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authorMatthias Schiffer <mschiffer@universe-factory.net>2019-12-24 13:53:16 +0100
committerMatthias Schiffer <mschiffer@universe-factory.net>2019-12-24 13:53:16 +0100
commit3c51a1994f41b625823c4f15e92396b5498ce23c (patch)
tree7a96310ec32df82ac87039ea555300bcab510a5e /src/renderer/runtime/view/renderer/renderer.ts
parent33926af829848050c54c698ed22da9fe2b912aea (diff)
downloadrpgedit-3c51a1994f41b625823c4f15e92396b5498ce23c.tar
rpgedit-3c51a1994f41b625823c4f15e92396b5498ce23c.zip
Move renderer into "runtime" subdirectory
Diffstat (limited to 'src/renderer/runtime/view/renderer/renderer.ts')
-rw-r--r--src/renderer/runtime/view/renderer/renderer.ts100
1 files changed, 100 insertions, 0 deletions
diff --git a/src/renderer/runtime/view/renderer/renderer.ts b/src/renderer/runtime/view/renderer/renderer.ts
new file mode 100644
index 0000000..9f711d3
--- /dev/null
+++ b/src/renderer/runtime/view/renderer/renderer.ts
@@ -0,0 +1,100 @@
+import { nextPowerOf2 } from '../../util';
+import { Shaders } from './shaders';
+
+import { mat4, vec2 } from 'gl-matrix';
+
+export class Renderer {
+ public readonly coordScale = 32;
+ private readonly viewScale = 2;
+
+ private readonly gl: WebGLRenderingContext;
+ private readonly shaders: Shaders;
+
+ private readonly center: vec2 = vec2.create();
+ private readonly translation: vec2 = vec2.create();
+ 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.gl.enable(this.gl.BLEND);
+ this.gl.blendFunc(this.gl.ONE, this.gl.ONE_MINUS_SRC_ALPHA);
+ this.gl.pixelStorei(this.gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
+ }
+
+ 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;
+ }
+
+ public setCenter(v: vec2|number[]) {
+ this.snapToGrid(this.center, v);
+ }
+
+ public setTranslation(v: vec2|number[]) {
+ vec2.sub(this.translation, v, this.center);
+ this.snapToGrid(this.translation, this.translation);
+ this.gl.uniform2fv(this.shaders.translateLoc, this.translation);
+ }
+
+ public clear(): void {
+ this.gl.clear(this.gl.COLOR_BUFFER_BIT);
+
+ this.setTranslation([0, 0]);
+ }
+
+ public snapToGrid(out: vec2, a: vec2|number[]): void {
+ vec2.scale(out, a, this.coordScale);
+ vec2.round(out, out);
+ vec2.scale(out, out, 1 / this.coordScale);
+ }
+
+ public resize(): void {
+ const w = this.canvas.width;
+ const h = this.canvas.height;
+ const ws = nextPowerOf2(w);
+ const hs = nextPowerOf2(h);
+
+ this.gl.viewport((w - ws) / 2, (h - hs) / 2, ws, hs);
+ this.clear();
+
+ const scale = this.viewScale * this.coordScale;
+
+ mat4.identity(this.viewport);
+ mat4.scale(this.viewport, this.viewport, [2 * scale / ws, -2 * scale / hs, 1.0]);
+ this.gl.uniformMatrix4fv(this.shaders.viewportLoc, false, this.viewport);
+ }
+
+ 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;
+ }
+}