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CoreExporter image transformation uses WGSL shader on WebGPU #7623

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Merged
merged 1 commit into from
Apr 28, 2025
Merged

CoreExporter image transformation uses WGSL shader on WebGPU #7623

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32 changes: 14 additions & 18 deletions src/extras/exporters/core-exporter.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,27 +3,17 @@ import { Texture } from '../../platform/graphics/texture.js';
import { BlendState } from '../../platform/graphics/blend-state.js';
import { drawQuadWithShader } from '../../scene/graphics/quad-render-utils.js';
import { RenderTarget } from '../../platform/graphics/render-target.js';
import { FILTER_LINEAR, ADDRESS_CLAMP_TO_EDGE, isCompressedPixelFormat, PIXELFORMAT_RGBA8 } from '../../platform/graphics/constants.js';
import {
FILTER_LINEAR, ADDRESS_CLAMP_TO_EDGE, isCompressedPixelFormat, PIXELFORMAT_RGBA8,
SEMANTIC_POSITION, SHADERLANGUAGE_WGSL, SHADERLANGUAGE_GLSL
} from '../../platform/graphics/constants.js';
import { shaderChunks } from '../../scene/shader-lib/chunks/chunks.js';
import { shaderChunksWGSL } from '../../scene/shader-lib/chunks-wgsl/chunks-wgsl.js';

/**
* @import { Color } from '../../core/math/color.js'
*/

const textureBlitVertexShader = /* glsl */`
attribute vec2 vertex_position;
varying vec2 uv0;
void main(void) {
gl_Position = vec4(vertex_position, 0.5, 1.0);
uv0 = vertex_position.xy * 0.5 + 0.5;
}`;

const textureBlitFragmentShader = /* glsl */`
varying vec2 uv0;
uniform sampler2D blitTexture;
void main(void) {
gl_FragColor = texture2D(blitTexture, uv0);
}`;

/**
* The base class for the exporters, implementing shared functionality.
*
Expand Down Expand Up @@ -113,8 +103,14 @@ class CoreExporter {
});

// render to a render target using a blit shader
const shader = createShaderFromCode(device, textureBlitVertexShader, textureBlitFragmentShader, 'ShaderCoreExporterBlit');
device.scope.resolve('blitTexture').setValue(texture);
const shader = device.isWebGPU ?
createShaderFromCode(device, shaderChunksWGSL.fullscreenQuadVS, shaderChunksWGSL.outputTex2DPS, 'ShaderCoreExporterBlit',
{ vertex_position: SEMANTIC_POSITION }, { shaderLanguage: SHADERLANGUAGE_WGSL }
) :
createShaderFromCode(device, shaderChunks.fullscreenQuadVS, shaderChunks.outputTex2DPS, 'ShaderCoreExporterBlit',
{ vertex_position: SEMANTIC_POSITION }, { shaderLanguage: SHADERLANGUAGE_GLSL }
);
device.scope.resolve('source').setValue(texture);
device.setBlendState(BlendState.NOBLEND);
drawQuadWithShader(device, renderTarget, shader);

Expand Down