Mercurial > sdl-ios-xcode

annotate src/video/SDL_pixels_c.h @ 3473:7bdc10624cba

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This is terrible, but the OpenGL standard says that lines are half open, which means that one endpoint is not covered so adjoining lines don't overlap. It also doesn't define which end is open, and indeed Mac OS X and Linux differ. Mac OS X seems to leave the second endpoint open, but Linux uses the right-most endpoint for x major lines and the bottom-most endpoint for y major lines.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 21 Nov 2009 07:14:21 +0000
parents 502adab079a4
children f7b03b6838cb
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* Useful functions and variables from SDL_pixel.c */
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25
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26 #include "SDL_blit.h"
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27
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28 /* Pixel format functions */
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29 extern SDL_PixelFormat *SDL_AllocFormat(int bpp,
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30 Uint32 Rmask, Uint32 Gmask,
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31 Uint32 Bmask, Uint32 Amask);
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32 extern SDL_PixelFormat *SDL_InitFormat(SDL_PixelFormat * format, int bpp,
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33 Uint32 Rmask, Uint32 Gmask,
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34 Uint32 Bmask, Uint32 Amask);
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35 extern void SDL_FormatChanged(SDL_Surface * surface);
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36 extern void SDL_FreeFormat(SDL_PixelFormat * format);
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37
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38 /* Blit mapping functions */
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39 extern SDL_BlitMap *SDL_AllocBlitMap(void);
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40 extern void SDL_InvalidateMap(SDL_BlitMap * map);
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41 extern int SDL_MapSurface(SDL_Surface * src, SDL_Surface * dst);
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42 extern void SDL_FreeBlitMap(SDL_BlitMap * map);
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44 /* Miscellaneous functions */
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45 extern int SDL_CalculatePitch(SDL_Surface * surface);
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46 extern void SDL_DitherColors(SDL_Color * colors, int bpp);
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47 extern Uint8 SDL_FindColor(SDL_Palette * pal, Uint8 r, Uint8 g, Uint8 b);
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48 extern void SDL_ApplyGamma(Uint16 * gamma, SDL_Color * colors,
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49 SDL_Color * output, int ncolors);
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50 /* vi: set ts=4 sw=4 expandtab: */