f0f4e9abba
on some gccs). git-svn-id: http://skia.googlecode.com/svn/trunk@425 2bbb7eff-a529-9590-31e7-b0007b416f81
86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
#ifndef SkBlitRow_DEFINED
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#define SkBlitRow_DEFINED
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#include "SkBitmap.h"
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#include "SkColor.h"
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class SkBlitRow {
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public:
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enum Flags16 {
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//! If set, the alpha parameter will be != 255
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kGlobalAlpha_Flag = 0x01,
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//! If set, the src colors may have alpha != 255
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kSrcPixelAlpha_Flag = 0x02,
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//! If set, the resulting 16bit colors should be dithered
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kDither_Flag = 0x04
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};
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/** Function pointer that reads a scanline of src SkPMColors, and writes
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a corresponding scanline of 16bit colors (specific format based on the
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config passed to the Factory.
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The x,y params are useful just for dithering
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@param alpha A global alpha to be applied to all of the src colors
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@param x The x coordinate of the beginning of the scanline
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@param y THe y coordinate of the scanline
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*/
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typedef void (*Proc)(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src,
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int count, U8CPU alpha, int x, int y);
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//! Public entry-point to return a blit function ptr
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static Proc Factory(unsigned flags, SkBitmap::Config);
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///////////// D32 version
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enum Flags32 {
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kGlobalAlpha_Flag32 = 1 << 0,
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kSrcPixelAlpha_Flag32 = 1 << 1,
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};
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/** Function pointer that blends 32bit colors onto a 32bit destination.
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@param dst array of dst 32bit colors
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@param src array of src 32bit colors (w/ or w/o alpha)
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@param count number of colors to blend
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@param alpha global alpha to be applied to all src colors
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*/
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typedef void (*Proc32)(uint32_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src,
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int count, U8CPU alpha);
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static Proc32 Factory32(unsigned flags32);
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/** Blend a single color onto a row of S32 pixels, writing the result
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into a row of D32 pixels. src and dst may be the same memory, but
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if they are not, they may not overlap.
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*/
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static void Color32(SkPMColor dst[], const SkPMColor src[], int count,
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SkPMColor color);
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/** Blend a single color onto a row of 32bit pixels, writing the result
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into the same row.
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*/
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static void Color32(SkPMColor row[], int count, SkPMColor color) {
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Color32(row, row, count, color);
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}
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/** These static functions are called by the Factory and Factory32
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functions, and should return either NULL, or a
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platform-specific function-ptr to be used in place of the
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system default.
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*/
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static Proc32 PlatformProcs32(unsigned flags);
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static Proc PlatformProcs565(unsigned flags);
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static Proc PlatformProcs4444(unsigned flags);
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private:
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enum {
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kFlags16_Mask = 7,
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kFlags32_Mask = 3
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};
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};
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#endif
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