aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/src/others/irrlicht-1.8.1/source/Irrlicht/CImageWriterPNG.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/others/irrlicht-1.8.1/source/Irrlicht/CImageWriterPNG.cpp')
-rw-r--r--src/others/irrlicht-1.8.1/source/Irrlicht/CImageWriterPNG.cpp222
1 files changed, 222 insertions, 0 deletions
diff --git a/src/others/irrlicht-1.8.1/source/Irrlicht/CImageWriterPNG.cpp b/src/others/irrlicht-1.8.1/source/Irrlicht/CImageWriterPNG.cpp
new file mode 100644
index 0000000..6c6386e
--- /dev/null
+++ b/src/others/irrlicht-1.8.1/source/Irrlicht/CImageWriterPNG.cpp
@@ -0,0 +1,222 @@
1// Copyright (C) 2002-2012 Nikolaus Gebhardt
2// This file is part of the "Irrlicht Engine".
3// For conditions of distribution and use, see copyright notice in irrlicht.h
4
5#include "CImageWriterPNG.h"
6
7#ifdef _IRR_COMPILE_WITH_PNG_WRITER_
8
9#include "CImageLoaderPNG.h"
10#include "CColorConverter.h"
11#include "IWriteFile.h"
12#include "irrString.h"
13#include "os.h" // for logging
14
15#ifdef _IRR_COMPILE_WITH_LIBPNG_
16#ifndef _IRR_USE_NON_SYSTEM_LIB_PNG_
17 #include <png.h> // use system lib png
18#else // _IRR_USE_NON_SYSTEM_LIB_PNG_
19 #include "libpng/png.h" // use irrlicht included lib png
20#endif // _IRR_USE_NON_SYSTEM_LIB_PNG_
21#endif // _IRR_COMPILE_WITH_LIBPNG_
22
23namespace irr
24{
25namespace video
26{
27
28IImageWriter* createImageWriterPNG()
29{
30 return new CImageWriterPNG;
31}
32
33#ifdef _IRR_COMPILE_WITH_LIBPNG_
34// PNG function for error handling
35static void png_cpexcept_error(png_structp png_ptr, png_const_charp msg)
36{
37 os::Printer::log("PNG fatal error", msg, ELL_ERROR);
38 longjmp(png_jmpbuf(png_ptr), 1);
39}
40
41// PNG function for warning handling
42static void png_cpexcept_warning(png_structp png_ptr, png_const_charp msg)
43{
44 os::Printer::log("PNG warning", msg, ELL_WARNING);
45}
46
47// PNG function for file writing
48void PNGAPI user_write_data_fcn(png_structp png_ptr, png_bytep data, png_size_t length)
49{
50 png_size_t check;
51
52 io::IWriteFile* file=(io::IWriteFile*)png_get_io_ptr(png_ptr);
53 check=(png_size_t) file->write((const void*)data,(u32)length);
54
55 if (check != length)
56 png_error(png_ptr, "Write Error");
57}
58#endif // _IRR_COMPILE_WITH_LIBPNG_
59
60CImageWriterPNG::CImageWriterPNG()
61{
62#ifdef _DEBUG
63 setDebugName("CImageWriterPNG");
64#endif
65}
66
67bool CImageWriterPNG::isAWriteableFileExtension(const io::path& filename) const
68{
69#ifdef _IRR_COMPILE_WITH_LIBPNG_
70 return core::hasFileExtension ( filename, "png" );
71#else
72 return false;
73#endif
74}
75
76bool CImageWriterPNG::writeImage(io::IWriteFile* file, IImage* image,u32 param) const
77{
78#ifdef _IRR_COMPILE_WITH_LIBPNG_
79 if (!file || !image)
80 return false;
81
82 // Allocate the png write struct
83 png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
84 NULL, (png_error_ptr)png_cpexcept_error, (png_error_ptr)png_cpexcept_warning);
85 if (!png_ptr)
86 {
87 os::Printer::log("PNGWriter: Internal PNG create write struct failure\n", file->getFileName(), ELL_ERROR);
88 return false;
89 }
90
91 // Allocate the png info struct
92 png_infop info_ptr = png_create_info_struct(png_ptr);
93 if (!info_ptr)
94 {
95 os::Printer::log("PNGWriter: Internal PNG create info struct failure\n", file->getFileName(), ELL_ERROR);
96 png_destroy_write_struct(&png_ptr, NULL);
97 return false;
98 }
99
100 // for proper error handling
101 if (setjmp(png_jmpbuf(png_ptr)))
102 {
103 png_destroy_write_struct(&png_ptr, &info_ptr);
104 return false;
105 }
106
107 png_set_write_fn(png_ptr, file, user_write_data_fcn, NULL);
108
109 // Set info
110 switch(image->getColorFormat())
111 {
112 case ECF_A8R8G8B8:
113 case ECF_A1R5G5B5:
114 png_set_IHDR(png_ptr, info_ptr,
115 image->getDimension().Width, image->getDimension().Height,
116 8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
117 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
118 break;
119 default:
120 png_set_IHDR(png_ptr, info_ptr,
121 image->getDimension().Width, image->getDimension().Height,
122 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
123 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
124 }
125
126 s32 lineWidth = image->getDimension().Width;
127 switch(image->getColorFormat())
128 {
129 case ECF_R8G8B8:
130 case ECF_R5G6B5:
131 lineWidth*=3;
132 break;
133 case ECF_A8R8G8B8:
134 case ECF_A1R5G5B5:
135 lineWidth*=4;
136 break;
137 // TODO: Error handling in case of unsupported color format
138 default:
139 break;
140 }
141 u8* tmpImage = new u8[image->getDimension().Height*lineWidth];
142 if (!tmpImage)
143 {
144 os::Printer::log("PNGWriter: Internal PNG create image failure\n", file->getFileName(), ELL_ERROR);
145 png_destroy_write_struct(&png_ptr, &info_ptr);
146 return false;
147 }
148
149 u8* data = (u8*)image->lock();
150 switch(image->getColorFormat())
151 {
152 case ECF_R8G8B8:
153 CColorConverter::convert_R8G8B8toR8G8B8(data,image->getDimension().Height*image->getDimension().Width,tmpImage);
154 break;
155 case ECF_A8R8G8B8:
156 CColorConverter::convert_A8R8G8B8toA8R8G8B8(data,image->getDimension().Height*image->getDimension().Width,tmpImage);
157 break;
158 case ECF_R5G6B5:
159 CColorConverter::convert_R5G6B5toR8G8B8(data,image->getDimension().Height*image->getDimension().Width,tmpImage);
160 break;
161 case ECF_A1R5G5B5:
162 CColorConverter::convert_A1R5G5B5toA8R8G8B8(data,image->getDimension().Height*image->getDimension().Width,tmpImage);
163 break;
164#ifndef _DEBUG
165 // TODO: Error handling in case of unsupported color format
166 default:
167 break;
168#endif
169 }
170 image->unlock();
171
172 // Create array of pointers to rows in image data
173
174 //Used to point to image rows
175 u8** RowPointers = new png_bytep[image->getDimension().Height];
176 if (!RowPointers)
177 {
178 os::Printer::log("PNGWriter: Internal PNG create row pointers failure\n", file->getFileName(), ELL_ERROR);
179 png_destroy_write_struct(&png_ptr, &info_ptr);
180 delete [] tmpImage;
181 return false;
182 }
183
184 data=tmpImage;
185 // Fill array of pointers to rows in image data
186 for (u32 i=0; i<image->getDimension().Height; ++i)
187 {
188 RowPointers[i]=data;
189 data += lineWidth;
190 }
191 // for proper error handling
192 if (setjmp(png_jmpbuf(png_ptr)))
193 {
194 png_destroy_write_struct(&png_ptr, &info_ptr);
195 delete [] RowPointers;
196 delete [] tmpImage;
197 return false;
198 }
199
200 png_set_rows(png_ptr, info_ptr, RowPointers);
201
202 if (image->getColorFormat()==ECF_A8R8G8B8 || image->getColorFormat()==ECF_A1R5G5B5)
203 png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_BGR, NULL);
204 else
205 {
206 png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
207 }
208
209 delete [] RowPointers;
210 delete [] tmpImage;
211 png_destroy_write_struct(&png_ptr, &info_ptr);
212 return true;
213#else
214 return false;
215#endif
216}
217
218} // namespace video
219} // namespace irr
220
221#endif
222
generated by cgit v1.1 at 2024-05-15 20:36:02 +0000