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author | Ilion Beyst <ilion.beyst@gmail.com> | 2021-12-22 13:59:13 +0100 |
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committer | Ilion Beyst <ilion.beyst@gmail.com> | 2021-12-22 13:59:13 +0100 |
commit | 96ee00242f350b391dcc1cf4d72a442c969f565e (patch) | |
tree | a9c57feb105200556c76559b3c775d159c98aef9 /web/pw-frontend/src/lib/visualizer/webgl/texture.ts | |
parent | 218ebc3b8f5024a0813f8378b83d91dbb9aa7db2 (diff) | |
download | planetwars.dev-96ee00242f350b391dcc1cf4d72a442c969f565e.tar.xz planetwars.dev-96ee00242f350b391dcc1cf4d72a442c969f565e.zip |
add pw-frontend
Diffstat (limited to 'web/pw-frontend/src/lib/visualizer/webgl/texture.ts')
-rw-r--r-- | web/pw-frontend/src/lib/visualizer/webgl/texture.ts | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/web/pw-frontend/src/lib/visualizer/webgl/texture.ts b/web/pw-frontend/src/lib/visualizer/webgl/texture.ts new file mode 100644 index 0000000..9d6adcf --- /dev/null +++ b/web/pw-frontend/src/lib/visualizer/webgl/texture.ts @@ -0,0 +1,106 @@ +import type { Renderer } from "./renderer"; + +export class Texture { + texture: WebGLTexture; + width: number; + height: number; + loaded: boolean; + name: string; + + static fromImage( + gl: WebGLRenderingContext, + path: string, + name: string, + ): Texture { + const out = new Texture(gl, name); + + const image = new Image(); + image.onload = out.setImage.bind(out, gl, image); + image.onerror = error; + image.src = path; + + return out; + } + + static fromRenderer( + gl: WebGLRenderingContext, + name: string, + width: number, + height: number, + renderer: Renderer + ): Texture { + const out = new Texture(gl, name); + out.width = width; + out.height = height; + + gl.texImage2D( + gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, + gl.RGBA, gl.UNSIGNED_BYTE, null); + + const fb = gl.createFramebuffer(); + gl.bindFramebuffer(gl.FRAMEBUFFER, fb); + + const attachmentPoint = gl.COLOR_ATTACHMENT0; + gl.framebufferTexture2D(gl.FRAMEBUFFER, attachmentPoint, gl.TEXTURE_2D, out.texture, 0); + + renderer.render(gl, fb, width, height); + + out.loaded = true; + + return out; + } + + constructor( + gl: WebGLRenderingContext, + name: string, + ) { + this.loaded = false; + this.name = name; + + this.texture = gl.createTexture(); + this.bind(gl); + + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); + + gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, + gl.UNSIGNED_BYTE, new Uint8Array([255, 0, 0, 255])); + } + + setImage(gl: WebGLRenderingContext, image: HTMLImageElement) { + this.bind(gl); + this.width = image.width; + this.height = image.height; + + gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); + + this.unbind(gl); + + this.loaded = true; + } + + bind(gl: WebGLRenderingContext, location=0) { + gl.activeTexture(gl.TEXTURE0 + location); + gl.bindTexture(gl.TEXTURE_2D, this.texture); + } + + unbind(gl: WebGLRenderingContext) { + gl.bindTexture(gl.TEXTURE_2D, null); + } + + + getWidth(): number { + return this.width; + } + + getHeight(): number { + return this.height; + } +} + +function error(e: any) { + console.error("IMAGE LOAD ERROR"); + console.error(e); +} |