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00012 #ifndef BLITTER_32BPP_BASE_HPP
00013 #define BLITTER_32BPP_BASE_HPP
00014
00015 #include "base.hpp"
00016 #include "../core/bitmath_func.hpp"
00017 #include "../gfx_func.h"
00018
00020 class Blitter_32bppBase : public Blitter {
00021 public:
00022 uint8 GetScreenDepth() { return 32; }
00023 void *MoveTo(void *video, int x, int y);
00024 void SetPixel(void *video, int x, int y, uint8 colour);
00025 void DrawRect(void *video, int width, int height, uint8 colour);
00026 void CopyFromBuffer(void *video, const void *src, int width, int height);
00027 void CopyToBuffer(const void *video, void *dst, int width, int height);
00028 void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
00029 void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y);
00030 int BufferSize(int width, int height);
00031 void PaletteAnimate(uint start, uint count);
00032 Blitter::PaletteAnimation UsePaletteAnimation();
00033 int GetBytesPerPixel() { return 4; }
00034
00038 static inline uint32 ComposeColour(uint a, uint r, uint g, uint b)
00039 {
00040 return (((a) << 24) & 0xFF000000) | (((r) << 16) & 0x00FF0000) | (((g) << 8) & 0x0000FF00) | ((b) & 0x000000FF);
00041 }
00042
00046 static inline uint32 LookupColourInPalette(uint index)
00047 {
00048 return _cur_palette[index].data;
00049 }
00050
00054 static inline uint32 ComposeColourRGBANoCheck(uint r, uint g, uint b, uint a, uint32 current)
00055 {
00056 uint cr = GB(current, 16, 8);
00057 uint cg = GB(current, 8, 8);
00058 uint cb = GB(current, 0, 8);
00059
00060
00061 return ComposeColour(0xFF,
00062 ((int)(r - cr) * a) / 256 + cr,
00063 ((int)(g - cg) * a) / 256 + cg,
00064 ((int)(b - cb) * a) / 256 + cb);
00065 }
00066
00071 static inline uint32 ComposeColourRGBA(uint r, uint g, uint b, uint a, uint32 current)
00072 {
00073 if (a == 0) return current;
00074 if (a >= 255) return ComposeColour(0xFF, r, g, b);
00075
00076 return ComposeColourRGBANoCheck(r, g, b, a, current);
00077 }
00078
00082 static inline uint32 ComposeColourPANoCheck(uint32 colour, uint a, uint32 current)
00083 {
00084 uint r = GB(colour, 16, 8);
00085 uint g = GB(colour, 8, 8);
00086 uint b = GB(colour, 0, 8);
00087
00088 return ComposeColourRGBANoCheck(r, g, b, a, current);
00089 }
00090
00095 static inline uint32 ComposeColourPA(uint32 colour, uint a, uint32 current)
00096 {
00097 if (a == 0) return current;
00098 if (a >= 255) return (colour | 0xFF000000);
00099
00100 return ComposeColourPANoCheck(colour, a, current);
00101 }
00102
00110 static inline uint32 MakeTransparent(uint32 colour, uint nom, uint denom = 256)
00111 {
00112 uint r = GB(colour, 16, 8);
00113 uint g = GB(colour, 8, 8);
00114 uint b = GB(colour, 0, 8);
00115
00116 return ComposeColour(0xFF, r * nom / denom, g * nom / denom, b * nom / denom);
00117 }
00118
00124 static inline uint32 MakeGrey(uint32 colour)
00125 {
00126 uint r = GB(colour, 16, 8);
00127 uint g = GB(colour, 8, 8);
00128 uint b = GB(colour, 0, 8);
00129
00130
00131
00132
00133 colour = ((r * 19595) + (g * 38470) + (b * 7471)) / 65536;
00134
00135 return ComposeColour(0xFF, colour, colour, colour);
00136 }
00137 };
00138
00139 #endif