source: libpipi/trunk/pipi/codec/sdl.c @ 2605

Last change on this file since 2605 was 2605, checked in by Sam Hocevar, 14 years ago
  • Big API reorganisation. Now libpipi can transparently convert between colour spaces for a given image. For instance, if pipi_gaussian_blur is applied to a 32-bpp image, it is automatically converted to gamma-corrected 32-bit floats beforehands, then converted back to normal.
  • TODO: clipping, regions of interest, more formats, getpixel macros...
File size: 2.8 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 != 4)
40    {
41        img = pipi_new(priv->w, priv->h);
42        SDL_BlitSurface(priv, NULL, img->codec_priv, NULL);
43        SDL_FreeSurface(priv);
44        return img;
45    }
46
47    img = (pipi_image_t *)malloc(sizeof(pipi_image_t));
48    memset(img, 0, sizeof(pipi_image_t));
49
50    img->w = priv->w;
51    img->h = priv->h;
52
53    img->p[PIPI_PIXELS_RGBA32].pixels = priv->pixels;
54    img->p[PIPI_PIXELS_RGBA32].w = priv->w;
55    img->p[PIPI_PIXELS_RGBA32].h = priv->h;
56    img->p[PIPI_PIXELS_RGBA32].pitch = priv->pitch;
57    img->last_modified = PIPI_PIXELS_RGBA32;
58
59    img->codec_priv = (void *)priv;
60    img->codec_format = PIPI_PIXELS_RGBA32;
61
62    return img;
63}
64
65pipi_image_t *pipi_new_sdl(int width, int height)
66{
67    pipi_image_t *img;
68    SDL_Surface *priv;
69    Uint32 rmask, gmask, bmask, amask;
70#if SDL_BYTEORDER == SDL_BIG_ENDIAN
71    rmask = 0xff000000;
72    gmask = 0x00ff0000;
73    bmask = 0x0000ff00;
74    amask = 0x00000000;
75#else
76    rmask = 0x000000ff;
77    gmask = 0x0000ff00;
78    bmask = 0x00ff0000;
79    amask = 0x00000000;
80#endif
81    priv = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32,
82                                rmask, gmask, bmask, amask);
83
84    if(!priv)
85        return NULL;
86
87    img = (pipi_image_t *)malloc(sizeof(pipi_image_t));
88    memset(img, 0, sizeof(pipi_image_t));
89
90    img->w = priv->w;
91    img->h = priv->h;
92
93    img->p[PIPI_PIXELS_RGBA32].pixels = priv->pixels;
94    img->p[PIPI_PIXELS_RGBA32].w = priv->w;
95    img->p[PIPI_PIXELS_RGBA32].h = priv->h;
96    img->p[PIPI_PIXELS_RGBA32].pitch = priv->pitch;
97    img->last_modified = PIPI_PIXELS_RGBA32;
98
99    img->codec_priv = (void *)priv;
100    img->codec_format = PIPI_PIXELS_RGBA32;
101
102    return img;
103}
104
105void pipi_free_sdl(pipi_image_t *img)
106{
107    SDL_FreeSurface(img->codec_priv);
108
109    free(img);
110}
111
112void pipi_save_sdl(pipi_image_t *img, const char *name)
113{
114    pipi_getpixels(img, img->codec_format);
115    SDL_SaveBMP(img->codec_priv, name);
116}
117
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