Claw
1.7.0
|
00001 /* 00002 CLAW - a C++ Library Absolutely Wonderful 00003 00004 CLAW is a free library without any particular aim but being useful to 00005 anyone. 00006 00007 Copyright (C) 2005-2011 Julien Jorge 00008 00009 This library is free software; you can redistribute it and/or 00010 modify it under the terms of the GNU Lesser General Public 00011 License as published by the Free Software Foundation; either 00012 version 2.1 of the License, or (at your option) any later version. 00013 00014 This library is distributed in the hope that it will be useful, 00015 but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00017 Lesser General Public License for more details. 00018 00019 You should have received a copy of the GNU Lesser General Public 00020 License along with this library; if not, write to the Free Software 00021 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00022 00023 contact: julien.jorge@gamned.org 00024 */ 00030 #include <cassert> 00031 #include <algorithm> 00032 #include <claw/exception.hpp> 00033 00034 /*----------------------------------------------------------------------------*/ 00040 template< bool Coded4Bits > 00041 claw::graphic::bitmap::reader:: 00042 rle_bitmap_output_buffer<Coded4Bits>::rle_bitmap_output_buffer 00043 ( const color_palette_type& palette, image& img ) 00044 : m_palette(palette), m_image(img), m_x(0), m_y(m_image.height() - 1) 00045 { 00046 00047 } // bitmap::reader::rle_bitmap_output_buffer::rle_bitmap_output_buffer() 00048 00049 /*----------------------------------------------------------------------------*/ 00053 template< bool Coded4Bits > 00054 void claw::graphic::bitmap::reader:: 00055 rle_bitmap_output_buffer<Coded4Bits>::next_line() 00056 { 00057 assert( m_y > 0 ); 00058 00059 m_x = 0; 00060 --m_y; 00061 } // bitmap::reader::rle_bitmap_output_buffer::next_line() 00062 00063 /*----------------------------------------------------------------------------*/ 00069 template< bool Coded4Bits > 00070 void claw::graphic::bitmap::reader:: 00071 rle_bitmap_output_buffer<Coded4Bits>::delta_move 00072 (unsigned char x, unsigned char y) 00073 { 00074 assert( m_x + x < m_image.width() ); 00075 assert( m_y + y < m_image.height() ); 00076 00077 m_x += x; 00078 m_y += y; 00079 } // bitmap::reader::rle_bitmap_output_buffer::delta_move() 00080 00081 00082 //****************************************************************************** 00083 00084 00085 /*----------------------------------------------------------------------------*/ 00092 template< typename OutputBuffer > 00093 void claw::graphic::bitmap::reader::rle_bitmap_decoder<OutputBuffer>::read_mode 00094 ( file_input_buffer& input, output_buffer_type& output) 00095 { 00096 this->m_mode = this->stop; 00097 bool ok = true; 00098 00099 if ( input.remaining() < 2) 00100 ok = input.read_more(2); 00101 00102 if (ok) 00103 { 00104 unsigned char key, pattern; 00105 00106 key = input.get_next(); 00107 pattern = input.get_next(); 00108 00109 // compressed data, next byte is the pattern 00110 if (key > 0) 00111 { 00112 this->m_mode = this->compressed; 00113 this->m_count = key; 00114 this->m_pattern = pattern; 00115 } 00116 else switch( pattern ) 00117 { 00118 // end of line 00119 case 0 : output.next_line(); read_mode(input, output); break; 00120 // end of file 00121 case 1 : this->m_mode = this->stop; break; 00122 // delta move 00123 case 2 : 00124 { 00125 if ( input.remaining() < 1 ) 00126 ok = input.read_more(1); 00127 00128 if (ok) 00129 { 00130 unsigned char x, y; 00131 x = pattern; 00132 y = input.get_next(); 00133 output.delta_move(x, y); 00134 read_mode(input, output); 00135 break; 00136 } 00137 } 00138 // raw data 00139 default: this->m_mode = this->raw; this->m_count = pattern; break; 00140 } 00141 } 00142 } // bitmap::reader::rle_bitmap_decoder::read_mode() 00143 00144 00145 /*----------------------------------------------------------------------------*/ 00159 template<typename Convert> 00160 void claw::graphic::bitmap::reader::load_rgb_data 00161 ( std::istream& f, unsigned int buffer_size, const color_palette_type& palette, 00162 const Convert& pixel_convert ) 00163 { 00164 unsigned int line; 00165 00166 // lines are 4-bytes aligned, so adjust buffer's size. 00167 if (buffer_size % 4 != 0) 00168 buffer_size += 4 - buffer_size % 4; 00169 00170 char* buffer = new char[buffer_size]; 00171 00172 for (line = m_image.height(); (line>0) && !f.eof(); ) 00173 { 00174 --line; 00175 f.read(buffer, buffer_size); 00176 pixel_convert( m_image[line], buffer, palette ); 00177 } 00178 00179 delete[] buffer; 00180 00181 if ( f.rdstate() != std::ios_base::goodbit ) 00182 throw claw::bad_format("bitmap::reader::load_data"); 00183 } // bitmap::reader::load_data()