#pragma hdrstop
#endif
-#include "wx/defs.h"
-
#if wxUSE_IMAGE
+#ifndef WX_PRECOMP
+ #include "wx/log.h"
+ #include "wx/app.h"
+ #include "wx/hash.h"
+ #include "wx/utils.h"
+#endif
+
#include "wx/image.h"
#include "wx/bitmap.h"
#include "wx/debug.h"
-#include "wx/log.h"
-#include "wx/app.h"
#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
}
#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);
memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
- // also copy the image options
wxImageRefData *imgData = (wxImageRefData *)image.m_refData;
+
+ // also copy the alpha channel
+ if (HasAlpha())
+ {
+ image.SetAlpha();
+ unsigned char* alpha = image.GetAlpha();
+ memcpy( alpha, GetAlpha(), M_IMGDATA->m_width*M_IMGDATA->m_height );
+ }
+
+ // also copy the image options
imgData->m_optionNames = M_IMGDATA->m_optionNames;
imgData->m_optionValues = M_IMGDATA->m_optionValues;
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 );
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
{
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;
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;
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);
return false;
}
- if (!handler->CanRead(stream))
+ if (stream.IsSeekable() && !handler->CanRead(stream))
{
wxLogError(_("Image file is not of type %d."), type);
return false;
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;
projects / wxWidgets.git / blobdiff