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wxWidgets/src/common/image.cpp
Václav Slavík 14f355c2b5 added support for gcc precompiled headers 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22723 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2003-08-09 12:46:53 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: image.cpp
// Purpose: wxImage
// Author: Robert Roebling
// RCS-ID: $Id$
// Copyright: (c) Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "image.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "wx/defs.h"
#if wxUSE_IMAGE
#include "wx/image.h"
#include "wx/bitmap.h"
#include "wx/debug.h"
#include "wx/log.h"
#include "wx/app.h"
#include "wx/filefn.h"
#include "wx/wfstream.h"
#include "wx/intl.h"
#include "wx/module.h"
#include "wx/hash.h"
#include "wx/utils.h"
// For memcpy
#include <string.h>
#include <math.h>
#ifdef __SALFORDC__
#undef FAR
#endif
//-----------------------------------------------------------------------------
// wxImage
//-----------------------------------------------------------------------------
class wxImageRefData: public wxObjectRefData
{
public:
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 =
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_static )
free( m_data );
free(m_alpha);
}
wxList wxImage::sm_handlers;
wxImage wxNullImage;
//-----------------------------------------------------------------------------
#define M_IMGDATA ((wxImageRefData *)m_refData)
IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
wxImage::wxImage()
{
}
wxImage::wxImage( int width, int height, bool clear )
{
Create( width, height, clear );
}
wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
{
Create( width, height, data, static_data );
}
wxImage::wxImage( const wxString& name, long type, int index )
{
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, int index )
{
LoadFile( stream, type, index );
}
wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index )
{
LoadFile( stream, mimetype, index );
}
#endif // wxUSE_STREAMS
wxImage::wxImage( const wxImage& image )
: wxObject()
{
Ref(image);
}
wxImage::wxImage( const wxImage* image )
{
if (image) Ref(*image);
}
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)
{
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;
}
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;
}
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, false );
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 );
// also copy the image options
wxImageRefData *imgData = (wxImageRefData *)image.m_refData;
imgData->m_optionNames = M_IMGDATA->m_optionNames;
imgData->m_optionValues = M_IMGDATA->m_optionValues;
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, false );
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++) = (unsigned char)(avgRed / counter);
*(target_data++) = (unsigned char)(avgGreen / counter);
*(target_data++) = (unsigned char)(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") );
// 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, false );
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 );
}
unsigned char *source_data = M_IMGDATA->m_data;
unsigned char *target_data = data;
long x_delta = (old_width<<16) / width;
long y_delta = (old_height<<16) / height;
unsigned char* dest_pixel = target_data;
long y = 0;
for ( long j = 0; j < height; j++ )
{
unsigned char* src_line = &source_data[(y>>16)*old_width*3];
long x = 0;
for ( long i = 0; i < width; i++ )
{
unsigned char* src_pixel = &src_line[(x>>16)*3];
dest_pixel[0] = src_pixel[0];
dest_pixel[1] = src_pixel[1];
dest_pixel[2] = src_pixel[2];
dest_pixel += 3;
x += x_delta;
}
y += y_delta;
}
// 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, false );
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, false );
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;
}
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") );
int subwidth=rect.GetWidth();
const int subheight=rect.GetHeight();
image.Create( subwidth, subheight, false );
unsigned char *subdata = image.GetData(), *data=GetData();
wxCHECK_MSG( subdata, 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 );
const int subleft=3*rect.GetLeft();
const int width=3*GetWidth();
subwidth*=3;
data+=rect.GetTop()*width+subleft;
for (long j = 0; j < subheight; ++j)
{
memcpy( subdata, data, subwidth);
subdata+=subwidth;
data+=width;
}
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") );
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::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;
}
void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
{
wxCHECK_RET( Ok(), wxT("invalid image") );
int w = M_IMGDATA->m_width;
int h = M_IMGDATA->m_height;
wxCHECK_RET( (x>=0) && (y>=0) && (x<w) && (y<h), wxT("invalid image index") );
long pos = (y * w + x) * 3;
M_IMGDATA->m_data[ pos ] = r;
M_IMGDATA->m_data[ pos+1 ] = g;
M_IMGDATA->m_data[ pos+2 ] = b;
}
unsigned char wxImage::GetRed( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
int w = M_IMGDATA->m_width;
int h = M_IMGDATA->m_height;
wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, wxT("invalid image index") );
long pos = (y * w + x) * 3;
return M_IMGDATA->m_data[pos];
}
unsigned char wxImage::GetGreen( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
int w = M_IMGDATA->m_width;
int h = M_IMGDATA->m_height;
wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, wxT("invalid image index") );
long pos = (y * w + x) * 3;
return M_IMGDATA->m_data[pos+1];
}
unsigned char wxImage::GetBlue( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
int w = M_IMGDATA->m_width;
int h = M_IMGDATA->m_height;
wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, wxT("invalid image index") );
long pos = (y * w + x) * 3;
return M_IMGDATA->m_data[pos+2];
}
bool wxImage::Ok() 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 )
{
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;
UnRef();
m_refData = newRefData;
}
void wxImage::SetData( unsigned char *data, int new_width, int new_height )
{
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;
}
UnRef();
m_refData = newRefData;
}
// ----------------------------------------------------------------------------
// alpha channel support
// ----------------------------------------------------------------------------
void wxImage::SetAlpha(int x, int y, unsigned char alpha)
{
wxCHECK_RET( Ok() && HasAlpha(), wxT("invalid image or no alpha channel") );
int w = M_IMGDATA->m_width,
h = M_IMGDATA->m_height;
wxCHECK_RET( x >=0 && y >= 0 && x < w && y < h, wxT("invalid image index") );
M_IMGDATA->m_alpha[y*w + x] = alpha;
}
unsigned char wxImage::GetAlpha(int x, int y)
{
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);
}
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;
}
bool wxImage::HasMask() const
{
wxCHECK_MSG( Ok(), false, wxT("invalid image") );
return M_IMGDATA->m_hasMask;
}
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;
}
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, index);
}
else
{
wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
return false;
}
#else // !wxUSE_STREAMS
return false;
#endif // wxUSE_STREAMS
}
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, index);
}
else
{
wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
return false;
}
#else // !wxUSE_STREAMS
return false;
#endif // wxUSE_STREAMS
}
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.IsOk() )
{
wxBufferedOutputStream bstream( stream );
return SaveFile(bstream, type);
}
#endif // wxUSE_STREAMS
return false;
}
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.IsOk() )
{
wxBufferedOutputStream bstream( stream );
return SaveFile(bstream, mimetype);
}
#endif // wxUSE_STREAMS
return false;
}
bool wxImage::CanRead( const wxString &name )
{
#if wxUSE_STREAMS
wxFileInputStream stream(name);
return CanRead(stream);
#else
return false;
#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 )
{
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;
}
return false;
}
int wxImage::GetImageCount( wxInputStream &stream, long type )
{
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;
}
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, int index )
{
UnRef();
m_refData = new wxImageRefData;
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->LoadFile(this, stream, true/*verbose*/, index);
}
wxLogWarning( _("No handler found for image type.") );
return false;
}
handler = FindHandler(type);
if (handler == 0)
{
wxLogWarning( _("No image handler for type %d defined."), type );
return false;
}
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;
}
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 == 0)
{
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 == 0)
{
wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
return false;
}
return handler->SaveFile( (wxImage*)this, stream );
}
#endif // wxUSE_STREAMS
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
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;
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;
}
wxImageHandler *wxImage::FindHandler( long bitmapType )
{
wxList::compatibility_iterator node = sm_handlers.GetFirst();
while (node)
{
wxImageHandler *handler = (wxImageHandler *)node->GetData();
if (handler->GetType() == bitmapType) return handler;
node = node->GetNext();
}
return 0;
}
wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
{
wxList::compatibility_iterator node = sm_handlers.GetFirst();
while (node)
{
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
}
void wxImage::CleanUpHandlers()
{
wxList::compatibility_iterator node = sm_handlers.GetFirst();
while (node)
{
wxImageHandler *handler = (wxImageHandler *)node->GetData();
wxList::compatibility_iterator next = node->GetNext();
delete handler;
node = next;
}
sm_handlers.Clear();
}
wxString wxImage::GetImageExtWildcard()
{
wxString fmts;
wxList& Handlers = wxImage::GetHandlers();
wxList::compatibility_iterator Node = Handlers.GetFirst();
while ( Node )
{
wxImageHandler* Handler = (wxImageHandler*)Node->GetData();
fmts += wxT("*.") + Handler->GetExtension();
Node = Node->GetNext();
if ( Node ) fmts += wxT(";");
}
return wxT("(") + fmts + wxT(")|") + fmts;
}
//-----------------------------------------------------------------------------
// wxImageHandler
//-----------------------------------------------------------------------------
IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject)
#if wxUSE_STREAMS
bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) )
{
return false;
}
bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) )
{
return false;
}
int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) )
{
return 1;
}
bool wxImageHandler::CanRead( const wxString& name )
{
if (wxFileExists(name))
{
wxFileInputStream stream(name);
return CanRead(stream);
}
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 ok;
}
#endif // wxUSE_STREAMS
// ----------------------------------------------------------------------------
// 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 )
{
r2 = 0;
g2++;
if ( g2 >= 255 )
{
g2 = 0;
b2++;
if ( b2 >= 255 )
{
wxLogError(_("GetUnusedColour:: No Unused Color in image ") );
return false;
}
}
}
key = MakeKey(r2, g2, b2);
}
if ( r )
*r = r2;
if ( g )
*g = g2;
if ( b )
*b = b2;
return true;
}
bool
wxImage::FindFirstUnusedColour(unsigned char *r,
unsigned char *g,
unsigned char *b,
unsigned char r2,
unsigned char b2,
unsigned char g2) const
{
wxImageHistogram histogram;
ComputeHistogram(histogram);
return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2);
}
// 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;
p = GetData();
size = GetWidth() * GetHeight();
nentries = 0;
for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++)
{
r = *(p++);
g = *(p++);
b = *(p++);
key = wxImageHistogram::MakeKey(r, g, b);
if (h.Get(key) == NULL)
{
h.Put(key, &dummy);
nentries++;
}
}
return nentries;
}
unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const
{
unsigned char *p = GetData();
unsigned long nentries = 0;
h.clear();
const unsigned long size = GetWidth() * GetHeight();
unsigned char r, g, b;
for ( unsigned long n = 0; n < size; n++ )
{
r = *p++;
g = *p++;
b = *p++;
wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)];
if ( entry.value++ == 0 )
entry.index = nentries++;
}
return nentries;
}
/*
* Rotation code by Carlos Moreno
*/
// 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.
static const double gs_Epsilon = 1e-10;
static inline int wxCint (double x)
{
return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5);
}
// 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.
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);
}
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);
}
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
// 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());
// precompute coefficients for rotation formula
// (sine and cosine of the angle)
const double cos_angle = cos(angle);
const double sin_angle = sin(angle);
// Create new Image to store the result
// First, find rectangle that covers the rotated image; to do that,
// rotate the four corners
const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y);
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);
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)));
wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false);
if (offset_after_rotation != NULL)
{
*offset_after_rotation = wxPoint (x1, y1);
}
// 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();
// 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;
if (HasMask())
{
blank_r = GetMaskRed();
blank_g = GetMaskGreen();
blank_b = GetMaskBlue();
rotated.SetMaskColour( blank_r, blank_g, blank_b );
}
// 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
// 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 y = 0; y < rotated.GetHeight(); y++)
{
for (x = 0; x < rotated.GetWidth(); x++)
{
wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
if (-0.25 < src.x && src.x < GetWidth() - 0.75 &&
-0.25 < src.y && src.y < GetHeight() - 0.75)
{
// 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)
{
x1 = wxCint(floor(src.x));
x2 = wxCint(ceil(src.x));
}
else // else means that x is near one of the borders (0 or width-1)
{
x1 = x2 = wxCint (src.x);
}
if (0 < src.y && src.y < GetHeight() - 1)
{
y1 = wxCint(floor(src.y));
y2 = wxCint(ceil(src.y));
}
else
{
y1 = y2 = wxCint (src.y);
}
// get four points and the distances (square of the distance,
// for efficiency reasons) for the interpolation formula
// 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
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);
// Now interpolate as a weighted average of the four surrounding
// points, where the weights are the distances to each of those points
// If the point is exactly at one point of the grid of the source
// image, then don't interpolate -- just assign the pixel
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++);
}
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
{
// 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) );
}
}
else
{
*(dst++) = blank_r;
*(dst++) = blank_g;
*(dst++) = blank_b;
}
}
}
}
else // not interpolating
{
for (int y = 0; y < rotated.GetHeight(); y++)
{
for (x = 0; x < rotated.GetWidth(); x++)
{
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
{
*(dst++) = blank_r;
*(dst++) = blank_g;
*(dst++) = blank_b;
}
}
}
}
delete [] data;
return rotated;
}
// A module to allow wxImage initialization/cleanup
// without calling these functions from app.cpp or from
// the user's application.
class wxImageModule: public wxModule
{
DECLARE_DYNAMIC_CLASS(wxImageModule)
public:
wxImageModule() {}
bool OnInit() { wxImage::InitStandardHandlers(); return true; };
void OnExit() { wxImage::CleanUpHandlers(); };
};
IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
#endif // wxUSE_IMAGE
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