+++ /dev/null
-/*
- * grfmt_imageio.cpp
- *
- *
- * Created by Morgan Conbere on 5/17/07.
- *
- */
-
-#include "_highgui.h"
-
-#ifdef HAVE_IMAGEIO
-
-#include "grfmt_imageio.h"
-#include <iostream>
-
-// ImageIO filter factory
-
-GrFmtImageIO::GrFmtImageIO()
-{
- m_sign_len = 0;
- m_signature = NULL;
- m_description = "Apple ImageIO (*.bmp;*.dib;*.exr;*.jpeg;*.jpg;*.jpe;*.jp2;*.pdf;*.png;*.tiff;*.tif)";
-}
-
-
-GrFmtImageIO::~GrFmtImageIO()
-{
-}
-
-
-bool GrFmtImageIO::CheckFile( const char* filename )
-{
- if( !filename ) return false;
-
- // If a CFImageRef can be retrieved from an image file, it is
- // readable by ImageIO. Effectively this is using ImageIO
- // to check the signatures and determine the file format for us.
- CFURLRef imageURLRef = CFURLCreateFromFileSystemRepresentation( NULL,
- (const UInt8*)filename,
- strlen( filename ),
- false );
- if( !imageURLRef ) return false;
-
- CGImageSourceRef sourceRef = CGImageSourceCreateWithURL( imageURLRef, NULL );
- CFRelease( imageURLRef );
- if( !sourceRef ) return false;
-
- CGImageRef imageRef = CGImageSourceCreateImageAtIndex( sourceRef, 0, NULL );
- CFRelease( sourceRef );
- if( !imageRef ) return false;
-
- return true;
-}
-
-
-GrFmtReader* GrFmtImageIO::NewReader( const char* filename )
-{
- return new GrFmtImageIOReader( filename );
-}
-
-
-GrFmtWriter* GrFmtImageIO::NewWriter( const char* filename )
-{
- return new GrFmtImageIOWriter( filename );
-}
-
-
-/////////////////////// GrFmtImageIOReader ///////////////////
-
-GrFmtImageIOReader::GrFmtImageIOReader( const char* filename ) : GrFmtReader( filename )
-{
- // Nothing to do here
-}
-
-
-GrFmtImageIOReader::~GrFmtImageIOReader()
-{
- Close();
-}
-
-
-void GrFmtImageIOReader::Close()
-{
- CGImageRelease( imageRef );
-
- GrFmtReader::Close();
-}
-
-
-bool GrFmtImageIOReader::ReadHeader()
-{
- CFURLRef imageURLRef;
- CGImageSourceRef sourceRef;
- imageRef = NULL;
-
- imageURLRef = CFURLCreateFromFileSystemRepresentation( NULL,
- (const UInt8*)m_filename,
- strlen(m_filename),
- false );
-
- sourceRef = CGImageSourceCreateWithURL( imageURLRef, NULL );
- CFRelease( imageURLRef );
- if ( !sourceRef )
- return false;
-
- imageRef = CGImageSourceCreateImageAtIndex( sourceRef, 0, NULL );
- CFRelease( sourceRef );
- if( !imageRef )
- return false;
-
- m_width = CGImageGetWidth( imageRef );
- m_height = CGImageGetHeight( imageRef );
-
- CGColorSpaceRef colorSpace = CGImageGetColorSpace( imageRef );
- if( !colorSpace )
- return false;
-
- m_iscolor = ( CGColorSpaceGetNumberOfComponents( colorSpace ) > 1 );
-
- return true;
-}
-
-
-bool GrFmtImageIOReader::ReadData( uchar* data, int step, int color )
-{
- int bpp; // Bytes per pixel
-
- // Set color to either CV_IMAGE_LOAD_COLOR or CV_IMAGE_LOAD_GRAYSCALE if unchanged
- color = color > 0 || ( m_iscolor && color < 0 );
-
- // Get Height, Width, and color information
- if( !ReadHeader() )
- return false;
-
- CGContextRef context = NULL; // The bitmap context
- CGColorSpaceRef colorSpace = NULL;
- uchar* bitmap = NULL;
- CGImageAlphaInfo alphaInfo;
-
- // CoreGraphics will take care of converting to grayscale and back as long as the
- // appropriate colorspace is set
- if( color == CV_LOAD_IMAGE_GRAYSCALE )
- {
- colorSpace = CGColorSpaceCreateDeviceGray();
- bpp = 1;
- alphaInfo = kCGImageAlphaNone;
- }
- else if( color == CV_LOAD_IMAGE_COLOR )
- {
- colorSpace = CGColorSpaceCreateDeviceRGB();
- bpp = 4; /* CG only has 8 and 32 bit color spaces, so we waste a byte */
- alphaInfo = kCGImageAlphaNoneSkipLast;
- }
- if( !colorSpace )
- return false;
-
- bitmap = (uchar*)malloc( bpp * m_height * m_width );
- if( !bitmap )
- {
- CGColorSpaceRelease( colorSpace );
- return false;
- }
-
- context = CGBitmapContextCreate( (void *)bitmap,
- m_width, /* width */
- m_height, /* height */
- m_bit_depth, /* bit depth */
- bpp * m_width, /* bytes per row */
- colorSpace, /* color space */
- alphaInfo);
-
- CGColorSpaceRelease( colorSpace );
- if( !context )
- {
- free( bitmap );
- return false;
- }
-
- // Copy the image data into the bitmap region
- CGRect rect = {{0,0},{m_width,m_height}};
- CGContextDrawImage( context, rect, imageRef );
-
- uchar* bitdata = (uchar*)CGBitmapContextGetData( context );
- if( !bitdata )
- {
- free( bitmap);
- CGContextRelease( context );
- return false;
- }
-
- // Move the bitmap (in RGB) into data (in BGR)
- int dataIndex = 0;
- int bitmapIndex = 0;
-
- // We make the assumption that the step is the number of colors * the width
- assert( ( color ? 3 : 1 )*m_width == step );
-
- if( color == CV_LOAD_IMAGE_COLOR ) {
- for( int i = 0; i < m_width * m_height; ++i) {
- // Blue channel
- data[dataIndex + 0] = bitdata[bitmapIndex + 2];
- // Green channel
- data[dataIndex + 1] = bitdata[bitmapIndex + 1];
- // Red channel
- data[dataIndex + 2] = bitdata[bitmapIndex + 0];
-
- dataIndex += 3;
- bitmapIndex += bpp;
- }
- }
- else if( color == CV_LOAD_IMAGE_GRAYSCALE )
- {
- // the bitmap representation is exactly what we want in data
- memcpy( data, bitmap, m_width*m_height );
- }
-
- free( bitmap );
- CGContextRelease( context );
- return true;
-}
-
-
-/////////////////////// GrFmtImageIOWriter ///////////////////
-
-GrFmtImageIOWriter::GrFmtImageIOWriter( const char* filename ) : GrFmtWriter( filename )
-{
- // Nothing to do here
-}
-
-
-GrFmtImageIOWriter::~GrFmtImageIOWriter()
-{
- // Nothing to do here
-}
-
-
-static
-CFStringRef FilenameToUTI( const char* filename )
-{
- const char* ext = filename;
- for(;;)
- {
- const char* temp = strchr( ext + 1, '.' );
- if( !temp ) break;
- ext = temp;
- }
-
- CFStringRef imageUTI = NULL;
-
- if( !strcmp(ext, ".bmp") || !strcmp(ext, ".dib") )
- imageUTI = CFSTR( "com.microsoft.bmp" );
- else if( !strcmp(ext, ".exr") )
- imageUTI = CFSTR( "com.ilm.openexr-image" );
- else if( !strcmp(ext, ".jpeg") || !strcmp(ext, ".jpg") || !strcmp(ext, ".jpe") )
- imageUTI = CFSTR( "public.jpeg" );
- else if( !strcmp(ext, ".jp2") )
- imageUTI = CFSTR( "public.jpeg-2000" );
- else if( !strcmp(ext, ".pdf") )
- imageUTI = CFSTR( "com.adobe.pdf" );
- else if( !strcmp(ext, ".png") )
- imageUTI = CFSTR( "public.png" );
- else if( !strcmp(ext, ".tiff") || !strcmp(ext, ".tif") )
- imageUTI = CFSTR( "public.tiff" );
-
- return imageUTI;
-}
-
-
-bool GrFmtImageIOWriter::WriteImage( const uchar* data, int step,
- int width, int height, int /*depth*/, int _channels )
-{
- // Determine the appropriate UTI based on the filename extension
- CFStringRef imageUTI = FilenameToUTI( m_filename );
-
- // Determine the Bytes Per Pixel
- int bpp = (_channels == 1) ? 1 : 4;
-
- // Write the data into a bitmap context
- CGContextRef context;
- CGColorSpaceRef colorSpace;
- uchar* bitmapData = NULL;
-
- if( bpp == 1 )
- colorSpace = CGColorSpaceCreateWithName( kCGColorSpaceGenericGray );
- else if( bpp == 4 )
- colorSpace = CGColorSpaceCreateWithName( kCGColorSpaceGenericRGB );
- if( !colorSpace )
- return false;
-
- bitmapData = (uchar*)malloc( bpp * height * width );
- if( !bitmapData )
- {
- CGColorSpaceRelease( colorSpace );
- return false;
- }
-
- context = CGBitmapContextCreate( bitmapData,
- width,
- height,
- 8,
- bpp * width,
- colorSpace,
- (bpp == 1) ? kCGImageAlphaNone :
- kCGImageAlphaNoneSkipLast );
- CGColorSpaceRelease( colorSpace );
- if( !context )
- {
- free( bitmapData );
- return false;
- }
-
- // Copy pixel information from data into bitmapData
- if( bpp == 4 )
- {
- int dataIndex = 0;
- int bitmapIndex = 0;
- for( int i = 0; i < width * height; ++i)
- {
- // Blue channel
- bitmapData[bitmapIndex + 2] = data[dataIndex + 0];
- // Green channel
- bitmapData[bitmapIndex + 1] = data[dataIndex + 1];
- // Red channel
- bitmapData[bitmapIndex + 0] = data[dataIndex + 2];
-
- dataIndex += 3;
- bitmapIndex += bpp;
- }
- }
- else if( bpp == 1 )
- {
- // the bitmap representation is exactly what we want in data
- memcpy( bitmapData, data, width * height );
- }
-
- // Turn the bitmap context into an imageRef
- CGImageRef imageRef = CGBitmapContextCreateImage( context );
- CGContextRelease( context );
- if( !imageRef )
- {
- free( bitmapData );
- return false;
- }
-
- // Write the imageRef to a file based on the UTI
- CFURLRef imageURLRef = CFURLCreateFromFileSystemRepresentation( NULL,
- (const UInt8*)m_filename,
- strlen(m_filename),
- false );
- if( !imageURLRef )
- {
- CGImageRelease( imageRef );
- free( bitmapData );
- return false;
- }
-
- CGImageDestinationRef destRef = CGImageDestinationCreateWithURL( imageURLRef,
- imageUTI,
- 1,
- NULL);
- CFRelease( imageURLRef );
- if( !destRef )
- {
- CGImageRelease( imageRef );
- free( bitmapData );
- std::cerr << "!destRef" << std::endl << std::flush;
- return false;
- }
-
- CGImageDestinationAddImage(destRef, imageRef, NULL);
- if( !CGImageDestinationFinalize(destRef) )
- {
- std::cerr << "Finalize failed" << std::endl << std::flush;
- return false;
- }
-
- CFRelease( destRef );
- CGImageRelease( imageRef );
- free( bitmapData );
-
- return true;
-}
-
-#endif /* HAVE_IMAGEIO */
projects / opencv / blobdiff