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| author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
|---|---|---|
| committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
| commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
| tree | 10027f336435511475e392454359edea8e25895d /devtools/client/shadereditor/test/doc_simple-canvas.html | |
| parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
| download | UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip | |
Add m-esr52 at 52.6.0
Diffstat (limited to 'devtools/client/shadereditor/test/doc_simple-canvas.html')
| -rw-r--r-- | devtools/client/shadereditor/test/doc_simple-canvas.html | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/devtools/client/shadereditor/test/doc_simple-canvas.html b/devtools/client/shadereditor/test/doc_simple-canvas.html new file mode 100644 index 000000000..2a709ad8e --- /dev/null +++ b/devtools/client/shadereditor/test/doc_simple-canvas.html @@ -0,0 +1,125 @@ +<!-- Any copyright is dedicated to the Public Domain. + http://creativecommons.org/publicdomain/zero/1.0/ --> +<!doctype html> + +<html> + <head> + <meta charset="utf-8"/> + <title>WebGL editor test page</title> + + <script id="shader-vs" type="x-shader/x-vertex"> + precision lowp float; + attribute vec3 aVertexPosition; + attribute vec3 aVertexColor; + varying vec3 vFragmentColor; + + void main(void) { + gl_Position = vec4(aVertexPosition, 1.0); + vFragmentColor = aVertexColor; // I'm special! + } + </script> + + <script id="shader-fs" type="x-shader/x-fragment"> + precision lowp float; + varying vec3 vFragmentColor; + + void main(void) { + gl_FragColor = vec4(vFragmentColor, 1.0); // I'm also special! + } + </script> + </head> + + <body> + <canvas width="512" height="512"></canvas> + + <script type="text/javascript;version=1.8"> + "use strict"; + + let canvas, gl; + let program; + let squareVerticesPositionBuffer; + let squareVerticesColorBuffer; + let vertexPositionAttribute; + let vertexColorAttribute; + + window.onload = function() { + canvas = document.querySelector("canvas"); + gl = canvas.getContext("webgl", { preserveDrawingBuffer: true }); + gl.clearColor(0.0, 0.0, 0.0, 1.0); + + initProgram(); + initBuffers(); + drawScene(); + } + + function initProgram() { + let vertexShader = getShader(gl, "shader-vs"); + let fragmentShader = getShader(gl, "shader-fs"); + + program = gl.createProgram(); + gl.attachShader(program, vertexShader); + gl.attachShader(program, fragmentShader); + gl.linkProgram(program); + + vertexPositionAttribute = gl.getAttribLocation(program, "aVertexPosition"); + gl.enableVertexAttribArray(vertexPositionAttribute); + + vertexColorAttribute = gl.getAttribLocation(program, "aVertexColor"); + gl.enableVertexAttribArray(vertexColorAttribute); + } + + function getShader(gl, id) { + let script = document.getElementById(id); + let source = script.textContent; + let shader; + + if (script.type == "x-shader/x-fragment") { + shader = gl.createShader(gl.FRAGMENT_SHADER); + } else if (script.type == "x-shader/x-vertex") { + shader = gl.createShader(gl.VERTEX_SHADER); + } + + gl.shaderSource(shader, source); + gl.compileShader(shader); + + return shader; + } + + function initBuffers() { + squareVerticesPositionBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, squareVerticesPositionBuffer); + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ + 1.0, 1.0, 0.0, + -1.0, 1.0, 0.0, + 1.0, -1.0, 0.0, + -1.0, -1.0, 0.0 + ]), gl.STATIC_DRAW); + + squareVerticesColorBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, squareVerticesColorBuffer); + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ + 1.0, 1.0, 1.0, 1.0, + 1.0, 0.0, 0.0, 1.0, + 0.0, 1.0, 0.0, 1.0, + 0.0, 0.0, 1.0, 1.0 + ]), gl.STATIC_DRAW); + } + + function drawScene() { + gl.clear(gl.COLOR_BUFFER_BIT); + + gl.bindBuffer(gl.ARRAY_BUFFER, squareVerticesPositionBuffer); + gl.vertexAttribPointer(vertexPositionAttribute, 3, gl.FLOAT, false, 0, 0); + + gl.bindBuffer(gl.ARRAY_BUFFER, squareVerticesColorBuffer); + gl.vertexAttribPointer(vertexColorAttribute, 4, gl.FLOAT, false, 0, 0); + + gl.useProgram(program); + gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4); + + window.requestAnimationFrame(drawScene); + } + </script> + </body> + +</html> |