1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkSwizzle.h"
9 #include "SkSwizzler.h"
10 #include "Test.h"
11 #include "SkOpts.h"
12
13 // These are the values that we will look for to indicate that the fill was successful
14 static const uint8_t kFillIndex = 0x11;
15 static const uint8_t kFillGray = 0x22;
16 static const uint16_t kFill565 = 0x3344;
17 static const uint32_t kFillColor = 0x55667788;
18
check_fill(skiatest::Reporter * r,const SkImageInfo & imageInfo,uint32_t startRow,uint32_t endRow,size_t rowBytes,uint32_t offset,uint32_t colorOrIndex)19 static void check_fill(skiatest::Reporter* r,
20 const SkImageInfo& imageInfo,
21 uint32_t startRow,
22 uint32_t endRow,
23 size_t rowBytes,
24 uint32_t offset,
25 uint32_t colorOrIndex) {
26
27 // Calculate the total size of the image in bytes. Use the smallest possible size.
28 // The offset value tells us to adjust the pointer from the memory we allocate in order
29 // to test on different memory alignments. If offset is nonzero, we need to increase the
30 // size of the memory we allocate in order to make sure that we have enough. We are
31 // still allocating the smallest possible size.
32 const size_t totalBytes = imageInfo.getSafeSize(rowBytes) + offset;
33
34 // Create fake image data where every byte has a value of 0
35 std::unique_ptr<uint8_t[]> storage(new uint8_t[totalBytes]);
36 memset(storage.get(), 0, totalBytes);
37 // Adjust the pointer in order to test on different memory alignments
38 uint8_t* imageData = storage.get() + offset;
39 uint8_t* imageStart = imageData + rowBytes * startRow;
40 const SkImageInfo fillInfo = imageInfo.makeWH(imageInfo.width(), endRow - startRow + 1);
41 SkSampler::Fill(fillInfo, imageStart, rowBytes, colorOrIndex, SkCodec::kNo_ZeroInitialized);
42
43 // Ensure that the pixels are filled properly
44 // The bots should catch any memory corruption
45 uint8_t* indexPtr = imageData + startRow * rowBytes;
46 uint8_t* grayPtr = indexPtr;
47 uint32_t* colorPtr = (uint32_t*) indexPtr;
48 uint16_t* color565Ptr = (uint16_t*) indexPtr;
49 for (uint32_t y = startRow; y <= endRow; y++) {
50 for (int32_t x = 0; x < imageInfo.width(); x++) {
51 switch (imageInfo.colorType()) {
52 case kIndex_8_SkColorType:
53 REPORTER_ASSERT(r, kFillIndex == indexPtr[x]);
54 break;
55 case kN32_SkColorType:
56 REPORTER_ASSERT(r, kFillColor == colorPtr[x]);
57 break;
58 case kGray_8_SkColorType:
59 REPORTER_ASSERT(r, kFillGray == grayPtr[x]);
60 break;
61 case kRGB_565_SkColorType:
62 REPORTER_ASSERT(r, kFill565 == color565Ptr[x]);
63 break;
64 default:
65 REPORTER_ASSERT(r, false);
66 break;
67 }
68 }
69 indexPtr += rowBytes;
70 colorPtr = (uint32_t*) indexPtr;
71 }
72 }
73
74 // Test Fill() with different combinations of dimensions, alignment, and padding
DEF_TEST(SwizzlerFill,r)75 DEF_TEST(SwizzlerFill, r) {
76 // Test on an invalid width and representative widths
77 const uint32_t widths[] = { 0, 10, 50 };
78
79 // In order to call Fill(), there must be at least one row to fill
80 // Test on the smallest possible height and representative heights
81 const uint32_t heights[] = { 1, 5, 10 };
82
83 // Test on interesting possibilities for row padding
84 const uint32_t paddings[] = { 0, 4 };
85
86 // Iterate over test dimensions
87 for (uint32_t width : widths) {
88 for (uint32_t height : heights) {
89
90 // Create image info objects
91 const SkImageInfo colorInfo = SkImageInfo::MakeN32(width, height, kUnknown_SkAlphaType);
92 const SkImageInfo grayInfo = colorInfo.makeColorType(kGray_8_SkColorType);
93 const SkImageInfo indexInfo = colorInfo.makeColorType(kIndex_8_SkColorType);
94 const SkImageInfo color565Info = colorInfo.makeColorType(kRGB_565_SkColorType);
95
96 for (uint32_t padding : paddings) {
97
98 // Calculate row bytes
99 const size_t colorRowBytes = SkColorTypeBytesPerPixel(kN32_SkColorType) * width
100 + padding;
101 const size_t indexRowBytes = width + padding;
102 const size_t grayRowBytes = indexRowBytes;
103 const size_t color565RowBytes =
104 SkColorTypeBytesPerPixel(kRGB_565_SkColorType) * width + padding;
105
106 // If there is padding, we can invent an offset to change the memory alignment
107 for (uint32_t offset = 0; offset <= padding; offset += 4) {
108
109 // Test all possible start rows with all possible end rows
110 for (uint32_t startRow = 0; startRow < height; startRow++) {
111 for (uint32_t endRow = startRow; endRow < height; endRow++) {
112
113 // Test fill with each color type
114 check_fill(r, colorInfo, startRow, endRow, colorRowBytes, offset,
115 kFillColor);
116 check_fill(r, indexInfo, startRow, endRow, indexRowBytes, offset,
117 kFillIndex);
118 check_fill(r, grayInfo, startRow, endRow, grayRowBytes, offset,
119 kFillGray);
120 check_fill(r, color565Info, startRow, endRow, color565RowBytes, offset,
121 kFill565);
122 }
123 }
124 }
125 }
126 }
127 }
128 }
129
DEF_TEST(SwizzleOpts,r)130 DEF_TEST(SwizzleOpts, r) {
131 uint32_t dst, src;
132
133 // forall c, c*255 == c, c*0 == 0
134 for (int c = 0; c <= 255; c++) {
135 src = (255<<24) | c;
136 SkOpts::RGBA_to_rgbA(&dst, &src, 1);
137 REPORTER_ASSERT(r, dst == src);
138 SkOpts::RGBA_to_bgrA(&dst, &src, 1);
139 REPORTER_ASSERT(r, dst == (uint32_t)((255<<24) | (c<<16)));
140
141 src = (0<<24) | c;
142 SkOpts::RGBA_to_rgbA(&dst, &src, 1);
143 REPORTER_ASSERT(r, dst == 0);
144 SkOpts::RGBA_to_bgrA(&dst, &src, 1);
145 REPORTER_ASSERT(r, dst == 0);
146 }
147
148 // check a totally arbitrary color
149 src = 0xFACEB004;
150 SkOpts::RGBA_to_rgbA(&dst, &src, 1);
151 REPORTER_ASSERT(r, dst == 0xFACAAD04);
152
153 // swap red and blue
154 SkOpts::RGBA_to_BGRA(&dst, &src, 1);
155 REPORTER_ASSERT(r, dst == 0xFA04B0CE);
156
157 // all together now
158 SkOpts::RGBA_to_bgrA(&dst, &src, 1);
159 REPORTER_ASSERT(r, dst == 0xFA04ADCA);
160 }
161
DEF_TEST(PublicSwizzleOpts,r)162 DEF_TEST(PublicSwizzleOpts, r) {
163 uint32_t dst, src;
164
165 // check a totally arbitrary color
166 src = 0xFACEB004;
167 SkSwapRB(&dst, &src, 1);
168 REPORTER_ASSERT(r, dst == 0xFA04B0CE);
169 }
170