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author | Matthias Schiffer <mschiffer@universe-factory.net> | 2018-10-24 23:05:13 +0200 |
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committer | Matthias Schiffer <mschiffer@universe-factory.net> | 2018-10-24 23:05:13 +0200 |
commit | ebc56db63c054702ad910987aa666d7cfb52d5cc (patch) | |
tree | 1fc08dcb6b84edd9102770d20bfe351fa02cc3f9 /src/view/renderer/Renderer.ts | |
parent | 9770eaf432bacff9de1b9911adef1db368b8cc70 (diff) | |
download | rpgedit-ebc56db63c054702ad910987aa666d7cfb52d5cc.tar rpgedit-ebc56db63c054702ad910987aa666d7cfb52d5cc.zip |
Move shader initialization out of renderer
Avoid public fields and ! overrides, make almost all fields readonly.
Diffstat (limited to 'src/view/renderer/Renderer.ts')
-rw-r--r-- | src/view/renderer/Renderer.ts | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/view/renderer/Renderer.ts b/src/view/renderer/Renderer.ts new file mode 100644 index 0000000..6e3897d --- /dev/null +++ b/src/view/renderer/Renderer.ts @@ -0,0 +1,100 @@ +import {mat4} from 'gl-matrix'; + +import Shaders from './Shaders'; + +export default class Renderer { + private readonly gl: WebGLRenderingContext; + private readonly shaders: Shaders; + private readonly viewport: mat4 = mat4.create(); + + constructor(private readonly canvas: HTMLCanvasElement) { + this.gl = this.mkContext(); + + this.shaders = new Shaders(this.gl); + + this.gl.clearColor(0.0, 0.0, 0.0, 1.0); + + this.setSize(); + } + + public createBuffer(): WebGLBuffer { + const ret = this.gl.createBuffer(); + if (!ret) + throw new Error('unable to create buffer'); + + return ret; + } + + public getContext(): WebGLRenderingContext { + return this.gl; + } + + public getVertexPosLoc(): number { + return this.shaders.vertexPosLoc; + } + + public getTextureCoordLoc(): number { + return this.shaders.textureCoordLoc; + } + + public getSamplerLoc(): WebGLUniformLocation { + return this.shaders.samplerLoc; + } + + private mkContext(): WebGLRenderingContext { + const gl = ( + this.canvas.getContext('webgl') || this.canvas.getContext('experimental-webgl') + ); + if (!gl) + throw new Error('unable to initialize WebGL context'); + + return gl; + } + + private setSize(): void { + const w = this.canvas.width; + const h = this.canvas.height; + + this.gl.viewport(0, 0, w, h); + this.gl.clear(this.gl.COLOR_BUFFER_BIT | this.gl.DEPTH_BUFFER_BIT); + + mat4.identity(this.viewport); + mat4.scale(this.viewport, this.viewport, [2 * 64 / w, -2 * 64 / h, 1.0]); + this.gl.uniformMatrix4fv(this.shaders.viewportLoc, false, this.viewport); + + this.gl.uniform2f(this.shaders.translateLoc, -5.0, -5.0); + } + + private getAttribLocation(program: WebGLProgram, name: string): number { + const ret = this.gl.getAttribLocation(program, name); + if (ret < 0) + throw new Error("unable to get location of attribute '" + name + "'"); + + return ret; + } + + private getUniformLocation(program: WebGLProgram, name: string): WebGLUniformLocation { + const ret = this.gl.getUniformLocation(program, name); + if (!ret) + throw new Error("unable to get location of uniform '" + name + "'"); + + return ret; + } + + private compileShader(type: number, src: string): WebGLShader { + const shader = this.gl.createShader(type); + if (!shader) + throw new Error('Unable to create shader'); + + this.gl.shaderSource(shader, src); + this.gl.compileShader(shader); + + if (!this.gl.getShaderParameter(shader, this.gl.COMPILE_STATUS)) { + const err = this.gl.getShaderInfoLog(shader); + this.gl.deleteShader(shader); + throw new Error('Unable to compile shader: ' + err); + } + + return shader; + } +} |