source: libpipi/trunk/pipi/codec/sdl.c @ 2261

Last change on this file since 2261 was 2261, checked in by Sam Hocevar, 13 years ago
  • Split the image loaders into sdl.c, imlib.c and opencv.c. We'll do something far better, but later.
File size: 2.3 KB
Line 
1/*
2 *  libpipi       Proper image processing implementation library
3 *  Copyright (c) 2004-2008 Sam Hocevar <sam@zoy.org>
4 *                All Rights Reserved
5 *
6 *  $Id$
7 *
8 *  This library is free software. It comes without any warranty, to
9 *  the extent permitted by applicable law. You can redistribute it
10 *  and/or modify it under the terms of the Do What The Fuck You Want
11 *  To Public License, Version 2, as published by Sam Hocevar. See
12 *  http://sam.zoy.org/wtfpl/COPYING for more details.
13 */
14
15/*
16 * sdl.c: SDL_image I/O functions
17 */
18
19#include "config.h"
20#include "common.h"
21
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25
26#include <SDL_image.h>
27
28#include "pipi.h"
29#include "pipi_internals.h"
30
31pipi_image_t *pipi_load_sdl(const char *name)
32{
33    pipi_image_t *img;
34    SDL_Surface *priv = IMG_Load(name);
35
36    if(!priv)
37        return NULL;
38
39    if(priv->format->BytesPerPixel == 1)
40    {
41        img = pipi_new(priv->w, priv->h);
42        SDL_BlitSurface(priv, NULL, img->priv, NULL);
43        SDL_FreeSurface(priv);
44        return img;
45    }
46
47    img = (pipi_image_t *)malloc(sizeof(pipi_image_t));
48    img->width = priv->w;
49    img->height = priv->h;
50    img->pitch = priv->pitch;
51    img->channels = priv->format->BytesPerPixel;
52    img->pixels = priv->pixels;
53    img->priv = (void *)priv;
54
55    return img;
56}
57
58pipi_image_t *pipi_new_sdl(int width, int height)
59{
60    pipi_image_t *img;
61    SDL_Surface *priv;
62    Uint32 rmask, gmask, bmask, amask;
63#if SDL_BYTEORDER == SDL_BIG_ENDIAN
64    rmask = 0xff000000;
65    gmask = 0x00ff0000;
66    bmask = 0x0000ff00;
67    amask = 0x00000000;
68#else
69    rmask = 0x000000ff;
70    gmask = 0x0000ff00;
71    bmask = 0x00ff0000;
72    amask = 0x00000000;
73#endif
74    priv = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32,
75                                rmask, gmask, bmask, amask);
76
77    if(!priv)
78        return NULL;
79
80    img = (pipi_image_t *)malloc(sizeof(pipi_image_t));
81    img->width = priv->w;
82    img->height = priv->h;
83    img->pitch = priv->pitch;
84    img->channels = priv->format->BytesPerPixel;
85    img->pixels = priv->pixels;
86    img->priv = (void *)priv;
87
88    return img;
89}
90
91void pipi_free_sdl(pipi_image_t *img)
92{
93    SDL_FreeSurface(img->priv);
94
95    free(img);
96}
97
98void pipi_save_sdl(pipi_image_t *img, const char *name)
99{
100    SDL_SaveBMP(img->priv, name);
101}
102
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