Simple Image Loading LibrarY  0.1.0
SILLYPNGImageContext.cpp
1 /***********************************************************************
2  filename: SILLYPNGImageContext.cpp
3  created: 11 Jun 2006
4  author: Olivier Delannoy
5 
6  purpose: Definition of PNGImageContext methods
7 *************************************************************************/
8 /***************************************************************************
9  * Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
10  *
11  * Permission is hereby granted, free of charge, to any person obtaining
12  * a copy of this software and associated documentation files (the
13  * "Software"), to deal in the Software without restriction, including
14  * without limitation the rights to use, copy, modify, merge, publish,
15  * distribute, sublicense, and/or sell copies of the Software, and to
16  * permit persons to whom the Software is furnished to do so, subject to
17  * the following conditions:
18  *
19  * The above copyright notice and this permission notice shall be
20  * included in all copies or substantial portions of the Software.
21  *
22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
25  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
26  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
27  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28  * OTHER DEALINGS IN THE SOFTWARE.
29  ***************************************************************************/
30 #ifdef HAVE_CONFIG_H
31 #include <config.h>
32 #endif
33 
34 #include "loaders/SILLYPNGImageContext.h"
35 
36 #ifndef SILLY_OPT_INLINE
37 #define inline
38 #include "loaders/SILLYPNGImageContext.icpp"
39 #undef inline
40 #endif
41 #include <string.h>
42 
43 // Start section of namespace SILLY
44 namespace SILLY
45 {
46 int PNGImageContext::read(png_bytep data, png_size_t length)
47 {
48  //printf("PNG Read: %d bytes offset: %d, size %d\n",
49  // length, d_offset, d_data->getSize());
50 
51  if (d_offset + length > d_data->getSize())
52  return -1;
53  memcpy(data, d_data->getDataPtr() + d_offset, length);
54  d_offset += length;
55  return length;
56 }
57 
58 
59 PNGImageContext::PNGImageContext(DataSource* data)
60  : ImageContext(0,0), d_offset(0), d_data(data), d_png_ptr(0), d_info_ptr(0)
61 {
62 
63 }
64 
65 PNGImageContext::~PNGImageContext()
66 {
67  if (d_info_ptr)
68  png_destroy_read_struct(&d_png_ptr, &d_info_ptr, 0);
69  if (d_png_ptr)
70  png_destroy_read_struct(&d_png_ptr, 0, 0);
71 }
72 
73 
74 void PNGImageContext::setImageSize()
75 {
76  setWidth(png_get_image_width(d_png_ptr, d_info_ptr));
77  setHeight(png_get_image_height(d_png_ptr, d_info_ptr));
78 
79 }
80 
81 
82 } // End section of namespace SILLY
virtual const byte * getDataPtr() const =0
Get raw access to the image data.
Simple Image Loading LibrarY namespace.
virtual size_t getSize() const =0
Return the size of the data.
ImageContext(size_t width, size_t height)
Constructor.