SwizzlerTest.cpp revision 7ecc59610de72043e9b7ebaf1ef45c43425e54fc 
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
14static const uint8_t kFillIndex = 0x11;
15static const uint8_t kFillGray = 0x22;
16static const uint16_t kFill565 = 0x3344;
17static const uint32_t kFillColor = 0x55667788;
18
19static 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
75DEF_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
130DEF_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
162DEF_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