//-----------------------------------------------------------------------------
IPlatformBitmap* CBitmap::getBestPlatformBitmapForScaleFactor (double scaleFactor) const
{
if (bitmaps.empty ())
return 0;
IPlatformBitmap* bestBitmap = bitmaps[0];
double bestDiff = std::abs (scaleFactor - bestBitmap->getScaleFactor ());
VSTGUI_RANGE_BASED_FOR_LOOP (BitmapVector, bitmaps, BitmapPointer, bitmap)
if (bitmap->getScaleFactor () == scaleFactor)
return bitmap;
else if (std::abs (scaleFactor - bitmap->getScaleFactor ()) <= bestDiff && bitmap->getScaleFactor () > bestBitmap->getScaleFactor ())
{
bestBitmap = bitmap;
bestDiff = std::abs (scaleFactor - bitmap->getScaleFactor ());
}
VSTGUI_RANGE_BASED_FOR_LOOP_END
return bestBitmap;
}
//-----------------------------------------------------------------------------
void D2DDrawContext::drawBitmap (CBitmap* bitmap, const CRect& dest, const CPoint& offset, float alpha)
{
if (renderTarget == 0)
return;
D2DApplyClip ac (this);
if (ac.isEmpty ())
return;
double transformedScaleFactor = getScaleFactor ();
CGraphicsTransform t = getCurrentTransform ();
if (t.m11 == t.m22 && t.m12 == 0 && t.m21 == 0)
transformedScaleFactor *= t.m11;
IPlatformBitmap* platformBitmap = bitmap->getBestPlatformBitmapForScaleFactor (transformedScaleFactor);
D2DBitmap* d2dBitmap = platformBitmap ? dynamic_cast<D2DBitmap*> (platformBitmap) : 0;
if (d2dBitmap)
{
if (d2dBitmap->getSource ())
{
ID2D1Bitmap* d2d1Bitmap = D2DBitmapCache::instance ()->getBitmap (d2dBitmap, renderTarget);
if (d2d1Bitmap)
{
double bitmapScaleFactor = platformBitmap->getScaleFactor ();
CGraphicsTransform bitmapTransform;
bitmapTransform.scale (bitmapScaleFactor, bitmapScaleFactor);
Transform transform (*this, bitmapTransform.inverse ());
CRect d (dest);
d.makeIntegral ();
CRect source (dest);
source.offset (-source.left, -source.top);
source.offset (offset.x, offset.y);
bitmapTransform.transform (source);
D2D1_RECT_F sourceRect = makeD2DRect (source);
renderTarget->DrawBitmap (d2d1Bitmap, makeD2DRect (d), alpha * currentState.globalAlpha, D2D1_BITMAP_INTERPOLATION_MODE_LINEAR, &sourceRect);
}
}
}
}