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