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[webgpu] Add Surface API #21939

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merged 14 commits into from
May 23, 2024
Merged

[webgpu] Add Surface API #21939

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433fd95
Add Surface API
beaufortfrancois May 14, 2024
767b08d
Address first pass of feedback
beaufortfrancois May 16, 2024
58bd82f
Merge branch 'main' of github.com:emscripten-core/emscripten into sur…
beaufortfrancois May 16, 2024
a0d767e
Run gen_struct_info.py
beaufortfrancois May 17, 2024
84cf370
Merge branch 'main' of github.com:emscripten-core/emscripten into sur…
beaufortfrancois May 17, 2024
ad186ce
Apply suggestions from code review
kainino0x May 17, 2024
222ef5a
Apply more suggestions from code review
kainino0x May 17, 2024
c03ef6a
Apply more suggestions
kainino0x May 17, 2024
5c6c62d
Merge branch 'main' into surface
kainino0x May 17, 2024
d9dbf13
rerun gen_sig_info
kainino0x May 18, 2024
084f0a0
Merge branch 'main' of github.com:emscripten-core/emscripten into sur…
beaufortfrancois May 21, 2024
6f82930
Address latest feedback
beaufortfrancois May 22, 2024
c68cffd
Merge branch 'main' of github.com:emscripten-core/emscripten into sur…
beaufortfrancois May 22, 2024
8390ae3
also allow CompositeAlphaMode::Auto
kainino0x May 23, 2024
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29 changes: 29 additions & 0 deletions src/generated_struct_info32.json
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Original file line number Diff line number Diff line change
Expand Up @@ -1260,6 +1260,29 @@
"limits": 8,
"nextInChain": 0
},
"WGPUSurfaceCapabilities": {
"__size__": 28,
"alphaModeCount": 20,
"alphaModes": 24,
"formatCount": 4,
"formats": 8,
"nextInChain": 0,
"presentModeCount": 12,
"presentModes": 16
},
"WGPUSurfaceConfiguration": {
"__size__": 40,
"alphaMode": 24,
"device": 4,
"format": 8,
"height": 32,
"nextInChain": 0,
"presentMode": 36,
"usage": 12,
"viewFormatCount": 16,
"viewFormats": 20,
"width": 28
},
"WGPUSurfaceDescriptor": {
"__size__": 8,
"label": 4,
Expand All @@ -1270,6 +1293,12 @@
"chain": 0,
"selector": 8
},
"WGPUSurfaceTexture": {
"__size__": 12,
"status": 8,
"suboptimal": 4,
"texture": 0
},
"WGPUSwapChainDescriptor": {
"__size__": 28,
"format": 12,
Expand Down
29 changes: 29 additions & 0 deletions src/generated_struct_info64.json
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Original file line number Diff line number Diff line change
Expand Up @@ -1260,6 +1260,29 @@
"limits": 8,
"nextInChain": 0
},
"WGPUSurfaceCapabilities": {
"__size__": 56,
"alphaModeCount": 40,
"alphaModes": 48,
"formatCount": 8,
"formats": 16,
"nextInChain": 0,
"presentModeCount": 24,
"presentModes": 32
},
"WGPUSurfaceConfiguration": {
"__size__": 56,
"alphaMode": 40,
"device": 8,
"format": 16,
"height": 48,
"nextInChain": 0,
"presentMode": 52,
"usage": 20,
"viewFormatCount": 24,
"viewFormats": 32,
"width": 44
},
"WGPUSurfaceDescriptor": {
"__size__": 16,
"label": 8,
Expand All @@ -1270,6 +1293,12 @@
"chain": 0,
"selector": 16
},
"WGPUSurfaceTexture": {
"__size__": 16,
"status": 12,
"suboptimal": 8,
"texture": 0
},
"WGPUSwapChainDescriptor": {
"__size__": 40,
"format": 20,
Expand Down
5 changes: 5 additions & 0 deletions src/library_sigs.js
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Expand Up @@ -1711,9 +1711,14 @@ sigs = {
wgpuShaderModuleReference__sig: 'vp',
wgpuShaderModuleRelease__sig: 'vp',
wgpuShaderModuleSetLabel__sig: 'vpp',
wgpuSurfaceCapabilitiesFreeMembers__sig: 'vp',
wgpuSurfaceConfigure__sig: 'vpp',
wgpuSurfaceGetCurrentTexture__sig: 'vpp',
wgpuSurfaceGetPreferredFormat__sig: 'ipp',
wgpuSurfacePresent__sig: 'vp',
wgpuSurfaceReference__sig: 'vp',
wgpuSurfaceRelease__sig: 'vp',
wgpuSurfaceUnconfigure__sig: 'vp',
wgpuSwapChainGetCurrentTexture__sig: 'pp',
wgpuSwapChainGetCurrentTextureView__sig: 'pp',
wgpuSwapChainPresent__sig: 'vp',
Expand Down
71 changes: 71 additions & 0 deletions src/library_webgpu.js
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Expand Up @@ -2673,13 +2673,84 @@ var LibraryWebGPU = {
sampler.label = UTF8ToString(labelPtr);
},

// WGPUSurfaceCapabilities

wgpuSurfaceCapabilitiesFreeMembers: (value) => {
// wgpuSurfaceCapabilities does currently allocate anything
},

// WGPUSurface

wgpuSurfaceConfigure: (surfaceId, config) => {
{{{ gpu.makeCheckDescriptor('config') }}}
var deviceId = {{{ makeGetValue('config', C_STRUCTS.WGPUSurfaceConfiguration.device, '*') }}};
var context = WebGPU.mgrSurface.get(surfaceId);

#if ASSERTIONS
assert({{{ gpu.PresentMode.Fifo }}} ===
{{{ gpu.makeGetU32('config', C_STRUCTS.WGPUSurfaceConfiguration.presentMode) }}});
#endif

var canvasSize = [
{{{ gpu.makeGetU32('config', C_STRUCTS.WGPUSurfaceConfiguration.width) }}},
{{{ gpu.makeGetU32('config', C_STRUCTS.WGPUSurfaceConfiguration.height) }}}
];

if (canvasSize[0] !== 0) {
context["canvas"]["width"] = canvasSize[0];
}

if (canvasSize[1] !== 0) {
context["canvas"]["height"] = canvasSize[1];
}

var configuration = {
"device": WebGPU.mgrDevice.get(deviceId),
"format": WebGPU.TextureFormat[
{{{ gpu.makeGetU32('config', C_STRUCTS.WGPUSurfaceConfiguration.format) }}}],
"usage": {{{ gpu.makeGetU32('config', C_STRUCTS.WGPUSurfaceConfiguration.usage) }}},
// viewFormatCount
// viewFormats
"alphaMode": "opaque",
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This should be either "opaque" or "premultiplied" depending on the configuration, and there should be an assert that it's one of the values that's valid in JS (auto, opaque, premultiplied). (Just look it up in the table above and then assert that the result is not undefined.)

Alternatively, assert the alphaMode is Opaque for now with a TODO, and implement this later if you'd like.

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I've assert alphaMode is Opaque with a TODO.

"width": canvasSize[0],
"height": canvasSize[1],
"presentMode": {{{ gpu.makeGetU32('config', C_STRUCTS.WGPUSurfaceConfiguration.presentMode) }}},
};
context.configure(configuration);
},

wgpuSurfaceGetCurrentTexture: (surfaceId, surfaceTexturePtr) => {
{{{ gpu.makeCheck('surfaceTexturePtr') }}}
var context = WebGPU.mgrSurface.get(surfaceId);

try {
var texture = WebGPU.mgrTexture.create(context.getCurrentTexture());
{{{ makeSetValue('surfaceTexturePtr', C_STRUCTS.WGPUSurfaceTexture.texture, 'texture', '*') }}};
{{{ makeSetValue('surfaceTexturePtr', C_STRUCTS.WGPUSurfaceTexture.suboptimal, '0', 'i32') }}};
{{{ makeSetValue('surfaceTexturePtr', C_STRUCTS.WGPUSurfaceTexture.status, /*Success=*/0, 'i32') }}};
} catch (ex) {
#if ASSERTIONS
err(`wgpuSurfaceGetCurrentTexture() failed: ${ex}`);
#endif
{{{ makeSetValue('surfaceTexturePtr', C_STRUCTS.WGPUSurfaceTexture.status, /*Timeout=*/1, 'i32') }}};
}
},

wgpuSurfaceGetPreferredFormat: (surfaceId, adapterId) => {
var format = navigator["gpu"]["getPreferredCanvasFormat"]();
return WebGPU.Int_PreferredFormat[format];
},

wgpuSurfacePresent: (surfaceId) => {
// TODO: This could probably be emulated with ASYNCIFY.
abort('wgpuSurfacePresent is unsupported (use requestAnimationFrame via html5.h instead)');
},

wgpuSurfaceUnconfigure: (surfaceId) => {
var context = WebGPU.mgrSurface.get(surfaceId);
context.unconfigure();
},

// WGPUSwapChain

wgpuDeviceCreateSwapChain: (deviceId, surfaceId, descriptor) => {
Expand Down
26 changes: 26 additions & 0 deletions src/struct_info.json
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Expand Up @@ -1480,6 +1480,27 @@
"format",
"viewDimension"
],
"WGPUSurfaceCapabilities": [
"nextInChain",
"formatCount",
"formats",
"presentModeCount",
"presentModes",
"alphaModeCount",
"alphaModes"
],
"WGPUSurfaceConfiguration": [
"nextInChain",
"device",
"format",
"usage",
"viewFormatCount",
"viewFormats",
"alphaMode",
"width",
"height",
"presentMode"
],
"WGPUSurfaceDescriptor": [
"nextInChain",
"label"
Expand All @@ -1488,6 +1509,11 @@
"chain",
"selector"
],
"WGPUSurfaceTexture": [
"texture",
"suboptimal",
"status"
],
"WGPUSwapChainDescriptor": [
"nextInChain",
"label",
Expand Down
8 changes: 4 additions & 4 deletions system/include/webgpu/README.md
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Expand Up @@ -2,7 +2,7 @@ These files, and several snippets of other files, are generated by Dawn
(Chromium's WebGPU library):
- [Generator](https://source.chromium.org/chromium/chromium/src/+/main:third_party/dawn/generator/)
- [Generator input](https://source.chromium.org/chromium/chromium/src/+/main:third_party/dawn/dawn.json)
- [Generator output](https://source.chromium.org/chromium/chromium/src/+/main:out/Debug/gen/third_party/dawn/emscripten-bits/)
- [Generator output](https://source.chromium.org/chromium/chromium/src/+/main:out/linux-Debug/gen/third_party/dawn/emscripten-bits/)

The C header is intended to be mostly the same as the "upstream"
[`webgpu.h`](https://github.com/webgpu-native/webgpu-headers/blob/main/webgpu.h),
Expand All @@ -16,13 +16,13 @@ is included here because it is strongly tied to an exact `webgpu.h` revision.
To update these bindings from Dawn:
1. Copy [`webgpu_enum_class_bitmasks.h`](https://source.chromium.org/chromium/chromium/src/+/main:third_party/dawn/include/webgpu/webgpu_enum_class_bitmasks.h) from Dawn's source to `system/include/webgpu/webgpu_enum_class_bitmasks.h`
1. Build Dawn's `emscripten_bits_gen` target (in a gn or CMake build of Dawn, or a build of Chromium) - or, use the Chromium Code Search copy of the generated files if no changes are needed
1. Copy the generated [`emscripten-bits/system`](https://source.chromium.org/chromium/chromium/src/+/main:out/Debug/gen/third_party/dawn/emscripten-bits/system/) files into Emscripten's `system` directory
1. Copy the generated [`emscripten-bits/system`](https://source.chromium.org/chromium/chromium/src/+/main:out/linux-Debug/gen/third_party/dawn/emscripten-bits/system/) files into Emscripten's `system` directory
- `system/include/webgpu/webgpu.h`
- `system/include/webgpu/webgpu_cpp.h`
- `system/include/webgpu/webgpu_cpp_chained_struct.h`
- `system/lib/webgpu/webgpu_cpp.cpp`
1. Paste the contents of [`library_webgpu_enum_tables.js`](https://source.chromium.org/chromium/chromium/src/+/main:out/Debug/gen/third_party/dawn/emscripten-bits/library_webgpu_enum_tables.js) over the "Map from enum number to enum string" section of [`library_webgpu.js`](../../../src/library_webgpu.js)
1. Paste [`webgpu_struct_info.json`](https://source.chromium.org/chromium/chromium/src/+/main:out/Debug/gen/third_party/dawn/emscripten-bits/webgpu_struct_info.json) over the "WebGPU" section of [`struct_info.json`](../../../src/struct_info.json).
1. Paste the contents of [`library_webgpu_enum_tables.js`](https://source.chromium.org/chromium/chromium/src/+/main:out/linux-Debug/gen/third_party/dawn/emscripten-bits/library_webgpu_enum_tables.js) over the "Map from enum number to enum string" section of [`library_webgpu.js`](../../../src/library_webgpu.js)
1. Paste [`webgpu_struct_info.json`](https://source.chromium.org/chromium/chromium/src/+/main:out/linux-Debug/gen/third_party/dawn/emscripten-bits/webgpu_struct_info.json) over the "WebGPU" section of [`struct_info.json`](../../../src/struct_info.json).
1. **Manually update the `globalThis.gpu` compile-time enum tables (AdapterType, BackendType, etc.)**:
- Inspect the `webgpu.h` diff for changes to the integer values of any enums used here. (It's not necessary to add new enum values to these tables until they're needed for something.)
1. **Manually update the "Map from enum string back to enum number" tables.**
Expand Down
63 changes: 63 additions & 0 deletions system/include/webgpu/webgpu.h
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Expand Up @@ -143,8 +143,11 @@ struct WGPUShaderModuleWGSLDescriptor;
struct WGPUShaderModuleDescriptor;
struct WGPUStencilFaceState;
struct WGPUStorageTextureBindingLayout;
struct WGPUSurfaceCapabilities;
struct WGPUSurfaceConfiguration;
struct WGPUSurfaceDescriptor;
struct WGPUSurfaceDescriptorFromCanvasHTMLSelector;
struct WGPUSurfaceTexture;
struct WGPUSwapChainDescriptor;
struct WGPUTextureBindingLayout;
struct WGPUTextureBindingViewDimensionDescriptor;
Expand Down Expand Up @@ -305,6 +308,15 @@ typedef enum WGPUCompilationMessageType {
WGPUCompilationMessageType_Force32 = 0x7FFFFFFF
} WGPUCompilationMessageType WGPU_ENUM_ATTRIBUTE;

typedef enum WGPUCompositeAlphaMode {
WGPUCompositeAlphaMode_Auto = 0x00000000,
WGPUCompositeAlphaMode_Opaque = 0x00000001,
WGPUCompositeAlphaMode_Premultiplied = 0x00000002,
WGPUCompositeAlphaMode_Unpremultiplied = 0x00000003,
WGPUCompositeAlphaMode_Inherit = 0x00000004,
WGPUCompositeAlphaMode_Force32 = 0x7FFFFFFF
} WGPUCompositeAlphaMode WGPU_ENUM_ATTRIBUTE;

typedef enum WGPUCreatePipelineAsyncStatus {
WGPUCreatePipelineAsyncStatus_Success = 0x00000000,
WGPUCreatePipelineAsyncStatus_ValidationError = 0x00000001,
Expand Down Expand Up @@ -497,6 +509,16 @@ typedef enum WGPUStoreOp {
WGPUStoreOp_Force32 = 0x7FFFFFFF
} WGPUStoreOp WGPU_ENUM_ATTRIBUTE;

typedef enum WGPUSurfaceGetCurrentTextureStatus {
WGPUSurfaceGetCurrentTextureStatus_Success = 0x00000000,
WGPUSurfaceGetCurrentTextureStatus_Timeout = 0x00000001,
WGPUSurfaceGetCurrentTextureStatus_Outdated = 0x00000002,
WGPUSurfaceGetCurrentTextureStatus_Lost = 0x00000003,
WGPUSurfaceGetCurrentTextureStatus_OutOfMemory = 0x00000004,
WGPUSurfaceGetCurrentTextureStatus_DeviceLost = 0x00000005,
WGPUSurfaceGetCurrentTextureStatus_Force32 = 0x7FFFFFFF
} WGPUSurfaceGetCurrentTextureStatus WGPU_ENUM_ATTRIBUTE;

typedef enum WGPUTextureAspect {
WGPUTextureAspect_Undefined = 0x00000000,
WGPUTextureAspect_All = 0x00000001,
Expand Down Expand Up @@ -1069,6 +1091,29 @@ typedef struct WGPUStorageTextureBindingLayout {
WGPUTextureViewDimension viewDimension;
} WGPUStorageTextureBindingLayout WGPU_STRUCTURE_ATTRIBUTE;

typedef struct WGPUSurfaceCapabilities {
WGPUChainedStructOut * nextInChain;
size_t formatCount;
WGPUTextureFormat const * formats;
size_t presentModeCount;
WGPUPresentMode const * presentModes;
size_t alphaModeCount;
WGPUCompositeAlphaMode const * alphaModes;
} WGPUSurfaceCapabilities WGPU_STRUCTURE_ATTRIBUTE;

typedef struct WGPUSurfaceConfiguration {
WGPUChainedStruct const * nextInChain;
WGPUDevice device;
WGPUTextureFormat format;
WGPUTextureUsageFlags usage;
size_t viewFormatCount;
WGPUTextureFormat const * viewFormats;
WGPUCompositeAlphaMode alphaMode;
uint32_t width;
uint32_t height;
WGPUPresentMode presentMode;
} WGPUSurfaceConfiguration WGPU_STRUCTURE_ATTRIBUTE;

typedef struct WGPUSurfaceDescriptor {
WGPUChainedStruct const * nextInChain;
WGPU_NULLABLE char const * label;
Expand All @@ -1080,6 +1125,12 @@ typedef struct WGPUSurfaceDescriptorFromCanvasHTMLSelector {
char const * selector;
} WGPUSurfaceDescriptorFromCanvasHTMLSelector WGPU_STRUCTURE_ATTRIBUTE;

typedef struct WGPUSurfaceTexture {
WGPUTexture texture;
WGPUBool suboptimal;
WGPUSurfaceGetCurrentTextureStatus status;
} WGPUSurfaceTexture WGPU_STRUCTURE_ATTRIBUTE;

typedef struct WGPUSwapChainDescriptor {
WGPUChainedStruct const * nextInChain;
WGPU_NULLABLE char const * label;
Expand Down Expand Up @@ -1332,6 +1383,7 @@ typedef void (*WGPUProcAdapterPropertiesFreeMembers)(WGPUAdapterProperties value
typedef WGPUInstance (*WGPUProcCreateInstance)(WGPUInstanceDescriptor const * descriptor) WGPU_FUNCTION_ATTRIBUTE;
typedef WGPUBool (*WGPUProcGetInstanceFeatures)(WGPUInstanceFeatures * features) WGPU_FUNCTION_ATTRIBUTE;
typedef WGPUProc (*WGPUProcGetProcAddress)(WGPUDevice device, char const * procName) WGPU_FUNCTION_ATTRIBUTE;
typedef void (*WGPUProcSurfaceCapabilitiesFreeMembers)(WGPUSurfaceCapabilities value) WGPU_FUNCTION_ATTRIBUTE;

// Procs of Adapter
typedef size_t (*WGPUProcAdapterEnumerateFeatures)(WGPUAdapter adapter, WGPUFeatureName * features) WGPU_FUNCTION_ATTRIBUTE;
Expand Down Expand Up @@ -1532,7 +1584,12 @@ typedef void (*WGPUProcShaderModuleReference)(WGPUShaderModule shaderModule) WGP
typedef void (*WGPUProcShaderModuleRelease)(WGPUShaderModule shaderModule) WGPU_FUNCTION_ATTRIBUTE;

// Procs of Surface
typedef void (*WGPUProcSurfaceConfigure)(WGPUSurface surface, WGPUSurfaceConfiguration const * config) WGPU_FUNCTION_ATTRIBUTE;
typedef void (*WGPUProcSurfaceGetCapabilities)(WGPUSurface surface, WGPUAdapter adapter, WGPUSurfaceCapabilities * capabilities) WGPU_FUNCTION_ATTRIBUTE;
typedef void (*WGPUProcSurfaceGetCurrentTexture)(WGPUSurface surface, WGPUSurfaceTexture * surfaceTexture) WGPU_FUNCTION_ATTRIBUTE;
typedef WGPUTextureFormat (*WGPUProcSurfaceGetPreferredFormat)(WGPUSurface surface, WGPUAdapter adapter) WGPU_FUNCTION_ATTRIBUTE;
typedef void (*WGPUProcSurfacePresent)(WGPUSurface surface) WGPU_FUNCTION_ATTRIBUTE;
typedef void (*WGPUProcSurfaceUnconfigure)(WGPUSurface surface) WGPU_FUNCTION_ATTRIBUTE;
typedef void (*WGPUProcSurfaceReference)(WGPUSurface surface) WGPU_FUNCTION_ATTRIBUTE;
typedef void (*WGPUProcSurfaceRelease)(WGPUSurface surface) WGPU_FUNCTION_ATTRIBUTE;

Expand Down Expand Up @@ -1572,6 +1629,7 @@ WGPU_EXPORT void wgpuAdapterPropertiesFreeMembers(WGPUAdapterProperties value) W
WGPU_EXPORT WGPUInstance wgpuCreateInstance(WGPU_NULLABLE WGPUInstanceDescriptor const * descriptor) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT WGPUBool wgpuGetInstanceFeatures(WGPUInstanceFeatures * features) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT WGPUProc wgpuGetProcAddress(WGPU_NULLABLE WGPUDevice device, char const * procName) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT void wgpuSurfaceCapabilitiesFreeMembers(WGPUSurfaceCapabilities value) WGPU_FUNCTION_ATTRIBUTE;

// Methods of Adapter
WGPU_EXPORT size_t wgpuAdapterEnumerateFeatures(WGPUAdapter adapter, WGPUFeatureName * features) WGPU_FUNCTION_ATTRIBUTE;
Expand Down Expand Up @@ -1771,7 +1829,12 @@ WGPU_EXPORT void wgpuShaderModuleReference(WGPUShaderModule shaderModule) WGPU_F
WGPU_EXPORT void wgpuShaderModuleRelease(WGPUShaderModule shaderModule) WGPU_FUNCTION_ATTRIBUTE;

// Methods of Surface
WGPU_EXPORT void wgpuSurfaceConfigure(WGPUSurface surface, WGPUSurfaceConfiguration const * config) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT void wgpuSurfaceGetCapabilities(WGPUSurface surface, WGPUAdapter adapter, WGPUSurfaceCapabilities * capabilities) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT void wgpuSurfaceGetCurrentTexture(WGPUSurface surface, WGPUSurfaceTexture * surfaceTexture) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT WGPUTextureFormat wgpuSurfaceGetPreferredFormat(WGPUSurface surface, WGPUAdapter adapter) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT void wgpuSurfacePresent(WGPUSurface surface) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT void wgpuSurfaceUnconfigure(WGPUSurface surface) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT void wgpuSurfaceReference(WGPUSurface surface) WGPU_FUNCTION_ATTRIBUTE;
WGPU_EXPORT void wgpuSurfaceRelease(WGPUSurface surface) WGPU_FUNCTION_ATTRIBUTE;

Expand Down
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