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