183 lines
6.7 KiB
HTML
183 lines
6.7 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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</head>
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<body>
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<canvas id="example" width="1px" height="2px"></canvas>
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<div id="description"></div>
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<div id="console"></div>
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<script>
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description('Verifies texImage2D and texSubImage2D code paths taking ArrayBufferView');
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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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// 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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var pixel = [0, 0, 0, 1];
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var correctColor = null;
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function generateRGBAData(type, unpackAlignment)
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{
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var sourceData = [ 255, 0, 0, 255,
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0, 255, 0, 0 ];
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switch (type) {
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case gl.UNSIGNED_BYTE: {
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var rowWidth = Math.max(unpackAlignment, 4);
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var data = new Uint8Array(2 * rowWidth);
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for (var y = 0; y < 2; ++y) {
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var index = y * rowWidth;
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for (var element = 0; element < 4; ++element) {
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data[index + element] = sourceData[4 * y + element];
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}
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}
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return data;
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}
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case gl.UNSIGNED_SHORT_4_4_4_4: {
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var rowWidth = Math.max(unpackAlignment, 2) / 2;
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var data = new Uint16Array(2 * rowWidth);
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for (var y = 0; y < 2; ++y) {
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var index = y * rowWidth;
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data[index] = (((sourceData[4 * y] & 0xF0) << 8)
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| ((sourceData[4 * y + 1] & 0xF0) << 4)
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| (sourceData[4 * y + 2] & 0xF0)
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| (sourceData[4 * y + 3] >> 4));
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}
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return data;
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}
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case gl.UNSIGNED_SHORT_5_5_5_1: {
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var rowWidth = Math.max(unpackAlignment, 2) / 2;
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var data = new Uint16Array(2 * rowWidth);
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for (var y = 0; y < 2; ++y) {
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var index = y * rowWidth;
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data[index] = (((sourceData[4 * y] & 0xF8) << 8)
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| ((sourceData[4 * y + 1] & 0xF8) << 3)
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| ((sourceData[4 * y + 2] & 0xF8) >> 2)
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| (sourceData[4 * y + 3] >> 7));
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}
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return data;
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}
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}
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}
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function typeToString(type)
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{
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switch (type) {
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case gl.UNSIGNED_BYTE: return 'UNSIGNED_BYTE';
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case gl.UNSIGNED_SHORT_5_5_5_1: return 'UNSIGNED_SHORT_5_5_5_1';
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case gl.UNSIGNED_SHORT_4_4_4_4: return 'UNSIGNED_SHORT_4_4_4_4';
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}
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return 'Unknown type ' + type;
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}
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function runOneIteration(useTexSubImage2D, type, unpackAlignment, flipY, premultiplyAlpha, topColor, bottomColor)
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{
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debug('Testing ' + (useTexSubImage2D ? 'texSubImage2D' : 'texImage2D') +
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' with type=' + typeToString(type) +
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', unpackAlignment=' + unpackAlignment +
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', flipY=' + flipY + ', premultiplyAlpha=' + premultiplyAlpha);
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gl.colorMask(true, true, true, true);
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gl.clearColor(0, 0, 0, 1.0);
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gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
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// Enable writes to the RGB channels
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gl.colorMask(true, true, true, false);
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var texture = gl.createTexture();
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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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// Set up texture parameters
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
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gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
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// Set up pixel store parameters
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gl.pixelStorei(gl.UNPACK_ALIGNMENT, unpackAlignment);
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gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, flipY);
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gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, premultiplyAlpha);
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// Generate the data
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var data = generateRGBAData(type, unpackAlignment);
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if (gl.getError() != gl.NO_ERROR)
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testFailed("GL error before texture upload");
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// Upload the image into the texture
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if (useTexSubImage2D) {
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// Initialize the texture to black first
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gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 2, 0,
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gl.RGBA, type, null);
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if (gl.getError() != gl.NO_ERROR)
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testFailed("GL error after texImage2D(null)");
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gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 1, 2, gl.RGBA, type, data);
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if (gl.getError() != gl.NO_ERROR)
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testFailed("GL error after texSubImage2D");
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} else {
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gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 2, 0, gl.RGBA, type, data);
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if (gl.getError() != gl.NO_ERROR)
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testFailed("GL error after texImage2D");
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}
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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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// Read back the rendering results
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buf = new Uint8Array(1 * 2 * 4);
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gl.readPixels(0, 0, 1, 2, gl.RGBA, gl.UNSIGNED_BYTE, buf);
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// Check the top pixel and bottom pixel and make sure they have
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// the right color.
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debug("Checking bottom pixel");
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wtu.checkCanvasRect(gl, 0, 0, 1, 1, bottomColor, "shouldBe " + bottomColor);
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debug("Checking top pixel");
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wtu.checkCanvasRect(gl, 0, 1, 1, 1, topColor, "shouldBe " + topColor);
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}
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function runTest()
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{
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var red = [255, 0, 0, 255];
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var green = [0, 255, 0, 255];
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var redPremultiplyAlpha = [255, 0, 0, 255];
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var greenPremultiplyAlpha = [0, 0, 0, 255];
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var types = [ gl.UNSIGNED_BYTE, gl.UNSIGNED_SHORT_5_5_5_1, gl.UNSIGNED_SHORT_4_4_4_4 ];
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var unpackAlignments = [ 1, 2, 4, 8 ];
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for (var i = 0; i < types.length; ++i) {
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var type = types[i];
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for (var j = 0; j < unpackAlignments.length; ++j) {
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var unpackAlignment = unpackAlignments[j];
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runOneIteration(false, type, unpackAlignment, true, false,
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red, green);
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runOneIteration(false, type, unpackAlignment, false, false,
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green, red);
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runOneIteration(false, type, unpackAlignment, true, true,
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redPremultiplyAlpha, greenPremultiplyAlpha);
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runOneIteration(false, type, unpackAlignment, false, true,
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greenPremultiplyAlpha, redPremultiplyAlpha);
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runOneIteration(true, type, unpackAlignment, true, false,
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red, green);
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runOneIteration(true, type, unpackAlignment, false, false,
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green, red);
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runOneIteration(true, type, unpackAlignment, true, true,
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redPremultiplyAlpha, greenPremultiplyAlpha);
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runOneIteration(true, type, unpackAlignment, false, true,
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greenPremultiplyAlpha, redPremultiplyAlpha);
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}
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}
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}
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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.disable(gl.BLEND);
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gl.clearColor(0,0,0,1);
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gl.clearDepth(1);
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textureLoc = gl.getUniformLocation(program, "tex");
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runTest();
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</script>
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</body>
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</html>
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