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

perf: only do expensive reload when texture changes

Browse Source
This commit is contained in:
John Leonard
2020-02-14 11:39:54 +00:00
parent bb68da2a0a
commit 8fe71bbbff
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/ol/webgl/Helper.js
View File

@@ -558,6 +558,7 @@ class WebGLHelper extends Disposable {
if (value instanceof HTMLCanvasElement || value instanceof HTMLImageElement || value instanceof ImageData) {
// create a texture & put data
if (!uniform.texture) {
uniform.prevValue = undefined;
uniform.texture = gl.createTexture();
}
gl.activeTexture(gl[`TEXTURE${textureSlot}`]);
@@ -567,7 +568,8 @@ class WebGLHelper extends Disposable {
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
const imageReady = !(value instanceof HTMLImageElement) || /** @type {HTMLImageElement} */(value).complete;
if (imageReady) {
if (imageReady && uniform.prevValue !== value) {
uniform.prevValue = value;
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, value);
}