ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Webgl points / fix weird glitches by premultiplying alpha

Browse Source
This commit is contained in:
Olivier Guyot
2018-12-07 00:35:42 +01:00
parent f177a2bcd5
commit b532a489d4
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/ol/webgl/PostProcessingPass.js
+2 -1
View File
@@ -28,6 +28,7 @@ const DEFAULT_FRAGMENT_SHADER = `
void main() { void main() {
gl_FragColor = texture2D(u_image, v_texCoord); 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.clearColor(0.0, 0.0, 0.0, 0.0);
gl.clear(gl.COLOR_BUFFER_BIT); gl.clear(gl.COLOR_BUFFER_BIT);
gl.enable(gl.BLEND); 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.viewport(0, 0, canvas.width, canvas.height);
gl.bindBuffer(gl.ARRAY_BUFFER, this.renderTargetVerticesBuffer_); gl.bindBuffer(gl.ARRAY_BUFFER, this.renderTargetVerticesBuffer_);