/////////////////////////////////////////////////////////////////////////////
-// 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"
#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"
+
+#ifndef WX_PRECOMP
+ #include "wx/log.h"
+ #include "wx/app.h"
+ #include "wx/hash.h"
+ #include "wx/utils.h"
+ #include "wx/bitmap.h"
+ #include "wx/math.h"
+#endif
+
#include "wx/filefn.h"
#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"
+ #include "wx/xpmdecod.h"
#endif
// For memcpy
#include <string.h>
-#ifdef __SALFORDC__
- #undef FAR
-#endif
-
-
//-----------------------------------------------------------------------------
// wxImage
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
-#define M_IMGDATA ((wxImageRefData *)m_refData)
+#define M_IMGDATA wx_static_cast(wxImageRefData*, m_refData)
IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
}
#endif // wxUSE_STREAMS
-wxImage::wxImage( const wxImage& image )
- : wxObject()
-{
- Ref(image);
-}
-
-wxImage::wxImage( const wxImage* image )
-{
- if (image) Ref(*image);
-}
-
wxImage::wxImage( const char** xpmData )
{
Create(xpmData);
UnRef();
}
-wxImage wxImage::Copy() const
+wxObjectRefData* wxImage::CreateRefData() const
{
- wxImage image;
-
- wxCHECK_MSG( Ok(), image, wxT("invalid image") );
-
- image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
+ return new wxImageRefData;
+}
- unsigned char *data = image.GetData();
+wxObjectRefData* wxImage::CloneRefData(const wxObjectRefData* that) const
+{
+ const wxImageRefData* refData = wx_static_cast(const wxImageRefData*, that);
+ wxCHECK_MSG(refData->m_ok, NULL, wxT("invalid image") );
- wxCHECK_MSG( data, image, wxT("unable to create image") );
+ wxImageRefData* refData_new = new wxImageRefData;
+ refData_new->m_width = refData->m_width;
+ refData_new->m_height = refData->m_height;
+ refData_new->m_maskRed = refData->m_maskRed;
+ refData_new->m_maskGreen = refData->m_maskGreen;
+ refData_new->m_maskBlue = refData->m_maskBlue;
+ refData_new->m_hasMask = refData->m_hasMask;
+ refData_new->m_ok = true;
+ unsigned size = unsigned(refData->m_width) * unsigned(refData->m_height);
+ if (refData->m_alpha != NULL)
+ {
+ refData_new->m_alpha = (unsigned char*)malloc(size);
+ memcpy(refData_new->m_alpha, refData->m_alpha, size);
+ }
+ size *= 3;
+ refData_new->m_data = (unsigned char*)malloc(size);
+ memcpy(refData_new->m_data, refData->m_data, size);
+#if wxUSE_PALETTE
+ refData_new->m_palette = refData->m_palette;
+#endif
+ refData_new->m_optionNames = refData->m_optionNames;
+ refData_new->m_optionValues = refData->m_optionValues;
+ return refData_new;
+}
- image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
- image.SetMask( M_IMGDATA->m_hasMask );
+wxImage wxImage::Copy() const
+{
+ wxImage image;
- memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- // 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;
+ image.m_refData = CloneRefData(m_refData);
return image;
}
wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
{
if( xFactor == 1 && yFactor == 1 )
- return Copy() ;
+ return *this;
wxImage image;
}
}
- // In case this is a cursor, make sure the hotspot is scalled accordingly:
+ // In case this is a cursor, make sure the hotspot is scaled accordingly:
if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
(GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X))/xFactor);
y += y_delta;
}
- // In case this is a cursor, make sure the hotspot is scalled accordingly:
+ // In case this is a cursor, make sure the hotspot is scaled accordingly:
if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
(GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)*width)/old_width);
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;
+ }
}
}
image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
unsigned char *data = image.GetData();
+ unsigned char *alpha = NULL;
wxCHECK_MSG( data, image, wxT("unable to create image") );
+ if (M_IMGDATA->m_alpha != NULL) {
+ image.SetAlpha();
+ alpha = image.GetAlpha();
+ wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") );
+ }
+
if (M_IMGDATA->m_hasMask)
image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
target_data -= 3;
}
}
+
+ if (alpha != NULL)
+ {
+ // src_alpha starts at the first pixel and increases by 1 after each step
+ // (a step here is the copy of the alpha value of one pixel)
+ const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+ // dest_alpha starts just beyond the first line, decreases before each step,
+ // and after each line is finished, increases by 2 widths (skipping the line
+ // just copied and the line that will be copied next)
+ unsigned char *dest_alpha = alpha + width;
+
+ for (long jj = 0; jj < height; ++jj)
+ {
+ for (long i = 0; i < width; ++i) {
+ *(--dest_alpha) = *(src_alpha++); // copy one pixel
+ }
+ dest_alpha += 2 * width; // advance beyond the end of the next line
+ }
+ }
}
else
{
memcpy( target_data, source_data, (size_t)3*width );
source_data += 3*width;
}
+
+ if (alpha != NULL)
+ {
+ // src_alpha starts at the first pixel and increases by 1 width after each step
+ // (a step here is the copy of the alpha channel of an entire line)
+ const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+ // dest_alpha starts just beyond the last line (beyond the whole image)
+ // and decreases by 1 width before each step
+ unsigned char *dest_alpha = alpha + width * height;
+
+ for (long jj = 0; jj < height; ++jj)
+ {
+ dest_alpha -= width;
+ memcpy( dest_alpha, src_alpha, (size_t)width );
+ src_alpha += width;
+ }
+ }
}
return image;
wxCHECK_MSG( Ok(), image, wxT("invalid image") );
- wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()),
+ 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();
+ const int subwidth = rect.GetWidth();
+ const int subheight = rect.GetHeight();
image.Create( subwidth, subheight, false );
- unsigned char *subdata = image.GetData(), *data=GetData();
+ const unsigned char *src_data = GetData();
+ const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+ unsigned char *subdata = image.GetData();
+ unsigned char *subalpha = NULL;
wxCHECK_MSG( subdata, image, wxT("unable to create image") );
+ if (src_alpha != NULL) {
+ image.SetAlpha();
+ subalpha = image.GetAlpha();
+ wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel"));
+ }
+
if (M_IMGDATA->m_hasMask)
image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
- const int subleft=3*rect.GetLeft();
- const int width=3*GetWidth();
- subwidth*=3;
+ const int width = GetWidth();
+ const int pixsoff = rect.GetLeft() + width * rect.GetTop();
- data+=rect.GetTop()*width+subleft;
+ src_data += 3 * pixsoff;
+ src_alpha += pixsoff; // won't be used if was NULL, so this is ok
for (long j = 0; j < subheight; ++j)
{
- memcpy( subdata, data, subwidth);
- subdata+=subwidth;
- data+=width;
+ memcpy( subdata, src_data, 3 * subwidth );
+ subdata += 3 * subwidth;
+ src_data += 3 * width;
+ if (subalpha != NULL) {
+ memcpy( subalpha, src_alpha, subwidth );
+ subalpha += subwidth;
+ src_alpha += width;
+ }
}
return image;
wxRect subRect(pos.x, pos.y, width, height);
wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight());
+ if (pos.x < 0)
+ finalRect.width -= pos.x;
+ if (pos.y < 0)
+ finalRect.height -= pos.y;
subRect.Intersect(finalRect);
wxCHECK_RET( Ok(), wxT("invalid image") );
wxCHECK_RET( image.Ok(), wxT("invalid image") );
+ AllocExclusive();
+
int xx = 0;
int yy = 0;
int width = image.GetWidth();
{
wxCHECK_RET( Ok(), wxT("invalid image") );
+ AllocExclusive();
+
unsigned char *data = GetData();
const int w = GetWidth();
}
}
+wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false);
+
+ unsigned char *dest = image.GetData();
+
+ wxCHECK_MSG( dest, image, wxT("unable to create image") );
+
+ unsigned char *src = M_IMGDATA->m_data;
+ bool hasMask = M_IMGDATA->m_hasMask;
+ unsigned char maskRed = M_IMGDATA->m_maskRed;
+ unsigned char maskGreen = M_IMGDATA->m_maskGreen;
+ unsigned char maskBlue = M_IMGDATA->m_maskBlue;
+
+ if ( hasMask )
+ image.SetMaskColour(maskRed, maskGreen, maskBlue);
+
+ const long size = M_IMGDATA->m_width * M_IMGDATA->m_height;
+ for ( long i = 0; i < size; i++, src += 3, dest += 3 )
+ {
+ // don't modify the mask
+ if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue )
+ {
+ memcpy(dest, src, 3);
+ }
+ else
+ {
+ // calculate the luma
+ double luma = (src[0] * lr + src[1] * lg + src[2] * lb) + 0.5;
+ dest[0] = dest[1] = dest[2] = wx_static_cast(unsigned char, luma);
+ }
+ }
+
+ // copy the alpha channel, if any
+ if (HasAlpha())
+ {
+ const size_t alphaSize = GetWidth() * GetHeight();
+ unsigned char *alpha = (unsigned char*)malloc(alphaSize);
+ memcpy(alpha, GetAlpha(), alphaSize);
+ image.InitAlpha();
+ image.SetAlpha(alpha);
+ }
+
+ return image;
+}
+
wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const
{
wxImage image;
return image;
}
+int wxImage::GetWidth() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ return M_IMGDATA->m_width;
+}
+
+int wxImage::GetHeight() const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ return M_IMGDATA->m_height;
+}
+
long wxImage::XYToIndex(int x, int y) const
{
if ( Ok() &&
long pos = XYToIndex(x, y);
wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
+ AllocExclusive();
+
pos *= 3;
M_IMGDATA->m_data[ pos ] = r;
{
wxCHECK_RET( Ok(), wxT("invalid image") );
+ AllocExclusive();
+
wxRect rect(rect_);
wxRect imageRect(0, 0, GetWidth(), GetHeight());
if ( rect == wxRect() )
long pos = XYToIndex(x, y);
wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
+ AllocExclusive();
+
M_IMGDATA->m_alpha[pos] = alpha;
}
{
wxCHECK_RET( Ok(), wxT("invalid image") );
+ AllocExclusive();
+
if ( !alpha )
{
alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height);
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.
src += 3, alpha++ )
{
*alpha = (src[0] == mr && src[1] == mg && src[2] == mb)
- ? ALPHA_TRANSPARENT
- : ALPHA_OPAQUE;
+ ? wxIMAGE_ALPHA_TRANSPARENT
+ : wxIMAGE_ALPHA_OPAQUE;
}
M_IMGDATA->m_hasMask = false;
else // no mask
{
// make the image fully opaque
- memset(alpha, ALPHA_OPAQUE, lenAlpha);
+ memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha);
}
}
{
wxCHECK_RET( Ok(), wxT("invalid image") );
+ AllocExclusive();
+
M_IMGDATA->m_maskRed = r;
M_IMGDATA->m_maskGreen = g;
M_IMGDATA->m_maskBlue = b;
{
wxCHECK_RET( Ok(), wxT("invalid image") );
+ AllocExclusive();
+
M_IMGDATA->m_hasMask = mask;
}
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 false ;
}
+ AllocExclusive();
+
unsigned char *imgdata = GetData();
unsigned char *maskdata = mask.GetData();
return false;
}
+ AllocExclusive();
+
SetMask(true);
SetMaskColour(mr, mg, mb);
return true;
}
-#if wxUSE_PALETTE
-
+// ----------------------------------------------------------------------------
// Palette functions
+// ----------------------------------------------------------------------------
+
+#if wxUSE_PALETTE
bool wxImage::HasPalette() const
{
{
wxCHECK_RET( Ok(), wxT("invalid image") );
+ AllocExclusive();
+
M_IMGDATA->m_palette = palette;
}
#endif // wxUSE_PALETTE
+// ----------------------------------------------------------------------------
// Option functions (arbitrary name/value mapping)
+// ----------------------------------------------------------------------------
+
void wxImage::SetOption(const wxString& name, const wxString& value)
{
wxCHECK_RET( Ok(), wxT("invalid image") );
+ AllocExclusive();
+
int idx = M_IMGDATA->m_optionNames.Index(name, false);
if (idx == wxNOT_FOUND)
{
return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND);
}
-bool wxImage::LoadFile( const wxString& filename, long type, int index )
+// ----------------------------------------------------------------------------
+// image I/O
+// ----------------------------------------------------------------------------
+
+bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+ long WXUNUSED_UNLESS_STREAMS(type),
+ int WXUNUSED_UNLESS_STREAMS(index) )
{
#if wxUSE_STREAMS
if (wxFileExists(filename))
#endif // wxUSE_STREAMS
}
-bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int index )
+bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+ const wxString& WXUNUSED_UNLESS_STREAMS(mimetype),
+ int WXUNUSED_UNLESS_STREAMS(index) )
{
#if wxUSE_STREAMS
if (wxFileExists(filename))
return false;
}
-bool wxImage::SaveFile( const wxString& filename, int type ) const
+bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+ int WXUNUSED_UNLESS_STREAMS(type) ) const
{
#if wxUSE_STREAMS
wxCHECK_MSG( Ok(), false, wxT("invalid image") );
return false;
}
-bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) const
+bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+ const wxString& WXUNUSED_UNLESS_STREAMS(mimetype) ) const
{
#if wxUSE_STREAMS
wxCHECK_MSG( Ok(), false, wxT("invalid image") );
return false;
}
-bool wxImage::CanRead( const wxString &name )
+bool wxImage::CanRead( const wxString& WXUNUSED_UNLESS_STREAMS(name) )
{
#if wxUSE_STREAMS
- wxFileInputStream stream(name);
- return CanRead(stream);
+ wxFileInputStream stream(name);
+ return CanRead(stream);
#else
- return false;
+ return false;
#endif
}
-int wxImage::GetImageCount( const wxString &name, long type )
+int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name),
+ long WXUNUSED_UNLESS_STREAMS(type) )
{
#if wxUSE_STREAMS
- wxFileInputStream stream(name);
- if (stream.Ok())
- return GetImageCount(stream, type);
+ wxFileInputStream stream(name);
+ if (stream.Ok())
+ return GetImageCount(stream, type);
#endif
return 0;
return false;
}
- return handler->LoadFile(this, stream, true/*verbose*/, index);
+ if (stream.IsSeekable() && !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 (stream.IsSeekable() && !handler->CanRead(stream))
+ {
+ wxLogError(_("Image file is not of type %s."), (const wxChar*) mimetype);
+ return false;
+ }
+ else
+ return handler->LoadFile( this, stream, true/*verbose*/, index );
}
bool wxImage::SaveFile( wxOutputStream& stream, int type ) const
}
#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)
+{
+ AllocExclusive();
+
+ 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
//-----------------------------------------------------------------------------
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)));
// Create rotated image
- wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false);
+ 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
{
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)
*(dst++) = *p;
if (has_alpha)
- {
- unsigned char *p = alpha[y1] + x1;
- *(alpha_dst++) = *p;
- }
+ *(alpha_dst++) = *(alpha[y1] + x1);
}
else if (d2 < gs_Epsilon)
{
*(dst++) = *p;
if (has_alpha)
- {
- unsigned char *p = alpha[y1] + x2;
- *(alpha_dst++) = *p;
- }
+ *(alpha_dst++) = *(alpha[y1] + x2);
}
else if (d3 < gs_Epsilon)
{
*(dst++) = *p;
if (has_alpha)
- {
- unsigned char *p = alpha[y2] + x2;
- *(alpha_dst++) = *p;
- }
+ *(alpha_dst++) = *(alpha[y2] + x2);
}
else if (d4 < gs_Epsilon)
{
*(dst++) = *p;
if (has_alpha)
- {
- unsigned char *p = alpha[y2] + x1;
- *(alpha_dst++) = *p;
- }
+ *(alpha_dst++) = *(alpha[y2] + x1);
}
else
{
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);
+ v1 = alpha[y1] + (x1);
+ v2 = alpha[y1] + (x2);
+ v3 = alpha[y2] + (x2);
+ v4 = alpha[y2] + (x1);
*(alpha_dst++) = (unsigned char)
( (w1 * *v1 + w2 * *v2 +
{
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;
if (has_alpha)
- {
- unsigned char *p = alpha[ys] + (xs);
- *(alpha_dst++) = *p;
- }
+ *(alpha_dst++) = *(alpha[ys] + (xs));
}
else
{
projects / wxWidgets.git / blobdiff