Backends, Examples: Added support for WebGPU and corresponding example (#3632)
(Squashed 11 commits)docking
Basil Fierz
4 years ago
committed by
ocornut
parent
6487860aae
commit
5853fbd68b
@ -0,0 +1,783 @@
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// dear imgui: Renderer for WebGPU
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// This needs to be used along with a Platform Binding (e.g. GLFW)
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// Implemented features:
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// [X] Renderer: User texture binding. Use 'WGPUTextureView' as ImTextureID. Read the FAQ about ImTextureID!
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// [X] Renderer: Support for large meshes (64k+ vertices) with 16-bit indices.
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// You can copy and use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
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// Read online: https://github.com/ocornut/imgui/tree/master/docs
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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#include "imgui.h"
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#include "imgui_impl_wgpu.h"
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// CRT
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#include <limits.h>
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// WebGPU
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#include <webgpu/webgpu.h>
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// ImGui prototypes
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ImGuiID ImHashData(const void* data_p, size_t data_size, ImU32 seed = 0);
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// WebGPU data
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static WGPUDevice g_wgpuDevice = NULL;
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static WGPUTextureFormat g_renderTargetFormat = WGPUTextureFormat_Undefined;
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static WGPURenderPipeline g_pipelineState = NULL;
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struct RenderResources
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{
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// Font texture
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WGPUTexture FontTexture;
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// Texture view for font texture
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WGPUTextureView FontTextureView;
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// Sampler for the font texture
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WGPUSampler Sampler;
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// Shader uniforms
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WGPUBuffer Uniforms;
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// Resources bind-group to bind the common resources to pipeline
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WGPUBindGroup CommonBindGroup;
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// Bind group layout for image textures
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WGPUBindGroupLayout ImageBindGroupLayout;
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// Resources bind-group to bind the font/image resources to pipeline
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ImGuiStorage ImageBindGroups;
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// Default font-resource of ImGui
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WGPUBindGroup ImageBindGroup;
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};
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static RenderResources g_resources;
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struct FrameResources
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{
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WGPUBuffer IndexBuffer;
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WGPUBuffer VertexBuffer;
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ImDrawIdx* IndexBufferHost;
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ImDrawVert* VertexBufferHost;
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int IndexBufferSize;
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int VertexBufferSize;
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};
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static FrameResources* g_pFrameResources = NULL;
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static unsigned int g_numFramesInFlight = 0;
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static unsigned int g_frameIndex = UINT_MAX;
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struct Uniforms
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{
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float MVP[4][4];
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};
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//-----------------------------------------------------------------------------
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// SHADERS
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//-----------------------------------------------------------------------------
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// glsl_shader.vert, compiled with:
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// # glslangValidator -V -x -o glsl_shader.vert.u32 glsl_shader.vert
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/*
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#version 450 core
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layout(location = 0) in vec2 aPos;
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layout(location = 1) in vec2 aUV;
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layout(location = 2) in vec4 aColor;
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layout(set=0, binding = 0) uniform transform { mat4 mvp; };
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out gl_PerVertex { vec4 gl_Position; };
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layout(location = 0) out struct { vec4 Color; vec2 UV; } Out;
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void main()
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{
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Out.Color = aColor;
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Out.UV = aUV;
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gl_Position = mvp * vec4(aPos, 0, 1);
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}
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*/
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static uint32_t __glsl_shader_vert_spv[] =
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{
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0x07230203,0x00010000,0x00080007,0x0000002c,0x00000000,0x00020011,0x00000001,0x0006000b,
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0x00000001,0x4c534c47,0x6474732e,0x3035342e,0x00000000,0x0003000e,0x00000000,0x00000001,
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0x000a000f,0x00000000,0x00000004,0x6e69616d,0x00000000,0x0000000b,0x0000000f,0x00000015,
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0x0000001b,0x00000023,0x00030003,0x00000002,0x000001c2,0x00040005,0x00000004,0x6e69616d,
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0x00000000,0x00030005,0x00000009,0x00000000,0x00050006,0x00000009,0x00000000,0x6f6c6f43,
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0x00000072,0x00040006,0x00000009,0x00000001,0x00005655,0x00030005,0x0000000b,0x0074754f,
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0x00040005,0x0000000f,0x6c6f4361,0x0000726f,0x00030005,0x00000015,0x00565561,0x00060005,
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0x00000019,0x505f6c67,0x65567265,0x78657472,0x00000000,0x00060006,0x00000019,0x00000000,
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0x505f6c67,0x7469736f,0x006e6f69,0x00030005,0x0000001b,0x00000000,0x00050005,0x0000001d,
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0x6e617274,0x726f6673,0x0000006d,0x00040006,0x0000001d,0x00000000,0x0070766d,0x00030005,
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0x0000001f,0x00000000,0x00040005,0x00000023,0x736f5061,0x00000000,0x00040047,0x0000000b,
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0x0000001e,0x00000000,0x00040047,0x0000000f,0x0000001e,0x00000002,0x00040047,0x00000015,
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0x0000001e,0x00000001,0x00050048,0x00000019,0x00000000,0x0000000b,0x00000000,0x00030047,
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0x00000019,0x00000002,0x00040048,0x0000001d,0x00000000,0x00000005,0x00050048,0x0000001d,
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0x00000000,0x00000023,0x00000000,0x00050048,0x0000001d,0x00000000,0x00000007,0x00000010,
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0x00030047,0x0000001d,0x00000002,0x00040047,0x0000001f,0x00000022,0x00000000,0x00040047,
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0x0000001f,0x00000021,0x00000000,0x00040047,0x00000023,0x0000001e,0x00000000,0x00020013,
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0x00000002,0x00030021,0x00000003,0x00000002,0x00030016,0x00000006,0x00000020,0x00040017,
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0x00000007,0x00000006,0x00000004,0x00040017,0x00000008,0x00000006,0x00000002,0x0004001e,
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0x00000009,0x00000007,0x00000008,0x00040020,0x0000000a,0x00000003,0x00000009,0x0004003b,
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0x0000000a,0x0000000b,0x00000003,0x00040015,0x0000000c,0x00000020,0x00000001,0x0004002b,
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0x0000000c,0x0000000d,0x00000000,0x00040020,0x0000000e,0x00000001,0x00000007,0x0004003b,
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0x0000000e,0x0000000f,0x00000001,0x00040020,0x00000011,0x00000003,0x00000007,0x0004002b,
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0x0000000c,0x00000013,0x00000001,0x00040020,0x00000014,0x00000001,0x00000008,0x0004003b,
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0x00000014,0x00000015,0x00000001,0x00040020,0x00000017,0x00000003,0x00000008,0x0003001e,
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0x00000019,0x00000007,0x00040020,0x0000001a,0x00000003,0x00000019,0x0004003b,0x0000001a,
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0x0000001b,0x00000003,0x00040018,0x0000001c,0x00000007,0x00000004,0x0003001e,0x0000001d,
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0x0000001c,0x00040020,0x0000001e,0x00000002,0x0000001d,0x0004003b,0x0000001e,0x0000001f,
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0x00000002,0x00040020,0x00000020,0x00000002,0x0000001c,0x0004003b,0x00000014,0x00000023,
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0x00000001,0x0004002b,0x00000006,0x00000025,0x00000000,0x0004002b,0x00000006,0x00000026,
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0x3f800000,0x00050036,0x00000002,0x00000004,0x00000000,0x00000003,0x000200f8,0x00000005,
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0x0004003d,0x00000007,0x00000010,0x0000000f,0x00050041,0x00000011,0x00000012,0x0000000b,
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0x0000000d,0x0003003e,0x00000012,0x00000010,0x0004003d,0x00000008,0x00000016,0x00000015,
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0x00050041,0x00000017,0x00000018,0x0000000b,0x00000013,0x0003003e,0x00000018,0x00000016,
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0x00050041,0x00000020,0x00000021,0x0000001f,0x0000000d,0x0004003d,0x0000001c,0x00000022,
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0x00000021,0x0004003d,0x00000008,0x00000024,0x00000023,0x00050051,0x00000006,0x00000027,
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0x00000024,0x00000000,0x00050051,0x00000006,0x00000028,0x00000024,0x00000001,0x00070050,
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0x00000007,0x00000029,0x00000027,0x00000028,0x00000025,0x00000026,0x00050091,0x00000007,
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0x0000002a,0x00000022,0x00000029,0x00050041,0x00000011,0x0000002b,0x0000001b,0x0000000d,
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0x0003003e,0x0000002b,0x0000002a,0x000100fd,0x00010038
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};
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// glsl_shader.frag, compiled with:
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// # glslangValidator -V -x -o glsl_shader.frag.u32 glsl_shader.frag
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/*
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#version 450 core
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layout(location = 0) out vec4 fColor;
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layout(set=0, binding=1) uniform sampler s;
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layout(set=1, binding=0) uniform texture2D t;
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layout(location = 0) in struct { vec4 Color; vec2 UV; } In;
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void main()
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{
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fColor = In.Color * texture(sampler2D(t, s), In.UV.st);
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}
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*/
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static uint32_t __glsl_shader_frag_spv[] =
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{
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0x07230203,0x00010000,0x00080007,0x00000023,0x00000000,0x00020011,0x00000001,0x0006000b,
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0x00000001,0x4c534c47,0x6474732e,0x3035342e,0x00000000,0x0003000e,0x00000000,0x00000001,
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0x0007000f,0x00000004,0x00000004,0x6e69616d,0x00000000,0x00000009,0x0000000d,0x00030010,
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0x00000004,0x00000007,0x00030003,0x00000002,0x000001c2,0x00040005,0x00000004,0x6e69616d,
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0x00000000,0x00040005,0x00000009,0x6c6f4366,0x0000726f,0x00030005,0x0000000b,0x00000000,
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0x00050006,0x0000000b,0x00000000,0x6f6c6f43,0x00000072,0x00040006,0x0000000b,0x00000001,
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0x00005655,0x00030005,0x0000000d,0x00006e49,0x00030005,0x00000015,0x00000074,0x00030005,
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0x00000019,0x00000073,0x00040047,0x00000009,0x0000001e,0x00000000,0x00040047,0x0000000d,
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0x0000001e,0x00000000,0x00040047,0x00000015,0x00000022,0x00000001,0x00040047,0x00000015,
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0x00000021,0x00000000,0x00040047,0x00000019,0x00000022,0x00000000,0x00040047,0x00000019,
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0x00000021,0x00000001,0x00020013,0x00000002,0x00030021,0x00000003,0x00000002,0x00030016,
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0x00000006,0x00000020,0x00040017,0x00000007,0x00000006,0x00000004,0x00040020,0x00000008,
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0x00000003,0x00000007,0x0004003b,0x00000008,0x00000009,0x00000003,0x00040017,0x0000000a,
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0x00000006,0x00000002,0x0004001e,0x0000000b,0x00000007,0x0000000a,0x00040020,0x0000000c,
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0x00000001,0x0000000b,0x0004003b,0x0000000c,0x0000000d,0x00000001,0x00040015,0x0000000e,
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0x00000020,0x00000001,0x0004002b,0x0000000e,0x0000000f,0x00000000,0x00040020,0x00000010,
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0x00000001,0x00000007,0x00090019,0x00000013,0x00000006,0x00000001,0x00000000,0x00000000,
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0x00000000,0x00000001,0x00000000,0x00040020,0x00000014,0x00000000,0x00000013,0x0004003b,
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0x00000014,0x00000015,0x00000000,0x0002001a,0x00000017,0x00040020,0x00000018,0x00000000,
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0x00000017,0x0004003b,0x00000018,0x00000019,0x00000000,0x0003001b,0x0000001b,0x00000013,
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0x0004002b,0x0000000e,0x0000001d,0x00000001,0x00040020,0x0000001e,0x00000001,0x0000000a,
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0x00050036,0x00000002,0x00000004,0x00000000,0x00000003,0x000200f8,0x00000005,0x00050041,
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0x00000010,0x00000011,0x0000000d,0x0000000f,0x0004003d,0x00000007,0x00000012,0x00000011,
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0x0004003d,0x00000013,0x00000016,0x00000015,0x0004003d,0x00000017,0x0000001a,0x00000019,
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0x00050056,0x0000001b,0x0000001c,0x00000016,0x0000001a,0x00050041,0x0000001e,0x0000001f,
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0x0000000d,0x0000001d,0x0004003d,0x0000000a,0x00000020,0x0000001f,0x00050057,0x00000007,
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0x00000021,0x0000001c,0x00000020,0x00050085,0x00000007,0x00000022,0x00000012,0x00000021,
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0x0003003e,0x00000009,0x00000022,0x000100fd,0x00010038
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};
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static void SafeRelease(ImDrawIdx*& res)
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{
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if (res)
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delete[] res;
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res = NULL;
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}
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static void SafeRelease(ImDrawVert*& res)
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{
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if (res)
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delete[] res;
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res = NULL;
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}
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static void SafeRelease(WGPUBindGroupLayout& res)
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{
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if (res)
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wgpuBindGroupLayoutRelease(res);
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res = NULL;
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}
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static void SafeRelease(WGPUBindGroup& res)
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{
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if (res)
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wgpuBindGroupRelease(res);
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res = NULL;
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}
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static void SafeRelease(WGPUBuffer& res)
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{
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if (res)
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wgpuBufferRelease(res);
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res = NULL;
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}
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static void SafeRelease(WGPURenderPipeline& res)
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{
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if (res)
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wgpuRenderPipelineRelease(res);
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res = NULL;
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}
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static void SafeRelease(WGPUSampler& res)
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{
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if (res)
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wgpuSamplerRelease(res);
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res = NULL;
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}
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static void SafeRelease(WGPUShaderModule& res)
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{
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if (res)
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wgpuShaderModuleRelease(res);
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res = NULL;
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}
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static void SafeRelease(WGPUTextureView& res)
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{
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if (res)
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wgpuTextureViewRelease(res);
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res = NULL;
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}
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static void SafeRelease(WGPUTexture& res)
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{
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if (res)
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wgpuTextureRelease(res);
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res = NULL;
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}
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static void SafeRelease(RenderResources& res)
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{
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SafeRelease(res.FontTexture);
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SafeRelease(res.FontTextureView);
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SafeRelease(res.Sampler);
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SafeRelease(res.Uniforms);
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SafeRelease(res.CommonBindGroup);
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SafeRelease(res.ImageBindGroupLayout);
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SafeRelease(res.ImageBindGroup);
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};
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static void SafeRelease(FrameResources& res)
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{
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SafeRelease(res.IndexBuffer);
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SafeRelease(res.VertexBuffer);
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SafeRelease(res.IndexBufferHost);
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SafeRelease(res.VertexBufferHost);
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}
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static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModule(uint32_t* binary_data, uint32_t binary_data_size)
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{
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WGPUShaderModuleSPIRVDescriptor spirv_desc = {};
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spirv_desc.chain.sType = WGPUSType_ShaderModuleSPIRVDescriptor;
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spirv_desc.codeSize = binary_data_size;
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spirv_desc.code = binary_data;
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WGPUShaderModuleDescriptor desc;
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desc.nextInChain = reinterpret_cast<WGPUChainedStruct*>(&spirv_desc);
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WGPUProgrammableStageDescriptor stage_desc = {};
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stage_desc.module = wgpuDeviceCreateShaderModule(g_wgpuDevice, &desc);
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stage_desc.entryPoint = "main";
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return stage_desc;
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}
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static WGPUBindGroup ImGui_ImplWGPU_CreateImageBindGroup(WGPUBindGroupLayout layout, WGPUTextureView texture)
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{
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WGPUBindGroupEntry image_bg_entries[] = {
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{ 0, 0, 0, 0, 0, texture },
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};
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WGPUBindGroupDescriptor image_bg_descriptor = {};
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image_bg_descriptor.layout = layout;
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image_bg_descriptor.entryCount = sizeof(image_bg_entries) / sizeof(WGPUBindGroupEntry);
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image_bg_descriptor.entries = image_bg_entries;
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return wgpuDeviceCreateBindGroup(g_wgpuDevice, &image_bg_descriptor);
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}
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static void ImGui_ImplWGPU_SetupRenderState(ImDrawData* draw_data, WGPURenderPassEncoder ctx, FrameResources* fr)
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{
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// Setup orthographic projection matrix into our constant buffer
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// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right).
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{
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float L = draw_data->DisplayPos.x;
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float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
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float T = draw_data->DisplayPos.y;
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float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
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float mvp[4][4] =
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{
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{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
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{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
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{ 0.0f, 0.0f, 0.5f, 0.0f },
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{ (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f },
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};
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wgpuQueueWriteBuffer(wgpuDeviceGetDefaultQueue(g_wgpuDevice), g_resources.Uniforms, 0, mvp, sizeof(mvp));
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}
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// Setup viewport
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wgpuRenderPassEncoderSetViewport(ctx, 0, 0, draw_data->DisplaySize.x, draw_data->DisplaySize.y, 0, 1);
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// Bind shader and vertex buffers
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unsigned int stride = sizeof(ImDrawVert);
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unsigned int offset = 0;
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wgpuRenderPassEncoderSetVertexBuffer(ctx, 0, fr->VertexBuffer, offset, fr->VertexBufferSize * stride);
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wgpuRenderPassEncoderSetIndexBuffer(ctx, fr->IndexBuffer, sizeof(ImDrawIdx) == 2 ? WGPUIndexFormat_Uint16 : WGPUIndexFormat_Uint32, 0, fr->IndexBufferSize * sizeof(ImDrawIdx));
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wgpuRenderPassEncoderSetPipeline(ctx, g_pipelineState);
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wgpuRenderPassEncoderSetBindGroup(ctx, 0, g_resources.CommonBindGroup, 0, NULL);
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// Setup blend factor
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WGPUColor blend_color = { 0.f, 0.f, 0.f, 0.f };
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wgpuRenderPassEncoderSetBlendColor(ctx, &blend_color);
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}
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// Render function
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// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
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void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder pass_encoder)
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{
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// Avoid rendering when minimized
|
||||
if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
|
||||
return;
|
||||
|
||||
// FIXME: I'm assuming that this only gets called once per frame!
|
||||
// If not, we can't just re-allocate the IB or VB, we'll have to do a proper allocator.
|
||||
g_frameIndex = g_frameIndex + 1;
|
||||
FrameResources* fr = &g_pFrameResources[g_frameIndex % g_numFramesInFlight];
|
||||
|
||||
// Create and grow vertex/index buffers if needed
|
||||
if (fr->VertexBuffer == NULL || fr->VertexBufferSize < draw_data->TotalVtxCount)
|
||||
{
|
||||
SafeRelease(fr->VertexBuffer);
|
||||
SafeRelease(fr->VertexBufferHost);
|
||||
fr->VertexBufferSize = draw_data->TotalVtxCount + 5000;
|
||||
|
||||
WGPUBufferDescriptor vb_desc = {
|
||||
nullptr,
|
||||
"IMGUI Vertex buffer",
|
||||
WGPUBufferUsage_CopyDst | WGPUBufferUsage_Vertex,
|
||||
fr->VertexBufferSize * sizeof(ImDrawVert),
|
||||
false
|
||||
};
|
||||
fr->VertexBuffer = wgpuDeviceCreateBuffer(g_wgpuDevice, &vb_desc);
|
||||
if (!fr->VertexBuffer)
|
||||
return;
|
||||
|
||||
fr->VertexBufferHost = new ImDrawVert[fr->VertexBufferSize];
|
||||
}
|
||||
if (fr->IndexBuffer == NULL || fr->IndexBufferSize < draw_data->TotalIdxCount)
|
||||
{
|
||||
SafeRelease(fr->IndexBuffer);
|
||||
SafeRelease(fr->IndexBufferHost);
|
||||
fr->IndexBufferSize = draw_data->TotalIdxCount + 10000;
|
||||
|
||||
WGPUBufferDescriptor ib_desc = {
|
||||
nullptr,
|
||||
"IMGUI Index buffer",
|
||||
WGPUBufferUsage_CopyDst | WGPUBufferUsage_Index,
|
||||
fr->IndexBufferSize * sizeof(ImDrawIdx),
|
||||
false
|
||||
};
|
||||
fr->IndexBuffer = wgpuDeviceCreateBuffer(g_wgpuDevice, &ib_desc);
|
||||
if (!fr->IndexBuffer)
|
||||
return;
|
||||
|
||||
fr->IndexBufferHost = new ImDrawIdx[fr->IndexBufferSize];
|
||||
}
|
||||
|
||||
// Upload vertex/index data into a single contiguous GPU buffer
|
||||
ImDrawVert* vtx_dst = (ImDrawVert*)fr->VertexBufferHost;
|
||||
ImDrawIdx* idx_dst = (ImDrawIdx*)fr->IndexBufferHost;
|
||||
for (int n = 0; n < draw_data->CmdListsCount; n++)
|
||||
{
|
||||
const ImDrawList* cmd_list = draw_data->CmdLists[n];
|
||||
memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
|
||||
memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
|
||||
vtx_dst += cmd_list->VtxBuffer.Size;
|
||||
idx_dst += cmd_list->IdxBuffer.Size;
|
||||
}
|
||||
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;
|
||||
wgpuQueueWriteBuffer(wgpuDeviceGetDefaultQueue(g_wgpuDevice), fr->VertexBuffer, 0, fr->VertexBufferHost, vb_write_size);
|
||||
wgpuQueueWriteBuffer(wgpuDeviceGetDefaultQueue(g_wgpuDevice), fr->IndexBuffer, 0, fr->IndexBufferHost, ib_write_size);
|
||||
|
||||
// Setup desired render state
|
||||
ImGui_ImplWGPU_SetupRenderState(draw_data, pass_encoder, fr);
|
||||
|
||||
// Render command lists
|
||||
// (Because we merged all buffers into a single one, we maintain our own offset into them)
|
||||
int global_vtx_offset = 0;
|
||||
int global_idx_offset = 0;
|
||||
ImVec2 clip_off = draw_data->DisplayPos;
|
||||
for (int n = 0; n < draw_data->CmdListsCount; n++)
|
||||
{
|
||||
const ImDrawList* cmd_list = draw_data->CmdLists[n];
|
||||
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
|
||||
{
|
||||
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
|
||||
if (pcmd->UserCallback != NULL)
|
||||
{
|
||||
// User callback, registered via ImDrawList::AddCallback()
|
||||
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
|
||||
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
|
||||
ImGui_ImplWGPU_SetupRenderState(draw_data, pass_encoder, fr);
|
||||
else
|
||||
pcmd->UserCallback(cmd_list, pcmd);
|
||||
}
|
||||
else
|
||||
{
|
||||
// Bind custom texture
|
||||
auto bind_group = g_resources.ImageBindGroups.GetVoidPtr(ImHashData(&pcmd->TextureId, sizeof(ImTextureID)));
|
||||
if (bind_group) {
|
||||
wgpuRenderPassEncoderSetBindGroup(pass_encoder, 1, (WGPUBindGroup)bind_group, 0, NULL);
|
||||
}
|
||||
else {
|
||||
WGPUBindGroup image_bind_group = ImGui_ImplWGPU_CreateImageBindGroup(g_resources.ImageBindGroupLayout, (WGPUTextureView) pcmd->TextureId);
|
||||
g_resources.ImageBindGroups.SetVoidPtr(ImHashData(&pcmd->TextureId, sizeof(ImTextureID)), image_bind_group);
|
||||
|
||||
wgpuRenderPassEncoderSetBindGroup(pass_encoder, 1, image_bind_group, 0, NULL);
|
||||
}
|
||||
|
||||
// Apply Scissor, Bind texture, Draw
|
||||
uint32_t clip_rect[4];
|
||||
clip_rect[0] = static_cast<uint32_t>(pcmd->ClipRect.x - clip_off.x);
|
||||
clip_rect[1] = static_cast<uint32_t>(pcmd->ClipRect.y - clip_off.y);
|
||||
clip_rect[2] = static_cast<uint32_t>(pcmd->ClipRect.z - clip_off.x);
|
||||
clip_rect[3] = static_cast<uint32_t>(pcmd->ClipRect.w - clip_off.y);
|
||||
wgpuRenderPassEncoderSetScissorRect(pass_encoder, clip_rect[0], clip_rect[1], clip_rect[2] - clip_rect[0], clip_rect[3] - clip_rect[1]);
|
||||
wgpuRenderPassEncoderDrawIndexed(pass_encoder, pcmd->ElemCount, 1, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset, 0);
|
||||
}
|
||||
}
|
||||
global_idx_offset += cmd_list->IdxBuffer.Size;
|
||||
global_vtx_offset += cmd_list->VtxBuffer.Size;
|
||||
}
|
||||
}
|
||||
|
||||
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()
|
||||
{
|
||||
// Build texture atlas
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
unsigned char* pixels;
|
||||
int width, height, size_pp;
|
||||
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height, &size_pp);
|
||||
|
||||
// Upload texture to graphics system
|
||||
{
|
||||
WGPUTextureDescriptor tex_desc = {};
|
||||
tex_desc.label = "IMGUI Font Texture";
|
||||
tex_desc.dimension = WGPUTextureDimension_2D;
|
||||
tex_desc.size.width = width;
|
||||
tex_desc.size.height = height;
|
||||
tex_desc.size.depth = 1;
|
||||
tex_desc.sampleCount = 1;
|
||||
tex_desc.format = WGPUTextureFormat_RGBA8Unorm;
|
||||
tex_desc.mipLevelCount = 1;
|
||||
tex_desc.usage = WGPUTextureUsage_CopyDst | WGPUTextureUsage_Sampled;
|
||||
g_resources.FontTexture = wgpuDeviceCreateTexture(g_wgpuDevice, &tex_desc);
|
||||
|
||||
WGPUTextureViewDescriptor tex_view_desc = {};
|
||||
tex_view_desc.format = WGPUTextureFormat_RGBA8Unorm;
|
||||
tex_view_desc.dimension = WGPUTextureViewDimension_2D;
|
||||
tex_view_desc.baseMipLevel = 0;
|
||||
tex_view_desc.mipLevelCount = 1;
|
||||
tex_view_desc.baseArrayLayer = 0;
|
||||
tex_view_desc.arrayLayerCount = 1;
|
||||
tex_view_desc.aspect = WGPUTextureAspect_All;
|
||||
g_resources.FontTextureView = wgpuTextureCreateView(g_resources.FontTexture, &tex_view_desc);
|
||||
}
|
||||
|
||||
// Upload texture data
|
||||
{
|
||||
WGPUBuffer staging_buffer = ImGui_ImplWGPU_CreateBufferFromData(g_wgpuDevice, pixels, static_cast<uint32_t>(width * size_pp * height), WGPUBufferUsage_CopySrc);
|
||||
|
||||
WGPUBufferCopyView bufferCopyView = {};
|
||||
bufferCopyView.buffer = staging_buffer;
|
||||
bufferCopyView.layout.offset = 0;
|
||||
bufferCopyView.layout.bytesPerRow = width * size_pp;
|
||||
bufferCopyView.layout.rowsPerImage = height;
|
||||
|
||||
WGPUTextureCopyView textureCopyView = {};
|
||||
textureCopyView.texture = g_resources.FontTexture;
|
||||
textureCopyView.mipLevel = 0;
|
||||
textureCopyView.origin = { 0, 0, 0 };
|
||||
#ifndef __EMSCRIPTEN__
|
||||
textureCopyView.aspect = WGPUTextureAspect_All;
|
||||
#endif
|
||||
|
||||
WGPUExtent3D copySize = { static_cast<uint32_t>(width), static_cast<uint32_t>(height), 1 };
|
||||
|
||||
WGPUCommandEncoderDescriptor enc_desc = {};
|
||||
WGPUCommandEncoder encoder = wgpuDeviceCreateCommandEncoder(g_wgpuDevice, &enc_desc);
|
||||
wgpuCommandEncoderCopyBufferToTexture(encoder, &bufferCopyView, &textureCopyView, ©Size);
|
||||
WGPUCommandBufferDescriptor cmd_buf_desc = {};
|
||||
WGPUCommandBuffer copy = wgpuCommandEncoderFinish(encoder, &cmd_buf_desc);
|
||||
WGPUQueue queue = wgpuDeviceGetDefaultQueue(g_wgpuDevice);
|
||||
wgpuQueueSubmit(queue, 1, ©);
|
||||
|
||||
wgpuCommandEncoderRelease(encoder);
|
||||
wgpuBufferRelease(staging_buffer);
|
||||
}
|
||||
|
||||
// Create the associated sampler
|
||||
{
|
||||
WGPUSamplerDescriptor sampler_desc = {};
|
||||
sampler_desc.minFilter = WGPUFilterMode_Linear;
|
||||
sampler_desc.magFilter = WGPUFilterMode_Linear;
|
||||
sampler_desc.mipmapFilter = WGPUFilterMode_Linear;
|
||||
sampler_desc.addressModeU = WGPUAddressMode_Repeat;
|
||||
sampler_desc.addressModeV = WGPUAddressMode_Repeat;
|
||||
sampler_desc.addressModeW = WGPUAddressMode_Repeat;
|
||||
g_resources.Sampler = wgpuDeviceCreateSampler(g_wgpuDevice, &sampler_desc);
|
||||
}
|
||||
|
||||
// Store our identifier
|
||||
static_assert(sizeof(ImTextureID) >= sizeof(g_resources.FontTexture), "Can't pack descriptor handle into TexID, 32-bit not supported yet.");
|
||||
io.Fonts->TexID = (ImTextureID)g_resources.FontTextureView;
|
||||
}
|
||||
|
||||
static void ImGui_ImplWGPU_CreateUniformBuffer()
|
||||
{
|
||||
WGPUBufferDescriptor ub_desc = {
|
||||
nullptr,
|
||||
"IMGUI Uniform buffer",
|
||||
WGPUBufferUsage_CopyDst | WGPUBufferUsage_Uniform,
|
||||
sizeof(Uniforms),
|
||||
false
|
||||
};
|
||||
g_resources.Uniforms = wgpuDeviceCreateBuffer(g_wgpuDevice, &ub_desc);
|
||||
}
|
||||
|
||||
bool ImGui_ImplWGPU_CreateDeviceObjects()
|
||||
{
|
||||
if (!g_wgpuDevice)
|
||||
return false;
|
||||
if (g_pipelineState)
|
||||
ImGui_ImplWGPU_InvalidateDeviceObjects();
|
||||
|
||||
// Create render pipeline
|
||||
WGPURenderPipelineDescriptor graphics_pipeline_desc = {};
|
||||
|
||||
graphics_pipeline_desc.primitiveTopology = WGPUPrimitiveTopology_TriangleList;
|
||||
graphics_pipeline_desc.sampleCount = 1;
|
||||
graphics_pipeline_desc.sampleMask = UINT_MAX;
|
||||
|
||||
|
||||
WGPUBindGroupLayoutEntry common_bg_layout_entries[2] = {};
|
||||
common_bg_layout_entries[0].binding = 0;
|
||||
common_bg_layout_entries[0].visibility = WGPUShaderStage_Vertex;
|
||||
common_bg_layout_entries[0].type = WGPUBindingType_UniformBuffer;
|
||||
common_bg_layout_entries[1].binding = 1;
|
||||
common_bg_layout_entries[1].visibility = WGPUShaderStage_Fragment;
|
||||
common_bg_layout_entries[1].type = WGPUBindingType_Sampler;
|
||||
|
||||
WGPUBindGroupLayoutEntry image_bg_layout_entries[1] = {};
|
||||
image_bg_layout_entries[0].binding = 0;
|
||||
image_bg_layout_entries[0].visibility = WGPUShaderStage_Fragment;
|
||||
image_bg_layout_entries[0].type = WGPUBindingType_SampledTexture;
|
||||
|
||||
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
|
||||
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;
|
||||
|
||||
// Vertex input configuration
|
||||
WGPUVertexAttributeDescriptor attribute_binding_desc[] = {
|
||||
{ WGPUVertexFormat_Float2, (uint64_t)IM_OFFSETOF(ImDrawVert, pos), 0 },
|
||||
{ WGPUVertexFormat_Float2, (uint64_t)IM_OFFSETOF(ImDrawVert, uv), 1 },
|
||||
{ WGPUVertexFormat_UChar4Norm, (uint64_t)IM_OFFSETOF(ImDrawVert, col), 2 },
|
||||
};
|
||||
|
||||
WGPUVertexBufferLayoutDescriptor buffer_binding_desc;
|
||||
buffer_binding_desc.arrayStride = sizeof(ImDrawVert);
|
||||
buffer_binding_desc.stepMode = WGPUInputStepMode_Vertex;
|
||||
buffer_binding_desc.attributeCount = 3;
|
||||
buffer_binding_desc.attributes = attribute_binding_desc;
|
||||
|
||||
WGPUVertexStateDescriptor vertex_state_desc = {};
|
||||
vertex_state_desc.indexFormat = WGPUIndexFormat_Undefined;
|
||||
vertex_state_desc.vertexBufferCount = 1;
|
||||
vertex_state_desc.vertexBuffers = &buffer_binding_desc;
|
||||
|
||||
graphics_pipeline_desc.vertexState = &vertex_state_desc;
|
||||
|
||||
// Create the pixel shader
|
||||
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
|
||||
WGPUColorStateDescriptor color_state = {};
|
||||
{
|
||||
color_state.format = g_renderTargetFormat;
|
||||
color_state.alphaBlend.operation = WGPUBlendOperation_Add;
|
||||
color_state.alphaBlend.srcFactor = WGPUBlendFactor_OneMinusSrcAlpha;
|
||||
color_state.alphaBlend.dstFactor = WGPUBlendFactor_Zero;
|
||||
color_state.colorBlend.operation = WGPUBlendOperation_Add;
|
||||
color_state.colorBlend.srcFactor = WGPUBlendFactor_SrcAlpha;
|
||||
color_state.colorBlend.dstFactor = WGPUBlendFactor_OneMinusSrcAlpha;
|
||||
color_state.writeMask = WGPUColorWriteMask_All;
|
||||
|
||||
graphics_pipeline_desc.colorStateCount = 1;
|
||||
graphics_pipeline_desc.colorStates = &color_state;
|
||||
graphics_pipeline_desc.alphaToCoverageEnabled = false;
|
||||
}
|
||||
|
||||
// Create the rasterizer state
|
||||
WGPURasterizationStateDescriptor raster_desc = {};
|
||||
{
|
||||
raster_desc.cullMode = WGPUCullMode_None;
|
||||
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
|
||||
WGPUDepthStencilStateDescriptor depth_desc = {};
|
||||
{
|
||||
// Configure disabled state
|
||||
depth_desc.format = WGPUTextureFormat_Undefined;
|
||||
|
||||
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 = nullptr;
|
||||
}
|
||||
|
||||
g_pipelineState = wgpuDeviceCreateRenderPipeline(g_wgpuDevice, &graphics_pipeline_desc);
|
||||
|
||||
ImGui_ImplWGPU_CreateFontsTexture();
|
||||
ImGui_ImplWGPU_CreateUniformBuffer();
|
||||
|
||||
// Create resource bind group
|
||||
WGPUBindGroupEntry common_bg_entries[] = {
|
||||
{ 0, g_resources.Uniforms, 0, sizeof(Uniforms), 0, 0 },
|
||||
{ 1, 0, 0, 0, g_resources.Sampler, 0 },
|
||||
};
|
||||
|
||||
WGPUBindGroupDescriptor common_bg_descriptor = {};
|
||||
common_bg_descriptor.layout = bg_layouts[0];
|
||||
common_bg_descriptor.entryCount = sizeof(common_bg_entries) / sizeof(WGPUBindGroupEntry);
|
||||
common_bg_descriptor.entries = common_bg_entries;
|
||||
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);
|
||||
g_resources.ImageBindGroup = image_bind_group;
|
||||
g_resources.ImageBindGroups.SetVoidPtr(ImHashData(&g_resources.FontTextureView, sizeof(ImTextureID)), image_bind_group);
|
||||
|
||||
SafeRelease(vertex_shader_desc.module);
|
||||
SafeRelease(pixel_shader_desc.module);
|
||||
SafeRelease(bg_layouts[0]);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void ImGui_ImplWGPU_InvalidateDeviceObjects()
|
||||
{
|
||||
if (!g_wgpuDevice)
|
||||
return;
|
||||
|
||||
SafeRelease(g_pipelineState);
|
||||
SafeRelease(g_resources);
|
||||
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
io.Fonts->TexID = NULL; // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
|
||||
|
||||
for (unsigned int i = 0; i < g_numFramesInFlight; i++)
|
||||
{
|
||||
SafeRelease(g_pFrameResources[i]);
|
||||
}
|
||||
}
|
||||
|
||||
bool ImGui_ImplWGPU_Init(WGPUDevice device, int num_frames_in_flight, WGPUTextureFormat rt_format)
|
||||
{
|
||||
// Setup back-end capabilities flags
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
io.BackendRendererName = "imgui_impl_webgpu";
|
||||
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
|
||||
|
||||
g_wgpuDevice = device;
|
||||
g_renderTargetFormat = rt_format;
|
||||
g_pFrameResources = new FrameResources[num_frames_in_flight];
|
||||
g_numFramesInFlight = num_frames_in_flight;
|
||||
g_frameIndex = UINT_MAX;
|
||||
|
||||
g_resources.FontTexture = NULL;
|
||||
g_resources.FontTextureView = NULL;
|
||||
g_resources.Sampler = NULL;
|
||||
g_resources.Uniforms = NULL;
|
||||
g_resources.CommonBindGroup = NULL;
|
||||
g_resources.ImageBindGroupLayout = NULL;
|
||||
g_resources.ImageBindGroups.Data.reserve(100);
|
||||
g_resources.ImageBindGroup = NULL;
|
||||
|
||||
// Create buffers with a default size (they will later be grown as needed)
|
||||
for (int i = 0; i < num_frames_in_flight; i++)
|
||||
{
|
||||
FrameResources* fr = &g_pFrameResources[i];
|
||||
fr->IndexBuffer = NULL;
|
||||
fr->VertexBuffer = NULL;
|
||||
fr->IndexBufferHost = NULL;
|
||||
fr->VertexBufferHost = NULL;
|
||||
fr->IndexBufferSize = 10000;
|
||||
fr->VertexBufferSize = 5000;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void ImGui_ImplWGPU_Shutdown()
|
||||
{
|
||||
ImGui_ImplWGPU_InvalidateDeviceObjects();
|
||||
delete[] g_pFrameResources;
|
||||
g_pFrameResources = NULL;
|
||||
g_wgpuDevice = NULL;
|
||||
g_numFramesInFlight = 0;
|
||||
g_frameIndex = UINT_MAX;
|
||||
}
|
||||
|
||||
void ImGui_ImplWGPU_NewFrame()
|
||||
{
|
||||
if (!g_pipelineState)
|
||||
ImGui_ImplWGPU_CreateDeviceObjects();
|
||||
}
|
||||
@ -0,0 +1,26 @@
|
||||
// dear imgui: Renderer for WebGPU
|
||||
// This needs to be used along with a Platform Binding (e.g. GLFW)
|
||||
|
||||
// Implemented features:
|
||||
// [X] Renderer: User texture binding. Use 'WGPUTextureView' as ImTextureID. Read the FAQ about ImTextureID!
|
||||
// [X] Renderer: Support for large meshes (64k+ vertices) with 16-bit indices.
|
||||
|
||||
// You can copy and use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
|
||||
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
|
||||
// Read online: https://github.com/ocornut/imgui/tree/master/docs
|
||||
|
||||
#pragma once
|
||||
#include "imgui.h" // IMGUI_IMPL_API
|
||||
|
||||
// WebGPU
|
||||
#include <webgpu/webgpu.h>
|
||||
|
||||
// cmd_list is the command list that the implementation will use to render imgui draw lists.
|
||||
IMGUI_IMPL_API bool ImGui_ImplWGPU_Init(WGPUDevice device, int num_frames_in_flight, WGPUTextureFormat rt_format);
|
||||
IMGUI_IMPL_API void ImGui_ImplWGPU_Shutdown();
|
||||
IMGUI_IMPL_API void ImGui_ImplWGPU_NewFrame();
|
||||
IMGUI_IMPL_API void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder pass_encoder);
|
||||
|
||||
// Use if you want to reset your rendering device without losing Dear ImGui state.
|
||||
IMGUI_IMPL_API void ImGui_ImplWGPU_InvalidateDeviceObjects();
|
||||
IMGUI_IMPL_API bool ImGui_ImplWGPU_CreateDeviceObjects();
|
||||
@ -0,0 +1,80 @@
|
||||
#
|
||||
# Makefile to use with emscripten
|
||||
# See https://emscripten.org/docs/getting_started/downloads.html
|
||||
# for installation instructions.
|
||||
#
|
||||
# This Makefile assumes you have loaded emscripten's environment.
|
||||
# (On Windows, you may need to execute emsdk_env.bat or encmdprompt.bat ahead)
|
||||
#
|
||||
# Running `make` will produce two files:
|
||||
# - example_emscripten_wgpu.js
|
||||
# - example_emscripten_wgpu.wasm
|
||||
#
|
||||
# All three are needed to run the demo.
|
||||
|
||||
CC = emcc
|
||||
CXX = em++
|
||||
EXE = example_emscripten_wgpu.js
|
||||
IMGUI_DIR = ../..
|
||||
SOURCES = main.cpp
|
||||
SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_widgets.cpp
|
||||
SOURCES += $(IMGUI_DIR)/backends/imgui_impl_glfw.cpp $(IMGUI_DIR)/backends/imgui_impl_wgpu.cpp
|
||||
OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
|
||||
UNAME_S := $(shell uname -s)
|
||||
|
||||
##---------------------------------------------------------------------
|
||||
## EMSCRIPTEN OPTIONS
|
||||
##---------------------------------------------------------------------
|
||||
|
||||
EMS += -s USE_GLFW=3 -s USE_WEBGPU=1 -s WASM=1
|
||||
EMS += -s ALLOW_MEMORY_GROWTH=1
|
||||
EMS += -s DISABLE_EXCEPTION_CATCHING=1 -s NO_EXIT_RUNTIME=0
|
||||
EMS += -s ASSERTIONS=1
|
||||
|
||||
# Emscripten allows preloading a file or folder to be accessible at runtime.
|
||||
# The Makefile for this example project suggests embedding the misc/fonts/ folder into our application, it will then be accessible as "/fonts"
|
||||
# See documentation for more details: https://emscripten.org/docs/porting/files/packaging_files.html
|
||||
# (Default value is 0. Set to 1 to enable file-system and include the misc/fonts/ folder as part of the build.)
|
||||
USE_FILE_SYSTEM ?= 0
|
||||
ifeq ($(USE_FILE_SYSTEM), 0)
|
||||
EMS += -s NO_FILESYSTEM=1 -DIMGUI_DISABLE_FILE_FUNCTIONS
|
||||
endif
|
||||
ifeq ($(USE_FILE_SYSTEM), 1)
|
||||
LDFLAGS += --no-heap-copy --preload-file ../../misc/fonts@/fonts
|
||||
endif
|
||||
|
||||
##---------------------------------------------------------------------
|
||||
## FINAL BUILD FLAGS
|
||||
##---------------------------------------------------------------------
|
||||
|
||||
CPPFLAGS += -I$(IMGUI_DIR)/ -I$(IMGUI_DIR)/backends
|
||||
#CPPFLAGS += -g
|
||||
CPPFLAGS += -Wall -Wformat -Os
|
||||
CPPFLAGS += $(EMS)
|
||||
LIBS += $(EMS)
|
||||
#LDFLAGS += --shell-file shell_minimal.html
|
||||
|
||||
##---------------------------------------------------------------------
|
||||
## BUILD RULES
|
||||
##---------------------------------------------------------------------
|
||||
|
||||
%.o:%.cpp
|
||||
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
|
||||
|
||||
%.o:../%.cpp
|
||||
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
|
||||
|
||||
%.o:$(IMGUI_DIR)/%.cpp
|
||||
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
|
||||
|
||||
%.o:$(IMGUI_DIR)/backends/%.cpp
|
||||
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
|
||||
|
||||
all: $(EXE)
|
||||
@echo Build complete for $(EXE)
|
||||
|
||||
$(EXE): $(OBJS)
|
||||
$(CXX) -o $@ $^ $(LIBS) $(LDFLAGS)
|
||||
|
||||
clean:
|
||||
rm -f $(EXE) $(OBJS) *.js *.wasm *.wasm.pre
|
||||
@ -0,0 +1,10 @@
|
||||
|
||||
# How to Build
|
||||
|
||||
- You need to install Emscripten from https://emscripten.org/docs/getting_started/downloads.html, and have the environment variables set, as described in https://emscripten.org/docs/getting_started/downloads.html#installation-instructions
|
||||
|
||||
- Depending on your configuration, in Windows you may need to run `emsdk/emsdk_env.bat` in your console to access the Emscripten command-line tools.
|
||||
|
||||
- Then build using `make` while in the `example_emscripten_wgpu/` directory.
|
||||
|
||||
- Requires Emscripten 2.0.10 (December 2020) due to GLFW adaptations
|
||||
@ -0,0 +1,80 @@
|
||||
<!doctype html>
|
||||
<html lang="en-us">
|
||||
<head>
|
||||
<meta charset="utf-8">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"/>
|
||||
<title>Dear ImGui Emscripten example</title>
|
||||
<style>
|
||||
body { margin: 0; background-color: black }
|
||||
.emscripten {
|
||||
position: absolute;
|
||||
top: 0px;
|
||||
left: 0px;
|
||||
margin: 0px;
|
||||
border: 0;
|
||||
width: 100%;
|
||||
height: 100%;
|
||||
overflow: hidden;
|
||||
display: block;
|
||||
image-rendering: optimizeSpeed;
|
||||
image-rendering: -moz-crisp-edges;
|
||||
image-rendering: -o-crisp-edges;
|
||||
image-rendering: -webkit-optimize-contrast;
|
||||
image-rendering: optimize-contrast;
|
||||
image-rendering: crisp-edges;
|
||||
image-rendering: pixelated;
|
||||
-ms-interpolation-mode: nearest-neighbor;
|
||||
}
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()"></canvas>
|
||||
<script type='text/javascript'>
|
||||
var Module;
|
||||
(async () => {
|
||||
Module = {
|
||||
preRun: [],
|
||||
postRun: [],
|
||||
print: (function() {
|
||||
return function(text) {
|
||||
text = Array.prototype.slice.call(arguments).join(' ');
|
||||
console.log(text);
|
||||
};
|
||||
})(),
|
||||
printErr: function(text) {
|
||||
text = Array.prototype.slice.call(arguments).join(' ');
|
||||
console.error(text);
|
||||
},
|
||||
canvas: (function() {
|
||||
var canvas = document.getElementById('canvas');
|
||||
//canvas.addEventListener("webglcontextlost", function(e) { alert('FIXME: WebGL context lost, please reload the page'); e.preventDefault(); }, false);
|
||||
return canvas;
|
||||
})(),
|
||||
setStatus: function(text) {
|
||||
console.log("status: " + text);
|
||||
},
|
||||
monitorRunDependencies: function(left) {
|
||||
// no run dependencies to log
|
||||
}
|
||||
};
|
||||
window.onerror = function() {
|
||||
console.log("onerror: " + event);
|
||||
};
|
||||
|
||||
// Initialize the graphics adapter
|
||||
{
|
||||
const adapter = await navigator.gpu.requestAdapter();
|
||||
const device = await adapter.requestDevice();
|
||||
Module.preinitializedWebGPUDevice = device;
|
||||
}
|
||||
|
||||
{
|
||||
const js = document.createElement('script');
|
||||
js.async = true;
|
||||
js.src = "example_emscripten_wgpu.js";
|
||||
document.body.appendChild(js);
|
||||
}
|
||||
})();
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
@ -0,0 +1,257 @@
|
||||
// Dear ImGui: standalone example application for Emscripten, using GLFW + WebGPU
|
||||
// (Emscripten is a C++-to-javascript compiler, used to publish executables for the web. See https://emscripten.org/)
|
||||
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
|
||||
// Read online: https://github.com/ocornut/imgui/tree/master/docs
|
||||
|
||||
// This is mostly the same code as the SDL2 + OpenGL3 example, simply with the modifications needed to run on Emscripten.
|
||||
// It is possible to combine both code into a single source file that will compile properly on Desktop and using Emscripten.
|
||||
// See https://github.com/ocornut/imgui/pull/2492 as an example on how to do just that.
|
||||
|
||||
#include "imgui.h"
|
||||
#include "imgui_impl_glfw.h"
|
||||
#include "imgui_impl_wgpu.h"
|
||||
#include <stdio.h>
|
||||
#include <emscripten.h>
|
||||
#include <emscripten/html5.h>
|
||||
#include <emscripten/html5_webgpu.h>
|
||||
#include <GLFW/glfw3.h>
|
||||
#include <webgpu/webgpu.h>
|
||||
#include <webgpu/webgpu_cpp.h>
|
||||
|
||||
// Global WebGPU required states
|
||||
static WGPUDevice wgpu_device = NULL;
|
||||
static WGPUSurface wgpu_surface = NULL;
|
||||
static WGPUSwapChain wgpu_swap_chain = NULL;
|
||||
|
||||
static int wgpu_swap_chain_width = 0;
|
||||
static int wgpu_swap_chain_height = 0;
|
||||
|
||||
// States tracked across render frames
|
||||
static bool show_demo_window = true;
|
||||
static bool show_another_window = false;
|
||||
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
|
||||
|
||||
// Forward declartions
|
||||
bool init_wgpu();
|
||||
void main_loop(void* window);
|
||||
void print_glfw_error(int error, const char* description);
|
||||
void print_wgpu_error(WGPUErrorType error_type, const char* message, void*);
|
||||
|
||||
int main(int, char**)
|
||||
{
|
||||
glfwSetErrorCallback(print_glfw_error);
|
||||
if (!glfwInit())
|
||||
return 1;
|
||||
|
||||
// Make sure GLFW does not initialize any graphics context.
|
||||
// This needs to be done explicitly later
|
||||
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
|
||||
|
||||
GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+WebGPU example", NULL, NULL);
|
||||
if (!window) {
|
||||
glfwTerminate();
|
||||
return 1;
|
||||
}
|
||||
|
||||
// Initialize the WebGPU environment
|
||||
if (!init_wgpu()) {
|
||||
if (window)
|
||||
glfwDestroyWindow(window);
|
||||
glfwTerminate();
|
||||
return 1;
|
||||
}
|
||||
glfwShowWindow(window);
|
||||
|
||||
// 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
|
||||
|
||||
// For an Emscripten build we are disabling file-system access, so let's not attempt to do a fopen() of the imgui.ini file.
|
||||
// You may manually call LoadIniSettingsFromMemory() to load settings from your own storage.
|
||||
io.IniFilename = NULL;
|
||||
|
||||
// Setup Dear ImGui style
|
||||
ImGui::StyleColorsDark();
|
||||
//ImGui::StyleColorsClassic();
|
||||
|
||||
// Setup Platform/Renderer backends
|
||||
ImGui_ImplGlfw_InitForVulkan(window, true);
|
||||
ImGui_ImplWGPU_Init(wgpu_device, 3, WGPUTextureFormat_RGBA8Unorm);
|
||||
|
||||
// Load Fonts
|
||||
// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
|
||||
// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
|
||||
// - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
|
||||
// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
|
||||
// - Read 'docs/FONTS.md' for more instructions and details.
|
||||
// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
|
||||
// - Emscripten allows preloading a file or folder to be accessible at runtime. See Makefile for details.
|
||||
//io.Fonts->AddFontDefault();
|
||||
#ifndef IMGUI_DISABLE_FILE_FUNCTIONS
|
||||
io.Fonts->AddFontFromFileTTF("fonts/Roboto-Medium.ttf", 16.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("fonts/Cousine-Regular.ttf", 15.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("fonts/DroidSans.ttf", 16.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("fonts/ProggyTiny.ttf", 10.0f);
|
||||
//ImFont* font = io.Fonts->AddFontFromFileTTF("fonts/ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
|
||||
//IM_ASSERT(font != NULL);
|
||||
#endif
|
||||
|
||||
// This function will directly return and extit he main function.
|
||||
// Make sure that no required objects get cleaned up.
|
||||
// This way we can use the browsers 'requestAnimationFrame' to control the rendering.
|
||||
emscripten_set_main_loop_arg(main_loop, window, 0, false);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
bool init_wgpu()
|
||||
{
|
||||
wgpu_device = emscripten_webgpu_get_device();
|
||||
if (!wgpu_device)
|
||||
return false;
|
||||
|
||||
wgpuDeviceSetUncapturedErrorCallback(wgpu_device, print_wgpu_error, nullptr);
|
||||
|
||||
// Use C++ wrapper due to malbehaviour in Emscripten.
|
||||
// Some offset computation for wgpuInstanceCreateSurface in JavaScript
|
||||
// seem to be inline with struct alignments in the C++ structure
|
||||
wgpu::SurfaceDescriptorFromCanvasHTMLSelector html_surface_desc{};
|
||||
html_surface_desc.selector = "#canvas";
|
||||
|
||||
wgpu::SurfaceDescriptor surface_desc{};
|
||||
surface_desc.nextInChain = &html_surface_desc;
|
||||
|
||||
// Use 'null' instance
|
||||
wgpu::Instance instance{};
|
||||
wgpu_surface = instance.CreateSurface(&surface_desc).Release();
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void main_loop(void* window)
|
||||
{
|
||||
glfwPollEvents();
|
||||
|
||||
int width, height;
|
||||
glfwGetFramebufferSize((GLFWwindow*) window, &width, &height);
|
||||
|
||||
// React to changes in screen size
|
||||
if (width != wgpu_swap_chain_width && height != wgpu_swap_chain_height)
|
||||
{
|
||||
ImGui_ImplWGPU_InvalidateDeviceObjects();
|
||||
|
||||
if (wgpu_swap_chain)
|
||||
wgpuSwapChainRelease(wgpu_swap_chain);
|
||||
|
||||
wgpu_swap_chain_width = width;
|
||||
wgpu_swap_chain_height = height;
|
||||
|
||||
WGPUSwapChainDescriptor swap_chain_desc = {};
|
||||
swap_chain_desc.usage = WGPUTextureUsage_OutputAttachment;
|
||||
swap_chain_desc.format = WGPUTextureFormat_RGBA8Unorm;
|
||||
swap_chain_desc.width = width;
|
||||
swap_chain_desc.height = height;
|
||||
swap_chain_desc.presentMode = WGPUPresentMode_Fifo;
|
||||
wgpu_swap_chain = wgpuDeviceCreateSwapChain(wgpu_device, wgpu_surface, &swap_chain_desc);
|
||||
|
||||
ImGui_ImplWGPU_CreateDeviceObjects();
|
||||
}
|
||||
|
||||
// Start the Dear ImGui frame
|
||||
ImGui_ImplWGPU_NewFrame();
|
||||
ImGui_ImplGlfw_NewFrame();
|
||||
ImGui::NewFrame();
|
||||
|
||||
// 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
|
||||
if (show_demo_window)
|
||||
ImGui::ShowDemoWindow(&show_demo_window);
|
||||
|
||||
// 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window.
|
||||
{
|
||||
static float f = 0.0f;
|
||||
static int counter = 0;
|
||||
|
||||
ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.
|
||||
|
||||
ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
|
||||
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
|
||||
ImGui::Checkbox("Another Window", &show_another_window);
|
||||
|
||||
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
|
||||
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
|
||||
|
||||
if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
|
||||
counter++;
|
||||
ImGui::SameLine();
|
||||
ImGui::Text("counter = %d", counter);
|
||||
|
||||
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
|
||||
ImGui::End();
|
||||
}
|
||||
|
||||
// 3. Show another simple window.
|
||||
if (show_another_window)
|
||||
{
|
||||
ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
|
||||
ImGui::Text("Hello from another window!");
|
||||
if (ImGui::Button("Close Me"))
|
||||
show_another_window = false;
|
||||
ImGui::End();
|
||||
}
|
||||
|
||||
// Render the generated ImGui frame
|
||||
ImGui::Render();
|
||||
|
||||
WGPURenderPassColorAttachmentDescriptor color_attachments = {};
|
||||
color_attachments.loadOp = WGPULoadOp_Clear;
|
||||
color_attachments.storeOp = WGPUStoreOp_Store;
|
||||
color_attachments.clearColor = { clear_color.x, clear_color.y, clear_color.z, clear_color.w };
|
||||
color_attachments.attachment = wgpuSwapChainGetCurrentTextureView(wgpu_swap_chain);
|
||||
WGPURenderPassDescriptor render_pass_desc = {};
|
||||
render_pass_desc.colorAttachmentCount = 1;
|
||||
render_pass_desc.colorAttachments = &color_attachments;
|
||||
render_pass_desc.depthStencilAttachment = nullptr;
|
||||
|
||||
WGPUCommandEncoderDescriptor enc_desc = {};
|
||||
WGPUCommandEncoder encoder = wgpuDeviceCreateCommandEncoder(wgpu_device, &enc_desc);
|
||||
|
||||
WGPURenderPassEncoder pass = wgpuCommandEncoderBeginRenderPass(encoder, &render_pass_desc);
|
||||
ImGui_ImplWGPU_RenderDrawData(ImGui::GetDrawData(), pass);
|
||||
wgpuRenderPassEncoderEndPass(pass);
|
||||
|
||||
WGPUCommandBufferDescriptor cmd_buffer_desc = {};
|
||||
WGPUCommandBuffer cmd_buffer = wgpuCommandEncoderFinish(encoder, &cmd_buffer_desc);
|
||||
WGPUQueue queue = wgpuDeviceGetDefaultQueue(wgpu_device);
|
||||
wgpuQueueSubmit(queue, 1, &cmd_buffer);
|
||||
}
|
||||
|
||||
void print_glfw_error(int error, const char* description)
|
||||
{
|
||||
printf("Glfw Error %d: %s\n", error, description);
|
||||
}
|
||||
|
||||
void print_wgpu_error(WGPUErrorType error_type, const char* message, void*)
|
||||
{
|
||||
const char* error_type_lbl = "";
|
||||
switch (error_type) {
|
||||
case WGPUErrorType_Validation:
|
||||
error_type_lbl = "Validation";
|
||||
break;
|
||||
case WGPUErrorType_OutOfMemory:
|
||||
error_type_lbl = "Out of memory";
|
||||
break;
|
||||
case WGPUErrorType_Unknown:
|
||||
error_type_lbl = "Unknown";
|
||||
break;
|
||||
case WGPUErrorType_DeviceLost:
|
||||
error_type_lbl = "Device lost";
|
||||
break;
|
||||
default:
|
||||
error_type_lbl = "Unknown";
|
||||
}
|
||||
|
||||
printf("%s error: %s\n", error_type_lbl, message);
|
||||
}
|
||||
Loading…
Reference in New Issue