third_party/WebKit/LayoutTests/fast/canvas/webgl/resources/tex-image-and-sub-image-2d-with-image-data.js

   1 function generateTest(pixelFormat, pixelType, prologue) {
   2     var wtu = WebGLTestUtils;
   3     var gl = null;
   4     var textureLoc = null;
   5     var successfullyParsed = false;
   6     var imageData = null;
   7
   8     var init = function()
   9     {
  10         if (window.initNonKhronosFramework) {
  11             window.initNonKhronosFramework(true);
  12         }
  13
  14         description('Verify texImage2D and texSubImage2D code paths taking ImageData (' + pixelFormat + '/' + pixelType + ')');
  15
  16         gl = wtu.create3DContext("example");
  17
  18         if (!prologue(gl)) {
  19             finishTest();
  20             return;
  21         }
  22
  23         var program = wtu.setupTexturedQuad(gl);
  24         gl.clearColor(0,0,0,1);
  25         gl.clearDepth(1);
  26         gl.disable(gl.BLEND);
  27
  28         textureLoc = gl.getUniformLocation(program, "tex");
  29
  30         var canvas2d = document.getElementById("texcanvas");
  31         var context2d = canvas2d.getContext("2d");
  32         imageData = context2d.createImageData(1, 2);
  33         var data = imageData.data;
  34         data[0] = 255;
  35         data[1] = 0;
  36         data[2] = 0;
  37         data[3] = 255;
  38         data[4] = 0;
  39         data[5] = 255;
  40         data[6] = 0;
  41         data[7] = 0;
  42
  43         runTest();
  44     }
  45
  46     function runOneIteration(useTexSubImage2D, flipY, premultiplyAlpha, topColor, bottomColor)
  47     {
  48         debug('Testing ' + (useTexSubImage2D ? 'texSubImage2D' : 'texImage2D') +
  49               ' with flipY=' + flipY + ' and premultiplyAlpha=' + premultiplyAlpha);
  50         gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  51         // Enable writes to the RGBA channels
  52         gl.colorMask(1, 1, 1, 0);
  53         var texture = gl.createTexture();
  54         // Bind the texture to texture unit 0
  55         gl.bindTexture(gl.TEXTURE_2D, texture);
  56         // Set up texture parameters
  57         gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  58         gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
  59         // Set up pixel store parameters
  60         gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, flipY);
  61         gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, premultiplyAlpha);
  62         // Upload the image into the texture
  63         if (useTexSubImage2D) {
  64             // Initialize the texture to black first
  65             gl.texImage2D(gl.TEXTURE_2D, 0, gl[pixelFormat], 1, 2, 0,
  66                           gl[pixelFormat], gl[pixelType], null);
  67             gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl[pixelFormat], gl[pixelType], imageData);
  68         } else {
  69             gl.texImage2D(gl.TEXTURE_2D, 0, gl[pixelFormat], gl[pixelFormat], gl[pixelType], imageData);
  70         }
  71
  72         // Point the uniform sampler to texture unit 0
  73         gl.uniform1i(textureLoc, 0);
  74         // Draw the triangles
  75         wtu.drawQuad(gl, [0, 0, 0, 255]);
  76
  77         // Check the top pixel and bottom pixel and make sure they have
  78         // the right color.
  79         debug("Checking bottom pixel");
  80         wtu.checkCanvasRect(gl, 0, 0, 1, 1, bottomColor, "shouldBe " + bottomColor);
  81         debug("Checking top pixel");
  82         wtu.checkCanvasRect(gl, 0, 1, 1, 1, topColor, "shouldBe " + topColor);
  83     }
  84
  85     function runTest()
  86     {
  87         var red = [255, 0, 0, 255];
  88         var green = [0, 255, 0, 255];
  89         var redPremultiplyAlpha = [255, 0, 0, 255];
  90         var greenPremultiplyAlpha = [0, 0, 0, 255];
  91
  92         runOneIteration(false, true, false,
  93                         red, green);
  94         runOneIteration(false, false, false,
  95                         green, red);
  96         runOneIteration(false, true, true,
  97                         redPremultiplyAlpha, greenPremultiplyAlpha);
  98         runOneIteration(false, false, true,
  99                         greenPremultiplyAlpha, redPremultiplyAlpha);
 100         runOneIteration(true, true, false,
 101                         red, green);
 102         runOneIteration(true, false, false,
 103                         green, red);
 104         runOneIteration(true, true, true,
 105                         redPremultiplyAlpha, greenPremultiplyAlpha);
 106         runOneIteration(true, false, true,
 107                         greenPremultiplyAlpha, redPremultiplyAlpha);
 108
 109         glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
 110         finishTest();
 111     }
 112
 113     return init;
 114 }