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Only upload textures that change

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This commit is contained in:
Daniel Imms
2022-10-29 13:27:33 -07:00
parent 0a49a5dde1
commit c257a7247e
4 changed files with 21 additions and 19 deletions
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addons/xterm-addon-webgl/src/GlyphRenderer.ts
+8 -8
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@@ -335,14 +335,14 @@ export class GlyphRenderer extends Disposable {
gl.bindBuffer(gl.ARRAY_BUFFER, this._attributesBuffer);
gl.bufferData(gl.ARRAY_BUFFER, activeBuffer.subarray(0, bufferLength), gl.STREAM_DRAW);
// Bind the texture atlas if it's changed
if (this._atlas.hasCanvasChanged) {
this._atlas.hasCanvasChanged = false;
// TODO: Make nicer
const layerTextureUnits = new Int32Array([0, 1, 2, 3, 4, 5, 6, 7]);
gl.uniform1iv(this._textureLocation, layerTextureUnits);
// TODO: Only upload the texture(s) that changed
for (let i = 0; i < this._atlas.pages.length; i++) {
// TODO: Only do this once
const layerTextureUnits = new Int32Array([0, 1, 2, 3, 4, 5, 6, 7]);
gl.uniform1iv(this._textureLocation, layerTextureUnits);
// Bind the atlas page texture if they have changed
for (let i = 0; i < this._atlas.pages.length; i++) {
if (this._atlas.pages[i].hasCanvasChanged) {
this._atlas.pages[i].hasCanvasChanged = false;
gl.activeTexture(gl.TEXTURE0 + i);
gl.bindTexture(gl.TEXTURE_2D, this._atlasTextures[i]);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, this._atlas.pages[i].canvas);