LayoutTests/webgl/2.0.0/resources/webgl_test_files/conformance2/rendering/blitframebuffer-scissor-enabled.html - WebKit - Git at Google

 <!--

 /*
 ** Copyright (c) 2016 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 BlitFramebuffer Tests</title>
 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
 <script src="../../js/js-test-pre.js"></script>
 <script src="../../js/webgl-test-utils.js"></script>
 </head>
 <body>
 <canvas id="example" width="8" height="8"></canvas>
 <div id="description"></div>
 <div id="console"></div>

 <script>
 "use strict";

 var wtu = WebGLTestUtils;
 description("This test verifies the functionality of blitFramebuffer when scissor test is enabled.");

 var gl = wtu.create3DContext("example", undefined, 2);

 // Define the src region and dst region for blitFramebuffer
 var blit_src = [0, 0, 4, 4];
 var blit_dst = [2, 2, 6, 6];

 if (!gl) {
     testFailed("WebGL context does not exist");
 } else {
     testPassed("WebGL context exists");

     var bounds = [
         [0, 0, 4, 4], // Partially intersects with blitFramebuffer's dst region
         [0, 0, 2, 2], // No intersection with blitFramebuffer's dst region
     ];

     // We can compute the real drawing area by intersecting the scissor bound with dst region of blitting.
     var intersections = [
         [2, 2, 4, 4],
         [0, 0, 0, 0],
     ];

     for (var ii = 0; ii < bounds.length; ++ii) {
         blitframebuffer_scissor(gl.RGBA8, gl.RGBA8, bounds[ii], intersections[ii]);
         blitframebuffer_scissor(gl.RGBA8, gl.SRGB8_ALPHA8, bounds[ii], intersections[ii]);
         blitframebuffer_scissor(gl.SRGB8_ALPHA8, gl.RGBA8, bounds[ii], intersections[ii]);
         blitframebuffer_scissor(gl.SRGB8_ALPHA8, gl.SRGB8_ALPHA8, bounds[ii], intersections[ii]);
     }
 }

 function checkPixel(color, expectedColor) {
   var tolerance = 3;
   return (Math.abs(color[0] - expectedColor[0]) <= tolerance &&
           Math.abs(color[1] - expectedColor[1]) <= tolerance &&
           Math.abs(color[2] - expectedColor[2]) <= tolerance &&
           Math.abs(color[3] - expectedColor[3]) <= tolerance);
 }

 function blitframebuffer_scissor(readbufferFormat, drawbufferFormat, bound, intersection) {
     debug("");
     debug("read buffer format is: " + wtu.glEnumToString(gl, readbufferFormat) + ", draw buffer format is: " + wtu.glEnumToString(gl, drawbufferFormat));


     // Initiate data to read framebuffer
     var size = 8;
     var data = new Uint8Array(size * size * 4);
     var color = [250, 100, 15, 255];
     for (var ii = 0; ii < size * size * 4; ii += 4) {
         for (var jj = 0; jj < 4; ++jj) {
           data[ii + jj] = color[jj];
         }
     }

     // Feed data to read buffer. Feed 0 to draw buffer.
     var tex_read = gl.createTexture();
     gl.bindTexture(gl.TEXTURE_2D, tex_read);
     gl.texImage2D(gl.TEXTURE_2D, 0, readbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, data);

     var fbo_read = gl.createFramebuffer();
     gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_read);
     gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex_read, 0);

     var tex_draw = gl.createTexture();
     gl.bindTexture(gl.TEXTURE_2D, tex_draw);
     gl.texImage2D(gl.TEXTURE_2D, 0, drawbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);

     var fbo_draw = gl.createFramebuffer();
     gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fbo_draw);
     gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex_draw, 0);
     if (gl.checkFramebufferStatus(gl.READ_FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE || gl.checkFramebufferStatus(gl.DRAW_FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
         testFailed("Framebuffer incomplete.");
         return;
     }

     // Enable scissor test. Then blit framebuffer.
     gl.enable(gl.SCISSOR_TEST);
     gl.scissor(bound[0], bound[1], bound[2], bound[3]);
     gl.blitFramebuffer(blit_src[0], blit_src[1], blit_src[2], blit_src[3], blit_dst[0], blit_dst[1], blit_dst[2], blit_dst[3], gl.COLOR_BUFFER_BIT, gl.LINEAR);
     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "blitframebuffer should succeed");

     // Read pixels and Comparison
     var pixels = new Uint8Array(size * size * 4);
     gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_draw);
     gl.readPixels(0, 0, size, size, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
     wtu.glErrorShouldBe(gl, gl.NO_ERROR, "readPixels should succeed");

     var blitColor;
     var expectedColor;
     var clearColor = [0, 0, 0, 0];

     if (readbufferFormat == drawbufferFormat) {
         blitColor = color;
     } else if (readbufferFormat == gl.SRGB8_ALPHA8) {
         blitColor = wtu.sRGBToLinear(color);
     } else {
         blitColor = wtu.linearToSRGB(color);
     }

     var failed = false;
     for (var ii = 0; ii < size; ++ii) {
         for (var jj = 0; jj < size; ++jj) {
             if (ii >= intersection[0] && jj >= intersection[1] && ii < intersection[2] && jj < intersection[3]) {
                 expectedColor = blitColor;
             } else {
                 expectedColor = clearColor;
             }
             var index = (ii * size + jj) * 4;
             var pixelColor = [pixels[index], pixels[index + 1], pixels[index + 2], pixels[index + 3]];
             if (checkPixel(pixelColor, expectedColor) == false) {
                 failed = true;
                 debug("Pixels comparison failed. Pixel at [" + jj + ", " + ii + "] should be (" + expectedColor + "), but the actual color is (" + pixelColor + ")");
             }
         }
     }
     if (failed == false) {
         testPassed("All pixels comparision passed!");
     }

     // Deinit
     gl.bindTexture(gl.TEXTURE_2D, null);
     gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
     gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);
     gl.deleteFramebuffer(fbo_read);
     gl.deleteFramebuffer(fbo_draw);
     gl.deleteTexture(tex_read);
     gl.deleteTexture(tex_draw);
 };

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

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

	/*
	** Copyright (c) 2016 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 BlitFramebuffer Tests</title>
	<link rel="stylesheet" href="../../resources/js-test-style.css"/>
	<script src="../../js/js-test-pre.js"></script>
	<script src="../../js/webgl-test-utils.js"></script>
	</head>
	<body>
	<canvas id="example" width="8" height="8"></canvas>
	<div id="description"></div>
	<div id="console"></div>

	<script>
	"use strict";

	var wtu = WebGLTestUtils;
	description("This test verifies the functionality of blitFramebuffer when scissor test is enabled.");

	var gl = wtu.create3DContext("example", undefined, 2);

	// Define the src region and dst region for blitFramebuffer
	var blit_src = [0, 0, 4, 4];
	var blit_dst = [2, 2, 6, 6];

	if (!gl) {
	testFailed("WebGL context does not exist");
	} else {
	testPassed("WebGL context exists");

	var bounds = [
	[0, 0, 4, 4], // Partially intersects with blitFramebuffer's dst region
	[0, 0, 2, 2], // No intersection with blitFramebuffer's dst region
	];

	// We can compute the real drawing area by intersecting the scissor bound with dst region of blitting.
	var intersections = [
	[2, 2, 4, 4],
	[0, 0, 0, 0],
	];

	for (var ii = 0; ii < bounds.length; ++ii) {
	blitframebuffer_scissor(gl.RGBA8, gl.RGBA8, bounds[ii], intersections[ii]);
	blitframebuffer_scissor(gl.RGBA8, gl.SRGB8_ALPHA8, bounds[ii], intersections[ii]);
	blitframebuffer_scissor(gl.SRGB8_ALPHA8, gl.RGBA8, bounds[ii], intersections[ii]);
	blitframebuffer_scissor(gl.SRGB8_ALPHA8, gl.SRGB8_ALPHA8, bounds[ii], intersections[ii]);
	}
	}

	function checkPixel(color, expectedColor) {
	var tolerance = 3;
	return (Math.abs(color[0] - expectedColor[0]) <= tolerance &&
	Math.abs(color[1] - expectedColor[1]) <= tolerance &&
	Math.abs(color[2] - expectedColor[2]) <= tolerance &&
	Math.abs(color[3] - expectedColor[3]) <= tolerance);
	}

	function blitframebuffer_scissor(readbufferFormat, drawbufferFormat, bound, intersection) {
	debug("");
	debug("read buffer format is: " + wtu.glEnumToString(gl, readbufferFormat) + ", draw buffer format is: " + wtu.glEnumToString(gl, drawbufferFormat));


	// Initiate data to read framebuffer
	var size = 8;
	var data = new Uint8Array(size * size * 4);
	var color = [250, 100, 15, 255];
	for (var ii = 0; ii < size * size * 4; ii += 4) {
	for (var jj = 0; jj < 4; ++jj) {
	data[ii + jj] = color[jj];
	}
	}

	// Feed data to read buffer. Feed 0 to draw buffer.
	var tex_read = gl.createTexture();
	gl.bindTexture(gl.TEXTURE_2D, tex_read);
	gl.texImage2D(gl.TEXTURE_2D, 0, readbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, data);

	var fbo_read = gl.createFramebuffer();
	gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_read);
	gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex_read, 0);

	var tex_draw = gl.createTexture();
	gl.bindTexture(gl.TEXTURE_2D, tex_draw);
	gl.texImage2D(gl.TEXTURE_2D, 0, drawbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);

	var fbo_draw = gl.createFramebuffer();
	gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fbo_draw);
	gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex_draw, 0);
	if (gl.checkFramebufferStatus(gl.READ_FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE \|\| gl.checkFramebufferStatus(gl.DRAW_FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
	testFailed("Framebuffer incomplete.");
	return;
	}

	// Enable scissor test. Then blit framebuffer.
	gl.enable(gl.SCISSOR_TEST);
	gl.scissor(bound[0], bound[1], bound[2], bound[3]);
	gl.blitFramebuffer(blit_src[0], blit_src[1], blit_src[2], blit_src[3], blit_dst[0], blit_dst[1], blit_dst[2], blit_dst[3], gl.COLOR_BUFFER_BIT, gl.LINEAR);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "blitframebuffer should succeed");

	// Read pixels and Comparison
	var pixels = new Uint8Array(size * size * 4);
	gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_draw);
	gl.readPixels(0, 0, size, size, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
	wtu.glErrorShouldBe(gl, gl.NO_ERROR, "readPixels should succeed");

	var blitColor;
	var expectedColor;
	var clearColor = [0, 0, 0, 0];

	if (readbufferFormat == drawbufferFormat) {
	blitColor = color;
	} else if (readbufferFormat == gl.SRGB8_ALPHA8) {
	blitColor = wtu.sRGBToLinear(color);
	} else {
	blitColor = wtu.linearToSRGB(color);
	}

	var failed = false;
	for (var ii = 0; ii < size; ++ii) {
	for (var jj = 0; jj < size; ++jj) {
	if (ii >= intersection[0] && jj >= intersection[1] && ii < intersection[2] && jj < intersection[3]) {
	expectedColor = blitColor;
	} else {
	expectedColor = clearColor;
	}
	var index = (ii * size + jj) * 4;
	var pixelColor = [pixels[index], pixels[index + 1], pixels[index + 2], pixels[index + 3]];
	if (checkPixel(pixelColor, expectedColor) == false) {
	failed = true;
	debug("Pixels comparison failed. Pixel at [" + jj + ", " + ii + "] should be (" + expectedColor + "), but the actual color is (" + pixelColor + ")");
	}
	}
	}
	if (failed == false) {
	testPassed("All pixels comparision passed!");
	}

	// Deinit
	gl.bindTexture(gl.TEXTURE_2D, null);
	gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
	gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);
	gl.deleteFramebuffer(fbo_read);
	gl.deleteFramebuffer(fbo_draw);
	gl.deleteTexture(tex_read);
	gl.deleteTexture(tex_draw);
	};

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

	</body>
	</html>