| <!-- |
| 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 Sampler Drawing 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_drawing" width="12" height="12"></canvas> |
| <canvas id="canvas_texture" width="2" height="2"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| description("Tests drawing with sampler works as expected"); |
| debug(""); |
| |
| var wtu = WebGLTestUtils; |
| var gl = wtu.create3DContext("canvas_drawing", null, 2); |
| var canvas_texture = null; |
| var samplerParam = [ |
| gl.REPEAT, |
| gl.CLAMP_TO_EDGE, |
| gl.MIRRORED_REPEAT, |
| ]; |
| var color = [200, 0, 254, 255]; |
| |
| if (!gl) { |
| testFailed("WebGL context does not exist"); |
| } else { |
| testPassed("WebGL context exists"); |
| |
| wtu.setupTexturedQuadWithTexCoords(gl, [-2.5, -2.5], [3.5, 3.5]); |
| |
| setupCanvasTexture(); |
| for (var ii = 0; ii < samplerParam.length; ++ii) { |
| runDrawingTest(samplerParam[ii]); |
| } |
| |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors"); |
| } |
| |
| function setupCanvasTexture() { |
| canvas_texture = document.getElementById("canvas_texture"); |
| var ctx2d = canvas_texture.getContext("2d"); |
| ctx2d.fillStyle = "rgba(" + color[0] + "," + color[1] + "," + color[2] + "," + color[3] + ")"; |
| ctx2d.fillRect(0, 0, 1, 1); |
| } |
| |
| function runDrawingTest(param) { |
| var texture = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, texture); |
| gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas_texture); |
| |
| var sampler = gl.createSampler(); |
| gl.samplerParameteri(sampler, gl.TEXTURE_MAG_FILTER, gl.NEAREST); |
| gl.samplerParameteri(sampler, gl.TEXTURE_MIN_FILTER, gl.NEAREST); |
| gl.samplerParameteri(sampler, gl.TEXTURE_WRAP_S, param); |
| gl.samplerParameteri(sampler, gl.TEXTURE_WRAP_T, param); |
| |
| gl.clearColor(1,1,1,1); |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| |
| gl.bindTexture(gl.TEXTURE_2D, texture); |
| gl.bindSampler(0, sampler); |
| gl.drawArrays(gl.TRIANGLE_STRIP, 0, 6); |
| |
| checkPixels(param); |
| } |
| |
| function checkPixels(param) { |
| var buf = new Uint8Array(12 * 12 * 4); |
| gl.readPixels(0, 0, 12, 12, gl.RGBA, gl.UNSIGNED_BYTE, buf); |
| var passed = true; |
| for (var yy = 0; yy < 12; ++yy) { |
| for (var xx = 0; xx < 12; ++xx) { |
| var ec = [0, 0, 0, 0]; |
| switch (param) { |
| case gl.REPEAT: |
| if (xx % 2 == 1 && yy % 2 == 1) { |
| ec = color; |
| } |
| break; |
| case gl.CLAMP_TO_EDGE: |
| if (xx < 6 && yy < 6) { |
| ec = color; |
| } |
| break; |
| case gl.MIRRORED_REPEAT: |
| if (xx % 4 < 2 && yy % 4 < 2) { |
| ec = color; |
| } |
| break; |
| } |
| var off = (yy * 12 + xx) * 4; |
| if (buf[off + 0] != ec[0] || buf[off + 1] != ec[1] || |
| buf[off + 2] != ec[2] || buf[off + 3] != ec[3]) { |
| var msg = 'at (' + xx + ', ' + yy + ') expected: ' + |
| ec[0] + ', ' + ec[1] + ', ' + ec[2] + ', ' + ec[3] + ' found: ' + |
| buf[off + 0] + ', ' + buf[off + 1] + ', ' + buf[off + 2] + ', ' + buf[off + 3]; |
| testFailed(msg); |
| passed = false; |
| } |
| } |
| } |
| if (passed) { |
| testPassed("Drawing with wrap " + wtu.glEnumToString(gl, param) + " as expected"); |
| } |
| } |
| |
| var successfullyParsed = true; |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |