| <html> |
| <head> |
| <script src="../../../resources/js-test.js"></script> |
| <script src="resources/webgl-test.js"></script> |
| <script src="resources/webgl-test-utils.js"></script> |
| <script> |
| var wtu = WebGLTestUtils; |
| var gl = null; |
| var textureLoc = null; |
| |
| function init() |
| { |
| if (window.initNonKhronosFramework) { |
| window.initNonKhronosFramework(true); |
| } |
| |
| description('Tests there is no garbage in transparent regions of images uploaded as textures'); |
| |
| wtu = WebGLTestUtils; |
| var canvas = document.getElementById("example"); |
| gl = wtu.create3DContext(canvas); |
| var program = wtu.setupTexturedQuad(gl); |
| gl.clearColor(0.5,0.5,0.5,1); |
| gl.clearDepth(1); |
| |
| textureLoc = gl.getUniformLocation(program, "tex"); |
| |
| // The input texture has 8 characters; take the leftmost one |
| var coeff = 1.0 / 8.0; |
| var texCoords = new Float32Array([ |
| coeff, 1.0, |
| 0.0, 1.0, |
| 0.0, 0.0, |
| coeff, 1.0, |
| 0.0, 0.0, |
| coeff, 0.0]); |
| |
| var vbo = gl.createBuffer(); |
| gl.bindBuffer(gl.ARRAY_BUFFER, vbo); |
| gl.bufferData(gl.ARRAY_BUFFER, texCoords, gl.STATIC_DRAW); |
| gl.enableVertexAttribArray(1); |
| gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 0, 0); |
| |
| texture = wtu.loadTexture(gl, "resources/bug-32888-texture.png", runTest); |
| } |
| |
| // These two declarations need to be global for "shouldBe" to see them |
| var buf = null; |
| var idx = 0; |
| |
| function runTest() |
| { |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| gl.enable(gl.BLEND); |
| gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA); |
| // Bind the texture to texture unit 0 |
| gl.bindTexture(gl.TEXTURE_2D, texture); |
| // Point the uniform sampler to texture unit 0 |
| gl.uniform1i(textureLoc, 0); |
| // Draw the triangles |
| wtu.drawQuad(gl, [0, 0, 0, 255]); |
| |
| // Spot check a couple of 2x2 regions in the upper and lower left |
| // corners; they should be the rgb values in the texture. |
| color = [0, 0, 0]; |
| debug("Checking lower left corner"); |
| wtu.checkCanvasRect(gl, 1, gl.canvas.height - 3, 2, 2, color, |
| "shouldBe " + color); |
| debug("Checking upper left corner"); |
| wtu.checkCanvasRect(gl, 1, 1, 2, 2, color, |
| "shouldBe " + color); |
| var epilogue = document.createElement("script"); |
| epilogue.onload = finish; |
| epilogue.src = "../../../resources/js-test-post.js"; |
| document.body.appendChild(epilogue); |
| } |
| |
| function finish() { |
| if (window.nonKhronosFrameworkNotifyDone) { |
| window.nonKhronosFrameworkNotifyDone(); |
| } |
| } |
| </script> |
| </head> |
| <body onload="init()"> |
| <canvas id="example" width="32px" height="32px"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| </body> |
| </html> |
