// For memcpy
#include <string.h>
+#include <math.h>
#ifdef __SALFORDC__
#undef FAR
bool m_hasMask;
unsigned char m_maskRed,m_maskGreen,m_maskBlue;
bool m_ok;
+ bool m_static;
+ wxPalette m_palette;
+ wxArrayString m_optionNames;
+ wxArrayString m_optionValues;
};
wxImageRefData::wxImageRefData()
m_maskGreen = 0;
m_maskBlue = 0;
m_hasMask = FALSE;
+ m_static = FALSE;
}
wxImageRefData::~wxImageRefData()
{
- if (m_data)
+ if (m_data && !m_static)
free( m_data );
}
#define M_IMGDATA ((wxImageRefData *)m_refData)
- IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
+IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
wxImage::wxImage()
{
Create( width, height );
}
+wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
+{
+ Create( width, height, data, static_data );
+}
+
wxImage::wxImage( const wxString& name, long type )
{
LoadFile( name, type );
void wxImage::Create( int width, int height )
{
+ UnRef();
+
m_refData = new wxImageRefData();
M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
}
}
+void wxImage::Create( int width, int height, unsigned char* data, bool static_data )
+{
+ UnRef();
+
+ m_refData = new wxImageRefData();
+
+ M_IMGDATA->m_data = data;
+ if (M_IMGDATA->m_data)
+ {
+ M_IMGDATA->m_width = width;
+ M_IMGDATA->m_height = height;
+ M_IMGDATA->m_ok = TRUE;
+ M_IMGDATA->m_static = static_data;
+ }
+ else
+ {
+ UnRef();
+ }
+}
+
void wxImage::Destroy()
{
UnRef();
}
+wxImage wxImage::Copy() const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
+
+ char unsigned *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 );
+
+ memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
+
+ return image;
+}
+
wxImage wxImage::Scale( int width, int height ) const
{
wxImage image;
return image;
}
+wxImage wxImage::Rotate90( bool clockwise ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width );
+
+ char unsigned *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ if (M_IMGDATA->m_hasMask)
+ image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+
+ long height = M_IMGDATA->m_height;
+ long width = M_IMGDATA->m_width;
+
+ char unsigned *source_data = M_IMGDATA->m_data;
+ char unsigned *target_data;
+
+ for (long j = 0; j < height; j++)
+ {
+ for (long i = 0; i < width; i++)
+ {
+ if (clockwise)
+ target_data = data + (((i+1)*height) - j - 1)*3;
+ else
+ target_data = data + ((height*(width-1)) + j - (i*height))*3;
+ memcpy( target_data, source_data, 3 );
+ source_data += 3;
+ }
+ }
+
+ return image;
+}
+
+wxImage wxImage::Mirror( bool horizontally ) const
+{
+ wxImage image;
+
+ wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+
+ image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height );
+
+ char unsigned *data = image.GetData();
+
+ wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+ if (M_IMGDATA->m_hasMask)
+ image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+
+ long height = M_IMGDATA->m_height;
+ long width = M_IMGDATA->m_width;
+
+ char unsigned *source_data = M_IMGDATA->m_data;
+ char unsigned *target_data;
+
+ if (horizontally)
+ {
+ for (long j = 0; j < height; j++)
+ {
+ data += width*3;
+ target_data = data-3;
+ for (long i = 0; i < width; i++)
+ {
+ memcpy( target_data, source_data, 3 );
+ source_data += 3;
+ target_data -= 3;
+ }
+ }
+ }
+ else
+ {
+ for (long i = 0; i < height; i++)
+ {
+ target_data = data + 3*width*(height-1-i);
+ memcpy( target_data, source_data, (size_t)3*width );
+ source_data += 3*width;
+ }
+ }
+
+ return image;
+}
+
wxImage wxImage::GetSubImage( const wxRect &rect ) const
{
wxImage image;
return image;
}
+void wxImage::Paste( const wxImage &image, int x, int y )
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+ wxCHECK_RET( image.Ok(), wxT("invalid image") );
+
+ int xx = 0;
+ int yy = 0;
+ int width = image.GetWidth();
+ int height = image.GetHeight();
+
+ if (x < 0)
+ {
+ xx = -x;
+ width += x;
+ }
+ if (y < 0)
+ {
+ yy = -y;
+ height += y;
+ }
+
+ if ((x+xx)+width > M_IMGDATA->m_width)
+ width = M_IMGDATA->m_width - (x+xx);
+ if ((y+yy)+height > M_IMGDATA->m_height)
+ height = M_IMGDATA->m_height - (y+yy);
+
+ if (width < 1) return;
+ if (height < 1) return;
+
+ if ((!HasMask() && !image.HasMask()) ||
+ ((HasMask() && image.HasMask() &&
+ (GetMaskRed()==image.GetMaskRed()) &&
+ (GetMaskGreen()==image.GetMaskGreen()) &&
+ (GetMaskBlue()==image.GetMaskBlue()))))
+ {
+ width *= 3;
+ unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
+ int source_step = image.GetWidth()*3;
+
+ unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
+ int target_step = M_IMGDATA->m_width*3;
+ for (int j = 0; j < height; j++)
+ {
+ memcpy( target_data, source_data, width );
+ source_data += source_step;
+ target_data += target_step;
+ }
+ return;
+ }
+
+ if (!HasMask() && image.HasMask())
+ {
+ unsigned char r = image.GetMaskRed();
+ unsigned char g = image.GetMaskGreen();
+ unsigned char b = image.GetMaskBlue();
+
+ width *= 3;
+ unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
+ int source_step = image.GetWidth()*3;
+
+ unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
+ int target_step = M_IMGDATA->m_width*3;
+
+ for (int j = 0; j < height; j++)
+ {
+ for (int i = 0; i < width; i+=3)
+ {
+ if ((source_data[i] != r) &&
+ (source_data[i+1] != g) &&
+ (source_data[i+2] != b))
+ {
+ memcpy( target_data+i, source_data+i, 3 );
+ }
+ }
+ source_data += source_step;
+ target_data += target_step;
+ }
+ }
+}
+
void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1,
unsigned char r2, unsigned char g2, unsigned char b2 )
{
wxCHECK_RET( Ok(), wxT("invalid image") );
char unsigned *data = GetData();
-
+
const int w = GetWidth();
const int h = GetHeight();
M_IMGDATA->m_data[ pos+2 ] = b;
}
-unsigned char wxImage::GetRed( int x, int y )
+unsigned char wxImage::GetRed( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
return M_IMGDATA->m_data[pos];
}
-unsigned char wxImage::GetGreen( int x, int y )
+unsigned char wxImage::GetGreen( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
return M_IMGDATA->m_data[pos+1];
}
-unsigned char wxImage::GetBlue( int x, int y )
+unsigned char wxImage::GetBlue( int x, int y ) const
{
wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
m_refData = newRefData;
}
+void wxImage::SetData( char unsigned *data, int new_width, int new_height )
+{
+ wxImageRefData *newRefData = new wxImageRefData();
+
+ if (m_refData)
+ {
+ newRefData->m_width = new_width;
+ newRefData->m_height = new_height;
+ newRefData->m_data = data;
+ newRefData->m_ok = TRUE;
+ newRefData->m_maskRed = M_IMGDATA->m_maskRed;
+ newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
+ newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
+ newRefData->m_hasMask = M_IMGDATA->m_hasMask;
+ }
+ else
+ {
+ newRefData->m_width = new_width;
+ newRefData->m_height = new_height;
+ newRefData->m_data = data;
+ newRefData->m_ok = TRUE;
+ }
+
+ UnRef();
+
+ m_refData = newRefData;
+}
+
void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
{
wxCHECK_RET( Ok(), wxT("invalid image") );
return M_IMGDATA->m_height;
}
+// Palette functions
+
+bool wxImage::HasPalette() const
+{
+ if (!Ok())
+ return FALSE;
+
+ return M_IMGDATA->m_palette.Ok();
+}
+
+const wxPalette& wxImage::GetPalette() const
+{
+ wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") );
+
+ return M_IMGDATA->m_palette;
+}
+
+void wxImage::SetPalette(const wxPalette& palette)
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ M_IMGDATA->m_palette = palette;
+}
+
+// Option functions (arbitrary name/value mapping)
+void wxImage::SetOption(const wxString& name, const wxString& value)
+{
+ wxCHECK_RET( Ok(), wxT("invalid image") );
+
+ int idx = M_IMGDATA->m_optionNames.Index(name, FALSE);
+ if (idx == wxNOT_FOUND)
+ {
+ M_IMGDATA->m_optionNames.Add(name);
+ M_IMGDATA->m_optionValues.Add(value);
+ }
+ else
+ {
+ M_IMGDATA->m_optionNames[idx] = name;
+ M_IMGDATA->m_optionValues[idx] = value;
+ }
+}
+
+void wxImage::SetOption(const wxString& name, int value)
+{
+ wxString valStr;
+ valStr.Printf(wxT("%d"), value);
+ SetOption(name, valStr);
+}
+
+wxString wxImage::GetOption(const wxString& name) const
+{
+ wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") );
+
+ int idx = M_IMGDATA->m_optionNames.Index(name, FALSE);
+ if (idx == wxNOT_FOUND)
+ return wxEmptyString;
+ else
+ return M_IMGDATA->m_optionValues[idx];
+}
+
+int wxImage::GetOptionInt(const wxString& name) const
+{
+ wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+ return wxAtoi(GetOption(name));
+}
+
+bool wxImage::HasOption(const wxString& name) const
+{
+ wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
+
+ return (M_IMGDATA->m_optionNames.Index(name, FALSE) != wxNOT_FOUND);
+}
+
bool wxImage::LoadFile( const wxString& filename, long type )
{
#if wxUSE_STREAMS
wxBufferedOutputStream bstream( stream );
return SaveFile(bstream, type);
}
- else
#endif // wxUSE_STREAMS
- return FALSE;
+
+ return FALSE;
}
bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype )
wxBufferedOutputStream bstream( stream );
return SaveFile(bstream, mimetype);
}
- else
#endif // wxUSE_STREAMS
- return FALSE;
+
+ return FALSE;
}
bool wxImage::CanRead( const wxString &name )
hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
::SelectObject( memdc, hbitmap);
+ HPALETTE hOldPalette = 0;
+ if (GetPalette().Ok())
+ {
+ hOldPalette = ::SelectPalette(memdc, (HPALETTE) GetPalette().GetHPALETTE(), FALSE);
+ ::RealizePalette(memdc);
+ }
+
// copy image data into DIB data and then into DDB (in a loop)
unsigned char *data = GetData();
int i, j, n;
}
bitmap.SetHBITMAP( (WXHBITMAP) hbitmap );
+ if (hOldPalette)
+ SelectPalette(memdc, hOldPalette, FALSE);
+
// similarly, created an mono-bitmap for the possible mask
if( HasMask() )
{
for(i=0; i<width; i++ )
{
// was causing a code gen bug in cw : if( ( cr !=r) || (cg!=g) || (cb!=b) )
- unsigned char cr = (*(ptdata++)) ;
- unsigned char cg = (*(ptdata++)) ;
- unsigned char cb = (*(ptdata++)) ;
-
+ unsigned char cr = (*(ptdata++)) ;
+ unsigned char cg = (*(ptdata++)) ;
+ unsigned char cb = (*(ptdata++)) ;
+
if( ( cr !=r) || (cg!=g) || (cb!=b) )
{
*(ptbits++) = one;
int g_mask = GetMaskGreen();
int b_mask = GetMaskBlue();
- CGrafPtr origPort ;
- GDHandle origDevice ;
-
- GetGWorld( &origPort , &origDevice ) ;
- SetGWorld( bitmap.GetHBITMAP() , NULL ) ;
+ CGrafPtr origPort ;
+ GDHandle origDevice ;
+
+ GetGWorld( &origPort , &origDevice ) ;
+ SetGWorld( bitmap.GetHBITMAP() , NULL ) ;
register unsigned char* data = GetData();
{
for (int x = 0; x < width; x++)
{
- unsigned char r = data[index++];
- unsigned char g = data[index++];
- unsigned char b = data[index++];
- RGBColor color ;
- color.red = ( r << 8 ) + r ;
- color.green = ( g << 8 ) + g ;
- color.blue = ( b << 8 ) + b ;
- SetCPixel( x , y , &color ) ;
- }
+ unsigned char r = data[index++];
+ unsigned char g = data[index++];
+ unsigned char b = data[index++];
+ RGBColor color ;
+ color.red = ( r << 8 ) + r ;
+ color.green = ( g << 8 ) + g ;
+ color.blue = ( b << 8 ) + b ;
+ SetCPixel( x , y , &color ) ;
+ }
} // for height
SetGWorld( origPort , origDevice ) ;
ptbits += 3;
}
ptbits += padding;
- }
+ }
// similarly, set data according to the possible mask bitmap
if( bitmap.GetMask() && bitmap.GetMask()->GetMaskBitmap() )
bitmap.SetWidth( width );
bitmap.SetBitmap( gdk_pixmap_new( wxRootWindow->window, width, height, 1 ) );
-
+
bitmap.SetDepth( 1 );
GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
wxASSERT( visual );
-
+
// Create picture image
unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
-
+
GdkImage *data_image =
gdk_image_new_bitmap( visual, data_data, width, height );
else
gdk_image_put_pixel( mask_image, x, y, 0 );
}
-
+
if ((r == red) && (b == blue) && (g == green))
gdk_image_put_pixel( data_image, x, y, 1 );
- else
+ else
gdk_image_put_pixel( data_image, x, y, 0 );
} // for
GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
wxASSERT( visual );
-
+
int bpp = visual->depth;
bitmap.SetDepth( bpp );
int green_shift_left = 0;
int blue_shift_left = 0;
bool use_shift = FALSE;
-
+
if (bitmap.GetPixmap())
{
GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
green_shift_left = 8-visual->green_prec;
blue_shift_right = visual->blue_shift;
blue_shift_left = 8-visual->blue_prec;
-
+
use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
}
if (bitmap.GetBitmap())
bpp = 1;
}
-
+
GdkColormap *cmap = gtk_widget_get_default_colormap();
long pos = 0;
data[pos] = (pixel >> red_shift_right) << red_shift_left;
data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
data[pos+2] = (pixel >> blue_shift_right) << blue_shift_left;
- }
+ }
else if (cmap->colors)
{
data[pos] = cmap->colors[pixel].red >> 8;
data[pos+1] = cmap->colors[pixel].green >> 8;
data[pos+2] = cmap->colors[pixel].blue >> 8;
- }
+ }
else
{
wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
- }
+ }
if (gdk_image_mask)
{
bitmap.Create( width, height, bpp );
- /*
// Create mask
- GdkImage *mask_image = (GdkImage*) NULL;
-
- if (HasMask())
- {
- unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
-
- mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height );
-
- wxMask *mask = new wxMask();
- mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 );
-
- bitmap.SetMask( mask );
- }
- */
+ XImage *mask_image = (XImage*) NULL;
+ if (HasMask())
+ {
+ mask_image = XCreateImage( dpy, vis, 1, ZPixmap, 0, 0, width, height, 32, 0 );
+ mask_image->data = (char*) malloc( mask_image->bytes_per_line * mask_image->height );
+ }
// Retrieve depth info
else if ((vi->green_mask > vi->blue_mask) && (vi->blue_mask > vi->red_mask)) b_o = GBR;
}
- /*
int r_mask = GetMaskRed();
int g_mask = GetMaskGreen();
int b_mask = GetMaskBlue();
- */
XColor colors[256];
if (bpp == 8)
wxSearchColor scolor( 256, colors );
unsigned char* data = GetData();
+ bool hasMask = HasMask();
+
int index = 0;
for (int y = 0; y < height; y++)
{
int b = data[index];
index++;
- /*
- if (HasMask())
+ if (hasMask)
{
- if ((r == r_mask) && (b == b_mask) && (g == g_mask))
- gdk_image_put_pixel( mask_image, x, y, 1 );
- else
- gdk_image_put_pixel( mask_image, x, y, 0 );
+ if ((r == r_mask) && (b == b_mask) && (g == g_mask))
+ XPutPixel( mask_image, x, y, 0 );
+ else
+ XPutPixel( mask_image, x, y, 1 );
}
- */
switch (bpp)
{
XDestroyImage( data_image );
XFreeGC( dpy, gc );
- /*
// Blit mask
+ if (HasMask())
+ {
+ wxBitmap maskBitmap(width, height, 1);
- if (HasMask())
- {
- GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() );
+ GC gcMask = XCreateGC( dpy, (Pixmap) maskBitmap.GetPixmap(), (XtGCMask) 0, (XGCValues*)NULL );
+ XPutImage( dpy, (Drawable)maskBitmap.GetPixmap(), gcMask, mask_image, 0, 0, 0, 0, width, height );
- gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
+ XDestroyImage( mask_image );
+ XFreeGC( dpy, gcMask );
- gdk_image_destroy( mask_image );
- gdk_gc_unref( mask_gc );
- }
- */
+ wxMask* mask = new wxMask;
+ mask->SetPixmap(maskBitmap.GetPixmap());
+
+ bitmap.SetMask(mask);
+
+ maskBitmap.SetPixmapNull();
+ }
return bitmap;
}
unsigned long wxImage::CountColours( unsigned long stopafter )
{
wxHashTable h;
- wxNode *node;
- wxHNode *hnode;
+ wxObject dummy;
unsigned char r, g, b, *p;
unsigned long size, nentries, key;
b = *(p++);
key = (r << 16) | (g << 8) | b;
- hnode = (wxHNode *) h.Get(key);
-
- if (!hnode)
+ if (h.Get(key) == NULL)
{
- h.Put(key, (wxObject *)(new wxHNode));
+ h.Put(key, &dummy);
nentries++;
}
}
- // delete all HNodes
- h.BeginFind();
- while ((node = h.Next()) != NULL)
- delete (wxHNode *)node->GetData();
-
return nentries;
}
return nentries;
}
+/*
+ * Rotation code by Carlos Moreno
+ */
+
+// GRG: I've removed wxRotationPoint - we already have wxRealPoint which
+// does exactly the same thing. And I also got rid of wxRotationPixel
+// bacause of potential problems in architectures where alignment
+// is an issue, so I had to rewrite parts of the code.
+
+static const double gs_Epsilon = 1e-10;
+
+static inline int wxCint (double x)
+{
+ return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5);
+}
+
+
+// Auxiliary function to rotate a point (x,y) with respect to point p0
+// make it inline and use a straight return to facilitate optimization
+// also, the function receives the sine and cosine of the angle to avoid
+// repeating the time-consuming calls to these functions -- sin/cos can
+// be computed and stored in the calling function.
+
+inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0)
+{
+ return wxRealPoint (p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle,
+ p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle);
+}
+
+inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0)
+{
+ return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0);
+}
+
+wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const
+{
+ int i;
+ angle = -angle; // screen coordinates are a mirror image of "real" coordinates
+
+ // Create pointer-based array to accelerate access to wxImage's data
+ unsigned char ** data = new unsigned char * [GetHeight()];
+
+ data[0] = GetData();
+
+ for (i = 1; i < GetHeight(); i++)
+ data[i] = data[i - 1] + (3 * GetWidth());
+
+ // precompute coefficients for rotation formula
+ // (sine and cosine of the angle)
+ const double cos_angle = cos(angle);
+ const double sin_angle = sin(angle);
+
+ // Create new Image to store the result
+ // First, find rectangle that covers the rotated image; to do that,
+ // rotate the four corners
+
+ const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y);
+
+ wxRealPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0);
+ wxRealPoint p2 = rotated_point (0, GetHeight(), cos_angle, sin_angle, p0);
+ wxRealPoint p3 = rotated_point (GetWidth(), 0, cos_angle, sin_angle, p0);
+ wxRealPoint p4 = rotated_point (GetWidth(), GetHeight(), cos_angle, sin_angle, p0);
+
+ int x1 = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x)));
+ int y1 = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y)));
+ int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
+ int y2 = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y)));
+
+ wxImage rotated (x2 - x1 + 1, y2 - y1 + 1);
+
+ if (offset_after_rotation != NULL)
+ {
+ *offset_after_rotation = wxPoint (x1, y1);
+ }
+
+ // GRG: The rotated (destination) image is always accessed
+ // sequentially, so there is no need for a pointer-based
+ // array here (and in fact it would be slower).
+ //
+ unsigned char * dst = rotated.GetData();
+
+ // GRG: if the original image has a mask, use its RGB values
+ // as the blank pixel, else, fall back to default (black).
+ //
+ unsigned char blank_r = 0;
+ unsigned char blank_g = 0;
+ unsigned char blank_b = 0;
+
+ if (HasMask())
+ {
+ blank_r = GetMaskRed();
+ blank_g = GetMaskGreen();
+ blank_b = GetMaskBlue();
+ rotated.SetMaskColour( blank_r, blank_g, blank_b );
+ }
+
+ // Now, for each point of the rotated image, find where it came from, by
+ // performing an inverse rotation (a rotation of -angle) and getting the
+ // pixel at those coordinates
+
+ // GRG: I've taken the (interpolating) test out of the loops, so that
+ // it is done only once, instead of repeating it for each pixel.
+
+ int x;
+ if (interpolating)
+ {
+ for (int y = 0; y < rotated.GetHeight(); y++)
+ {
+ for (x = 0; x < rotated.GetWidth(); x++)
+ {
+ wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
+
+ if (-0.25 < src.x && src.x < GetWidth() - 0.75 &&
+ -0.25 < src.y && src.y < GetHeight() - 0.75)
+ {
+ // interpolate using the 4 enclosing grid-points. Those
+ // points can be obtained using floor and ceiling of the
+ // exact coordinates of the point
+ // C.M. 2000-02-17: when the point is near the border, special care is required.
+
+ int x1, y1, x2, y2;
+
+ if (0 < src.x && src.x < GetWidth() - 1)
+ {
+ x1 = wxCint(floor(src.x));
+ x2 = wxCint(ceil(src.x));
+ }
+ else // else means that x is near one of the borders (0 or width-1)
+ {
+ x1 = x2 = wxCint (src.x);
+ }
+
+ if (0 < src.y && src.y < GetHeight() - 1)
+ {
+ y1 = wxCint(floor(src.y));
+ y2 = wxCint(ceil(src.y));
+ }
+ else
+ {
+ y1 = y2 = wxCint (src.y);
+ }
+
+ // get four points and the distances (square of the distance,
+ // for efficiency reasons) for the interpolation formula
+
+ // GRG: Do not calculate the points until they are
+ // really needed -- this way we can calculate
+ // just one, instead of four, if d1, d2, d3
+ // or d4 are < gs_Epsilon
+
+ const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1);
+ const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1);
+ const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2);
+ const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2);
+
+ // Now interpolate as a weighted average of the four surrounding
+ // points, where the weights are the distances to each of those points
+
+ // If the point is exactly at one point of the grid of the source
+ // image, then don't interpolate -- just assign the pixel
+
+ if (d1 < gs_Epsilon) // d1,d2,d3,d4 are positive -- no need for abs()
+ {
+ unsigned char *p = data[y1] + (3 * x1);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
+ else if (d2 < gs_Epsilon)
+ {
+ unsigned char *p = data[y1] + (3 * x2);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
+ else if (d3 < gs_Epsilon)
+ {
+ unsigned char *p = data[y2] + (3 * x2);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
+ else if (d4 < gs_Epsilon)
+ {
+ unsigned char *p = data[y2] + (3 * x1);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
+ else
+ {
+ // weights for the weighted average are proportional to the inverse of the distance
+ unsigned char *v1 = data[y1] + (3 * x1);
+ unsigned char *v2 = data[y1] + (3 * x2);
+ unsigned char *v3 = data[y2] + (3 * x2);
+ unsigned char *v4 = data[y2] + (3 * x1);
+
+ const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4;
+
+ // GRG: Unrolled.
+
+ *(dst++) = (unsigned char)
+ ( (w1 * *(v1++) + w2 * *(v2++) +
+ w3 * *(v3++) + w4 * *(v4++)) /
+ (w1 + w2 + w3 + w4) );
+ *(dst++) = (unsigned char)
+ ( (w1 * *(v1++) + w2 * *(v2++) +
+ w3 * *(v3++) + w4 * *(v4++)) /
+ (w1 + w2 + w3 + w4) );
+ *(dst++) = (unsigned char)
+ ( (w1 * *(v1++) + w2 * *(v2++) +
+ w3 * *(v3++) + w4 * *(v4++)) /
+ (w1 + w2 + w3 + w4) );
+ }
+ }
+ else
+ {
+ *(dst++) = blank_r;
+ *(dst++) = blank_g;
+ *(dst++) = blank_b;
+ }
+ }
+ }
+ }
+ else // not interpolating
+ {
+ for (int y = 0; y < rotated.GetHeight(); y++)
+ {
+ for (x = 0; x < rotated.GetWidth(); x++)
+ {
+ wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
+
+ const int xs = wxCint (src.x); // wxCint rounds to the
+ const int ys = wxCint (src.y); // closest integer
+
+ if (0 <= xs && xs < GetWidth() &&
+ 0 <= ys && ys < GetHeight())
+ {
+ unsigned char *p = data[ys] + (3 * xs);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ *(dst++) = *(p++);
+ }
+ else
+ {
+ *(dst++) = blank_r;
+ *(dst++) = blank_g;
+ *(dst++) = blank_b;
+ }
+ }
+ }
+ }
+
+ delete [] data;
+
+ return rotated;
+}
projects / wxWidgets.git / blobdiff