Ehm... fixed my comment about DJGPP to say what I wanted it to say

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

diff --git a/src/common/image.cpp b/src/common/image.cpp
index 5086141878f886a24d990458bd6db1dea9b28239..ee46631c932cde21bfbfb9929b019e0b55533e9e 100644 (file)
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -58,7 +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;
 };
@@ -235,6 +237,9 @@ wxImage wxImage::Scale( int width, int height ) const
     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;
@@ -255,6 +260,20 @@ wxImage wxImage::Scale( int width, int height ) const
             target_data += 3;
         }
     }
+#else
+    for (long j = 0; j < height; j++)
+    {
+        long y_offset = (j * old_height / height) * old_width;
+
+        for (long i = 0; i < width; i++)
+        {
+            memcpy( target_data,
+                source_data + 3*(y_offset + ((i * old_width )/ width)),
+                3 );
+            target_data += 3;
+        }
+    }
+#endif
 
     return image;
 }
@@ -701,6 +720,100 @@ int wxImage::GetHeight() const
     return M_IMGDATA->m_height;
 }
 
+
+bool wxImage::FindFirstUnusedColour(
+            unsigned char *r, unsigned char *g, unsigned char *b,
+            unsigned char startR, unsigned char startG, unsigned char startB)
+{
+    wxHashTable hTable;
+    unsigned long key;
+   
+    ComputeHistogram( hTable );
+    
+    unsigned char r2 = startR;
+    unsigned char g2 = startG;
+    unsigned char b2 = startB;
+    
+    key = (r2 << 16) | (g2 << 8) | b2;
+
+    while ( (wxHNode *) hTable.Get(key) )
+    {
+        // color already used
+        r2++;
+        if ( r2 >= 255 )
+        {
+            r2 = 0;
+            g2++;
+            if ( g2 >= 255 )
+            {
+                g2 = 0;
+                b2++;
+                if ( b2 >= 255 )
+                {
+                    wxLogError( _("GetUnusedColour:: No Unused Color in image ") );            
+                    return FALSE;                              
+                }
+            }
+        }
+        
+        key = (r2 << 16) | (g2 << 8) | b2;
+    }
+    
+    if (r) *r = r2;
+    if (g) *g = g2;
+    if (b) *b = b2;
+    
+    return TRUE;
+}
+
+
+bool wxImage::SetMaskFromImage(const wxImage& mask, 
+                               unsigned char mr, unsigned char mg, unsigned char mb)
+{
+    // check that the images are the same size
+    if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) )
+    {
+        wxLogError( _("Image and Mask have different sizes") );            
+        return FALSE;
+    }
+    
+    // find unused colour
+    unsigned char r,g,b ;
+    if (!FindFirstUnusedColour(&r, &g, &b))
+    {
+        wxLogError( _("No Unused Color in image being masked") );            
+        return FALSE ;
+    }
+        
+    char unsigned *imgdata = GetData();
+    char unsigned *maskdata = mask.GetData();
+
+    const int w = GetWidth();
+    const int h = GetHeight();
+
+    for (int j = 0; j < h; j++)
+    {
+        for (int i = 0; i < w; i++)
+        {
+            if ((maskdata[0] == mr) && (maskdata[1]  == mg) && (maskdata[2] == mb))
+            {
+                imgdata[0] = r;
+                imgdata[1] = g;
+                imgdata[2] = b;
+            }
+            imgdata  += 3;
+            maskdata += 3;
+        }
+    }
+
+    SetMaskColour(r, g, b);
+    SetMask(TRUE);
+    
+    return TRUE;
+}
+
+#if wxUSE_PALETTE
+
 // Palette functions
 
 bool wxImage::HasPalette() const
@@ -725,6 +838,8 @@ 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)
 {
@@ -1160,7 +1275,7 @@ unsigned long wxImage::CountColours( unsigned long stopafter )
     wxHashTable h;
     wxObject dummy;
     unsigned char r, g, b;
-       unsigned char *p;
+    unsigned char *p;
     unsigned long size, nentries, key;
 
     p = GetData();
@@ -1195,7 +1310,7 @@ unsigned long wxImage::CountColours( unsigned long stopafter )
 unsigned long wxImage::ComputeHistogram( wxHashTable &h )
 {
     unsigned char r, g, b;
-       unsigned char *p;
+    unsigned char *p;
     unsigned long size, nentries, key;
     wxHNode *hnode;