added debug/release DLL configurations so that VC++ chooses the right one when buildi...

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

diff --git a/src/common/image.cpp b/src/common/image.cpp
index a86831b26b0dfa77e7542ffb3d8fb907ac3fef48..204c4b665740e2ed47e4ea436eff91a85d85fdbb 100644 (file)
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -33,10 +33,10 @@
 #include "wx/module.h"
 #include "wx/hash.h"
 #include "wx/utils.h"
 #include "wx/module.h"
 #include "wx/hash.h"
 #include "wx/utils.h"

+#include "wx/math.h"

 
 // For memcpy
 #include <string.h>
 
 // For memcpy
 #include <string.h>

-#include <math.h>

 
 #ifdef __SALFORDC__
     #undef FAR
 
 #ifdef __SALFORDC__
     #undef FAR


@@ -94,10 +94,11 @@ wxImageRefData::wxImageRefData()
 
 wxImageRefData::~wxImageRefData()
 {
 
 wxImageRefData::~wxImageRefData()
 {

-    if ( !m_static )
+    if (!m_static)
+    {

         free( m_data );
         free( m_data );

-
-    free(m_alpha);
+        free( m_alpha );
+    }

 }
 
 wxList wxImage::sm_handlers;
 }
 
 wxList wxImage::sm_handlers;


@@ -120,6 +121,11 @@ wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
     Create( width, height, data, static_data );
 }
 
     Create( width, height, data, static_data );
 }
 

+wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
+{
+    Create( width, height, data, alpha, static_data );
+}
+

 wxImage::wxImage( const wxString& name, long type, int index )
 {
     LoadFile( name, type, index );
 wxImage::wxImage( const wxString& name, long type, int index )
 {
     LoadFile( name, type, index );


@@ -193,6 +199,24 @@ bool wxImage::Create( int width, int height, unsigned char* data, bool static_da
     return true;
 }
 
     return true;
 }
 

+bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
+{
+    UnRef();
+
+    wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
+
+    m_refData = new wxImageRefData();
+
+    M_IMGDATA->m_data = data;
+    M_IMGDATA->m_alpha = alpha;
+    M_IMGDATA->m_width = width;
+    M_IMGDATA->m_height = height;
+    M_IMGDATA->m_ok = true;
+    M_IMGDATA->m_static = static_data;
+
+    return true;
+}
+

 void wxImage::Destroy()
 {
     UnRef();
 void wxImage::Destroy()
 {
     UnRef();


@@ -255,6 +279,11 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
     unsigned char maskRed = 0;
     unsigned char maskGreen = 0;
     unsigned char maskBlue =0 ;
     unsigned char maskRed = 0;
     unsigned char maskGreen = 0;
     unsigned char maskBlue =0 ;

+
+    unsigned char *source_data = M_IMGDATA->m_data;
+    unsigned char *target_data = data;
+    unsigned char *source_alpha = 0 ;
+    unsigned char *target_alpha = 0 ;

     if (M_IMGDATA->m_hasMask)
     {
         hasMask = true ;
     if (M_IMGDATA->m_hasMask)
     {
         hasMask = true ;


@@ -266,8 +295,15 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
                              M_IMGDATA->m_maskGreen,
                              M_IMGDATA->m_maskBlue );
     }
                              M_IMGDATA->m_maskGreen,
                              M_IMGDATA->m_maskBlue );
     }

-    char unsigned *source_data = M_IMGDATA->m_data;
-    char unsigned *target_data = data;
+    else
+    {
+        source_alpha = M_IMGDATA->m_alpha ;
+        if ( source_alpha )
+        {
+            image.SetAlpha() ;
+            target_alpha = image.GetAlpha() ;
+        }
+    }

 
     for (long y = 0; y < height; y++)
     {
 
     for (long y = 0; y < height; y++)
     {


@@ -276,6 +312,7 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
             unsigned long avgRed = 0 ;
             unsigned long avgGreen = 0;
             unsigned long avgBlue = 0;
             unsigned long avgRed = 0 ;
             unsigned long avgGreen = 0;
             unsigned long avgBlue = 0;

+            unsigned long avgAlpha = 0 ;

             unsigned long counter = 0 ;
             // determine average
             for ( int y1 = 0 ; y1 < yFactor ; ++y1 )
             unsigned long counter = 0 ;
             // determine average
             for ( int y1 = 0 ; y1 < yFactor ; ++y1 )


@@ -287,11 +324,18 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
                     unsigned char red = pixel[0] ;
                     unsigned char green = pixel[1] ;
                     unsigned char blue = pixel[2] ;
                     unsigned char red = pixel[0] ;
                     unsigned char green = pixel[1] ;
                     unsigned char blue = pixel[2] ;

+                    unsigned char alpha = 255  ;
+                    if ( source_alpha )
+                        alpha = *(source_alpha + y_offset + x * xFactor + x1) ;

                     if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue )
                     {
                     if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue )
                     {

-                        avgRed += red ;
-                        avgGreen += green ;
-                        avgBlue += blue ;
+                        if ( alpha > 0 )
+                        {
+                            avgRed += red ;
+                            avgGreen += green ;
+                            avgBlue += blue ;
+                        }
+                        avgAlpha += alpha ;

                         counter++ ;
                     }
                 }
                         counter++ ;
                     }
                 }


@@ -304,6 +348,8 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
             }
             else
             {
             }
             else
             {

+                if ( source_alpha )
+                    *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ;

                 *(target_data++) = (unsigned char)(avgRed / counter);
                 *(target_data++) = (unsigned char)(avgGreen / counter);
                 *(target_data++) = (unsigned char)(avgBlue / counter);
                 *(target_data++) = (unsigned char)(avgRed / counter);
                 *(target_data++) = (unsigned char)(avgGreen / counter);
                 *(target_data++) = (unsigned char)(avgBlue / counter);


@@ -348,15 +394,26 @@ wxImage wxImage::Scale( int width, int height ) const
 
     wxCHECK_MSG( data, image, wxT("unable to create image") );
 
 
     wxCHECK_MSG( data, image, wxT("unable to create image") );
 

+    unsigned char *source_data = M_IMGDATA->m_data;
+    unsigned char *target_data = data;
+    unsigned char *source_alpha = 0 ;
+    unsigned char *target_alpha = 0 ;
+    

     if (M_IMGDATA->m_hasMask)
     {
         image.SetMaskColour( M_IMGDATA->m_maskRed,
                              M_IMGDATA->m_maskGreen,
                              M_IMGDATA->m_maskBlue );
     }
     if (M_IMGDATA->m_hasMask)
     {
         image.SetMaskColour( M_IMGDATA->m_maskRed,
                              M_IMGDATA->m_maskGreen,
                              M_IMGDATA->m_maskBlue );
     }

-
-    unsigned char *source_data = M_IMGDATA->m_data;
-    unsigned char *target_data = data;
+    else
+    {
+        source_alpha = M_IMGDATA->m_alpha ;
+        if ( source_alpha )
+        {
+            image.SetAlpha() ;
+            target_alpha = image.GetAlpha() ;
+        }
+    }

 
     long x_delta = (old_width<<16) / width;
     long y_delta = (old_height<<16) / height;
 
     long x_delta = (old_width<<16) / width;
     long y_delta = (old_height<<16) / height;


@@ -367,15 +424,19 @@ wxImage wxImage::Scale( int width, int height ) const
     for ( long j = 0; j < height; j++ )
         {
         unsigned char* src_line = &source_data[(y>>16)*old_width*3];
     for ( long j = 0; j < height; j++ )
         {
         unsigned char* src_line = &source_data[(y>>16)*old_width*3];

-
+        unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ;
+        

         long x = 0;
         for ( long i = 0; i < width; i++ )
         {
              unsigned char* src_pixel = &src_line[(x>>16)*3];
         long x = 0;
         for ( long i = 0; i < width; i++ )
         {
              unsigned char* src_pixel = &src_line[(x>>16)*3];

+             unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ;

              dest_pixel[0] = src_pixel[0];
              dest_pixel[1] = src_pixel[1];
              dest_pixel[2] = src_pixel[2];
              dest_pixel += 3;
              dest_pixel[0] = src_pixel[0];
              dest_pixel[1] = src_pixel[1];
              dest_pixel[2] = src_pixel[2];
              dest_pixel += 3;

+             if ( source_alpha )
+                *(target_alpha++) = *src_alpha_pixel ;

              x += x_delta;
         }
 
              x += x_delta;
         }
 


@@ -807,13 +868,13 @@ unsigned char wxImage::GetAlpha(int x, int y) const
 bool wxImage::ConvertColourToAlpha( unsigned char r, unsigned char g, unsigned char b )
 {
     SetAlpha( NULL );
 bool wxImage::ConvertColourToAlpha( unsigned char r, unsigned char g, unsigned char b )
 {
     SetAlpha( NULL );

-    
+

     int w = M_IMGDATA->m_width,
         h = M_IMGDATA->m_height;
     int w = M_IMGDATA->m_width,
         h = M_IMGDATA->m_height;

-    
+

     unsigned char *alpha = GetAlpha();
     unsigned char *data = GetData();
     unsigned char *alpha = GetAlpha();
     unsigned char *data = GetData();

-    
+

     int x,y;
     for (y = 0; y < h; y++)
         for (x = 0; x < w; x++)
     int x,y;
     for (y = 0; y < h; y++)
         for (x = 0; x < w; x++)


@@ -851,6 +912,44 @@ unsigned char *wxImage::GetAlpha() const
     return M_IMGDATA->m_alpha;
 }
 
     return M_IMGDATA->m_alpha;
 }
 

+void wxImage::InitAlpha()
+{
+    wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") );
+
+    // initialize memory for alpha channel
+    SetAlpha();
+
+    unsigned char *alpha = M_IMGDATA->m_alpha;
+    const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height;
+
+    static const unsigned char ALPHA_TRANSPARENT = 0;
+    static const unsigned char ALPHA_OPAQUE = 0xff;
+    if ( HasMask() )
+    {
+        // use the mask to initialize the alpha channel.
+        const unsigned char * const alphaEnd = alpha + lenAlpha;
+
+        const unsigned char mr = M_IMGDATA->m_maskRed;
+        const unsigned char mg = M_IMGDATA->m_maskGreen;
+        const unsigned char mb = M_IMGDATA->m_maskBlue;
+        for ( unsigned char *src = M_IMGDATA->m_data;
+              alpha < alphaEnd;
+              src += 3, alpha++ )
+        {
+            *alpha = (src[0] == mr && src[1] == mg && src[2] == mb)
+                            ? ALPHA_TRANSPARENT
+                            : ALPHA_OPAQUE;
+        }
+
+        M_IMGDATA->m_hasMask = false;
+    }
+    else // no mask
+    {
+        // make the image fully opaque
+        memset(alpha, ALPHA_OPAQUE, lenAlpha);
+    }
+}
+

 // ----------------------------------------------------------------------------
 // mask support
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // mask support
 // ----------------------------------------------------------------------------


@@ -1065,8 +1164,6 @@ wxString wxImage::GetOption(const wxString& name) const
 
 int wxImage::GetOptionInt(const wxString& name) const
 {
 
 int wxImage::GetOptionInt(const wxString& name) const
 {

-    wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
-

     return wxAtoi(GetOption(name));
 }
 
     return wxAtoi(GetOption(name));
 }
 


@@ -1695,7 +1792,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
 {
     int i;
     angle = -angle;     // screen coordinates are a mirror image of "real" coordinates
 {
     int i;
     angle = -angle;     // screen coordinates are a mirror image of "real" coordinates

-    
+

     bool has_alpha = HasAlpha();
 
     // Create pointer-based array to accelerate access to wxImage's data
     bool has_alpha = HasAlpha();
 
     // Create pointer-based array to accelerate access to wxImage's data


@@ -1704,7 +1801,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
     for (i = 1; i < GetHeight(); i++)
         data[i] = data[i - 1] + (3 * GetWidth());
 
     for (i = 1; i < GetHeight(); i++)
         data[i] = data[i - 1] + (3 * GetWidth());
 

-    // Same for alpha channel    
+    // Same for alpha channel

     unsigned char ** alpha = NULL;
     if (has_alpha)
     {
     unsigned char ** alpha = NULL;
     if (has_alpha)
     {


@@ -1751,7 +1848,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
     //      array here (and in fact it would be slower).
     //
     unsigned char * dst = rotated.GetData();
     //      array here (and in fact it would be slower).
     //
     unsigned char * dst = rotated.GetData();

-    
+

     unsigned char * alpha_dst = NULL;
     if (has_alpha)
         alpha_dst = rotated.GetAlpha();
     unsigned char * alpha_dst = NULL;
     if (has_alpha)
         alpha_dst = rotated.GetAlpha();


@@ -1842,7 +1939,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         *(dst++) = *p;
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         *(dst++) = *p;

-                        
+

                         if (has_alpha)
                         {
                             unsigned char *p = alpha[y1] + x1;
                         if (has_alpha)
                         {
                             unsigned char *p = alpha[y1] + x1;


@@ -1855,7 +1952,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         *(dst++) = *p;
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         *(dst++) = *p;

-                        
+

                         if (has_alpha)
                         {
                             unsigned char *p = alpha[y1] + x2;
                         if (has_alpha)
                         {
                             unsigned char *p = alpha[y1] + x2;


@@ -1868,7 +1965,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         *(dst++) = *p;
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         *(dst++) = *p;

-                        
+

                         if (has_alpha)
                         {
                             unsigned char *p = alpha[y2] + x2;
                         if (has_alpha)
                         {
                             unsigned char *p = alpha[y2] + x2;


@@ -1881,7 +1978,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         *(dst++) = *p;
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         *(dst++) = *p;

-                        
+

                         if (has_alpha)
                         {
                             unsigned char *p = alpha[y2] + x1;
                         if (has_alpha)
                         {
                             unsigned char *p = alpha[y2] + x1;


@@ -1912,7 +2009,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                             ( (w1 * *v1 + w2 * *v2 +
                                w3 * *v3 + w4 * *v4) /
                               (w1 + w2 + w3 + w4) );
                             ( (w1 * *v1 + w2 * *v2 +
                                w3 * *v3 + w4 * *v4) /
                               (w1 + w2 + w3 + w4) );

-                              
+

                         if (has_alpha)
                         {
                             unsigned char *v1 = alpha[y1] + (x1);
                         if (has_alpha)
                         {
                             unsigned char *v1 = alpha[y1] + (x1);


@@ -1932,7 +2029,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                     *(dst++) = blank_r;
                     *(dst++) = blank_g;
                     *(dst++) = blank_b;
                     *(dst++) = blank_r;
                     *(dst++) = blank_g;
                     *(dst++) = blank_b;

-                   
+

                     if (has_alpha)
                         *(alpha_dst++) = 0;
                 }
                     if (has_alpha)
                         *(alpha_dst++) = 0;
                 }


@@ -1957,7 +2054,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                     *(dst++) = *(p++);
                     *(dst++) = *(p++);
                     *(dst++) = *p;
                     *(dst++) = *(p++);
                     *(dst++) = *(p++);
                     *(dst++) = *p;

-                    
+

                     if (has_alpha)
                     {
                         unsigned char *p = alpha[ys] + (xs);
                     if (has_alpha)
                     {
                         unsigned char *p = alpha[ys] + (xs);


@@ -1969,7 +2066,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                     *(dst++) = blank_r;
                     *(dst++) = blank_g;
                     *(dst++) = blank_b;
                     *(dst++) = blank_r;
                     *(dst++) = blank_g;
                     *(dst++) = blank_b;

-                    
+

                     if (has_alpha)
                         *(alpha_dst++) = 255;
                 }
                     if (has_alpha)
                         *(alpha_dst++) = 255;
                 }


@@ -1978,7 +2075,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
     }
 
     delete [] data;
     }
 
     delete [] data;

-    
+

     if (has_alpha)
         delete [] alpha;
 
     if (has_alpha)
         delete [] alpha;