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comparison ext/guichan-0.8.1/src/sdl/sdlimageloader.cpp @ 0:4a0efb7baf70

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* Datasets becomes the new trunk and retires after that :-)
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Sun, 29 Jun 2008 18:44:17 +0000
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-1:000000000000 0:4a0efb7baf70
1 /* _______ __ __ __ ______ __ __ _______ __ __
2 * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
3 * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
4 * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
5 * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
6 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
7 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
8 *
9 * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
10 *
11 *
12 * Per Larsson a.k.a finalman
13 * Olof Naessén a.k.a jansem/yakslem
14 *
15 * Visit: http://guichan.sourceforge.net
16 *
17 * License: (BSD)
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in
25 * the documentation and/or other materials provided with the
26 * distribution.
27 * 3. Neither the name of Guichan nor the names of its contributors may
28 * be used to endorse or promote products derived from this software
29 * without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
37 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
38 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
39 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
40 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
41 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 /*
45 * For comments regarding functions please see the header file.
46 */
47
48 #include "guichan/sdl/sdlimage.hpp"
49
50 #include "SDL_image.h"
51
52 #include "guichan/exception.hpp"
53 #include "guichan/sdl/sdlimageloader.hpp"
54
55 namespace gcn
56 {
57 Image* SDLImageLoader::load(const std::string& filename,
58 bool convertToDisplayFormat)
59 {
60 SDL_Surface *loadedSurface = loadSDLSurface(filename);
61
62 if (loadedSurface == NULL)
63 {
64 throw GCN_EXCEPTION(
65 std::string("Unable to load image file: ") + filename);
66 }
67
68 SDL_Surface *surface = convertToStandardFormat(loadedSurface);
69 SDL_FreeSurface(loadedSurface);
70
71 if (surface == NULL)
72 {
73 throw GCN_EXCEPTION(
74 std::string("Not enough memory to load: ") + filename);
75 }
76
77 Image *image = new SDLImage(surface, true);
78
79 if (convertToDisplayFormat)
80 {
81 image->convertToDisplayFormat();
82 }
83
84 return image;
85 }
86
87 SDL_Surface* SDLImageLoader::loadSDLSurface(const std::string& filename)
88 {
89 return IMG_Load(filename.c_str());
90 }
91
92 SDL_Surface* SDLImageLoader::convertToStandardFormat(SDL_Surface* surface)
93 {
94 Uint32 rmask, gmask, bmask, amask;
95 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
96 rmask = 0xff000000;
97 gmask = 0x00ff0000;
98 bmask = 0x0000ff00;
99 amask = 0x000000ff;
100 #else
101 rmask = 0x000000ff;
102 gmask = 0x0000ff00;
103 bmask = 0x00ff0000;
104 amask = 0xff000000;
105 #endif
106
107 SDL_Surface *colorSurface = SDL_CreateRGBSurface(SDL_SWSURFACE,
108 0, 0, 32,
109 rmask, gmask, bmask, amask);
110
111 SDL_Surface *tmp = NULL;
112
113 if (colorSurface != NULL)
114 {
115 tmp = SDL_ConvertSurface(surface, colorSurface->format,
116 SDL_SWSURFACE);
117 SDL_FreeSurface(colorSurface);
118 }
119
120 return tmp;
121 }
122 }