| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "include/core/SkBitmap.h" |
| #include "src/core/SkMask.h" |
| |
| #ifndef ClearLow3Bits_DEFINED |
| #define ClearLow3Bits_DEFINED |
| #define ClearLow3Bits(x) ((unsigned)(x) >> 3 << 3) |
| #endif |
| |
| /* |
| SK_BLITBWMASK_NAME name of function(const SkBitmap& bitmap, const SkMask& mask, const SkIRect& clip, SK_BLITBWMASK_ARGS) |
| SK_BLITBWMASK_ARGS list of additional arguments to SK_BLITBWMASK_NAME, beginning with a comma |
| SK_BLITBWMASK_BLIT8 name of function(U8CPU byteMask, SK_BLITBWMASK_DEVTYPE* dst, int x, int y) |
| SK_BLITBWMASK_GETADDR either writable_addr[8,16,32] |
| SK_BLITBWMASK_DEVTYPE either U32 or U16 or U8 |
| */ |
| |
| static void SK_BLITBWMASK_NAME(const SkPixmap& dst, const SkMask& srcMask, |
| const SkIRect& clip SK_BLITBWMASK_ARGS) { |
| SkASSERT(clip.fRight <= srcMask.fBounds.fRight); |
| |
| int cx = clip.fLeft; |
| int cy = clip.fTop; |
| int maskLeft = srcMask.fBounds.fLeft; |
| unsigned mask_rowBytes = srcMask.fRowBytes; |
| size_t bitmap_rowBytes = dst.rowBytes(); |
| unsigned height = clip.height(); |
| |
| SkASSERT(mask_rowBytes != 0); |
| SkASSERT(bitmap_rowBytes != 0); |
| SkASSERT(height != 0); |
| |
| const uint8_t* bits = srcMask.getAddr1(cx, cy); |
| SK_BLITBWMASK_DEVTYPE* device = dst.SK_BLITBWMASK_GETADDR(cx, cy); |
| |
| if (cx == maskLeft && clip.fRight == srcMask.fBounds.fRight) |
| { |
| do { |
| SK_BLITBWMASK_DEVTYPE* dst = device; |
| unsigned rb = mask_rowBytes; |
| do { |
| U8CPU mask = *bits++; |
| SK_BLITBWMASK_BLIT8(mask, dst); |
| dst += 8; |
| } while (--rb != 0); |
| device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); |
| } while (--height != 0); |
| } |
| else |
| { |
| int left_edge = cx - maskLeft; |
| SkASSERT(left_edge >= 0); |
| int rite_edge = clip.fRight - maskLeft; |
| SkASSERT(rite_edge > left_edge); |
| |
| int left_mask = 0xFF >> (left_edge & 7); |
| int rite_mask = 0xFF << (8 - (rite_edge & 7)); |
| rite_mask &= 0xFF; // only want low-8 bits of mask |
| int full_runs = (rite_edge >> 3) - ((left_edge + 7) >> 3); |
| |
| // check for empty right mask, so we don't read off the end (or go slower than we need to) |
| if (rite_mask == 0) |
| { |
| SkASSERT(full_runs >= 0); |
| full_runs -= 1; |
| rite_mask = 0xFF; |
| } |
| if (left_mask == 0xFF) |
| full_runs -= 1; |
| |
| // back up manually so we can keep in sync with our byte-aligned src |
| // and not trigger an assert from the getAddr## function |
| device -= left_edge & 7; |
| |
| if (full_runs < 0) |
| { |
| left_mask &= rite_mask; |
| SkASSERT(left_mask != 0); |
| do { |
| U8CPU mask = *bits & left_mask; |
| SK_BLITBWMASK_BLIT8(mask, device); |
| bits += mask_rowBytes; |
| device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); |
| } while (--height != 0); |
| } |
| else |
| { |
| do { |
| int runs = full_runs; |
| SK_BLITBWMASK_DEVTYPE* dst = device; |
| const uint8_t* b = bits; |
| U8CPU mask; |
| |
| mask = *b++ & left_mask; |
| SK_BLITBWMASK_BLIT8(mask, dst); |
| dst += 8; |
| |
| while (--runs >= 0) |
| { |
| mask = *b++; |
| SK_BLITBWMASK_BLIT8(mask, dst); |
| dst += 8; |
| } |
| |
| mask = *b & rite_mask; |
| SK_BLITBWMASK_BLIT8(mask, dst); |
| |
| bits += mask_rowBytes; |
| device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); |
| } while (--height != 0); |
| } |
| } |
| } |
| |
| #undef SK_BLITBWMASK_NAME |
| #undef SK_BLITBWMASK_ARGS |
| #undef SK_BLITBWMASK_BLIT8 |
| #undef SK_BLITBWMASK_GETADDR |
| #undef SK_BLITBWMASK_DEVTYPE |
| #undef SK_BLITBWMASK_DOROWSETUP |