// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "image.h"
#endif
#include "wx/wfstream.h"
#include "wx/intl.h"
#include "wx/module.h"
+#include "wx/hash.h"
+#include "wx/utils.h"
+#include "wx/math.h"
+
+#if wxUSE_XPM
+#include "wx/xpmdecod.h"
+#endif
// For memcpy
#include <string.h>
-#include <math.h>
#ifdef __SALFORDC__
#undef FAR
{
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_static = FALSE;
+ m_hasMask = false;
+
+ m_ok = false;
+ m_static = false;
}
wxImageRefData::~wxImageRefData()
{
- if (m_data && !m_static)
+ if (!m_static)
+ {
free( m_data );
+ free( m_alpha );
+ }
}
wxList wxImage::sm_handlers;
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 )
+wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
{
- Create( width, height );
+ Create( width, height, data, static_data );
}
-wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
+wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
{
- Create( width, height, data, static_data );
+ Create( width, height, data, alpha, static_data );
}
wxImage::wxImage( const wxString& name, long type, int index )
#endif // wxUSE_STREAMS
wxImage::wxImage( const wxImage& image )
+ : wxObject()
{
Ref(image);
}
if (image) Ref(*image);
}
-void wxImage::Create( int width, int height )
+wxImage::wxImage( const char** xpmData )
+{
+ Create(xpmData);
+}
+
+wxImage::wxImage( char** xpmData )
+{
+ Create((const char**) xpmData);
+}
+
+bool wxImage::Create( const char** xpmData )
+{
+#if wxUSE_XPM
+ UnRef();
+
+ wxXPMDecoder decoder;
+ (*this) = decoder.ReadData(xpmData);
+ return Ok();
+#else
+ return false;
+#endif
+}
+
+bool wxImage::Create( int width, int height, bool clear )
{
UnRef();
m_refData = new wxImageRefData();
M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
- if (M_IMGDATA->m_data)
- {
- for (int l = 0; l < width*height*3; l++) M_IMGDATA->m_data[l] = 0;
-
- M_IMGDATA->m_width = width;
- M_IMGDATA->m_height = height;
- M_IMGDATA->m_ok = TRUE;
- }
- else
+ if (!M_IMGDATA->m_data)
{
UnRef();
+ return false;
}
+
+ if (clear)
+ memset(M_IMGDATA->m_data, 0, width*height*3);
+
+ M_IMGDATA->m_width = width;
+ M_IMGDATA->m_height = height;
+ M_IMGDATA->m_ok = true;
+
+ return true;
}
-void wxImage::Create( int width, int height, unsigned char* data, bool static_data )
+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;
- 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();
- }
+ M_IMGDATA->m_width = width;
+ M_IMGDATA->m_height = height;
+ M_IMGDATA->m_ok = true;
+ M_IMGDATA->m_static = static_data;
+
+ return true;
+}
+
+bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, 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_alpha = alpha;
+ 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()
wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
+ image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
- 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 );
+ 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::Scale( int width, int height ) const
+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( (width > 0) && (height > 0), image,
+ 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") );
- image.Create( width, height );
+ 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 ;
+
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data = data;
+ unsigned char *source_alpha = 0 ;
+ unsigned char *target_alpha = 0 ;
if (M_IMGDATA->m_hasMask)
{
+ hasMask = true ;
+ maskRed = M_IMGDATA->m_maskRed;
+ maskGreen = M_IMGDATA->m_maskGreen;
+ maskBlue =M_IMGDATA->m_maskBlue ;
+
image.SetMaskColour( M_IMGDATA->m_maskRed,
M_IMGDATA->m_maskGreen,
M_IMGDATA->m_maskBlue );
}
+ else
+ {
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ target_alpha = image.GetAlpha() ;
+ }
+ }
- 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 avgAlpha = 0 ;
+ unsigned long counter = 0 ;
+ // determine average
+ for ( int y1 = 0 ; y1 < yFactor ; ++y1 )
+ {
+ long y_offset = (y * yFactor + y1) * old_width;
+ for ( int x1 = 0 ; x1 < xFactor ; ++x1 )
+ {
+ unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ;
+ unsigned char red = pixel[0] ;
+ unsigned char green = pixel[1] ;
+ unsigned char blue = pixel[2] ;
+ unsigned char alpha = 255 ;
+ if ( source_alpha )
+ alpha = *(source_alpha + y_offset + x * xFactor + x1) ;
+ if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue )
+ {
+ if ( alpha > 0 )
+ {
+ avgRed += red ;
+ avgGreen += green ;
+ avgBlue += blue ;
+ }
+ avgAlpha += alpha ;
+ counter++ ;
+ }
+ }
+ }
+ if ( counter == 0 )
+ {
+ *(target_data++) = M_IMGDATA->m_maskRed ;
+ *(target_data++) = M_IMGDATA->m_maskGreen ;
+ *(target_data++) = M_IMGDATA->m_maskBlue ;
+ }
+ else
+ {
+ if ( source_alpha )
+ *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ;
+ *(target_data++) = (unsigned char)(avgRed / counter);
+ *(target_data++) = (unsigned char)(avgGreen / counter);
+ *(target_data++) = (unsigned char)(avgBlue / counter);
+ }
+ }
+ }
+
+ // 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") );
-#if 0
- // This is nonsense, RR.
+ // can't scale to/from 0 size
+ wxCHECK_MSG( (width > 0) && (height > 0), image,
+ wxT("invalid new image size") );
- // 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++ )
+ 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 )
{
- // don't crash for images with height == 1
- long y_offset = height ? (j * old_height / height)* old_old_width : 0;
+ return ShrinkBy( old_width / width , old_height / height ) ;
+ }
+ image.Create( width, height, false );
- for ( long i = 0; i <= width; i++ )
- {
- long x_offset = width ? (i * old_width) / width : 0;
+ unsigned char *data = image.GetData();
- memcpy( target_data, source_data + 3*(y_offset + x_offset), 3 );
- target_data += 3;
- }
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data = data;
+ unsigned char *source_alpha = 0 ;
+ unsigned char *target_alpha = 0 ;
+
+ if (M_IMGDATA->m_hasMask)
+ {
+ image.SetMaskColour( M_IMGDATA->m_maskRed,
+ M_IMGDATA->m_maskGreen,
+ M_IMGDATA->m_maskBlue );
}
-#else
- for (long j = 0; j < height; j++)
+ else
{
- long y_offset = (j * old_height / height) * old_width;
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ target_alpha = image.GetAlpha() ;
+ }
+ }
- for (long i = 0; i < width; i++)
+ 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];
+ unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ;
+
+ long x = 0;
+ for ( long i = 0; i < width; i++ )
{
- memcpy( target_data,
- source_data + 3*(y_offset + ((i * old_width )/ width)),
- 3 );
- target_data += 3;
+ unsigned char* src_pixel = &src_line[(x>>16)*3];
+ unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ;
+ dest_pixel[0] = src_pixel[0];
+ dest_pixel[1] = src_pixel[1];
+ dest_pixel[2] = src_pixel[2];
+ dest_pixel += 3;
+ if ( source_alpha )
+ *(target_alpha++) = *src_alpha_pixel ;
+ x += x_delta;
}
+
+ y += y_delta;
}
-#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;
}
wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width );
+ image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false );
- char unsigned *data = image.GetData();
+ unsigned char *data = image.GetData();
wxCHECK_MSG( data, image, wxT("unable to create image") );
long height = M_IMGDATA->m_height;
long width = M_IMGDATA->m_width;
- char unsigned *source_data = M_IMGDATA->m_data;
- char unsigned *target_data;
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data;
for (long j = 0; j < height; j++)
{
wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
+ image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
- char unsigned *data = image.GetData();
+ unsigned char *data = image.GetData();
wxCHECK_MSG( data, image, wxT("unable to create image") );
long height = M_IMGDATA->m_height;
long width = M_IMGDATA->m_width;
- char unsigned *source_data = M_IMGDATA->m_data;
- char unsigned *target_data;
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data;
if (horizontally)
{
int subwidth=rect.GetWidth();
const int subheight=rect.GetHeight();
- image.Create( subwidth, subheight );
+ image.Create( subwidth, subheight, false );
- 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;
}
+wxImage wxImage::Size( const wxSize& size, const wxPoint& pos,
+ int r_, int g_, int b_ ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+ wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") );
+
+ int width = GetWidth(), height = GetHeight();
+ image.Create(size.GetWidth(), size.GetHeight(), false);
+
+ unsigned char r = (unsigned char)r_;
+ unsigned char g = (unsigned char)g_;
+ unsigned char b = (unsigned char)b_;
+ if ((r_ == -1) && (g_ == -1) && (b_ == -1))
+ {
+ GetOrFindMaskColour( &r, &g, &b );
+ image.SetMaskColour(r, g, b);
+ }
+
+ image.SetRGB(wxRect(), r, g, b);
+
+ wxRect subRect(pos.x, pos.y, width, height);
+ wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight());
+
+ subRect.Intersect(finalRect);
+
+ if (!subRect.IsEmpty())
+ {
+ if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height))
+ image.Paste(*this, pos.x, pos.y);
+ else
+ image.Paste(GetSubImage(subRect), pos.x, pos.y);
+ }
+
+ return image;
+}
+
void wxImage::Paste( const wxImage &image, int x, int y )
{
wxCHECK_RET( Ok(), wxT("invalid image") );
if (height < 1) return;
if ((!HasMask() && !image.HasMask()) ||
+ (HasMask() && !image.HasMask()) ||
((HasMask() && image.HasMask() &&
(GetMaskRed()==image.GetMaskRed()) &&
(GetMaskGreen()==image.GetMaskGreen()) &&
{
wxCHECK_RET( Ok(), wxT("invalid image") );
- char unsigned *data = GetData();
+ unsigned char *data = GetData();
const int w = GetWidth();
const int h = GetHeight();
wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
+ image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
- char unsigned *data = image.GetData();
+ unsigned char *data = image.GetData();
wxCHECK_MSG( data, image, wxT("unable to create image") );
long size = M_IMGDATA->m_height * M_IMGDATA->m_width;
- char unsigned *srcd = M_IMGDATA->m_data;
- char unsigned *tard = image.GetData();
+ unsigned char *srcd = M_IMGDATA->m_data;
+ unsigned char *tard = image.GetData();
for ( long i = 0; i < size; i++, srcd += 3, tard += 3 )
{
M_IMGDATA->m_data[ pos+2 ] = b;
}
+void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ wxRect rect(rect_);
+ wxRect imageRect(0, 0, GetWidth(), GetHeight());
+ if ( rect == wxRect() )
+ {
+ rect = imageRect;
+ }
+ else
+ {
+ wxCHECK_RET( imageRect.Inside(rect.GetTopLeft()) &&
+ imageRect.Inside(rect.GetBottomRight()),
+ wxT("invalid bounding rectangle") );
+ }
+
+ int x1 = rect.GetLeft(),
+ y1 = rect.GetTop(),
+ x2 = rect.GetRight() + 1,
+ y2 = rect.GetBottom() + 1;
+
+ unsigned char *data wxDUMMY_INITIALIZE(NULL);
+ int x, y, width = GetWidth();
+ for (y = y1; y < y2; y++)
+ {
+ data = M_IMGDATA->m_data + (y*width + x1)*3;
+ for (x = x1; x < x2; x++)
+ {
+ *data++ = r;
+ *data++ = g;
+ *data++ = b;
+ }
+ }
+}
+
unsigned char wxImage::GetRed( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
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") );
newRefData->m_width = M_IMGDATA->m_width;
newRefData->m_height = M_IMGDATA->m_height;
newRefData->m_data = data;
- newRefData->m_ok = TRUE;
+ 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;
m_refData = newRefData;
}
-void wxImage::SetData( char unsigned *data, int new_width, int new_height )
+void wxImage::SetData( unsigned char *data, int new_width, int new_height )
{
wxImageRefData *newRefData = new wxImageRefData();
newRefData->m_width = new_width;
newRefData->m_height = new_height;
newRefData->m_data = data;
- newRefData->m_ok = TRUE;
+ 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_width = new_width;
newRefData->m_height = new_height;
newRefData->m_data = data;
- newRefData->m_ok = TRUE;
+ 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) const
+{
+ 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];
+}
+
+bool wxImage::ConvertColourToAlpha( unsigned char r, unsigned char g, unsigned char b )
+{
+ SetAlpha( NULL );
+
+ int w = M_IMGDATA->m_width,
+ h = M_IMGDATA->m_height;
+
+ unsigned char *alpha = GetAlpha();
+ unsigned char *data = GetData();
+
+ int x,y;
+ for (y = 0; y < h; y++)
+ for (x = 0; x < w; x++)
+ {
+ *alpha = *data;
+ alpha++;
+ *data = r;
+ data++;
+ *data = g;
+ data++;
+ *data = b;
+ data++;
+ }
+
+ return true;
+}
+
+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);
+ }
+
+ free(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;
+}
+
+void wxImage::InitAlpha()
+{
+ wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") );
+
+ // initialize memory for alpha channel
+ SetAlpha();
+
+ unsigned char *alpha = M_IMGDATA->m_alpha;
+ const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height;
+
+ static const unsigned char ALPHA_TRANSPARENT = 0;
+ static const unsigned char ALPHA_OPAQUE = 0xff;
+ if ( HasMask() )
+ {
+ // use the mask to initialize the alpha channel.
+ const unsigned char * const alphaEnd = alpha + lenAlpha;
+
+ const unsigned char mr = M_IMGDATA->m_maskRed;
+ const unsigned char mg = M_IMGDATA->m_maskGreen;
+ const unsigned char mb = M_IMGDATA->m_maskBlue;
+ for ( unsigned char *src = M_IMGDATA->m_data;
+ alpha < alphaEnd;
+ src += 3, alpha++ )
+ {
+ *alpha = (src[0] == mr && src[1] == mg && src[2] == mb)
+ ? ALPHA_TRANSPARENT
+ : ALPHA_OPAQUE;
+ }
+
+ M_IMGDATA->m_hasMask = false;
+ }
+ else // no mask
+ {
+ // make the image fully opaque
+ memset(alpha, ALPHA_OPAQUE, lenAlpha);
+ }
+}
+
+// ----------------------------------------------------------------------------
+// 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;
+ M_IMGDATA->m_hasMask = true;
+}
+
+bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const
+{
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ if (M_IMGDATA->m_hasMask)
+ {
+ if (r) *r = M_IMGDATA->m_maskRed;
+ if (g) *g = M_IMGDATA->m_maskGreen;
+ if (b) *b = M_IMGDATA->m_maskBlue;
+ return true;
+ }
+ else
+ {
+ FindFirstUnusedColour(r, g, b);
+ return false;
+ }
}
unsigned char wxImage::GetMaskRed() const
bool wxImage::HasMask() const
{
- wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
return M_IMGDATA->m_hasMask;
}
return M_IMGDATA->m_height;
}
-
-bool wxImage::FindFirstUnusedColour(
- unsigned char *r, unsigned char *g, unsigned char *b,
- unsigned char startR, unsigned char startG, unsigned char startB)
-{
- wxHashTable hTable;
- unsigned long key;
-
- ComputeHistogram( hTable );
-
- unsigned char r2 = startR;
- unsigned char g2 = startG;
- unsigned char b2 = startB;
-
- key = (r2 << 16) | (g2 << 8) | b2;
-
- while ( (wxHNode *) hTable.Get(key) )
- {
- // 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 = (r2 << 16) | (g2 << 8) | b2;
- }
-
- if (r) *r = r2;
- if (g) *g = g2;
- if (b) *b = b2;
-
- return TRUE;
-}
-
-
-bool wxImage::SetMaskFromImage(const wxImage& mask,
+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;
+ 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 ;
+ wxLogError( _("No unused colour in image being masked.") );
+ return false ;
}
-
- char unsigned *imgdata = GetData();
- char unsigned *maskdata = mask.GetData();
+
+ unsigned char *imgdata = GetData();
+ unsigned char *maskdata = mask.GetData();
const int w = GetWidth();
const int h = GetHeight();
}
SetMaskColour(r, g, b);
- SetMask(TRUE);
-
- return TRUE;
+ SetMask(true);
+
+ return true;
+}
+
+bool wxImage::ConvertAlphaToMask(unsigned char threshold)
+{
+ if (!HasAlpha())
+ return true;
+
+ unsigned char mr, mg, mb;
+ if (!FindFirstUnusedColour(&mr, &mg, &mb))
+ {
+ wxLogError( _("No unused colour in image being masked.") );
+ return false;
+ }
+
+ SetMask(true);
+ SetMaskColour(mr, mg, mb);
+
+ unsigned char *imgdata = GetData();
+ unsigned char *alphadata = GetAlpha();
+
+ int w = GetWidth();
+ int h = GetHeight();
+
+ for (int y = 0; y < h; y++)
+ {
+ for (int x = 0; x < w; x++, imgdata += 3, alphadata++)
+ {
+ if (*alphadata < threshold)
+ {
+ imgdata[0] = mr;
+ imgdata[1] = mg;
+ imgdata[2] = mb;
+ }
+ }
+ }
+
+ free(M_IMGDATA->m_alpha);
+ M_IMGDATA->m_alpha = NULL;
+
+ return true;
}
#if wxUSE_PALETTE
bool wxImage::HasPalette() const
{
if (!Ok())
- return FALSE;
+ return false;
return M_IMGDATA->m_palette.Ok();
}
{
wxCHECK_RET( Ok(), wxT("invalid image") );
- int idx = M_IMGDATA->m_optionNames.Index(name, FALSE);
+ int idx = M_IMGDATA->m_optionNames.Index(name, false);
if (idx == wxNOT_FOUND)
{
M_IMGDATA->m_optionNames.Add(name);
{
wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") );
- int idx = M_IMGDATA->m_optionNames.Index(name, FALSE);
+ int idx = M_IMGDATA->m_optionNames.Index(name, false);
if (idx == wxNOT_FOUND)
return wxEmptyString;
else
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") );
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
- return (M_IMGDATA->m_optionNames.Index(name, FALSE) != wxNOT_FOUND);
+ return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND);
}
bool wxImage::LoadFile( const wxString& filename, long type, int index )
{
wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
- return FALSE;
+ return false;
}
#else // !wxUSE_STREAMS
- return FALSE;
+ return false;
#endif // wxUSE_STREAMS
}
{
wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
- return FALSE;
+ return false;
}
#else // !wxUSE_STREAMS
- return FALSE;
+ return false;
#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
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
wxFileOutputStream stream(filename);
- if ( stream.LastError() == wxStream_NOERROR )
+ if ( stream.IsOk() )
{
wxBufferedOutputStream bstream( stream );
return SaveFile(bstream, type);
}
#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
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
wxFileOutputStream stream(filename);
- if ( stream.LastError() == wxStream_NOERROR )
+ if ( stream.IsOk() )
{
wxBufferedOutputStream bstream( stream );
return SaveFile(bstream, mimetype);
}
#endif // wxUSE_STREAMS
- return FALSE;
+ return false;
}
bool wxImage::CanRead( const wxString &name )
wxFileInputStream stream(name);
return CanRead(stream);
#else
- return FALSE;
+ return false;
#endif
}
-int wxImage::GetImagesCount( const wxString &name, long type )
+int wxImage::GetImageCount( const wxString &name, long type )
{
#if wxUSE_STREAMS
wxFileInputStream stream(name);
- return GetImagesCount(stream, type);
-#else
- return 0;
+ 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::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
{
wxImageHandler *handler=(wxImageHandler*)node->GetData();
if (handler->CanRead( stream ))
- return TRUE;
+ return true;
}
- return FALSE;
+ return false;
}
-int wxImage::GetImagesCount( wxInputStream &stream, long type )
+int wxImage::GetImageCount( wxInputStream &stream, long type )
{
wxImageHandler *handler;
{
wxList &list=GetHandlers();
- for (wxList::Node *node = list.GetFirst(); node; node = node->GetNext())
+ for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext())
{
handler=(wxImageHandler*)node->GetData();
if ( handler->CanRead(stream) )
- return handler->GetImagesCount(stream);
+ return handler->GetImageCount(stream);
}
if ( !handler )
{
wxLogWarning(_("No image handler for type %d defined."), type);
- return FALSE;
+ return false;
}
if ( handler->CanRead(stream) )
{
- return handler->GetImagesCount(stream);
+ return handler->GetImageCount(stream);
}
else
{
{
wxList &list=GetHandlers();
- for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() )
+ 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);
+ return handler->LoadFile(this, stream, true/*verbose*/, index);
}
wxLogWarning( _("No handler found for image type.") );
- return FALSE;
+ return false;
}
handler = FindHandler(type);
- if (handler == NULL)
+ if (handler == 0)
{
wxLogWarning( _("No image handler for type %d defined."), type );
- return FALSE;
+ return false;
}
- return handler->LoadFile(this, stream, TRUE/*verbose*/, index);
+ return handler->LoadFile(this, stream, true/*verbose*/, index);
}
bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index )
wxImageHandler *handler = FindHandlerMime(mimetype);
- if (handler == NULL)
+ if (handler == 0)
{
wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
- return FALSE;
+ return false;
}
- return handler->LoadFile( this, stream, index );
+ 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") );
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
wxImageHandler *handler = FindHandler(type);
-
- if (handler == NULL)
+ if ( !handler )
{
wxLogWarning( _("No image handler for type %d defined."), type );
- return FALSE;
+ 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") );
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
wxImageHandler *handler = FindHandlerMime(mimetype);
-
- if (handler == NULL)
+ if ( !handler )
{
wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
- return FALSE;
+ return false;
}
- return handler->SaveFile( this, stream );
+ return handler->SaveFile( (wxImage*)this, stream );
}
#endif // wxUSE_STREAMS
void wxImage::AddHandler( wxImageHandler *handler )
{
- // 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 )
if (handler)
{
sm_handlers.DeleteObject(handler);
- return TRUE;
+ delete handler;
+ return true;
}
else
- return FALSE;
+ return false;
}
wxImageHandler *wxImage::FindHandler( const wxString& name )
{
- wxNode *node = sm_handlers.First();
+ wxList::compatibility_iterator 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();
+ wxList::compatibility_iterator 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();
+ wxList::compatibility_iterator 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();
+ wxList::compatibility_iterator node = sm_handlers.GetFirst();
while (node)
{
- wxImageHandler *handler = (wxImageHandler *)node->Data();
- if (handler->GetMimeType().IsSameAs(mimetype, FALSE)) return handler;
- node = node->Next();
+ wxImageHandler *handler = (wxImageHandler *)node->GetData();
+ if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler;
+ node = node->GetNext();
}
- return NULL;
+ return 0;
}
void wxImage::InitStandardHandlers()
{
+#if wxUSE_STREAMS
AddHandler(new wxBMPHandler);
-#if wxUSE_XPM && !defined(__WXGTK__) && !defined(__WXMOTIF__)
- AddHandler(new wxXPMHandler);
-#endif
+#endif // wxUSE_STREAMS
}
void wxImage::CleanUpHandlers()
{
- wxNode *node = sm_handlers.First();
+ wxList::compatibility_iterator node = sm_handlers.GetFirst();
while (node)
{
- wxImageHandler *handler = (wxImageHandler *)node->Data();
- wxNode *next = node->Next();
+ wxImageHandler *handler = (wxImageHandler *)node->GetData();
+ wxList::compatibility_iterator next = node->GetNext();
delete handler;
- delete node;
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;
}
//-----------------------------------------------------------------------------
#if wxUSE_STREAMS
bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) )
{
- return FALSE;
+ return false;
}
bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) )
{
- return FALSE;
+ return false;
}
-int wxImageHandler::GetImagesCount( wxInputStream& WXUNUSED(stream) )
+int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) )
{
return 1;
}
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;
- }
-// return FALSE;
+ return false;
}
-#endif // wxUSE_STREAMS
-
+bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
+{
+ wxFileOffset posOld = stream.TellI();
+ if ( posOld == wxInvalidOffset )
+ {
+ // can't test unseekable stream
+ return false;
+ }
+ bool ok = DoCanRead(stream);
-//-----------------------------------------------------------------------------
-// wxBitmap convertion routines
-//-----------------------------------------------------------------------------
+ // 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!"));
-#if wxUSE_GUI
+ // reading would fail anyhow as we're not at the right position
+ return false;
+ }
-#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;
+ return ok;
}
-#endif
-wxBitmap wxImage::ConvertToBitmap() const
-{
- wxBitmap bitmap( *this );
- return bitmap;
-}
+#endif // wxUSE_STREAMS
+
+// ----------------------------------------------------------------------------
+// image histogram stuff
+// ----------------------------------------------------------------------------
-wxImage::wxImage( const wxBitmap &bitmap )
+bool
+wxImageHistogram::FindFirstUnusedColour(unsigned char *r,
+ unsigned char *g,
+ unsigned char *b,
+ unsigned char r2,
+ unsigned char b2,
+ unsigned char g2) const
{
- *this = bitmap.ConvertToImage();
-}
+ unsigned long key = MakeKey(r2, g2, b2);
-#endif
+ while ( find(key) != end() )
+ {
+ // color already used
+ r2++;
+ if ( r2 >= 255 )
+ {
+ r2 = 0;
+ g2++;
+ if ( g2 >= 255 )
+ {
+ g2 = 0;
+ b2++;
+ if ( b2 >= 255 )
+ {
+ wxLogError(_("No unused colour in image.") );
+ return false;
+ }
+ }
+ }
+ key = MakeKey(r2, g2, b2);
+ }
+ if ( r )
+ *r = r2;
+ if ( g )
+ *g = g2;
+ if ( b )
+ *b = b2;
-// A module to allow wxImage initialization/cleanup
-// without calling these functions from app.cpp or from
-// the user's application.
+ return true;
+}
-class wxImageModule: public wxModule
+bool
+wxImage::FindFirstUnusedColour(unsigned char *r,
+ unsigned char *g,
+ unsigned char *b,
+ unsigned char r2,
+ unsigned char b2,
+ unsigned char g2) const
{
-DECLARE_DYNAMIC_CLASS(wxImageModule)
-public:
- wxImageModule() {}
- bool OnInit() { wxImage::InitStandardHandlers(); return TRUE; };
- void OnExit() { wxImage::CleanUpHandlers(); };
-};
+ wxImageHistogram histogram;
-IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
+ ComputeHistogram(histogram);
+
+ return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2);
+}
-//-----------------------------------------------------------------------------
// GRG, Dic/99
// Counts and returns the number of different colours. Optionally stops
// 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 )
+unsigned long wxImage::CountColours( unsigned long stopafter ) const
{
wxHashTable h;
wxObject dummy;
r = *(p++);
g = *(p++);
b = *(p++);
- key = (r << 16) | (g << 8) | b;
+ key = wxImageHistogram::MakeKey(r, g, b);
if (h.Get(key) == NULL)
{
}
-// 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 long wxImage::ComputeHistogram( wxImageHistogram &h ) const
{
- unsigned char r, g, b;
- unsigned char *p;
- unsigned long size, nentries, key;
- wxHNode *hnode;
+ unsigned char *p = GetData();
+ unsigned long nentries = 0;
- p = GetData();
- size = GetWidth() * GetHeight();
- nentries = 0;
+ h.clear();
- for (unsigned long j = 0; j < size; j++)
- {
- r = *(p++);
- g = *(p++);
- b = *(p++);
- key = (r << 16) | (g << 8) | b;
+ const unsigned long size = GetWidth() * GetHeight();
- hnode = (wxHNode *) h.Get(key);
+ unsigned char r, g, b;
+ for ( unsigned long n = 0; n < size; n++ )
+ {
+ r = *p++;
+ g = *p++;
+ b = *p++;
- if (hnode)
- hnode->value++;
- else
- {
- hnode = new wxHNode();
- hnode->index = nentries++;
- hnode->value = 1;
+ wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)];
- h.Put(key, (wxObject *)hnode);
- }
+ if ( entry.value++ == 0 )
+ entry.index = nentries++;
}
return nentries;
int i;
angle = -angle; // screen coordinates are a mirror image of "real" coordinates
+ bool has_alpha = HasAlpha();
+
// 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());
+ // Same for alpha channel
+ unsigned char ** alpha = NULL;
+ if (has_alpha)
+ {
+ alpha = new unsigned char * [GetHeight()];
+ alpha[0] = GetAlpha();
+ for (i = 1; i < GetHeight(); i++)
+ alpha[i] = alpha[i - 1] + GetWidth();
+ }
+
// precompute coefficients for rotation formula
// (sine and cosine of the angle)
const double cos_angle = cos(angle);
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);
+ // Create rotated image
+ wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false);
+ // With alpha channel
+ if (has_alpha)
+ rotated.SetAlpha();
if (offset_after_rotation != NULL)
{
//
unsigned char * dst = rotated.GetData();
+ unsigned char * alpha_dst = NULL;
+ if (has_alpha)
+ alpha_dst = rotated.GetAlpha();
+
// GRG: if the original image has a mask, use its RGB values
// as the blank pixel, else, fall back to default (black).
//
unsigned char *p = data[y1] + (3 * x1);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ {
+ unsigned char *p = alpha[y1] + x1;
+ *(alpha_dst++) = *p;
+ }
}
else if (d2 < gs_Epsilon)
{
unsigned char *p = data[y1] + (3 * x2);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ {
+ unsigned char *p = alpha[y1] + x2;
+ *(alpha_dst++) = *p;
+ }
}
else if (d3 < gs_Epsilon)
{
unsigned char *p = data[y2] + (3 * x2);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ {
+ unsigned char *p = alpha[y2] + x2;
+ *(alpha_dst++) = *p;
+ }
}
else if (d4 < gs_Epsilon)
{
unsigned char *p = data[y2] + (3 * x1);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ {
+ unsigned char *p = alpha[y2] + x1;
+ *(alpha_dst++) = *p;
+ }
}
else
{
w3 * *(v3++) + w4 * *(v4++)) /
(w1 + w2 + w3 + w4) );
*(dst++) = (unsigned char)
- ( (w1 * *(v1++) + w2 * *(v2++) +
- w3 * *(v3++) + w4 * *(v4++)) /
+ ( (w1 * *v1 + w2 * *v2 +
+ w3 * *v3 + w4 * *v4) /
(w1 + w2 + w3 + w4) );
+
+ if (has_alpha)
+ {
+ unsigned char *v1 = alpha[y1] + (x1);
+ unsigned char *v2 = alpha[y1] + (x2);
+ unsigned char *v3 = alpha[y2] + (x2);
+ unsigned char *v4 = alpha[y2] + (x1);
+
+ *(alpha_dst++) = (unsigned char)
+ ( (w1 * *v1 + w2 * *v2 +
+ w3 * *v3 + w4 * *v4) /
+ (w1 + w2 + w3 + w4) );
+ }
}
}
else
*(dst++) = blank_r;
*(dst++) = blank_g;
*(dst++) = blank_b;
+
+ if (has_alpha)
+ *(alpha_dst++) = 0;
}
}
}
unsigned char *p = data[ys] + (3 * xs);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ {
+ unsigned char *p = alpha[ys] + (xs);
+ *(alpha_dst++) = *p;
+ }
}
else
{
*(dst++) = blank_r;
*(dst++) = blank_g;
*(dst++) = blank_b;
+
+ if (has_alpha)
+ *(alpha_dst++) = 255;
}
}
}
delete [] data;
+ if (has_alpha)
+ delete [] alpha;
+
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
projects / wxWidgets.git / blobdiff