/////////////////////////////////////////////////////////////////////////////
-// Name: image.cpp
+// Name: src/common/image.cpp
// Purpose: wxImage
// Author: Robert Roebling
// RCS-ID: $Id$
// 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"
#include "wx/module.h"
#include "wx/hash.h"
#include "wx/utils.h"
+#include "wx/math.h"
-// For memcpy
-#include <string.h>
-#include <math.h>
-
-#ifdef __SALFORDC__
- #undef FAR
+#if wxUSE_XPM
+#include "wx/xpmdecod.h"
#endif
+// For memcpy
+#include <string.h>
//-----------------------------------------------------------------------------
// wxImage
unsigned char *m_alpha;
bool m_ok;
+
+ // if true, m_data is pointer to static data and shouldn't be freed
bool m_static;
+ // same as m_static but for m_alpha
+ bool m_staticAlpha;
+
#if wxUSE_PALETTE
wxPalette m_palette;
#endif // wxUSE_PALETTE
m_hasMask = false;
m_ok = false;
- m_static = false;
+ m_static =
+ m_staticAlpha = false;
}
wxImageRefData::~wxImageRefData()
{
if ( !m_static )
free( m_data );
-
- free(m_alpha);
+ if ( !m_staticAlpha )
+ free( m_alpha );
}
wxList wxImage::sm_handlers;
Create( width, height, data, static_data );
}
+wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
+{
+ Create( width, height, data, alpha, static_data );
+}
+
wxImage::wxImage( const wxString& name, long type, int index )
{
LoadFile( name, type, index );
if (image) Ref(*image);
}
+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();
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()
{
UnRef();
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 ;
M_IMGDATA->m_maskGreen,
M_IMGDATA->m_maskBlue );
}
- char unsigned *source_data = M_IMGDATA->m_data;
- char unsigned *target_data = data;
+ else
+ {
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ target_alpha = image.GetAlpha() ;
+ }
+ }
for (long y = 0; y < height; y++)
{
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 )
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 )
{
- avgRed += red ;
- avgGreen += green ;
- avgBlue += blue ;
+ if ( alpha > 0 )
+ {
+ avgRed += red ;
+ avgGreen += green ;
+ avgBlue += blue ;
+ }
+ avgAlpha += alpha ;
counter++ ;
}
}
}
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);
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 );
}
-
- unsigned char *source_data = M_IMGDATA->m_data;
- unsigned char *target_data = data;
+ else
+ {
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ target_alpha = image.GetAlpha() ;
+ }
+ }
long x_delta = (old_width<<16) / width;
long y_delta = (old_height<<16) / height;
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++ )
{
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;
}
wxCHECK_MSG( data, image, wxT("unable to create image") );
+ unsigned char *source_data = M_IMGDATA->m_data;
+ unsigned char *target_data;
+ unsigned char *alpha_data = 0 ;
+ unsigned char *source_alpha = 0 ;
+ unsigned char *target_alpha = 0 ;
+
if (M_IMGDATA->m_hasMask)
+ {
image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+ }
+ else
+ {
+ source_alpha = M_IMGDATA->m_alpha ;
+ if ( source_alpha )
+ {
+ image.SetAlpha() ;
+ alpha_data = image.GetAlpha() ;
+ }
+ }
long height = M_IMGDATA->m_height;
long width = M_IMGDATA->m_width;
- 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;
+ if(source_alpha)
+ target_alpha = alpha_data + (((i+1)*height) - j - 1);
+ }
else
+ {
target_data = data + ((height*(width-1)) + j - (i*height))*3;
+ if(source_alpha)
+ target_alpha = alpha_data + ((height*(width-1)) + j - (i*height));
+ }
memcpy( target_data, source_data, 3 );
source_data += 3;
+
+ if(source_alpha)
+ {
+ memcpy( target_alpha, source_alpha, 1 );
+ source_alpha += 1;
+ }
}
}
return image;
}
+wxImage wxImage::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()) &&
return image;
}
-void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
+int wxImage::GetWidth() const
{
- wxCHECK_RET( Ok(), wxT("invalid image") );
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
- int w = M_IMGDATA->m_width;
- int h = M_IMGDATA->m_height;
+ return M_IMGDATA->m_width;
+}
- wxCHECK_RET( (x>=0) && (y>=0) && (x<w) && (y<h), wxT("invalid image index") );
+int wxImage::GetHeight() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
- long pos = (y * w + x) * 3;
+ return M_IMGDATA->m_height;
+}
+
+long wxImage::XYToIndex(int x, int y) const
+{
+ if ( Ok() &&
+ x >= 0 && y >= 0 &&
+ x < M_IMGDATA->m_width && y < M_IMGDATA->m_height )
+ {
+ return y*M_IMGDATA->m_width + x;
+ }
+
+ return -1;
+}
+
+void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
+{
+ long pos = XYToIndex(x, y);
+ wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
+
+ pos *= 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
+void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b )
{
- wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+ wxCHECK_RET( Ok(), wxT("invalid image") );
- int w = M_IMGDATA->m_width;
- int h = M_IMGDATA->m_height;
+ 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;
+ }
+ }
+}
- wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, wxT("invalid image index") );
+unsigned char wxImage::GetRed( int x, int y ) const
+{
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
- long pos = (y * w + x) * 3;
+ pos *= 3;
return M_IMGDATA->m_data[pos];
}
unsigned char wxImage::GetGreen( int x, int y ) const
{
- wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
- 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;
+ pos *= 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 = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
- long pos = (y * w + x) * 3;
+ pos *= 3;
return M_IMGDATA->m_data[pos+2];
}
return M_IMGDATA->m_data;
}
-void wxImage::SetData( unsigned char *data )
+void wxImage::SetData( unsigned char *data, bool static_data )
{
wxCHECK_RET( Ok(), wxT("invalid image") );
newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
newRefData->m_hasMask = M_IMGDATA->m_hasMask;
+ newRefData->m_static = static_data;
UnRef();
m_refData = newRefData;
}
-void wxImage::SetData( unsigned char *data, int new_width, int new_height )
+void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data )
{
wxImageRefData *newRefData = new wxImageRefData();
newRefData->m_data = data;
newRefData->m_ok = true;
}
+ newRefData->m_static = static_data;
UnRef();
void wxImage::SetAlpha(int x, int y, unsigned char alpha)
{
- wxCHECK_RET( Ok() && HasAlpha(), wxT("invalid image or no alpha channel") );
+ wxCHECK_RET( HasAlpha(), wxT("no alpha channel") );
- int w = M_IMGDATA->m_width,
- h = M_IMGDATA->m_height;
+ long pos = XYToIndex(x, y);
+ wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
- wxCHECK_RET( x >=0 && y >= 0 && x < w && y < h, wxT("invalid image index") );
-
- M_IMGDATA->m_alpha[y*w + x] = alpha;
+ M_IMGDATA->m_alpha[pos] = alpha;
}
unsigned char wxImage::GetAlpha(int x, int y) const
{
- wxCHECK_MSG( Ok() && HasAlpha(), 0, wxT("invalid image or no alpha channel") );
+ wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") );
+
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
- int w = M_IMGDATA->m_width,
- h = M_IMGDATA->m_height;
+ return M_IMGDATA->m_alpha[pos];
+}
+
+bool
+wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b)
+{
+ SetAlpha(NULL);
+
+ const int w = M_IMGDATA->m_width;
+ const int h = M_IMGDATA->m_height;
+
+ unsigned char *alpha = GetAlpha();
+ unsigned char *data = GetData();
- wxCHECK_MSG( x >=0 && y >= 0 && x < w && y < h, 0, wxT("invalid image index") );
+ for ( int y = 0; y < h; y++ )
+ {
+ for ( int x = 0; x < w; x++ )
+ {
+ *alpha++ = *data;
+ *data++ = r;
+ *data++ = g;
+ *data++ = b;
+ }
+ }
- return M_IMGDATA->m_alpha[y*w + x];
+ return true;
}
-void wxImage::SetAlpha( unsigned char *alpha )
+void wxImage::SetAlpha( unsigned char *alpha, bool static_data )
{
wxCHECK_RET( Ok(), wxT("invalid image") );
free(M_IMGDATA->m_alpha);
M_IMGDATA->m_alpha = alpha;
+ M_IMGDATA->m_staticAlpha = static_data;
}
unsigned char *wxImage::GetAlpha() const
return M_IMGDATA->m_alpha;
}
+void wxImage::InitAlpha()
+{
+ wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") );
+
+ // initialize memory for alpha channel
+ SetAlpha();
+
+ unsigned char *alpha = M_IMGDATA->m_alpha;
+ const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height;
+
+ if ( HasMask() )
+ {
+ // use the mask to initialize the alpha channel.
+ const unsigned char * const alphaEnd = alpha + lenAlpha;
+
+ const unsigned char mr = M_IMGDATA->m_maskRed;
+ const unsigned char mg = M_IMGDATA->m_maskGreen;
+ const unsigned char mb = M_IMGDATA->m_maskBlue;
+ for ( unsigned char *src = M_IMGDATA->m_data;
+ alpha < alphaEnd;
+ src += 3, alpha++ )
+ {
+ *alpha = (src[0] == mr && src[1] == mg && src[2] == mb)
+ ? wxIMAGE_ALPHA_TRANSPARENT
+ : wxIMAGE_ALPHA_OPAQUE;
+ }
+
+ M_IMGDATA->m_hasMask = false;
+ }
+ else // no mask
+ {
+ // make the image fully opaque
+ memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha);
+ }
+}
+
// ----------------------------------------------------------------------------
// mask support
// ----------------------------------------------------------------------------
M_IMGDATA->m_hasMask = true;
}
+bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const
+{
+ wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+ if (M_IMGDATA->m_hasMask)
+ {
+ if (r) *r = M_IMGDATA->m_maskRed;
+ if (g) *g = M_IMGDATA->m_maskGreen;
+ if (b) *b = M_IMGDATA->m_maskBlue;
+ return true;
+ }
+ else
+ {
+ FindFirstUnusedColour(r, g, b);
+ return false;
+ }
+}
+
unsigned char wxImage::GetMaskRed() const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
return M_IMGDATA->m_hasMask;
}
-int wxImage::GetWidth() const
+bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const
{
- wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+ long pos = XYToIndex(x, y);
+ wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") );
- return M_IMGDATA->m_width;
-}
+ // check mask
+ if ( M_IMGDATA->m_hasMask )
+ {
+ const unsigned char *p = M_IMGDATA->m_data + 3*pos;
+ if ( p[0] == M_IMGDATA->m_maskRed &&
+ p[1] == M_IMGDATA->m_maskGreen &&
+ p[2] == M_IMGDATA->m_maskBlue )
+ {
+ return true;
+ }
+ }
-int wxImage::GetHeight() const
-{
- wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+ // then check alpha
+ if ( M_IMGDATA->m_alpha )
+ {
+ if ( M_IMGDATA->m_alpha[pos] < threshold )
+ {
+ // transparent enough
+ return true;
+ }
+ }
- return M_IMGDATA->m_height;
+ // not transparent
+ return false;
}
bool wxImage::SetMaskFromImage(const wxImage& mask,
return true;
}
-#if wxUSE_PALETTE
-
+// ----------------------------------------------------------------------------
// Palette functions
+// ----------------------------------------------------------------------------
+
+#if wxUSE_PALETTE
bool wxImage::HasPalette() const
{
#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 wxImage::GetOptionInt(const wxString& name) const
{
- wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
-
return wxAtoi(GetOption(name));
}
return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND);
}
+// ----------------------------------------------------------------------------
+// image I/O
+// ----------------------------------------------------------------------------
+
bool wxImage::LoadFile( const wxString& filename, long type, int index )
{
#if wxUSE_STREAMS
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);
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);
return false;
}
- return handler->LoadFile(this, stream, true/*verbose*/, index);
+ if (!handler->CanRead(stream))
+ {
+ wxLogError(_("Image file is not of type %d."), type);
+ return false;
+ }
+ else
+ return handler->LoadFile(this, stream, true/*verbose*/, index);
}
bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index )
return false;
}
- return handler->LoadFile( this, stream, true/*verbose*/, index );
+ if (!handler->CanRead(stream))
+ {
+ wxLogError(_("Image file is not of type %s."), (const wxChar*) mimetype);
+ return false;
+ }
+ else
+ return handler->LoadFile( this, stream, true/*verbose*/, index );
}
bool wxImage::SaveFile( wxOutputStream& stream, int type ) const
wxCHECK_MSG( Ok(), false, wxT("invalid image") );
wxImageHandler *handler = FindHandler(type);
-
- if (handler == 0)
+ if ( !handler )
{
wxLogWarning( _("No image handler for type %d defined."), type );
wxCHECK_MSG( Ok(), false, wxT("invalid image") );
wxImageHandler *handler = FindHandlerMime(mimetype);
-
- if (handler == 0)
+ if ( !handler )
{
wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
}
#endif // wxUSE_STREAMS
+// ----------------------------------------------------------------------------
+// image I/O handlers
+// ----------------------------------------------------------------------------
+
void wxImage::AddHandler( wxImageHandler *handler )
{
// Check for an existing handler of the type being added.
return wxT("(") + fmts + wxT(")|") + fmts;
}
+wxImage::HSVValue wxImage::RGBtoHSV(const RGBValue& rgb)
+{
+ const double red = rgb.red / 255.0,
+ green = rgb.green / 255.0,
+ blue = rgb.blue / 255.0;
+
+ // find the min and max intensity (and remember which one was it for the
+ // latter)
+ double minimumRGB = red;
+ if ( green < minimumRGB )
+ minimumRGB = green;
+ if ( blue < minimumRGB )
+ minimumRGB = blue;
+
+ enum { RED, GREEN, BLUE } chMax = RED;
+ double maximumRGB = red;
+ if ( green > maximumRGB )
+ {
+ chMax = GREEN;
+ maximumRGB = green;
+ }
+ if ( blue > maximumRGB )
+ {
+ chMax = BLUE;
+ maximumRGB = blue;
+ }
+
+ const double value = maximumRGB;
+
+ double hue = 0.0, saturation;
+ const double deltaRGB = maximumRGB - minimumRGB;
+ if ( wxIsNullDouble(deltaRGB) )
+ {
+ // Gray has no color
+ hue = 0.0;
+ saturation = 0.0;
+ }
+ else
+ {
+ switch ( chMax )
+ {
+ case RED:
+ hue = (green - blue) / deltaRGB;
+ break;
+
+ case GREEN:
+ hue = 2.0 + (blue - red) / deltaRGB;
+ break;
+
+ case BLUE:
+ hue = 4.0 + (red - green) / deltaRGB;
+ break;
+
+ default:
+ wxFAIL_MSG(wxT("hue not specified"));
+ break;
+ }
+
+ hue /= 6.0;
+
+ if ( hue < 0.0 )
+ hue += 1.0;
+
+ saturation = deltaRGB / maximumRGB;
+ }
+
+ return HSVValue(hue, saturation, value);
+}
+
+wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv)
+{
+ double red, green, blue;
+
+ if ( wxIsNullDouble(hsv.saturation) )
+ {
+ // Grey
+ red = hsv.value;
+ green = hsv.value;
+ blue = hsv.value;
+ }
+ else // not grey
+ {
+ double hue = hsv.hue * 6.0; // sector 0 to 5
+ int i = (int)floor(hue);
+ double f = hue - i; // fractional part of h
+ double p = hsv.value * (1.0 - hsv.saturation);
+
+ switch (i)
+ {
+ case 0:
+ red = hsv.value;
+ green = hsv.value * (1.0 - hsv.saturation * (1.0 - f));
+ blue = p;
+ break;
+
+ case 1:
+ red = hsv.value * (1.0 - hsv.saturation * f);
+ green = hsv.value;
+ blue = p;
+ break;
+
+ case 2:
+ red = p;
+ green = hsv.value;
+ blue = hsv.value * (1.0 - hsv.saturation * (1.0 - f));
+ break;
+
+ case 3:
+ red = p;
+ green = hsv.value * (1.0 - hsv.saturation * f);
+ blue = hsv.value;
+ break;
+
+ case 4:
+ red = hsv.value * (1.0 - hsv.saturation * (1.0 - f));
+ green = p;
+ blue = hsv.value;
+ break;
+
+ default: // case 5:
+ red = hsv.value;
+ green = p;
+ blue = hsv.value * (1.0 - hsv.saturation * f);
+ break;
+ }
+ }
+
+ return RGBValue((unsigned char)(red * 255.0),
+ (unsigned char)(green * 255.0),
+ (unsigned char)(blue * 255.0));
+}
+
+/*
+ * Rotates the hue of each pixel of the image. angle is a double in the range
+ * -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees
+ */
+void wxImage::RotateHue(double angle)
+{
+ unsigned char *srcBytePtr;
+ unsigned char *dstBytePtr;
+ unsigned long count;
+ wxImage::HSVValue hsv;
+ wxImage::RGBValue rgb;
+
+ wxASSERT (angle >= -1.0 && angle <= 1.0);
+ count = M_IMGDATA->m_width * M_IMGDATA->m_height;
+ if ( count > 0 && !wxIsNullDouble(angle) )
+ {
+ srcBytePtr = M_IMGDATA->m_data;
+ dstBytePtr = srcBytePtr;
+ do
+ {
+ rgb.red = *srcBytePtr++;
+ rgb.green = *srcBytePtr++;
+ rgb.blue = *srcBytePtr++;
+ hsv = RGBtoHSV(rgb);
+
+ hsv.hue = hsv.hue + angle;
+ if (hsv.hue > 1.0)
+ hsv.hue = hsv.hue - 1.0;
+ else if (hsv.hue < 0.0)
+ hsv.hue = hsv.hue + 1.0;
+
+ rgb = HSVtoRGB(hsv);
+ *dstBytePtr++ = rgb.red;
+ *dstBytePtr++ = rgb.green;
+ *dstBytePtr++ = rgb.blue;
+ } while (--count != 0);
+ }
+}
+
//-----------------------------------------------------------------------------
// wxImageHandler
//-----------------------------------------------------------------------------
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);
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)));
+ int x1a = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x)));
+ int y1a = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y)));
+ int x2a = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
+ int y2a = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y)));
- wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false);
+ // Create rotated image
+ wxImage rotated (x2a - x1a + 1, y2a - y1a + 1, false);
+ // With alpha channel
+ if (has_alpha)
+ rotated.SetAlpha();
if (offset_after_rotation != NULL)
{
- *offset_after_rotation = wxPoint (x1, y1);
+ *offset_after_rotation = wxPoint (x1a, y1a);
}
// GRG: The rotated (destination) image is always accessed
//
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).
//
{
for (x = 0; x < rotated.GetWidth(); x++)
{
- wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
+ wxRealPoint src = rotated_point (x + x1a, y + y1a, 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)
unsigned char *p = data[y1] + (3 * x1);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[y1] + x1);
}
else if (d2 < gs_Epsilon)
{
unsigned char *p = data[y1] + (3 * x2);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[y1] + x2);
}
else if (d3 < gs_Epsilon)
{
unsigned char *p = data[y2] + (3 * x2);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[y2] + x2);
}
else if (d4 < gs_Epsilon)
{
unsigned char *p = data[y2] + (3 * x1);
*(dst++) = *(p++);
*(dst++) = *(p++);
- *(dst++) = *(p++);
+ *(dst++) = *p;
+
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[y2] + x1);
}
else
{
( (w1 * *v1 + w2 * *v2 +
w3 * *v3 + w4 * *v4) /
(w1 + w2 + w3 + w4) );
+
+ if (has_alpha)
+ {
+ v1 = alpha[y1] + (x1);
+ v2 = alpha[y1] + (x2);
+ v3 = alpha[y2] + (x2);
+ v4 = alpha[y2] + (x1);
+
+ *(alpha_dst++) = (unsigned char)
+ ( (w1 * *v1 + w2 * *v2 +
+ w3 * *v3 + w4 * *v4) /
+ (w1 + w2 + w3 + w4) );
+ }
}
}
else
*(dst++) = blank_r;
*(dst++) = blank_g;
*(dst++) = blank_b;
+
+ if (has_alpha)
+ *(alpha_dst++) = 0;
}
}
}
{
for (x = 0; x < rotated.GetWidth(); x++)
{
- wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
+ wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0);
const int xs = wxCint (src.x); // wxCint rounds to the
const int ys = wxCint (src.y); // closest integer
*(dst++) = *(p++);
*(dst++) = *(p++);
*(dst++) = *p;
+
+ if (has_alpha)
+ *(alpha_dst++) = *(alpha[ys] + (xs));
}
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;
}
projects / wxWidgets.git / blobdiff