1 /*! ========================================================================
3 ** png_trgt Target Module
4 ** $Id: trgt_png.cpp,v 1.1.1.1 2005/01/04 01:23:14 darco Exp $
6 ** Copyright (c) 2002 Robert B. Quattlebaum Jr.
8 ** This software and associated documentation
9 ** are CONFIDENTIAL and PROPRIETARY property of
10 ** the above-mentioned copyright holder.
12 ** You may not copy, print, publish, or in any
13 ** other way distribute this software without
14 ** a prior written agreement with
15 ** the copyright holder.
17 ** === N O T E S ===========================================================
19 ** ========================================================================= */
21 /* === H E A D E R S ======================================================= */
34 #include <ETL/stringf>
42 /* === M A C R O S ========================================================= */
44 using namespace sinfg;
48 /* === G L O B A L S ======================================================= */
50 SINFG_TARGET_INIT(png_trgt);
51 SINFG_TARGET_SET_NAME(png_trgt,"png");
52 SINFG_TARGET_SET_EXT(png_trgt,"png");
53 SINFG_TARGET_SET_VERSION(png_trgt,"0.1");
54 SINFG_TARGET_SET_CVS_ID(png_trgt,"$Id: trgt_png.cpp,v 1.1.1.1 2005/01/04 01:23:14 darco Exp $");
56 /* === M E T H O D S ======================================================= */
59 png_trgt::png_out_error(png_struct *png_data,const char *msg)
61 png_trgt *me=(png_trgt*)png_data->error_ptr;
62 sinfg::error(strprintf("png_trgt: error: %s",msg));
67 png_trgt::png_out_warning(png_struct *png_data,const char *msg)
69 png_trgt *me=(png_trgt*)png_data->error_ptr;
70 sinfg::warning(strprintf("png_trgt: warning: %s",msg));
75 //Target *png_trgt::New(const char *filename){ return new png_trgt(filename);}
77 png_trgt::png_trgt(const char *Filename)
92 delete [] color_buffer;
96 png_trgt::set_rend_desc(RendDesc *given_desc)
98 //given_desc->set_pixel_format(PixelFormat((int)PF_RGB|(int)PF_A));
100 imagecount=desc.get_frame_start();
101 if(desc.get_frame_end()-desc.get_frame_start()>0)
109 png_trgt::end_frame()
113 png_write_end(png_ptr,info_ptr);
114 png_destroy_write_struct(&png_ptr, &info_ptr);
117 if(file && file!=stdout)
125 png_trgt::start_frame(sinfg::ProgressCallback *callback)
127 int w=desc.get_w(),h=desc.get_h();
129 if(file && file!=stdout)
133 if(callback)callback->task(strprintf("(stdout) %d",imagecount).c_str());
139 newfilename(filename),
140 ext(find(filename.begin(),filename.end(),'.'),filename.end());
141 newfilename.erase(find(newfilename.begin(),newfilename.end(),'.'),newfilename.end());
143 newfilename+=etl::strprintf("%04d",imagecount)+ext;
144 file=fopen(newfilename.c_str(),"wb");
145 if(callback)callback->task(newfilename);
149 file=fopen(filename.c_str(),"wb");
150 if(callback)callback->task(filename);
157 buffer=new unsigned char[4*w];
159 delete [] color_buffer;
160 color_buffer=new Color[w];
162 png_ptr=png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)this,png_out_error, png_out_warning);
165 sinfg::error("Unable to setup PNG struct");
170 info_ptr= png_create_info_struct(png_ptr);
173 sinfg::error("Unable to setup PNG info struct");
175 png_destroy_write_struct(&png_ptr,(png_infopp)NULL);
179 if (setjmp(png_jmpbuf(png_ptr)))
181 sinfg::error("Unable to setup longjump");
182 png_destroy_write_struct(&png_ptr, &info_ptr);
186 png_init_io(png_ptr,file);
187 png_set_filter(png_ptr,0,PNG_FILTER_NONE);
189 setjmp(png_jmpbuf(png_ptr));
190 png_set_IHDR(png_ptr,info_ptr,w,h,8,PNG_COLOR_TYPE_RGBA,PNG_INTERLACE_NONE,PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
193 //png_set_gAMA(png_ptr, info_ptr,1.0/gamma().get_gamma());
194 png_set_gAMA(png_ptr, info_ptr,gamma().get_gamma());
196 // Write the physical size
197 png_set_pHYs(png_ptr,info_ptr,round_to_int(desc.get_x_res()),round_to_int(desc.get_y_res()),PNG_RESOLUTION_METER);
199 // Output any text info along with the file
202 { PNG_TEXT_COMPRESSION_NONE, "Title", const_cast<char *>(get_canvas()->get_name().c_str()) },
203 { PNG_TEXT_COMPRESSION_NONE, "Description", const_cast<char *>(get_canvas()->get_description().c_str()) },
204 { PNG_TEXT_COMPRESSION_NONE, "Copyright", "(c) 2004 Voria Studios, LLC" },
205 { PNG_TEXT_COMPRESSION_NONE, "Software", "SINFG" },
207 png_set_text(png_ptr,info_ptr,comments,sizeof(comments)/sizeof(png_text));
209 png_write_info_before_PLTE(png_ptr, info_ptr);
210 png_write_info(png_ptr, info_ptr);
216 png_trgt::start_scanline(int scanline)
222 png_trgt::end_scanline()
227 convert_color_format(buffer, color_buffer, desc.get_w(), PF_RGB|PF_A, gamma());
229 setjmp(png_jmpbuf(png_ptr));
230 png_write_row(png_ptr,buffer);