Add ToT WebGL conformance tests : part 10

conformance/resources/tex-image-and-sub-image-2d-with-image.js

Index: conformance/resources/tex-image-and-sub-image-2d-with-image.js
===================================================================
--- conformance/resources/tex-image-and-sub-image-2d-with-image.js	(revision 0)
+++ conformance/resources/tex-image-and-sub-image-2d-with-image.js	(working copy)
@@ -0,0 +1,147 @@
+/*
+** Copyright (c) 2012 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+function generateTest(pixelFormat, pixelType, pathToTestRoot, prologue) {
+    var wtu = WebGLTestUtils;
+    var gl = null;
+    var textureLoc = null;
+    var successfullyParsed = false;
+    var imgCanvas;
+    var red = [255, 0, 0];
+    var green = [0, 255, 0];
+
+    var init = function()
+    {
+        description('Verify texImage2D and texSubImage2D code paths taking image elements (' + pixelFormat + '/' + pixelType + ')');
+
+        gl = wtu.create3DContext("example");
+
+        if (!prologue(gl)) {
+            finishTest();
+            return;
+        }
+
+        var program = wtu.setupTexturedQuad(gl);
+
+        gl.clearColor(0,0,0,1);
+        gl.clearDepth(1);
+
+        textureLoc = gl.getUniformLocation(program, "tex");
+
+        wtu.loadTexture(gl, pathToTestRoot + "/resources/red-green.png", runTest);
+    }
+
+    function runOneIteration(image, useTexSubImage2D, flipY, topColor, bottomColor)
+    {
+        debug('Testing ' + (useTexSubImage2D ? 'texSubImage2D' : 'texImage2D') +
+              ' with flipY=' + flipY);
+        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+        // Disable any writes to the alpha channel
+        gl.colorMask(1, 1, 1, 0);
+        var texture = gl.createTexture();
+        // Bind the texture to texture unit 0
+        gl.bindTexture(gl.TEXTURE_2D, texture);
+        // Set up texture parameters
+        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+        gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+        // Set up pixel store parameters
+        gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, flipY);
+        gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, false);
+        gl.pixelStorei(gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, gl.NONE);
+        // Upload the image into the texture
+        if (useTexSubImage2D) {
+            // Initialize the texture to black first
+            gl.texImage2D(gl.TEXTURE_2D, 0, gl[pixelFormat], image.width, image.height, 0,
+                          gl[pixelFormat], gl[pixelType], null);
+            gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl[pixelFormat], gl[pixelType], image);
+        } else {
+            gl.texImage2D(gl.TEXTURE_2D, 0, gl[pixelFormat], gl[pixelFormat], gl[pixelType], image);
+        }
+
+        // Point the uniform sampler to texture unit 0
+        gl.uniform1i(textureLoc, 0);
+        // Draw the triangles
+        wtu.clearAndDrawUnitQuad(gl, [0, 0, 0, 255]);
+        // Check a few pixels near the top and bottom and make sure they have
+        // the right color.
+        debug("Checking lower left corner");
+        wtu.checkCanvasRect(gl, 4, 4, 2, 2, bottomColor,
+                            "shouldBe " + bottomColor);
+        debug("Checking upper left corner");
+        wtu.checkCanvasRect(gl, 4, gl.canvas.height - 8, 2, 2, topColor,
+                            "shouldBe " + topColor);
+    }
+
+    function runTestOnImage(image) {
+        runOneIteration(image, false, true, red, green);
+        runOneIteration(image, false, false, green, red);
+        runOneIteration(image, true, true, red, green);
+        runOneIteration(image, true, false, green, red);
+    }
+
+    function runTest(image)
+    {
+        runTestOnImage(image);
+
+        imgCanvas = document.createElement("canvas");
+        imgCanvas.width = 1;
+        imgCanvas.height = 2;
+        var imgCtx = imgCanvas.getContext("2d");
+        var imgData = imgCtx.createImageData(1, 2);
+        imgData.data[0] = red[0];
+        imgData.data[1] = red[1];
+        imgData.data[2] = red[2];
+        imgData.data[3] = 255;
+        imgData.data[4] = green[0];
+        imgData.data[5] = green[1];
+        imgData.data[6] = green[2];
+        imgData.data[7] = 255;
+        imgCtx.putImageData(imgData, 0, 0);
+
+        // apparently Image is different than <img>.
+        var newImage =  new Image();
+        newImage.onload = function() {
+            runTest2(newImage);
+        };
+        newImage.src = imgCanvas.toDataURL();
+    }
+
+    function runTest2(image) {
+        runTestOnImage(image);
+
+        var newImage = document.createElement("img");
+        newImage.onload = function() {
+            runTest3(newImage);
+        };
+        newImage.src = imgCanvas.toDataURL();
+    }
+
+    function runTest3(image) {
+        runTestOnImage(image);
+
+        glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
+        finishTest();
+    }
+
+    return init;
+}
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