1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* Aethyra
* Copyright (C) 2004 The Mana World Development Team
*
* This file is part of Aethyra based on original code
* from The Mana World.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef IMAGE_H
#define IMAGE_H
#include <SDL.h>
#include "../main.h"
#ifdef USE_OPENGL
/* The definition of OpenGL extensions by SDL is giving problems with recent
* gl.h headers, since they also include these definitions. As we're not using
* extensions anyway it's safe to just disable the SDL version.
*/
#define NO_SDL_GLEXT
#include <SDL_opengl.h>
#endif
#include "resource.h"
class Dye;
class SDL_Rect;
class SDL_Surface;
/**
* Defines a class for loading and storing images.
*/
class Image : public Resource
{
friend class Graphics;
#ifdef USE_OPENGL
friend class OpenGLGraphics;
#endif
public:
/**
* Destructor.
*/
virtual ~Image();
/**
* Loads an image from a buffer in memory.
*
* @param buffer The memory buffer containing the image data.
* @param bufferSize The size of the memory buffer in bytes.
*
* @return <code>NULL</code> if an error occurred, a valid pointer
* otherwise.
*/
static Resource *load(void *buffer, unsigned bufferSize);
/**
* Loads an image from a buffer in memory and recolors it.
*
* @param buffer The memory buffer containing the image data.
* @param bufferSize The size of the memory buffer in bytes.
* @param dye The dye used to recolor the image.
*
* @return <code>NULL</code> if an error occurred, a valid pointer
* otherwise.
*/
static Resource *load(void *buffer, unsigned bufferSize,
Dye const &dye);
/**
* Loads an image from an SDL surface.
*/
static Image *load(SDL_Surface *);
/**
* Frees the resources created by SDL.
*/
virtual void unload();
/**
* Returns the width of the image.
*/
virtual int getWidth() const
{ return mBounds.w; }
/**
* Returns the height of the image.
*/
virtual int getHeight() const
{ return mBounds.h; }
/**
* Creates a new image with the desired clipping rectangle.
*
* @return <code>NULL</code> if creation failed and a valid
* object otherwise.
*/
virtual Image *getSubImage(int x, int y, int width, int height);
/**
* Sets the alpha value of this image.
*/
virtual void setAlpha(float alpha);
/**
* Returns the alpha value of this image.
*/
float getAlpha();
#ifdef USE_OPENGL
/**
* Sets the target image format. Use <code>false</code> for SDL and
* <code>true</code> for OpenGL.
*/
static void setLoadAsOpenGL(bool useOpenGL);
#endif
protected:
/**
* Constructor.
*/
#ifdef USE_OPENGL
Image(GLuint glimage, int width, int height,
int texWidth, int texHeight);
/**
* Returns the first power of two equal or bigger than the input.
*/
static int powerOfTwo(int input);
#endif
Image(SDL_Surface *image);
SDL_Rect mBounds;
bool mLoaded;
#ifdef USE_OPENGL
GLuint mGLImage;
int mTexWidth, mTexHeight;
static bool mUseOpenGL;
static int mTextureType;
static int mTextureSize;
#endif
SDL_Surface *mImage;
float mAlpha;
};
/**
* A clipped version of a larger image.
*/
class SubImage : public Image
{
public:
/**
* Constructor.
*/
SubImage(Image *parent, SDL_Surface *image,
int x, int y, int width, int height);
#ifdef USE_OPENGL
SubImage(Image *parent, GLuint image, int x, int y,
int width, int height, int texWidth, int textHeight);
#endif
/**
* Destructor.
*/
~SubImage();
/**
* Creates a new image with the desired clipping rectangle.
*
* @return <code>NULL</code> if creation failed and a valid
* image otherwise.
*/
Image *getSubImage(int x, int y, int width, int height);
private:
Image *mParent;
};
#endif
|
