epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 8 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 9 | #include "include/core/SkBitmap.h" |
| 10 | #include "src/core/SkMask.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 11 | |
| 12 | #ifndef ClearLow3Bits_DEFINED |
| 13 | #define ClearLow3Bits_DEFINED |
| 14 | #define ClearLow3Bits(x) ((unsigned)(x) >> 3 << 3) |
| 15 | #endif |
| 16 | |
| 17 | /* |
| 18 | SK_BLITBWMASK_NAME name of function(const SkBitmap& bitmap, const SkMask& mask, const SkIRect& clip, SK_BLITBWMASK_ARGS) |
| 19 | SK_BLITBWMASK_ARGS list of additional arguments to SK_BLITBWMASK_NAME, beginning with a comma |
| 20 | SK_BLITBWMASK_BLIT8 name of function(U8CPU byteMask, SK_BLITBWMASK_DEVTYPE* dst, int x, int y) |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 21 | SK_BLITBWMASK_GETADDR either writable_addr[8,16,32] |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 22 | SK_BLITBWMASK_DEVTYPE either U32 or U16 or U8 |
| 23 | */ |
| 24 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 25 | static void SK_BLITBWMASK_NAME(const SkPixmap& dst, const SkMask& srcMask, |
| 26 | const SkIRect& clip SK_BLITBWMASK_ARGS) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 27 | SkASSERT(clip.fRight <= srcMask.fBounds.fRight); |
| 28 | |
| 29 | int cx = clip.fLeft; |
| 30 | int cy = clip.fTop; |
| 31 | int maskLeft = srcMask.fBounds.fLeft; |
| 32 | unsigned mask_rowBytes = srcMask.fRowBytes; |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 33 | size_t bitmap_rowBytes = dst.rowBytes(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 34 | unsigned height = clip.height(); |
| 35 | |
| 36 | SkASSERT(mask_rowBytes != 0); |
| 37 | SkASSERT(bitmap_rowBytes != 0); |
| 38 | SkASSERT(height != 0); |
| 39 | |
| 40 | const uint8_t* bits = srcMask.getAddr1(cx, cy); |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 41 | SK_BLITBWMASK_DEVTYPE* device = dst.SK_BLITBWMASK_GETADDR(cx, cy); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 42 | |
| 43 | if (cx == maskLeft && clip.fRight == srcMask.fBounds.fRight) |
| 44 | { |
| 45 | do { |
| 46 | SK_BLITBWMASK_DEVTYPE* dst = device; |
| 47 | unsigned rb = mask_rowBytes; |
| 48 | do { |
| 49 | U8CPU mask = *bits++; |
| 50 | SK_BLITBWMASK_BLIT8(mask, dst); |
| 51 | dst += 8; |
| 52 | } while (--rb != 0); |
| 53 | device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); |
| 54 | } while (--height != 0); |
| 55 | } |
| 56 | else |
| 57 | { |
| 58 | int left_edge = cx - maskLeft; |
| 59 | SkASSERT(left_edge >= 0); |
| 60 | int rite_edge = clip.fRight - maskLeft; |
| 61 | SkASSERT(rite_edge > left_edge); |
| 62 | |
| 63 | int left_mask = 0xFF >> (left_edge & 7); |
| 64 | int rite_mask = 0xFF << (8 - (rite_edge & 7)); |
reed@google.com | b368551 | 2013-03-27 15:08:23 +0000 | [diff] [blame] | 65 | rite_mask &= 0xFF; // only want low-8 bits of mask |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 66 | int full_runs = (rite_edge >> 3) - ((left_edge + 7) >> 3); |
| 67 | |
| 68 | // check for empty right mask, so we don't read off the end (or go slower than we need to) |
| 69 | if (rite_mask == 0) |
| 70 | { |
| 71 | SkASSERT(full_runs >= 0); |
| 72 | full_runs -= 1; |
| 73 | rite_mask = 0xFF; |
| 74 | } |
| 75 | if (left_mask == 0xFF) |
| 76 | full_runs -= 1; |
| 77 | |
| 78 | // back up manually so we can keep in sync with our byte-aligned src |
| 79 | // and not trigger an assert from the getAddr## function |
| 80 | device -= left_edge & 7; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 81 | |
| 82 | if (full_runs < 0) |
| 83 | { |
| 84 | left_mask &= rite_mask; |
| 85 | SkASSERT(left_mask != 0); |
| 86 | do { |
| 87 | U8CPU mask = *bits & left_mask; |
| 88 | SK_BLITBWMASK_BLIT8(mask, device); |
| 89 | bits += mask_rowBytes; |
| 90 | device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); |
| 91 | } while (--height != 0); |
| 92 | } |
| 93 | else |
| 94 | { |
| 95 | do { |
| 96 | int runs = full_runs; |
| 97 | SK_BLITBWMASK_DEVTYPE* dst = device; |
| 98 | const uint8_t* b = bits; |
| 99 | U8CPU mask; |
| 100 | |
| 101 | mask = *b++ & left_mask; |
| 102 | SK_BLITBWMASK_BLIT8(mask, dst); |
| 103 | dst += 8; |
| 104 | |
| 105 | while (--runs >= 0) |
| 106 | { |
| 107 | mask = *b++; |
| 108 | SK_BLITBWMASK_BLIT8(mask, dst); |
| 109 | dst += 8; |
| 110 | } |
| 111 | |
| 112 | mask = *b & rite_mask; |
| 113 | SK_BLITBWMASK_BLIT8(mask, dst); |
| 114 | |
| 115 | bits += mask_rowBytes; |
| 116 | device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); |
| 117 | } while (--height != 0); |
| 118 | } |
| 119 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 120 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 121 | |
| 122 | #undef SK_BLITBWMASK_NAME |
| 123 | #undef SK_BLITBWMASK_ARGS |
| 124 | #undef SK_BLITBWMASK_BLIT8 |
| 125 | #undef SK_BLITBWMASK_GETADDR |
| 126 | #undef SK_BLITBWMASK_DEVTYPE |
| 127 | #undef SK_BLITBWMASK_DOROWSETUP |