| <!DOCTYPE HTML> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| |
| // This test examines the color managed ImageBitmapRenderingContext. |
| // - We first draw on 2D canvas with different color space and alpha |
| // properties. |
| // - Next, the canvas is used as a source image to create an ImageBitmap. |
| // Different colorSpaceConversion values are tested when creating the |
| // intermediate ImageBitmap object. |
| // - Next, ImageBitmap is transferred to an ImageBitmapRenderingContext. |
| // - Since we cannot read back pixels from ImageBitmapRenderingContext, we |
| // draw it to another 2D canvas and read back the pixels. |
| // - Finally, we compare the pixels read from the first 2D canvas with those |
| // read from the final 2D canvas. We expect them to match with some |
| // tolerance. |
| |
| function testPixels(actualPixels, expectedPixels, testScenario) |
| { |
| var tolerance = 0; |
| if (testScenario.pixelFormat == "float16") |
| tolerance = 0.01; |
| |
| assert_array_approx_equals(actualPixels, expectedPixels, tolerance); |
| } |
| |
| function generateFillStyle(red, green, blue, alpha) { |
| return "rgba(" + red + "," + green + "," + blue + "," + alpha + ")"; |
| } |
| |
| function generateExpectedResult(testScenario, canvas) |
| { |
| var ctx = canvas.getContext('2d', {colorSpace: testScenario.colorSpace, |
| pixelFormat: testScenario.pixelFormat}); |
| ctx.fillStyle = generateFillStyle(155, 27, 27, testScenario.alpha); |
| ctx.fillRect(0, 0, 1, 1); |
| ctx.fillStyle = generateFillStyle(27, 155, 27, testScenario.alpha); |
| ctx.fillRect(1, 0, 1, 1); |
| ctx.fillStyle = generateFillStyle(27, 27, 155, testScenario.alpha); |
| ctx.fillRect(0, 1, 1, 1); |
| ctx.fillStyle = generateFillStyle(27, 27, 27, testScenario.alpha); |
| ctx.fillRect(1, 1, 1, 1); |
| return ctx.getImageData(0, 0, 2, 2).dataUnion; |
| } |
| |
| function generateTestName(testScenario) { |
| var str = "Testing ImageBitmapRenderingContext:" + |
| " Source color space: " + testScenario.colorSpace + |
| ", pixel format: " + testScenario.pixelFormat + |
| ", alpha: " + testScenario.alpha + |
| ", intermediate color space: " + |
| testScenario.colorSpaceConversion; |
| return str; |
| } |
| |
| function runTransferFromImageBitmapTest(testScenario) { |
| var canvas = document.createElement("canvas"); |
| canvas.width = 2; |
| canvas.height = 2; |
| var expectedPixels = generateExpectedResult(testScenario, canvas); |
| |
| promise_test(function() { |
| var options = {colorSpaceConversion: testScenario.colorSpaceConversion}; |
| var promise = createImageBitmap(canvas, options); |
| return Promise.all([promise]).then(([imagebitmap]) => { |
| var dstCanvas = document.createElement("canvas"); |
| dstCanvas.width = 2; |
| dstCanvas.height = 2; |
| var dstCtx = dstCanvas.getContext('bitmaprenderer'); |
| dstCtx.transferFromImageBitmap(imagebitmap); |
| |
| // ImageBitmapRenderingContext does not have ImageData, so we draw |
| // it on another canvas and read back the data. |
| var finalCanvas = document.createElement("canvas"); |
| finalCanvas.width = 2; |
| finalCanvas.height = 2; |
| var ctx = finalCanvas.getContext('2d', |
| {colorSpace: testScenario.colorSpace, |
| pixelFormat: testScenario.pixelFormat}); |
| ctx.drawImage(dstCanvas, 0, 0); |
| var actualPixels = ctx.getImageData(0, 0, 2, 2).dataUnion; |
| testPixels(actualPixels, expectedPixels, testScenario); |
| }); |
| }, generateTestName(testScenario)); |
| } |
| |
| |
| function runAllTests() { |
| var colorSpaces = [ |
| {colorSpace: 'srgb', pixelFormat: 'uint8'}, |
| {colorSpace: 'srgb', pixelFormat: 'float16'}, |
| ]; |
| var alphaValues = [0.5, 1]; |
| var colorSpaceConversions = ['none', 'default']; |
| |
| var testScenarios = []; |
| for (var i = 0; i < colorSpaces.length; i++) |
| for (var j = 0; j < alphaValues.length; j++) |
| for (var k = 0; k < colorSpaceConversions.length; k++) { |
| var testScenario = {}; |
| testScenario.colorSpace = colorSpaces[i].colorSpace; |
| testScenario.pixelFormat = colorSpaces[i].pixelFormat; |
| testScenario.alpha = alphaValues[j]; |
| testScenario.colorSpaceConversion = colorSpaceConversions[k]; |
| testScenarios.push(testScenario); |
| } |
| |
| for (var i = 0; i < testScenarios.length; i++) |
| runTransferFromImageBitmapTest(testScenarios[i]); |
| } |
| |
| runAllTests(); |
| |
| </script> |
