Mercurial > sdl-ios-xcode

view src/video/SDL_pixels_c.h @ 1012:f14e3059e138

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Date: Mon, 13 Dec 2004 21:28:18 -0500 From: Jonathan Atkins Subject: [SDL] SDL_SaveBMP width bugfix this fixes the pitch versus width difference that can happen (especially for 8bit and 24bit (with the exact RGBAmasks) surfaces) when you use SDL_SaveBMP. The problem was the pitch was used instead of the width, which in some cases is much wider than the screen area you really want to save...making for ugly crud on the saved image borders. This code has been tested with & without pitch overhangs...and with the right masks for 24 bit surfaces. I tested 8,15,16,24,32-0RGB,32-RGBA(with no SDL_SRCALPHA flag).
author Sam Lantinga <slouken@libsdl.org>
date Tue, 14 Dec 2004 06:20:49 +0000
parents b8d311d90021
children c9b51268668f
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

/* Useful functions and variables from SDL_pixel.c */

#include "SDL_blit.h"

/* Pixel format functions */
extern SDL_PixelFormat *SDL_AllocFormat(int bpp,
		Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
extern SDL_PixelFormat *SDL_ReallocFormat(SDL_Surface *surface, int bpp,
		Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
extern void SDL_FormatChanged(SDL_Surface *surface);
extern void SDL_FreeFormat(SDL_PixelFormat *format);

/* Blit mapping functions */
extern SDL_BlitMap *SDL_AllocBlitMap(void);
extern void SDL_InvalidateMap(SDL_BlitMap *map);
extern int SDL_MapSurface (SDL_Surface *src, SDL_Surface *dst);
extern void SDL_FreeBlitMap(SDL_BlitMap *map);

/* Miscellaneous functions */
extern Uint16 SDL_CalculatePitch(SDL_Surface *surface);
extern void SDL_DitherColors(SDL_Color *colors, int bpp);
extern Uint8 SDL_FindColor(SDL_Palette *pal, Uint8 r, Uint8 g, Uint8 b);
extern void SDL_ApplyGamma(Uint16 *gamma, SDL_Color *colors, SDL_Color *output, int ncolors);