| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../resources/runner.js"></script> |
| <script src="resources/canvas_runner.js"></script> |
| <script> |
| |
| var sourceCanvas3D = document.createElement('canvas'); |
| var sourceCtx = sourceCanvas3D.getContext('webgl'); |
| var destCanvas3D = document.createElement('canvas'); |
| var destCtx = destCanvas3D.getContext('webgl'); |
| if (!sourceCtx || !destCtx) |
| CanvasRunner.logFatalError("WebGL is not supported or enabled on this platform!"); |
| var tex = null; |
| const width = 1024; |
| const height = 1024; |
| |
| function setSize(width, height) { |
| sourceCanvas3D.width = width; |
| sourceCanvas3D.height = height; |
| destCanvas3D.width = width; |
| destCanvas3D.height = height; |
| } |
| |
| function rand(range) { |
| return Math.floor(Math.random() * range); |
| } |
| |
| function renderWebGL(gl) { |
| gl.disable(gl.SCISSOR_TEST); |
| gl.clear(gl.COLOR_BUFER_BIT); |
| gl.enable(gl.SCISSOR_TEST); |
| gl.scissor(rand(width), rand(height), rand(width), rand(height)); |
| gl.clearColor(Math.random(), Math.random(), Math.random(), 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| } |
| |
| function preRun() { |
| tex = destCtx.createTexture(); |
| destCtx.bindTexture(destCtx.TEXTURE_2D, tex); |
| } |
| |
| function doRun() { |
| destCtx.texImage2D(destCtx.TEXTURE_2D, 0, destCtx.RGBA, destCtx.RGBA, destCtx.UNSIGNED_BYTE, sourceCanvas3D); |
| } |
| |
| function ensureComplete() { |
| destCtx.readPixels(0, 0, 1, 1, sourceCtx.RGBA, sourceCtx.UNSIGNED_BYTE, new Uint8Array(4)); |
| } |
| |
| function postRun() { |
| destCtx.deleteTexture(tex); |
| } |
| |
| window.onload = function () { |
| setSize(width, height); |
| renderWebGL(sourceCtx); |
| CanvasRunner.start({ |
| description: "This benchmark checks the speed on uploading WebGL(1024x1024) to WebGL Texture(1024x1024).", |
| preRun: preRun, |
| doRun: doRun, |
| ensureComplete: ensureComplete, |
| postRun: postRun}); |
| } |
| |
| </script> |
| </body> |
| </html> |
