107 lines
2.6 KiB
TypeScript
107 lines
2.6 KiB
TypeScript
import { Renderer } from "./renderer";
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export class Texture {
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texture: WebGLTexture;
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width: number;
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height: number;
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loaded: boolean;
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name: string;
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static fromImage(
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gl: WebGLRenderingContext,
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path: string,
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name: string,
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): Texture {
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const out = new Texture(gl, name);
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const image = new Image();
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image.onload = out.setImage.bind(out, gl, image);
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image.onerror = error;
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image.src = path;
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return out;
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}
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static fromRenderer(
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gl: WebGLRenderingContext,
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name: string,
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width: number,
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height: number,
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renderer: Renderer
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): Texture {
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const out = new Texture(gl, name);
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out.width = width;
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out.height = height;
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gl.texImage2D(
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gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0,
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gl.RGBA, gl.UNSIGNED_BYTE, null);
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const fb = gl.createFramebuffer();
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gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
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const attachmentPoint = gl.COLOR_ATTACHMENT0;
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gl.framebufferTexture2D(gl.FRAMEBUFFER, attachmentPoint, gl.TEXTURE_2D, out.texture, 0);
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renderer.render(gl, fb, width, height);
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out.loaded = true;
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return out;
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}
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constructor(
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gl: WebGLRenderingContext,
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name: string,
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) {
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this.loaded = false;
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this.name = name;
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this.texture = gl.createTexture();
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this.bind(gl);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
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gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA,
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gl.UNSIGNED_BYTE, new Uint8Array([255, 0, 0, 255]));
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}
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setImage(gl: WebGLRenderingContext, image: HTMLImageElement) {
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this.bind(gl);
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this.width = image.width;
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this.height = image.height;
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gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
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this.unbind(gl);
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this.loaded = true;
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}
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bind(gl: WebGLRenderingContext, location=0) {
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gl.activeTexture(gl.TEXTURE0 + location);
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gl.bindTexture(gl.TEXTURE_2D, this.texture);
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}
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unbind(gl: WebGLRenderingContext) {
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gl.bindTexture(gl.TEXTURE_2D, null);
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}
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getWidth(): number {
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return this.width;
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}
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getHeight(): number {
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return this.height;
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}
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}
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function error(e: any) {
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console.error("IMAGE LOAD ERROR");
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console.error(e);
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}
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