| <!-- |
| Copyright (c) 2019 The Khronos Group Inc. |
| Use of this source code is governed by an MIT-style license that can be |
| found in the LICENSE.txt file. |
| --> |
| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL framebuffer texture attachment switching conformance test.</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="canvas" width="64" height="64"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| description("Test framebuffer texture attachment switching. The test uses one framebuffer object and switches its color attachment."); |
| var wtu = WebGLTestUtils; |
| var canvas = document.getElementById("canvas"); |
| |
| var gl = wtu.create3DContext("canvas"); |
| var program = wtu.setupTexturedQuad(gl); |
| |
| var fb = gl.createFramebuffer(); |
| gl.bindFramebuffer(gl.FRAMEBUFFER, fb); |
| |
| var tex2 = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, tex2); |
| gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, canvas.width, canvas.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); |
| |
| var tex1 = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, tex1); |
| gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, canvas.width, canvas.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); |
| gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); |
| |
| gl.clearColor(1.0, 1.0, 1.0, 1.0); |
| |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup."); |
| |
| var iterate = function(checkFBOs, iterations) { |
| for (var i = 0; i < iterations; ++i) { |
| debug("Clearing tex1 to white"); |
| gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex1, 0); |
| if (checkFBOs) |
| shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE"); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| debug("Copying tex1 to tex2"); |
| gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex2, 0); |
| if (checkFBOs) |
| shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE"); |
| gl.drawArrays(gl.TRIANGLES, 0, 6); |
| } |
| // Read what is in tex2 |
| wtu.checkCanvas(gl, [255,255,255,255], "tex2 should be white"); |
| }; |
| |
| debug(""); |
| debug("Warm-up iteration"); |
| iterate(true, 1); |
| |
| debug(""); |
| debug("Iterating the test a few times since at least one bug it has exposed is somewhat flaky."); |
| for (var i = 0; i < 3; ++i) { |
| debug(""); |
| debug("Iteration " + (i + 1)); |
| iterate(false, 2); |
| } |
| |
| debug(""); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors at the end of the test."); |
| |
| finishTest(); |
| |
| var successfullyParsed = true; |
| </script> |
| </body> |
| </html> |
| |