#pragma hdrstop
#endif
+#include "wx/defs.h"
+
+#if wxUSE_IMAGE
+
#include "wx/image.h"
#include "wx/bitmap.h"
#include "wx/debug.h"
#include "wx/wfstream.h"
#include "wx/intl.h"
#include "wx/module.h"
+#include "wx/hash.h"
// For memcpy
#include <string.h>
+#include <math.h>
#ifdef __SALFORDC__
#undef FAR
#endif
-#ifdef __WXMSW__
- #include "wx/msw/private.h"
-#endif
//-----------------------------------------------------------------------------
// wxImage
{
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;
+ bool m_static;
+
+#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_ok = FALSE;
+ m_static = FALSE;
}
wxImageRefData::~wxImageRefData()
{
- if (m_data)
+ if ( !m_static )
free( m_data );
+
+ free(m_alpha);
}
wxList wxImage::sm_handlers;
+wxImage wxNullImage;
+
//-----------------------------------------------------------------------------
#define M_IMGDATA ((wxImageRefData *)m_refData)
- IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
+IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
wxImage::wxImage()
{
Create( width, height );
}
-wxImage::wxImage( const wxString& name, long type )
+wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
{
- LoadFile( name, type );
+ Create( width, height, data, static_data );
}
-wxImage::wxImage( const wxString& name, const wxString& mimetype )
+wxImage::wxImage( const wxString& name, long type, int index )
{
- LoadFile( name, mimetype );
+ LoadFile( name, type, index );
+}
+
+wxImage::wxImage( const wxString& name, const wxString& mimetype, int index )
+{
+ 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 )
+ : wxObject()
{
Ref(image);
}
void wxImage::Create( int width, int height )
{
+ UnRef();
+
m_refData = new wxImageRefData();
M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
}
}
+void wxImage::Create( int width, int height, unsigned char* data, bool static_data )
+{
+ UnRef();
+
+ m_refData = new wxImageRefData();
+
+ M_IMGDATA->m_data = data;
+ if (M_IMGDATA->m_data)
+ {
+ M_IMGDATA->m_width = width;
+ M_IMGDATA->m_height = height;
+ M_IMGDATA->m_ok = TRUE;
+ M_IMGDATA->m_static = static_data;
+ }
+ else
+ {
+ UnRef();
+ }
+}
+
void wxImage::Destroy()
{
UnRef();
}
+wxImage wxImage::Copy() const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
+
+ unsigned char *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+ image.SetMask( M_IMGDATA->m_hasMask );
+
+ memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
+
+ return image;
+}
+
+wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
+{
+ if( xFactor == 1 && yFactor == 1 )
+ return Copy() ;
+
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ // can't scale to/from 0 size
+ wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image,
+ wxT("invalid new image size") );
+
+ 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") );
+
+ long width = old_width / xFactor ;
+ long height = old_height / yFactor ;
+
+ image.Create( width , height );
+
+ char unsigned *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ bool hasMask = false ;
+ unsigned char maskRed = 0;
+ unsigned char maskGreen = 0;
+ unsigned char maskBlue =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 );
+ }
+ char unsigned *source_data = M_IMGDATA->m_data;
+ char unsigned *target_data = data;
+
+ 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 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] ;
+ if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue )
+ {
+ avgRed += red ;
+ avgGreen += green ;
+ avgBlue += blue ;
+ counter++ ;
+ }
+ }
+ }
+ if ( counter == 0 )
+ {
+ *(target_data++) = M_IMGDATA->m_maskRed ;
+ *(target_data++) = M_IMGDATA->m_maskGreen ;
+ *(target_data++) = M_IMGDATA->m_maskBlue ;
+ }
+ else
+ {
+ *(target_data++) = avgRed / counter ;
+ *(target_data++) = avgGreen / counter ;
+ *(target_data++) = avgBlue / counter ;
+ }
+ }
+ }
+
+ // In case this is a cursor, make sure the hotspot is scalled 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 image;
+}
+
wxImage wxImage::Scale( int width, int height ) const
{
wxImage image;
wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- wxCHECK_MSG( (width > 0) && (height > 0), image, wxT("invalid image size") );
+ // can't scale to/from 0 size
+ wxCHECK_MSG( (width > 0) && (height > 0), image,
+ wxT("invalid new image size") );
+
+ 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") );
+ 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 );
- char unsigned *data = image.GetData();
+ unsigned char *data = image.GetData();
wxCHECK_MSG( data, image, wxT("unable to create image") );
if (M_IMGDATA->m_hasMask)
- image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+ {
+ image.SetMaskColour( M_IMGDATA->m_maskRed,
+ M_IMGDATA->m_maskGreen,
+ M_IMGDATA->m_maskBlue );
+ }
- long old_height = M_IMGDATA->m_height;
- long old_width = M_IMGDATA->m_width;
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data = data;
- char unsigned *source_data = M_IMGDATA->m_data;
- char unsigned *target_data = data;
+#if 0
+ // This is nonsense, RR.
+
+ // We do (x, y) -> (x, y)*oldSize/newSize but the valid values of x and y
+ // are from 0 to size-1, hence all decrement the sizes
+ long old_old_width = old_width;
+ old_height--;
+ old_width--;
+ height--;
+ width--;
+ for ( long j = 0; j <= height; j++ )
+ {
+ // don't crash for images with height == 1
+ long y_offset = height ? (j * old_height / height)* old_old_width : 0;
+
+ for ( long i = 0; i <= width; i++ )
+ {
+ long x_offset = width ? (i * old_width) / width : 0;
+ memcpy( target_data, source_data + 3*(y_offset + x_offset), 3 );
+ target_data += 3;
+ }
+ }
+#else
for (long j = 0; j < height; j++)
{
long y_offset = (j * old_height / height) * old_width;
target_data += 3;
}
}
+#endif
+
+ // In case this is a cursor, make sure the hotspot is scalled 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 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 );
+
+ unsigned char *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ 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;
+
+ 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;
+ else
+ target_data = data + ((height*(width-1)) + j - (i*height))*3;
+ memcpy( target_data, source_data, 3 );
+ source_data += 3;
+ }
+ }
+
+ 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 );
+
+ unsigned char *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ 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;
+ }
+ }
+ }
+ 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;
+ }
+ }
return image;
}
image.Create( subwidth, subheight );
- char unsigned *subdata = image.GetData(), *data=GetData();
+ unsigned char *subdata = image.GetData(), *data=GetData();
wxCHECK_MSG( subdata, image, wxT("unable to create image") );
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") );
+
+ 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() &&
+ (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") );
- char unsigned *data = GetData();
-
+ 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;
- }
+ {
+ if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1))
+ {
+ data[0] = r2;
+ data[1] = g2;
+ data[2] = b2;
+ }
+ data += 3;
+ }
+}
+
+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 );
+
+ 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;
}
void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
M_IMGDATA->m_data[ pos+2 ] = b;
}
-unsigned char wxImage::GetRed( int x, int y )
+unsigned char wxImage::GetRed( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
return M_IMGDATA->m_data[pos];
}
-unsigned char wxImage::GetGreen( int x, int y )
+unsigned char wxImage::GetGreen( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
return M_IMGDATA->m_data[pos+1];
}
-unsigned char wxImage::GetBlue( int x, int y )
+unsigned char wxImage::GetBlue( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
bool wxImage::Ok() const
{
- return (M_IMGDATA && M_IMGDATA->m_ok);
+ // 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;
}
-char unsigned *wxImage::GetData() const
+unsigned char *wxImage::GetData() const
{
- wxCHECK_MSG( Ok(), (char unsigned *)NULL, wxT("invalid image") );
+ wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") );
return M_IMGDATA->m_data;
}
-void wxImage::SetData( char unsigned *data )
+void wxImage::SetData( unsigned char *data )
{
wxCHECK_RET( Ok(), wxT("invalid image") );
m_refData = newRefData;
}
-void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
+void wxImage::SetData( unsigned char *data, int new_width, int new_height )
{
- wxCHECK_RET( Ok(), wxT("invalid image") );
+ wxImageRefData *newRefData = new wxImageRefData();
- M_IMGDATA->m_maskRed = r;
- M_IMGDATA->m_maskGreen = g;
- M_IMGDATA->m_maskBlue = b;
- M_IMGDATA->m_hasMask = TRUE;
-}
+ 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;
+ }
-unsigned char wxImage::GetMaskRed() const
-{
- wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+ UnRef();
- return M_IMGDATA->m_maskRed;
+ m_refData = newRefData;
}
-unsigned char wxImage::GetMaskGreen() const
+// ----------------------------------------------------------------------------
+// alpha channel support
+// ----------------------------------------------------------------------------
+
+void wxImage::SetAlpha(int x, int y, unsigned char alpha)
{
- wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+ wxCHECK_RET( Ok() && HasAlpha(), wxT("invalid image or no alpha channel") );
- return M_IMGDATA->m_maskGreen;
-}
+ int w = M_IMGDATA->m_width,
+ h = M_IMGDATA->m_height;
-unsigned char wxImage::GetMaskBlue() const
-{
- wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+ wxCHECK_RET( x >=0 && y >= 0 && x < w && y < h, wxT("invalid image index") );
- return M_IMGDATA->m_maskBlue;
+ M_IMGDATA->m_alpha[y*w + x] = alpha;
}
-void wxImage::SetMask( bool mask )
+unsigned char wxImage::GetAlpha(int x, int y)
{
- wxCHECK_RET( Ok(), wxT("invalid image") );
+ wxCHECK_MSG( Ok() && HasAlpha(), 0, wxT("invalid image or no alpha channel") );
+
+ int w = M_IMGDATA->m_width,
+ h = M_IMGDATA->m_height;
+
+ wxCHECK_MSG( x >=0 && y >= 0 && x < w && y < h, 0, wxT("invalid image index") );
+
+ return M_IMGDATA->m_alpha[y*w + x];
+}
+
+void wxImage::SetAlpha( unsigned char *alpha )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ if ( !alpha )
+ {
+ alpha = (unsigned char *)
+ malloc(M_IMGDATA->m_width*M_IMGDATA->m_height*3);
+ }
+
+ delete [] M_IMGDATA->m_alpha;
+ M_IMGDATA->m_alpha = alpha;
+}
+
+unsigned char *wxImage::GetAlpha() const
+{
+ wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") );
+
+ return M_IMGDATA->m_alpha;
+}
+
+// ----------------------------------------------------------------------------
+// mask support
+// ----------------------------------------------------------------------------
+
+void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ M_IMGDATA->m_maskRed = r;
+ M_IMGDATA->m_maskGreen = g;
+ M_IMGDATA->m_maskBlue = b;
+ M_IMGDATA->m_hasMask = TRUE;
+}
+
+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") );
M_IMGDATA->m_hasMask = mask;
}
return M_IMGDATA->m_height;
}
-bool wxImage::LoadFile( const wxString& filename, long type )
+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 Color in image being masked") );
+ return FALSE ;
+ }
+
+ 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;
+ }
+ }
+
+ SetMaskColour(r, g, b);
+ SetMask(TRUE);
+
+ return TRUE;
+}
+
+#if wxUSE_PALETTE
+
+// Palette functions
+
+bool wxImage::HasPalette() const
+{
+ 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") );
+
+ 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") );
+
+ int idx = M_IMGDATA->m_optionNames.Index(name, FALSE);
+ if (idx == wxNOT_FOUND)
+ {
+ 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;
+ }
+}
+
+void wxImage::SetOption(const wxString& name, int value)
+{
+ 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
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ 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);
+}
+
+bool wxImage::LoadFile( const wxString& filename, long type, int index )
{
#if wxUSE_STREAMS
if (wxFileExists(filename))
{
wxFileInputStream stream(filename);
- wxBufferedInputStream bstream( stream );
- return LoadFile(bstream, type);
+ wxBufferedInputStream bstream( stream );
+ return LoadFile(bstream, type, index);
}
else
{
#endif // wxUSE_STREAMS
}
-bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype )
+bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int index )
{
#if wxUSE_STREAMS
if (wxFileExists(filename))
{
wxFileInputStream stream(filename);
- wxBufferedInputStream bstream( stream );
- return LoadFile(bstream, mimetype);
+ wxBufferedInputStream bstream( stream );
+ return LoadFile(bstream, mimetype, index);
}
else
{
#endif // wxUSE_STREAMS
}
-bool wxImage::SaveFile( const wxString& filename, int type )
+
+
+bool wxImage::SaveFile( const wxString& filename ) const
+{
+ 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;
+}
+
+bool wxImage::SaveFile( const wxString& filename, int type ) const
{
#if wxUSE_STREAMS
+ ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
wxFileOutputStream stream(filename);
- if ( stream.LastError() == wxStream_NOERROR )
+ if ( stream.IsOk() )
{
- wxBufferedOutputStream bstream( stream );
+ wxBufferedOutputStream bstream( stream );
return SaveFile(bstream, type);
}
- else
#endif // wxUSE_STREAMS
- return FALSE;
+
+ return FALSE;
}
-bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype )
+bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) const
{
#if wxUSE_STREAMS
+ ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
wxFileOutputStream stream(filename);
- if ( stream.LastError() == wxStream_NOERROR )
+ if ( stream.IsOk() )
{
- wxBufferedOutputStream bstream( stream );
+ wxBufferedOutputStream bstream( stream );
return SaveFile(bstream, mimetype);
}
- else
#endif // wxUSE_STREAMS
- return FALSE;
+
+ return FALSE;
}
bool wxImage::CanRead( const wxString &name )
#endif
}
+int wxImage::GetImageCount( const wxString &name, long type )
+{
+#if wxUSE_STREAMS
+ wxFileInputStream stream(name);
+ if (stream.Ok())
+ return GetImageCount(stream, type);
+#endif
+
+ return 0;
+}
+
#if wxUSE_STREAMS
bool wxImage::CanRead( wxInputStream &stream )
{
- wxList &list=GetHandlers();
+ const wxList& list = GetHandlers();
- for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
+ for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
{
- wxImageHandler *handler=(wxImageHandler*)node->GetData();
- if (handler->CanRead( stream ))
- return TRUE;
+ wxImageHandler *handler=(wxImageHandler*)node->GetData();
+ if (handler->CanRead( stream ))
+ return TRUE;
}
- return FALSE;
+ return FALSE;
+}
+
+int wxImage::GetImageCount( wxInputStream &stream, long type )
+{
+ wxImageHandler *handler;
+
+ if ( type == wxBITMAP_TYPE_ANY )
+ {
+ wxList &list=GetHandlers();
+
+ for (wxList::Node *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;
+ }
+
+ handler = FindHandler(type);
+
+ if ( !handler )
+ {
+ wxLogWarning(_("No image handler for type %d defined."), type);
+ return FALSE;
+ }
+
+ if ( handler->CanRead(stream) )
+ {
+ return handler->GetImageCount(stream);
+ }
+ else
+ {
+ wxLogError(_("Image file is not of type %d."), type);
+ return 0;
+ }
}
-bool wxImage::LoadFile( wxInputStream& stream, long type )
+bool wxImage::LoadFile( wxInputStream& stream, long type, int index )
{
UnRef();
wxImageHandler *handler;
- if (type==wxBITMAP_TYPE_ANY)
+ if ( type == wxBITMAP_TYPE_ANY )
{
wxList &list=GetHandlers();
for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
{
handler=(wxImageHandler*)node->GetData();
- if (handler->CanRead( stream ))
- return handler->LoadFile( this, stream );
+ if ( handler->CanRead(stream) )
+ return handler->LoadFile(this, stream, TRUE/*verbose*/, index);
}
handler = FindHandler(type);
- if (handler == NULL)
+ if (handler == 0)
{
wxLogWarning( _("No image handler for type %d defined."), type );
return FALSE;
}
- return handler->LoadFile( this, stream );
+ return handler->LoadFile(this, stream, TRUE/*verbose*/, index);
}
-bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype )
+bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index )
{
UnRef();
wxImageHandler *handler = FindHandlerMime(mimetype);
- if (handler == NULL)
+ if (handler == 0)
{
wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
return FALSE;
}
- return handler->LoadFile( this, stream );
+ return handler->LoadFile( this, stream, TRUE/*verbose*/, index );
}
-bool wxImage::SaveFile( wxOutputStream& stream, int type )
+bool wxImage::SaveFile( wxOutputStream& stream, int type ) const
{
wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
wxImageHandler *handler = FindHandler(type);
- if (handler == NULL)
+ if (handler == 0)
{
wxLogWarning( _("No image handler for type %d defined."), type );
return FALSE;
}
- return handler->SaveFile( this, stream );
+ return handler->SaveFile( (wxImage*)this, stream );
}
-bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype )
+bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const
{
wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
wxImageHandler *handler = FindHandlerMime(mimetype);
- if (handler == NULL)
+ if (handler == 0)
{
wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
return FALSE;
}
- return handler->SaveFile( this, stream );
+ return handler->SaveFile( (wxImage*)this, stream );
}
#endif // wxUSE_STREAMS
// make sure that the memory will be freed at the program end
sm_handlers.DeleteContents(TRUE);
- sm_handlers.Append( 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 )
// make sure that the memory will be freed at the program end
sm_handlers.DeleteContents(TRUE);
- sm_handlers.Insert( 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 *wxImage::FindHandler( const wxString& name )
{
- wxNode *node = sm_handlers.First();
+ wxNode *node = sm_handlers.GetFirst();
while (node)
{
- wxImageHandler *handler = (wxImageHandler*)node->Data();
+ wxImageHandler *handler = (wxImageHandler*)node->GetData();
if (handler->GetName().Cmp(name) == 0) return handler;
- node = node->Next();
+ node = node->GetNext();
}
- return (wxImageHandler *)NULL;
+ return 0;
}
wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
{
- wxNode *node = sm_handlers.First();
+ wxNode *node = sm_handlers.GetFirst();
while (node)
{
- wxImageHandler *handler = (wxImageHandler*)node->Data();
+ wxImageHandler *handler = (wxImageHandler*)node->GetData();
if ( (handler->GetExtension().Cmp(extension) == 0) &&
(bitmapType == -1 || handler->GetType() == bitmapType) )
return handler;
- node = node->Next();
+ node = node->GetNext();
}
- return (wxImageHandler*)NULL;
+ return 0;
}
wxImageHandler *wxImage::FindHandler( long bitmapType )
{
- wxNode *node = sm_handlers.First();
+ wxNode *node = sm_handlers.GetFirst();
while (node)
{
- wxImageHandler *handler = (wxImageHandler *)node->Data();
+ wxImageHandler *handler = (wxImageHandler *)node->GetData();
if (handler->GetType() == bitmapType) return handler;
- node = node->Next();
+ node = node->GetNext();
}
- return NULL;
+ return 0;
}
wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
{
- wxNode *node = sm_handlers.First();
+ wxNode *node = sm_handlers.GetFirst();
while (node)
{
- wxImageHandler *handler = (wxImageHandler *)node->Data();
+ wxImageHandler *handler = (wxImageHandler *)node->GetData();
if (handler->GetMimeType().IsSameAs(mimetype, FALSE)) return handler;
- node = node->Next();
+ node = node->GetNext();
}
- return NULL;
+ return 0;
}
void wxImage::InitStandardHandlers()
{
- AddHandler( new wxBMPHandler );
+#if wxUSE_STREAMS
+ AddHandler(new wxBMPHandler);
+#endif // wxUSE_STREAMS
}
void wxImage::CleanUpHandlers()
{
- wxNode *node = sm_handlers.First();
+ wxNode *node = sm_handlers.GetFirst();
while (node)
{
- wxImageHandler *handler = (wxImageHandler *)node->Data();
- wxNode *next = node->Next();
+ wxImageHandler *handler = (wxImageHandler *)node->GetData();
+ wxNode *next = node->GetNext();
delete handler;
delete node;
node = next;
return CanRead(stream);
}
- else {
- wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
+ wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
+
+ return FALSE;
+}
+
+bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
+{
+ off_t posOld = stream.TellI();
+ if ( posOld == wxInvalidOffset )
+ {
+ // can't test unseekable stream
+ return FALSE;
+ }
+
+ bool ok = DoCanRead(stream);
+
+ // restore the old position to be able to test other formats and so on
+ if ( stream.SeekI(posOld) == wxInvalidOffset )
+ {
+ wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!"));
+ // reading would fail anyhow as we're not at the right position
return FALSE;
}
-// return FALSE;
+
+ return ok;
}
#endif // wxUSE_STREAMS
+
+
//-----------------------------------------------------------------------------
-// MSW conversion routines
+// Deprecated wxBitmap conversion routines
//-----------------------------------------------------------------------------
-#ifdef __WXMSW__
+#if WXWIN_COMPATIBILITY_2_2 && wxUSE_GUI
+
+#ifdef __WXGTK__
+wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const
+{
+ wxImage mono = this->ConvertToMono( red, green, blue );
+ wxBitmap bitmap( mono, 1 );
+ return bitmap;
+}
+#endif
wxBitmap wxImage::ConvertToBitmap() const
{
- if ( !Ok() )
- return wxNullBitmap;
+ wxBitmap bitmap( *this );
+ return bitmap;
+}
- // sizeLimit is the MS upper limit for the DIB size
-#ifdef WIN32
- int sizeLimit = 1024*768*3;
-#else
- int sizeLimit = 0x7fff ;
-#endif
+wxImage::wxImage( const wxBitmap &bitmap )
+{
+ *this = bitmap.ConvertToImage();
+}
- // width and height of the device-dependent bitmap
- int width = GetWidth();
- int bmpHeight = GetHeight();
-
- // 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 )
- {
- padding = sizeDWORD - lineBoundary;
- bytePerLine += padding;
- }
- // 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, wxT("invalid image") );
- bitmap.SetWidth( width );
- bitmap.SetHeight( bmpHeight );
- bitmap.SetDepth( wxDisplayDepth() );
-
- // create a DIB header
- int headersize = sizeof(BITMAPINFOHEADER);
- BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
- wxCHECK_MSG( lpDIBh, bitmap, wxT("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( wxT("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;
+#endif // WXWIN_COMPATIBILITY_2_2 && wxUSE_GUI
- for( n=0; n<numDIB; n++ )
- {
- 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( 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++ )
+// ----------------------------------------------------------------------------
+// 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);
+
+ while ( find(key) != end() )
+ {
+ // color already used
+ r2++;
+ if ( r2 >= 255 )
{
- 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++ )
+ r2 = 0;
+ g2++;
+ if ( g2 >= 255 )
{
- for(i=0; i<width; i++ )
+ g2 = 0;
+ b2++;
+ if ( b2 >= 255 )
{
- if( (*(ptdata++)!=r) | (*(ptdata++)!=g) | (*(ptdata++)!=b) )
- {
- *(ptbits++) = one;
- *(ptbits++) = one;
- *(ptbits++) = one;
- }
- else
- {
- *(ptbits++) = zero;
- *(ptbits++) = zero;
- *(ptbits++) = zero;
- }
+ wxLogError(_("GetUnusedColour:: No Unused Color in image ") );
+ return FALSE;
}
- 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;
}
- // 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);
-
-#if WXWIN_COMPATIBILITY_2
- // check the wxBitmap object
- bitmap.GetBitmapData()->SetOk();
-#endif // WXWIN_COMPATIBILITY_2
- return bitmap;
+ key = MakeKey(r2, g2, b2);
+ }
+
+ 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
{
- // check the bitmap
- if( !bitmap.Ok() )
- {
- wxFAIL_MSG( wxT("invalid bitmap") );
- return;
- }
+ wxImageHistogram histogram;
- // create an wxImage object
- int width = bitmap.GetWidth();
- int height = bitmap.GetHeight();
- Create( width, height );
- unsigned char *data = GetData();
- if( !data )
- {
- wxFAIL_MSG( wxT("could not allocate data for image") );
- return;
- }
+ ComputeHistogram(histogram);
- // 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 )
- {
- padding = sizeDWORD - lineBoundary;
- bytePerLine += padding;
- }
-
- // create a DIB header
- int headersize = sizeof(BITMAPINFOHEADER);
- BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
- if( !lpDIBh )
- {
- wxFAIL_MSG( wxT("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( wxT("could not allocate data for DIB") );
- free( data );
- free( lpDIBh );
- return;
- }
-
- // 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 );
-
- // copy DIB data into the wxImage object
- int i, j;
- unsigned char *ptdata = data;
- unsigned char *ptbits = lpBits;
- for( i=0; i<height; i++ )
- {
- 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 );
- }
- else
- {
- SetMask( FALSE );
- }
- // free allocated resources
- ::ReleaseDC(NULL, hdc);
- free(lpDIBh);
- free(lpBits);
+ return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2);
}
-#endif
-
-#ifdef __WXMAC__
-#include <PictUtils.h>
-extern CTabHandle wxMacCreateColorTable( int numColors ) ;
-extern void wxMacDestroyColorTable( CTabHandle colors ) ;
-extern void wxMacSetColorTableEntry( CTabHandle newColors , int index , int red , int green , int blue ) ;
-extern GWorldPtr wxMacCreateGWorld( int height , int width , int depth ) ;
-extern void wxMacDestroyGWorld( GWorldPtr gw ) ;
-
-wxBitmap wxImage::ConvertToBitmap() const
-{
- // width and height of the device-dependent bitmap
- int width = GetWidth();
- int height = GetHeight();
-
- // Create picture
-
- wxBitmap bitmap( width , height , wxDisplayDepth() ) ;
-
- // Create mask
-
- if (HasMask())
- {
- /*
- 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 );
- */
- }
-
- // Render
-
- int r_mask = GetMaskRed();
- int g_mask = GetMaskGreen();
- int b_mask = GetMaskBlue();
-
- CGrafPtr origPort ;
- GDHandle origDevice ;
-
- GetGWorld( &origPort , &origDevice ) ;
- SetGWorld( bitmap.GetHBITMAP() , NULL ) ;
-
- register unsigned char* data = GetData();
-
- int index = 0;
- for (int y = 0; y < height; y++)
- {
-#if 0
- unsigned char lastr = 0 ;
- unsigned char lastg = 0 ;
- unsigned char lastb = 0 ;
- RGBColor lastcolor ;
-
- MoveTo( 0 , y ) ;
- for (int x = 0; x < width; x++)
- {
- unsigned char r = data[index++];
- unsigned char g = data[index++];
- unsigned char b = data[index++];
-
- if ( r != lastr || g != lastg || b != lastb )
- {
- lastcolor.red = ( lastr << 8 ) + lastr ;
- lastcolor.green = ( lastg << 8 ) + lastg ;
- lastcolor.blue = ( lastb << 8 ) + lastb ;
- RGBForeColor( &lastcolor ) ;
- LineTo( x , y ) ;
- lastr = r ;
- lastg = g ;
- lastb = b ;
- }
- } // for width
- lastcolor.red = ( lastr << 8 ) + lastr ;
- lastcolor.green = ( lastg << 8 ) + lastg ;
- lastcolor.blue = ( lastb << 8 ) + lastb ;
- RGBForeColor( &lastcolor ) ;
- LineTo( width - 1 , y ) ;
-#else
- for (int x = 0; x < width; x++)
- {
- unsigned char r = data[index++];
- unsigned char g = data[index++];
- unsigned char b = data[index++];
- RGBColor color ;
- color.red = ( r << 8 ) + r ;
- color.green = ( g << 8 ) + g ;
- color.blue = ( b << 8 ) + b ;
- SetCPixel( x , y , &color ) ;
- }
-#endif
- } // for height
-
- SetGWorld( origPort , origDevice ) ;
-
- return bitmap;
-
-}
-
-wxImage::wxImage( const wxBitmap &bitmap )
-{
- // check the bitmap
- if( !bitmap.Ok() )
- {
- wxFAIL_MSG( "invalid bitmap" );
- return;
- }
-
- // create an wxImage object
- int width = bitmap.GetWidth();
- int height = bitmap.GetHeight();
- Create( width, height );
- /*
- unsigned char *data = GetData();
- if( !data )
- {
- wxFAIL_MSG( "could not allocate data for image" );
- return;
- }
-
- // calc the number of bytes per scanline and padding in the DIB
- int bytePerLine = width*3;
- int sizeDWORD = sizeof( DWORD );
- div_t lineBoundary = div( bytePerLine, sizeDWORD );
- int padding = 0;
- if( lineBoundary.rem > 0 )
- {
- padding = sizeDWORD - lineBoundary.rem;
- bytePerLine += padding;
- }
-
- // create a DIB header
- int headersize = sizeof(BITMAPINFOHEADER);
- LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize );
- if( !lpDIBh )
- {
- wxFAIL_MSG( "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( "could not allocate data for DIB" );
- free( data );
- free( lpDIBh );
- return;
- }
-
- // 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 );
-
- // copy DIB data into the wxImage object
- int i, j;
- unsigned char *ptdata = data;
- unsigned char *ptbits = lpBits;
- for( i=0; i<height; i++ )
- {
- 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 );
- }
- else
- {
- SetMask( FALSE );
- }
- // 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
+// 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
{
- wxBitmap bitmap;
-
- wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") );
-
- int width = GetWidth();
- int height = GetHeight();
-
- bitmap.SetHeight( height );
- bitmap.SetWidth( width );
-
- bitmap.SetPixmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, -1 ) );
-
- // Retrieve depth
-
- GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
- if (visual == NULL) visual = gdk_visual_get_system();
- int bpp = visual->depth;
-
- bitmap.SetDepth( bpp );
-
- if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
- if (bpp < 8) bpp = 8;
+ wxHashTable h;
+ wxObject dummy;
+ unsigned char r, g, b;
+ unsigned char *p;
+ unsigned long size, nentries, key;
-#if (GTK_MINOR_VERSION > 0)
+ p = GetData();
+ size = GetWidth() * GetHeight();
+ nentries = 0;
- if (!HasMask() && (bpp > 8))
+ for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++)
{
- static bool s_hasInitialized = FALSE;
+ r = *(p++);
+ g = *(p++);
+ b = *(p++);
+ key = wxImageHistogram::MakeKey(r, g, b);
- if (!s_hasInitialized)
+ if (h.Get(key) == NULL)
{
- gdk_rgb_init();
- s_hasInitialized = TRUE;
+ h.Put(key, &dummy);
+ nentries++;
}
-
- GdkGC *gc = gdk_gc_new( bitmap.GetPixmap() );
-
- gdk_draw_rgb_image( bitmap.GetPixmap(),
- gc,
- 0, 0,
- width, height,
- GDK_RGB_DITHER_NONE,
- GetData(),
- width*3 );
-
- gdk_gc_unref( gc );
-
- return bitmap;
- }
-
-#endif
-
- // Create picture image
-
- GdkImage *data_image =
- gdk_image_new( GDK_IMAGE_FASTEST, gdk_visual_get_system(), width, height );
-
- // Create mask image
-
- GdkImage *mask_image = (GdkImage*) NULL;
-
- if (HasMask())
- {
- 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 );
- }
-
- // Render
-
- enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
- byte_order b_o = RGB;
-
- if (bpp >= 24)
- {
- 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;
- }
-
- int r_mask = GetMaskRed();
- int g_mask = GetMaskGreen();
- int b_mask = GetMaskBlue();
-
- unsigned char* data = GetData();
-
- int index = 0;
- for (int y = 0; y < height; y++)
- {
- 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 );
- }
-
- 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 );
- }
-
- 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);
-
- 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; }
- }
- }
-
- gdk_image_put_pixel( data_image, x, y, pixel );
-
- 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:
- {
- 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 );
- }
- 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 );
}
- return bitmap;
+ return nentries;
}
-wxImage::wxImage( const wxBitmap &bitmap )
-{
- wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") );
-
- GdkImage *gdk_image = (GdkImage*) NULL;
- if (bitmap.GetPixmap())
- {
- gdk_image = gdk_image_get( bitmap.GetPixmap(),
- 0, 0,
- bitmap.GetWidth(), bitmap.GetHeight() );
- } else
- if (bitmap.GetBitmap())
- {
- gdk_image = gdk_image_get( bitmap.GetBitmap(),
- 0, 0,
- bitmap.GetWidth(), bitmap.GetHeight() );
- } else
- {
- wxFAIL_MSG( wxT("Ill-formed bitmap") );
- }
- wxCHECK_RET( gdk_image, wxT("couldn't create image") );
-
- Create( bitmap.GetWidth(), bitmap.GetHeight() );
- char unsigned *data = GetData();
-
- if (!data)
- {
- gdk_image_destroy( gdk_image );
- wxFAIL_MSG( wxT("couldn't create image") );
- return;
- }
-
- 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
- }
-
- int bpp = -1;
- if (bitmap.GetPixmap())
- {
- GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
+unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const
+{
+ unsigned char *p = GetData();
+ unsigned long nentries = 0;
- if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent );
- bpp = visual->depth;
- if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
- }
- if (bitmap.GetBitmap())
- {
- bpp = 1;
- }
+ h.clear();
- GdkColormap *cmap = gtk_widget_get_default_colormap();
+ const unsigned long size = GetWidth() * GetHeight();
- long pos = 0;
- for (int j = 0; j < bitmap.GetHeight(); j++)
+ unsigned char r, g, b;
+ for ( unsigned long n = 0; n < size; n++ )
{
- for (int i = 0; i < bitmap.GetWidth(); i++)
- {
- wxInt32 pixel = gdk_image_get_pixel( gdk_image, i, j );
- if (bpp == 1)
- {
- if (pixel == 0)
- {
- data[pos] = 0;
- data[pos+1] = 0;
- data[pos+2] = 0;
- }
- else
- {
- data[pos] = 255;
- data[pos+1] = 255;
- data[pos+2] = 255;
- }
- } else 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)
- {
-#if (wxBYTE_ORDER == wxBIG_ENDIAN)
- // ?
-#endif
- data[pos] = (pixel >> 7) & 0xf8;
- data[pos+1] = (pixel >> 2) & 0xf8;
- data[pos+2] = (pixel << 3) & 0xf8;
- } else if (bpp == 16)
- {
-#if (wxBYTE_ORDER == wxBIG_ENDIAN)
- // ?
-#endif
- data[pos] = (pixel >> 8) & 0xf8;
- data[pos+1] = (pixel >> 3) & 0xfc;
- data[pos+2] = (pixel << 3) & 0xf8;
- } else
- {
-#if (wxBYTE_ORDER == wxBIG_ENDIAN)
- data[pos] = (pixel) & 0xff; // Red
- data[pos+1] = (pixel >> 8) & 0xff; // Green
- data[pos+2] = (pixel >> 16) & 0xff; // Blue
-#else
- data[pos] = (pixel >> 16) & 0xff;
- data[pos+1] = (pixel >> 8) & 0xff;
- data[pos+2] = pixel & 0xff;
-#endif
- }
+ r = *p++;
+ g = *p++;
+ b = *p++;
- 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;
- }
- }
+ wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)];
- pos += 3;
- }
+ if ( entry.value++ == 0 )
+ entry.index = nentries++;
}
- gdk_image_destroy( gdk_image );
- if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
+ return nentries;
}
-#endif
-
-//-----------------------------------------------------------------------------
-// Motif conversion routines
-//-----------------------------------------------------------------------------
-
-#ifdef __WXMOTIF__
-#ifdef __VMS__
-#pragma message disable nosimpint
-#endif
-#include <Xm/Xm.h>
-#ifdef __VMS__
-#pragma message enable nosimpint
-#endif
-#include "wx/utils.h"
-#include <math.h>
-
/*
+ * Rotation code by Carlos Moreno
+ */
-Date: Wed, 05 Jan 2000 11:45:40 +0100
-From: Frits Boel <boel@niob.knaw.nl>
-To: julian.smart@ukonline.co.uk
-Subject: Patch for Motif ConvertToBitmap
-
-Hi Julian,
-
-I've been working on a wxWin application for image processing. From the
-beginning, I was surprised by the (lack of) speed of ConvertToBitmap,
-till I looked in the source code of image.cpp. I saw that converting a
-wxImage to a bitmap with 8-bit pixels is done with comparing every pixel
-to the 256 colors of the palet. A very time-consuming piece of code!
-
-Because I wanted a faster application, I've made a 'patch' for this. In
-short: every pixel of the image is compared to a sorted list with
-colors. If the color is found in the list, the palette entry is
-returned; if the color is not found, the color palette is searched and
-then the palette entry is returned and the color added to the sorted
-list.
-
-Maybe there is another method for this, namely changing the palette
-itself (if the colors are known, as is the case with tiffs with a
-colormap). I did not look at this, maybe someone else did?
-
-The code of the patch is attached, have a look on it, and maybe you will
-ship it with the next release of wxMotif?
-
-Regards,
+// 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.
-Frits Boel
-Software engineer at Hubrecht Laboratory, The Netherlands.
+static const double gs_Epsilon = 1e-10;
-*/
-
-class wxSearchColor
-{
-public:
- wxSearchColor( void );
- wxSearchColor( int size, XColor *colors );
- ~wxSearchColor( void );
-
- int SearchColor( int r, int g, int b );
-private:
- int AddColor( unsigned int value, int pos );
-
- int size;
- XColor *colors;
- unsigned int *color;
- int *entry;
-
- int bottom;
- int top;
-};
-
-wxSearchColor::wxSearchColor( void )
+static inline int wxCint (double x)
{
- this->size = 0;
- this->colors = (XColor*) NULL;
- this->color = (unsigned int *) NULL;
- this->entry = (int*) NULL;
-
- this->bottom = 0;
- this->top = 0;
+ return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5);
}
-wxSearchColor::wxSearchColor( int size, XColor *colors )
-{
- int i;
- this->size = size;
- this->colors = colors;
- this->color = new unsigned int[size];
- this->entry = new int [size];
-
- for (i = 0; i < this->size; i++ ) {
- this->entry[i] = -1;
- }
- this->bottom = this->top = ( size >> 1 );
-}
+// 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.
-wxSearchColor::~wxSearchColor( void )
+inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0)
{
- if ( this->color ) delete this->color;
- if ( this->entry ) delete this->entry;
+ 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);
}
-int wxSearchColor::SearchColor( int r, int g, int b )
+inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0)
{
- unsigned int value = ( ( ( r * 256 ) + g ) * 256 ) + b;
- int begin = this->bottom;
- int end = this->top;
- int middle;
-
- while ( begin <= end ) {
-
- middle = ( begin + end ) >> 1;
-
- if ( value == this->color[middle] ) {
- return( this->entry[middle] );
- } else if ( value < this->color[middle] ) {
- end = middle - 1;
- } else {
- begin = middle + 1;
- }
-
- }
-
- return AddColor( value, middle );
+ return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0);
}
-int wxSearchColor::AddColor( unsigned int value, int pos )
-{
- int i;
- int pixel = -1;
- int max = 3 * (65536);
- for ( i = 0; i < 256; i++ ) {
- int rdiff = ((value >> 8) & 0xFF00 ) - colors[i].red;
- int gdiff = ((value ) & 0xFF00 ) - colors[i].green;
- int bdiff = ((value << 8) & 0xFF00 ) - colors[i].blue;
- int sum = abs (rdiff) + abs (gdiff) + abs (bdiff);
- if (sum < max) { pixel = i; max = sum; }
- }
-
- if ( this->entry[pos] < 0 ) {
- this->color[pos] = value;
- this->entry[pos] = pixel;
- } else if ( value < this->color[pos] ) {
-
- if ( this->bottom > 0 ) {
- for ( i = this->bottom; i < pos; i++ ) {
- this->color[i-1] = this->color[i];
- this->entry[i-1] = this->entry[i];
- }
- this->bottom--;
- this->color[pos-1] = value;
- this->entry[pos-1] = pixel;
- } else if ( this->top < this->size-1 ) {
- for ( i = this->top; i >= pos; i-- ) {
- this->color[i+1] = this->color[i];
- this->entry[i+1] = this->entry[i];
- }
- this->top++;
- this->color[pos] = value;
- this->entry[pos] = pixel;
- }
-
- } else {
-
- if ( this->top < this->size-1 ) {
- for ( i = this->top; i > pos; i-- ) {
- this->color[i+1] = this->color[i];
- this->entry[i+1] = this->entry[i];
- }
- this->top++;
- this->color[pos+1] = value;
- this->entry[pos+1] = pixel;
- } else if ( this->bottom > 0 ) {
- for ( i = this->bottom; i < pos; i++ ) {
- this->color[i-1] = this->color[i];
- this->entry[i-1] = this->entry[i];
- }
- this->bottom--;
- this->color[pos] = value;
- this->entry[pos] = pixel;
- }
-
- }
-
- return( pixel );
-}
-
-wxBitmap wxImage::ConvertToBitmap() const
+wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const
{
- wxBitmap bitmap;
-
- wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") );
-
- int width = GetWidth();
- int height = GetHeight();
-
- bitmap.SetHeight( height );
- bitmap.SetWidth( width );
-
- Display *dpy = (Display*) wxGetDisplay();
- Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) );
- int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) );
-
- // Create image
-
- 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 );
-
- bitmap.Create( width, height, bpp );
-
- /*
- // Create mask
-
- GdkImage *mask_image = (GdkImage*) NULL;
-
- if (HasMask())
- {
- 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 );
- }
- */
+ int i;
+ angle = -angle; // screen coordinates are a mirror image of "real" coordinates
- // Retrieve depth info
+ // Create pointer-based array to accelerate access to wxImage's data
+ unsigned char ** data = new unsigned char * [GetHeight()];
- XVisualInfo vinfo_template;
- XVisualInfo *vi;
+ data[0] = GetData();
- vinfo_template.visual = vis;
- vinfo_template.visualid = XVisualIDFromVisual( vis );
- vinfo_template.depth = bpp;
- int nitem = 0;
+ for (i = 1; i < GetHeight(); i++)
+ data[i] = data[i - 1] + (3 * 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, wxT("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 x1 = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x)));
+ int y1 = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y)));
+ int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
+ int y2 = (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;
+ wxImage rotated (x2 - x1 + 1, y2 - y1 + 1);
- 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 (x1, y1);
}
- /*
- 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 );
+ // 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 );
}
- wxSearchColor scolor( 256, colors );
- 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 + x1, y + y1, 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)
{
-#if 0 // Old, slower code
- 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
+ // C.M. 2000-02-17: when the point is near the border, special care is required.
+
+ 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
- {
- */
- int max = 3 * (65536);
- for (int i = 0; i < 256; i++)
+ else // else means that x is near one of the borders (0 or width-1)
{
- 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);
}
- /*
- }
- */
-#endif
- // And this is all to get the 'right' color...
- int pixel = scolor.SearchColor( r, g, b );
- 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)
+ if (0 < src.y && src.y < GetHeight() - 1)
{
- 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 = wxCint(floor(src.y));
+ y2 = wxCint(ceil(src.y));
+ }
+ else
+ {
+ y1 = y2 = wxCint (src.y);
}
- XPutPixel( data_image, x, y, pixel );
- }
- default: break;
- }
- } // for
- } // for
-
- // Blit picture
-
- 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 );
-
- XDestroyImage( data_image );
- XFreeGC( dpy, 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 );
- }
- */
-
- return bitmap;
-}
-
-wxImage::wxImage( const wxBitmap &bitmap )
-{
- wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") );
-
- Display *dpy = (Display*) wxGetDisplay();
- Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) );
- int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) );
-
- XImage *ximage = XGetImage( dpy,
- (Drawable)bitmap.GetPixmap(),
- 0, 0,
- bitmap.GetWidth(), bitmap.GetHeight(),
- AllPlanes, ZPixmap );
-
- wxCHECK_RET( ximage, wxT("couldn't create image") );
-
- Create( bitmap.GetWidth(), bitmap.GetHeight() );
- char unsigned *data = GetData();
-
- if (!data)
- {
- XDestroyImage( ximage );
- wxFAIL_MSG( wxT("couldn't create image") );
- return;
- }
-
- /*
- 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
- }
- */
-
- // Retrieve depth info
-
- XVisualInfo vinfo_template;
- XVisualInfo *vi;
-
- vinfo_template.visual = vis;
- vinfo_template.visualid = XVisualIDFromVisual( vis );
- vinfo_template.depth = bpp;
- int nitem = 0;
-
- vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem );
-
- wxCHECK_RET( vi, wxT("no visual") );
-
- if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15;
-
- XFree( vi );
-
- XColor colors[256];
- if (bpp == 8)
- {
- Colormap cmap = (Colormap)wxTheApp->GetMainColormap( dpy );
-
- for (int i = 0; i < 256; i++) colors[i].pixel = i;
- XQueryColors( dpy, cmap, colors, 256 );
- }
-
- 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;
- }
- }
+ // get four points and the distances (square of the distance,
+ // for efficiency reasons) for the interpolation formula
- XDestroyImage( ximage );
- /*
- if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
- */
-}
-#endif
+ // 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
-#ifdef __WXPM__
-// OS/2 Presentation manager conversion routings
+ 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);
-wxBitmap wxImage::ConvertToBitmap() const
-{
- if ( !Ok() )
- return wxNullBitmap;
- wxBitmap bitmap; // remove
-// TODO:
-/*
- int sizeLimit = 1024*768*3;
-
- // width and height of the device-dependent bitmap
- int width = GetWidth();
- int bmpHeight = GetHeight();
-
- // 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 )
- {
- padding = sizeDWORD - lineBoundary;
- bytePerLine += padding;
- }
- // 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, wxT("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, wxT("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( wxT("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;
+ // Now interpolate as a weighted average of the four surrounding
+ // points, where the weights are the distances to each of those points
- for( n=0; n<numDIB; n++ )
- {
- 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;
+ // If the point is exactly at one point of the grid of the source
+ // image, then don't interpolate -- just assign the pixel
- 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++ )
- {
- 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) )
+ if (d1 < gs_Epsilon) // d1,d2,d3,d4 are positive -- no need for abs()
{
- *(ptbits++) = one;
- *(ptbits++) = one;
- *(ptbits++) = one;
+ unsigned char *p = data[y1] + (3 * x1);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
+ else if (d2 < gs_Epsilon)
+ {
+ unsigned char *p = data[y1] + (3 * x2);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
+ else if (d3 < gs_Epsilon)
+ {
+ unsigned char *p = data[y2] + (3 * x2);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
+ else if (d4 < gs_Epsilon)
+ {
+ unsigned char *p = data[y2] + (3 * x1);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
}
else
{
- *(ptbits++) = zero;
- *(ptbits++) = zero;
- *(ptbits++) = zero;
+ // 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) );
}
}
- for( i=0; i< padding; i++ ) *(ptbits++) = zero;
+ else
+ {
+ *(dst++) = blank_r;
+ *(dst++) = blank_g;
+ *(dst++) = blank_b;
+ }
}
- ::StretchDIBits( memdc, 0, origin, width, height,\
- 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
- origin += height;
}
- // create a wxMask object
- wxMask *mask = new wxMask();
- mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
- 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 );
- else
- bitmap.SetOk( FALSE );
-*/
- return bitmap;
-}
-
-wxImage::wxImage( const wxBitmap &bitmap )
-{
- // check the bitmap
- if( !bitmap.Ok() )
- {
- wxFAIL_MSG( wxT("invalid bitmap") );
- return;
- }
-
- // create an wxImage object
- int width = bitmap.GetWidth();
- int height = bitmap.GetHeight();
- Create( width, height );
- unsigned char *data = GetData();
- if( !data )
- {
- wxFAIL_MSG( wxT("could not allocate data for image") );
- return;
}
-
- // 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 )
- {
- padding = sizeDWORD - lineBoundary;
- bytePerLine += padding;
- }
-// TODO:
-/*
- // create a DIB header
- int headersize = sizeof(BITMAPINFOHEADER);
- LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize );
- if( !lpDIBh )
+ else // not interpolating
{
- wxFAIL_MSG( wxT("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( wxT("could not allocate data for DIB") );
- free( data );
- free( lpDIBh );
- return;
- }
-
- // 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 );
-
- // copy DIB data into the wxImage object
- int i, j;
- unsigned char *ptdata = data;
- unsigned char *ptbits = lpBits;
- for( i=0; i<height; i++ )
- {
- 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 (int y = 0; y < rotated.GetHeight(); y++)
{
- for( j=0; j<width; j++ )
+ for (x = 0; x < rotated.GetWidth(); x++)
{
- if( *ptbits != 0 )
- ptdata += 3;
+ wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
+
+ const int xs = wxCint (src.x); // wxCint rounds to the
+ const int ys = wxCint (src.y); // closest integer
+
+ if (0 <= xs && xs < GetWidth() &&
+ 0 <= ys && ys < GetHeight())
+ {
+ unsigned char *p = data[ys] + (3 * xs);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
else
{
- *(ptdata++) = r;
- *(ptdata++) = g;
- *(ptdata++) = b;
+ *(dst++) = blank_r;
+ *(dst++) = blank_g;
+ *(dst++) = blank_b;
}
- ptbits += 3;
}
- ptbits += padding;
}
- SetMaskColour( r, g, b );
- SetMask( TRUE );
- }
- else
- {
- SetMask( FALSE );
}
- // free allocated resources
- ::ReleaseDC(NULL, hdc);
- free(lpDIBh);
- free(lpBits);
-*/
+
+ delete [] data;
+
+ return rotated;
}
-#endif
+
+
+
// A module to allow wxImage initialization/cleanup
// without calling these functions from app.cpp or from
IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
-//-----------------------------------------------------------------------------
-
-// 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 )
-{
- wxHashTable h;
- wxNode *node;
- wxHNode *hnode;
- unsigned char r, g, b, *p;
- unsigned long size, nentries, key;
-
- p = GetData();
- size = GetWidth() * GetHeight();
- nentries = 0;
-
- for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++)
- {
- r = *(p++);
- g = *(p++);
- b = *(p++);
- key = (r << 16) | (g << 8) | b;
-
- hnode = (wxHNode *) h.Get(key);
-
- if (!hnode)
- {
- h.Put(key, (wxObject *)(new wxHNode));
- nentries++;
- }
- }
-
- // delete all HNodes
- h.BeginFind();
- while ((node = h.Next()) != NULL)
- delete (wxHNode *)node->GetData();
-
- return nentries;
-}
-
-
-// GRG, Dic/99
-// Computes the histogram of the image and fills a hash table, indexed
-// with integer keys built as 0xRRGGBB, containing wxHNode objects. Each
-// wxHNode contains an 'index' (useful to build a palette with the image
-// colours) and a 'value', which is the number of pixels in the image with
-// that colour.
-//
-unsigned long wxImage::ComputeHistogram( wxHashTable &h )
-{
- unsigned char r, g, b, *p;
- unsigned long size, nentries, key;
- wxHNode *hnode;
-
- p = GetData();
- size = GetWidth() * GetHeight();
- nentries = 0;
-
- for (unsigned long j = 0; j < size; j++)
- {
- r = *(p++);
- g = *(p++);
- b = *(p++);
- key = (r << 16) | (g << 8) | b;
-
- hnode = (wxHNode *) h.Get(key);
-
- if (hnode)
- hnode->value++;
- else
- {
- hnode = new wxHNode();
- hnode->index = nentries++;
- hnode->value = 1;
-
- h.Put(key, (wxObject *)hnode);
- }
- }
-
- return nentries;
-}
-
-
+#endif // wxUSE_IMAGE
projects / wxWidgets.git / blobdiff