The Tor Browser: gfx/skia/trunk/src/core/SkBlitBWMaskTemplate.h@129ffea94266

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.

     2 /*

     3  * Copyright 2006 The Android Open Source Project

     4  *

     5  * Use of this source code is governed by a BSD-style license that can be

     6  * found in the LICENSE file.

     7  */

    10 #include "SkBitmap.h"

    11 #include "SkMask.h"

    13 #ifndef ClearLow3Bits_DEFINED

    14 #define ClearLow3Bits_DEFINED

    15     #define ClearLow3Bits(x)    ((unsigned)(x) >> 3 << 3)

    16 #endif

    18 /*

    19     SK_BLITBWMASK_NAME          name of function(const SkBitmap& bitmap, const SkMask& mask, const SkIRect& clip, SK_BLITBWMASK_ARGS)

    20     SK_BLITBWMASK_ARGS          list of additional arguments to SK_BLITBWMASK_NAME, beginning with a comma

    21     SK_BLITBWMASK_BLIT8         name of function(U8CPU byteMask, SK_BLITBWMASK_DEVTYPE* dst, int x, int y)

    22     SK_BLITBWMASK_GETADDR       either getAddr32 or getAddr16 or getAddr8

    23     SK_BLITBWMASK_DEVTYPE       either U32 or U16 or U8

    24 */

    26 static void SK_BLITBWMASK_NAME(const SkBitmap& bitmap, const SkMask& srcMask, const SkIRect& clip SK_BLITBWMASK_ARGS)

    27 {

    28     SkASSERT(clip.fRight <= srcMask.fBounds.fRight);

    30     int cx = clip.fLeft;

    31     int cy = clip.fTop;

    32     int maskLeft = srcMask.fBounds.fLeft;

    33     unsigned mask_rowBytes = srcMask.fRowBytes;

    34     size_t bitmap_rowBytes = bitmap.rowBytes();

    35     unsigned height = clip.height();

    37     SkASSERT(mask_rowBytes != 0);

    38     SkASSERT(bitmap_rowBytes != 0);

    39     SkASSERT(height != 0);

    41     const uint8_t* bits = srcMask.getAddr1(cx, cy);

    42     SK_BLITBWMASK_DEVTYPE* device = bitmap.SK_BLITBWMASK_GETADDR(cx, cy);

    44     if (cx == maskLeft && clip.fRight == srcMask.fBounds.fRight)

    45     {

    46         do {

    47             SK_BLITBWMASK_DEVTYPE* dst = device;

    48             unsigned rb = mask_rowBytes;

    49             do {

    50                 U8CPU mask = *bits++;

    51                 SK_BLITBWMASK_BLIT8(mask, dst);

    52                 dst += 8;

    53             } while (--rb != 0);

    54             device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes);

    55         } while (--height != 0);

    56     }

    57     else

    58     {

    59         int left_edge = cx - maskLeft;

    60         SkASSERT(left_edge >= 0);

    61         int rite_edge = clip.fRight - maskLeft;

    62         SkASSERT(rite_edge > left_edge);

    64         int left_mask = 0xFF >> (left_edge & 7);

    65         int rite_mask = 0xFF << (8 - (rite_edge & 7));

    66         rite_mask &= 0xFF;  // only want low-8 bits of mask

    67         int full_runs = (rite_edge >> 3) - ((left_edge + 7) >> 3);

    69         // check for empty right mask, so we don't read off the end (or go slower than we need to)

    70         if (rite_mask == 0)

    71         {

    72             SkASSERT(full_runs >= 0);

    73             full_runs -= 1;

    74             rite_mask = 0xFF;

    75         }

    76         if (left_mask == 0xFF)

    77             full_runs -= 1;

    79         // back up manually so we can keep in sync with our byte-aligned src

    80         // and not trigger an assert from the getAddr## function

    81         device -= left_edge & 7;

    83         if (full_runs < 0)

    84         {

    85             left_mask &= rite_mask;

    86             SkASSERT(left_mask != 0);

    87             do {

    88                 U8CPU mask = *bits & left_mask;

    89                 SK_BLITBWMASK_BLIT8(mask, device);

    90                 bits += mask_rowBytes;

    91                 device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes);

    92             } while (--height != 0);

    93         }

    94         else

    95         {

    96             do {

    97                 int runs = full_runs;

    98                 SK_BLITBWMASK_DEVTYPE* dst = device;

    99                 const uint8_t* b = bits;

   100                 U8CPU   mask;

   102                 mask = *b++ & left_mask;

   103                 SK_BLITBWMASK_BLIT8(mask, dst);

   104                 dst += 8;

   106                 while (--runs >= 0)

   107                 {

   108                     mask = *b++;

   109                     SK_BLITBWMASK_BLIT8(mask, dst);

   110                     dst += 8;

   111                 }

   113                 mask = *b & rite_mask;

   114                 SK_BLITBWMASK_BLIT8(mask, dst);

   116                 bits += mask_rowBytes;

   117                 device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes);

   118             } while (--height != 0);

   119         }

   120     }

   121 }

   123 #undef SK_BLITBWMASK_NAME

   124 #undef SK_BLITBWMASK_ARGS

   125 #undef SK_BLITBWMASK_BLIT8

   126 #undef SK_BLITBWMASK_GETADDR

   127 #undef SK_BLITBWMASK_DEVTYPE

   128 #undef SK_BLITBWMASK_DOROWSETUP

The Tor Browser / file revision

gfx/skia/trunk/src/core/SkBlitBWMaskTemplate.h@129ffea94266

gfx/skia/trunk/src/core/SkBlitBWMaskTemplate.h