fixing 'main screen'

[wxWidgets.git] / include / wx / image.h

diff --git a/include/wx/image.h b/include/wx/image.h
index 03c1ea2210f694f4d5365642c27e49cd0eb55bde..cb602383d1f7badf2440795cf2ab2ecbaf958f46 100644 (file)
--- a/include/wx/image.h
+++ b/include/wx/image.h
@@ -56,10 +56,18 @@ enum wxImageResolution
 };
 
 // Constants for wxImage::Scale() for determining the level of quality
-enum
+enum wxImageResizeQuality
 {
-    wxIMAGE_QUALITY_NORMAL = 0,
-    wxIMAGE_QUALITY_HIGH = 1
+    // different image resizing algorithms used by Scale() and Rescale()
+    wxIMAGE_QUALITY_NEAREST = 0,
+    wxIMAGE_QUALITY_BILINEAR = 1,
+    wxIMAGE_QUALITY_BICUBIC = 2,
+
+    // default quality is low (but fast)
+    wxIMAGE_QUALITY_NORMAL = wxIMAGE_QUALITY_NEAREST,
+
+    // highest (but best) quality
+    wxIMAGE_QUALITY_HIGH = wxIMAGE_QUALITY_BICUBIC
 };
 
 // alpha channel values: fully transparent, default threshold separating
@@ -308,10 +316,13 @@ public:
     void Paste( const wxImage &image, int x, int y );
 
     // return the new image with size width*height
-    wxImage Scale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) const;
+    wxImage Scale( int width, int height,
+                   wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL ) const;
 
     // box averager and bicubic filters for up/down sampling
+    wxImage ResampleNearest(int width, int height) const;
     wxImage ResampleBox(int width, int height) const;
+    wxImage ResampleBilinear(int width, int height) const;
     wxImage ResampleBicubic(int width, int height) const;
 
     // blur the image according to the specified pixel radius
@@ -322,7 +333,9 @@ public:
     wxImage ShrinkBy( int xFactor , int yFactor ) const ;
 
     // rescales the image in place
-    wxImage& Rescale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) { return *this = Scale(width, height, quality); }
+    wxImage& Rescale( int width, int height,
+                      wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL )
+        { return *this = Scale(width, height, quality); }
 
     // resizes the image in place
     wxImage& Resize( const wxSize& size, const wxPoint& pos,
@@ -341,13 +354,17 @@ public:
                   unsigned char r2, unsigned char g2, unsigned char b2 );
 
     // Convert to greyscale image. Uses the luminance component (Y) of the image.
-    // The luma value (YUV) is calculated using (R * lr) + (G * lg) + (B * lb), defaults to ITU-T BT.601
-    wxImage ConvertToGreyscale( double lr = 0.299, double lg = 0.587, double lb = 0.114 ) const;
+    // The luma value (YUV) is calculated using (R * weight_r) + (G * weight_g) + (B * weight_b), defaults to ITU-T BT.601
+    wxImage ConvertToGreyscale(double weight_r, double weight_g, double weight_b) const;
+    wxImage ConvertToGreyscale(void) const;
 
     // convert to monochrome image (<r,g,b> will be replaced by white,
     // everything else by black)
     wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
 
+    // Convert to disabled (dimmed) image.
+    wxImage ConvertToDisabled(unsigned char brightness = 255) const;
+
     // these routines are slow but safe
     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
     void SetRGB( const wxRect& rect, unsigned char r, unsigned char g, unsigned char b );
@@ -434,6 +451,7 @@ public:
     bool HasAlpha() const { return GetAlpha() != NULL; }
     void SetAlpha(unsigned char *alpha = NULL, bool static_data=false);
     void InitAlpha();
+    void ClearAlpha();
 
     // return true if this pixel is masked or has alpha less than specified
     // threshold