X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ec85956ae93cdbbb4351a5b34e595ea56f296fc4..cc1487e53905bd534dba2099d33ac2142cec7818:/src/common/image.cpp

diff --git a/src/common/image.cpp b/src/common/image.cpp
index d261424034..9defc7b068 100644
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -14,25 +14,26 @@
     #pragma hdrstop
 #endif
 
-#include "wx/defs.h"
-
 #if wxUSE_IMAGE
 
 #include "wx/image.h"
-#include "wx/bitmap.h"
-#include "wx/debug.h"
-#include "wx/log.h"
-#include "wx/app.h"
+
+#ifndef WX_PRECOMP
+    #include "wx/log.h"
+    #include "wx/app.h"
+    #include "wx/hash.h"
+    #include "wx/utils.h"
+    #include "wx/bitmap.h"
+    #include "wx/math.h"
+#endif
+
 #include "wx/filefn.h"
 #include "wx/wfstream.h"
 #include "wx/intl.h"
 #include "wx/module.h"
-#include "wx/hash.h"
-#include "wx/utils.h"
-#include "wx/math.h"
 
 #if wxUSE_XPM
-#include "wx/xpmdecod.h"
+    #include "wx/xpmdecod.h"
 #endif
 
 // For memcpy
@@ -107,7 +108,7 @@ wxImage wxNullImage;
 
 //-----------------------------------------------------------------------------
 
-#define M_IMGDATA ((wxImageRefData *)m_refData)
+#define M_IMGDATA wx_static_cast(wxImageRefData*, m_refData)
 
 IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
 
@@ -148,17 +149,6 @@ wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index )
 }
 #endif // wxUSE_STREAMS
 
-wxImage::wxImage( const wxImage& image )
-    : wxObject()
-{
-    Ref(image);
-}
-
-wxImage::wxImage( const wxImage* image )
-{
-    if (image) Ref(*image);
-}
-
 wxImage::wxImage( const char** xpmData )
 {
     Create(xpmData);
@@ -245,27 +235,48 @@ void wxImage::Destroy()
     UnRef();
 }
 
-wxImage wxImage::Copy() const
+wxObjectRefData* wxImage::CreateRefData() const
 {
-    wxImage image;
-
-    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
-
-    image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
+    return new wxImageRefData;
+}
 
-    unsigned char *data = image.GetData();
+wxObjectRefData* wxImage::CloneRefData(const wxObjectRefData* that) const
+{
+    const wxImageRefData* refData = wx_static_cast(const wxImageRefData*, that);
+    wxCHECK_MSG(refData->m_ok, NULL, wxT("invalid image") );
 
-    wxCHECK_MSG( data, image, wxT("unable to create image") );
+    wxImageRefData* refData_new = new wxImageRefData;
+    refData_new->m_width = refData->m_width;
+    refData_new->m_height = refData->m_height;
+    refData_new->m_maskRed = refData->m_maskRed;
+    refData_new->m_maskGreen = refData->m_maskGreen;
+    refData_new->m_maskBlue = refData->m_maskBlue;
+    refData_new->m_hasMask = refData->m_hasMask;
+    refData_new->m_ok = true;
+    unsigned size = unsigned(refData->m_width) * unsigned(refData->m_height);
+    if (refData->m_alpha != NULL)
+    {
+        refData_new->m_alpha = (unsigned char*)malloc(size);
+        memcpy(refData_new->m_alpha, refData->m_alpha, size);
+    }
+    size *= 3;
+    refData_new->m_data = (unsigned char*)malloc(size);
+    memcpy(refData_new->m_data, refData->m_data, size);
+#if wxUSE_PALETTE
+    refData_new->m_palette = refData->m_palette;
+#endif
+    refData_new->m_optionNames = refData->m_optionNames;
+    refData_new->m_optionValues = refData->m_optionValues;
+    return refData_new;
+}
 
-    image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
-    image.SetMask( M_IMGDATA->m_hasMask );
+wxImage wxImage::Copy() const
+{
+    wxImage image;
 
-    memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-    // also copy the image options
-    wxImageRefData *imgData = (wxImageRefData *)image.m_refData;
-    imgData->m_optionNames = M_IMGDATA->m_optionNames;
-    imgData->m_optionValues = M_IMGDATA->m_optionValues;
+    image.m_refData = CloneRefData(m_refData);
 
     return image;
 }
@@ -273,7 +284,7 @@ wxImage wxImage::Copy() const
 wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
 {
     if( xFactor == 1 && yFactor == 1 )
-        return Copy() ;
+        return *this;
 
     wxImage image;
 
@@ -551,9 +562,16 @@ wxImage wxImage::Mirror( bool horizontally ) const
     image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
 
     unsigned char *data = image.GetData();
+    unsigned char *alpha = NULL;
 
     wxCHECK_MSG( data, image, wxT("unable to create image") );
 
+    if (M_IMGDATA->m_alpha != NULL) {
+        image.SetAlpha();
+        alpha = image.GetAlpha();
+        wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") );
+    }
+
     if (M_IMGDATA->m_hasMask)
         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 
@@ -576,6 +594,25 @@ wxImage wxImage::Mirror( bool horizontally ) const
                 target_data -= 3;
             }
         }
+
+        if (alpha != NULL)
+        {
+            // src_alpha starts at the first pixel and increases by 1 after each step
+            // (a step here is the copy of the alpha value of one pixel)
+            const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+            // dest_alpha starts just beyond the first line, decreases before each step,
+            // and after each line is finished, increases by 2 widths (skipping the line
+            // just copied and the line that will be copied next)
+            unsigned char *dest_alpha = alpha + width;
+
+            for (long jj = 0; jj < height; ++jj)
+            {
+                for (long i = 0; i < width; ++i) {
+                    *(--dest_alpha) = *(src_alpha++); // copy one pixel
+                }
+                dest_alpha += 2 * width; // advance beyond the end of the next line
+            }
+        }
     }
     else
     {
@@ -585,6 +622,23 @@ wxImage wxImage::Mirror( bool horizontally ) const
             memcpy( target_data, source_data, (size_t)3*width );
             source_data += 3*width;
         }
+
+        if (alpha != NULL)
+        {
+            // src_alpha starts at the first pixel and increases by 1 width after each step
+            // (a step here is the copy of the alpha channel of an entire line)
+            const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+            // dest_alpha starts just beyond the last line (beyond the whole image)
+            // and decreases by 1 width before each step
+            unsigned char *dest_alpha = alpha + width * height;
+
+            for (long jj = 0; jj < height; ++jj)
+            {
+                dest_alpha -= width;
+                memcpy( dest_alpha, src_alpha, (size_t)width );
+                src_alpha += width;
+            }
+        }
     }
 
     return image;
@@ -596,32 +650,47 @@ wxImage wxImage::GetSubImage( const wxRect &rect ) const
 
     wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-    wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()),
+    wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) &&
+                 (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()),
                  image, wxT("invalid subimage size") );
 
-    int subwidth=rect.GetWidth();
-    const int subheight=rect.GetHeight();
+    const int subwidth = rect.GetWidth();
+    const int subheight = rect.GetHeight();
 
     image.Create( subwidth, subheight, false );
 
-    unsigned char *subdata = image.GetData(), *data=GetData();
+    const unsigned char *src_data = GetData();
+    const unsigned char *src_alpha = M_IMGDATA->m_alpha;
+    unsigned char *subdata = image.GetData();
+    unsigned char *subalpha = NULL;
 
     wxCHECK_MSG( subdata, image, wxT("unable to create image") );
 
+    if (src_alpha != NULL) {
+        image.SetAlpha();
+        subalpha = image.GetAlpha();
+        wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel"));
+    }
+
     if (M_IMGDATA->m_hasMask)
         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 
-    const int subleft=3*rect.GetLeft();
-    const int width=3*GetWidth();
-    subwidth*=3;
+    const int width = GetWidth();
+    const int pixsoff = rect.GetLeft() + width * rect.GetTop();
 
-    data+=rect.GetTop()*width+subleft;
+    src_data += 3 * pixsoff;
+    src_alpha += pixsoff; // won't be used if was NULL, so this is ok
 
     for (long j = 0; j < subheight; ++j)
     {
-        memcpy( subdata, data, subwidth);
-        subdata+=subwidth;
-        data+=width;
+        memcpy( subdata, src_data, 3 * subwidth );
+        subdata += 3 * subwidth;
+        src_data += 3 * width;
+        if (subalpha != NULL) {
+            memcpy( subalpha, src_alpha, subwidth );
+            subalpha += subwidth;
+            src_alpha += width;
+        }
     }
 
     return image;
@@ -651,6 +720,10 @@ wxImage wxImage::Size( const wxSize& size, const wxPoint& pos,
 
     wxRect subRect(pos.x, pos.y, width, height);
     wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight());
+    if (pos.x < 0)
+        finalRect.width -= pos.x;
+    if (pos.y < 0)
+        finalRect.height -= pos.y;
 
     subRect.Intersect(finalRect);
 
@@ -670,6 +743,8 @@ void wxImage::Paste( const wxImage &image, int x, int y )
     wxCHECK_RET( Ok(), wxT("invalid image") );
     wxCHECK_RET( image.Ok(), wxT("invalid image") );
 
+    AllocExclusive();
+
     int xx = 0;
     int yy = 0;
     int width = image.GetWidth();
@@ -751,6 +826,8 @@ void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1,
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );
 
+    AllocExclusive();
+
     unsigned char *data = GetData();
 
     const int w = GetWidth();
@@ -806,6 +883,16 @@ wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const
         }
     }
 
+    // copy the alpha channel, if any
+    if (HasAlpha())
+    {
+        const size_t alphaSize = GetWidth() * GetHeight();
+        unsigned char *alpha = (unsigned char*)malloc(alphaSize);
+        memcpy(alpha, GetAlpha(), alphaSize);
+        image.InitAlpha();
+        image.SetAlpha(alpha);
+    }
+
     return image;
 }
 
@@ -877,6 +964,8 @@ void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned c
     long pos = XYToIndex(x, y);
     wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
 
+    AllocExclusive();
+
     pos *= 3;
 
     M_IMGDATA->m_data[ pos   ] = r;
@@ -888,6 +977,8 @@ void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, uns
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );
 
+    AllocExclusive();
+
     wxRect rect(rect_);
     wxRect imageRect(0, 0, GetWidth(), GetHeight());
     if ( rect == wxRect() )
@@ -1026,6 +1117,8 @@ void wxImage::SetAlpha(int x, int y, unsigned char alpha)
     long pos = XYToIndex(x, y);
     wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
 
+    AllocExclusive();
+
     M_IMGDATA->m_alpha[pos] = alpha;
 }
 
@@ -1068,6 +1161,8 @@ void wxImage::SetAlpha( unsigned char *alpha, bool static_data )
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );
 
+    AllocExclusive();
+
     if ( !alpha )
     {
         alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height);
@@ -1129,6 +1224,8 @@ void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );
 
+    AllocExclusive();
+
     M_IMGDATA->m_maskRed = r;
     M_IMGDATA->m_maskGreen = g;
     M_IMGDATA->m_maskBlue = b;
@@ -1178,6 +1275,8 @@ void wxImage::SetMask( bool mask )
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );
 
+    AllocExclusive();
+
     M_IMGDATA->m_hasMask = mask;
 }
 
@@ -1237,6 +1336,8 @@ bool wxImage::SetMaskFromImage(const wxImage& mask,
         return false ;
     }
 
+    AllocExclusive();
+
     unsigned char *imgdata = GetData();
     unsigned char *maskdata = mask.GetData();
 
@@ -1276,6 +1377,8 @@ bool wxImage::ConvertAlphaToMask(unsigned char threshold)
         return false;
     }
 
+    AllocExclusive();
+
     SetMask(true);
     SetMaskColour(mr, mg, mb);
 
@@ -1329,6 +1432,8 @@ void wxImage::SetPalette(const wxPalette& palette)
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );
 
+    AllocExclusive();
+
     M_IMGDATA->m_palette = palette;
 }
 
@@ -1342,6 +1447,8 @@ void wxImage::SetOption(const wxString& name, const wxString& value)
 {
     wxCHECK_RET( Ok(), wxT("invalid image") );
 
+    AllocExclusive();
+
     int idx = M_IMGDATA->m_optionNames.Index(name, false);
     if (idx == wxNOT_FOUND)
     {
@@ -1389,7 +1496,9 @@ bool wxImage::HasOption(const wxString& name) const
 // image I/O
 // ----------------------------------------------------------------------------
 
-bool wxImage::LoadFile( const wxString& filename, long type, int index )
+bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+                        long WXUNUSED_UNLESS_STREAMS(type),
+                        int WXUNUSED_UNLESS_STREAMS(index) )
 {
 #if wxUSE_STREAMS
     if (wxFileExists(filename))
@@ -1409,7 +1518,9 @@ bool wxImage::LoadFile( const wxString& filename, long type, int index )
 #endif // wxUSE_STREAMS
 }
 
-bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int index )
+bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+                        const wxString& WXUNUSED_UNLESS_STREAMS(mimetype),
+                        int WXUNUSED_UNLESS_STREAMS(index) )
 {
 #if wxUSE_STREAMS
     if (wxFileExists(filename))
@@ -1447,7 +1558,8 @@ bool wxImage::SaveFile( const wxString& filename ) const
     return false;
 }
 
-bool wxImage::SaveFile( const wxString& filename, int type ) const
+bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+                        int WXUNUSED_UNLESS_STREAMS(type) ) const
 {
 #if wxUSE_STREAMS
     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
@@ -1466,7 +1578,8 @@ bool wxImage::SaveFile( const wxString& filename, int type ) const
     return false;
 }
 
-bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) const
+bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename),
+                        const wxString& WXUNUSED_UNLESS_STREAMS(mimetype) ) const
 {
 #if wxUSE_STREAMS
     wxCHECK_MSG( Ok(), false, wxT("invalid image") );
@@ -1485,22 +1598,23 @@ bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) con
     return false;
 }
 
-bool wxImage::CanRead( const wxString &name )
+bool wxImage::CanRead( const wxString& WXUNUSED_UNLESS_STREAMS(name) )
 {
 #if wxUSE_STREAMS
-  wxFileInputStream stream(name);
-  return CanRead(stream);
+    wxFileInputStream stream(name);
+    return CanRead(stream);
 #else
-  return false;
+    return false;
 #endif
 }
 
-int wxImage::GetImageCount( const wxString &name, long type )
+int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name),
+                            long WXUNUSED_UNLESS_STREAMS(type) )
 {
 #if wxUSE_STREAMS
-  wxFileInputStream stream(name);
-  if (stream.Ok())
-      return GetImageCount(stream, type);
+    wxFileInputStream stream(name);
+    if (stream.Ok())
+        return GetImageCount(stream, type);
 #endif
 
   return 0;
@@ -1594,7 +1708,7 @@ bool wxImage::LoadFile( wxInputStream& stream, long type, int index )
         return false;
     }
 
-    if (!handler->CanRead(stream))
+    if (stream.IsSeekable() && !handler->CanRead(stream))
     {
         wxLogError(_("Image file is not of type %d."), type);
         return false;
@@ -1618,7 +1732,7 @@ bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int ind
         return false;
     }
 
-    if (!handler->CanRead(stream))
+    if (stream.IsSeekable() && !handler->CanRead(stream))
     {
         wxLogError(_("Image file is not of type %s."), (const wxChar*) mimetype);
         return false;
@@ -1939,6 +2053,8 @@ wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv)
  */
 void wxImage::RotateHue(double angle)
 {
+    AllocExclusive();
+
     unsigned char *srcBytePtr;
     unsigned char *dstBytePtr;
     unsigned long count;