+++ /dev/null
-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
-//
-// By downloading, copying, installing or using the software you agree to this license.
-// If you do not agree to this license, do not download, install,
-// copy or use the software.
-//
-//
-// Intel License Agreement
-// For Open Source Computer Vision Library
-//
-// Copyright (C) 2000, Intel Corporation, all rights reserved.
-// Third party copyrights are property of their respective owners.
-//
-// Redistribution and use in source and binary forms, with or without modification,
-// are permitted provided that the following conditions are met:
-//
-// * Redistribution's of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.
-//
-// * Redistribution's in binary form must reproduce the above copyright notice,
-// this list of conditions and the following disclaimer in the documentation
-// and/or other materials provided with the distribution.
-//
-// * The name of Intel Corporation may not be used to endorse or promote products
-// derived from this software without specific prior written permission.
-//
-// This software is provided by the copyright holders and contributors "as is" and
-// any express or implied warranties, including, but not limited to, the implied
-// warranties of merchantability and fitness for a particular purpose are disclaimed.
-// In no event shall the Intel Corporation or contributors be liable for any direct,
-// indirect, incidental, special, exemplary, or consequential damages
-// (including, but not limited to, procurement of substitute goods or services;
-// loss of use, data, or profits; or business interruption) however caused
-// and on any theory of liability, whether in contract, strict liability,
-// or tort (including negligence or otherwise) arising in any way out of
-// the use of this software, even if advised of the possibility of such damage.
-//
-//M*/
-
-#include "grfmt_bmp.h"
-#include <assert.h>
-#include <string.h>
-
-/************************ BMP reader *****************************/
-
-GrFmtBmpReader::GrFmtBmpReader()
-{
- m_sign_len = 2;
- m_signature ="BM";
- m_description = "Windows bitmap (*.bmp;*.dib)";
- m_offset = -1;
-}
-
-
-int GrFmtBmpReader::GetColor()
-{
- return m_bpp > 8 ? 1 : -1;
-}
-
-
-void GrFmtBmpReader::Close()
-{
- m_strm.Close();
-}
-
-
-bool GrFmtBmpReader::ReadHeader()
-{
- bool result = false;
-
- assert( strlen(m_filename) != 0 );
- if( !m_strm.Open( m_filename )) return false;
-
- try
- {
- m_strm.Skip( 10 );
- m_offset = m_strm.GetDWord();
-
- int size = m_strm.GetDWord();
-
- if( size >= 36 )
- {
- m_width = m_strm.GetDWord();
- m_height = m_strm.GetDWord();
- m_bpp = m_strm.GetDWord() >> 16;
- m_rle_code = m_strm.GetDWord();
- m_strm.Skip(12);
- int clrused = m_strm.GetDWord();
- m_strm.Skip( size - 36 );
-
- if( m_width > 0 && m_height > 0 &&
- (((m_bpp == 1 || m_bpp == 4 || m_bpp == 8 ||
- m_bpp == 24 || m_bpp == 32 ) && m_rle_code == 0) ||
- (m_bpp == 4 && m_rle_code == 2) || (m_bpp == 8 && m_rle_code == 1)))
- {
- if( m_bpp <= 8 )
- {
- memset( m_palette, 0, sizeof(m_palette));
- m_strm.GetBytes( m_palette, (clrused == 0? 1<<m_bpp : clrused)*4 );
- }
- result = true;
- }
- }
- else if( size == 12 )
- {
- m_width = m_strm.GetWord();
- m_height = m_strm.GetWord();
- m_bpp = m_strm.GetDWord() >> 16;
- m_rle_code = 0;
-
- if( m_width > 0 && m_height > 0 &&
- (m_bpp == 1 || m_bpp == 4 || m_bpp == 8 ||
- m_bpp == 24 || m_bpp == 32 ))
- {
- if( m_bpp <= 8 )
- {
- uchar buffer[256*3];
- int j, clrused = 1 << m_bpp;
- m_strm.GetBytes( buffer, clrused*3 );
- for( j = 0; j < clrused; j++ )
- {
- m_palette[j].b = buffer[3*j+0];
- m_palette[j].g = buffer[3*j+1];
- m_palette[j].r = buffer[3*j+2];
- }
- }
- result = true;
- }
- }
- }
- catch( int )
- {
- }
-
- if( !result )
- {
- m_offset = -1;
- m_width = m_height = -1;
- m_strm.Close();
- }
- return result;
-}
-
-bool GrFmtBmpReader::ReadData( uchar* data, int step, int color )
-{
- const int buffer_size = 1 << 12;
- uchar buffer[buffer_size];
- uchar bgr_buffer[buffer_size];
- uchar gray_palette[256];
- bool result = false;
- uchar* src = buffer;
- uchar* bgr = bgr_buffer;
- int src_pitch = ((m_width*m_bpp + 7)/8 + 3) & -4;
- int nch = color ? 3 : 1;
- int width3 = m_width*nch;
- int delta = -(width3 + step);
- int y;
-
- if( m_offset < 0 || !m_strm.IsOpened())
- return false;
-
- data += (m_height - 1)*step;
-
- if( m_bpp != 24 )
- {
- if( src_pitch+32 > buffer_size ) src = new uchar[src_pitch+32];
- }
-
- if( !color )
- {
- if( m_bpp <= 8 )
- {
- CvtPaletteToGray( m_palette, gray_palette, 1 << m_bpp );
- }
- if( m_width*3 + 32 > buffer_size ) bgr = new uchar[m_width*3 + 32];
- }
-
- try
- {
- m_strm.SetPos( m_offset );
-
- switch( m_bpp )
- {
- /************************* 1 BPP ************************/
- case 1:
- for( y = 0; y < m_height; y++, data -= step )
- {
- m_strm.GetBytes( src, src_pitch );
- FillColorRow1( color ? data : bgr, src, m_width, m_palette );
- if( !color ) CvtBGRToGray( bgr, data, m_width );
- }
- result = true;
- break;
-
- /************************* 4 BPP ************************/
- case 4:
- if( m_rle_code == 0 )
- {
- for( y = 0; y < m_height; y++, data -= step )
- {
- m_strm.GetBytes( src, src_pitch );
- if( color )
- FillColorRow4( data, src, m_width, m_palette );
- else
- FillGrayRow4( data, src, m_width, gray_palette );
- }
- result = true;
- }
- else if( m_rle_code == 2 ) // rle4 compression
- {
- uchar* line_end = data + width3;
- y = 0;
-
- for(;;)
- {
- int code = m_strm.GetWord();
- int len = code & 255;
- code >>= 8;
- if( len != 0 ) // encoded mode
- {
- PaletteEntry clr[2];
- int t = 0;
- clr[0] = m_palette[code >> 4];
- clr[1] = m_palette[code & 15];
- uchar* end = data + len*nch;
- if( end > line_end ) goto decode_rle4_bad;
- do
- {
- if( color )
- {
- WRITE_PIX( data, clr[t] );
- }
- else
- {
- WRITE_PIX( bgr, clr[t] );
- CvtBGRToGray( bgr, data, 1 );
- }
- t ^= 1;
- }
- while( (data += nch) < end );
- }
- else if( code > 2 ) // absolute mode
- {
- if( data + code*nch > line_end ) goto decode_rle4_bad;
- m_strm.GetBytes( src, (((code + 1)>>1) + 1) & -2 );
- if( color )
- data = FillColorRow4( data, src, code, m_palette );
- else
- data = FillGrayRow4( data, src, code, gray_palette );
- }
- else
- {
- if( code == 0 ) // line end
- {
- if( data < line_end )
- {
- FillUni( data, line_end, width3, delta,
- line_end - data, 0, m_palette[0], color );
- }
- data = line_end + delta;
- line_end = data + width3;
- if( ++y == m_height ) goto decode_rle4_good;
- }
- else if( code == 1 ) // image end
- goto decode_rle4_good;
- else // delta
- {
- int x_shift3 = m_strm.GetByte()*nch;
- int y_shift = m_strm.GetByte();
-
- if( (y += y_shift) >= m_height ||
- data + x_shift3 > line_end ) goto decode_rle4_bad;
-
- data = FillUni( data, line_end, width3, delta,
- x_shift3, y_shift, m_palette[0], color );
- line_end -= step*y_shift;
- }
- }
- }
-decode_rle4_good:
- result = true;
-decode_rle4_bad: ;
- }
- break;
-
- /************************* 8 BPP ************************/
- case 8:
- if( m_rle_code == 0 )
- {
- for( y = 0; y < m_height; y++, data -= step )
- {
- m_strm.GetBytes( src, src_pitch );
- if( color )
- FillColorRow8( data, src, m_width, m_palette );
- else
- FillGrayRow8( data, src, m_width, gray_palette );
- }
- result = true;
- }
- else if( m_rle_code == 1 ) // rle8 compression
- {
- uchar* line_end = data + width3;
- y = 0;
-
- for(;;)
- {
- int code = m_strm.GetWord();
- int len = code & 255;
- code >>= 8;
- if( len != 0 ) // encoded mode
- {
- len *= nch;
- if( data + len > line_end ) goto decode_rle8_bad;
- data = FillUni( data, line_end, width3, delta,
- len, 0, m_palette[code], color );
- }
- else if( code > 2 ) // absolute mode
- {
- int code3 = code*nch;
- if( data + code3 > line_end ) goto decode_rle8_bad;
- m_strm.GetBytes( src, (code + 1) & -2 );
- if( color )
- data = FillColorRow8( data, src, code, m_palette );
- else
- data = FillGrayRow8( data, src, code, gray_palette );
- }
- else
- {
- if( code == 0 ) // line end
- {
- if( data < line_end )
- {
- FillUni( data, line_end, width3, delta,
- line_end - data, 0, m_palette[0], color );
- }
- data = line_end + delta;
- line_end = data + width3;
- if( ++y == m_height ) goto decode_rle8_good;
- }
- else if( code == 1 ) // image end
- goto decode_rle8_good;
- else // delta
- {
- int x_shift3 = m_strm.GetByte()*nch;
- int y_shift = m_strm.GetByte();
-
- if( (y += y_shift) >= m_height ||
- data + x_shift3 > line_end ) goto decode_rle8_bad;
-
- data = FillUni( data, line_end, width3, delta,
- x_shift3, y_shift, m_palette[0], color );
- line_end -= step*y_shift;
- }
- }
- }
-decode_rle8_good:
- result = true;
-decode_rle8_bad: ;
- }
- break;
- /************************* 24 BPP ************************/
- case 24:
- for( y = 0; y < m_height; y++, data -= step )
- {
- m_strm.GetBytes( color ? data : bgr, src_pitch );
- if( !color ) CvtBGRToGray( bgr, data, m_width );
- }
- result = true;
- break;
- /************************* 32 BPP ************************/
- case 32:
- for( y = 0; y < m_height; y++, data -= step )
- {
- m_strm.GetBytes( src, src_pitch );
- FillRow32( color ? data : bgr, src, m_width );
- if( !color ) CvtBGRToGray( bgr, data, m_width );
- }
- result = true;
- break;
- default:
- assert(0);
- }
- }
- catch( int )
- {
- }
-
- if( src != buffer ) delete src;
- if( bgr != bgr_buffer ) delete bgr;
- return true;
-}
-
-
-/************************ Sun Raster reader *****************************/
-
-GrFmtSunRasterReader::GrFmtSunRasterReader()
-{
- m_sign_len = 4;
- m_signature ="\x59\xA6\x6A\x95";
- m_description = "Sun raster files (*.sr)";
- m_offset = -1;
-}
-
-
-void GrFmtSunRasterReader::Close()
-{
- m_strm.Close();
-}
-
-
-bool GrFmtSunRasterReader::ReadHeader()
-{
- bool result = false;
-
- assert( strlen(m_filename) != 0 );
- if( !m_strm.Open( m_filename )) return false;
-
- try
- {
- m_strm.Skip( 4 );
- m_width = m_strm.GetDWord();
- m_height = m_strm.GetDWord();
- m_bpp = m_strm.GetDWord();
- int palSize = 3*(1 << m_bpp);
-
- m_strm.Skip( 4 );
- m_type = (SunRasType)m_strm.GetDWord();
- m_maptype = (SunRasMapType)m_strm.GetDWord();
- m_maplength = m_strm.GetDWord();
-
- if( m_width > 0 && m_height > 0 &&
- (m_bpp == 1 || m_bpp == 8 || m_bpp == 24 || m_bpp == 32) &&
- (m_type == RT_OLD || m_type == RT_STANDARD ||
- (m_type == RT_BYTE_ENCODED && m_bpp == 8) || m_type == RT_FORMAT_RGB) &&
- (m_maptype == RMT_NONE && m_maplength == 0 ||
- m_maptype == RMT_EQUAL_RGB && m_maplength == palSize && m_bpp <= 8))
- {
- if( m_maplength != 0 )
- {
- int readed;
- uchar buffer[256*3];
-
- m_strm.GetBytes( buffer, palSize, &readed );
- if( readed == palSize )
- {
- int i;
- palSize /= 3;
-
- for( i = 0; i < palSize; i++ )
- {
- m_palette[i].b = buffer[i*3 + 2];
- m_palette[i].g = buffer[i*3 + 1];
- m_palette[i].r = buffer[i*3];
- m_palette[i].a = 0;
- }
-
- m_offset = m_strm.GetPos();
-
- assert( m_offset == 32 + m_maplength );
- result = true;
- }
- }
- else
- {
- if( m_bpp <= 8 )
- FillGrayPalette( m_palette, m_bpp );
-
- m_offset = m_strm.GetPos();
-
- assert( m_offset == 32 + m_maplength );
- result = true;
- }
- }
- }
- catch( int )
- {
- }
-
- if( !result )
- {
- m_offset = -1;
- m_width = m_height = -1;
- m_strm.Close();
- }
- return result;
-}
-
-
-int GrFmtSunRasterReader::GetColor()
-{
- return m_bpp > 8 || m_maptype == RMT_EQUAL_RGB ? 1 : 0;
-}
-
-
-bool GrFmtSunRasterReader::ReadData( uchar* data, int step, int color )
-{
- const int buffer_size = 1 << 12;
- uchar buffer[buffer_size];
- uchar bgr_buffer[buffer_size];
- uchar gray_palette[256];
- bool result = false;
- uchar* src = buffer;
- uchar* bgr = bgr_buffer;
- int src_pitch = ((m_width*m_bpp + 7)/8 + 3) & -4;
- int nch = color ? 3 : 1;
- int width3 = m_width*nch;
- int delta = step - width3;
- int y;
-
- if( m_offset < 0 || !m_strm.IsOpened())
- return false;
-
- if( src_pitch+32 > buffer_size )
- src = new uchar[src_pitch+32];
-
- if( m_width*3 + 32 > buffer_size )
- bgr = new uchar[m_width*3 + 32];
-
- if( !color && m_maptype == RMT_EQUAL_RGB )
- CvtPaletteToGray( m_palette, gray_palette, 1 << m_bpp );
-
- try
- {
- m_strm.SetPos( m_offset );
-
- switch( m_bpp )
- {
- /************************* 1 BPP ************************/
- case 1:
- for( y = 0; y < m_height; y++, data += step )
- {
- m_strm.GetBytes( src, src_pitch );
- FillColorRow1( color ? data : bgr, src, m_width, m_palette );
- if( !color ) CvtBGRToGray( bgr, data, m_width );
- }
- result = true;
- break;
- /************************* 8 BPP ************************/
- case 8:
- if( m_type != RT_BYTE_ENCODED )
- {
- for( y = 0; y < m_height; y++, data += step )
- {
- m_strm.GetBytes( src, src_pitch );
- if( color )
- FillColorRow8( data, src, m_width, m_palette );
- else
- FillGrayRow8( data, src, m_width, gray_palette );
- }
- result = true;
- }
- else // RLE-encoded
- {
- uchar* line_end = data + width3;
- y = 0;
-
- for(;;)
- {
- int max_count = line_end - data;
- int code = 0, len = 0, len1;
- uchar* tsrc = src;
-
- do
- {
- code = m_strm.GetByte();
- if( code == 0x80 )
- {
- len = m_strm.GetByte();
- if( len != 0 ) break;
- }
- *tsrc++ = (uchar)code;
- }
- while( (max_count -= nch) > 0 );
-
- len1 = tsrc - src;
-
- if( len1 > 0 )
- {
- if( color )
- FillColorRow8( data, src, len1, m_palette );
- else
- FillGrayRow8( data, src, len1, gray_palette );
- data += len1*nch;
- }
-
- if( len > 0 ) // encoded mode
- {
- int y_shift = 0;
- len = (len + 1)*nch;
- code = m_strm.GetByte();
-
- CalcShifts( data, line_end, width3, y, m_height, len, y_shift );
-
- data = FillUni( data, line_end, width3, delta,
- len, y_shift, m_palette[code], color );
- y += y_shift;
- line_end += y_shift*step;
- }
-
- if( data == line_end )
- {
- data += delta;
- line_end += step;
- if( ++y >= m_height ) break;
- }
- }
-
- result = true;
- }
- break;
- /************************* 24 BPP ************************/
- case 24:
- for( y = 0; y < m_height; y++, data += step )
- {
- m_strm.GetBytes( color ? data : bgr, src_pitch );
-
- if( color )
- {
- if( m_type == RT_FORMAT_RGB )
- CvtRGBToBGR( data, data, m_width );
- }
- else
- {
- if( m_type == RT_FORMAT_RGB )
- CvtRGBToGray( bgr, data, m_width );
- else
- CvtBGRToGray( bgr, data, m_width );
- }
- }
- result = true;
- break;
- /************************* 32 BPP ************************/
- case 32:
- for( y = 0; y < m_height; y++, data += step )
- {
- /* hack: a0 b0 g0 r0 a1 b1 g1 r1 ... are written to src + 3,
- so when we look at src + 4, we see b0 g0 r0 x b1 g1 g1 x ... */
- m_strm.GetBytes( src + 3, src_pitch );
- FillRow32( color ? data : bgr, src + 4, m_width );
-
- if( color )
- {
- if( m_type == RT_FORMAT_RGB )
- CvtRGBToBGR( data, data, m_width );
- }
- else
- {
- if( m_type == RT_FORMAT_RGB )
- CvtRGBToGray( bgr, data, m_width );
- else
- CvtBGRToGray( bgr, data, m_width );
- }
- }
- result = true;
- break;
- default:
- assert(0);
- }
- }
- catch( int )
- {
- }
-
- if( src != buffer ) delete src;
- if( bgr != bgr_buffer ) delete bgr;
-
- return true;
-}
projects / opencv / blobdiff