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gfx/skia/trunk/src/core/SkConfig8888.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkConfig8888.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Sat, 03 Jan 2015 20:18:00 +0100
branch
TOR_BUG_3246
changeset 7
129ffea94266
permissions
-rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

michael@0 1 #include "SkConfig8888.h"
michael@0 2 #include "SkMathPriv.h"
michael@0 3 #include "SkUnPreMultiply.h"
michael@0 4
michael@0 5 namespace {
michael@0 6
michael@0 7 template <int A_IDX, int R_IDX, int G_IDX, int B_IDX>
michael@0 8 inline uint32_t pack_config8888(uint32_t a, uint32_t r,
michael@0 9 uint32_t g, uint32_t b) {
michael@0 10 #ifdef SK_CPU_LENDIAN
michael@0 11 return (a << (A_IDX * 8)) | (r << (R_IDX * 8)) |
michael@0 12 (g << (G_IDX * 8)) | (b << (B_IDX * 8));
michael@0 13 #else
michael@0 14 return (a << ((3-A_IDX) * 8)) | (r << ((3-R_IDX) * 8)) |
michael@0 15 (g << ((3-G_IDX) * 8)) | (b << ((3-B_IDX) * 8));
michael@0 16 #endif
michael@0 17 }
michael@0 18
michael@0 19 template <int A_IDX, int R_IDX, int G_IDX, int B_IDX>
michael@0 20 inline void unpack_config8888(uint32_t color,
michael@0 21 uint32_t* a, uint32_t* r,
michael@0 22 uint32_t* g, uint32_t* b) {
michael@0 23 #ifdef SK_CPU_LENDIAN
michael@0 24 *a = (color >> (A_IDX * 8)) & 0xff;
michael@0 25 *r = (color >> (R_IDX * 8)) & 0xff;
michael@0 26 *g = (color >> (G_IDX * 8)) & 0xff;
michael@0 27 *b = (color >> (B_IDX * 8)) & 0xff;
michael@0 28 #else
michael@0 29 *a = (color >> ((3 - A_IDX) * 8)) & 0xff;
michael@0 30 *r = (color >> ((3 - R_IDX) * 8)) & 0xff;
michael@0 31 *g = (color >> ((3 - G_IDX) * 8)) & 0xff;
michael@0 32 *b = (color >> ((3 - B_IDX) * 8)) & 0xff;
michael@0 33 #endif
michael@0 34 }
michael@0 35
michael@0 36 #ifdef SK_CPU_LENDIAN
michael@0 37 static const int SK_NATIVE_A_IDX = SK_A32_SHIFT / 8;
michael@0 38 static const int SK_NATIVE_R_IDX = SK_R32_SHIFT / 8;
michael@0 39 static const int SK_NATIVE_G_IDX = SK_G32_SHIFT / 8;
michael@0 40 static const int SK_NATIVE_B_IDX = SK_B32_SHIFT / 8;
michael@0 41 #else
michael@0 42 static const int SK_NATIVE_A_IDX = 3 - (SK_A32_SHIFT / 8);
michael@0 43 static const int SK_NATIVE_R_IDX = 3 - (SK_R32_SHIFT / 8);
michael@0 44 static const int SK_NATIVE_G_IDX = 3 - (SK_G32_SHIFT / 8);
michael@0 45 static const int SK_NATIVE_B_IDX = 3 - (SK_B32_SHIFT / 8);
michael@0 46 #endif
michael@0 47
michael@0 48 /**
michael@0 49 * convert_pixel<OUT_CFG, IN_CFG converts a pixel value from one Config8888 to
michael@0 50 * another. It is implemented by first expanding OUT_CFG to r, g, b, a indices
michael@0 51 * and an is_premul bool as params to another template function. Then IN_CFG is
michael@0 52 * expanded via another function call.
michael@0 53 */
michael@0 54
michael@0 55 template <bool OUT_PM, int OUT_A_IDX, int OUT_R_IDX, int OUT_G_IDX, int OUT_B_IDX,
michael@0 56 bool IN_PM, int IN_A_IDX, int IN_R_IDX, int IN_G_IDX, int IN_B_IDX>
michael@0 57 inline uint32_t convert_pixel(uint32_t pixel) {
michael@0 58 uint32_t a, r, g, b;
michael@0 59 unpack_config8888<IN_A_IDX, IN_R_IDX, IN_G_IDX, IN_B_IDX>(pixel, &a, &r, &g, &b);
michael@0 60 if (IN_PM && !OUT_PM) {
michael@0 61 // Using SkUnPreMultiply::ApplyScale is faster than (value * 0xff) / a.
michael@0 62 if (a) {
michael@0 63 SkUnPreMultiply::Scale scale = SkUnPreMultiply::GetScale(a);
michael@0 64 r = SkUnPreMultiply::ApplyScale(scale, r);
michael@0 65 g = SkUnPreMultiply::ApplyScale(scale, g);
michael@0 66 b = SkUnPreMultiply::ApplyScale(scale, b);
michael@0 67 } else {
michael@0 68 return 0;
michael@0 69 }
michael@0 70 } else if (!IN_PM && OUT_PM) {
michael@0 71 // This matches SkUnPreMultiply conversion which we are replacing.
michael@0 72 r = SkMulDiv255Round(r, a);
michael@0 73 g = SkMulDiv255Round(g, a);
michael@0 74 b = SkMulDiv255Round(b, a);
michael@0 75 }
michael@0 76 return pack_config8888<OUT_A_IDX, OUT_R_IDX, OUT_G_IDX, OUT_B_IDX>(a, r, g, b);
michael@0 77 }
michael@0 78
michael@0 79 template <bool OUT_PM, int OUT_A_IDX, int OUT_R_IDX, int OUT_G_IDX, int OUT_B_IDX, SkCanvas::Config8888 IN_CFG>
michael@0 80 inline uint32_t convert_pixel(uint32_t pixel) {
michael@0 81 switch(IN_CFG) {
michael@0 82 case SkCanvas::kNative_Premul_Config8888:
michael@0 83 return convert_pixel<OUT_PM, OUT_A_IDX, OUT_R_IDX, OUT_G_IDX, OUT_B_IDX,
michael@0 84 true, SK_NATIVE_A_IDX, SK_NATIVE_R_IDX, SK_NATIVE_G_IDX, SK_NATIVE_B_IDX>(pixel);
michael@0 85 break;
michael@0 86 case SkCanvas::kNative_Unpremul_Config8888:
michael@0 87 return convert_pixel<OUT_PM, OUT_A_IDX, OUT_R_IDX, OUT_G_IDX, OUT_B_IDX,
michael@0 88 false, SK_NATIVE_A_IDX, SK_NATIVE_R_IDX, SK_NATIVE_G_IDX, SK_NATIVE_B_IDX>(pixel);
michael@0 89 break;
michael@0 90 case SkCanvas::kBGRA_Premul_Config8888:
michael@0 91 return convert_pixel<OUT_PM, OUT_A_IDX, OUT_R_IDX, OUT_G_IDX, OUT_B_IDX,
michael@0 92 true, 3, 2, 1, 0>(pixel);
michael@0 93 break;
michael@0 94 case SkCanvas::kBGRA_Unpremul_Config8888:
michael@0 95 return convert_pixel<OUT_PM, OUT_A_IDX, OUT_R_IDX, OUT_G_IDX, OUT_B_IDX,
michael@0 96 false, 3, 2, 1, 0>(pixel);
michael@0 97 break;
michael@0 98 case SkCanvas::kRGBA_Premul_Config8888:
michael@0 99 return convert_pixel<OUT_PM, OUT_A_IDX, OUT_R_IDX, OUT_G_IDX, OUT_B_IDX,
michael@0 100 true, 3, 0, 1, 2>(pixel);
michael@0 101 break;
michael@0 102 case SkCanvas::kRGBA_Unpremul_Config8888:
michael@0 103 return convert_pixel<OUT_PM, OUT_A_IDX, OUT_R_IDX, OUT_G_IDX, OUT_B_IDX,
michael@0 104 false, 3, 0, 1, 2>(pixel);
michael@0 105 break;
michael@0 106 default:
michael@0 107 SkDEBUGFAIL("Unexpected config8888");
michael@0 108 return 0;
michael@0 109 break;
michael@0 110 }
michael@0 111 }
michael@0 112
michael@0 113 template <SkCanvas::Config8888 OUT_CFG, SkCanvas::Config8888 IN_CFG>
michael@0 114 inline uint32_t convert_pixel(uint32_t pixel) {
michael@0 115 switch(OUT_CFG) {
michael@0 116 case SkCanvas::kNative_Premul_Config8888:
michael@0 117 return convert_pixel<true, SK_NATIVE_A_IDX, SK_NATIVE_R_IDX, SK_NATIVE_G_IDX, SK_NATIVE_B_IDX, IN_CFG>(pixel);
michael@0 118 break;
michael@0 119 case SkCanvas::kNative_Unpremul_Config8888:
michael@0 120 return convert_pixel<false, SK_NATIVE_A_IDX, SK_NATIVE_R_IDX, SK_NATIVE_G_IDX, SK_NATIVE_B_IDX, IN_CFG>(pixel);
michael@0 121 break;
michael@0 122 case SkCanvas::kBGRA_Premul_Config8888:
michael@0 123 return convert_pixel<true, 3, 2, 1, 0, IN_CFG>(pixel);
michael@0 124 break;
michael@0 125 case SkCanvas::kBGRA_Unpremul_Config8888:
michael@0 126 return convert_pixel<false, 3, 2, 1, 0, IN_CFG>(pixel);
michael@0 127 break;
michael@0 128 case SkCanvas::kRGBA_Premul_Config8888:
michael@0 129 return convert_pixel<true, 3, 0, 1, 2, IN_CFG>(pixel);
michael@0 130 break;
michael@0 131 case SkCanvas::kRGBA_Unpremul_Config8888:
michael@0 132 return convert_pixel<false, 3, 0, 1, 2, IN_CFG>(pixel);
michael@0 133 break;
michael@0 134 default:
michael@0 135 SkDEBUGFAIL("Unexpected config8888");
michael@0 136 return 0;
michael@0 137 break;
michael@0 138 }
michael@0 139 }
michael@0 140
michael@0 141 /**
michael@0 142 * SkConvertConfig8888Pixels has 6 * 6 possible combinations of src and dst
michael@0 143 * configs. Each is implemented as an instantiation templated function. Two
michael@0 144 * levels of switch statements are used to select the correct instantiation, one
michael@0 145 * for the src config and one for the dst config.
michael@0 146 */
michael@0 147
michael@0 148 template <SkCanvas::Config8888 DST_CFG, SkCanvas::Config8888 SRC_CFG>
michael@0 149 inline void convert_config8888(uint32_t* dstPixels,
michael@0 150 size_t dstRowBytes,
michael@0 151 const uint32_t* srcPixels,
michael@0 152 size_t srcRowBytes,
michael@0 153 int width,
michael@0 154 int height) {
michael@0 155 intptr_t dstPix = reinterpret_cast<intptr_t>(dstPixels);
michael@0 156 intptr_t srcPix = reinterpret_cast<intptr_t>(srcPixels);
michael@0 157
michael@0 158 for (int y = 0; y < height; ++y) {
michael@0 159 srcPixels = reinterpret_cast<const uint32_t*>(srcPix);
michael@0 160 dstPixels = reinterpret_cast<uint32_t*>(dstPix);
michael@0 161 for (int x = 0; x < width; ++x) {
michael@0 162 dstPixels[x] = convert_pixel<DST_CFG, SRC_CFG>(srcPixels[x]);
michael@0 163 }
michael@0 164 dstPix += dstRowBytes;
michael@0 165 srcPix += srcRowBytes;
michael@0 166 }
michael@0 167 }
michael@0 168
michael@0 169 template <SkCanvas::Config8888 SRC_CFG>
michael@0 170 inline void convert_config8888(uint32_t* dstPixels,
michael@0 171 size_t dstRowBytes,
michael@0 172 SkCanvas::Config8888 dstConfig,
michael@0 173 const uint32_t* srcPixels,
michael@0 174 size_t srcRowBytes,
michael@0 175 int width,
michael@0 176 int height) {
michael@0 177 switch(dstConfig) {
michael@0 178 case SkCanvas::kNative_Premul_Config8888:
michael@0 179 convert_config8888<SkCanvas::kNative_Premul_Config8888, SRC_CFG>(dstPixels, dstRowBytes, srcPixels, srcRowBytes, width, height);
michael@0 180 break;
michael@0 181 case SkCanvas::kNative_Unpremul_Config8888:
michael@0 182 convert_config8888<SkCanvas::kNative_Unpremul_Config8888, SRC_CFG>(dstPixels, dstRowBytes, srcPixels, srcRowBytes, width, height);
michael@0 183 break;
michael@0 184 case SkCanvas::kBGRA_Premul_Config8888:
michael@0 185 convert_config8888<SkCanvas::kBGRA_Premul_Config8888, SRC_CFG>(dstPixels, dstRowBytes, srcPixels, srcRowBytes, width, height);
michael@0 186 break;
michael@0 187 case SkCanvas::kBGRA_Unpremul_Config8888:
michael@0 188 convert_config8888<SkCanvas::kBGRA_Unpremul_Config8888, SRC_CFG>(dstPixels, dstRowBytes, srcPixels, srcRowBytes, width, height);
michael@0 189 break;
michael@0 190 case SkCanvas::kRGBA_Premul_Config8888:
michael@0 191 convert_config8888<SkCanvas::kRGBA_Premul_Config8888, SRC_CFG>(dstPixels, dstRowBytes, srcPixels, srcRowBytes, width, height);
michael@0 192 break;
michael@0 193 case SkCanvas::kRGBA_Unpremul_Config8888:
michael@0 194 convert_config8888<SkCanvas::kRGBA_Unpremul_Config8888, SRC_CFG>(dstPixels, dstRowBytes, srcPixels, srcRowBytes, width, height);
michael@0 195 break;
michael@0 196 default:
michael@0 197 SkDEBUGFAIL("Unexpected config8888");
michael@0 198 break;
michael@0 199 }
michael@0 200 }
michael@0 201
michael@0 202 }
michael@0 203
michael@0 204 void SkConvertConfig8888Pixels(uint32_t* dstPixels,
michael@0 205 size_t dstRowBytes,
michael@0 206 SkCanvas::Config8888 dstConfig,
michael@0 207 const uint32_t* srcPixels,
michael@0 208 size_t srcRowBytes,
michael@0 209 SkCanvas::Config8888 srcConfig,
michael@0 210 int width,
michael@0 211 int height) {
michael@0 212 if (srcConfig == dstConfig) {
michael@0 213 if (srcPixels == dstPixels) {
michael@0 214 return;
michael@0 215 }
michael@0 216 if (dstRowBytes == srcRowBytes &&
michael@0 217 4U * width == srcRowBytes) {
michael@0 218 memcpy(dstPixels, srcPixels, srcRowBytes * height);
michael@0 219 return;
michael@0 220 } else {
michael@0 221 intptr_t srcPix = reinterpret_cast<intptr_t>(srcPixels);
michael@0 222 intptr_t dstPix = reinterpret_cast<intptr_t>(dstPixels);
michael@0 223 for (int y = 0; y < height; ++y) {
michael@0 224 srcPixels = reinterpret_cast<const uint32_t*>(srcPix);
michael@0 225 dstPixels = reinterpret_cast<uint32_t*>(dstPix);
michael@0 226 memcpy(dstPixels, srcPixels, 4 * width);
michael@0 227 srcPix += srcRowBytes;
michael@0 228 dstPix += dstRowBytes;
michael@0 229 }
michael@0 230 return;
michael@0 231 }
michael@0 232 }
michael@0 233 switch(srcConfig) {
michael@0 234 case SkCanvas::kNative_Premul_Config8888:
michael@0 235 convert_config8888<SkCanvas::kNative_Premul_Config8888>(dstPixels, dstRowBytes, dstConfig, srcPixels, srcRowBytes, width, height);
michael@0 236 break;
michael@0 237 case SkCanvas::kNative_Unpremul_Config8888:
michael@0 238 convert_config8888<SkCanvas::kNative_Unpremul_Config8888>(dstPixels, dstRowBytes, dstConfig, srcPixels, srcRowBytes, width, height);
michael@0 239 break;
michael@0 240 case SkCanvas::kBGRA_Premul_Config8888:
michael@0 241 convert_config8888<SkCanvas::kBGRA_Premul_Config8888>(dstPixels, dstRowBytes, dstConfig, srcPixels, srcRowBytes, width, height);
michael@0 242 break;
michael@0 243 case SkCanvas::kBGRA_Unpremul_Config8888:
michael@0 244 convert_config8888<SkCanvas::kBGRA_Unpremul_Config8888>(dstPixels, dstRowBytes, dstConfig, srcPixels, srcRowBytes, width, height);
michael@0 245 break;
michael@0 246 case SkCanvas::kRGBA_Premul_Config8888:
michael@0 247 convert_config8888<SkCanvas::kRGBA_Premul_Config8888>(dstPixels, dstRowBytes, dstConfig, srcPixels, srcRowBytes, width, height);
michael@0 248 break;
michael@0 249 case SkCanvas::kRGBA_Unpremul_Config8888:
michael@0 250 convert_config8888<SkCanvas::kRGBA_Unpremul_Config8888>(dstPixels, dstRowBytes, dstConfig, srcPixels, srcRowBytes, width, height);
michael@0 251 break;
michael@0 252 default:
michael@0 253 SkDEBUGFAIL("Unexpected config8888");
michael@0 254 break;
michael@0 255 }
michael@0 256 }
michael@0 257
michael@0 258 uint32_t SkPackConfig8888(SkCanvas::Config8888 config,
michael@0 259 uint32_t a,
michael@0 260 uint32_t r,
michael@0 261 uint32_t g,
michael@0 262 uint32_t b) {
michael@0 263 switch (config) {
michael@0 264 case SkCanvas::kNative_Premul_Config8888:
michael@0 265 case SkCanvas::kNative_Unpremul_Config8888:
michael@0 266 return pack_config8888<SK_NATIVE_A_IDX,
michael@0 267 SK_NATIVE_R_IDX,
michael@0 268 SK_NATIVE_G_IDX,
michael@0 269 SK_NATIVE_B_IDX>(a, r, g, b);
michael@0 270 case SkCanvas::kBGRA_Premul_Config8888:
michael@0 271 case SkCanvas::kBGRA_Unpremul_Config8888:
michael@0 272 return pack_config8888<3, 2, 1, 0>(a, r, g, b);
michael@0 273 case SkCanvas::kRGBA_Premul_Config8888:
michael@0 274 case SkCanvas::kRGBA_Unpremul_Config8888:
michael@0 275 return pack_config8888<3, 0, 1, 2>(a, r, g, b);
michael@0 276 default:
michael@0 277 SkDEBUGFAIL("Unexpected config8888");
michael@0 278 return 0;
michael@0 279 }
michael@0 280 }

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