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comparison: gfx/skia/trunk/src/core/SkBlitBWMaskTemplate.h
gfx/skia/trunk/src/core/SkBlitBWMaskTemplate.h
- branch
- TOR_BUG_9701
- changeset 9
- a63d609f5ebe
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| -1:000000000000 | 0:b8528b4156e5 |
|---|---|
| 1 | |
| 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 */ | |
| 8 | |
| 9 | |
| 10 #include "SkBitmap.h" | |
| 11 #include "SkMask.h" | |
| 12 | |
| 13 #ifndef ClearLow3Bits_DEFINED | |
| 14 #define ClearLow3Bits_DEFINED | |
| 15 #define ClearLow3Bits(x) ((unsigned)(x) >> 3 << 3) | |
| 16 #endif | |
| 17 | |
| 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 */ | |
| 25 | |
| 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); | |
| 29 | |
| 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(); | |
| 36 | |
| 37 SkASSERT(mask_rowBytes != 0); | |
| 38 SkASSERT(bitmap_rowBytes != 0); | |
| 39 SkASSERT(height != 0); | |
| 40 | |
| 41 const uint8_t* bits = srcMask.getAddr1(cx, cy); | |
| 42 SK_BLITBWMASK_DEVTYPE* device = bitmap.SK_BLITBWMASK_GETADDR(cx, cy); | |
| 43 | |
| 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); | |
| 63 | |
| 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); | |
| 68 | |
| 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; | |
| 78 | |
| 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; | |
| 82 | |
| 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; | |
| 101 | |
| 102 mask = *b++ & left_mask; | |
| 103 SK_BLITBWMASK_BLIT8(mask, dst); | |
| 104 dst += 8; | |
| 105 | |
| 106 while (--runs >= 0) | |
| 107 { | |
| 108 mask = *b++; | |
| 109 SK_BLITBWMASK_BLIT8(mask, dst); | |
| 110 dst += 8; | |
| 111 } | |
| 112 | |
| 113 mask = *b & rite_mask; | |
| 114 SK_BLITBWMASK_BLIT8(mask, dst); | |
| 115 | |
| 116 bits += mask_rowBytes; | |
| 117 device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); | |
| 118 } while (--height != 0); | |
| 119 } | |
| 120 } | |
| 121 } | |
| 122 | |
| 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 |
