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