Mercurial > fife-parpg
comparison ext/guichan-0.8.2/include/guichan/opengl/openglallegroimageloader.hpp @ 378:64738befdf3b
bringing in the changes from the build_system_rework branch in preparation for the 0.3.0 release. This commit will require the Jan2010 devkit. Clients will also need to be modified to the new way to import fife.
author | vtchill@33b003aa-7bff-0310-803a-e67f0ece8222 |
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date | Mon, 11 Jan 2010 23:34:52 +0000 |
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377:fe6fb0e0ed23 | 378:64738befdf3b |
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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 #ifndef GCN_OPENGLALLEGROIMAGELOADER_HPP | |
45 #define GCN_OPENGLALLEGROIMAGELOADER_HPP | |
46 | |
47 #include <allegro.h> | |
48 #include <alleggl.h> | |
49 | |
50 #include <guichan/imageloader.hpp> | |
51 #include <guichan/exception.hpp> | |
52 #include <guichan/opengl/openglimage.hpp> | |
53 | |
54 namespace gcn | |
55 { | |
56 /** | |
57 * OpenGL ImageLoader that loads images with Allegro. | |
58 */ | |
59 class OpenGLAllegroImageLoader : public ImageLoader | |
60 { | |
61 public: | |
62 | |
63 // Inherited from ImageLoader | |
64 | |
65 virtual Image* load(const std::string& filename, | |
66 bool convertToDisplayFormat = true) | |
67 | |
68 { | |
69 BITMAP *bmp = load_bitmap(filename.c_str(), NULL); | |
70 | |
71 if (bmp == NULL) | |
72 { | |
73 throw GCN_EXCEPTION( | |
74 std::string("Unable to load image file: ") + filename); | |
75 } | |
76 | |
77 int bitmapBpp = bitmap_color_depth(bmp); | |
78 | |
79 // As a BITMAP without an alpha channel in Allegro has | |
80 // all it's alpha values set to zero we have to check | |
81 // if the BITMAP has an alpha channel. If no alpha channel | |
82 // exists then we need to change the alpha values to 255 | |
83 // before creating the OpenGL image. | |
84 bool hasAlphaChannel = false; | |
85 int x, y; | |
86 for (y = 0; y < bmp->h; y++) | |
87 { | |
88 for (x = 0; x < bmp->w; x++) | |
89 { | |
90 int pixel = getpixel(bmp, x, y); | |
91 if (geta_depth(bitmapBpp, pixel) != 0) | |
92 { | |
93 hasAlphaChannel = true; | |
94 } | |
95 } | |
96 } | |
97 | |
98 unsigned int *pixels = new unsigned int[bmp->w * bmp->h]; | |
99 | |
100 for (y = 0; y < bmp->h; y++) | |
101 { | |
102 for (x = 0; x < bmp->w; x++) | |
103 { | |
104 int pixel = getpixel(bmp,x, y); | |
105 | |
106 if (!hasAlphaChannel) | |
107 { | |
108 pixels[x + y * bmp->w] = pixel | 0xff000000; | |
109 } | |
110 else | |
111 { | |
112 pixels[x + y * bmp->w] = pixel; | |
113 } | |
114 } | |
115 } | |
116 | |
117 OpenGLImage *image = new OpenGLImage(pixels, | |
118 bmp->w, | |
119 bmp->h, | |
120 convertToDisplayFormat); | |
121 | |
122 delete[] pixels; | |
123 destroy_bitmap(bmp); | |
124 | |
125 return image; | |
126 } | |
127 }; | |
128 } | |
129 | |
130 #endif // end GCN_OPENGLALLEGROIMAGELOADER_HPP |