1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ui/gfx/image/image_util.h"
6
7 #include <vector>
8
9 #include "base/memory/scoped_ptr.h"
10 #include "testing/gtest/include/gtest/gtest.h"
11 #include "third_party/skia/include/core/SkBitmap.h"
12 #include "third_party/skia/include/core/SkRect.h"
13 #include "ui/gfx/image/image_skia.h"
14 #include "ui/gfx/image/image_unittest_util.h"
15
TEST(ImageUtilTest,JPEGEncodeAndDecode)16 TEST(ImageUtilTest, JPEGEncodeAndDecode) {
17 gfx::Image original = gfx::test::CreateImage(100, 100);
18
19 std::vector<unsigned char> encoded;
20 ASSERT_TRUE(gfx::JPEG1xEncodedDataFromImage(original, 80, &encoded));
21
22 gfx::Image decoded =
23 gfx::ImageFrom1xJPEGEncodedData(&encoded.front(), encoded.size());
24
25 // JPEG is lossy, so simply check that the image decoded successfully.
26 EXPECT_FALSE(decoded.IsEmpty());
27 }
28
TEST(ImageUtilTest,TestVisibleMargins)29 TEST(ImageUtilTest, TestVisibleMargins) {
30 // Image with non-transparent piece should return margins at those
31 // columns.
32 SkBitmap bitmap1;
33 bitmap1.allocN32Pixels(16, 16);
34 bitmap1.eraseColor(SK_ColorTRANSPARENT);
35 bitmap1.eraseArea(SkIRect::MakeLTRB(3, 3, 14, 14), SK_ColorYELLOW);
36 gfx::ImageSkia img = gfx::ImageSkia::CreateFrom1xBitmap(bitmap1);
37 int x = 0;
38 int y = 0;
39 gfx::VisibleMargins(img, &x, &y);
40 EXPECT_EQ(3, x);
41 EXPECT_EQ(13, y);
42 EXPECT_EQ(16, img.width());
43
44 // Full-width-transparent image should return margins in the center
45 // of the image.
46 SkBitmap bitmap2;
47 bitmap2.allocN32Pixels(16, 16);
48 bitmap2.eraseColor(SK_ColorTRANSPARENT);
49 gfx::ImageSkia img_transparent = gfx::ImageSkia::CreateFrom1xBitmap(bitmap2);
50 x = 0;
51 y = 0;
52 gfx::VisibleMargins(img_transparent, &x, &y);
53 EXPECT_EQ(8, x);
54 EXPECT_EQ(9, y);
55 EXPECT_EQ(16, img_transparent.width());
56
57 // Image with non-transparent piece that is skewed to one side should
58 // return margins at those columns.
59 SkBitmap bitmap3;
60 bitmap3.allocN32Pixels(16, 16);
61 bitmap3.eraseColor(SK_ColorTRANSPARENT);
62 bitmap3.eraseArea(SkIRect::MakeLTRB(3, 3, 5, 5), SK_ColorYELLOW);
63 gfx::ImageSkia img3 = gfx::ImageSkia::CreateFrom1xBitmap(bitmap3);
64 x = 0;
65 y = 0;
66 gfx::VisibleMargins(img3, &x, &y);
67 EXPECT_EQ(3, x);
68 EXPECT_EQ(4, y);
69 EXPECT_EQ(16, img3.width());
70
71 // Image with non-transparent piece that is at one edge should
72 // return margins at those columns.
73 SkBitmap bitmap4;
74 bitmap4.allocN32Pixels(16, 16);
75 bitmap4.eraseColor(SK_ColorTRANSPARENT);
76 bitmap4.eraseArea(SkIRect::MakeLTRB(0, 3, 5, 5), SK_ColorYELLOW);
77 gfx::ImageSkia img4 = gfx::ImageSkia::CreateFrom1xBitmap(bitmap4);
78 x = 0;
79 y = 0;
80 gfx::VisibleMargins(img4, &x, &y);
81 EXPECT_EQ(0, x);
82 EXPECT_EQ(4, y);
83 EXPECT_EQ(16, img4.width());
84
85 // Image with non-transparent piece that is at trailing edge should
86 // return margins at those columns.
87 SkBitmap bitmap5;
88 bitmap5.allocN32Pixels(16, 16);
89 bitmap5.eraseColor(SK_ColorTRANSPARENT);
90 bitmap5.eraseArea(SkIRect::MakeLTRB(4, 3, 16, 16), SK_ColorYELLOW);
91 gfx::ImageSkia img5 = gfx::ImageSkia::CreateFrom1xBitmap(bitmap5);
92 x = 0;
93 y = 0;
94 gfx::VisibleMargins(img5, &x, &y);
95 EXPECT_EQ(4, x);
96 EXPECT_EQ(15, y);
97 EXPECT_EQ(16, img5.width());
98 }
99