/////////////////////////////////////////////////////////////////////////////
-// Name: image.cpp
+// Name: src/common/image.cpp
// Purpose: wxImage
// Author: Robert Roebling
// RCS-ID: $Id$
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "image.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#pragma hdrstop
#endif
+#if wxUSE_IMAGE
+
#include "wx/image.h"
-#include "wx/bitmap.h"
-#include "wx/debug.h"
-#include "wx/log.h"
-#include "wx/app.h"
+
+#ifndef WX_PRECOMP
+ #include "wx/log.h"
+ #include "wx/hash.h"
+ #include "wx/utils.h"
+ #include "wx/math.h"
+ #include "wx/module.h"
+ #include "wx/palette.h"
+ #include "wx/intl.h"
+#endif
+
#include "wx/filefn.h"
#include "wx/wfstream.h"
-#include "wx/intl.h"
-#include "wx/module.h"
+#include "wx/xpmdecod.h"
// For memcpy
#include <string.h>
-#ifdef __SALFORDC__
- #undef FAR
-#endif
-
-#ifdef __WXMSW__
- #include "wx/msw/private.h"
+// make the code compile with either wxFile*Stream or wxFFile*Stream:
+#define HAS_FILE_STREAMS (wxUSE_STREAMS && (wxUSE_FILE || wxUSE_FFILE))
+
+#if HAS_FILE_STREAMS
+ #if wxUSE_FILE
+ typedef wxFileInputStream wxImageFileInputStream;
+ typedef wxFileOutputStream wxImageFileOutputStream;
+ #elif wxUSE_FFILE
+ typedef wxFFileInputStream wxImageFileInputStream;
+ typedef wxFFileOutputStream wxImageFileOutputStream;
+ #endif // wxUSE_FILE/wxUSE_FFILE
+#endif // HAS_FILE_STREAMS
+
+#if wxUSE_VARIANT
+IMPLEMENT_VARIANT_OBJECT_EXPORTED(wxImage,WXDLLEXPORT)
#endif
//-----------------------------------------------------------------------------
class wxImageRefData: public wxObjectRefData
{
-
public:
wxImageRefData();
- ~wxImageRefData();
+ virtual ~wxImageRefData();
int m_width;
int m_height;
unsigned char *m_data;
+
bool m_hasMask;
unsigned char m_maskRed,m_maskGreen,m_maskBlue;
+
+ // alpha channel data, may be NULL for the formats without alpha support
+ unsigned char *m_alpha;
+
bool m_ok;
+
+ // if true, m_data is pointer to static data and shouldn't be freed
+ bool m_static;
+
+ // same as m_static but for m_alpha
+ bool m_staticAlpha;
+
+#if wxUSE_PALETTE
+ wxPalette m_palette;
+#endif // wxUSE_PALETTE
+
+ wxArrayString m_optionNames;
+ wxArrayString m_optionValues;
+
+ DECLARE_NO_COPY_CLASS(wxImageRefData)
};
wxImageRefData::wxImageRefData()
{
m_width = 0;
m_height = 0;
- m_data = (unsigned char*) NULL;
- m_ok = FALSE;
+ m_data =
+ m_alpha = (unsigned char *) NULL;
+
m_maskRed = 0;
m_maskGreen = 0;
m_maskBlue = 0;
- m_hasMask = FALSE;
+ m_hasMask = false;
+
+ m_ok = false;
+ m_static =
+ m_staticAlpha = false;
}
wxImageRefData::~wxImageRefData()
{
- if (m_data) free( m_data );
+ if ( !m_static )
+ free( m_data );
+ if ( !m_staticAlpha )
+ free( m_alpha );
}
wxList wxImage::sm_handlers;
+wxImage wxNullImage;
+
//-----------------------------------------------------------------------------
-#define M_IMGDATA ((wxImageRefData *)m_refData)
+#define M_IMGDATA wx_static_cast(wxImageRefData*, m_refData)
-#if !USE_SHARED_LIBRARIES
- IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
-#endif
+IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
+
+wxImage::wxImage( int width, int height, bool clear )
+{
+ Create( width, height, clear );
+}
-wxImage::wxImage()
+wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
{
+ Create( width, height, data, static_data );
}
-wxImage::wxImage( int width, int height )
+wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
{
- Create( width, height );
+ Create( width, height, data, alpha, static_data );
}
-wxImage::wxImage( const wxString& name, long type )
+wxImage::wxImage( const wxString& name, long type, int index )
{
- LoadFile( name, type );
+ LoadFile( name, type, index );
}
-wxImage::wxImage( const wxString& name, const wxString& mimetype )
+wxImage::wxImage( const wxString& name, const wxString& mimetype, int index )
{
- LoadFile( name, mimetype );
+ LoadFile( name, mimetype, index );
}
#if wxUSE_STREAMS
-wxImage::wxImage( wxInputStream& stream, long type )
+wxImage::wxImage( wxInputStream& stream, long type, int index )
{
- LoadFile( stream, type );
+ LoadFile( stream, type, index );
}
-wxImage::wxImage( wxInputStream& stream, const wxString& mimetype )
+wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index )
{
- LoadFile( stream, mimetype );
+ LoadFile( stream, mimetype, index );
}
#endif // wxUSE_STREAMS
-wxImage::wxImage( const wxImage& image )
+wxImage::wxImage(const char* const* xpmData)
{
- Ref(image);
+ Create(xpmData);
}
-wxImage::wxImage( const wxImage* image )
+bool wxImage::Create(const char* const* xpmData)
{
- if (image) Ref(*image);
+#if wxUSE_XPM
+ UnRef();
+
+ wxXPMDecoder decoder;
+ (*this) = decoder.ReadData(xpmData);
+ return Ok();
+#else
+ return false;
+#endif
}
-void wxImage::Create( int width, int height )
+bool wxImage::Create( int width, int height, bool clear )
{
+ UnRef();
+
m_refData = new wxImageRefData();
M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
- if (M_IMGDATA->m_data)
- {
- for (int l = 0; l < width*height*3; l++) M_IMGDATA->m_data[l] = 0;
-
- M_IMGDATA->m_width = width;
- M_IMGDATA->m_height = height;
- M_IMGDATA->m_ok = TRUE;
- }
- else
+ if (!M_IMGDATA->m_data)
{
UnRef();
+ return false;
}
+
+ if (clear)
+ memset(M_IMGDATA->m_data, 0, width*height*3);
+
+ M_IMGDATA->m_width = width;
+ M_IMGDATA->m_height = height;
+ M_IMGDATA->m_ok = true;
+
+ return true;
}
-void wxImage::Destroy()
+bool wxImage::Create( int width, int height, unsigned char* data, bool static_data )
{
UnRef();
+
+ wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
+
+ m_refData = new wxImageRefData();
+
+ M_IMGDATA->m_data = data;
+ M_IMGDATA->m_width = width;
+ M_IMGDATA->m_height = height;
+ M_IMGDATA->m_ok = true;
+ M_IMGDATA->m_static = static_data;
+
+ return true;
}
-wxImage wxImage::Scale( int width, int height ) const
+bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
{
- wxImage image;
+ UnRef();
- wxCHECK_MSG( Ok(), image, _T("invalid image") );
+ wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
- wxCHECK_MSG( (width > 0) && (height > 0), image, _T("invalid image size") );
+ m_refData = new wxImageRefData();
- image.Create( width, height );
+ M_IMGDATA->m_data = data;
+ M_IMGDATA->m_alpha = alpha;
+ M_IMGDATA->m_width = width;
+ M_IMGDATA->m_height = height;
+ M_IMGDATA->m_ok = true;
+ M_IMGDATA->m_static = static_data;
- char unsigned *data = image.GetData();
+ return true;
+}
- wxCHECK_MSG( data, image, _T("unable to create image") );
+void wxImage::Destroy()
+{
+ UnRef();
+}
- if (M_IMGDATA->m_hasMask)
- image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+wxObjectRefData* wxImage::CreateRefData() const
+{
+ return new wxImageRefData;
+}
- long old_height = M_IMGDATA->m_height;
- long old_width = M_IMGDATA->m_width;
+wxObjectRefData* wxImage::CloneRefData(const wxObjectRefData* that) const
+{
+ const wxImageRefData* refData = wx_static_cast(const wxImageRefData*, that);
+ wxCHECK_MSG(refData->m_ok, NULL, wxT("invalid image") );
+
+ wxImageRefData* refData_new = new wxImageRefData;
+ refData_new->m_width = refData->m_width;
+ refData_new->m_height = refData->m_height;
+ refData_new->m_maskRed = refData->m_maskRed;
+ refData_new->m_maskGreen = refData->m_maskGreen;
+ refData_new->m_maskBlue = refData->m_maskBlue;
+ refData_new->m_hasMask = refData->m_hasMask;
+ refData_new->m_ok = true;
+ unsigned size = unsigned(refData->m_width) * unsigned(refData->m_height);
+ if (refData->m_alpha != NULL)
+ {
+ refData_new->m_alpha = (unsigned char*)malloc(size);
+ memcpy(refData_new->m_alpha, refData->m_alpha, size);
+ }
+ size *= 3;
+ refData_new->m_data = (unsigned char*)malloc(size);
+ memcpy(refData_new->m_data, refData->m_data, size);
+#if wxUSE_PALETTE
+ refData_new->m_palette = refData->m_palette;
+#endif
+ refData_new->m_optionNames = refData->m_optionNames;
+ refData_new->m_optionValues = refData->m_optionValues;
+ return refData_new;
+}
- char unsigned *source_data = M_IMGDATA->m_data;
- char unsigned *target_data = data;
+wxImage wxImage::Copy() const
+{
+ wxImage image;
- for (long j = 0; j < height; j++)
- {
- long y_offset = (j * old_height / height) * old_width;
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- for (long i = 0; i < width; i++)
- {
- memcpy( target_data,
- source_data + 3*(y_offset + ((i * old_width )/ width)),
- 3 );
- target_data += 3;
- }
- }
+ image.m_refData = CloneRefData(m_refData);
return image;
}
-void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
+wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
{
- wxCHECK_RET( Ok(), _T("invalid image") );
+ if( xFactor == 1 && yFactor == 1 )
+ return *this;
- int w = M_IMGDATA->m_width;
- int h = M_IMGDATA->m_height;
+ wxImage image;
- wxCHECK_RET( (x>=0) && (y>=0) && (x<w) && (y<h), _T("invalid image index") );
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- long pos = (y * w + x) * 3;
+ // can't scale to/from 0 size
+ wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image,
+ wxT("invalid new image size") );
- M_IMGDATA->m_data[ pos ] = r;
- M_IMGDATA->m_data[ pos+1 ] = g;
- M_IMGDATA->m_data[ pos+2 ] = b;
-}
+ long old_height = M_IMGDATA->m_height,
+ old_width = M_IMGDATA->m_width;
-unsigned char wxImage::GetRed( int x, int y )
-{
- wxCHECK_MSG( Ok(), 0, _T("invalid image") );
+ wxCHECK_MSG( (old_height > 0) && (old_width > 0), image,
+ wxT("invalid old image size") );
- int w = M_IMGDATA->m_width;
- int h = M_IMGDATA->m_height;
+ long width = old_width / xFactor ;
+ long height = old_height / yFactor ;
- wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, _T("invalid image index") );
+ image.Create( width, height, false );
- long pos = (y * w + x) * 3;
+ char unsigned *data = image.GetData();
- return M_IMGDATA->m_data[pos];
-}
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
-unsigned char wxImage::GetGreen( int x, int y )
-{
- wxCHECK_MSG( Ok(), 0, _T("invalid image") );
+ bool hasMask = false ;
+ unsigned char maskRed = 0;
+ unsigned char maskGreen = 0;
+ unsigned char maskBlue =0 ;
- int w = M_IMGDATA->m_width;
- int h = M_IMGDATA->m_height;
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data = data;
+ unsigned char *source_alpha = 0 ;
+ unsigned char *target_alpha = 0 ;
+ if (M_IMGDATA->m_hasMask)
+ {
+ hasMask = true ;
+ maskRed = M_IMGDATA->m_maskRed;
+ maskGreen = M_IMGDATA->m_maskGreen;
+ maskBlue =M_IMGDATA->m_maskBlue ;
+
+ image.SetMaskColour( M_IMGDATA->m_maskRed,
+ M_IMGDATA->m_maskGreen,
+ M_IMGDATA->m_maskBlue );
+ }
+ else
+ {
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ target_alpha = image.GetAlpha() ;
+ }
+ }
- wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, _T("invalid image index") );
+ for (long y = 0; y < height; y++)
+ {
+ for (long x = 0; x < width; x++)
+ {
+ unsigned long avgRed = 0 ;
+ unsigned long avgGreen = 0;
+ unsigned long avgBlue = 0;
+ unsigned long avgAlpha = 0 ;
+ unsigned long counter = 0 ;
+ // determine average
+ for ( int y1 = 0 ; y1 < yFactor ; ++y1 )
+ {
+ long y_offset = (y * yFactor + y1) * old_width;
+ for ( int x1 = 0 ; x1 < xFactor ; ++x1 )
+ {
+ unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ;
+ unsigned char red = pixel[0] ;
+ unsigned char green = pixel[1] ;
+ unsigned char blue = pixel[2] ;
+ unsigned char alpha = 255 ;
+ if ( source_alpha )
+ alpha = *(source_alpha + y_offset + x * xFactor + x1) ;
+ if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue )
+ {
+ if ( alpha > 0 )
+ {
+ avgRed += red ;
+ avgGreen += green ;
+ avgBlue += blue ;
+ }
+ avgAlpha += alpha ;
+ counter++ ;
+ }
+ }
+ }
+ if ( counter == 0 )
+ {
+ *(target_data++) = M_IMGDATA->m_maskRed ;
+ *(target_data++) = M_IMGDATA->m_maskGreen ;
+ *(target_data++) = M_IMGDATA->m_maskBlue ;
+ }
+ else
+ {
+ if ( source_alpha )
+ *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ;
+ *(target_data++) = (unsigned char)(avgRed / counter);
+ *(target_data++) = (unsigned char)(avgGreen / counter);
+ *(target_data++) = (unsigned char)(avgBlue / counter);
+ }
+ }
+ }
- long pos = (y * w + x) * 3;
+ // In case this is a cursor, make sure the hotspot is scaled accordingly:
+ if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
+ (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X))/xFactor);
+ if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
+ (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y))/yFactor);
- return M_IMGDATA->m_data[pos+1];
+ return image;
}
-unsigned char wxImage::GetBlue( int x, int y )
+wxImage wxImage::Scale( int width, int height, int quality ) const
{
- wxCHECK_MSG( Ok(), 0, _T("invalid image") );
+ wxImage image;
- int w = M_IMGDATA->m_width;
- int h = M_IMGDATA->m_height;
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, _T("invalid image index") );
+ // can't scale to/from 0 size
+ wxCHECK_MSG( (width > 0) && (height > 0), image,
+ wxT("invalid new image size") );
- long pos = (y * w + x) * 3;
+ long old_height = M_IMGDATA->m_height,
+ old_width = M_IMGDATA->m_width;
+ wxCHECK_MSG( (old_height > 0) && (old_width > 0), image,
+ wxT("invalid old image size") );
- return M_IMGDATA->m_data[pos+2];
-}
+ // If the image's new width and height are the same as the original, no
+ // need to waste time or CPU cycles
+ if ( old_width == width && old_height == height )
+ return *this;
-bool wxImage::Ok() const
-{
- return (M_IMGDATA && M_IMGDATA->m_ok);
-}
+ // Scale the image (...or more appropriately, resample the image) using
+ // either the high-quality or normal method as specified
+ if ( quality == wxIMAGE_QUALITY_HIGH )
+ {
+ // We need to check whether we are downsampling or upsampling the image
+ if ( width < old_width && height < old_height )
+ {
+ // Downsample the image using the box averaging method for best results
+ image = ResampleBox(width, height);
+ }
+ else
+ {
+ // For upsampling or other random/wierd image dimensions we'll use
+ // a bicubic b-spline scaling method
+ image = ResampleBicubic(width, height);
+ }
+ }
+ else // Default scaling method == simple pixel replication
+ {
+ if ( old_width % width == 0 && old_width >= width &&
+ old_height % height == 0 && old_height >= height )
+ {
+ return ShrinkBy( old_width / width , old_height / height ) ;
+ }
+ image.Create( width, height, false );
-char unsigned *wxImage::GetData() const
-{
- wxCHECK_MSG( Ok(), (char unsigned *)NULL, _T("invalid image") );
+ unsigned char *data = image.GetData();
- return M_IMGDATA->m_data;
-}
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
-void wxImage::SetData( char unsigned *data )
-{
- wxCHECK_RET( Ok(), _T("invalid image") );
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data = data;
+ unsigned char *source_alpha = 0 ;
+ unsigned char *target_alpha = 0 ;
- memcpy(M_IMGDATA->m_data, data, M_IMGDATA->m_width * M_IMGDATA->m_height * 3);
-}
+ if ( !M_IMGDATA->m_hasMask )
+ {
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ target_alpha = image.GetAlpha() ;
+ }
+ }
-void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
-{
- wxCHECK_RET( Ok(), _T("invalid image") );
+ long x_delta = (old_width<<16) / width;
+ long y_delta = (old_height<<16) / height;
- M_IMGDATA->m_maskRed = r;
- M_IMGDATA->m_maskGreen = g;
- M_IMGDATA->m_maskBlue = b;
- M_IMGDATA->m_hasMask = TRUE;
-}
+ unsigned char* dest_pixel = target_data;
-unsigned char wxImage::GetMaskRed() const
-{
- wxCHECK_MSG( Ok(), 0, _T("invalid image") );
+ long y = 0;
+ for ( long j = 0; j < height; j++ )
+ {
+ unsigned char* src_line = &source_data[(y>>16)*old_width*3];
+ unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ;
- return M_IMGDATA->m_maskRed;
-}
+ long x = 0;
+ for ( long i = 0; i < width; i++ )
+ {
+ unsigned char* src_pixel = &src_line[(x>>16)*3];
+ unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ;
+ dest_pixel[0] = src_pixel[0];
+ dest_pixel[1] = src_pixel[1];
+ dest_pixel[2] = src_pixel[2];
+ dest_pixel += 3;
+ if ( source_alpha )
+ *(target_alpha++) = *src_alpha_pixel ;
+ x += x_delta;
+ }
-unsigned char wxImage::GetMaskGreen() const
-{
- wxCHECK_MSG( Ok(), 0, _T("invalid image") );
+ y += y_delta;
+ }
+ }
- return M_IMGDATA->m_maskGreen;
-}
+ // If the original image has a mask, apply the mask to the new image
+ if (M_IMGDATA->m_hasMask)
+ {
+ image.SetMaskColour( M_IMGDATA->m_maskRed,
+ M_IMGDATA->m_maskGreen,
+ M_IMGDATA->m_maskBlue );
+ }
-unsigned char wxImage::GetMaskBlue() const
-{
- wxCHECK_MSG( Ok(), 0, _T("invalid image") );
+ // In case this is a cursor, make sure the hotspot is scaled accordingly:
+ if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
+ (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)*width)/old_width);
+ if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
+ image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
+ (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y)*height)/old_height);
- return M_IMGDATA->m_maskBlue;
+ return image;
}
-void wxImage::SetMask( bool mask )
+wxImage wxImage::ResampleBox(int width, int height) const
{
- wxCHECK_RET( Ok(), _T("invalid image") );
+ // This function implements a simple pre-blur/box averaging method for
+ // downsampling that gives reasonably smooth results To scale the image
+ // down we will need to gather a grid of pixels of the size of the scale
+ // factor in each direction and then do an averaging of the pixels.
- M_IMGDATA->m_hasMask = mask;
-}
+ wxImage ret_image(width, height, false);
-bool wxImage::HasMask() const
-{
- wxCHECK_MSG( Ok(), FALSE, _T("invalid image") );
+ const double scale_factor_x = double(M_IMGDATA->m_width) / width;
+ const double scale_factor_y = double(M_IMGDATA->m_height) / height;
- return M_IMGDATA->m_hasMask;
-}
+ const int scale_factor_x_2 = (int)(scale_factor_x / 2);
+ const int scale_factor_y_2 = (int)(scale_factor_y / 2);
-int wxImage::GetWidth() const
-{
- wxCHECK_MSG( Ok(), 0, _T("invalid image") );
+ // If we want good-looking results we need to pre-blur the image a bit first
+ wxImage src_image(*this);
+ src_image = src_image.BlurHorizontal(scale_factor_x_2);
+ src_image = src_image.BlurVertical(scale_factor_y_2);
- return M_IMGDATA->m_width;
-}
+ unsigned char* src_data = src_image.GetData();
+ unsigned char* src_alpha = src_image.GetAlpha();
+ unsigned char* dst_data = ret_image.GetData();
+ unsigned char* dst_alpha = NULL;
-int wxImage::GetHeight() const
-{
- wxCHECK_MSG( Ok(), 0, _T("invalid image") );
+ if ( src_alpha )
+ {
+ ret_image.SetAlpha();
+ dst_alpha = ret_image.GetAlpha();
+ }
- return M_IMGDATA->m_height;
-}
+ int averaged_pixels, src_pixel_index;
+ double sum_r, sum_g, sum_b, sum_a;
-bool wxImage::LoadFile( const wxString& filename, long type )
-{
-#if wxUSE_STREAMS
- if (wxFileExists(filename))
+ for ( int y = 0; y < height; y++ ) // Destination image - Y direction
{
- wxFileInputStream stream(filename);
- return LoadFile(stream, type);
- }
+ // Source pixel in the Y direction
+ int src_y = (int)(y * scale_factor_y);
- else {
- wxLogError( _T("Can't load image from file '%s': file does not exist."), filename.c_str() );
+ for ( int x = 0; x < width; x++ ) // Destination image - X direction
+ {
+ // Source pixel in the X direction
+ int src_x = (int)(x * scale_factor_x);
- return FALSE;
- }
-#else // !wxUSE_STREAMS
- return FALSE;
-#endif // wxUSE_STREAMS
-}
+ // Box of pixels to average
+ averaged_pixels = 0;
+ sum_r = sum_g = sum_b = sum_a = 0.0;
-bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype )
-{
-#if wxUSE_STREAMS
- if (wxFileExists(filename))
- {
- wxFileInputStream stream(filename);
- return LoadFile(stream, mimetype);
- }
+ for ( int j = int(src_y - scale_factor_y/2.0 + 1);
+ j <= int(src_y + scale_factor_y_2);
+ j++ )
+ {
+ // We don't care to average pixels that don't exist (edges)
+ if ( j < 0 || j > M_IMGDATA->m_height )
+ continue;
+
+ for ( int i = int(src_x - scale_factor_x/2.0 + 1);
+ i <= src_x + scale_factor_x_2;
+ i++ )
+ {
+ // Don't average edge pixels
+ if ( i < 0 || i > M_IMGDATA->m_width )
+ continue;
- else {
- wxLogError( _T("Can't load image from file '%s': file does not exist."), filename.c_str() );
+ // Calculate the actual index in our source pixels
+ src_pixel_index = src_y * M_IMGDATA->m_width + src_x;
+
+ sum_r += src_data[src_pixel_index * 3 + 0];
+ sum_g += src_data[src_pixel_index * 3 + 1];
+ sum_b += src_data[src_pixel_index * 3 + 2];
+ if ( src_alpha )
+ sum_a += src_alpha[src_pixel_index];
+
+ averaged_pixels++;
+ }
+ }
- return FALSE;
+ // Calculate the average from the sum and number of averaged pixels
+ dst_data[0] = (unsigned char)(sum_r / averaged_pixels);
+ dst_data[1] = (unsigned char)(sum_g / averaged_pixels);
+ dst_data[2] = (unsigned char)(sum_b / averaged_pixels);
+ dst_data += 3;
+ if ( src_alpha )
+ *dst_alpha++ = (unsigned char)(sum_a / averaged_pixels);
+ }
}
-#else // !wxUSE_STREAMS
- return FALSE;
-#endif // wxUSE_STREAMS
+
+ return ret_image;
}
-bool wxImage::SaveFile( const wxString& filename, int type )
+// The following two local functions are for the B-spline weighting of the
+// bicubic sampling algorithm
+static inline double spline_cube(double value)
{
-#if wxUSE_STREAMS
- wxFileOutputStream stream(filename);
-
- if ( stream.LastError() == wxStream_NOERROR )
- return SaveFile(stream, type);
- else
-#endif // wxUSE_STREAMS
- return FALSE;
+ return value <= 0.0 ? 0.0 : value * value * value;
}
-bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype )
+static inline double spline_weight(double value)
{
-#if wxUSE_STREAMS
- wxFileOutputStream stream(filename);
-
- if ( stream.LastError() == wxStream_NOERROR )
- return SaveFile(stream, mimetype);
- else
-#endif // wxUSE_STREAMS
- return FALSE;
+ return (spline_cube(value + 2) -
+ 4 * spline_cube(value + 1) +
+ 6 * spline_cube(value) -
+ 4 * spline_cube(value - 1)) / 6;
}
-#if wxUSE_STREAMS
-bool wxImage::LoadFile( wxInputStream& stream, long type )
+// This is the bicubic resampling algorithm
+wxImage wxImage::ResampleBicubic(int width, int height) const
{
- UnRef();
-
- m_refData = new wxImageRefData;
-
- wxImageHandler *handler = FindHandler(type);
-
- if (handler == NULL)
+ // This function implements a Bicubic B-Spline algorithm for resampling.
+ // This method is certainly a little slower than wxImage's default pixel
+ // replication method, however for most reasonably sized images not being
+ // upsampled too much on a fairly average CPU this difference is hardly
+ // noticeable and the results are far more pleasing to look at.
+ //
+ // This particular bicubic algorithm does pixel weighting according to a
+ // B-Spline that basically implements a Gaussian bell-like weighting
+ // kernel. Because of this method the results may appear a bit blurry when
+ // upsampling by large factors. This is basically because a slight
+ // gaussian blur is being performed to get the smooth look of the upsampled
+ // image.
+
+ // Edge pixels: 3-4 possible solutions
+ // - (Wrap/tile) Wrap the image, take the color value from the opposite
+ // side of the image.
+ // - (Mirror) Duplicate edge pixels, so that pixel at coordinate (2, n),
+ // where n is nonpositive, will have the value of (2, 1).
+ // - (Ignore) Simply ignore the edge pixels and apply the kernel only to
+ // pixels which do have all neighbours.
+ // - (Clamp) Choose the nearest pixel along the border. This takes the
+ // border pixels and extends them out to infinity.
+ //
+ // NOTE: below the y_offset and x_offset variables are being set for edge
+ // pixels using the "Mirror" method mentioned above
+
+ wxImage ret_image;
+
+ ret_image.Create(width, height, false);
+
+ unsigned char* src_data = M_IMGDATA->m_data;
+ unsigned char* src_alpha = M_IMGDATA->m_alpha;
+ unsigned char* dst_data = ret_image.GetData();
+ unsigned char* dst_alpha = NULL;
+
+ if ( src_alpha )
{
- wxLogWarning( _T("No image handler for type %d defined."), type );
-
- return FALSE;
+ ret_image.SetAlpha();
+ dst_alpha = ret_image.GetAlpha();
}
- return handler->LoadFile( this, stream );
-}
+ for ( int dsty = 0; dsty < height; dsty++ )
+ {
+ // We need to calculate the source pixel to interpolate from - Y-axis
+ double srcpixy = dsty * M_IMGDATA->m_height / height;
+ double dy = srcpixy - (int)srcpixy;
-bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype )
-{
- UnRef();
+ for ( int dstx = 0; dstx < width; dstx++ )
+ {
+ // X-axis of pixel to interpolate from
+ double srcpixx = dstx * M_IMGDATA->m_width / width;
+ double dx = srcpixx - (int)srcpixx;
- m_refData = new wxImageRefData;
+ // Sums for each color channel
+ double sum_r = 0, sum_g = 0, sum_b = 0, sum_a = 0;
- wxImageHandler *handler = FindHandlerMime(mimetype);
+ // Here we actually determine the RGBA values for the destination pixel
+ for ( int k = -1; k <= 2; k++ )
+ {
+ // Y offset
+ int y_offset = srcpixy + k < 0.0
+ ? 0
+ : srcpixy + k >= M_IMGDATA->m_height
+ ? M_IMGDATA->m_height - 1
+ : (int)(srcpixy + k);
+
+ // Loop across the X axis
+ for ( int i = -1; i <= 2; i++ )
+ {
+ // X offset
+ int x_offset = srcpixx + i < 0.0
+ ? 0
+ : srcpixx + i >= M_IMGDATA->m_width
+ ? M_IMGDATA->m_width - 1
+ : (int)(srcpixx + i);
+
+ // Calculate the exact position where the source data
+ // should be pulled from based on the x_offset and y_offset
+ int src_pixel_index = y_offset*M_IMGDATA->m_width + x_offset;
+
+ // Calculate the weight for the specified pixel according
+ // to the bicubic b-spline kernel we're using for
+ // interpolation
+ double
+ pixel_weight = spline_weight(i - dx)*spline_weight(k - dy);
+
+ // Create a sum of all velues for each color channel
+ // adjusted for the pixel's calculated weight
+ sum_r += src_data[src_pixel_index * 3 + 0] * pixel_weight;
+ sum_g += src_data[src_pixel_index * 3 + 1] * pixel_weight;
+ sum_b += src_data[src_pixel_index * 3 + 2] * pixel_weight;
+ if ( src_alpha )
+ sum_a += src_alpha[src_pixel_index] * pixel_weight;
+ }
+ }
- if (handler == NULL)
- {
- wxLogWarning( _T("No image handler for type %s defined."), mimetype.GetData() );
+ // Put the data into the destination image. The summed values are
+ // of double data type and are rounded here for accuracy
+ dst_data[0] = (unsigned char)(sum_r + 0.5);
+ dst_data[1] = (unsigned char)(sum_g + 0.5);
+ dst_data[2] = (unsigned char)(sum_b + 0.5);
+ dst_data += 3;
- return FALSE;
+ if ( src_alpha )
+ *dst_alpha++ = (unsigned char)sum_a;
+ }
}
- return handler->LoadFile( this, stream );
+ return ret_image;
}
-bool wxImage::SaveFile( wxOutputStream& stream, int type )
+// Blur in the horizontal direction
+wxImage wxImage::BlurHorizontal(int blurRadius)
{
- wxCHECK_MSG( Ok(), FALSE, _T("invalid image") );
+ wxImage ret_image;
+ ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
- wxImageHandler *handler = FindHandler(type);
+ unsigned char* src_data = M_IMGDATA->m_data;
+ unsigned char* dst_data = ret_image.GetData();
+ unsigned char* src_alpha = M_IMGDATA->m_alpha;
+ unsigned char* dst_alpha = NULL;
- if (handler == NULL)
+ // Check for a mask or alpha
+ if ( M_IMGDATA->m_hasMask )
{
- wxLogWarning( _T("No image handler for type %d defined."), type );
-
- return FALSE;
+ ret_image.SetMaskColour(M_IMGDATA->m_maskRed,
+ M_IMGDATA->m_maskGreen,
+ M_IMGDATA->m_maskBlue);
+ }
+ else
+ {
+ if ( src_alpha )
+ {
+ ret_image.SetAlpha();
+ dst_alpha = ret_image.GetAlpha();
+ }
}
- return handler->SaveFile( this, stream );
-}
-
-bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype )
-{
- wxCHECK_MSG( Ok(), FALSE, _T("invalid image") );
-
- wxImageHandler *handler = FindHandlerMime(mimetype);
+ // number of pixels we average over
+ const int blurArea = blurRadius*2 + 1;
- if (handler == NULL)
+ // Horizontal blurring algorithm - average all pixels in the specified blur
+ // radius in the X or horizontal direction
+ for ( int y = 0; y < M_IMGDATA->m_height; y++ )
{
- wxLogWarning( _T("No image handler for type %s defined."), mimetype.GetData() );
-
- return FALSE;
- }
+ // Variables used in the blurring algorithm
+ long sum_r = 0,
+ sum_g = 0,
+ sum_b = 0,
+ sum_a = 0;
+
+ long pixel_idx;
+ const unsigned char *src;
+ unsigned char *dst;
+
+ // Calculate the average of all pixels in the blur radius for the first
+ // pixel of the row
+ for ( int kernel_x = -blurRadius; kernel_x <= blurRadius; kernel_x++ )
+ {
+ // To deal with the pixels at the start of a row so it's not
+ // grabbing GOK values from memory at negative indices of the
+ // image's data or grabbing from the previous row
+ if ( kernel_x < 0 )
+ pixel_idx = y * M_IMGDATA->m_width;
+ else
+ pixel_idx = kernel_x + y * M_IMGDATA->m_width;
+
+ src = src_data + pixel_idx*3;
+ sum_r += src[0];
+ sum_g += src[1];
+ sum_b += src[2];
+ if ( src_alpha )
+ sum_a += src_alpha[pixel_idx];
+ }
- return handler->SaveFile( this, stream );
-}
-#endif // wxUSE_STREAMS
+ dst = dst_data + y * M_IMGDATA->m_width*3;
+ dst[0] = (unsigned char)(sum_r / blurArea);
+ dst[1] = (unsigned char)(sum_g / blurArea);
+ dst[2] = (unsigned char)(sum_b / blurArea);
+ if ( src_alpha )
+ dst_alpha[y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea);
-void wxImage::AddHandler( wxImageHandler *handler )
-{
- // make sure that the memory will be freed at the program end
- sm_handlers.DeleteContents(TRUE);
+ // Now average the values of the rest of the pixels by just moving the
+ // blur radius box along the row
+ for ( int x = 1; x < M_IMGDATA->m_width; x++ )
+ {
+ // Take care of edge pixels on the left edge by essentially
+ // duplicating the edge pixel
+ if ( x - blurRadius - 1 < 0 )
+ pixel_idx = y * M_IMGDATA->m_width;
+ else
+ pixel_idx = (x - blurRadius - 1) + y * M_IMGDATA->m_width;
+
+ // Subtract the value of the pixel at the left side of the blur
+ // radius box
+ src = src_data + pixel_idx*3;
+ sum_r -= src[0];
+ sum_g -= src[1];
+ sum_b -= src[2];
+ if ( src_alpha )
+ sum_a -= src_alpha[pixel_idx];
+
+ // Take care of edge pixels on the right edge
+ if ( x + blurRadius > M_IMGDATA->m_width - 1 )
+ pixel_idx = M_IMGDATA->m_width - 1 + y * M_IMGDATA->m_width;
+ else
+ pixel_idx = x + blurRadius + y * M_IMGDATA->m_width;
+
+ // Add the value of the pixel being added to the end of our box
+ src = src_data + pixel_idx*3;
+ sum_r += src[0];
+ sum_g += src[1];
+ sum_b += src[2];
+ if ( src_alpha )
+ sum_a += src_alpha[pixel_idx];
+
+ // Save off the averaged data
+ dst = dst_data + x*3 + y*M_IMGDATA->m_width*3;
+ dst[0] = (unsigned char)(sum_r / blurArea);
+ dst[1] = (unsigned char)(sum_g / blurArea);
+ dst[2] = (unsigned char)(sum_b / blurArea);
+ if ( src_alpha )
+ dst_alpha[x + y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea);
+ }
+ }
- sm_handlers.Append( handler );
+ return ret_image;
}
-void wxImage::InsertHandler( wxImageHandler *handler )
+// Blur in the vertical direction
+wxImage wxImage::BlurVertical(int blurRadius)
{
- // make sure that the memory will be freed at the program end
- sm_handlers.DeleteContents(TRUE);
+ wxImage ret_image;
+ ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
- sm_handlers.Insert( handler );
-}
+ unsigned char* src_data = M_IMGDATA->m_data;
+ unsigned char* dst_data = ret_image.GetData();
+ unsigned char* src_alpha = M_IMGDATA->m_alpha;
+ unsigned char* dst_alpha = NULL;
-bool wxImage::RemoveHandler( const wxString& name )
-{
- wxImageHandler *handler = FindHandler(name);
- if (handler)
+ // Check for a mask or alpha
+ if ( M_IMGDATA->m_hasMask )
{
- sm_handlers.DeleteObject(handler);
- return TRUE;
+ ret_image.SetMaskColour(M_IMGDATA->m_maskRed,
+ M_IMGDATA->m_maskGreen,
+ M_IMGDATA->m_maskBlue);
+ }
+ else
+ {
+ if ( src_alpha )
+ {
+ ret_image.SetAlpha();
+ dst_alpha = ret_image.GetAlpha();
+ }
+ }
+
+ // number of pixels we average over
+ const int blurArea = blurRadius*2 + 1;
+
+ // Vertical blurring algorithm - same as horizontal but switched the
+ // opposite direction
+ for ( int x = 0; x < M_IMGDATA->m_width; x++ )
+ {
+ // Variables used in the blurring algorithm
+ long sum_r = 0,
+ sum_g = 0,
+ sum_b = 0,
+ sum_a = 0;
+
+ long pixel_idx;
+ const unsigned char *src;
+ unsigned char *dst;
+
+ // Calculate the average of all pixels in our blur radius box for the
+ // first pixel of the column
+ for ( int kernel_y = -blurRadius; kernel_y <= blurRadius; kernel_y++ )
+ {
+ // To deal with the pixels at the start of a column so it's not
+ // grabbing GOK values from memory at negative indices of the
+ // image's data or grabbing from the previous column
+ if ( kernel_y < 0 )
+ pixel_idx = x;
+ else
+ pixel_idx = x + kernel_y * M_IMGDATA->m_width;
+
+ src = src_data + pixel_idx*3;
+ sum_r += src[0];
+ sum_g += src[1];
+ sum_b += src[2];
+ if ( src_alpha )
+ sum_a += src_alpha[pixel_idx];
+ }
+
+ dst = dst_data + x*3;
+ dst[0] = (unsigned char)(sum_r / blurArea);
+ dst[1] = (unsigned char)(sum_g / blurArea);
+ dst[2] = (unsigned char)(sum_b / blurArea);
+ if ( src_alpha )
+ dst_alpha[x] = (unsigned char)(sum_a / blurArea);
+
+ // Now average the values of the rest of the pixels by just moving the
+ // box along the column from top to bottom
+ for ( int y = 1; y < M_IMGDATA->m_height; y++ )
+ {
+ // Take care of pixels that would be beyond the top edge by
+ // duplicating the top edge pixel for the column
+ if ( y - blurRadius - 1 < 0 )
+ pixel_idx = x;
+ else
+ pixel_idx = x + (y - blurRadius - 1) * M_IMGDATA->m_width;
+
+ // Subtract the value of the pixel at the top of our blur radius box
+ src = src_data + pixel_idx*3;
+ sum_r -= src[0];
+ sum_g -= src[1];
+ sum_b -= src[2];
+ if ( src_alpha )
+ sum_a -= src_alpha[pixel_idx];
+
+ // Take care of the pixels that would be beyond the bottom edge of
+ // the image similar to the top edge
+ if ( y + blurRadius > M_IMGDATA->m_height - 1 )
+ pixel_idx = x + (M_IMGDATA->m_height - 1) * M_IMGDATA->m_width;
+ else
+ pixel_idx = x + (blurRadius + y) * M_IMGDATA->m_width;
+
+ // Add the value of the pixel being added to the end of our box
+ src = src_data + pixel_idx*3;
+ sum_r += src[0];
+ sum_g += src[1];
+ sum_b += src[2];
+ if ( src_alpha )
+ sum_a += src_alpha[pixel_idx];
+
+ // Save off the averaged data
+ dst = dst_data + (x + y * M_IMGDATA->m_width) * 3;
+ dst[0] = (unsigned char)(sum_r / blurArea);
+ dst[1] = (unsigned char)(sum_g / blurArea);
+ dst[2] = (unsigned char)(sum_b / blurArea);
+ if ( src_alpha )
+ dst_alpha[x + y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea);
+ }
+ }
+
+ return ret_image;
+}
+
+// The new blur function
+wxImage wxImage::Blur(int blurRadius)
+{
+ wxImage ret_image;
+ ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
+
+ // Blur the image in each direction
+ ret_image = BlurHorizontal(blurRadius);
+ ret_image = ret_image.BlurVertical(blurRadius);
+
+ return ret_image;
+}
+
+wxImage wxImage::Rotate90( bool clockwise ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false );
+
+ unsigned char *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data;
+ unsigned char *alpha_data = 0 ;
+ unsigned char *source_alpha = 0 ;
+ unsigned char *target_alpha = 0 ;
+
+ if (M_IMGDATA->m_hasMask)
+ {
+ image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+ }
+ else
+ {
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ alpha_data = image.GetAlpha() ;
+ }
+ }
+
+ long height = M_IMGDATA->m_height;
+ long width = M_IMGDATA->m_width;
+
+ for (long j = 0; j < height; j++)
+ {
+ for (long i = 0; i < width; i++)
+ {
+ if (clockwise)
+ {
+ target_data = data + (((i+1)*height) - j - 1)*3;
+ if(source_alpha)
+ target_alpha = alpha_data + (((i+1)*height) - j - 1);
+ }
+ else
+ {
+ target_data = data + ((height*(width-1)) + j - (i*height))*3;
+ if(source_alpha)
+ target_alpha = alpha_data + ((height*(width-1)) + j - (i*height));
+ }
+ memcpy( target_data, source_data, 3 );
+ source_data += 3;
+
+ if(source_alpha)
+ {
+ memcpy( target_alpha, source_alpha, 1 );
+ source_alpha += 1;
+ }
+ }
+ }
+
+ return image;
+}
+
+wxImage wxImage::Mirror( bool horizontally ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
+
+ unsigned char *data = image.GetData();
+ unsigned char *alpha = NULL;
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ if (M_IMGDATA->m_alpha != NULL) {
+ image.SetAlpha();
+ alpha = image.GetAlpha();
+ wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") );
+ }
+
+ if (M_IMGDATA->m_hasMask)
+ image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+
+ long height = M_IMGDATA->m_height;
+ long width = M_IMGDATA->m_width;
+
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data;
+
+ if (horizontally)
+ {
+ for (long j = 0; j < height; j++)
+ {
+ data += width*3;
+ target_data = data-3;
+ for (long i = 0; i < width; i++)
+ {
+ memcpy( target_data, source_data, 3 );
+ source_data += 3;
+ target_data -= 3;
+ }
+ }
+
+ if (alpha != NULL)
+ {
+ // src_alpha starts at the first pixel and increases by 1 after each step
+ // (a step here is the copy of the alpha value of one pixel)
+ const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+ // dest_alpha starts just beyond the first line, decreases before each step,
+ // and after each line is finished, increases by 2 widths (skipping the line
+ // just copied and the line that will be copied next)
+ unsigned char *dest_alpha = alpha + width;
+
+ for (long jj = 0; jj < height; ++jj)
+ {
+ for (long i = 0; i < width; ++i) {
+ *(--dest_alpha) = *(src_alpha++); // copy one pixel
+ }
+ dest_alpha += 2 * width; // advance beyond the end of the next line
+ }
+ }
+ }
+ else
+ {
+ for (long i = 0; i < height; i++)
+ {
+ target_data = data + 3*width*(height-1-i);
+ memcpy( target_data, source_data, (size_t)3*width );
+ source_data += 3*width;
+ }
+
+ if (alpha != NULL)
+ {
+ // src_alpha starts at the first pixel and increases by 1 width after each step
+ // (a step here is the copy of the alpha channel of an entire line)
+ const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+ // dest_alpha starts just beyond the last line (beyond the whole image)
+ // and decreases by 1 width before each step
+ unsigned char *dest_alpha = alpha + width * height;
+
+ for (long jj = 0; jj < height; ++jj)
+ {
+ dest_alpha -= width;
+ memcpy( dest_alpha, src_alpha, (size_t)width );
+ src_alpha += width;
+ }
+ }
+ }
+
+ return image;
+}
+
+wxImage wxImage::GetSubImage( const wxRect &rect ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) &&
+ (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()),
+ image, wxT("invalid subimage size") );
+
+ const int subwidth = rect.GetWidth();
+ const int subheight = rect.GetHeight();
+
+ image.Create( subwidth, subheight, false );
+
+ const unsigned char *src_data = GetData();
+ const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+ unsigned char *subdata = image.GetData();
+ unsigned char *subalpha = NULL;
+
+ wxCHECK_MSG( subdata, image, wxT("unable to create image") );
+
+ if (src_alpha != NULL) {
+ image.SetAlpha();
+ subalpha = image.GetAlpha();
+ wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel"));
+ }
+
+ if (M_IMGDATA->m_hasMask)
+ image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+
+ const int width = GetWidth();
+ const int pixsoff = rect.GetLeft() + width * rect.GetTop();
+
+ src_data += 3 * pixsoff;
+ src_alpha += pixsoff; // won't be used if was NULL, so this is ok
+
+ for (long j = 0; j < subheight; ++j)
+ {
+ memcpy( subdata, src_data, 3 * subwidth );
+ subdata += 3 * subwidth;
+ src_data += 3 * width;
+ if (subalpha != NULL) {
+ memcpy( subalpha, src_alpha, subwidth );
+ subalpha += subwidth;
+ src_alpha += width;
+ }
+ }
+
+ return image;
+}
+
+wxImage wxImage::Size( const wxSize& size, const wxPoint& pos,
+ int r_, int g_, int b_ ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+ wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") );
+
+ int width = GetWidth(), height = GetHeight();
+ image.Create(size.GetWidth(), size.GetHeight(), false);
+
+ unsigned char r = (unsigned char)r_;
+ unsigned char g = (unsigned char)g_;
+ unsigned char b = (unsigned char)b_;
+ if ((r_ == -1) && (g_ == -1) && (b_ == -1))
+ {
+ GetOrFindMaskColour( &r, &g, &b );
+ image.SetMaskColour(r, g, b);
+ }
+
+ image.SetRGB(wxRect(), r, g, b);
+
+ wxRect subRect(pos.x, pos.y, width, height);
+ wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight());
+ if (pos.x < 0)
+ finalRect.width -= pos.x;
+ if (pos.y < 0)
+ finalRect.height -= pos.y;
+
+ subRect.Intersect(finalRect);
+
+ if (!subRect.IsEmpty())
+ {
+ if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height))
+ image.Paste(*this, pos.x, pos.y);
+ else
+ image.Paste(GetSubImage(subRect), pos.x, pos.y);
+ }
+
+ return image;
+}
+
+void wxImage::Paste( const wxImage &image, int x, int y )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+ wxCHECK_RET( image.Ok(), wxT("invalid image") );
+
+ AllocExclusive();
+
+ int xx = 0;
+ int yy = 0;
+ int width = image.GetWidth();
+ int height = image.GetHeight();
+
+ if (x < 0)
+ {
+ xx = -x;
+ width += x;
+ }
+ if (y < 0)
+ {
+ yy = -y;
+ height += y;
+ }
+
+ if ((x+xx)+width > M_IMGDATA->m_width)
+ width = M_IMGDATA->m_width - (x+xx);
+ if ((y+yy)+height > M_IMGDATA->m_height)
+ height = M_IMGDATA->m_height - (y+yy);
+
+ if (width < 1) return;
+ if (height < 1) return;
+
+ if ((!HasMask() && !image.HasMask()) ||
+ (HasMask() && !image.HasMask()) ||
+ ((HasMask() && image.HasMask() &&
+ (GetMaskRed()==image.GetMaskRed()) &&
+ (GetMaskGreen()==image.GetMaskGreen()) &&
+ (GetMaskBlue()==image.GetMaskBlue()))))
+ {
+ width *= 3;
+ unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
+ int source_step = image.GetWidth()*3;
+
+ unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
+ int target_step = M_IMGDATA->m_width*3;
+ for (int j = 0; j < height; j++)
+ {
+ memcpy( target_data, source_data, width );
+ source_data += source_step;
+ target_data += target_step;
+ }
+ return;
+ }
+
+ if (!HasMask() && image.HasMask())
+ {
+ unsigned char r = image.GetMaskRed();
+ unsigned char g = image.GetMaskGreen();
+ unsigned char b = image.GetMaskBlue();
+
+ width *= 3;
+ unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
+ int source_step = image.GetWidth()*3;
+
+ unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
+ int target_step = M_IMGDATA->m_width*3;
+
+ for (int j = 0; j < height; j++)
+ {
+ for (int i = 0; i < width; i+=3)
+ {
+ if ((source_data[i] != r) ||
+ (source_data[i+1] != g) ||
+ (source_data[i+2] != b))
+ {
+ memcpy( target_data+i, source_data+i, 3 );
+ }
+ }
+ source_data += source_step;
+ target_data += target_step;
+ }
+ }
+}
+
+void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1,
+ unsigned char r2, unsigned char g2, unsigned char b2 )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ AllocExclusive();
+
+ unsigned char *data = GetData();
+
+ const int w = GetWidth();
+ const int h = GetHeight();
+
+ for (int j = 0; j < h; j++)
+ for (int i = 0; i < w; i++)
+ {
+ if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1))
+ {
+ data[0] = r2;
+ data[1] = g2;
+ data[2] = b2;
+ }
+ data += 3;
+ }
+}
+
+wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
+
+ unsigned char *dest = image.GetData();
+
+ wxCHECK_MSG( dest, image, wxT("unable to create image") );
+
+ unsigned char *src = M_IMGDATA->m_data;
+ bool hasMask = M_IMGDATA->m_hasMask;
+ unsigned char maskRed = M_IMGDATA->m_maskRed;
+ unsigned char maskGreen = M_IMGDATA->m_maskGreen;
+ unsigned char maskBlue = M_IMGDATA->m_maskBlue;
+
+ if ( hasMask )
+ image.SetMaskColour(maskRed, maskGreen, maskBlue);
+
+ const long size = M_IMGDATA->m_width * M_IMGDATA->m_height;
+ for ( long i = 0; i < size; i++, src += 3, dest += 3 )
+ {
+ // don't modify the mask
+ if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue )
+ {
+ memcpy(dest, src, 3);
+ }
+ else
+ {
+ // calculate the luma
+ double luma = (src[0] * lr + src[1] * lg + src[2] * lb) + 0.5;
+ dest[0] = dest[1] = dest[2] = wx_static_cast(unsigned char, luma);
+ }
+ }
+
+ // copy the alpha channel, if any
+ if (HasAlpha())
+ {
+ const size_t alphaSize = GetWidth() * GetHeight();
+ unsigned char *alpha = (unsigned char*)malloc(alphaSize);
+ memcpy(alpha, GetAlpha(), alphaSize);
+ image.InitAlpha();
+ image.SetAlpha(alpha);
+ }
+
+ return image;
+}
+
+wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
+
+ unsigned char *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ if (M_IMGDATA->m_hasMask)
+ {
+ if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g &&
+ M_IMGDATA->m_maskBlue == b)
+ image.SetMaskColour( 255, 255, 255 );
+ else
+ image.SetMaskColour( 0, 0, 0 );
+ }
+
+ long size = M_IMGDATA->m_height * M_IMGDATA->m_width;
+
+ unsigned char *srcd = M_IMGDATA->m_data;
+ unsigned char *tard = image.GetData();
+
+ for ( long i = 0; i < size; i++, srcd += 3, tard += 3 )
+ {
+ if (srcd[0] == r && srcd[1] == g && srcd[2] == b)
+ tard[0] = tard[1] = tard[2] = 255;
+ else
+ tard[0] = tard[1] = tard[2] = 0;
+ }
+
+ return image;
+}
+
+int wxImage::GetWidth() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ return M_IMGDATA->m_width;
+}
+
+int wxImage::GetHeight() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ return M_IMGDATA->m_height;
+}
+
+long wxImage::XYToIndex(int x, int y) const
+{
+ if ( Ok() &&
+ x >= 0 && y >= 0 &&
+ x < M_IMGDATA->m_width && y < M_IMGDATA->m_height )
+ {
+ return y*M_IMGDATA->m_width + x;
+ }
+
+ return -1;
+}
+
+void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
+{
+ long pos = XYToIndex(x, y);
+ wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
+
+ AllocExclusive();
+
+ pos *= 3;
+
+ M_IMGDATA->m_data[ pos ] = r;
+ M_IMGDATA->m_data[ pos+1 ] = g;
+ M_IMGDATA->m_data[ pos+2 ] = b;
+}
+
+void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ AllocExclusive();
+
+ wxRect rect(rect_);
+ wxRect imageRect(0, 0, GetWidth(), GetHeight());
+ if ( rect == wxRect() )
+ {
+ rect = imageRect;
+ }
+ else
+ {
+ wxCHECK_RET( imageRect.Contains(rect.GetTopLeft()) &&
+ imageRect.Contains(rect.GetBottomRight()),
+ wxT("invalid bounding rectangle") );
+ }
+
+ int x1 = rect.GetLeft(),
+ y1 = rect.GetTop(),
+ x2 = rect.GetRight() + 1,
+ y2 = rect.GetBottom() + 1;
+
+ unsigned char *data wxDUMMY_INITIALIZE(NULL);
+ int x, y, width = GetWidth();
+ for (y = y1; y < y2; y++)
+ {
+ data = M_IMGDATA->m_data + (y*width + x1)*3;
+ for (x = x1; x < x2; x++)
+ {
+ *data++ = r;
+ *data++ = g;
+ *data++ = b;
+ }
+ }
+}
+
+unsigned char wxImage::GetRed( int x, int y ) const
+{
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
+
+ pos *= 3;
+
+ return M_IMGDATA->m_data[pos];
+}
+
+unsigned char wxImage::GetGreen( int x, int y ) const
+{
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
+
+ pos *= 3;
+
+ return M_IMGDATA->m_data[pos+1];
+}
+
+unsigned char wxImage::GetBlue( int x, int y ) const
+{
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
+
+ pos *= 3;
+
+ return M_IMGDATA->m_data[pos+2];
+}
+
+bool wxImage::IsOk() const
+{
+ // image of 0 width or height can't be considered ok - at least because it
+ // causes crashes in ConvertToBitmap() if we don't catch it in time
+ wxImageRefData *data = M_IMGDATA;
+ return data && data->m_ok && data->m_width && data->m_height;
+}
+
+unsigned char *wxImage::GetData() const
+{
+ wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") );
+
+ return M_IMGDATA->m_data;
+}
+
+void wxImage::SetData( unsigned char *data, bool static_data )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ wxImageRefData *newRefData = new wxImageRefData();
+
+ newRefData->m_width = M_IMGDATA->m_width;
+ newRefData->m_height = M_IMGDATA->m_height;
+ newRefData->m_data = data;
+ newRefData->m_ok = true;
+ newRefData->m_maskRed = M_IMGDATA->m_maskRed;
+ newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
+ newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
+ newRefData->m_hasMask = M_IMGDATA->m_hasMask;
+ newRefData->m_static = static_data;
+
+ UnRef();
+
+ m_refData = newRefData;
+}
+
+void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data )
+{
+ wxImageRefData *newRefData = new wxImageRefData();
+
+ if (m_refData)
+ {
+ newRefData->m_width = new_width;
+ newRefData->m_height = new_height;
+ newRefData->m_data = data;
+ newRefData->m_ok = true;
+ newRefData->m_maskRed = M_IMGDATA->m_maskRed;
+ newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
+ newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
+ newRefData->m_hasMask = M_IMGDATA->m_hasMask;
+ }
+ else
+ {
+ newRefData->m_width = new_width;
+ newRefData->m_height = new_height;
+ newRefData->m_data = data;
+ newRefData->m_ok = true;
+ }
+ newRefData->m_static = static_data;
+
+ UnRef();
+
+ m_refData = newRefData;
+}
+
+// ----------------------------------------------------------------------------
+// alpha channel support
+// ----------------------------------------------------------------------------
+
+void wxImage::SetAlpha(int x, int y, unsigned char alpha)
+{
+ wxCHECK_RET( HasAlpha(), wxT("no alpha channel") );
+
+ long pos = XYToIndex(x, y);
+ wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
+
+ AllocExclusive();
+
+ M_IMGDATA->m_alpha[pos] = alpha;
+}
+
+unsigned char wxImage::GetAlpha(int x, int y) const
+{
+ wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") );
+
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
+
+ return M_IMGDATA->m_alpha[pos];
+}
+
+bool
+wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b)
+{
+ SetAlpha(NULL);
+
+ const int w = M_IMGDATA->m_width;
+ const int h = M_IMGDATA->m_height;
+
+ unsigned char *alpha = GetAlpha();
+ unsigned char *data = GetData();
+
+ for ( int y = 0; y < h; y++ )
+ {
+ for ( int x = 0; x < w; x++ )
+ {
+ *alpha++ = *data;
+ *data++ = r;
+ *data++ = g;
+ *data++ = b;
+ }
+ }
+
+ return true;
+}
+
+void wxImage::SetAlpha( unsigned char *alpha, bool static_data )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ AllocExclusive();
+
+ if ( !alpha )
+ {
+ alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height);
+ }
+
+ free(M_IMGDATA->m_alpha);
+ M_IMGDATA->m_alpha = alpha;
+ M_IMGDATA->m_staticAlpha = static_data;
+}
+
+unsigned char *wxImage::GetAlpha() const
+{
+ wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") );
+
+ return M_IMGDATA->m_alpha;
+}
+
+void wxImage::InitAlpha()
+{
+ wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") );
+
+ // initialize memory for alpha channel
+ SetAlpha();
+
+ unsigned char *alpha = M_IMGDATA->m_alpha;
+ const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height;
+
+ if ( HasMask() )
+ {
+ // use the mask to initialize the alpha channel.
+ const unsigned char * const alphaEnd = alpha + lenAlpha;
+
+ const unsigned char mr = M_IMGDATA->m_maskRed;
+ const unsigned char mg = M_IMGDATA->m_maskGreen;
+ const unsigned char mb = M_IMGDATA->m_maskBlue;
+ for ( unsigned char *src = M_IMGDATA->m_data;
+ alpha < alphaEnd;
+ src += 3, alpha++ )
+ {
+ *alpha = (src[0] == mr && src[1] == mg && src[2] == mb)
+ ? wxIMAGE_ALPHA_TRANSPARENT
+ : wxIMAGE_ALPHA_OPAQUE;
+ }
+
+ M_IMGDATA->m_hasMask = false;
+ }
+ else // no mask
+ {
+ // make the image fully opaque
+ memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha);
+ }
+}
+
+// ----------------------------------------------------------------------------
+// mask support
+// ----------------------------------------------------------------------------
+
+void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ AllocExclusive();
+
+ M_IMGDATA->m_maskRed = r;
+ M_IMGDATA->m_maskGreen = g;
+ M_IMGDATA->m_maskBlue = b;
+ M_IMGDATA->m_hasMask = true;
+}
+
+bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const
+{
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ if (M_IMGDATA->m_hasMask)
+ {
+ if (r) *r = M_IMGDATA->m_maskRed;
+ if (g) *g = M_IMGDATA->m_maskGreen;
+ if (b) *b = M_IMGDATA->m_maskBlue;
+ return true;
+ }
+ else
+ {
+ FindFirstUnusedColour(r, g, b);
+ return false;
+ }
+}
+
+unsigned char wxImage::GetMaskRed() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ return M_IMGDATA->m_maskRed;
+}
+
+unsigned char wxImage::GetMaskGreen() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ return M_IMGDATA->m_maskGreen;
+}
+
+unsigned char wxImage::GetMaskBlue() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ return M_IMGDATA->m_maskBlue;
+}
+
+void wxImage::SetMask( bool mask )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ AllocExclusive();
+
+ M_IMGDATA->m_hasMask = mask;
+}
+
+bool wxImage::HasMask() const
+{
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ return M_IMGDATA->m_hasMask;
+}
+
+bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const
+{
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") );
+
+ // check mask
+ if ( M_IMGDATA->m_hasMask )
+ {
+ const unsigned char *p = M_IMGDATA->m_data + 3*pos;
+ if ( p[0] == M_IMGDATA->m_maskRed &&
+ p[1] == M_IMGDATA->m_maskGreen &&
+ p[2] == M_IMGDATA->m_maskBlue )
+ {
+ return true;
+ }
+ }
+
+ // then check alpha
+ if ( M_IMGDATA->m_alpha )
+ {
+ if ( M_IMGDATA->m_alpha[pos] < threshold )
+ {
+ // transparent enough
+ return true;
+ }
+ }
+
+ // not transparent
+ return false;
+}
+
+bool wxImage::SetMaskFromImage(const wxImage& mask,
+ unsigned char mr, unsigned char mg, unsigned char mb)
+{
+ // check that the images are the same size
+ if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) )
+ {
+ wxLogError( _("Image and mask have different sizes.") );
+ return false;
+ }
+
+ // find unused colour
+ unsigned char r,g,b ;
+ if (!FindFirstUnusedColour(&r, &g, &b))
+ {
+ wxLogError( _("No unused colour in image being masked.") );
+ return false ;
+ }
+
+ AllocExclusive();
+
+ unsigned char *imgdata = GetData();
+ unsigned char *maskdata = mask.GetData();
+
+ const int w = GetWidth();
+ const int h = GetHeight();
+
+ for (int j = 0; j < h; j++)
+ {
+ for (int i = 0; i < w; i++)
+ {
+ if ((maskdata[0] == mr) && (maskdata[1] == mg) && (maskdata[2] == mb))
+ {
+ imgdata[0] = r;
+ imgdata[1] = g;
+ imgdata[2] = b;
+ }
+ imgdata += 3;
+ maskdata += 3;
+ }
}
- else
- return FALSE;
+
+ SetMaskColour(r, g, b);
+ SetMask(true);
+
+ return true;
}
-wxImageHandler *wxImage::FindHandler( const wxString& name )
+bool wxImage::ConvertAlphaToMask(unsigned char threshold)
{
- wxNode *node = sm_handlers.First();
- while (node)
+ if (!HasAlpha())
+ return true;
+
+ unsigned char mr, mg, mb;
+ if (!FindFirstUnusedColour(&mr, &mg, &mb))
{
- wxImageHandler *handler = (wxImageHandler*)node->Data();
- if (handler->GetName().Cmp(name) == 0) return handler;
+ wxLogError( _("No unused colour in image being masked.") );
+ return false;
+ }
+
+ AllocExclusive();
+
+ SetMask(true);
+ SetMaskColour(mr, mg, mb);
+
+ unsigned char *imgdata = GetData();
+ unsigned char *alphadata = GetAlpha();
- node = node->Next();
+ int w = GetWidth();
+ int h = GetHeight();
+
+ for (int y = 0; y < h; y++)
+ {
+ for (int x = 0; x < w; x++, imgdata += 3, alphadata++)
+ {
+ if (*alphadata < threshold)
+ {
+ imgdata[0] = mr;
+ imgdata[1] = mg;
+ imgdata[2] = mb;
+ }
+ }
}
- return (wxImageHandler *)NULL;
+
+ free(M_IMGDATA->m_alpha);
+ M_IMGDATA->m_alpha = NULL;
+
+ return true;
}
-wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
+// ----------------------------------------------------------------------------
+// Palette functions
+// ----------------------------------------------------------------------------
+
+#if wxUSE_PALETTE
+
+bool wxImage::HasPalette() const
{
- wxNode *node = sm_handlers.First();
- while (node)
+ if (!Ok())
+ return false;
+
+ return M_IMGDATA->m_palette.Ok();
+}
+
+const wxPalette& wxImage::GetPalette() const
+{
+ wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") );
+
+ return M_IMGDATA->m_palette;
+}
+
+void wxImage::SetPalette(const wxPalette& palette)
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ AllocExclusive();
+
+ M_IMGDATA->m_palette = palette;
+}
+
+#endif // wxUSE_PALETTE
+
+// ----------------------------------------------------------------------------
+// Option functions (arbitrary name/value mapping)
+// ----------------------------------------------------------------------------
+
+void wxImage::SetOption(const wxString& name, const wxString& value)
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ AllocExclusive();
+
+ int idx = M_IMGDATA->m_optionNames.Index(name, false);
+ if (idx == wxNOT_FOUND)
{
- wxImageHandler *handler = (wxImageHandler*)node->Data();
- if ( (handler->GetExtension().Cmp(extension) == 0) &&
- (bitmapType == -1 || handler->GetType() == bitmapType) )
- return handler;
- node = node->Next();
+ M_IMGDATA->m_optionNames.Add(name);
+ M_IMGDATA->m_optionValues.Add(value);
+ }
+ else
+ {
+ M_IMGDATA->m_optionNames[idx] = name;
+ M_IMGDATA->m_optionValues[idx] = value;
}
- return (wxImageHandler*)NULL;
}
-wxImageHandler *wxImage::FindHandler( long bitmapType )
+void wxImage::SetOption(const wxString& name, int value)
{
- wxNode *node = sm_handlers.First();
- while (node)
+ wxString valStr;
+ valStr.Printf(wxT("%d"), value);
+ SetOption(name, valStr);
+}
+
+wxString wxImage::GetOption(const wxString& name) const
+{
+ wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") );
+
+ int idx = M_IMGDATA->m_optionNames.Index(name, false);
+ if (idx == wxNOT_FOUND)
+ return wxEmptyString;
+ else
+ return M_IMGDATA->m_optionValues[idx];
+}
+
+int wxImage::GetOptionInt(const wxString& name) const
+{
+ return wxAtoi(GetOption(name));
+}
+
+bool wxImage::HasOption(const wxString& name) const
+{
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND);
+}
+
+// ----------------------------------------------------------------------------
+// image I/O
+// ----------------------------------------------------------------------------
+
+bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+ long WXUNUSED_UNLESS_STREAMS(type),
+ int WXUNUSED_UNLESS_STREAMS(index) )
+{
+#if HAS_FILE_STREAMS
+ if (wxFileExists(filename))
{
- wxImageHandler *handler = (wxImageHandler *)node->Data();
- if (handler->GetType() == bitmapType) return handler;
- node = node->Next();
+ wxImageFileInputStream stream(filename);
+ wxBufferedInputStream bstream( stream );
+ return LoadFile(bstream, type, index);
+ }
+ else
+ {
+ wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
+
+ return false;
}
- return NULL;
+#else // !HAS_FILE_STREAMS
+ return false;
+#endif // HAS_FILE_STREAMS
}
-wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
+bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+ const wxString& WXUNUSED_UNLESS_STREAMS(mimetype),
+ int WXUNUSED_UNLESS_STREAMS(index) )
{
- wxNode *node = sm_handlers.First();
- while (node)
+#if HAS_FILE_STREAMS
+ if (wxFileExists(filename))
+ {
+ wxImageFileInputStream stream(filename);
+ wxBufferedInputStream bstream( stream );
+ return LoadFile(bstream, mimetype, index);
+ }
+ else
{
- wxImageHandler *handler = (wxImageHandler *)node->Data();
- if (handler->GetMimeType().IsSameAs(mimetype, FALSE)) return handler;
- node = node->Next();
+ wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
+
+ return false;
}
- return NULL;
+#else // !HAS_FILE_STREAMS
+ return false;
+#endif // HAS_FILE_STREAMS
}
-void wxImage::InitStandardHandlers()
+
+
+bool wxImage::SaveFile( const wxString& filename ) const
{
- AddHandler( new wxBMPHandler );
+ wxString ext = filename.AfterLast('.').Lower();
+
+ wxImageHandler * pHandler = FindHandler(ext, -1);
+ if (pHandler)
+ {
+ SaveFile(filename, pHandler->GetType());
+ return true;
+ }
+
+ wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str());
+
+ return false;
}
-void wxImage::CleanUpHandlers()
+bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+ int WXUNUSED_UNLESS_STREAMS(type) ) const
{
- wxNode *node = sm_handlers.First();
- while (node)
+#if HAS_FILE_STREAMS
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
+ wxImageFileOutputStream stream(filename);
+
+ if ( stream.IsOk() )
{
- wxImageHandler *handler = (wxImageHandler *)node->Data();
- wxNode *next = node->Next();
- delete handler;
- delete node;
- node = next;
+ wxBufferedOutputStream bstream( stream );
+ return SaveFile(bstream, type);
}
+#endif // HAS_FILE_STREAMS
+
+ return false;
}
-//-----------------------------------------------------------------------------
-// wxImageHandler
-//-----------------------------------------------------------------------------
+bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+ const wxString& WXUNUSED_UNLESS_STREAMS(mimetype) ) const
+{
+#if HAS_FILE_STREAMS
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxImageHandler,wxObject)
-#endif
+ ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
-#if wxUSE_STREAMS
-bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream) )
+ wxImageFileOutputStream stream(filename);
+
+ if ( stream.IsOk() )
+ {
+ wxBufferedOutputStream bstream( stream );
+ return SaveFile(bstream, mimetype);
+ }
+#endif // HAS_FILE_STREAMS
+
+ return false;
+}
+
+bool wxImage::CanRead( const wxString& WXUNUSED_UNLESS_STREAMS(name) )
{
- return FALSE;
+#if HAS_FILE_STREAMS
+ wxImageFileInputStream stream(name);
+ return CanRead(stream);
+#else
+ return false;
+#endif
}
-bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream) )
+int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name),
+ long WXUNUSED_UNLESS_STREAMS(type) )
{
- return FALSE;
+#if HAS_FILE_STREAMS
+ wxImageFileInputStream stream(name);
+ if (stream.Ok())
+ return GetImageCount(stream, type);
+#endif
+
+ return 0;
}
-#endif // wxUSE_STREAMS
-//-----------------------------------------------------------------------------
-// MSW conversion routines
-//-----------------------------------------------------------------------------
+#if wxUSE_STREAMS
+
+bool wxImage::CanRead( wxInputStream &stream )
+{
+ const wxList& list = GetHandlers();
+
+ for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
+ {
+ wxImageHandler *handler=(wxImageHandler*)node->GetData();
+ if (handler->CanRead( stream ))
+ return true;
+ }
-#ifdef __WXMSW__
+ return false;
+}
-wxBitmap wxImage::ConvertToBitmap() const
+int wxImage::GetImageCount( wxInputStream &stream, long type )
{
- if ( !Ok() )
- return wxNullBitmap;
+ wxImageHandler *handler;
+
+ if ( type == wxBITMAP_TYPE_ANY )
+ {
+ wxList &list=GetHandlers();
+
+ for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext())
+ {
+ handler=(wxImageHandler*)node->GetData();
+ if ( handler->CanRead(stream) )
+ return handler->GetImageCount(stream);
+
+ }
+
+ wxLogWarning(_("No handler found for image type."));
+ return 0;
+ }
- // sizeLimit is the MS upper limit for the DIB size
- int sizeLimit = 1024*768*3;
+ handler = FindHandler(type);
- // width and height of the device-dependent bitmap
- int width = GetWidth();
- int bmpHeight = GetHeight();
+ if ( !handler )
+ {
+ wxLogWarning(_("No image handler for type %ld defined."), type);
+ return false;
+ }
- // calc the number of bytes per scanline and padding
- int bytePerLine = width*3;
- int sizeDWORD = sizeof( DWORD );
- int lineBoundary = bytePerLine % sizeDWORD;
- int padding = 0;
- if( lineBoundary > 0 )
+ if ( handler->CanRead(stream) )
{
- padding = sizeDWORD - lineBoundary;
- bytePerLine += padding;
+ return handler->GetImageCount(stream);
}
- // calc the number of DIBs and heights of DIBs
- int numDIB = 1;
- int hRemain = 0;
- int height = sizeLimit/bytePerLine;
- if( height >= bmpHeight )
- height = bmpHeight;
else
{
- numDIB = bmpHeight / height;
- hRemain = bmpHeight % height;
- if( hRemain >0 ) numDIB++;
- }
-
- // set bitmap parameters
- wxBitmap bitmap;
- wxCHECK_MSG( Ok(), bitmap, _T("invalid image") );
- bitmap.SetWidth( width );
- bitmap.SetHeight( bmpHeight );
- bitmap.SetDepth( wxDisplayDepth() );
-
- // create a DIB header
- int headersize = sizeof(BITMAPINFOHEADER);
- LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize );
- wxCHECK_MSG( lpDIBh, bitmap, _T("could not allocate memory for DIB header") );
- // Fill in the DIB header
- lpDIBh->bmiHeader.biSize = headersize;
- lpDIBh->bmiHeader.biWidth = (DWORD)width;
- lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
- lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
- // the general formula for biSizeImage:
- // ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height;
- lpDIBh->bmiHeader.biPlanes = 1;
- lpDIBh->bmiHeader.biBitCount = 24;
- lpDIBh->bmiHeader.biCompression = BI_RGB;
- lpDIBh->bmiHeader.biClrUsed = 0;
- // These seem not really needed for our purpose here.
- lpDIBh->bmiHeader.biClrImportant = 0;
- lpDIBh->bmiHeader.biXPelsPerMeter = 0;
- lpDIBh->bmiHeader.biYPelsPerMeter = 0;
- // memory for DIB data
- unsigned char *lpBits;
- lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage );
- if( !lpBits )
- {
- wxFAIL_MSG( _T("could not allocate memory for DIB") );
- free( lpDIBh );
- return bitmap;
- }
-
- // create and set the device-dependent bitmap
- HDC hdc = ::GetDC(NULL);
- HDC memdc = ::CreateCompatibleDC( hdc );
- HBITMAP hbitmap;
- hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
- ::SelectObject( memdc, hbitmap);
-
- // copy image data into DIB data and then into DDB (in a loop)
- unsigned char *data = GetData();
- int i, j, n;
- int origin = 0;
- unsigned char *ptdata = data;
- unsigned char *ptbits;
+ wxLogError(_("Image file is not of type %ld."), type);
+ return 0;
+ }
+}
+
+bool wxImage::LoadFile( wxInputStream& stream, long type, int index )
+{
+ UnRef();
+
+ m_refData = new wxImageRefData;
+
+ wxImageHandler *handler;
- for( n=0; n<numDIB; n++ )
+ if ( type == wxBITMAP_TYPE_ANY )
{
- if( numDIB > 1 && n == numDIB-1 && hRemain > 0 )
- {
- // redefine height and size of the (possibly) last smaller DIB
- // memory is not reallocated
- height = hRemain;
- lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
- lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
- }
- ptbits = lpBits;
+ wxList &list=GetHandlers();
- for( j=0; j<height; j++ )
- {
- for( i=0; i<width; i++ )
- {
- *(ptbits++) = *(ptdata+2);
- *(ptbits++) = *(ptdata+1);
- *(ptbits++) = *(ptdata );
- ptdata += 3;
- }
- for( i=0; i< padding; i++ ) *(ptbits++) = 0;
- }
- ::StretchDIBits( memdc, 0, origin, width, height,\
- 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
- origin += height;
- // if numDIB = 1, lines below can also be used
- // hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
- // The above line is equivalent to the following two lines.
- // hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
- // ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
- // or the following lines
- // hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
- // HDC memdc = ::CreateCompatibleDC( hdc );
- // ::SelectObject( memdc, hbitmap);
- // ::SetDIBitsToDevice( memdc, 0, 0, width, height,
- // 0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
- // ::SelectObject( memdc, 0 );
- // ::DeleteDC( memdc );
- }
- bitmap.SetHBITMAP( (WXHBITMAP) hbitmap );
-
- // similarly, created an mono-bitmap for the possible mask
- if( HasMask() )
- {
- hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL );
- ::SelectObject( memdc, hbitmap);
- if( numDIB == 1 ) height = bmpHeight;
- else height = sizeLimit/bytePerLine;
- lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
- lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
- origin = 0;
- unsigned char r = GetMaskRed();
- unsigned char g = GetMaskGreen();
- unsigned char b = GetMaskBlue();
- unsigned char zero = 0, one = 255;
- ptdata = data;
- for( n=0; n<numDIB; n++ )
+ for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
{
- if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 )
- {
- // redefine height and size of the (possibly) last smaller DIB
- // memory is not reallocated
- height = hRemain;
- lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
- lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
- }
- ptbits = lpBits;
- for( int j=0; j<height; j++ )
- {
- for(i=0; i<width; i++ )
- {
- if( (*(ptdata++)!=r) | (*(ptdata++)!=g) | (*(ptdata++)!=b) )
- {
- *(ptbits++) = one;
- *(ptbits++) = one;
- *(ptbits++) = one;
- }
- else
- {
- *(ptbits++) = zero;
- *(ptbits++) = zero;
- *(ptbits++) = zero;
- }
- }
- for( i=0; i< padding; i++ ) *(ptbits++) = zero;
- }
- ::StretchDIBits( memdc, 0, origin, width, height,\
- 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
- origin += height;
+ handler=(wxImageHandler*)node->GetData();
+ if ( handler->CanRead(stream) )
+ return handler->LoadFile(this, stream, true/*verbose*/, index);
+
}
- // create a wxMask object
- wxMask *mask = new wxMask();
- mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
- bitmap.SetMask( mask );
- // It will be deleted when the wxBitmap object is deleted (as of 01/1999)
- /* The following can also be used but is slow to run
- wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
- wxMask *mask = new wxMask( bitmap, colour );
- bitmap.SetMask( mask );
- */
- }
-
- // free allocated resources
- ::SelectObject( memdc, 0 );
- ::DeleteDC( memdc );
- ::ReleaseDC(NULL, hdc);
- free(lpDIBh);
- free(lpBits);
-
- // check the wxBitmap object
- if( bitmap.GetHBITMAP() )
- bitmap.SetOk( TRUE );
+
+ wxLogWarning( _("No handler found for image type.") );
+ return false;
+ }
+
+ handler = FindHandler(type);
+
+ if (handler == 0)
+ {
+ wxLogWarning( _("No image handler for type %ld defined."), type );
+
+ return false;
+ }
+
+ if (stream.IsSeekable() && !handler->CanRead(stream))
+ {
+ wxLogError(_("Image file is not of type %ld."), type);
+ return false;
+ }
+ else
+ return handler->LoadFile(this, stream, true/*verbose*/, index);
+}
+
+bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index )
+{
+ UnRef();
+
+ m_refData = new wxImageRefData;
+
+ wxImageHandler *handler = FindHandlerMime(mimetype);
+
+ if (handler == 0)
+ {
+ wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
+
+ return false;
+ }
+
+ if (stream.IsSeekable() && !handler->CanRead(stream))
+ {
+ wxLogError(_("Image file is not of type %s."), (const wxChar*) mimetype);
+ return false;
+ }
+ else
+ return handler->LoadFile( this, stream, true/*verbose*/, index );
+}
+
+bool wxImage::SaveFile( wxOutputStream& stream, int type ) const
+{
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ wxImageHandler *handler = FindHandler(type);
+ if ( !handler )
+ {
+ wxLogWarning( _("No image handler for type %d defined."), type );
+
+ return false;
+ }
+
+ return handler->SaveFile( (wxImage*)this, stream );
+}
+
+bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const
+{
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ wxImageHandler *handler = FindHandlerMime(mimetype);
+ if ( !handler )
+ {
+ wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
+
+ return false;
+ }
+
+ return handler->SaveFile( (wxImage*)this, stream );
+}
+#endif // wxUSE_STREAMS
+
+// ----------------------------------------------------------------------------
+// image I/O handlers
+// ----------------------------------------------------------------------------
+
+void wxImage::AddHandler( wxImageHandler *handler )
+{
+ // Check for an existing handler of the type being added.
+ if (FindHandler( handler->GetType() ) == 0)
+ {
+ sm_handlers.Append( handler );
+ }
+ else
+ {
+ // This is not documented behaviour, merely the simplest 'fix'
+ // for preventing duplicate additions. If someone ever has
+ // a good reason to add and remove duplicate handlers (and they
+ // may) we should probably refcount the duplicates.
+ // also an issue in InsertHandler below.
+
+ wxLogDebug( _T("Adding duplicate image handler for '%s'"),
+ handler->GetName().c_str() );
+ delete handler;
+ }
+}
+
+void wxImage::InsertHandler( wxImageHandler *handler )
+{
+ // Check for an existing handler of the type being added.
+ if (FindHandler( handler->GetType() ) == 0)
+ {
+ sm_handlers.Insert( handler );
+ }
+ else
+ {
+ // see AddHandler for additional comments.
+ wxLogDebug( _T("Inserting duplicate image handler for '%s'"),
+ handler->GetName().c_str() );
+ delete handler;
+ }
+}
+
+bool wxImage::RemoveHandler( const wxString& name )
+{
+ wxImageHandler *handler = FindHandler(name);
+ if (handler)
+ {
+ sm_handlers.DeleteObject(handler);
+ delete handler;
+ return true;
+ }
else
- bitmap.SetOk( FALSE );
+ return false;
+}
+
+wxImageHandler *wxImage::FindHandler( const wxString& name )
+{
+ wxList::compatibility_iterator node = sm_handlers.GetFirst();
+ while (node)
+ {
+ wxImageHandler *handler = (wxImageHandler*)node->GetData();
+ if (handler->GetName().Cmp(name) == 0) return handler;
- return bitmap;
+ node = node->GetNext();
+ }
+ return 0;
+}
+
+wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
+{
+ wxList::compatibility_iterator node = sm_handlers.GetFirst();
+ while (node)
+ {
+ wxImageHandler *handler = (wxImageHandler*)node->GetData();
+ if ( (handler->GetExtension().Cmp(extension) == 0) &&
+ (bitmapType == -1 || handler->GetType() == bitmapType) )
+ return handler;
+ node = node->GetNext();
+ }
+ return 0;
}
-wxImage::wxImage( const wxBitmap &bitmap )
+wxImageHandler *wxImage::FindHandler( long bitmapType )
{
- // check the bitmap
- if( !bitmap.Ok() )
+ wxList::compatibility_iterator node = sm_handlers.GetFirst();
+ while (node)
{
- wxFAIL_MSG( _T("invalid bitmap") );
- return;
+ wxImageHandler *handler = (wxImageHandler *)node->GetData();
+ if (handler->GetType() == bitmapType) return handler;
+ node = node->GetNext();
}
+ return 0;
+}
- // create an wxImage object
- int width = bitmap.GetWidth();
- int height = bitmap.GetHeight();
- Create( width, height );
- unsigned char *data = GetData();
- if( !data )
+wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
+{
+ wxList::compatibility_iterator node = sm_handlers.GetFirst();
+ while (node)
{
- wxFAIL_MSG( _T("could not allocate data for image") );
- return;
+ wxImageHandler *handler = (wxImageHandler *)node->GetData();
+ if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler;
+ node = node->GetNext();
}
+ return 0;
+}
+
+void wxImage::InitStandardHandlers()
+{
+#if wxUSE_STREAMS
+ AddHandler(new wxBMPHandler);
+#endif // wxUSE_STREAMS
+}
- // calc the number of bytes per scanline and padding in the DIB
- int bytePerLine = width*3;
- int sizeDWORD = sizeof( DWORD );
- int lineBoundary = bytePerLine % sizeDWORD;
- int padding = 0;
- if( lineBoundary > 0 )
+void wxImage::CleanUpHandlers()
+{
+ wxList::compatibility_iterator node = sm_handlers.GetFirst();
+ while (node)
{
- padding = sizeDWORD - lineBoundary;
- bytePerLine += padding;
+ wxImageHandler *handler = (wxImageHandler *)node->GetData();
+ wxList::compatibility_iterator next = node->GetNext();
+ delete handler;
+ node = next;
}
- // create a DIB header
- int headersize = sizeof(BITMAPINFOHEADER);
- LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize );
- if( !lpDIBh )
+ sm_handlers.Clear();
+}
+
+wxString wxImage::GetImageExtWildcard()
+{
+ wxString fmts;
+
+ wxList& Handlers = wxImage::GetHandlers();
+ wxList::compatibility_iterator Node = Handlers.GetFirst();
+ while ( Node )
{
- wxFAIL_MSG( _T("could not allocate data for DIB header") );
- free( data );
- return;
- }
- // Fill in the DIB header
- lpDIBh->bmiHeader.biSize = headersize;
- lpDIBh->bmiHeader.biWidth = width;
- lpDIBh->bmiHeader.biHeight = -height;
- lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
- lpDIBh->bmiHeader.biPlanes = 1;
- lpDIBh->bmiHeader.biBitCount = 24;
- lpDIBh->bmiHeader.biCompression = BI_RGB;
- lpDIBh->bmiHeader.biClrUsed = 0;
- // These seem not really needed for our purpose here.
- lpDIBh->bmiHeader.biClrImportant = 0;
- lpDIBh->bmiHeader.biXPelsPerMeter = 0;
- lpDIBh->bmiHeader.biYPelsPerMeter = 0;
- // memory for DIB data
- unsigned char *lpBits;
- lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
- if( !lpBits )
- {
- wxFAIL_MSG( _T("could not allocate data for DIB") );
- free( data );
- free( lpDIBh );
- return;
+ wxImageHandler* Handler = (wxImageHandler*)Node->GetData();
+ fmts += wxT("*.") + Handler->GetExtension();
+ Node = Node->GetNext();
+ if ( Node ) fmts += wxT(";");
}
- // copy data from the device-dependent bitmap to the DIB
- HDC hdc = ::GetDC(NULL);
- HBITMAP hbitmap;
- hbitmap = (HBITMAP) bitmap.GetHBITMAP();
- ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
+ return wxT("(") + fmts + wxT(")|") + fmts;
+}
- // copy DIB data into the wxImage object
- int i, j;
- unsigned char *ptdata = data;
- unsigned char *ptbits = lpBits;
- for( i=0; i<height; i++ )
+wxImage::HSVValue wxImage::RGBtoHSV(const RGBValue& rgb)
+{
+ const double red = rgb.red / 255.0,
+ green = rgb.green / 255.0,
+ blue = rgb.blue / 255.0;
+
+ // find the min and max intensity (and remember which one was it for the
+ // latter)
+ double minimumRGB = red;
+ if ( green < minimumRGB )
+ minimumRGB = green;
+ if ( blue < minimumRGB )
+ minimumRGB = blue;
+
+ enum { RED, GREEN, BLUE } chMax = RED;
+ double maximumRGB = red;
+ if ( green > maximumRGB )
{
- for( j=0; j<width; j++ )
- {
- *(ptdata++) = *(ptbits+2);
- *(ptdata++) = *(ptbits+1);
- *(ptdata++) = *(ptbits );
- ptbits += 3;
- }
- ptbits += padding;
- }
-
- // similarly, set data according to the possible mask bitmap
- if( bitmap.GetMask() && bitmap.GetMask()->GetMaskBitmap() )
- {
- hbitmap = (HBITMAP) bitmap.GetMask()->GetMaskBitmap();
- // memory DC created, color set, data copied, and memory DC deleted
- HDC memdc = ::CreateCompatibleDC( hdc );
- ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
- ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
- ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
- ::DeleteDC( memdc );
- // background color set to RGB(16,16,16) in consistent with wxGTK
- unsigned char r=16, g=16, b=16;
- ptdata = data;
- ptbits = lpBits;
- for( i=0; i<height; i++ )
- {
- for( j=0; j<width; j++ )
- {
- if( *ptbits != 0 )
- ptdata += 3;
- else
- {
- *(ptdata++) = r;
- *(ptdata++) = g;
- *(ptdata++) = b;
- }
- ptbits += 3;
- }
- ptbits += padding;
- }
- SetMaskColour( r, g, b );
- SetMask( TRUE );
+ chMax = GREEN;
+ maximumRGB = green;
}
- else
+ if ( blue > maximumRGB )
{
- SetMask( FALSE );
+ chMax = BLUE;
+ maximumRGB = blue;
}
- // free allocated resources
- ::ReleaseDC(NULL, hdc);
- free(lpDIBh);
- free(lpBits);
-}
-
-#endif
-
-//-----------------------------------------------------------------------------
-// GTK conversion routines
-//-----------------------------------------------------------------------------
-
-#ifdef __WXGTK__
-
-#include "gtk/gtk.h"
-#include "gdk/gdk.h"
-#include "gdk/gdkx.h"
-#if (GTK_MINOR_VERSION > 0)
-#include "gdk/gdkrgb.h"
-#endif
-
-wxBitmap wxImage::ConvertToBitmap() const
-{
- wxBitmap bitmap;
+ const double value = maximumRGB;
- wxCHECK_MSG( Ok(), bitmap, _T("invalid image") );
+ double hue = 0.0, saturation;
+ const double deltaRGB = maximumRGB - minimumRGB;
+ if ( wxIsNullDouble(deltaRGB) )
+ {
+ // Gray has no color
+ hue = 0.0;
+ saturation = 0.0;
+ }
+ else
+ {
+ switch ( chMax )
+ {
+ case RED:
+ hue = (green - blue) / deltaRGB;
+ break;
- int width = GetWidth();
- int height = GetHeight();
+ case GREEN:
+ hue = 2.0 + (blue - red) / deltaRGB;
+ break;
- bitmap.SetHeight( height );
- bitmap.SetWidth( width );
+ case BLUE:
+ hue = 4.0 + (red - green) / deltaRGB;
+ break;
- bitmap.SetPixmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, -1 ) );
+ default:
+ wxFAIL_MSG(wxT("hue not specified"));
+ break;
+ }
- // Retrieve depth
+ hue /= 6.0;
- GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
- if (visual == NULL) visual = gdk_visual_get_system();
- int bpp = visual->depth;
+ if ( hue < 0.0 )
+ hue += 1.0;
- bitmap.SetDepth( bpp );
+ saturation = deltaRGB / maximumRGB;
+ }
- if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
- if (bpp < 8) bpp = 8;
+ return HSVValue(hue, saturation, value);
+}
-#if (GTK_MINOR_VERSION > 0)
+wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv)
+{
+ double red, green, blue;
- if (!HasMask() && (bpp > 8))
+ if ( wxIsNullDouble(hsv.saturation) )
{
- static bool s_hasInitialized = FALSE;
+ // Grey
+ red = hsv.value;
+ green = hsv.value;
+ blue = hsv.value;
+ }
+ else // not grey
+ {
+ double hue = hsv.hue * 6.0; // sector 0 to 5
+ int i = (int)floor(hue);
+ double f = hue - i; // fractional part of h
+ double p = hsv.value * (1.0 - hsv.saturation);
- if (!s_hasInitialized)
- {
- gdk_rgb_init();
- s_hasInitialized = TRUE;
- }
+ switch (i)
+ {
+ case 0:
+ red = hsv.value;
+ green = hsv.value * (1.0 - hsv.saturation * (1.0 - f));
+ blue = p;
+ break;
+
+ case 1:
+ red = hsv.value * (1.0 - hsv.saturation * f);
+ green = hsv.value;
+ blue = p;
+ break;
+
+ case 2:
+ red = p;
+ green = hsv.value;
+ blue = hsv.value * (1.0 - hsv.saturation * (1.0 - f));
+ break;
+
+ case 3:
+ red = p;
+ green = hsv.value * (1.0 - hsv.saturation * f);
+ blue = hsv.value;
+ break;
+
+ case 4:
+ red = hsv.value * (1.0 - hsv.saturation * (1.0 - f));
+ green = p;
+ blue = hsv.value;
+ break;
+
+ default: // case 5:
+ red = hsv.value;
+ green = p;
+ blue = hsv.value * (1.0 - hsv.saturation * f);
+ break;
+ }
+ }
- GdkGC *gc = gdk_gc_new( bitmap.GetPixmap() );
+ return RGBValue((unsigned char)(red * 255.0),
+ (unsigned char)(green * 255.0),
+ (unsigned char)(blue * 255.0));
+}
- gdk_draw_rgb_image( bitmap.GetPixmap(),
- gc,
- 0, 0,
- width, height,
- GDK_RGB_DITHER_NONE,
- GetData(),
- width*3 );
+/*
+ * Rotates the hue of each pixel of the image. angle is a double in the range
+ * -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees
+ */
+void wxImage::RotateHue(double angle)
+{
+ AllocExclusive();
- gdk_gc_unref( gc );
+ unsigned char *srcBytePtr;
+ unsigned char *dstBytePtr;
+ unsigned long count;
+ wxImage::HSVValue hsv;
+ wxImage::RGBValue rgb;
- return bitmap;
+ wxASSERT (angle >= -1.0 && angle <= 1.0);
+ count = M_IMGDATA->m_width * M_IMGDATA->m_height;
+ if ( count > 0 && !wxIsNullDouble(angle) )
+ {
+ srcBytePtr = M_IMGDATA->m_data;
+ dstBytePtr = srcBytePtr;
+ do
+ {
+ rgb.red = *srcBytePtr++;
+ rgb.green = *srcBytePtr++;
+ rgb.blue = *srcBytePtr++;
+ hsv = RGBtoHSV(rgb);
+
+ hsv.hue = hsv.hue + angle;
+ if (hsv.hue > 1.0)
+ hsv.hue = hsv.hue - 1.0;
+ else if (hsv.hue < 0.0)
+ hsv.hue = hsv.hue + 1.0;
+
+ rgb = HSVtoRGB(hsv);
+ *dstBytePtr++ = rgb.red;
+ *dstBytePtr++ = rgb.green;
+ *dstBytePtr++ = rgb.blue;
+ } while (--count != 0);
}
+}
-#endif
+//-----------------------------------------------------------------------------
+// wxImageHandler
+//-----------------------------------------------------------------------------
- // Create picture image
+IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject)
- GdkImage *data_image =
- gdk_image_new( GDK_IMAGE_FASTEST, gdk_visual_get_system(), width, height );
+#if wxUSE_STREAMS
+bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) )
+{
+ return false;
+}
- // Create mask image
+bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) )
+{
+ return false;
+}
- GdkImage *mask_image = (GdkImage*) NULL;
+int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) )
+{
+ return 1;
+}
- if (HasMask())
+bool wxImageHandler::CanRead( const wxString& name )
+{
+ if (wxFileExists(name))
{
- unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
-
- mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height );
-
- wxMask *mask = new wxMask();
- mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 );
-
- bitmap.SetMask( mask );
+ wxImageFileInputStream stream(name);
+ return CanRead(stream);
}
- // Render
+ wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
- enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
- byte_order b_o = RGB;
+ return false;
+}
- if (bpp >= 24)
+bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
+{
+ wxFileOffset posOld = stream.TellI();
+ if ( posOld == wxInvalidOffset )
{
- GdkVisual *visual = gdk_visual_get_system();
- if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask)) b_o = RGB;
- else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask)) b_o = RGB;
- else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask)) b_o = BRG;
- else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
- else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask)) b_o = GRB;
- else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask)) b_o = GBR;
+ // can't test unseekable stream
+ return false;
}
- int r_mask = GetMaskRed();
- int g_mask = GetMaskGreen();
- int b_mask = GetMaskBlue();
+ bool ok = DoCanRead(stream);
- unsigned char* data = GetData();
-
- int index = 0;
- for (int y = 0; y < height; y++)
+ // restore the old position to be able to test other formats and so on
+ if ( stream.SeekI(posOld) == wxInvalidOffset )
{
- for (int x = 0; x < width; x++)
- {
- int r = data[index];
- index++;
- int g = data[index];
- index++;
- int b = data[index];
- index++;
-
- if (HasMask())
- {
- if ((r == r_mask) && (b == b_mask) && (g == g_mask))
- gdk_image_put_pixel( mask_image, x, y, 1 );
- else
- gdk_image_put_pixel( mask_image, x, y, 0 );
- }
+ wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!"));
- if (HasMask())
- {
- if ((r == r_mask) && (b == b_mask) && (g == g_mask))
- gdk_image_put_pixel( mask_image, x, y, 1 );
- else
- gdk_image_put_pixel( mask_image, x, y, 0 );
- }
+ // reading would fail anyhow as we're not at the right position
+ return false;
+ }
- switch (bpp)
- {
- case 8:
- {
- int pixel = -1;
- if (wxTheApp->m_colorCube)
- {
- pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
- }
- else
- {
- GdkColormap *cmap = gtk_widget_get_default_colormap();
- GdkColor *colors = cmap->colors;
- int max = 3 * (65536);
+ return ok;
+}
- for (int i = 0; i < cmap->size; i++)
- {
- int rdiff = (r << 8) - colors[i].red;
- int gdiff = (g << 8) - colors[i].green;
- int bdiff = (b << 8) - colors[i].blue;
- int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
- if (sum < max) { pixel = i; max = sum; }
- }
- }
+#endif // wxUSE_STREAMS
- gdk_image_put_pixel( data_image, x, y, pixel );
+// ----------------------------------------------------------------------------
+// image histogram stuff
+// ----------------------------------------------------------------------------
+
+bool
+wxImageHistogram::FindFirstUnusedColour(unsigned char *r,
+ unsigned char *g,
+ unsigned char *b,
+ unsigned char r2,
+ unsigned char b2,
+ unsigned char g2) const
+{
+ unsigned long key = MakeKey(r2, g2, b2);
- break;
- }
- case 15:
- {
- guint32 pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3);
- gdk_image_put_pixel( data_image, x, y, pixel );
- break;
- }
- case 16:
- {
- guint32 pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3);
- gdk_image_put_pixel( data_image, x, y, pixel );
- break;
- }
- case 32:
- case 24:
+ while ( find(key) != end() )
+ {
+ // color already used
+ r2++;
+ if ( r2 >= 255 )
+ {
+ r2 = 0;
+ g2++;
+ if ( g2 >= 255 )
+ {
+ g2 = 0;
+ b2++;
+ if ( b2 >= 255 )
{
- guint32 pixel = 0;
- switch (b_o)
- {
- case RGB: pixel = (r << 16) | (g << 8) | b; break;
- case RBG: pixel = (r << 16) | (b << 8) | g; break;
- case BRG: pixel = (b << 16) | (r << 8) | g; break;
- case BGR: pixel = (b << 16) | (g << 8) | r; break;
- case GRB: pixel = (g << 16) | (r << 8) | b; break;
- case GBR: pixel = (g << 16) | (b << 8) | r; break;
- }
- gdk_image_put_pixel( data_image, x, y, pixel );
+ wxLogError(_("No unused colour in image.") );
+ return false;
}
- default: break;
}
- } // for
- } // for
-
- // Blit picture
-
- GdkGC *data_gc = gdk_gc_new( bitmap.GetPixmap() );
-
- gdk_draw_image( bitmap.GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
-
- gdk_image_destroy( data_image );
- gdk_gc_unref( data_gc );
-
- // Blit mask
-
- if (HasMask())
- {
- GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() );
-
- gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
+ }
- gdk_image_destroy( mask_image );
- gdk_gc_unref( mask_gc );
+ key = MakeKey(r2, g2, b2);
}
- return bitmap;
+ if ( r )
+ *r = r2;
+ if ( g )
+ *g = g2;
+ if ( b )
+ *b = b2;
+
+ return true;
}
-wxImage::wxImage( const wxBitmap &bitmap )
+bool
+wxImage::FindFirstUnusedColour(unsigned char *r,
+ unsigned char *g,
+ unsigned char *b,
+ unsigned char r2,
+ unsigned char b2,
+ unsigned char g2) const
{
- wxCHECK_RET( bitmap.Ok(), _T("invalid bitmap") );
-
- GdkImage *gdk_image = gdk_image_get( bitmap.GetPixmap(),
- 0, 0,
- bitmap.GetWidth(), bitmap.GetHeight() );
-
- wxCHECK_RET( gdk_image, _T("couldn't create image") );
+ wxImageHistogram histogram;
- Create( bitmap.GetWidth(), bitmap.GetHeight() );
- char unsigned *data = GetData();
+ ComputeHistogram(histogram);
- if (!data)
- {
- gdk_image_destroy( gdk_image );
- wxFAIL_MSG( _T("couldn't create image") );
- return;
- }
+ return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2);
+}
- GdkImage *gdk_image_mask = (GdkImage*) NULL;
- if (bitmap.GetMask())
- {
- gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(),
- 0, 0,
- bitmap.GetWidth(), bitmap.GetHeight() );
- SetMaskColour( 16, 16, 16 ); // anything unlikely and dividable
- }
- GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
- if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent );
- int bpp = visual->depth;
- if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
+// GRG, Dic/99
+// Counts and returns the number of different colours. Optionally stops
+// when it exceeds 'stopafter' different colours. This is useful, for
+// example, to see if the image can be saved as 8-bit (256 colour or
+// less, in this case it would be invoked as CountColours(256)). Default
+// value for stopafter is -1 (don't care).
+//
+unsigned long wxImage::CountColours( unsigned long stopafter ) const
+{
+ wxHashTable h;
+ wxObject dummy;
+ unsigned char r, g, b;
+ unsigned char *p;
+ unsigned long size, nentries, key;
- GdkColormap *cmap = gtk_widget_get_default_colormap();
+ p = GetData();
+ size = GetWidth() * GetHeight();
+ nentries = 0;
- long pos = 0;
- for (int j = 0; j < bitmap.GetHeight(); j++)
+ for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++)
{
- for (int i = 0; i < bitmap.GetWidth(); i++)
- {
- wxInt32 pixel = gdk_image_get_pixel( gdk_image, i, j );
- pixel = wxINT32_SWAP_ON_BE( pixel );
- if (bpp <= 8)
- {
- data[pos] = cmap->colors[pixel].red >> 8;
- data[pos+1] = cmap->colors[pixel].green >> 8;
- data[pos+2] = cmap->colors[pixel].blue >> 8;
- } else if (bpp == 15)
- {
- data[pos] = (pixel >> 7) & 0xf8;
- data[pos+1] = (pixel >> 2) & 0xf8;
- data[pos+2] = (pixel << 3) & 0xf8;
- } else if (bpp == 16)
- {
- data[pos] = (pixel >> 8) & 0xf8;
- data[pos+1] = (pixel >> 3) & 0xfc;
- data[pos+2] = (pixel << 3) & 0xf8;
- } else
- {
- data[pos] = (pixel >> 16) & 0xff;
- data[pos+1] = (pixel >> 8) & 0xff;
- data[pos+2] = pixel & 0xff;
- }
-
- if (gdk_image_mask)
- {
- int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
- if (mask_pixel == 0)
- {
- data[pos] = 16;
- data[pos+1] = 16;
- data[pos+2] = 16;
- }
- }
+ r = *(p++);
+ g = *(p++);
+ b = *(p++);
+ key = wxImageHistogram::MakeKey(r, g, b);
- pos += 3;
+ if (h.Get(key) == NULL)
+ {
+ h.Put(key, &dummy);
+ nentries++;
}
}
- gdk_image_destroy( gdk_image );
- if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
+ return nentries;
}
-#endif
-
-//-----------------------------------------------------------------------------
-// Motif conversion routines
-//-----------------------------------------------------------------------------
-#ifdef __WXMOTIF__
+unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const
+{
+ unsigned char *p = GetData();
+ unsigned long nentries = 0;
-#include <Xm/Xm.h>
-#include "wx/utils.h"
-#include <math.h>
+ h.clear();
-wxBitmap wxImage::ConvertToBitmap() const
-{
- wxBitmap bitmap;
+ const unsigned long size = GetWidth() * GetHeight();
- wxCHECK_MSG( Ok(), bitmap, _T("invalid image") );
+ unsigned char r, g, b;
+ for ( unsigned long n = 0; n < size; n++ )
+ {
+ r = *p++;
+ g = *p++;
+ b = *p++;
- int width = GetWidth();
- int height = GetHeight();
+ wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)];
- bitmap.SetHeight( height );
- bitmap.SetWidth( width );
+ if ( entry.value++ == 0 )
+ entry.index = nentries++;
+ }
- Display *dpy = (Display*) wxGetDisplay();
- Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) );
- int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) );
+ return nentries;
+}
- // Create image
+/*
+ * Rotation code by Carlos Moreno
+ */
- XImage *data_image = XCreateImage( dpy, vis, bpp, ZPixmap, 0, 0, width, height, 32, 0 );
- data_image->data = (char*) malloc( data_image->bytes_per_line * data_image->height );
+// GRG: I've removed wxRotationPoint - we already have wxRealPoint which
+// does exactly the same thing. And I also got rid of wxRotationPixel
+// bacause of potential problems in architectures where alignment
+// is an issue, so I had to rewrite parts of the code.
- bitmap.Create( width, height, bpp );
+static const double gs_Epsilon = 1e-10;
- /*
- // Create mask
+static inline int wxCint (double x)
+{
+ return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5);
+}
- GdkImage *mask_image = (GdkImage*) NULL;
- if (HasMask())
- {
- unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
+// Auxiliary function to rotate a point (x,y) with respect to point p0
+// make it inline and use a straight return to facilitate optimization
+// also, the function receives the sine and cosine of the angle to avoid
+// repeating the time-consuming calls to these functions -- sin/cos can
+// be computed and stored in the calling function.
- mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height );
+inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0)
+{
+ return wxRealPoint (p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle,
+ p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle);
+}
- wxMask *mask = new wxMask();
- mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 );
+inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0)
+{
+ return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0);
+}
- bitmap.SetMask( mask );
- }
- */
+wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const
+{
+ int i;
+ angle = -angle; // screen coordinates are a mirror image of "real" coordinates
- // Retrieve depth info
+ bool has_alpha = HasAlpha();
- XVisualInfo vinfo_template;
- XVisualInfo *vi;
+ // Create pointer-based array to accelerate access to wxImage's data
+ unsigned char ** data = new unsigned char * [GetHeight()];
+ data[0] = GetData();
+ for (i = 1; i < GetHeight(); i++)
+ data[i] = data[i - 1] + (3 * GetWidth());
- vinfo_template.visual = vis;
- vinfo_template.visualid = XVisualIDFromVisual( vis );
- vinfo_template.depth = bpp;
- int nitem = 0;
+ // Same for alpha channel
+ unsigned char ** alpha = NULL;
+ if (has_alpha)
+ {
+ alpha = new unsigned char * [GetHeight()];
+ alpha[0] = GetAlpha();
+ for (i = 1; i < GetHeight(); i++)
+ alpha[i] = alpha[i - 1] + GetWidth();
+ }
- vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem );
+ // precompute coefficients for rotation formula
+ // (sine and cosine of the angle)
+ const double cos_angle = cos(angle);
+ const double sin_angle = sin(angle);
- wxCHECK_MSG( vi, wxNullBitmap, _T("no visual") );
+ // Create new Image to store the result
+ // First, find rectangle that covers the rotated image; to do that,
+ // rotate the four corners
- XFree( vi );
+ const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y);
- if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15;
- if (bpp < 8) bpp = 8;
+ wxRealPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0);
+ wxRealPoint p2 = rotated_point (0, GetHeight(), cos_angle, sin_angle, p0);
+ wxRealPoint p3 = rotated_point (GetWidth(), 0, cos_angle, sin_angle, p0);
+ wxRealPoint p4 = rotated_point (GetWidth(), GetHeight(), cos_angle, sin_angle, p0);
- // Render
+ int x1a = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x)));
+ int y1a = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y)));
+ int x2a = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
+ int y2a = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y)));
- enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
- byte_order b_o = RGB;
+ // Create rotated image
+ wxImage rotated (x2a - x1a + 1, y2a - y1a + 1, false);
+ // With alpha channel
+ if (has_alpha)
+ rotated.SetAlpha();
- if (bpp >= 24)
+ if (offset_after_rotation != NULL)
{
- if ((vi->red_mask > vi->green_mask) && (vi->green_mask > vi->blue_mask)) b_o = RGB;
- else if ((vi->red_mask > vi->blue_mask) && (vi->blue_mask > vi->green_mask)) b_o = RGB;
- else if ((vi->blue_mask > vi->red_mask) && (vi->red_mask > vi->green_mask)) b_o = BRG;
- else if ((vi->blue_mask > vi->green_mask) && (vi->green_mask > vi->red_mask)) b_o = BGR;
- else if ((vi->green_mask > vi->red_mask) && (vi->red_mask > vi->blue_mask)) b_o = GRB;
- else if ((vi->green_mask > vi->blue_mask) && (vi->blue_mask > vi->red_mask)) b_o = GBR;
+ *offset_after_rotation = wxPoint (x1a, y1a);
}
- /*
- int r_mask = GetMaskRed();
- int g_mask = GetMaskGreen();
- int b_mask = GetMaskBlue();
- */
+ // GRG: The rotated (destination) image is always accessed
+ // sequentially, so there is no need for a pointer-based
+ // array here (and in fact it would be slower).
+ //
+ unsigned char * dst = rotated.GetData();
- XColor colors[256];
- if (bpp == 8)
- {
- Colormap cmap = (Colormap) wxTheApp->GetMainColormap( dpy );
+ unsigned char * alpha_dst = NULL;
+ if (has_alpha)
+ alpha_dst = rotated.GetAlpha();
+
+ // GRG: if the original image has a mask, use its RGB values
+ // as the blank pixel, else, fall back to default (black).
+ //
+ unsigned char blank_r = 0;
+ unsigned char blank_g = 0;
+ unsigned char blank_b = 0;
- for (int i = 0; i < 256; i++) colors[i].pixel = i;
- XQueryColors( dpy, cmap, colors, 256 );
+ if (HasMask())
+ {
+ blank_r = GetMaskRed();
+ blank_g = GetMaskGreen();
+ blank_b = GetMaskBlue();
+ rotated.SetMaskColour( blank_r, blank_g, blank_b );
}
- unsigned char* data = GetData();
+ // Now, for each point of the rotated image, find where it came from, by
+ // performing an inverse rotation (a rotation of -angle) and getting the
+ // pixel at those coordinates
- int index = 0;
- for (int y = 0; y < height; y++)
+ // GRG: I've taken the (interpolating) test out of the loops, so that
+ // it is done only once, instead of repeating it for each pixel.
+
+ int x;
+ if (interpolating)
{
- for (int x = 0; x < width; x++)
+ for (int y = 0; y < rotated.GetHeight(); y++)
{
- int r = data[index];
- index++;
- int g = data[index];
- index++;
- int b = data[index];
- index++;
-
- /*
- if (HasMask())
+ for (x = 0; x < rotated.GetWidth(); x++)
{
- if ((r == r_mask) && (b == b_mask) && (g == g_mask))
- gdk_image_put_pixel( mask_image, x, y, 1 );
- else
- gdk_image_put_pixel( mask_image, x, y, 0 );
- }
- */
+ wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0);
- switch (bpp)
- {
- case 8:
+ if (-0.25 < src.x && src.x < GetWidth() - 0.75 &&
+ -0.25 < src.y && src.y < GetHeight() - 0.75)
{
- int pixel = -1;
- /*
- if (wxTheApp->m_colorCube)
+ // interpolate using the 4 enclosing grid-points. Those
+ // points can be obtained using floor and ceiling of the
+ // exact coordinates of the point
+ int x1, y1, x2, y2;
+
+ if (0 < src.x && src.x < GetWidth() - 1)
{
- pixel = wxTheApp->m_colorCube
- [ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
+ x1 = wxCint(floor(src.x));
+ x2 = wxCint(ceil(src.x));
}
- else
+ else // else means that x is near one of the borders (0 or width-1)
{
- */
- int max = 3 * (65536);
- for (int i = 0; i < 256; i++)
- {
- int rdiff = (r << 8) - colors[i].red;
- int gdiff = (g << 8) - colors[i].green;
- int bdiff = (b << 8) - colors[i].blue;
- int sum = abs (rdiff) + abs (gdiff) + abs (bdiff);
- if (sum < max) { pixel = i; max = sum; }
+ x1 = x2 = wxCint (src.x);
}
- /*
+
+ if (0 < src.y && src.y < GetHeight() - 1)
+ {
+ y1 = wxCint(floor(src.y));
+ y2 = wxCint(ceil(src.y));
}
- */
- XPutPixel( data_image, x, y, pixel );
- break;
- }
- case 15:
- {
- int pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3);
- XPutPixel( data_image, x, y, pixel );
- break;
- }
- case 16:
- {
- int pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3);
- XPutPixel( data_image, x, y, pixel );
- break;
- }
- case 32:
- case 24:
- {
- int pixel = 0;
- switch (b_o)
+ else
{
- case RGB: pixel = (r << 16) | (g << 8) | b; break;
- case RBG: pixel = (r << 16) | (b << 8) | g; break;
- case BRG: pixel = (b << 16) | (r << 8) | g; break;
- case BGR: pixel = (b << 16) | (g << 8) | r; break;
- case GRB: pixel = (g << 16) | (r << 8) | b; break;
- case GBR: pixel = (g << 16) | (b << 8) | r; break;
+ y1 = y2 = wxCint (src.y);
}
- XPutPixel( data_image, x, y, pixel );
- }
- default: break;
- }
- } // for
- } // for
- // Blit picture
+ // get four points and the distances (square of the distance,
+ // for efficiency reasons) for the interpolation formula
- XGCValues gcvalues;
- gcvalues.foreground = BlackPixel( dpy, DefaultScreen( dpy ) );
- GC gc = XCreateGC( dpy, RootWindow ( dpy, DefaultScreen(dpy) ), GCForeground, &gcvalues );
- XPutImage( dpy, (Drawable)bitmap.GetPixmap(), gc, data_image, 0, 0, 0, 0, width, height );
+ // GRG: Do not calculate the points until they are
+ // really needed -- this way we can calculate
+ // just one, instead of four, if d1, d2, d3
+ // or d4 are < gs_Epsilon
- XDestroyImage( data_image );
- XFreeGC( dpy, gc );
+ const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1);
+ const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1);
+ const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2);
+ const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2);
- /*
- // Blit mask
+ // Now interpolate as a weighted average of the four surrounding
+ // points, where the weights are the distances to each of those points
- if (HasMask())
- {
- GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() );
-
- gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
-
- gdk_image_destroy( mask_image );
- gdk_gc_unref( mask_gc );
- }
- */
-
- return bitmap;
-}
+ // If the point is exactly at one point of the grid of the source
+ // image, then don't interpolate -- just assign the pixel
-wxImage::wxImage( const wxBitmap &bitmap )
-{
- wxCHECK_RET( bitmap.Ok(), _T("invalid bitmap") );
+ if (d1 < gs_Epsilon) // d1,d2,d3,d4 are positive -- no need for abs()
+ {
+ unsigned char *p = data[y1] + (3 * x1);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *p;
- Display *dpy = (Display*) wxGetDisplay();
- Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) );
- int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) );
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[y1] + x1);
+ }
+ else if (d2 < gs_Epsilon)
+ {
+ unsigned char *p = data[y1] + (3 * x2);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *p;
- XImage *ximage = XGetImage( dpy,
- (Drawable)bitmap.GetPixmap(),
- 0, 0,
- bitmap.GetWidth(), bitmap.GetHeight(),
- AllPlanes, ZPixmap );
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[y1] + x2);
+ }
+ else if (d3 < gs_Epsilon)
+ {
+ unsigned char *p = data[y2] + (3 * x2);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *p;
- wxCHECK_RET( ximage, _T("couldn't create image") );
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[y2] + x2);
+ }
+ else if (d4 < gs_Epsilon)
+ {
+ unsigned char *p = data[y2] + (3 * x1);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *p;
- Create( bitmap.GetWidth(), bitmap.GetHeight() );
- char unsigned *data = GetData();
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[y2] + x1);
+ }
+ else
+ {
+ // weights for the weighted average are proportional to the inverse of the distance
+ unsigned char *v1 = data[y1] + (3 * x1);
+ unsigned char *v2 = data[y1] + (3 * x2);
+ unsigned char *v3 = data[y2] + (3 * x2);
+ unsigned char *v4 = data[y2] + (3 * x1);
+
+ const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4;
+
+ // GRG: Unrolled.
+
+ *(dst++) = (unsigned char)
+ ( (w1 * *(v1++) + w2 * *(v2++) +
+ w3 * *(v3++) + w4 * *(v4++)) /
+ (w1 + w2 + w3 + w4) );
+ *(dst++) = (unsigned char)
+ ( (w1 * *(v1++) + w2 * *(v2++) +
+ w3 * *(v3++) + w4 * *(v4++)) /
+ (w1 + w2 + w3 + w4) );
+ *(dst++) = (unsigned char)
+ ( (w1 * *v1 + w2 * *v2 +
+ w3 * *v3 + w4 * *v4) /
+ (w1 + w2 + w3 + w4) );
+
+ if (has_alpha)
+ {
+ v1 = alpha[y1] + (x1);
+ v2 = alpha[y1] + (x2);
+ v3 = alpha[y2] + (x2);
+ v4 = alpha[y2] + (x1);
+
+ *(alpha_dst++) = (unsigned char)
+ ( (w1 * *v1 + w2 * *v2 +
+ w3 * *v3 + w4 * *v4) /
+ (w1 + w2 + w3 + w4) );
+ }
+ }
+ }
+ else
+ {
+ *(dst++) = blank_r;
+ *(dst++) = blank_g;
+ *(dst++) = blank_b;
- if (!data)
- {
- XDestroyImage( ximage );
- wxFAIL_MSG( _T("couldn't create image") );
- return;
+ if (has_alpha)
+ *(alpha_dst++) = 0;
+ }
+ }
+ }
}
-
- /*
- GdkImage *gdk_image_mask = (GdkImage*) NULL;
- if (bitmap.GetMask())
+ else // not interpolating
{
- gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(),
- 0, 0,
- bitmap.GetWidth(), bitmap.GetHeight() );
-
- SetMaskColour( 16, 16, 16 ); // anything unlikely and dividable
- }
- */
-
- // Retrieve depth info
-
- XVisualInfo vinfo_template;
- XVisualInfo *vi;
+ for (int y = 0; y < rotated.GetHeight(); y++)
+ {
+ for (x = 0; x < rotated.GetWidth(); x++)
+ {
+ wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0);
- vinfo_template.visual = vis;
- vinfo_template.visualid = XVisualIDFromVisual( vis );
- vinfo_template.depth = bpp;
- int nitem = 0;
+ const int xs = wxCint (src.x); // wxCint rounds to the
+ const int ys = wxCint (src.y); // closest integer
- vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem );
+ if (0 <= xs && xs < GetWidth() &&
+ 0 <= ys && ys < GetHeight())
+ {
+ unsigned char *p = data[ys] + (3 * xs);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *p;
- wxCHECK_RET( vi, _T("no visual") );
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[ys] + (xs));
+ }
+ else
+ {
+ *(dst++) = blank_r;
+ *(dst++) = blank_g;
+ *(dst++) = blank_b;
- if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15;
+ if (has_alpha)
+ *(alpha_dst++) = 255;
+ }
+ }
+ }
+ }
- XFree( vi );
+ delete [] data;
- XColor colors[256];
- if (bpp == 8)
- {
- Colormap cmap = (Colormap)wxTheApp->GetMainColormap( dpy );
+ if (has_alpha)
+ delete [] alpha;
- for (int i = 0; i < 256; i++) colors[i].pixel = i;
- XQueryColors( dpy, cmap, colors, 256 );
- }
+ return rotated;
+}
- long pos = 0;
- for (int j = 0; j < bitmap.GetHeight(); j++)
- {
- for (int i = 0; i < bitmap.GetWidth(); i++)
- {
- int pixel = XGetPixel( ximage, i, j );
- if (bpp <= 8)
- {
- data[pos] = colors[pixel].red >> 8;
- data[pos+1] = colors[pixel].green >> 8;
- data[pos+2] = colors[pixel].blue >> 8;
- } else if (bpp == 15)
- {
- data[pos] = (pixel >> 7) & 0xf8;
- data[pos+1] = (pixel >> 2) & 0xf8;
- data[pos+2] = (pixel << 3) & 0xf8;
- } else if (bpp == 16)
- {
- data[pos] = (pixel >> 8) & 0xf8;
- data[pos+1] = (pixel >> 3) & 0xfc;
- data[pos+2] = (pixel << 3) & 0xf8;
- } else
- {
- data[pos] = (pixel >> 16) & 0xff;
- data[pos+1] = (pixel >> 8) & 0xff;
- data[pos+2] = pixel & 0xff;
- }
- /*
- if (gdk_image_mask)
- {
- int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
- if (mask_pixel == 0)
- {
- data[pos] = 16;
- data[pos+1] = 16;
- data[pos+2] = 16;
- }
- }
- */
- pos += 3;
- }
- }
- XDestroyImage( ximage );
- /*
- if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
- */
-}
-#endif
// A module to allow wxImage initialization/cleanup
// without calling these functions from app.cpp or from
DECLARE_DYNAMIC_CLASS(wxImageModule)
public:
wxImageModule() {}
- bool OnInit() { wxImage::InitStandardHandlers(); return TRUE; };
+ bool OnInit() { wxImage::InitStandardHandlers(); return true; };
void OnExit() { wxImage::CleanUpHandlers(); };
};
IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
+
+
+#endif // wxUSE_IMAGE
projects / wxWidgets.git / blobdiff