conformance/rendering/gl-scissor-fbo-test.html - chromium/deps/webgl/sdk/tests - 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 Scissor FBO 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>
 <div id="description"></div>
 <div id="console"></div>
 <canvas id="canvas" width="16" height="16" style="width: 40px; height: 40px;"> </canvas>
 <script>
 "use strict";
 description("checks the scissor does not change when switching framebuffers");

 debug("");
 debug("Canvas.getContext");

 var wtu = WebGLTestUtils;

 function makeFramebuffer(width, height) {
   var tex = gl.createTexture();
   gl.bindTexture(gl.TEXTURE_2D, tex);
   gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
   gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
   var fb = gl.createFramebuffer();
   gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
   gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
   shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
   gl.bindFramebuffer(gl.FRAMEBUFFER, null);
   return fb;
 }

 function checkCanvasRect(x, y, width, height, color, msg) {
   debug("checking: " + x + ", " + y + ", " + width + ", " + height);
   wtu.checkCanvasRect(gl, x, y, width, height, color, msg);
 }

 var gl = wtu.create3DContext("canvas", {antialias: false});
 if (!gl) {
   testFailed("context does not exist");
 } else {
   testPassed("context exists");

   var fb8x8 = makeFramebuffer(8, 8);
   var fb32x32 = makeFramebuffer(32, 32);

   var testScissor = function(scissorX, scissorY, scissorWidth, scissorHeight, msg) {
     debug("");
     debug(msg);

     var test = function(fb, size) {
       debug("");
       debug("checking size: " + size);
       gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
       gl.clearColor(0, 1, 0, 1);
       gl.clear(gl.COLOR_BUFFER_BIT);
       var scissorRight = Math.min(scissorX + scissorWidth, size);
       var scissorTop = Math.min(scissorY + scissorHeight, size);
       var scWidth = scissorRight - scissorX;
       var scHeight = scissorTop - scissorY;
       var rightWidth = Math.min(size - scissorRight, 0);
       var topHeight = Math.max(size - scissorTop, 0);
       checkCanvasRect(scissorX, scissorY, scWidth, scHeight, [0, 255, 0, 255], "should be green");
       checkCanvasRect(0, 0, size, scissorY, [255, 0, 0, 255], "should be red");
       checkCanvasRect(0, scissorTop, size, topHeight, [255, 0, 0, 255], "should be red");
       checkCanvasRect(0, 0, scissorX, size, [255, 0, 0, 255], "should be red");
       checkCanvasRect(scissorRight, 0, scissorX, rightWidth, [255, 0, 0, 255], "should be red");
     };

     gl.disable(gl.SCISSOR_TEST);
     gl.clearColor(1, 0, 0, 1);
     gl.bindFramebuffer(gl.FRAMEBUFFER, null);
     gl.clear(gl.COLOR_BUFFER_BIT);
     gl.bindFramebuffer(gl.FRAMEBUFFER, fb8x8);
     gl.clear(gl.COLOR_BUFFER_BIT);
     gl.bindFramebuffer(gl.FRAMEBUFFER, fb32x32);
     gl.clear(gl.COLOR_BUFFER_BIT);

     gl.bindFramebuffer(gl.FRAMEBUFFER, fb32x32);
     gl.enable(gl.SCISSOR_TEST);
     gl.scissor(scissorX, scissorY, scissorWidth, scissorHeight);
     test(null, 16);
     test(fb8x8, 8);
     test(fb32x32, 32);
     test(null, 16);
   };

   testScissor(2, 4, 12, 10, "test scissor in middle");
   testScissor(0, 0, 12, 10, "test scissor at 0,0");
   testScissor(0, 0, 16, 16, "test scissor with size that matches drawingbuffer");

   glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
 }

 debug("");
 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 Scissor FBO 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>
	<div id="description"></div>
	<div id="console"></div>
	<canvas id="canvas" width="16" height="16" style="width: 40px; height: 40px;"> </canvas>
	<script>
	"use strict";
	description("checks the scissor does not change when switching framebuffers");

	debug("");
	debug("Canvas.getContext");

	var wtu = WebGLTestUtils;

	function makeFramebuffer(width, height) {
	var tex = gl.createTexture();
	gl.bindTexture(gl.TEXTURE_2D, tex);
	gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
	gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
	var fb = gl.createFramebuffer();
	gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
	gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
	shouldBe('gl.checkFramebufferStatus(gl.FRAMEBUFFER)', 'gl.FRAMEBUFFER_COMPLETE');
	gl.bindFramebuffer(gl.FRAMEBUFFER, null);
	return fb;
	}

	function checkCanvasRect(x, y, width, height, color, msg) {
	debug("checking: " + x + ", " + y + ", " + width + ", " + height);
	wtu.checkCanvasRect(gl, x, y, width, height, color, msg);
	}

	var gl = wtu.create3DContext("canvas", {antialias: false});
	if (!gl) {
	testFailed("context does not exist");
	} else {
	testPassed("context exists");

	var fb8x8 = makeFramebuffer(8, 8);
	var fb32x32 = makeFramebuffer(32, 32);

	var testScissor = function(scissorX, scissorY, scissorWidth, scissorHeight, msg) {
	debug("");
	debug(msg);

	var test = function(fb, size) {
	debug("");
	debug("checking size: " + size);
	gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
	gl.clearColor(0, 1, 0, 1);
	gl.clear(gl.COLOR_BUFFER_BIT);
	var scissorRight = Math.min(scissorX + scissorWidth, size);
	var scissorTop = Math.min(scissorY + scissorHeight, size);
	var scWidth = scissorRight - scissorX;
	var scHeight = scissorTop - scissorY;
	var rightWidth = Math.min(size - scissorRight, 0);
	var topHeight = Math.max(size - scissorTop, 0);
	checkCanvasRect(scissorX, scissorY, scWidth, scHeight, [0, 255, 0, 255], "should be green");
	checkCanvasRect(0, 0, size, scissorY, [255, 0, 0, 255], "should be red");
	checkCanvasRect(0, scissorTop, size, topHeight, [255, 0, 0, 255], "should be red");
	checkCanvasRect(0, 0, scissorX, size, [255, 0, 0, 255], "should be red");
	checkCanvasRect(scissorRight, 0, scissorX, rightWidth, [255, 0, 0, 255], "should be red");
	};

	gl.disable(gl.SCISSOR_TEST);
	gl.clearColor(1, 0, 0, 1);
	gl.bindFramebuffer(gl.FRAMEBUFFER, null);
	gl.clear(gl.COLOR_BUFFER_BIT);
	gl.bindFramebuffer(gl.FRAMEBUFFER, fb8x8);
	gl.clear(gl.COLOR_BUFFER_BIT);
	gl.bindFramebuffer(gl.FRAMEBUFFER, fb32x32);
	gl.clear(gl.COLOR_BUFFER_BIT);

	gl.bindFramebuffer(gl.FRAMEBUFFER, fb32x32);
	gl.enable(gl.SCISSOR_TEST);
	gl.scissor(scissorX, scissorY, scissorWidth, scissorHeight);
	test(null, 16);
	test(fb8x8, 8);
	test(fb32x32, 32);
	test(null, 16);
	};

	testScissor(2, 4, 12, 10, "test scissor in middle");
	testScissor(0, 0, 12, 10, "test scissor at 0,0");
	testScissor(0, 0, 16, 16, "test scissor with size that matches drawingbuffer");

	glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
	}

	debug("");
	var successfullyParsed = true;
	</script>
	<script src="../../resources/js-test-post.js"></script>

	</body>
	</html>