1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/core/SkBlitBWMaskTemplate.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,128 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#include "SkBitmap.h"
1.14 +#include "SkMask.h"
1.15 +
1.16 +#ifndef ClearLow3Bits_DEFINED
1.17 +#define ClearLow3Bits_DEFINED
1.18 + #define ClearLow3Bits(x) ((unsigned)(x) >> 3 << 3)
1.19 +#endif
1.20 +
1.21 +/*
1.22 + SK_BLITBWMASK_NAME name of function(const SkBitmap& bitmap, const SkMask& mask, const SkIRect& clip, SK_BLITBWMASK_ARGS)
1.23 + SK_BLITBWMASK_ARGS list of additional arguments to SK_BLITBWMASK_NAME, beginning with a comma
1.24 + SK_BLITBWMASK_BLIT8 name of function(U8CPU byteMask, SK_BLITBWMASK_DEVTYPE* dst, int x, int y)
1.25 + SK_BLITBWMASK_GETADDR either getAddr32 or getAddr16 or getAddr8
1.26 + SK_BLITBWMASK_DEVTYPE either U32 or U16 or U8
1.27 +*/
1.28 +
1.29 +static void SK_BLITBWMASK_NAME(const SkBitmap& bitmap, const SkMask& srcMask, const SkIRect& clip SK_BLITBWMASK_ARGS)
1.30 +{
1.31 + SkASSERT(clip.fRight <= srcMask.fBounds.fRight);
1.32 +
1.33 + int cx = clip.fLeft;
1.34 + int cy = clip.fTop;
1.35 + int maskLeft = srcMask.fBounds.fLeft;
1.36 + unsigned mask_rowBytes = srcMask.fRowBytes;
1.37 + size_t bitmap_rowBytes = bitmap.rowBytes();
1.38 + unsigned height = clip.height();
1.39 +
1.40 + SkASSERT(mask_rowBytes != 0);
1.41 + SkASSERT(bitmap_rowBytes != 0);
1.42 + SkASSERT(height != 0);
1.43 +
1.44 + const uint8_t* bits = srcMask.getAddr1(cx, cy);
1.45 + SK_BLITBWMASK_DEVTYPE* device = bitmap.SK_BLITBWMASK_GETADDR(cx, cy);
1.46 +
1.47 + if (cx == maskLeft && clip.fRight == srcMask.fBounds.fRight)
1.48 + {
1.49 + do {
1.50 + SK_BLITBWMASK_DEVTYPE* dst = device;
1.51 + unsigned rb = mask_rowBytes;
1.52 + do {
1.53 + U8CPU mask = *bits++;
1.54 + SK_BLITBWMASK_BLIT8(mask, dst);
1.55 + dst += 8;
1.56 + } while (--rb != 0);
1.57 + device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes);
1.58 + } while (--height != 0);
1.59 + }
1.60 + else
1.61 + {
1.62 + int left_edge = cx - maskLeft;
1.63 + SkASSERT(left_edge >= 0);
1.64 + int rite_edge = clip.fRight - maskLeft;
1.65 + SkASSERT(rite_edge > left_edge);
1.66 +
1.67 + int left_mask = 0xFF >> (left_edge & 7);
1.68 + int rite_mask = 0xFF << (8 - (rite_edge & 7));
1.69 + rite_mask &= 0xFF; // only want low-8 bits of mask
1.70 + int full_runs = (rite_edge >> 3) - ((left_edge + 7) >> 3);
1.71 +
1.72 + // check for empty right mask, so we don't read off the end (or go slower than we need to)
1.73 + if (rite_mask == 0)
1.74 + {
1.75 + SkASSERT(full_runs >= 0);
1.76 + full_runs -= 1;
1.77 + rite_mask = 0xFF;
1.78 + }
1.79 + if (left_mask == 0xFF)
1.80 + full_runs -= 1;
1.81 +
1.82 + // back up manually so we can keep in sync with our byte-aligned src
1.83 + // and not trigger an assert from the getAddr## function
1.84 + device -= left_edge & 7;
1.85 +
1.86 + if (full_runs < 0)
1.87 + {
1.88 + left_mask &= rite_mask;
1.89 + SkASSERT(left_mask != 0);
1.90 + do {
1.91 + U8CPU mask = *bits & left_mask;
1.92 + SK_BLITBWMASK_BLIT8(mask, device);
1.93 + bits += mask_rowBytes;
1.94 + device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes);
1.95 + } while (--height != 0);
1.96 + }
1.97 + else
1.98 + {
1.99 + do {
1.100 + int runs = full_runs;
1.101 + SK_BLITBWMASK_DEVTYPE* dst = device;
1.102 + const uint8_t* b = bits;
1.103 + U8CPU mask;
1.104 +
1.105 + mask = *b++ & left_mask;
1.106 + SK_BLITBWMASK_BLIT8(mask, dst);
1.107 + dst += 8;
1.108 +
1.109 + while (--runs >= 0)
1.110 + {
1.111 + mask = *b++;
1.112 + SK_BLITBWMASK_BLIT8(mask, dst);
1.113 + dst += 8;
1.114 + }
1.115 +
1.116 + mask = *b & rite_mask;
1.117 + SK_BLITBWMASK_BLIT8(mask, dst);
1.118 +
1.119 + bits += mask_rowBytes;
1.120 + device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes);
1.121 + } while (--height != 0);
1.122 + }
1.123 + }
1.124 +}
1.125 +
1.126 +#undef SK_BLITBWMASK_NAME
1.127 +#undef SK_BLITBWMASK_ARGS
1.128 +#undef SK_BLITBWMASK_BLIT8
1.129 +#undef SK_BLITBWMASK_GETADDR
1.130 +#undef SK_BLITBWMASK_DEVTYPE
1.131 +#undef SK_BLITBWMASK_DOROWSETUP
