bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
{
UnRef();
wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
wxCHECK_MSG( depth == -1 || depth == 1, FALSE, wxT("invalid bitmap depth") )
if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
return false;
m_refData = new wxBitmapRefData();
if (depth == 1)
{
return CreateFromImageAsBitmap(image);
}
else
{
#ifdef __WXGTK20__
if (image.HasAlpha())
return CreateFromImageAsPixbuf(image);
#endif
return CreateFromImageAsPixmap(image);
}
}
void wxHtmlImageCell::SetImage(const wxImage& img)
{
#if !defined(__WXMSW__) || wxUSE_WXDIB
if ( img.Ok() )
{
delete m_bitmap;
int ww, hh;
ww = img.GetWidth();
hh = img.GetHeight();
if ( m_bmpW == wxDefaultCoord )
m_bmpW = ww;
if ( m_bmpH == wxDefaultCoord )
m_bmpH = hh;
// Only scale the bitmap at the rendering stage,
// so we don't lose quality twice
/*
if ((m_bmpW != ww) || (m_bmpH != hh))
{
wxImage img2 = img.Scale(m_bmpW, m_bmpH);
m_bitmap = new wxBitmap(img2);
}
else
*/
m_bitmap = new wxBitmap(img);
}
#endif
}
/// Gets a rectangle from within another image, INCLUDING the alpha channel
/// \bug in wxWidgets, wxImage::GetSubImage should do this itself.
wxImage GetSubImageWithAlpha( const wxImage & Src, const wxRect &rect )
{
//First part of this code is lifted from wxImage::GetSubImage() source code.
wxImage image;
wxCHECK_MSG( Src.Ok(), image, wxT("invalid image") );
wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (
rect.GetRight()<=Src.GetWidth()) && (rect.GetBottom()<=Src.GetHeight()),
image, wxT("invalid subimage size") );
int subwidth=rect.GetWidth();
const int subheight=rect.GetHeight();
image.Create( subwidth, subheight, false );
unsigned char *subdata = image.GetData(), *data=Src.GetData();
wxCHECK_MSG( subdata, image, wxT("unable to create image") );
// JKC: Quick hack - don't deal with masks - need to understand macro M_IMGDATA first.
// if (Src.M_IMGDATA->m_hasMask)
// image.SetMaskColour( Src.M_IMGDATA->m_maskRed, Src.M_IMGDATA->m_maskGreen, Src.M_IMGDATA->m_maskBlue );
int subleft=3*rect.GetLeft();
int width=3*Src.GetWidth();
subwidth*=3;
data+=rect.GetTop()*width+subleft;
for (long j = 0; j < subheight; ++j)
{
memcpy( subdata, data, subwidth);
subdata+=subwidth;
data+=width;
}
// OK, so we've copied the RGB data.
// Now do the Alpha channel.
wxASSERT( Src.HasAlpha() );
image.InitAlpha();
subleft/=3;
width/=3;
subwidth/=3;
data =Src.GetAlpha();
subdata =image.GetAlpha();
data+=rect.GetTop()*width+subleft;
for (long j = 0; j < subheight; ++j)
{
memcpy( subdata, data, subwidth);
subdata+=subwidth;
data+=width;
}
return image;
}
bool wxCreateGreyedImage(const wxImage& in, wxImage& out)
{
#if wxUSE_IMAGE
out = in.ConvertToGreyscale();
if ( out.Ok() )
return true;
#endif // wxUSE_IMAGE
return false;
}
bool CFrameWnd::StretchDraw(wxDC &x_dc, wxImage &x_img, wxRect &x_rect)
{_STT();
if ( !x_img.Ok() ) return FALSE;
// The slow but portable way...
wxImage cWxImage = x_img.Copy();
cWxImage.Rescale( x_rect.GetWidth(), x_rect.GetHeight() );
x_dc.DrawBitmap( cWxImage, x_rect.x, x_rect.y );
return TRUE;
}
wxImage
FreeImage_Rescale(wxImage src, wxInt32 dst_width, wxInt32 dst_height, FREE_IMAGE_FILTER filter) {
wxImage dst;
if ((src.Ok()) && (dst_width > 0) && (dst_height > 0)) {
dst.Create(dst_width, dst_height);
// select the filter
CGenericFilter *pFilter = NULL;
switch(filter) {
case FILTER_BOX:
pFilter = new CBoxFilter();
break;
case FILTER_BICUBIC:
pFilter = new CBicubicFilter();
break;
case FILTER_BILINEAR:
pFilter = new CBilinearFilter();
break;
case FILTER_BSPLINE:
pFilter = new CBSplineFilter();
break;
case FILTER_CATMULLROM:
pFilter = new CCatmullRomFilter();
break;
case FILTER_LANCZOS3:
pFilter = new CLanczos3Filter();
break;
}
CResizeEngine Engine(pFilter);
// perform upsampling or downsampling
unsigned char *pSrc = src.GetData();
unsigned char *pDst = dst.GetData();
wxInt32 src_width = src.GetWidth();
wxInt32 src_height = src.GetHeight();
Engine.Scale(pSrc, src_width, src_height, pDst, dst_width, dst_height);
delete pFilter;
}
return dst;
}
// Creates a surface that will use wxImage's pixel data (RGB only)
static wxIDirectFBSurfacePtr CreateSurfaceForImage(const wxImage& image)
{
wxCHECK_MSG( image.Ok(), NULL, _T("invalid image") );
// FIXME_DFB: implement alpha handling by merging alpha buffer with RGB
// into a temporary RGBA surface
wxCHECK_MSG( !image.HasAlpha(), NULL, _T("alpha channel not supported") );
DFBSurfaceDescription desc;
desc.flags = (DFBSurfaceDescriptionFlags)
(DSDESC_CAPS | DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT |
DSDESC_PREALLOCATED);
desc.caps = DSCAPS_NONE;
desc.width = image.GetWidth();
desc.height = image.GetHeight();
desc.pixelformat = DSPF_RGB24;
desc.preallocated[0].data = image.GetData();
desc.preallocated[0].pitch = 3 * desc.width;
return wxIDirectFB::Get()->CreateSurface(&desc);
}
wxBitmap::wxBitmap(const wxImage& image, int depth)
{
wxCHECK_RET( image.Ok(), wxT("invalid image") );
// create surface in screen's format:
if ( !Create(image.GetWidth(), image.GetHeight(), depth) )
return;
// then copy the image to it:
wxIDirectFBSurfacePtr src(CreateSurfaceForImage(image));
wxIDirectFBSurfacePtr dst = M_BITMAP->m_surface;
if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
return;
if ( !dst->Blit(src->GetRaw(), NULL, 0, 0) )
return;
// FIXME: implement mask creation from image's mask (or alpha channel?)
wxASSERT_MSG( !image.HasMask(), _T("image masks are ignored for now") );
}
/*static*/ void
wxMemoryFSHandler::AddFile(const wxString& filename,
const wxImage& image,
wxBitmapType type)
{
if ( !CheckDoesntExist(filename) )
return;
wxMemoryOutputStream mems;
if ( image.Ok() && image.SaveFile(mems, type) )
{
m_Hash[filename] = new wxMemoryFSFile
(
mems,
wxImage::FindHandler(type)->GetMimeType()
);
}
else
{
wxLogError(_("Failed to store image '%s' to memory VFS!"), filename);
}
}
bool wxDIB::Create(const wxImage& image)
{
wxCHECK_MSG( image.Ok(), false, wxT("invalid wxImage in wxDIB ctor") );
const int h = image.GetHeight();
const int w = image.GetWidth();
// if we have alpha channel, we need to create a 32bpp RGBA DIB, otherwise
// a 24bpp RGB is sufficient
m_hasAlpha = image.HasAlpha();
const int bpp = m_hasAlpha ? 32 : 24;
if ( !Create(w, h, bpp) )
return false;
// DIBs are stored in bottom to top order (see also the comment above in
// Create()) so we need to copy bits line by line and starting from the end
const int srcBytesPerLine = w * 3;
const int dstBytesPerLine = GetLineSize(w, bpp);
const unsigned char *src = image.GetData() + ((h - 1) * srcBytesPerLine);
const unsigned char *alpha = m_hasAlpha ? image.GetAlpha() + (h - 1)*w
: NULL;
unsigned char *dstLineStart = (unsigned char *)m_data;
for ( int y = 0; y < h; y++ )
{
// copy one DIB line
unsigned char *dst = dstLineStart;
if ( alpha )
{
for ( int x = 0; x < w; x++ )
{
// RGB order is reversed, and we need to premultiply
// all channels by alpha value for use with ::AlphaBlend.
const unsigned char a = *alpha++;
*dst++ = (unsigned char)((src[2] * a + 127) / 255);
*dst++ = (unsigned char)((src[1] * a + 127) / 255);
*dst++ = (unsigned char)((src[0] * a + 127) / 255);
*dst++ = a;
src += 3;
}
}
else // no alpha channel
{
for ( int x = 0; x < w; x++ )
{
// RGB order is reversed.
*dst++ = src[2];
*dst++ = src[1];
*dst++ = src[0];
src += 3;
}
}
// pass to the previous line in the image
src -= 2*srcBytesPerLine;
if ( alpha )
alpha -= 2*w;
// and to the next one in the DIB
dstLineStart += dstBytesPerLine;
}
return true;
}