def testDiff(self):
file_bmp = image_util.FromPngFile(test_png_path)
file_bmp_2 = image_util.FromPngFile(test_png_2_path)
diff_bmp = image_util.Diff(file_bmp, file_bmp)
self.assertEquals(2, image_util.Width(diff_bmp))
self.assertEquals(2, image_util.Height(diff_bmp))
image_util.GetPixelColor(diff_bmp, 0, 0).AssertIsRGB(0, 0, 0)
image_util.GetPixelColor(diff_bmp, 1, 1).AssertIsRGB(0, 0, 0)
image_util.GetPixelColor(diff_bmp, 0, 1).AssertIsRGB(0, 0, 0)
image_util.GetPixelColor(diff_bmp, 1, 0).AssertIsRGB(0, 0, 0)
diff_bmp = image_util.Diff(file_bmp, file_bmp_2)
self.assertEquals(3, image_util.Width(diff_bmp))
self.assertEquals(3, image_util.Height(diff_bmp))
image_util.GetPixelColor(diff_bmp, 0, 0).AssertIsRGB(0, 255, 255)
image_util.GetPixelColor(diff_bmp, 1, 1).AssertIsRGB(255, 0, 255)
image_util.GetPixelColor(diff_bmp, 0, 1).AssertIsRGB(255, 255, 0)
image_util.GetPixelColor(diff_bmp, 1, 0).AssertIsRGB(0, 0, 255)
image_util.GetPixelColor(diff_bmp, 0, 2).AssertIsRGB(255, 255, 255)
image_util.GetPixelColor(diff_bmp, 1, 2).AssertIsRGB(255, 255, 255)
image_util.GetPixelColor(diff_bmp, 2, 0).AssertIsRGB(255, 255, 255)
image_util.GetPixelColor(diff_bmp, 2, 1).AssertIsRGB(255, 255, 255)
image_util.GetPixelColor(diff_bmp, 2, 2).AssertIsRGB(255, 255, 255)
def testReadFromPngFile(self):
file_bmp = image_util.FromPngFile(test_png_path)
self.assertEquals(2, image_util.Width(file_bmp))
self.assertEquals(2, image_util.Height(file_bmp))
image_util.GetPixelColor(file_bmp, 0, 0).AssertIsRGB(255, 0, 0)
image_util.GetPixelColor(file_bmp, 1, 1).AssertIsRGB(0, 255, 0)
image_util.GetPixelColor(file_bmp, 0, 1).AssertIsRGB(0, 0, 255)
image_util.GetPixelColor(file_bmp, 1, 0).AssertIsRGB(255, 255, 0)
def testReadFromBase64Png(self):
bmp = image_util.FromBase64Png(test_png)
self.assertEquals(2, image_util.Width(bmp))
self.assertEquals(2, image_util.Height(bmp))
image_util.GetPixelColor(bmp, 0, 0).AssertIsRGB(255, 0, 0)
image_util.GetPixelColor(bmp, 1, 1).AssertIsRGB(0, 255, 0)
image_util.GetPixelColor(bmp, 0, 1).AssertIsRGB(0, 0, 255)
image_util.GetPixelColor(bmp, 1, 0).AssertIsRGB(255, 255, 0)
def testCrop(self):
pixels = [0, 0, 0, 1, 0, 0, 2, 0, 0, 3, 0, 0,
0, 1, 0, 1, 1, 0, 2, 1, 0, 3, 1, 0,
0, 2, 0, 1, 2, 0, 2, 2, 0, 3, 2, 0]
bmp = image_util.FromRGBPixels(4, 3, pixels)
bmp = image_util.Crop(bmp, 1, 2, 2, 1)
self.assertEquals(2, image_util.Width(bmp))
self.assertEquals(1, image_util.Height(bmp))
image_util.GetPixelColor(bmp, 0, 0).AssertIsRGB(1, 2, 0)
image_util.GetPixelColor(bmp, 1, 0).AssertIsRGB(2, 2, 0)
self.assertEquals(image_util.Pixels(bmp), bytearray([1, 2, 0, 2, 2, 0]))
def _CompareScreenshotSamples(screenshot, expectations, device_pixel_ratio):
for expectation in expectations:
location = expectation["location"]
x = int(location[0] * device_pixel_ratio)
y = int(location[1] * device_pixel_ratio)
if (x < 0 or y < 0 or x > image_util.Width(screenshot)
or y > image_util.Height(screenshot)):
raise page_test.Failure(
'Expected pixel location [%d, %d] is out of range on [%d, %d] image'
% (x, y, image_util.Width(screenshot),
image_util.Height(screenshot)))
actual_color = image_util.GetPixelColor(screenshot, x, y)
expected_color = rgba_color.RgbaColor(expectation["color"][0],
expectation["color"][1],
expectation["color"][2])
if not actual_color.IsEqual(expected_color, expectation["tolerance"]):
raise page_test.Failure('Expected pixel at ' + str(location) +
' to be ' + str(expectation["color"]) +
" but got [" + str(actual_color.r) + ", " +
str(actual_color.g) + ", " +
str(actual_color.b) + "]")
def testHistogram(self):
pixels = [1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3,
1, 2, 3, 8, 7, 6, 5, 4, 6, 1, 2, 3,
1, 2, 3, 8, 7, 6, 5, 4, 6, 1, 2, 3]
bmp = image_util.FromRGBPixels(4, 3, pixels)
bmp = image_util.Crop(bmp, 1, 1, 2, 2)
hist = image_util.GetColorHistogram(bmp)
for i in xrange(3):
self.assertEquals(sum(hist[i]),
image_util.Width(bmp) * image_util.Height(bmp))
self.assertEquals(hist.r[1], 0)
self.assertEquals(hist.r[5], 2)
self.assertEquals(hist.r[8], 2)
self.assertEquals(hist.g[2], 0)
self.assertEquals(hist.g[4], 2)
self.assertEquals(hist.g[7], 2)
self.assertEquals(hist.b[3], 0)
self.assertEquals(hist.b[6], 4)
