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added CopyFromDIB()

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19719 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2003-03-23 01:45:37 +00:00
parent a2f10a1768
commit b0ea5d9603
2 changed files with 41 additions and 80 deletions
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13
include/wx/msw/bitmap.h
View File

@ -20,16 +20,16 @@
#include "wx/gdicmn.h"
#include "wx/palette.h"
class WXDLLEXPORT wxDC;
class WXDLLEXPORT wxControl;
class WXDLLEXPORT wxBitmap;
class WXDLLEXPORT wxBitmapHandler;
class WXDLLEXPORT wxBitmapRefData;
class WXDLLEXPORT wxIcon;
class WXDLLEXPORT wxMask;
class WXDLLEXPORT wxCursor;
class WXDLLEXPORT wxControl;
class WXDLLEXPORT wxCursor;
class WXDLLEXPORT wxDC;
class WXDLLEXPORT wxDIB;
class WXDLLEXPORT wxIcon;
class WXDLLEXPORT wxImage;
class WXDLLEXPORT wxMask;
class WXDLLEXPORT wxPalette;
class WXDLLEXPORT wxRawBitmapData;
@ -119,6 +119,9 @@ public:
// copies the contents and mask of the given cursor to the bitmap
bool CopyFromCursor(const wxCursor& cursor);
// copies from a device independent bitmap
bool CopyFromDIB(const wxDIB& dib);
virtual bool Create(int width, int height, int depth = -1);
virtual bool Create(int width, int height, const wxDC& dc);
virtual bool Create(void *data, long type, int width, int height, int depth = 1);

108
src/msw/bitmap.cpp
View File

@ -306,6 +306,38 @@ bool wxBitmap::CopyFromIcon(const wxIcon& icon)
#endif // Win16/Win32
}
bool wxBitmap::CopyFromDIB(const wxDIB& dib)
{
wxCHECK_MSG( dib.IsOk(), FALSE, _T("invalid DIB in CopyFromDIB") );
HBITMAP hbitmap = dib.CreateDDB();
if ( !hbitmap )
return FALSE;
UnRef();
wxBitmapRefData *refData = new wxBitmapRefData;
m_refData = refData;
refData->m_width = dib.GetWidth();
refData->m_height = dib.GetHeight();
refData->m_depth = dib.GetDepth();
refData->m_hBitmap = (WXHBITMAP)hbitmap;
#if wxUSE_PALETTE
wxPalette *palette = dib.CreatePalette();
if ( palette )
{
refData->m_bitmapPalette = *palette;
}
delete palette;
#endif // wxUSE_PALETTE
return TRUE;
}
wxBitmap::~wxBitmap()
{
}
@ -744,81 +776,7 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc )
}
else // we need to convert DIB to DDB
{
// create and set the device-dependent bitmap
//
// VZ: why don't we just use SetDIBits() instead? because of the
// palette or is there some other reason?
hbitmap = ::CreateCompatibleBitmap(hdc ? (HDC)hdc : ScreenHDC(), w, h);
if ( !hbitmap )
{
wxLogLastError(_T("CreateCompatibleBitmap()"));
return FALSE;
}
MemoryHDC hdcMem;
SelectInHDC select(hdcMem, hbitmap);
if ( !select )
{
wxLogLastError(_T("SelectObjct(hBitmap)"));
}
#if wxUSE_PALETTE
const wxPalette& palette = image.GetPalette();
HPALETTE hOldPalette;
if ( palette.Ok() )
{
SetPalette(palette);
hOldPalette = ::SelectPalette
(
hdcMem,
GetHpaletteOf(palette),
FALSE // ignored for hdcMem
);
if ( !hOldPalette )
{
wxLogLastError(_T("SelectPalette()"));
}
if ( ::RealizePalette(hdcMem) == GDI_ERROR )
{
wxLogLastError(_T("RealizePalette()"));
}
}
else // no valid palette
{
hOldPalette = 0;
}
#endif // wxUSE_PALETTE
DIBSECTION ds;
if ( !::GetObject(dib.GetHandle(), sizeof(ds), &ds) )
{
wxLogLastError(_T("GetObject(hDIB)"));
}
if ( ::StretchDIBits(hdcMem,
0, 0, w, h,
0, 0, w, h,
dib.GetData(),
(BITMAPINFO *)&ds.dsBmih,
DIB_RGB_COLORS,
SRCCOPY) == GDI_ERROR )
{
wxLogLastError(_T("StretchDIBits()"));
return FALSE;
}
#if wxUSE_PALETTE
if ( hOldPalette )
{
::SelectPalette(hdcMem, hOldPalette, FALSE);
}
#endif // wxUSE_PALETTE
hbitmap = dib.CreateDDB((HDC)hdc);
refData->m_depth = depth == -1 ? wxDisplayDepth() : depth;
}