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      1 /*
      2  * Copyright 2011 Google Inc.
      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 
      8 #ifndef SkBlitMask_DEFINED
      9 #define SkBlitMask_DEFINED
     10 
     11 #include "SkBitmap.h"
     12 #include "SkColor.h"
     13 #include "SkMask.h"
     14 
     15 class SkBlitMask {
     16 public:
     17     /**
     18      *  Returns true if the device config and mask format were supported.
     19      *  else return false (nothing was drawn)
     20      */
     21     static bool BlitColor(const SkBitmap& device, const SkMask& mask,
     22                           const SkIRect& clip, SkColor color);
     23 
     24     /**
     25      *  Function pointer that blits the mask into a device (dst) colorized
     26      *  by color. The number of pixels to blit is specified by width and height,
     27      *  but each scanline is offset by dstRB (rowbytes) and srcRB respectively.
     28      */
     29     typedef void (*ColorProc)(void* dst, size_t dstRB,
     30                               const void* mask, size_t maskRB,
     31                               SkColor color, int width, int height);
     32 
     33     /**
     34      *  Function pointer that blits a row of mask(lcd16) into a row of dst
     35      *  colorized by a single color. The number of pixels to blit is specified
     36      *  by width.
     37      */
     38     typedef void (*BlitLCD16RowProc)(SkPMColor dst[], const uint16_t src[],
     39                                      SkColor color, int width,
     40                                      SkPMColor opaqueDst);
     41 
     42     /**
     43      *  Function pointer that blits a row of src colors through a row of a mask
     44      *  onto a row of dst colors. The RowFactory that returns this function ptr
     45      *  will have been told the formats for the mask and the dst.
     46      */
     47     typedef void (*RowProc)(void* dst, const void* mask,
     48                             const SkPMColor* src, int width);
     49 
     50     /**
     51      *  Public entry-point to return a blitmask ColorProc.
     52      *  May return NULL if config or format are not supported.
     53      */
     54     static ColorProc ColorFactory(SkBitmap::Config, SkMask::Format, SkColor);
     55 
     56     /**
     57      *  Return either platform specific optimized blitmask ColorProc,
     58      *  or NULL if no optimized routine is available.
     59      */
     60     static ColorProc PlatformColorProcs(SkBitmap::Config, SkMask::Format, SkColor);
     61 
     62     /**
     63      *  Public entry-point to return a blitcolor BlitLCD16RowProc.
     64      */
     65     static BlitLCD16RowProc BlitLCD16RowFactory(bool isOpaque);
     66 
     67     /**
     68      *  Return either platform specific optimized blitcolor BlitLCD16RowProc,
     69      *  or NULL if no optimized routine is available.
     70      */
     71     static BlitLCD16RowProc PlatformBlitRowProcs16(bool isOpaque);
     72 
     73     enum RowFlags {
     74         kSrcIsOpaque_RowFlag    = 1 << 0
     75     };
     76 
     77     /**
     78      *  Public entry-point to return a blitmask RowProc.
     79      *  May return NULL if config or format are not supported.
     80      */
     81     static RowProc RowFactory(SkBitmap::Config, SkMask::Format, RowFlags);
     82 
     83     /**
     84      *  Return either platform specific optimized blitmask RowProc,
     85      *  or NULL if no optimized routine is available.
     86      */
     87     static RowProc PlatformRowProcs(SkBitmap::Config, SkMask::Format, RowFlags);
     88 };
     89 
     90 #endif
     91