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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
00019 class Blitter_32bppBase : public Blitter {
00020 public:
00021 uint8 GetScreenDepth() { return 32; }
00022
00023
00024
00025 void *MoveTo(const void *video, int x, int y);
00026 void SetPixel(void *video, int x, int y, uint8 colour);
00027 void DrawRect(void *video, int width, int height, uint8 colour);
00028 void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour);
00029 void CopyFromBuffer(void *video, const void *src, int width, int height);
00030 void CopyToBuffer(const void *video, void *dst, int width, int height);
00031 void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
00032 void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y);
00033 int BufferSize(int width, int height);
00034 void PaletteAnimate(uint start, uint count);
00035 Blitter::PaletteAnimation UsePaletteAnimation();
00036 int GetBytesPerPixel() { return 4; }
00037
00041 static inline uint32 ComposeColour(uint a, uint r, uint g, uint b)
00042 {
00043 return (((a) << 24) & 0xFF000000) | (((r) << 16) & 0x00FF0000) | (((g) << 8) & 0x0000FF00) | ((b) & 0x000000FF);
00044 }
00045
00049 static inline uint32 LookupColourInPalette(uint index)
00050 {
00051 return _cur_palette[index].data;
00052 }
00053
00057 static inline uint32 ComposeColourRGBANoCheck(uint r, uint g, uint b, uint a, uint32 current)
00058 {
00059 uint cr = GB(current, 16, 8);
00060 uint cg = GB(current, 8, 8);
00061 uint cb = GB(current, 0, 8);
00062
00063
00064 return ComposeColour(0xFF,
00065 ((int)(r - cr) * a) / 256 + cr,
00066 ((int)(g - cg) * a) / 256 + cg,
00067 ((int)(b - cb) * a) / 256 + cb);
00068 }
00069
00074 static inline uint32 ComposeColourRGBA(uint r, uint g, uint b, uint a, uint32 current)
00075 {
00076 if (a == 0) return current;
00077 if (a >= 255) return ComposeColour(0xFF, r, g, b);
00078
00079 return ComposeColourRGBANoCheck(r, g, b, a, current);
00080 }
00081
00085 static inline uint32 ComposeColourPANoCheck(uint32 colour, uint a, uint32 current)
00086 {
00087 uint r = GB(colour, 16, 8);
00088 uint g = GB(colour, 8, 8);
00089 uint b = GB(colour, 0, 8);
00090
00091 return ComposeColourRGBANoCheck(r, g, b, a, current);
00092 }
00093
00098 static inline uint32 ComposeColourPA(uint32 colour, uint a, uint32 current)
00099 {
00100 if (a == 0) return current;
00101 if (a >= 255) return (colour | 0xFF000000);
00102
00103 return ComposeColourPANoCheck(colour, a, current);
00104 }
00105
00113 static inline uint32 MakeTransparent(uint32 colour, uint nom, uint denom = 256)
00114 {
00115 uint r = GB(colour, 16, 8);
00116 uint g = GB(colour, 8, 8);
00117 uint b = GB(colour, 0, 8);
00118
00119 return ComposeColour(0xFF, r * nom / denom, g * nom / denom, b * nom / denom);
00120 }
00121
00127 static inline uint32 MakeGrey(uint32 colour)
00128 {
00129 uint r = GB(colour, 16, 8);
00130 uint g = GB(colour, 8, 8);
00131 uint b = GB(colour, 0, 8);
00132
00133
00134
00135
00136 colour = ((r * 19595) + (g * 38470) + (b * 7471)) / 65536;
00137
00138 return ComposeColour(0xFF, colour, colour, colour);
00139 }
00140 };
00141
00142 #endif