#include "wx/image.h"
#include "wx/xpmdecod.h"
+#ifdef wxHAVE_RAW_BITMAP
#include "wx/rawbmp.h"
+#endif
// missing from mingw32 header
#ifndef CLR_INVALID
wxDC *m_selectedInto;
#endif // __WXDEBUG__
+ // when GetRawData() is called for a DDB we need to convert it to a DIB
+ // first to be able to provide direct access to it and we cache that DIB
+ // here and convert it back to DDB when UngetRawData() is called
+ wxDIB *m_dib;
+
// true if we have alpha transparency info and can be drawn using
// AlphaBlend()
bool m_hasAlpha;
+ // true if our HBITMAP is a DIB section, false if it is a DDB
+ bool m_isDIB;
+
private:
// optional mask for transparent drawing
wxMask *m_bitmapMask;
m_selectedInto = NULL;
#endif
m_bitmapMask = NULL;
+
m_hBitmap = (WXHBITMAP) NULL;
+ m_dib = NULL;
+
+ m_isDIB =
m_hasAlpha = FALSE;
}
wxASSERT_MSG( !m_selectedInto,
wxT("deleting bitmap still selected into wxMemoryDC") );
+ wxASSERT_MSG( !m_dib, _T("forgot to call wxBitmap::UngetRawData()!") );
+
if ( m_hBitmap)
{
if ( !::DeleteObject((HBITMAP)m_hBitmap) )
(void)Create(w, h, d);
}
+wxBitmap::wxBitmap(int w, int h, const wxDC& dc)
+{
+ Init();
+
+ (void)Create(w, h, dc);
+}
+
wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
{
Init();
// don't delete the DIB section in dib object dtor
hbmp = dib.Detach();
+ GetBitmapData()->m_isDIB = TRUE;
GetBitmapData()->m_depth = d;
- GetBitmapData()->m_hasAlpha = d == 32; // 32bpp DIBs have alpha channel
}
else // create a DDB
{
HBITMAP hbitmap;
// are we going to use DIB?
- if ( wxShouldCreateDIB(w, h, depth, hdc) )
+ //
+ // NB: DDBs don't support alpha so if we have alpha channel we must use DIB
+ if ( image.HasAlpha() || wxShouldCreateDIB(w, h, depth, hdc) )
{
// don't delete the DIB section in dib object dtor
hbitmap = dib.Detach();
+ refData->m_isDIB = TRUE;
refData->m_depth = dib.GetDepth();
}
else // we need to convert DIB to DDB
// wxBitmap accessors
// ----------------------------------------------------------------------------
+#if wxUSE_PALETTE
wxPalette* wxBitmap::GetPalette() const
{
return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette
: (wxPalette *) NULL;
}
+#endif
wxMask *wxBitmap::GetMask() const
{
#endif // WXWIN_COMPATIBILITY_2_4
+void wxBitmap::UseAlpha()
+{
+ if ( GetBitmapData() )
+ GetBitmapData()->m_hasAlpha = true;
+}
+
bool wxBitmap::HasAlpha() const
{
return GetBitmapData() && GetBitmapData()->m_hasAlpha;
// raw bitmap access support
// ----------------------------------------------------------------------------
-bool wxBitmap::GetRawData(wxRawBitmapData *data)
+#ifdef wxHAVE_RAW_BITMAP
+void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
{
- wxCHECK_MSG( data, FALSE, _T("NULL pointer in wxBitmap::GetRawData") );
-
if ( !Ok() )
{
// no bitmap, no data (raw or otherwise)
- return FALSE;
+ return NULL;
+ }
+
+ // if we're already a DIB we can access our data directly, but if not we
+ // need to convert this DDB to a DIB section and use it for raw access and
+ // then convert it back
+ HBITMAP hDIB;
+ if ( !GetBitmapData()->m_isDIB )
+ {
+ wxCHECK_MSG( !GetBitmapData()->m_dib, FALSE,
+ _T("GetRawData() may be called only once") );
+
+ wxDIB *dib = new wxDIB(*this);
+ if ( !dib->IsOk() )
+ {
+ delete dib;
+
+ return NULL;
+ }
+
+ // we'll free it in UngetRawData()
+ GetBitmapData()->m_dib = dib;
+
+ hDIB = dib->GetHandle();
+ }
+ else // we're a DIB
+ {
+ hDIB = GetHbitmap();
}
- // we only support raw access to the DIBs, so check if we have one
DIBSECTION ds;
- if ( !::GetObject(GetHbitmap(), sizeof(ds), &ds) )
+ if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) )
{
- return FALSE;
+ wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") );
+
+ return NULL;
}
- // ok, store the relevant info in wxRawBitmapData
+ // check that the bitmap is in correct format
+ if ( ds.dsBm.bmBitsPixel != bpp )
+ {
+ wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") );
+
+ return NULL;
+ }
+
+ // ok, store the relevant info in wxPixelDataBase
const LONG h = ds.dsBm.bmHeight;
- data->m_width = ds.dsBm.bmWidth;
- data->m_height = h;
- data->m_bypp = ds.dsBm.bmBitsPixel / 8;
+ data.m_width = ds.dsBm.bmWidth;
+ data.m_height = h;
// remember that DIBs are stored in top to bottom order!
const LONG bytesPerRow = ds.dsBm.bmWidthBytes;
- data->m_stride = -bytesPerRow;
- data->m_pixels = (unsigned char *)ds.dsBm.bmBits;
+ data.m_stride = -bytesPerRow;
+
+ char *bits = (char *)ds.dsBm.bmBits;
if ( h > 1 )
{
- data->m_pixels += (h - 1)*bytesPerRow;
+ bits += (h - 1)*bytesPerRow;
}
- return TRUE;
+ return bits;
+}
+
+void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
+{
+ if ( !Ok() )
+ return;
+
+ // the cast is ugly but we can't do without it and without making this
+ // function template (and hence inline) unfortunately
+ typedef wxPixelData<wxBitmap, wxAlphaPixelFormat> PixelData;
+ PixelData& data = (PixelData &)dataBase;
+
+ if ( !data )
+ {
+ // invalid data, don't crash -- but don't assert neither as we're
+ // called automatically from wxPixelDataBase dtor and so there is no
+ // way to prevent this from happening
+ return;
+ }
+
+ if ( GetBitmapData()->m_hasAlpha )
+ {
+ // AlphaBlend() wants to have premultiplied source alpha but
+ // wxRawBitmap API uses normal, not premultiplied, colours, so adjust
+ // them here now
+ PixelData::Iterator p(data);
+
+ const int w = data.GetWidth();
+ const int h = data.GetHeight();
+
+ for ( int y = 0; y < h; y++ )
+ {
+ PixelData::Iterator rowStart = p;
+
+ for ( int x = 0; x < w; x++ )
+ {
+ const unsigned alpha = p.Alpha();
+
+ p.Red() = (p.Red() * alpha + 127) / 255;
+ p.Blue() = (p.Blue() * alpha + 127) / 255;
+ p.Green() = (p.Green() * alpha + 127) / 255;
+
+ ++p;
+ }
+
+ p = rowStart;
+ p.OffsetY(data, 1);
+ }
+
+ // if we're a DDB we need to convert DIB back to DDB now to make the
+ // changes made via raw bitmap access effective
+ if ( !GetBitmapData()->m_isDIB )
+ {
+ wxDIB *dib = GetBitmapData()->m_dib;
+ GetBitmapData()->m_dib = NULL;
+
+ // TODO: convert
+
+ delete dib;
+ }
+ }
}
+#endif // #ifdef wxHAVE_RAW_BITMAP
// ----------------------------------------------------------------------------
// wxMask
projects / wxWidgets.git / blobdiff