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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/**
* $Id$
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* 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 (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
/**
* $Id$
* Copyright (C) 2001 NaN Technologies B.V.
* Pixmap of kPixelTypeRGBA32 type.
* A pixmap with 24 bits per pixel in ABGR format.
* Provides methods to fill rectangular areas in this image with a color.
* Provides methods to paste or blend other pixmaps into this pixmap.
* @author Maarten Gribnau
* @date March 6, 2001
*/
#ifndef _H_IMG_PixmapRGBA32
#define _H_IMG_PixmapRGBA32
#include "IMG_Pixmap.h"
#include "IMG_MemPtr.h"
#include "IMG_Color.h"
class IMG_PixmapRGBA32 : public IMG_Pixmap {
public:
/** The pixel type in this pixmap. */
typedef GEN_TUns32 TPixelRGBA32;
/** The pixel pointer type of this pixmap. */
typedef TPixelRGBA32* TPixelPtr;
/** Indices of color component byes within a pixel. */
typedef enum {
bi_r = 0,
bi_g = 1,
bi_b = 2,
bi_a = 3
} TPixelIndex;
/**
* Constructor.
* Creates a new pixmap of the kPixelTypeRGBA32 type with the requested dimensions.
* @throw <IMG_MemPtr::Size> when an invalid width and/or height is passed.
* @throw <IMG_MemPtr::Memory> when a there is not enough memory to allocate the image.
* @param width the width in pixels of the image.
* @param height the height in pixels of the image.
*/
IMG_PixmapRGBA32(GEN_TUns32 width, GEN_TUns32 height);
/**
* Constructor.
* Creates a new pixmap of the kPixelTypeRGBA32 from a pointer to image data.
* The image data will not be freed upon destruction of this object.
* The owner of this object is reponsible for that.
* @throw <Size> when an invalid width and/or height is passed.
* @param image pointer to the image data.
* @param width the width in pixels of the image.
* @param height the height in pixels of the image.
*/
IMG_PixmapRGBA32(void* image, GEN_TUns32 width, GEN_TUns32 height, GEN_TUns32 rowBytes);
#if 0
/**
* Destructor.
*/
virtual ~IMG_PixmapRGBA32();
#endif
/**
* Fills the rectangle given with the color given.
* Retains the alpha values.
* Performs a bounds check.
* @param r requested bounds rectangle in the image
* @param c color to use
*/
virtual void fillRect(const GEN_Rect& r, const IMG_ColorRGB& c);
/**
* Fills the rectangle given with the color given.
* Sets the alpha values from the color.
* Performs a bounds check.
* @param r requested bounds rectangle in the image
* @param c color to use
*/
virtual void fillRect(const GEN_Rect& r, const IMG_ColorRGBA& c);
/**
* Pastes an area of a pixmap into this pixmap.
* Pastes an area of the given pixmap centered at the given coordinates into this pixmap.
* Ignores the alpha information, this is pasted as well.
* Performs a bounds check.
* @param src the pixmap to paste.
* @param srcBnds the bounds of the area of the pixmap to paste.
* @param destBnds the destination area for the paste.
*/
virtual void setPixmap(const IMG_PixmapRGBA32& src, const GEN_Rect& srcBnds, const GEN_Rect& destBnds);
/**
* Blends an area of a pixmap into this pixmap.
* Blends an area of the given pixmap centered at the given coordinates into this pixmap.
* The alpha information in the given image is used to blend.
* Performs a bounds check.
* @param src the pixmap to paste.
* @param srcBnds the bounds of the area of the pixmap to paste.
* @param destBnds the destination area for the paste.
*/
virtual void blendPixmap(const IMG_PixmapRGBA32& src, const GEN_Rect& srcBnds, const GEN_Rect& destBnds);
protected:
/**
* Returns pointer to the pixel.
* Returns a pointer of TPixelPtr type to the pixel at the requested coordinates.
* Does not perform a bounds check!
* @param x column address of the pixel.
* @param y row address of the pixel.
* @return the pointer calculated.
*/
inline TPixelPtr getPixelPtr(GEN_TUns32 x, GEN_TUns32 y) const;
/**
* Returns the pixel value of a color.
* @param c the color to convert
* @return the pixel value calculated
*/
inline TPixelRGBA32 getPixelValue(const IMG_ColorRGBA& c) const;
/**
* Returns the color of from a pixel value.
* @param p the pixel value
* @param c the color calculated
*/
inline void getColor(TPixelRGBA32 p, IMG_ColorRGBA& c) const;
protected:
/** "Save" memory pointer. */
IMG_MemPtr<TPixelRGBA32> m_pixels;
/** Pointer to the first pixel. */
TPixelPtr m_pixelsBase;
};
inline IMG_PixmapRGBA32::TPixelPtr IMG_PixmapRGBA32::getPixelPtr(GEN_TUns32 x, GEN_TUns32 y) const
{
return (TPixelPtr) (((GEN_TUns8*)m_pixelsBase) + (y*m_rowBytes) + (x<<2));
}
inline IMG_PixmapRGBA32::TPixelRGBA32 IMG_PixmapRGBA32::getPixelValue(const IMG_ColorRGBA& c) const
{
#if 0
// Obtain pixel value through shifting
TPixelRGBA32 p = ((TPixelRGBA32) (((float) 0xFF) * c.m_a)) << 24;
p |= ((TPixelRGBA32) (((float) 0xFF) * c.m_b)) << 16;
p |= ((TPixelRGBA32) (((float) 0xFF) * c.m_g)) << 8;
p |= ((TPixelRGBA32) (((float) 0xFF) * c.m_r));
return p;
#else
// Obtain pixel value through byte indexing
TPixelRGBA32 pixel;
GEN_TUns8* bytes = (GEN_TUns8*)&pixel;
bytes[bi_r] = (GEN_TUns8)(((float) 0xFF) * c.m_r);
bytes[bi_g] = (GEN_TUns8)(((float) 0xFF) * c.m_g);
bytes[bi_b] = (GEN_TUns8)(((float) 0xFF) * c.m_b);
bytes[bi_a] = (GEN_TUns8)(((float) 0xFF) * c.m_a);
return pixel;
#endif
}
inline void IMG_PixmapRGBA32::getColor(TPixelRGBA32 p, IMG_ColorRGBA& c) const
{
#if 0
// Obtain color value through shifting
c.m_a = ((float) ((p >> 24) & 0x00FF)) / ((float) 0xFF);
c.m_b = ((float) ((p >> 16) & 0x00FF)) / ((float) 0xFF);
c.m_g = ((float) ((p >> 8) & 0x00FF)) / ((float) 0xFF);
c.m_r = ((float) ( p & 0x00FF)) / ((float) 0xFF);
#else
// Obtain color value through byte indexing
GEN_TUns8* bytes = (GEN_TUns8*)&p;
c.m_r = ((float)bytes[bi_r]) / ((float) 0xFF);
c.m_g = ((float)bytes[bi_g]) / ((float) 0xFF);
c.m_b = ((float)bytes[bi_b]) / ((float) 0xFF);
c.m_a = ((float)bytes[bi_a]) / ((float) 0xFF);
#endif
}
#endif // _H_IMG_PixmapRGBA32
|
