgpuQueueWriteBuffer(wgpuDeviceGetDefaultQueue(g_wgpuDevice), g_resources.Uniforms, 0, mvp, sizeof(mvp)); wgpuQueueWriteBuffer(g_defaultQueue, g_resources.Uniforms, 0, mvp, sizeof(mvp));
} }
// Setup viewport // Setup viewport
wgpuRenderPassEncoderSetViewport(ctx, 0, 0, draw_data->DisplaySize.x, draw_data->DisplaySize.y, 0, 1); wgpuRenderPassEncoderSetViewport(ctx, 0, 0, draw_data->DisplaySize.x, draw_data->DisplaySize.y, 0, 1);
// Bind shader and vertex buffers // Bind shader and vertex buffers
unsigned int stride = sizeof(ImDrawVert); wgpuRenderPassEncoderSetVertexBuffer(ctx, 0, fr->VertexBuffer, 0, 0);
unsigned int offset = 0; wgpuRenderPassEncoderSetIndexBuffer(ctx, fr->IndexBuffer, sizeof(ImDrawIdx) == 2 ? WGPUIndexFormat_Uint16 : WGPUIndexFormat_Uint32, 0, 0);
wgpuRenderPassEncoderSetVertexBuffer(ctx, 0, fr->VertexBuffer, offset, fr->VertexBufferSize * stride);
wgpuRenderPassEncoderSetIndexBuffer(ctx, fr->IndexBuffer, sizeof(ImDrawIdx) == 2 ? WGPUIndexFormat_Uint16 : WGPUIndexFormat_Uint32, 0, fr->IndexBufferSize * sizeof(ImDrawIdx));
wgpuRenderPassEncoderSetPipeline(ctx, g_pipelineState); wgpuRenderPassEncoderSetPipeline(ctx, g_pipelineState);
wgpuRenderPassEncoderSetBindGroup(ctx, 0, g_resources.CommonBindGroup, 0, NULL); wgpuRenderPassEncoderSetBindGroup(ctx, 0, g_resources.CommonBindGroup, 0, NULL);
// Setup blend factor // Setup blend factor
WGPUColor blend_color = { 0.f, 0.f, 0.f, 0.f }; WGPUColor blend_color = { 0.f, 0.f, 0.f, 0.f };
wgpuRenderPassEncoderSetBlendColor(ctx, &blend_color); wgpuRenderPassEncoderSetBlendConstant(ctx, &blend_color);
} }
// Render function // Render function
@ -331,7 +335,11 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
// Create and grow vertex/index buffers if needed // Create and grow vertex/index buffers if needed
if (fr->VertexBuffer == NULL || fr->VertexBufferSize < draw_data->TotalVtxCount) if (fr->VertexBuffer == NULL || fr->VertexBufferSize < draw_data->TotalVtxCount)
{ {
SafeRelease(fr->VertexBuffer); if (fr->VertexBuffer)
{
wgpuBufferDestroy(fr->VertexBuffer);
wgpuBufferRelease(fr->VertexBuffer);
}
SafeRelease(fr->VertexBufferHost); SafeRelease(fr->VertexBufferHost);
fr->VertexBufferSize = draw_data->TotalVtxCount + 5000; fr->VertexBufferSize = draw_data->TotalVtxCount + 5000;
@ -351,7 +359,11 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
} }
if (fr->IndexBuffer == NULL || fr->IndexBufferSize < draw_data->TotalIdxCount) if (fr->IndexBuffer == NULL || fr->IndexBufferSize < draw_data->TotalIdxCount)
{ {
SafeRelease(fr->IndexBuffer); if (fr->IndexBuffer)
{
wgpuBufferDestroy(fr->IndexBuffer);
wgpuBufferRelease(fr->IndexBuffer);
}
SafeRelease(fr->IndexBufferHost); SafeRelease(fr->IndexBufferHost);
fr->IndexBufferSize = draw_data->TotalIdxCount + 10000; fr->IndexBufferSize = draw_data->TotalIdxCount + 10000;
@ -383,8 +395,8 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
} }
int64_t vb_write_size = ((char*)vtx_dst - (char*)fr->VertexBufferHost + 3) & ~3; int64_t vb_write_size = ((char*)vtx_dst - (char*)fr->VertexBufferHost + 3) & ~3;
int64_t ib_write_size = ((char*)idx_dst - (char*)fr->IndexBufferHost + 3) & ~3; int64_t ib_write_size = ((char*)idx_dst - (char*)fr->IndexBufferHost + 3) & ~3;
wgpuQueueWriteBuffer(wgpuDeviceGetDefaultQueue(g_wgpuDevice), fr->VertexBuffer, 0, fr->VertexBufferHost, vb_write_size); wgpuQueueWriteBuffer(g_defaultQueue, fr->VertexBuffer, 0, fr->VertexBufferHost, vb_write_size);
wgpuQueueWriteBuffer(wgpuDeviceGetDefaultQueue(g_wgpuDevice), fr->IndexBuffer, 0, fr->IndexBufferHost, ib_write_size); wgpuQueueWriteBuffer(g_defaultQueue, fr->IndexBuffer, 0, fr->IndexBufferHost, ib_write_size);
// Setup desired render state // Setup desired render state
ImGui_ImplWGPU_SetupRenderState(draw_data, pass_encoder, fr); ImGui_ImplWGPU_SetupRenderState(draw_data, pass_encoder, fr);
@ -439,18 +451,6 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
} }
} }
static WGPUBuffer ImGui_ImplWGPU_CreateBufferFromData(const WGPUDevice& device, const void* data, uint64_t size, WGPUBufferUsage usage)
{
WGPUBufferDescriptor descriptor = {};
descriptor.size = size;
descriptor.usage = usage | WGPUBufferUsage_CopyDst;
WGPUBuffer buffer = wgpuDeviceCreateBuffer(device, &descriptor);
WGPUQueue queue = wgpuDeviceGetDefaultQueue(g_wgpuDevice);
wgpuQueueWriteBuffer(queue, buffer, 0, data, size);
return buffer;
}
static void ImGui_ImplWGPU_CreateFontsTexture() static void ImGui_ImplWGPU_CreateFontsTexture()
{ {
// Build texture atlas // Build texture atlas
@ -466,7 +466,7 @@ static void ImGui_ImplWGPU_CreateFontsTexture()
tex_desc.dimension = WGPUTextureDimension_2D; tex_desc.dimension = WGPUTextureDimension_2D;
tex_desc.size.width = width; tex_desc.size.width = width;
tex_desc.size.height = height; tex_desc.size.height = height;
tex_desc.size.depth = 1; tex_desc.size.depthOrArrayLayers = 1;
tex_desc.sampleCount = 1; tex_desc.sampleCount = 1;
tex_desc.format = WGPUTextureFormat_RGBA8Unorm; tex_desc.format = WGPUTextureFormat_RGBA8Unorm;
tex_desc.mipLevelCount = 1; tex_desc.mipLevelCount = 1;
@ -486,34 +486,17 @@ static void ImGui_ImplWGPU_CreateFontsTexture()
// Upload texture data // Upload texture data
{ {
WGPUBuffer staging_buffer = ImGui_ImplWGPU_CreateBufferFromData(g_wgpuDevice, pixels, (uint32_t)(width * size_pp * height), WGPUBufferUsage_CopySrc); WGPUImageCopyTexture dst_view = {};
dst_view.texture = g_resources.FontTexture;
WGPUBufferCopyView bufferCopyView = {}; dst_view.mipLevel = 0;
bufferCopyView.buffer = staging_buffer; dst_view.origin = { 0, 0, 0 };
bufferCopyView.layout.offset = 0; dst_view.aspect = WGPUTextureAspect_All;
bufferCopyView.layout.bytesPerRow = width * size_pp; WGPUTextureDataLayout layout = {};
bufferCopyView.layout.rowsPerImage = height; layout.offset = 0;
layout.bytesPerRow = width * size_pp;
WGPUTextureCopyView textureCopyView = {}; layout.rowsPerImage = height;
textureCopyView.texture = g_resources.FontTexture; WGPUExtent3D size = { static_cast<uint32_t>(width), static_cast<uint32_t>(height), 1 };
textureCopyView.mipLevel = 0; wgpuQueueWriteTexture(g_defaultQueue, &dst_view, pixels, (uint32_t)(width * size_pp * height), &layout, &size);
textureCopyView.origin = { 0, 0, 0 };
#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
textureCopyView.aspect = WGPUTextureAspect_All;
#endif
WGPUExtent3D copySize = { (uint32_t)width, (uint32_t)height, 1 };
WGPUCommandEncoderDescriptor enc_desc = {};
WGPUCommandEncoder encoder = wgpuDeviceCreateCommandEncoder(g_wgpuDevice, &enc_desc);
wgpuCommandEncoderCopyBufferToTexture(encoder, &bufferCopyView, &textureCopyView, &copySize);
WGPUCommandBufferDescriptor cmd_buf_desc = {};
WGPUCommandBuffer copy = wgpuCommandEncoderFinish(encoder, &cmd_buf_desc);
WGPUQueue queue = wgpuDeviceGetDefaultQueue(g_wgpuDevice);
wgpuQueueSubmit(queue, 1, &copy);
wgpuCommandEncoderRelease(encoder);
wgpuBufferRelease(staging_buffer);
} }
// Create the associated sampler // Create the associated sampler
@ -525,9 +508,7 @@ static void ImGui_ImplWGPU_CreateFontsTexture()
sampler_desc.addressModeU = WGPUAddressMode_Repeat; sampler_desc.addressModeU = WGPUAddressMode_Repeat;
sampler_desc.addressModeV = WGPUAddressMode_Repeat; sampler_desc.addressModeV = WGPUAddressMode_Repeat;
sampler_desc.addressModeW = WGPUAddressMode_Repeat; sampler_desc.addressModeW = WGPUAddressMode_Repeat;
#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
sampler_desc.maxAnisotropy = 1; sampler_desc.maxAnisotropy = 1;
#endif
g_resources.Sampler = wgpuDeviceCreateSampler(g_wgpuDevice, &sampler_desc); g_resources.Sampler = wgpuDeviceCreateSampler(g_wgpuDevice, &sampler_desc);
} }
@ -557,139 +538,82 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
ImGui_ImplWGPU_InvalidateDeviceObjects(); ImGui_ImplWGPU_InvalidateDeviceObjects();
// Create render pipeline // Create render pipeline
WGPURenderPipelineDescriptor graphics_pipeline_desc = {}; WGPURenderPipelineDescriptor2 graphics_pipeline_desc = {};
graphics_pipeline_desc.primitiveTopology = WGPUPrimitiveTopology_TriangleList; graphics_pipeline_desc.primitive.topology = WGPUPrimitiveTopology_TriangleList;
graphics_pipeline_desc.sampleCount = 1; graphics_pipeline_desc.primitive.stripIndexFormat = WGPUIndexFormat_Undefined;
graphics_pipeline_desc.sampleMask = UINT_MAX; graphics_pipeline_desc.primitive.frontFace = WGPUFrontFace_CW;
graphics_pipeline_desc.primitive.cullMode = WGPUCullMode_None;
WGPUBindGroupLayoutEntry common_bg_layout_entries[2] = {}; graphics_pipeline_desc.multisample.count = 1;
common_bg_layout_entries[0].binding = 0; graphics_pipeline_desc.multisample.mask = UINT_MAX;
common_bg_layout_entries[0].visibility = WGPUShaderStage_Vertex; graphics_pipeline_desc.multisample.alphaToCoverageEnabled = false;
#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14) graphics_pipeline_desc.layout = nullptr; // Use automatic layout generation
common_bg_layout_entries[0].buffer.type = WGPUBufferBindingType_Uniform;
#else
common_bg_layout_entries[0].type = WGPUBindingType_UniformBuffer;
#endif
common_bg_layout_entries[1].binding = 1;
common_bg_layout_entries[1].visibility = WGPUShaderStage_Fragment;
#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
common_bg_layout_entries[1].sampler.type = WGPUSamplerBindingType_Filtering;
#else
common_bg_layout_entries[1].type = WGPUBindingType_Sampler;
#endif
WGPUBindGroupLayoutEntry image_bg_layout_entries[1] = {};
image_bg_layout_entries[0].binding = 0;
image_bg_layout_entries[0].visibility = WGPUShaderStage_Fragment;
#if !defined(__EMSCRIPTEN__) || HAS_EMSCRIPTEN_VERSION(2, 0, 14)
image_bg_layout_entries[0].texture.sampleType = WGPUTextureSampleType_Float;
image_bg_layout_entries[0].texture.viewDimension = WGPUTextureViewDimension_2D;
#else
image_bg_layout_entries[0].type = WGPUBindingType_SampledTexture;
#endif
WGPUBindGroupLayoutDescriptor common_bg_layout_desc = {};
common_bg_layout_desc.entryCount = 2;
common_bg_layout_desc.entries = common_bg_layout_entries;
WGPUBindGroupLayoutDescriptor image_bg_layout_desc = {};
image_bg_layout_desc.entryCount = 1;
image_bg_layout_desc.entries = image_bg_layout_entries;
WGPUBindGroupLayout bg_layouts[2];
bg_layouts[0] = wgpuDeviceCreateBindGroupLayout(g_wgpuDevice, &common_bg_layout_desc);
bg_layouts[1] = wgpuDeviceCreateBindGroupLayout(g_wgpuDevice, &image_bg_layout_desc);
WGPUPipelineLayoutDescriptor layout_desc = {};
layout_desc.bindGroupLayoutCount = 2;
layout_desc.bindGroupLayouts = bg_layouts;
graphics_pipeline_desc.layout = wgpuDeviceCreatePipelineLayout(g_wgpuDevice, &layout_desc);
// Create the vertex shader // Create the vertex shader
WGPUProgrammableStageDescriptor vertex_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__glsl_shader_vert_spv, sizeof(__glsl_shader_vert_spv) / sizeof(uint32_t)); WGPUProgrammableStageDescriptor vertex_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__glsl_shader_vert_spv, sizeof(__glsl_shader_vert_spv) / sizeof(uint32_t));
graphics_pipeline_desc.vertexStage = vertex_shader_desc; graphics_pipeline_desc.vertex.module = vertex_shader_desc.module;
graphics_pipeline_desc.vertex.entryPoint = vertex_shader_desc.entryPoint;
// Vertex input configuration // Vertex input configuration
WGPUVertexAttributeDescriptor attribute_binding_desc[] = WGPUVertexAttribute attribute_desc[] =
{ {
{ WGPUVertexFormat_Float2, (uint64_t)IM_OFFSETOF(ImDrawVert, pos), 0 }, { WGPUVertexFormat_Float32x2, (uint64_t)IM_OFFSETOF(ImDrawVert, pos), 0 },
{ WGPUVertexFormat_Float2, (uint64_t)IM_OFFSETOF(ImDrawVert, uv), 1 }, { WGPUVertexFormat_Float32x2, (uint64_t)IM_OFFSETOF(ImDrawVert, uv), 1 },
{ WGPUVertexFormat_UChar4Norm, (uint64_t)IM_OFFSETOF(ImDrawVert, col), 2 }, { WGPUVertexFormat_Unorm8x4, (uint64_t)IM_OFFSETOF(ImDrawVert, col), 2 },
}; };
WGPUVertexBufferLayoutDescriptor buffer_binding_desc; WGPUVertexBufferLayout buffer_layouts[1];
buffer_binding_desc.arrayStride = sizeof(ImDrawVert); buffer_layouts[0].arrayStride = sizeof(ImDrawVert);
buffer_binding_desc.stepMode = WGPUInputStepMode_Vertex; buffer_layouts[0].stepMode = WGPUInputStepMode_Vertex;
buffer_binding_desc.attributeCount = 3; buffer_layouts[0].attributeCount = 3;
buffer_binding_desc.attributes = attribute_binding_desc; buffer_layouts[0].attributes = attribute_desc;
WGPUVertexStateDescriptor vertex_state_desc = {}; graphics_pipeline_desc.vertex.bufferCount = 1;
vertex_state_desc.indexFormat = WGPUIndexFormat_Undefined; graphics_pipeline_desc.vertex.buffers = buffer_layouts;
vertex_state_desc.vertexBufferCount = 1;
vertex_state_desc.vertexBuffers = &buffer_binding_desc;
graphics_pipeline_desc.vertexState = &vertex_state_desc;
// Create the pixel shader // Create the pixel shader
WGPUProgrammableStageDescriptor pixel_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__glsl_shader_frag_spv, sizeof(__glsl_shader_frag_spv) / sizeof(uint32_t)); WGPUProgrammableStageDescriptor pixel_shader_desc = ImGui_ImplWGPU_CreateShaderModule(__glsl_shader_frag_spv, sizeof(__glsl_shader_frag_spv) / sizeof(uint32_t));
graphics_pipeline_desc.fragmentStage = &pixel_shader_desc;
// Create the blending setup // Create the blending setup
WGPUColorStateDescriptor color_state = {}; WGPUBlendState blend_state = {};
{ blend_state.alpha.operation = WGPUBlendOperation_Add;
color_state.format = g_renderTargetFormat; blend_state.alpha.srcFactor = WGPUBlendFactor_One;
color_state.alphaBlend.operation = WGPUBlendOperation_Add; blend_state.alpha.dstFactor = WGPUBlendFactor_OneMinusSrcAlpha;
color_state.alphaBlend.srcFactor = WGPUBlendFactor_One; blend_state.color.operation = WGPUBlendOperation_Add;
color_state.alphaBlend.dstFactor = WGPUBlendFactor_OneMinusSrcAlpha; blend_state.color.srcFactor = WGPUBlendFactor_SrcAlpha;
color_state.colorBlend.operation = WGPUBlendOperation_Add; blend_state.color.dstFactor = WGPUBlendFactor_OneMinusSrcAlpha;
color_state.colorBlend.srcFactor = WGPUBlendFactor_SrcAlpha;
color_state.colorBlend.dstFactor = WGPUBlendFactor_OneMinusSrcAlpha; WGPUColorTargetState color_state = {};
color_state.writeMask = WGPUColorWriteMask_All; color_state.format = g_renderTargetFormat;
color_state.blend = &blend_state;
graphics_pipeline_desc.colorStateCount = 1; color_state.writeMask = WGPUColorWriteMask_All;
graphics_pipeline_desc.colorStates = &color_state;
graphics_pipeline_desc.alphaToCoverageEnabled = false; WGPUFragmentState fragment_state = {};
} fragment_state.module = pixel_shader_desc.module;
fragment_state.entryPoint = pixel_shader_desc.entryPoint;
// Create the rasterizer state fragment_state.targetCount = 1;
WGPURasterizationStateDescriptor raster_desc = {}; fragment_state.targets = &color_state;
{
raster_desc.cullMode = WGPUCullMode_None; graphics_pipeline_desc.fragment = &fragment_state;
raster_desc.frontFace = WGPUFrontFace_CW;
raster_desc.depthBias = 0;
raster_desc.depthBiasClamp = 0;
raster_desc.depthBiasSlopeScale = 0;
graphics_pipeline_desc.rasterizationState = &raster_desc;
}
// Create depth-stencil State // Create depth-stencil State
WGPUDepthStencilStateDescriptor depth_desc = {}; WGPUDepthStencilState depth_stencil_state = {};
{ depth_stencil_state.depthBias = 0;
// Configure disabled state depth_stencil_state.depthBiasClamp = 0;
depth_desc.format = WGPUTextureFormat_Undefined; depth_stencil_state.depthBiasSlopeScale = 0;
depth_desc.depthWriteEnabled = true;
depth_desc.depthCompare = WGPUCompareFunction_Always;
depth_desc.stencilReadMask = 0;
depth_desc.stencilWriteMask = 0;
depth_desc.stencilBack.compare = WGPUCompareFunction_Always;
depth_desc.stencilBack.failOp = WGPUStencilOperation_Keep;
depth_desc.stencilBack.depthFailOp = WGPUStencilOperation_Keep;
depth_desc.stencilBack.passOp = WGPUStencilOperation_Keep;
depth_desc.stencilFront.compare = WGPUCompareFunction_Always;
depth_desc.stencilFront.failOp = WGPUStencilOperation_Keep;
depth_desc.stencilFront.depthFailOp = WGPUStencilOperation_Keep;
depth_desc.stencilFront.passOp = WGPUStencilOperation_Keep;
// No depth buffer corresponds to no configuration
graphics_pipeline_desc.depthStencilState = NULL;
}
g_pipelineState = wgpuDeviceCreateRenderPipeline(g_wgpuDevice, &graphics_pipeline_desc); // Configure disabled depth-stencil state
graphics_pipeline_desc.depthStencil = nullptr;
g_pipelineState = wgpuDeviceCreateRenderPipeline2(g_wgpuDevice, &graphics_pipeline_desc);
ImGui_ImplWGPU_CreateFontsTexture(); ImGui_ImplWGPU_CreateFontsTexture();
ImGui_ImplWGPU_CreateUniformBuffer(); ImGui_ImplWGPU_CreateUniformBuffer();
// Create resource bind group // Create resource bind group
WGPUBindGroupLayout bg_layouts[2];
bg_layouts[0] = wgpuRenderPipelineGetBindGroupLayout(g_pipelineState, 0);
bg_layouts[1] = wgpuRenderPipelineGetBindGroupLayout(g_pipelineState, 1);
WGPUBindGroupEntry common_bg_entries[] = WGPUBindGroupEntry common_bg_entries[] =
{ {
{ 0, g_resources.Uniforms, 0, sizeof(Uniforms), 0, 0 }, { 0, g_resources.Uniforms, 0, sizeof(Uniforms), 0, 0 },
@ -701,10 +625,10 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
common_bg_descriptor.entryCount = sizeof(common_bg_entries) / sizeof(WGPUBindGroupEntry); common_bg_descriptor.entryCount = sizeof(common_bg_entries) / sizeof(WGPUBindGroupEntry);
common_bg_descriptor.entries = common_bg_entries; common_bg_descriptor.entries = common_bg_entries;
g_resources.CommonBindGroup = wgpuDeviceCreateBindGroup(g_wgpuDevice, &common_bg_descriptor); g_resources.CommonBindGroup = wgpuDeviceCreateBindGroup(g_wgpuDevice, &common_bg_descriptor);
g_resources.ImageBindGroupLayout = bg_layouts[1];
WGPUBindGroup image_bind_group = ImGui_ImplWGPU_CreateImageBindGroup(bg_layouts[1], g_resources.FontTextureView); WGPUBindGroup image_bind_group = ImGui_ImplWGPU_CreateImageBindGroup(bg_layouts[1], g_resources.FontTextureView);
g_resources.ImageBindGroup = image_bind_group; g_resources.ImageBindGroup = image_bind_group;
g_resources.ImageBindGroupLayout = bg_layouts[1];
g_resources.ImageBindGroups.SetVoidPtr(ImHashData(&g_resources.FontTextureView, sizeof(ImTextureID)), image_bind_group); g_resources.ImageBindGroups.SetVoidPtr(ImHashData(&g_resources.FontTextureView, sizeof(ImTextureID)), image_bind_group);
SafeRelease(vertex_shader_desc.module); SafeRelease(vertex_shader_desc.module);
@ -737,6 +661,7 @@ bool ImGui_ImplWGPU_Init(WGPUDevice device, int num_frames_in_flight, WGPUTextur
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes. io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
g_wgpuDevice = device; g_wgpuDevice = device;
g_defaultQueue = wgpuDeviceGetQueue(g_wgpuDevice);
g_renderTargetFormat = rt_format; g_renderTargetFormat = rt_format;
g_pFrameResources = new FrameResources[num_frames_in_flight]; g_pFrameResources = new FrameResources[num_frames_in_flight];
g_numFramesInFlight = num_frames_in_flight; g_numFramesInFlight = num_frames_in_flight;
@ -747,9 +672,9 @@ bool ImGui_ImplWGPU_Init(WGPUDevice device, int num_frames_in_flight, WGPUTextur
g_resources.Sampler = NULL; g_resources.Sampler = NULL;
g_resources.Uniforms = NULL; g_resources.Uniforms = NULL;
g_resources.CommonBindGroup = NULL; g_resources.CommonBindGroup = NULL;
g_resources.ImageBindGroupLayout = NULL;
g_resources.ImageBindGroups.Data.reserve(100); g_resources.ImageBindGroups.Data.reserve(100);
g_resources.ImageBindGroup = NULL; g_resources.ImageBindGroup = NULL;
g_resources.ImageBindGroupLayout = NULL;
// Create buffers with a default size (they will later be grown as needed) // Create buffers with a default size (they will later be grown as needed)
for (int i = 0; i < num_frames_in_flight; i++) for (int i = 0; i < num_frames_in_flight; i++)
@ -771,6 +696,7 @@ void ImGui_ImplWGPU_Shutdown()
ImGui_ImplWGPU_InvalidateDeviceObjects(); ImGui_ImplWGPU_InvalidateDeviceObjects();
delete[] g_pFrameResources; delete[] g_pFrameResources;
g_pFrameResources = NULL; g_pFrameResources = NULL;
wgpuQueueRelease(g_defaultQueue);
g_wgpuDevice = NULL; g_wgpuDevice = NULL;
g_numFramesInFlight = 0; g_numFramesInFlight = 0;
g_frameIndex = UINT_MAX; g_frameIndex = UINT_MAX;

1
docs/CHANGELOG.txt
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@ -83,6 +83,7 @@ Other Changes:
entering the rendering function. (#4045) [@Nemirtingas] entering the rendering function. (#4045) [@Nemirtingas]
- Backends: Vulkan: Fix mapped memory Vulkan validation error when buffer sizes are not multiple of - Backends: Vulkan: Fix mapped memory Vulkan validation error when buffer sizes are not multiple of
VkPhysicalDeviceLimits::nonCoherentAtomSize. (#3957) [@AgentX1994] VkPhysicalDeviceLimits::nonCoherentAtomSize. (#3957) [@AgentX1994]
- Backends: WebGPU: Update to latest specs (Chrome Canary 92 and Emscripten 2.0.20). (#4116, #3632) [@bfierz, @Kangz]
- Backends: OpenGL3: Don't try to read GL_CLIP_ORIGIN unless we're OpenGL 4.5. (#3998, #2366, #2186) [@s7jones] - Backends: OpenGL3: Don't try to read GL_CLIP_ORIGIN unless we're OpenGL 4.5. (#3998, #2366, #2186) [@s7jones]
- Examples: OpenGL: Add OpenGL ES 2.0 support to modern GL examples. (#2837, #3951) [@lethal-guitar, @hinxx] - Examples: OpenGL: Add OpenGL ES 2.0 support to modern GL examples. (#2837, #3951) [@lethal-guitar, @hinxx]
- Examples: Vulkan: Rebuild swapchain on VK_SUBOPTIMAL_KHR. (#3881) - Examples: Vulkan: Rebuild swapchain on VK_SUBOPTIMAL_KHR. (#3881)

8
examples/example_emscripten_wgpu/main.cpp
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@ -147,7 +147,7 @@ static void main_loop(void* window)
wgpu_swap_chain_height = height; wgpu_swap_chain_height = height;
WGPUSwapChainDescriptor swap_chain_desc = {}; WGPUSwapChainDescriptor swap_chain_desc = {};
swap_chain_desc.usage = WGPUTextureUsage_OutputAttachment; swap_chain_desc.usage = WGPUTextureUsage_RenderAttachment;
swap_chain_desc.format = WGPUTextureFormat_RGBA8Unorm; swap_chain_desc.format = WGPUTextureFormat_RGBA8Unorm;
swap_chain_desc.width = width; swap_chain_desc.width = width;
swap_chain_desc.height = height; swap_chain_desc.height = height;
@ -202,11 +202,11 @@ static void main_loop(void* window)
// Rendering // Rendering
ImGui::Render(); ImGui::Render();
WGPURenderPassColorAttachmentDescriptor color_attachments = {}; WGPURenderPassColorAttachment color_attachments = {};
color_attachments.loadOp = WGPULoadOp_Clear; color_attachments.loadOp = WGPULoadOp_Clear;
color_attachments.storeOp = WGPUStoreOp_Store; color_attachments.storeOp = WGPUStoreOp_Store;
color_attachments.clearColor = { clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w }; color_attachments.clearColor = { clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w };
color_attachments.attachment = wgpuSwapChainGetCurrentTextureView(wgpu_swap_chain); color_attachments.view = wgpuSwapChainGetCurrentTextureView(wgpu_swap_chain);
WGPURenderPassDescriptor render_pass_desc = {}; WGPURenderPassDescriptor render_pass_desc = {};
render_pass_desc.colorAttachmentCount = 1; render_pass_desc.colorAttachmentCount = 1;
render_pass_desc.colorAttachments = &color_attachments; render_pass_desc.colorAttachments = &color_attachments;
@ -221,7 +221,7 @@ static void main_loop(void* window)
WGPUCommandBufferDescriptor cmd_buffer_desc = {}; WGPUCommandBufferDescriptor cmd_buffer_desc = {};
WGPUCommandBuffer cmd_buffer = wgpuCommandEncoderFinish(encoder, &cmd_buffer_desc); WGPUCommandBuffer cmd_buffer = wgpuCommandEncoderFinish(encoder, &cmd_buffer_desc);
WGPUQueue queue = wgpuDeviceGetDefaultQueue(wgpu_device); WGPUQueue queue = wgpuDeviceGetQueue(wgpu_device);
wgpuQueueSubmit(queue, 1, &cmd_buffer); wgpuQueueSubmit(queue, 1, &cmd_buffer);
} }

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