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| 1 /* libs/graphics/sgl/SkBlitBWMaskTemplate.h | |
| 2 ** | |
| 3 ** Copyright 2006, The Android Open Source Project | |
| 4 ** | |
| 5 ** Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 ** you may not use this file except in compliance with the License. | |
| 7 ** You may obtain a copy of the License at | |
| 8 ** | |
| 9 ** http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 ** | |
| 11 ** Unless required by applicable law or agreed to in writing, software | |
| 12 ** distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 ** See the License for the specific language governing permissions and | |
| 15 ** limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 #include "SkBitmap.h" | |
| 19 #include "SkMask.h" | |
| 20 | |
| 21 #ifndef ClearLow3Bits_DEFINED | |
| 22 #define ClearLow3Bits_DEFINED | |
| 23 #define ClearLow3Bits(x) ((unsigned)(x) >> 3 << 3) | |
| 24 #endif | |
| 25 | |
| 26 /* | |
| 27 SK_BLITBWMASK_NAME name of function(const SkBitmap& bitmap, const S
kMask& mask, const SkIRect& clip, SK_BLITBWMASK_ARGS) | |
| 28 SK_BLITBWMASK_ARGS list of additional arguments to SK_BLITBWMASK_NA
ME, beginning with a comma | |
| 29 SK_BLITBWMASK_BLIT8 name of function(U8CPU byteMask, SK_BLITBWMASK_D
EVTYPE* dst, int x, int y) | |
| 30 SK_BLITBWMASK_GETADDR either getAddr32 or getAddr16 or getAddr8 | |
| 31 SK_BLITBWMASK_DEVTYPE either U32 or U16 or U8 | |
| 32 */ | |
| 33 | |
| 34 static void SK_BLITBWMASK_NAME(const SkBitmap& bitmap, const SkMask& srcMask, co
nst SkIRect& clip SK_BLITBWMASK_ARGS) | |
| 35 { | |
| 36 SkASSERT(clip.fRight <= srcMask.fBounds.fRight); | |
| 37 | |
| 38 int cx = clip.fLeft; | |
| 39 int cy = clip.fTop; | |
| 40 int maskLeft = srcMask.fBounds.fLeft; | |
| 41 unsigned mask_rowBytes = srcMask.fRowBytes; | |
| 42 unsigned bitmap_rowBytes = bitmap.rowBytes(); | |
| 43 unsigned height = clip.height(); | |
| 44 | |
| 45 SkASSERT(mask_rowBytes != 0); | |
| 46 SkASSERT(bitmap_rowBytes != 0); | |
| 47 SkASSERT(height != 0); | |
| 48 | |
| 49 const uint8_t* bits = srcMask.getAddr1(cx, cy); | |
| 50 SK_BLITBWMASK_DEVTYPE* device = bitmap.SK_BLITBWMASK_GETADDR(cx, cy); | |
| 51 | |
| 52 if (cx == maskLeft && clip.fRight == srcMask.fBounds.fRight) | |
| 53 { | |
| 54 do { | |
| 55 SK_BLITBWMASK_DEVTYPE* dst = device; | |
| 56 unsigned rb = mask_rowBytes; | |
| 57 do { | |
| 58 U8CPU mask = *bits++; | |
| 59 SK_BLITBWMASK_BLIT8(mask, dst); | |
| 60 dst += 8; | |
| 61 } while (--rb != 0); | |
| 62 device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); | |
| 63 } while (--height != 0); | |
| 64 } | |
| 65 else | |
| 66 { | |
| 67 int left_edge = cx - maskLeft; | |
| 68 SkASSERT(left_edge >= 0); | |
| 69 int rite_edge = clip.fRight - maskLeft; | |
| 70 SkASSERT(rite_edge > left_edge); | |
| 71 | |
| 72 int left_mask = 0xFF >> (left_edge & 7); | |
| 73 int rite_mask = 0xFF << (8 - (rite_edge & 7)); | |
| 74 int full_runs = (rite_edge >> 3) - ((left_edge + 7) >> 3); | |
| 75 | |
| 76 // check for empty right mask, so we don't read off the end (or go slowe
r than we need to) | |
| 77 if (rite_mask == 0) | |
| 78 { | |
| 79 SkASSERT(full_runs >= 0); | |
| 80 full_runs -= 1; | |
| 81 rite_mask = 0xFF; | |
| 82 } | |
| 83 if (left_mask == 0xFF) | |
| 84 full_runs -= 1; | |
| 85 | |
| 86 // back up manually so we can keep in sync with our byte-aligned src | |
| 87 // and not trigger an assert from the getAddr## function | |
| 88 device -= left_edge & 7; | |
| 89 // have cx reflect our actual starting x-coord | |
| 90 cx -= left_edge & 7; | |
| 91 | |
| 92 if (full_runs < 0) | |
| 93 { | |
| 94 left_mask &= rite_mask; | |
| 95 SkASSERT(left_mask != 0); | |
| 96 do { | |
| 97 U8CPU mask = *bits & left_mask; | |
| 98 SK_BLITBWMASK_BLIT8(mask, device); | |
| 99 bits += mask_rowBytes; | |
| 100 device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowByte
s); | |
| 101 } while (--height != 0); | |
| 102 } | |
| 103 else | |
| 104 { | |
| 105 do { | |
| 106 int runs = full_runs; | |
| 107 SK_BLITBWMASK_DEVTYPE* dst = device; | |
| 108 const uint8_t* b = bits; | |
| 109 U8CPU mask; | |
| 110 | |
| 111 mask = *b++ & left_mask; | |
| 112 SK_BLITBWMASK_BLIT8(mask, dst); | |
| 113 dst += 8; | |
| 114 | |
| 115 while (--runs >= 0) | |
| 116 { | |
| 117 mask = *b++; | |
| 118 SK_BLITBWMASK_BLIT8(mask, dst); | |
| 119 dst += 8; | |
| 120 } | |
| 121 | |
| 122 mask = *b & rite_mask; | |
| 123 SK_BLITBWMASK_BLIT8(mask, dst); | |
| 124 | |
| 125 bits += mask_rowBytes; | |
| 126 device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowByte
s); | |
| 127 } while (--height != 0); | |
| 128 } | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 #undef SK_BLITBWMASK_NAME | |
| 133 #undef SK_BLITBWMASK_ARGS | |
| 134 #undef SK_BLITBWMASK_BLIT8 | |
| 135 #undef SK_BLITBWMASK_GETADDR | |
| 136 #undef SK_BLITBWMASK_DEVTYPE | |
| 137 #undef SK_BLITBWMASK_DOROWSETUP | |
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Chromium Code Reviews
Issue 113827:
Remove the remainder of the skia source code from the Chromium repo.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/