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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 "../core/math_func.hpp"
00018 #include "../gfx_func.h"
00019 #include "../debug.h"
00020 #include <math.h>
00021
00022 extern int _sat, _li;
00023
00024 class Blitter_32bppBase : public Blitter {
00025 public:
00026 uint8 GetScreenDepth() { return 32; }
00027
00028
00029
00030 void *MoveTo(const void *video, int x, int y);
00031 void SetPixel(void *video, int x, int y, uint8 colour);
00032 void DrawRect(void *video, int width, int height, uint8 colour);
00033 void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour);
00034 void CopyFromBuffer(void *video, const void *src, int width, int height);
00035 void CopyToBuffer(const void *video, void *dst, int width, int height);
00036 void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch);
00037 void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y);
00038 int BufferSize(int width, int height);
00039 void PaletteAnimate(uint start, uint count);
00040 Blitter::PaletteAnimation UsePaletteAnimation();
00041 int GetBytesPerPixel() { return 4; }
00042
00046 static inline uint32 ComposeColour(uint a, uint r, uint g, uint b)
00047 {
00048 return (((a) << 24) & 0xFF000000) | (((r) << 16) & 0x00FF0000) | (((g) << 8) & 0x0000FF00) | ((b) & 0x000000FF);
00049 }
00050
00054 static inline uint32 LookupColourInPalette(uint index)
00055 {
00056 return _cur_palette[index].data;
00057 }
00058
00062 static inline uint32 ComposeColourRGBANoCheck(uint r, uint g, uint b, uint a, uint32 current)
00063 {
00064 uint cr = GB(current, 16, 8);
00065 uint cg = GB(current, 8, 8);
00066 uint cb = GB(current, 0, 8);
00067
00068
00069 return ComposeColour(0xFF,
00070 ((int)(r - cr) * a) / 256 + cr,
00071 ((int)(g - cg) * a) / 256 + cg,
00072 ((int)(b - cb) * a) / 256 + cb);
00073 }
00074
00079 static inline uint32 ComposeColourRGBA(uint r, uint g, uint b, uint a, uint32 current)
00080 {
00081 if (a == 0) return current;
00082 if (a >= 255) return ComposeColour(0xFF, r, g, b);
00083
00084 return ComposeColourRGBANoCheck(r, g, b, a, current);
00085 }
00086
00090 static inline uint32 ComposeColourPANoCheck(uint32 colour, uint a, uint32 current)
00091 {
00092 uint r = GB(colour, 16, 8);
00093 uint g = GB(colour, 8, 8);
00094 uint b = GB(colour, 0, 8);
00095
00096 return ComposeColourRGBANoCheck(r, g, b, a, current);
00097 }
00098
00103 static inline uint32 ComposeColourPA(uint32 colour, uint a, uint32 current)
00104 {
00105 if (a == 0) return current;
00106 if (a >= 255) return (colour | 0xFF000000);
00107
00108 return ComposeColourPANoCheck(colour, a, current);
00109 }
00110
00114 static inline uint ComposeColourBlend(uint colour, uint32 current)
00115 {
00116 if (colour == current) return colour;
00117
00118
00119
00120
00121 int r_colour = GB(colour, 16, 8);
00122 int g_colour = GB(colour, 8, 8);
00123 int b_colour = GB(colour, 0, 8);
00124 int hue = 0;
00125 int saturation = 0;
00126 int lightness_colour = 0;
00127
00128
00129 int min_colour = min(min(r_colour, g_colour),b_colour);
00130
00131 if ((r_colour > g_colour) && (r_colour > b_colour)) {
00132 if (min_colour != r_colour) {
00133 hue = 60 * (g_colour - b_colour) / (r_colour - min_colour) + 360;
00134 hue %= 360;
00135 if ((r_colour + min_colour) <= 256) {
00136 saturation = (r_colour - min_colour) * 255 / (r_colour + min_colour);
00137 } else {
00138 saturation = (r_colour - min_colour) * 255 / (512 - (r_colour + min_colour));
00139 }
00140 } else {
00141 saturation = 0;
00142 lightness_colour = r_colour;
00143 }
00144 } else if (g_colour > b_colour){
00145 if (min_colour != g_colour) {
00146 hue = 60 * (b_colour - r_colour) / (g_colour - min_colour) + 120;
00147 if ((g_colour + min_colour) <= 256) {
00148 saturation = (g_colour - min_colour) * 255 / (g_colour + min_colour);
00149 } else {
00150 saturation = (g_colour - min_colour) * 255 / (512 - (g_colour + min_colour));
00151 }
00152 } else {
00153 saturation = 0;
00154 lightness_colour = g_colour;
00155 }
00156 } else {
00157 if (min_colour != b_colour) {
00158 hue = 60 * (r_colour - g_colour) / (b_colour - min_colour) + 240;
00159 if ((b_colour + min_colour) <= 256) {
00160 saturation = (b_colour - min_colour) * 255 / (b_colour + min_colour);
00161 } else {
00162 saturation = (b_colour - min_colour) * 255 / (512 - (b_colour + min_colour));
00163 }
00164 } else {
00165 saturation = 0;
00166 lightness_colour = b_colour;
00167 }
00168 }
00169
00170
00171 int r_current = GB(current, 16, 8);
00172 int g_current = GB(current, 8, 8);
00173 int b_current = GB(current, 0, 8);
00174
00175 int min_current = min(min(r_current, g_current),b_current);
00176 int max_current = max(max(r_current, g_current),b_current);
00177
00178
00179 int lightness_current = (max_current + min_current) / 2;
00180
00181
00182 unsigned int red, green, blue;
00183
00184 if (saturation == 0) {
00185 red = (lightness_colour + lightness_current) / 2;
00186 green = red;
00187 blue = red;
00188 } else {
00189 float q;
00190 if (lightness_current < 128) {
00191 q = lightness_current * (1 + saturation / 255.0);
00192 } else {
00193 q = lightness_current + saturation - (lightness_current * saturation / 255.0);
00194 }
00195
00196 float p = (2 * lightness_current) - q;
00197
00198
00199 int hue_r = hue + 120;
00200 if (hue_r > 360) {
00201 hue_r -= 360;
00202 }
00203 if (hue_r < 60) {
00204 red = p + ((q - p) * hue_r / 60.0);
00205 } else if (hue_r < 180){
00206 red = q;
00207 } else if (hue_r < 240) {
00208 red = p + ((q - p) * (4.0 - hue_r / 60.0));
00209 } else {
00210 red = p;
00211 }
00212
00213
00214 int hue_g = hue;
00215
00216 if (hue_g < 60) {
00217 green = p + ((q - p) * hue_g / 60.0);
00218 } else if (hue_g < 180){
00219 green = q;
00220 } else if (hue_g < 240) {
00221 green = p + ((q - p) * (4.0 - hue_g / 60.0));
00222 } else {
00223 green = p;
00224 }
00225
00226
00227 int hue_b = hue - 120;
00228 if (hue_b < 0.0) {
00229 hue_b += 360;
00230 }
00231 if (hue_b < 60) {
00232 blue = p + ((q - p) * hue_b / 60.0);
00233 } else if (hue_b < 180){
00234 blue = q;
00235 } else if (hue_b < 240) {
00236 blue = p + ((q - p) * (4.0 - hue_b / 60.0));
00237 } else {
00238 blue = p;
00239 }
00240 }
00241
00242 return ComposeColour(0xff, red, green, blue);
00243 }
00244
00252 static inline uint32 MakeTransparent(uint32 colour, uint nom, uint denom = 256)
00253 {
00254 uint r = GB(colour, 16, 8);
00255 uint g = GB(colour, 8, 8);
00256 uint b = GB(colour, 0, 8);
00257
00258 return ComposeColour(0xFF, r * nom / denom, g * nom / denom, b * nom / denom);
00259 }
00260
00266 static inline uint32 MakeGrey(uint32 colour)
00267 {
00268 uint r = GB(colour, 16, 8);
00269 uint g = GB(colour, 8, 8);
00270 uint b = GB(colour, 0, 8);
00271
00272
00273
00274
00275 colour = ((r * 19595) + (g * 38470) + (b * 7471)) / 65536;
00276
00277 return ComposeColour(0xFF, colour, colour, colour);
00278 }
00279 };
00280
00281 #endif