LayoutTests/http/tests/webgl/1.0.2/resources/webgl_test_files/conformance/textures/texture-hd-dpi.html - WebKit - Git at Google

 <!--

 /*
 ** Copyright (c) 2012 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
 ** "Materials"), to deal in the Materials without restriction, including
 ** without limitation the rights to use, copy, modify, merge, publish,
 ** distribute, sublicense, and/or sell copies of the Materials, and to
 ** permit persons to whom the Materials are furnished to do so, subject to
 ** the following conditions:
 **
 ** The above copyright notice and this permission notice shall be included
 ** in all copies or substantial portions of the Materials.
 **
 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
 */

 -->

 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="utf-8">
 <title>WebGL HD-DPI issues texture conformance test.</title>
 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
 <script src="../../resources/js-test-pre.js"></script>
 <script src="../resources/webgl-test.js"> </script>
 <script src="../resources/webgl-test-utils.js"> </script>
 </head>
 <body>
 <canvas id="example" width="4" height="4" style="width: 40px; height: 30px;"></canvas>
 <div id="description"></div>
 <div id="console"></div>
 <script>
 "use strict";
 description();
 var wtu = WebGLTestUtils;
 var gl = wtu.create3DContext("example");
 var program = wtu.setupTexturedQuad(gl);

 function fillInMips(gl, size) {
   // fill in the mips
   var level = 1;
   for (;;) {
     size /= 2;
     if (size < 1) {
       break;
     }
     var numBytes = size * size * 4;
     var pixels = new Uint8Array(numBytes);
     for (var jj = 0; jj < numBytes; jj += 4) {
       pixels[jj + 0] = 0;
       pixels[jj + 1] = 255;
       pixels[jj + 2] = 0;
       pixels[jj + 3] = 255;
     }
     gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
   }
 }

 function testCanvas(size) {
   debug("");
   debug("testing 2D canvas size " + size + ", " + size);

   var canvas = document.createElement("canvas");
   canvas.width = size;
   canvas.height = size;
   var ctx = canvas.getContext("2d");
   ctx.fillStyle = "rgb(0,255,0)";
   ctx.fillRect(0, 0, size, size);

   var tex = gl.createTexture();
   gl.bindTexture(gl.TEXTURE_2D, tex);
   gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas);

   fillInMips(gl, size);

   // Draw. If this an HD-DPI device and the 2d canvas is double res or larger
   // the implementation must scale to CSS pixels (ie, canvas.width, canvas.height)(
   // when doing the copy in texImage2D. If it has not scaled and instead done
   // a direct copy of the larger texture this test will not have created enough mips
   // and will therefore not be "texture complete" and will render in black.
   wtu.clearAndDrawUnitQuad(gl);
   wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
 }

 function testWebGL(size) {
   debug("");
   debug("testing WebGL canvas size " + size + ", " + size);

   var canvas = document.createElement("canvas");
   canvas.width = size;
   canvas.height = size;
   var gl2 = wtu.create3DContext(canvas);
   gl2.clearColor(0,1,0,1);
   gl2.clear(gl.COLOR_BUFFER_BIT);

   var tex = gl.createTexture();
   gl.bindTexture(gl.TEXTURE_2D, tex);
   gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas);

   fillInMips(gl, size);

   // Draw. If this an HD-DPI device check for 2 possible bugs.
   //
   // 1) the WebGL canvas is double res or larger. That's just a bug period and
   //    is checked for in another test but would also fail here.
   //
   // 2) the WebGL canvas is single res but the code the scales a double res
   //    2d canvas also mistakenly scales a single res WebGL canvas.
   //
   // If it has been scaled then we'll have the wrong kind of mips chain here.
   // Level 0 will be half resolution. Level 1 will be the same resolution
   // and will therefore not be "texture complete" and will render in black.
   wtu.clearAndDrawUnitQuad(gl);
   wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
 }

 testCanvas(4);
 testCanvas(512);
 testWebGL(4);
 testWebGL(512);
 glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors");

 var successfullyParsed = true;

 </script>
 <script src="../../resources/js-test-post.js"></script>

 </body>
 </html>
	<!--

	/*
	** Copyright (c) 2012 The Khronos Group Inc.
	**
	** Permission is hereby granted, free of charge, to any person obtaining a
	** copy of this software and/or associated documentation files (the
	** "Materials"), to deal in the Materials without restriction, including
	** without limitation the rights to use, copy, modify, merge, publish,
	** distribute, sublicense, and/or sell copies of the Materials, and to
	** permit persons to whom the Materials are furnished to do so, subject to
	** the following conditions:
	**
	** The above copyright notice and this permission notice shall be included
	** in all copies or substantial portions of the Materials.
	**
	** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
	** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
	*/

	-->

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>WebGL HD-DPI issues texture conformance test.</title>
	<link rel="stylesheet" href="../../resources/js-test-style.css"/>
	<script src="../../resources/js-test-pre.js"></script>
	<script src="../resources/webgl-test.js"> </script>
	<script src="../resources/webgl-test-utils.js"> </script>
	</head>
	<body>
	<canvas id="example" width="4" height="4" style="width: 40px; height: 30px;"></canvas>
	<div id="description"></div>
	<div id="console"></div>
	<script>
	"use strict";
	description();
	var wtu = WebGLTestUtils;
	var gl = wtu.create3DContext("example");
	var program = wtu.setupTexturedQuad(gl);

	function fillInMips(gl, size) {
	// fill in the mips
	var level = 1;
	for (;;) {
	size /= 2;
	if (size < 1) {
	break;
	}
	var numBytes = size * size * 4;
	var pixels = new Uint8Array(numBytes);
	for (var jj = 0; jj < numBytes; jj += 4) {
	pixels[jj + 0] = 0;
	pixels[jj + 1] = 255;
	pixels[jj + 2] = 0;
	pixels[jj + 3] = 255;
	}
	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
	}
	}

	function testCanvas(size) {
	debug("");
	debug("testing 2D canvas size " + size + ", " + size);

	var canvas = document.createElement("canvas");
	canvas.width = size;
	canvas.height = size;
	var ctx = canvas.getContext("2d");
	ctx.fillStyle = "rgb(0,255,0)";
	ctx.fillRect(0, 0, size, size);

	var tex = gl.createTexture();
	gl.bindTexture(gl.TEXTURE_2D, tex);
	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas);

	fillInMips(gl, size);

	// Draw. If this an HD-DPI device and the 2d canvas is double res or larger
	// the implementation must scale to CSS pixels (ie, canvas.width, canvas.height)(
	// when doing the copy in texImage2D. If it has not scaled and instead done
	// a direct copy of the larger texture this test will not have created enough mips
	// and will therefore not be "texture complete" and will render in black.
	wtu.clearAndDrawUnitQuad(gl);
	wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
	}

	function testWebGL(size) {
	debug("");
	debug("testing WebGL canvas size " + size + ", " + size);

	var canvas = document.createElement("canvas");
	canvas.width = size;
	canvas.height = size;
	var gl2 = wtu.create3DContext(canvas);
	gl2.clearColor(0,1,0,1);
	gl2.clear(gl.COLOR_BUFFER_BIT);

	var tex = gl.createTexture();
	gl.bindTexture(gl.TEXTURE_2D, tex);
	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas);

	fillInMips(gl, size);

	// Draw. If this an HD-DPI device check for 2 possible bugs.
	//
	// 1) the WebGL canvas is double res or larger. That's just a bug period and
	// is checked for in another test but would also fail here.
	//
	// 2) the WebGL canvas is single res but the code the scales a double res
	// 2d canvas also mistakenly scales a single res WebGL canvas.
	//
	// If it has been scaled then we'll have the wrong kind of mips chain here.
	// Level 0 will be half resolution. Level 1 will be the same resolution
	// and will therefore not be "texture complete" and will render in black.
	wtu.clearAndDrawUnitQuad(gl);
	wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
	}

	testCanvas(4);
	testCanvas(512);
	testWebGL(4);
	testWebGL(512);
	glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors");

	var successfullyParsed = true;

	</script>
	<script src="../../resources/js-test-post.js"></script>

	</body>
	</html>