1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/core/SkBlitRow.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,104 @@
1.4 +/*
1.5 + * Copyright 2011 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkBlitRow_DEFINED
1.12 +#define SkBlitRow_DEFINED
1.13 +
1.14 +#include "SkBitmap.h"
1.15 +#include "SkColor.h"
1.16 +
1.17 +class SkBlitRow {
1.18 +public:
1.19 + enum Flags16 {
1.20 + //! If set, the alpha parameter will be != 255
1.21 + kGlobalAlpha_Flag = 0x01,
1.22 + //! If set, the src colors may have alpha != 255
1.23 + kSrcPixelAlpha_Flag = 0x02,
1.24 + //! If set, the resulting 16bit colors should be dithered
1.25 + kDither_Flag = 0x04
1.26 + };
1.27 +
1.28 + /** Function pointer that reads a scanline of src SkPMColors, and writes
1.29 + a corresponding scanline of 16bit colors (specific format based on the
1.30 + config passed to the Factory.
1.31 +
1.32 + The x,y params are useful just for dithering
1.33 +
1.34 + @param alpha A global alpha to be applied to all of the src colors
1.35 + @param x The x coordinate of the beginning of the scanline
1.36 + @param y THe y coordinate of the scanline
1.37 + */
1.38 + typedef void (*Proc)(uint16_t* dst,
1.39 + const SkPMColor* src,
1.40 + int count, U8CPU alpha, int x, int y);
1.41 +
1.42 + static Proc Factory(unsigned flags, SkBitmap::Config);
1.43 +
1.44 + ///////////// D32 version
1.45 +
1.46 + enum Flags32 {
1.47 + kGlobalAlpha_Flag32 = 1 << 0,
1.48 + kSrcPixelAlpha_Flag32 = 1 << 1
1.49 + };
1.50 +
1.51 + /** Function pointer that blends 32bit colors onto a 32bit destination.
1.52 + @param dst array of dst 32bit colors
1.53 + @param src array of src 32bit colors (w/ or w/o alpha)
1.54 + @param count number of colors to blend
1.55 + @param alpha global alpha to be applied to all src colors
1.56 + */
1.57 + typedef void (*Proc32)(uint32_t* dst,
1.58 + const SkPMColor* src,
1.59 + int count, U8CPU alpha);
1.60 +
1.61 + static Proc32 Factory32(unsigned flags32);
1.62 +
1.63 + /** Function pointer that blends a single color with a row of 32-bit colors
1.64 + onto a 32-bit destination
1.65 + */
1.66 + typedef void (*ColorProc)(SkPMColor* dst, const SkPMColor* src, int count,
1.67 + SkPMColor color);
1.68 +
1.69 + /** Blend a single color onto a row of S32 pixels, writing the result
1.70 + into a row of D32 pixels. src and dst may be the same memory, but
1.71 + if they are not, they may not overlap.
1.72 + */
1.73 + static void Color32(SkPMColor dst[], const SkPMColor src[],
1.74 + int count, SkPMColor color);
1.75 +
1.76 + //! Public entry-point to return a blit function ptr
1.77 + static ColorProc ColorProcFactory();
1.78 +
1.79 + /** Function pointer that blends a single color onto a 32-bit rectangle. */
1.80 + typedef void (*ColorRectProc)(SkPMColor* dst, int width, int height,
1.81 + size_t rowBytes, SkPMColor color);
1.82 +
1.83 + /** Blend a single color into a rectangle of D32 pixels. */
1.84 + static void ColorRect32(SkPMColor* dst, int width, int height,
1.85 + size_t rowBytes, SkPMColor color);
1.86 +
1.87 + //! Public entry-point to return a blit function ptr
1.88 + static ColorRectProc ColorRectProcFactory();
1.89 +
1.90 + /** These static functions are called by the Factory and Factory32
1.91 + functions, and should return either NULL, or a
1.92 + platform-specific function-ptr to be used in place of the
1.93 + system default.
1.94 + */
1.95 +
1.96 + static Proc32 PlatformProcs32(unsigned flags);
1.97 + static Proc PlatformProcs565(unsigned flags);
1.98 + static ColorProc PlatformColorProc();
1.99 +
1.100 +private:
1.101 + enum {
1.102 + kFlags16_Mask = 7,
1.103 + kFlags32_Mask = 3
1.104 + };
1.105 +};
1.106 +
1.107 +#endif
