00001
00002
00005 #ifndef BLITTER_32BPP_BASE_HPP
00006 #define BLITTER_32BPP_BASE_HPP
00007
00008 #include "base.hpp"
00009 #include "../core/bitmath_func.hpp"
00010
00011 class Blitter_32bppBase : public Blitter {
00012 public:
00013 uint8 GetScreenDepth() { return 32; }
00014
00015
00016
00017 void *MoveTo(const void *video, int x, int y);
00018 void SetPixel(void *video, int x, int y, uint8 colour);
00019 void SetPixelIfEmpty(void *video, int x, int y, uint8 colour);
00020 void DrawRect(void *video, int width, int height, uint8 colour);
00021 void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour);
00022 void CopyFromBuffer(void *video, const void *src, int width, int height);
00023 void CopyToBuffer(const void *video, void *dst, int width, int height);
00024 void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
00025 void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y);
00026 int BufferSize(int width, int height);
00027 void PaletteAnimate(uint start, uint count);
00028 Blitter::PaletteAnimation UsePaletteAnimation();
00029 int GetBytesPerPixel() { return 4; }
00030
00034 static inline uint32 ComposeColour(uint a, uint r, uint g, uint b)
00035 {
00036 return (((a) << 24) & 0xFF000000) | (((r) << 16) & 0x00FF0000) | (((g) << 8) & 0x0000FF00) | ((b) & 0x000000FF);
00037 }
00038
00042 static inline uint32 LookupColourInPalette(uint index)
00043 {
00044 return _cur_palette[index];
00045 }
00046
00050 static inline uint32 ComposeColourRGBANoCheck(uint r, uint g, uint b, uint a, uint32 current)
00051 {
00052 uint cr = GB(current, 16, 8);
00053 uint cg = GB(current, 8, 8);
00054 uint cb = GB(current, 0, 8);
00055
00056
00057 return ComposeColour(0xFF,
00058 ((int)(r - cr) * a) / 256 + cr,
00059 ((int)(g - cg) * a) / 256 + cg,
00060 ((int)(b - cb) * a) / 256 + cb);
00061 }
00062
00067 static inline uint32 ComposeColourRGBA(uint r, uint g, uint b, uint a, uint32 current)
00068 {
00069 if (a == 0) return current;
00070 if (a >= 255) return ComposeColour(0xFF, r, g, b);
00071
00072 return ComposeColourRGBANoCheck(r, g, b, a, current);
00073 }
00074
00078 static inline uint32 ComposeColourPANoCheck(uint32 colour, uint a, uint32 current)
00079 {
00080 uint r = GB(colour, 16, 8);
00081 uint g = GB(colour, 8, 8);
00082 uint b = GB(colour, 0, 8);
00083
00084 return ComposeColourRGBANoCheck(r, g, b, a, current);
00085 }
00086
00091 static inline uint32 ComposeColourPA(uint32 colour, uint a, uint32 current)
00092 {
00093 if (a == 0) return current;
00094 if (a >= 255) return (colour | 0xFF000000);
00095
00096 return ComposeColourPANoCheck(colour, a, current);
00097 }
00098
00106 static inline uint32 MakeTransparent(uint32 colour, uint nom, uint denom = 256)
00107 {
00108 uint r = GB(colour, 16, 8);
00109 uint g = GB(colour, 8, 8);
00110 uint b = GB(colour, 0, 8);
00111
00112 return ComposeColour(0xFF, r * nom / denom, g * nom / denom, b * nom / denom);
00113 }
00114
00120 static inline uint32 MakeGrey(uint32 colour)
00121 {
00122 uint r = GB(colour, 16, 8);
00123 uint g = GB(colour, 8, 8);
00124 uint b = GB(colour, 0, 8);
00125
00126
00127
00128
00129 colour = ((r * 19595) + (g * 38470) + (b * 7471)) / 65536;
00130
00131 return ComposeColour(0xFF, colour, colour, colour);
00132 }
00133 };
00134
00135 #endif