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Apply transform matrix to text coords

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With this commit the transform matrix is applied to each texture coordinate, as opposed to each fragment. This leads to less calculation on the GPU.
This commit is contained in:
Éric Lemoine
2013-02-13 21:50:32 +01:00
parent 83a00c13fa
commit de7a1d8f81
3 changed files with 20 additions and 19 deletions
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16
src/ol/renderer/webgl/webgltilelayerrenderer.js
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@@ -139,7 +139,7 @@ ol.renderer.webgl.TileLayer = function(mapRenderer, tileLayer) {
* @private
* @type {!goog.vec.Mat4.Number}
*/
this.matrix_ = goog.vec.Mat4.createNumber();
this.texCoordMatrix_ = goog.vec.Mat4.createNumber();
/**
* @private
@@ -224,8 +224,8 @@ ol.renderer.webgl.TileLayer.prototype.disposeInternal = function() {
/**
* @inheritDoc
*/
ol.renderer.webgl.TileLayer.prototype.getMatrix = function() {
return this.matrix_;
ol.renderer.webgl.TileLayer.prototype.getTexCoordMatrix = function() {
return this.texCoordMatrix_;
};
@@ -467,21 +467,21 @@ ol.renderer.webgl.TileLayer.prototype.renderFrame =
this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);
this.scheduleExpireCache(frameState, tileSource);
goog.vec.Mat4.makeIdentity(this.matrix_);
goog.vec.Mat4.translate(this.matrix_,
goog.vec.Mat4.makeIdentity(this.texCoordMatrix_);
goog.vec.Mat4.translate(this.texCoordMatrix_,
(view2DState.center.x - framebufferExtent.minX) /
(framebufferExtent.maxX - framebufferExtent.minX),
(view2DState.center.y - framebufferExtent.minY) /
(framebufferExtent.maxY - framebufferExtent.minY),
0);
goog.vec.Mat4.rotateZ(this.matrix_, view2DState.rotation);
goog.vec.Mat4.scale(this.matrix_,
goog.vec.Mat4.rotateZ(this.texCoordMatrix_, view2DState.rotation);
goog.vec.Mat4.scale(this.texCoordMatrix_,
frameState.size.width * view2DState.resolution /
(framebufferExtent.maxX - framebufferExtent.minX),
frameState.size.height * view2DState.resolution /
(framebufferExtent.maxY - framebufferExtent.minY),
1);
goog.vec.Mat4.translate(this.matrix_,
goog.vec.Mat4.translate(this.texCoordMatrix_,
-0.5,
-0.5,
0);