- wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
-
- if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
- return *this;
-
- int width = wxMax(newx, 1);
- int height = wxMax(newy, 1);
- width = wxMin(width, clipwidth);
- height = wxMin(height, clipheight);
-
- wxBitmap bmp;
-
-#ifdef __WXGTK20__
- if (HasPixbuf())
- {
- bmp.SetWidth(width);
- bmp.SetHeight(height);
- bmp.SetDepth(GetDepth());
- bmp.SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB,
- gdk_pixbuf_get_has_alpha(GetPixbuf()),
- 8, width, height));
- gdk_pixbuf_scale(GetPixbuf(), bmp.GetPixbuf(),
- 0, 0, width, height,
- clipx, clipy,
- (double)newx/GetWidth(), (double)newy/GetHeight(),
- GDK_INTERP_BILINEAR);
- }
- else
-#endif // __WXGTK20__
- {
- GdkImage *img = (GdkImage*) NULL;
- if (GetPixmap())
- img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
- else if (GetBitmap())
- img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
- else
- wxFAIL_MSG( wxT("Ill-formed bitmap") );
-
- wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
-
- int bpp = -1;
-
-
- GdkGC *gc = NULL;
- GdkPixmap *dstpix = NULL;
- if (GetPixmap())
- {
- GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
- if (visual == NULL)
- visual = wxTheApp->GetGdkVisual();
-
- bpp = visual->depth;
- bmp = wxBitmap(width,height,bpp);
- dstpix = bmp.GetPixmap();
- gc = gdk_gc_new( dstpix );
- }
-
- char *dst = NULL;
- long dstbyteperline = 0;
-
- if (GetBitmap())
- {
- bpp = 1;
- dstbyteperline = width/8*M_BMPDATA->m_bpp;
- if (width*M_BMPDATA->m_bpp % 8 != 0)
- dstbyteperline++;
- dst = (char*) malloc(dstbyteperline*height);
- }
-
- // be careful to use the right scaling factor
- float scx = (float)M_BMPDATA->m_width/(float)newx;
- float scy = (float)M_BMPDATA->m_height/(float)newy;
- // prepare accel-tables
- int *tablex = (int *)calloc(width,sizeof(int));
- int *tabley = (int *)calloc(height,sizeof(int));
-
- // accel table filled with clipped values
- for (int x = 0; x < width; x++)
- tablex[x] = (int) (scx * (x+clipx));
- for (int y = 0; y < height; y++)
- tabley[y] = (int) (scy * (y+clipy));
-
- // Main rescaling routine starts here
- for (int h = 0; h < height; h++)
- {
- char outbyte = 0;
- int old_x = -1;
- guint32 old_pixval = 0;
-
- for (int w = 0; w < width; w++)
- {
- guint32 pixval;
- int x = tablex[w];
- if (x == old_x)
- pixval = old_pixval;
- else
- {
- pixval = gdk_image_get_pixel( img, x, tabley[h] );
- old_pixval = pixval;
- old_x = x;
- }
-
- if (bpp == 1)
- {
- if (!pixval)
- {
- char bit=1;
- char shift = bit << (w % 8);
- outbyte |= shift;
- }
-
- if ((w+1)%8==0)
- {
- dst[h*dstbyteperline+w/8] = outbyte;
- outbyte = 0;
- }
- }
- else
- {
- GdkColor col;
- col.pixel = pixval;
- gdk_gc_set_foreground( gc, &col );
- gdk_draw_point( dstpix, gc, w, h);
- }
- }
-
- // do not forget the last byte
- if ((bpp == 1) && (width % 8 != 0))
- dst[h*dstbyteperline+width/8] = outbyte;
- }
-
- gdk_image_destroy( img );
- if (gc) gdk_gc_unref( gc );
-
- if (bpp == 1)
- {
- bmp = wxBitmap( (const char *)dst, width, height, 1 );
- free( dst );
- }
-
- if (GetMask())
- {
- dstbyteperline = width/8;
- if (width % 8 != 0)
- dstbyteperline++;
- dst = (char*) malloc(dstbyteperline*height);
- img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
-
- for (int h = 0; h < height; h++)
- {
- char outbyte = 0;
- int old_x = -1;
- guint32 old_pixval = 0;
-
- for (int w = 0; w < width; w++)
- {
- guint32 pixval;
- int x = tablex[w];
- if (x == old_x)
- pixval = old_pixval;
- else
- {
- pixval = gdk_image_get_pixel( img, x, tabley[h] );
- old_pixval = pixval;
- old_x = x;
- }
-
- if (pixval)
- {
- char bit=1;
- char shift = bit << (w % 8);
- outbyte |= shift;
- }
-
- if ((w+1)%8 == 0)
- {
- dst[h*dstbyteperline+w/8] = outbyte;
- outbyte = 0;
- }
- }
-
- // do not forget the last byte
- if (width % 8 != 0)
- dst[h*dstbyteperline+width/8] = outbyte;
- }
- wxMask* mask = new wxMask;
- mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
- bmp.SetMask(mask);
-
- free( dst );
- gdk_image_destroy( img );
- }
-
- free( tablex );
- free( tabley );
- }
projects / wxWidgets.git / blobdiff