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Stratagus
2.2.6
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_________ __ __ / _____// |_____________ _/ |______ ____ __ __ ______ \_____ \\ __\_ __ \__ \\ __\__ \ / ___\| | \/ ___/ / \| | | | \// __ \| | / __ \_/ /_/ > | /\___ \ /_______ /|__| |__| (____ /__| (____ /\___ /|____//____ > \/ \/ \//_____/ \/ ______________________ ______________________ T H E W A R B E G I N S Stratagus - A free fantasy real time strategy game engine
00001 /* _______ __ __ __ ______ __ __ _______ __ __ 00002 * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\ 00003 * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / / 00004 * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / / 00005 * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / / 00006 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ / 00007 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/ 00008 * 00009 * Copyright (c) 2004, 2005 darkbits Js_./ 00010 * Per Larsson a.k.a finalman _RqZ{a<^_aa 00011 * Olof Naessén a.k.a jansem/yakslem _asww7!uY`> )\a// 00012 * _Qhm`] _f "'c 1!5m 00013 * Visit: http://guichan.darkbits.org )Qk<P ` _: :+' .' "{[ 00014 * .)j(] .d_/ '-( P . S 00015 * License: (BSD) <Td/Z <fP"5(\"??"\a. .L 00016 * Redistribution and use in source and _dV>ws?a-?' ._/L #' 00017 * binary forms, with or without )4d[#7r, . ' )d`)[ 00018 * modification, are permitted provided _Q-5'5W..j/?' -?!\)cam' 00019 * that the following conditions are met: j<<WP+k/);. _W=j f 00020 * 1. Redistributions of source code must .$%w\/]Q . ."' . mj$ 00021 * retain the above copyright notice, ]E.pYY(Q]>. a J@\ 00022 * this list of conditions and the j(]1u<sE"L,. . ./^ ]{a 00023 * following disclaimer. 4'_uomm\. )L);-4 (3= 00024 * 2. Redistributions in binary form must )_]X{Z('a_"a7'<a"a, ]"[ 00025 * reproduce the above copyright notice, #}<]m7`Za??4,P-"'7. ).m 00026 * this list of conditions and the ]d2e)Q(<Q( ?94 b- LQ/ 00027 * following disclaimer in the <B!</]C)d_, '(<' .f. =C+m 00028 * documentation and/or other materials .Z!=J ]e []('-4f _ ) -.)m]' 00029 * provided with the distribution. .w[5]' _[ /.)_-"+? _/ <W" 00030 * 3. Neither the name of Guichan nor the :$we` _! + _/ . j? 00031 * names of its contributors may be used =3)= _f (_yQmWW$#( " 00032 * to endorse or promote products derived - W, sQQQQmZQ#Wwa].. 00033 * from this software without specific (js, \[QQW$QWW#?!V"". 00034 * prior written permission. ]y:.<\.. . 00035 * -]n w/ ' [. 00036 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT )/ )/ ! 00037 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY < (; sac , ' 00038 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, ]^ .- % 00039 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF c < r 00040 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR aga< <La 00041 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 5% )P'-3L 00042 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR _bQf` y`..)a 00043 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ,J?4P'.P"_(\?d'., 00044 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES _Pa,)!f/<[]/ ?" 00045 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT _2-..:. .r+_,.. . 00046 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ?a.<%"' " -'.a_ _, 00047 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ^ 00048 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 00049 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00050 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 00051 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 00052 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00053 */ 00054 00055 #ifndef GCN_SDLPIXEL_HPP 00056 #define GCN_SDLPIXEL_HPP 00057 00058 #include "SDL.h" 00059 00060 #include "guichan/color.h" 00061 00062 namespace gcn 00063 { 00064 00073 inline const Color SDLgetPixel(SDL_Surface* surface, int x, int y) 00074 { 00075 int bpp = surface->format->BytesPerPixel; 00076 00077 SDL_LockSurface(surface); 00078 00079 Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp; 00080 00081 unsigned int color = 0; 00082 00083 switch(bpp) 00084 { 00085 case 1: 00086 color = *p; 00087 break; 00088 00089 case 2: 00090 color = *(Uint16 *)p; 00091 break; 00092 00093 case 3: 00094 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) 00095 { 00096 color = p[0] << 16 | p[1] << 8 | p[2]; 00097 } 00098 else 00099 { 00100 color = p[0] | p[1] << 8 | p[2] << 16; 00101 } 00102 break; 00103 00104 case 4: 00105 color = *(Uint32 *)p; 00106 break; 00107 00108 } 00109 00110 Uint8 r,g,b,a; 00111 00112 SDL_GetRGBA(color, surface->format, &r, &g, &b, &a); 00113 SDL_UnlockSurface(surface); 00114 00115 return Color(r,g,b,a); 00116 } 00117 00126 inline void SDLputPixel(SDL_Surface* surface, int x, int y, const Color& color) 00127 { 00128 int bpp = surface->format->BytesPerPixel; 00129 00130 SDL_LockSurface(surface); 00131 00132 Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp; 00133 00134 Uint32 pixel = SDL_MapRGB(surface->format, color.r, color.g, color.b); 00135 00136 switch(bpp) 00137 { 00138 case 1: 00139 *p = pixel; 00140 break; 00141 00142 case 2: 00143 *(Uint16 *)p = pixel; 00144 break; 00145 00146 case 3: 00147 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) 00148 { 00149 p[0] = (pixel >> 16) & 0xff; 00150 p[1] = (pixel >> 8) & 0xff; 00151 p[2] = pixel & 0xff; 00152 } 00153 else 00154 { 00155 p[0] = pixel & 0xff; 00156 p[1] = (pixel >> 8) & 0xff; 00157 p[2] = (pixel >> 16) & 0xff; 00158 } 00159 break; 00160 00161 case 4: 00162 *(Uint32 *)p = pixel; 00163 break; 00164 } 00165 00166 SDL_UnlockSurface(surface); 00167 } 00168 00176 inline unsigned int SDLAlpha16(unsigned int src, unsigned int dst, unsigned char a) 00177 { 00178 // Loses precision for speed 00179 a = (255 - a) >> 3; 00180 00181 src = (((src << 16) | src) & 0x07E0F81F); 00182 dst = ((dst << 16) | dst) & 0x07E0F81F; 00183 dst = ((((dst - src) * a) >> 5) + src) & 0x07E0F81F; 00184 return (dst >> 16) | dst; 00185 } 00186 00194 inline unsigned int SDLAlpha32(unsigned int src, unsigned int dst, unsigned char a) 00195 { 00196 a = 255 - a; 00197 00198 unsigned int src2 = (src & 0xFF00FF00) >> 8; 00199 src &= 0x00FF00FF; 00200 00201 unsigned int dst2 = (dst & 0xFF00FF00) >> 8; 00202 dst &= 0x00FF00FF; 00203 00204 dst = ((((dst - src) * a) >> 8) + src) & 0x00FF00FF; 00205 dst2 = ((((dst2 - src2) * a) >> 8) + src2) & 0x00FF00FF; 00206 return dst | (dst2 << 8); 00207 } 00208 00217 inline void SDLputPixelAlpha(SDL_Surface* surface, int x, int y, const Color& color) 00218 { 00219 int bpp = surface->format->BytesPerPixel; 00220 00221 SDL_LockSurface(surface); 00222 00223 Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp; 00224 00225 Uint32 pixel = SDL_MapRGB(surface->format, color.r, color.g, color.b); 00226 00227 switch(bpp) 00228 { 00229 case 1: 00230 *p = pixel; 00231 break; 00232 00233 case 2: 00234 *(Uint16 *)p = SDLAlpha16(pixel, *(Uint16 *)p, color.a); 00235 break; 00236 00237 case 3: 00238 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) 00239 { 00240 p[0] = (pixel >> 16) & 0xff; 00241 p[1] = (pixel >> 8) & 0xff; 00242 p[2] = pixel & 0xff; 00243 } 00244 else 00245 { 00246 p[0] = pixel & 0xff; 00247 p[1] = (pixel >> 8) & 0xff; 00248 p[2] = (pixel >> 16) & 0xff; 00249 } 00250 break; 00251 00252 case 4: 00253 *(Uint32 *)p = SDLAlpha32(pixel, *(Uint32 *)p, color.a); 00254 break; 00255 } 00256 00257 SDL_UnlockSurface(surface); 00258 } 00259 } 00260 00261 #endif // end GCN_SDLPIXEL_HPP