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Webgl points / fix weird glitches by premultiplying alpha

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Olivier Guyot
2018-12-07 00:35:42 +01:00
parent f177a2bcd5
commit b532a489d4
1 changed files with 2 additions and 1 deletions
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3
src/ol/webgl/PostProcessingPass.js
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@@ -28,6 +28,7 @@ const DEFAULT_FRAGMENT_SHADER = `
void main() {
gl_FragColor = texture2D(u_image, v_texCoord);
gl_FragColor.rgb *= gl_FragColor.a;
}
`;
@@ -220,7 +221,7 @@ class WebGLPostProcessingPass {
gl.clearColor(0.0, 0.0, 0.0, 0.0);
gl.clear(gl.COLOR_BUFFER_BIT);
gl.enable(gl.BLEND);
gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
gl.viewport(0, 0, canvas.width, canvas.height);
gl.bindBuffer(gl.ARRAY_BUFFER, this.renderTargetVerticesBuffer_);