replaced C++ comments with C ones

[wxWidgets.git] / src / common / image.cpp

diff --git a/src/common/image.cpp b/src/common/image.cpp
index ef7c6c123e4578ff3ff505d095292826121eff61..fe48bf366af3b2f6e342ad7a56964c8cea4b8fcb 100644 (file)
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -18,6 +18,10 @@
     #pragma hdrstop
 #endif
 
+#include "wx/defs.h"
+
+#if wxUSE_IMAGE
+
 #include "wx/image.h"
 #include "wx/bitmap.h"
 #include "wx/debug.h"
@@ -54,7 +58,9 @@ public:
     unsigned char   m_maskRed,m_maskGreen,m_maskBlue;
     bool            m_ok;
     bool            m_static;
+#if wxUSE_PALETTE
     wxPalette       m_palette;
+#endif // wxUSE_PALETTE
     wxArrayString   m_optionNames;
     wxArrayString   m_optionValues;
 };
@@ -206,7 +212,14 @@ wxImage wxImage::Scale( int width, int height ) const
 
     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-    wxCHECK_MSG( (width > 0) && (height > 0), image, wxT("invalid image size") );
+    // can't scale to/from 0 size
+    wxCHECK_MSG( (width > 0) && (height > 0), image,
+                 wxT("invalid new image size") );
+
+    long old_height = M_IMGDATA->m_height,
+         old_width  = M_IMGDATA->m_width;
+    wxCHECK_MSG( (old_height > 0) && (old_width > 0), image,
+                 wxT("invalid old image size") );
 
     image.Create( width, height );
 
@@ -215,14 +228,39 @@ wxImage wxImage::Scale( int width, int height ) const
     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 old_height = M_IMGDATA->m_height;
-    long old_width  = M_IMGDATA->m_width;
+    {
+        image.SetMaskColour( M_IMGDATA->m_maskRed,
+                             M_IMGDATA->m_maskGreen,
+                             M_IMGDATA->m_maskBlue );
+    }
 
     char unsigned *source_data = M_IMGDATA->m_data;
     char unsigned *target_data = data;
 
+#if 0
+    // This is nonsense, RR.
+
+    // We do (x, y) -> (x, y)*oldSize/newSize but the valid values of x and y
+    // are from 0 to size-1, hence all decrement the sizes
+    long old_old_width = old_width;
+    old_height--;
+    old_width--;
+    height--;
+    width--;
+    for ( long j = 0; j <= height; j++ )
+    {
+        // don't crash for images with height == 1
+        long y_offset = height ? (j * old_height / height)* old_old_width : 0;
+
+        for ( long i = 0; i <= width; i++ )
+        {
+            long x_offset = width ? (i * old_width) / width : 0;
+
+            memcpy( target_data, source_data + 3*(y_offset + x_offset), 3 );
+            target_data += 3;
+        }
+    }
+#else
     for (long j = 0; j < height; j++)
     {
         long y_offset = (j * old_height / height) * old_width;
@@ -235,6 +273,7 @@ wxImage wxImage::Scale( int width, int height ) const
             target_data += 3;
         }
     }
+#endif
 
     return image;
 }
@@ -410,31 +449,31 @@ void wxImage::Paste( const wxImage &image, int x, int y )
         }
         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) && 
+                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;
         }
@@ -464,7 +503,7 @@ void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1,
         }
 }
 
-wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b )
+wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const
 {
     wxImage image;
 
@@ -681,6 +720,8 @@ int wxImage::GetHeight() const
     return M_IMGDATA->m_height;
 }
 
+#if wxUSE_PALETTE
+
 // Palette functions
 
 bool wxImage::HasPalette() const
@@ -705,6 +746,8 @@ void wxImage::SetPalette(const wxPalette& palette)
     M_IMGDATA->m_palette = palette;
 }
 
+#endif // wxUSE_PALETTE
+
 // Option functions (arbitrary name/value mapping)
 void wxImage::SetOption(const wxString& name, const wxString& value)
 {
@@ -1019,7 +1062,10 @@ wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
 
 void wxImage::InitStandardHandlers()
 {
-  AddHandler( new wxBMPHandler );
+    AddHandler(new wxBMPHandler);
+#if wxUSE_XPM && !defined(__WXGTK__) && !defined(__WXMOTIF__)
+    AddHandler(new wxXPMHandler);
+#endif
 }
 
 void wxImage::CleanUpHandlers()
@@ -1084,7 +1130,7 @@ bool wxImageHandler::CanRead( const wxString& name )
 #if wxUSE_GUI
 
 #ifdef __WXGTK__
-wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue )
+wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const
 {
     wxImage mono = this->ConvertToMono( red, green, blue );
     wxBitmap bitmap( mono, 1 );
@@ -1136,7 +1182,8 @@ unsigned long wxImage::CountColours( unsigned long stopafter )
 {
     wxHashTable h;
     wxObject dummy;
-    unsigned char r, g, b, *p;
+    unsigned char r, g, b;
+    unsigned char *p;
     unsigned long size, nentries, key;
 
     p = GetData();
@@ -1170,7 +1217,8 @@ unsigned long wxImage::CountColours( unsigned long stopafter )
 //
 unsigned long wxImage::ComputeHistogram( wxHashTable &h )
 {
-    unsigned char r, g, b, *p;
+    unsigned char r, g, b;
+    unsigned char *p;
     unsigned long size, nentries, key;
     wxHNode *hnode;
 
@@ -1460,3 +1508,4 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
     return rotated;
 }
 
+#endif // wxUSE_IMAGE