//-----------------------------------------------------------------------------
IPlatformBitmap* IPlatformBitmap::createFromPath (UTF8StringPtr absolutePath)
{
UTF8StringHelper path (absolutePath);
IStream* stream = 0;
if (SUCCEEDED (SHCreateStreamOnFileEx (path, STGM_READ|STGM_SHARE_DENY_WRITE, 0, false, 0, &stream)))
{
#if VSTGUI_DIRECT2D_SUPPORT
if (getD2DFactory ())
{
D2DBitmap* result = new D2DBitmap ();
if (result->loadFromStream (stream))
{
stream->Release ();
return result;
}
stream->Release ();
result->forget ();
return 0;
}
#endif
GdiplusBitmap* bitmap = new GdiplusBitmap ();
if (bitmap->loadFromStream (stream))
{
stream->Release ();
return bitmap;
}
bitmap->forget ();
stream->Release ();
}
return 0;
}
//-----------------------------------------------------------------------------
COffscreenContext* Win32Frame::createOffscreenContext (CCoord width, CCoord height)
{
#if VSTGUI_DIRECT2D_SUPPORT
if (getD2DFactory ())
{
D2DBitmap* bitmap = new D2DBitmap (CPoint (width, height));
D2DDrawContext* context = new D2DDrawContext (bitmap);
bitmap->forget ();
return context;
}
#endif
GdiplusBitmap* bitmap = new GdiplusBitmap (CPoint (width, height));
GdiplusDrawContext* context = new GdiplusDrawContext (bitmap);
bitmap->forget ();
return context;
}
//-----------------------------------------------------------------------------
IPlatformBitmap* IPlatformBitmap::createFromMemory (const void* ptr, uint32_t memSize)
{
#ifdef __GNUC__
typedef IStream* (*SHCreateMemStreamProc) (const BYTE* pInit, UINT cbInit);
HMODULE shlwDll = LoadLibraryA ("shlwapi.dll");
SHCreateMemStreamProc proc = reinterpret_cast<SHCreateMemStreamProc> (GetProcAddress (shlwDll, MAKEINTRESOURCEA (12)));
IStream* stream = proc (static_cast<const BYTE*> (ptr), memSize);
#else
IStream* stream = SHCreateMemStream ((const BYTE*)ptr, memSize);
#endif
if (stream)
{
#if VSTGUI_DIRECT2D_SUPPORT
if (getD2DFactory ())
{
D2DBitmap* result = new D2DBitmap ();
if (result->loadFromStream (stream))
{
stream->Release ();
return result;
}
stream->Release ();
result->forget ();
return 0;
}
#endif
GdiplusBitmap* bitmap = new GdiplusBitmap ();
if (bitmap->loadFromStream (stream))
{
stream->Release ();
return bitmap;
}
bitmap->forget ();
stream->Release ();
}
#ifdef __GNUC__
FreeLibrary (shlwDll);
#endif
return 0;
}
//-----------------------------------------------------------------------------
void GdiplusDrawContext::drawBitmap (CBitmap* cbitmap, const CRect& dest, const CPoint& offset, float alpha)
{
alpha *= currentState.globalAlpha;
if (alpha == 0.f || pGraphics == 0)
return;
IPlatformBitmap* platformBitmap = cbitmap ? cbitmap->getPlatformBitmap () : 0;
GdiplusBitmap* gpb = platformBitmap ? dynamic_cast<GdiplusBitmap*> (platformBitmap) : 0;
Gdiplus::Bitmap* bitmap = gpb ? gpb->getBitmap () : 0;
if (bitmap)
{
GdiplusDrawScope drawScope (pGraphics, currentState.clipRect, getCurrentTransform ());
Gdiplus::ImageAttributes imageAtt;
if (alpha != 1.f)
{
// introducing the alpha blend matrix
Gdiplus::ColorMatrix colorMatrix =
{
1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f, alpha, 0.0f,
0.0f, 0.0f, 0.0f, 0.0f, 0.0f,
};
// create the imageattribute modifier
imageAtt.SetColorMatrix (&colorMatrix, Gdiplus::ColorMatrixFlagsDefault,
Gdiplus::ColorAdjustTypeBitmap);
#if 1
Gdiplus::Rect myDestRect(
(INT)dest.left,
(INT)dest.top,
(INT)dest.getWidth (),
(INT)dest.getHeight ());
pGraphics->DrawImage (
bitmap,
myDestRect,
(INT)offset.x,
(INT)offset.y,
(INT)dest.getWidth (),
(INT)dest.getHeight (),
Gdiplus::UnitPixel,
&imageAtt);
#else
// create a temporary bitmap to prevent OutOfMemory errors
Gdiplus::Bitmap myBitmapBuffer ((INT)dest.getWidth (), (INT)dest.getHeight (),PixelFormat32bppARGB);
// create a graphics context for the temporary bitmap
Gdiplus::Graphics* myGraphicsBuffer = Gdiplus::Graphics::FromImage (&myBitmapBuffer);
// copy the rectangle we want to paint to the temporary bitmap
Gdiplus::Rect myTransRect(
0,
0,
(INT)dest.getWidth (),
(INT)dest.getHeight ());
// transfer the bitmap (without modification by imageattr!)
myGraphicsBuffer->DrawImage (
bitmap,myTransRect,
(INT)offset.x,
(INT)offset.y,
(INT)dest.getWidth (),
(INT)dest.getHeight (),
Gdiplus::UnitPixel,
0);
// now transfer the temporary to the real context at the advised location
Gdiplus::Rect myDestRect (
(INT)dest.left,
(INT)dest.top,
(INT)dest.getWidth (),
(INT)dest.getHeight ());
// transfer from temporary bitmap to real context (with imageattr)
pGraphics->DrawImage (
&myBitmapBuffer,
myDestRect,
(INT)0,
(INT)0,
(INT)dest.getWidth (),
(INT)dest.getHeight (),
Gdiplus::UnitPixel,
&imageAtt);
// delete the temporary context of the temporary bitmap
delete myGraphicsBuffer;
#endif
}
else
{
Gdiplus::Rect myDestRect(
(INT)dest.left,
(INT)dest.top,
(INT)dest.getWidth (),
(INT)dest.getHeight ());
pGraphics->DrawImage (
bitmap,
myDestRect,
(INT)offset.x,
(INT)offset.y,
(INT)dest.getWidth (),
(INT)dest.getHeight (),
Gdiplus::UnitPixel,
0);
}
}
}
