初始化

vendor/h264-live-player/Program.ts

@@ -0,0 +1,49 @@
+import Shader from './Shader';
+import assert from './utils/assert';
+
+export default class Program {
+    public readonly program: WebGLProgram | null;
+
+    constructor(readonly gl: WebGLRenderingContext) {
+        this.program = this.gl.createProgram();
+    }
+
+    public attach(shader: Shader): void {
+        if (!this.program) {
+            throw Error(`Program type is ${typeof this.program}`);
+        }
+        if (!shader.shader) {
+            throw Error(`Shader type is ${typeof shader.shader}`);
+        }
+        this.gl.attachShader(this.program, shader.shader);
+    }
+
+    public link(): void {
+        if (!this.program) {
+            throw Error(`Program type is ${typeof this.program}`);
+        }
+        this.gl.linkProgram(this.program);
+        // If creating the shader program failed, alert.
+        assert(this.gl.getProgramParameter(this.program, this.gl.LINK_STATUS),
+            'Unable to initialize the shader program.');
+    }
+
+    public use(): void {
+        this.gl.useProgram(this.program);
+    }
+
+    public getAttributeLocation(name: string): number {
+        if (!this.program) {
+            throw Error(`Program type is ${typeof this.program}`);
+        }
+        return this.gl.getAttribLocation(this.program, name);
+    }
+
+    public setMatrixUniform(name: string, array: Float32List): void {
+        if (!this.program) {
+            throw Error(`Program type is ${typeof this.program}`);
+        }
+        const uniform = this.gl.getUniformLocation(this.program, name);
+        this.gl.uniformMatrix4fv(uniform, false, array);
+    }
+}