compile warnings, M_BITMAPDATA privatized

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

diff --git a/src/common/image.cpp b/src/common/image.cpp
index 03a7d4fb9f76fa952ea9a187135d8a7254225709..35acc5ef6da14183c3ff5adf94d0d56348e8dac6 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;


@@ -110,10 +111,6 @@ wxImage wxNullImage;
 
 IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
 
 
 IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
 

-wxImage::wxImage()
-{
-}
-

 wxImage::wxImage( int width, int height, bool clear )
 {
     Create( width, height, clear );
 wxImage::wxImage( int width, int height, bool clear )
 {
     Create( width, height, clear );


@@ -124,6 +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 );


@@ -197,6 +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();


@@ -231,7 +251,7 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
 {
     if( xFactor == 1 && yFactor == 1 )
         return Copy() ;
 {
     if( xFactor == 1 && yFactor == 1 )
         return Copy() ;

-        
+

     wxImage image;
 
     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
     wxImage image;
 
     wxCHECK_MSG( Ok(), image, wxT("invalid image") );


@@ -242,7 +262,7 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
 
     long old_height = M_IMGDATA->m_height,
          old_width  = M_IMGDATA->m_width;
 
     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") );
 
     wxCHECK_MSG( (old_height > 0) && (old_width > 0), image,
                  wxT("invalid old image size") );
 


@@ -259,20 +279,32 @@ 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 ;
         maskRed = M_IMGDATA->m_maskRed;
         maskGreen = M_IMGDATA->m_maskGreen;
         maskBlue =M_IMGDATA->m_maskBlue ;
     if (M_IMGDATA->m_hasMask)
     {
         hasMask = true ;
         maskRed = M_IMGDATA->m_maskRed;
         maskGreen = M_IMGDATA->m_maskGreen;
         maskBlue =M_IMGDATA->m_maskBlue ;

-      
+

         image.SetMaskColour( M_IMGDATA->m_maskRed,
                              M_IMGDATA->m_maskGreen,
                              M_IMGDATA->m_maskBlue );
     }
         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;
-    
+    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 x = 0; x < width; x++)
     for (long y = 0; y < height; y++)
     {
         for (long x = 0; x < width; x++)


@@ -280,6 +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 )


@@ -291,11 +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++ ;
                     }
                 }


@@ -308,6 +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);


@@ -808,6 +850,33 @@ unsigned char wxImage::GetAlpha(int x, int y) const
     return M_IMGDATA->m_alpha[y*w + x];
 }
 
     return M_IMGDATA->m_alpha[y*w + x];
 }
 

+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;
+
+    unsigned char *alpha = GetAlpha();
+    unsigned char *data = GetData();
+
+    int x,y;
+    for (y = 0; y < h; y++)
+        for (x = 0; x < w; x++)
+            {
+                *alpha = *data;
+                alpha++;
+                *data = r;
+                data++;
+                *data = g;
+                data++;
+                *data = b;
+                data++;
+            }
+
+    return true;
+}
+

 void wxImage::SetAlpha( unsigned char *alpha )
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );
 void wxImage::SetAlpha( unsigned char *alpha )
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );


@@ -935,8 +1004,8 @@ bool wxImage::SetMaskFromImage(const wxImage& mask,
 
     return true;
 }
 
     return true;
 }

-    
-bool wxImage::ConvertAlphaToMask(unsigned threshold)
+
+bool wxImage::ConvertAlphaToMask(unsigned char threshold)

 {
     if (!HasAlpha())
         return true;
 {
     if (!HasAlpha())
         return true;


@@ -954,12 +1023,12 @@ bool wxImage::ConvertAlphaToMask(unsigned threshold)
     unsigned char *imgdata = GetData();
     unsigned char *alphadata = GetAlpha();
 
     unsigned char *imgdata = GetData();
     unsigned char *alphadata = GetAlpha();
 

-    size_t w = GetWidth();
-    size_t h = GetHeight();
+    int w = GetWidth();
+    int h = GetHeight();

 
 

-    for (size_t y = 0; y < h; y++)
+    for (int y = 0; y < h; y++)

     {
     {

-        for (size_t x = 0; x < w; x++, imgdata += 3, alphadata++)
+        for (int x = 0; x < w; x++, imgdata += 3, alphadata++)

         {
             if (*alphadata < threshold)
             {
         {
             if (*alphadata < threshold)
             {


@@ -1485,7 +1554,7 @@ bool wxImageHandler::CanRead( const wxString& name )
 
 bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
 {
 
 bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
 {

-    off_t posOld = stream.TellI();
+    wxFileOffset posOld = stream.TellI();

     if ( posOld == wxInvalidOffset )
     {
         // can't test unseekable stream
     if ( posOld == wxInvalidOffset )
     {
         // can't test unseekable stream


@@ -1673,14 +1742,24 @@ 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
     unsigned char ** data = new unsigned char * [GetHeight()];
     // Create pointer-based array to accelerate access to wxImage's data
     unsigned char ** data = new unsigned char * [GetHeight()];

-

     data[0] = GetData();
     data[0] = GetData();

-

     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
+    unsigned char ** alpha = NULL;
+    if (has_alpha)
+    {
+        alpha = new unsigned char * [GetHeight()];
+        alpha[0] = GetAlpha();
+        for (i = 1; i < GetHeight(); i++)
+            alpha[i] = alpha[i - 1] + GetWidth();
+    }
+

     // precompute coefficients for rotation formula
     // (sine and cosine of the angle)
     const double cos_angle = cos(angle);
     // precompute coefficients for rotation formula
     // (sine and cosine of the angle)
     const double cos_angle = cos(angle);


@@ -1702,7 +1781,11 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
     int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
     int y2 = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y)));
 
     int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
     int y2 = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y)));
 

+    // Create rotated image

     wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false);
     wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false);

+    // With alpha channel
+    if (has_alpha)
+        rotated.SetAlpha();

 
     if (offset_after_rotation != NULL)
     {
 
     if (offset_after_rotation != NULL)
     {


@@ -1715,6 +1798,10 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
     //
     unsigned char * dst = rotated.GetData();
 
     //
     unsigned char * dst = rotated.GetData();
 

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

     // GRG: if the original image has a mask, use its RGB values
     //      as the blank pixel, else, fall back to default (black).
     //
     // GRG: if the original image has a mask, use its RGB values
     //      as the blank pixel, else, fall back to default (black).
     //


@@ -1800,28 +1887,52 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
                         unsigned char *p = data[y1] + (3 * x1);
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                         unsigned char *p = data[y1] + (3 * x1);
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);

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

                     }
                     else if (d2 < gs_Epsilon)
                     {
                         unsigned char *p = data[y1] + (3 * x2);
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                     }
                     else if (d2 < gs_Epsilon)
                     {
                         unsigned char *p = data[y1] + (3 * x2);
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);

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

                     }
                     else if (d3 < gs_Epsilon)
                     {
                         unsigned char *p = data[y2] + (3 * x2);
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                     }
                     else if (d3 < gs_Epsilon)
                     {
                         unsigned char *p = data[y2] + (3 * x2);
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);

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

                     }
                     else if (d4 < gs_Epsilon)
                     {
                         unsigned char *p = data[y2] + (3 * x1);
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);
                     }
                     else if (d4 < gs_Epsilon)
                     {
                         unsigned char *p = data[y2] + (3 * x1);
                         *(dst++) = *(p++);
                         *(dst++) = *(p++);

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

                     }
                     else
                     {
                     }
                     else
                     {


@@ -1847,6 +1958,19 @@ 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);
+                            unsigned char *v2 = alpha[y1] + (x2);
+                            unsigned char *v3 = alpha[y2] + (x2);
+                            unsigned char *v4 = alpha[y2] + (x1);
+
+                            *(alpha_dst++) = (unsigned char)
+                                ( (w1 * *v1 + w2 * *v2 +
+                                   w3 * *v3 + w4 * *v4) /
+                                  (w1 + w2 + w3 + w4) );
+                        }

                     }
                 }
                 else
                     }
                 }
                 else


@@ -1854,6 +1978,9 @@ 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;

                 }
             }
         }
                 }
             }
         }


@@ -1876,12 +2003,21 @@ 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);
+                        *(alpha_dst++) = *p;
+                    }

                 }
                 else
                 {
                     *(dst++) = blank_r;
                     *(dst++) = blank_g;
                     *(dst++) = blank_b;
                 }
                 else
                 {
                     *(dst++) = blank_r;
                     *(dst++) = blank_g;
                     *(dst++) = blank_b;

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

                 }
             }
         }
                 }
             }
         }


@@ -1889,6 +2025,9 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i
 
     delete [] data;
 
 
     delete [] data;
 

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

     return rotated;
 }
 
     return rotated;
 }