void AEGLRenderUnit::RenderEmpties(void)
{
for(size_t q=0;q<type_cache.empties.size();q++)
{
RenderEmpty(type_cache.empties[q]);
}
}
CDIB* CRenderThread::Render(GP<DjVuImage> pImage, const CSize& size,
const CDisplaySettings& displaySettings, int nDisplayMode,
int nRotate, bool bThumbnail)
{
if (size.cx <= 0 || size.cy <= 0)
return NULL;
CSize szImage(pImage->get_width(), pImage->get_height());
int nTotalRotate = GetTotalRotate(pImage, nRotate);
CSize szScaled(size);
if (nTotalRotate % 2 != 0)
swap(szScaled.cx, szScaled.cy);
GRect rect(0, 0, szScaled.cx, szScaled.cy);
bool bScalePnmFixed = displaySettings.bScaleColorPnm;
// Use fast scaling for thumbnails.
if (bThumbnail)
bScalePnmFixed = false;
// Use default faster scaling when zoom factor is >= 1.0.
// Additionally, use the default scaling when requested
// image size is small, since quality does not matter at this
// scale. NOTE: this also deals with the special case of size (1, 1),
// which can force PnmScaleFixed into an infinite loop.
if ((szScaled.cx < 150 || szScaled.cy < 150)
|| (szScaled.cx >= szImage.cx || szScaled.cy >= szImage.cy))
bScalePnmFixed = false;
// Disable PnmFixed scaling if we perform an integer reduction of the image.
/*
for (int nReduction = 1; nReduction <= 15; ++nReduction)
{
if (szScaled.cx*nReduction > szImage.cx - nReduction
&& szScaled.cx*nReduction < szImage.cx + nReduction
&& szScaled.cy*nReduction > szImage.cy - nReduction
&& szScaled.cy*nReduction < szImage.cy + nReduction)
{
bScalePnmFixed = false;
break;
}
}
*/
// Disable PnmFixed scaling for color images according to settings
GP<IW44Image> bg44 = pImage->get_bg44();
GP<GPixmap> bgpm = pImage->get_bgpm();
GP<GPixmap> fgpm = pImage->get_fgpm();
if (!displaySettings.bScaleColorPnm && (bg44 != NULL || bgpm != NULL || fgpm != NULL)
&& nDisplayMode != CDjVuView::BlackAndWhite)
bScalePnmFixed = false;
if (bScalePnmFixed)
rect = GRect(0, 0, szImage.cx, szImage.cy);
GP<GBitmap> pGBitmap;
GP<GPixmap> pGPixmap;
try
{
switch (nDisplayMode)
{
case CDjVuView::BlackAndWhite:
pGBitmap = pImage->get_bitmap(rect, rect, 4);
break;
case CDjVuView::Foreground:
pGPixmap = pImage->get_fg_pixmap(rect, rect);
if (pGPixmap == NULL)
pGBitmap = pImage->get_bitmap(rect, rect, 4);
break;
case CDjVuView::Background:
pGPixmap = pImage->get_bg_pixmap(rect, rect);
break;
case CDjVuView::Color:
default:
pGPixmap = pImage->get_pixmap(rect, rect);
if (pGPixmap == NULL)
pGBitmap = pImage->get_bitmap(rect, rect, 4);
}
}
catch (GException&)
{
return NULL;
}
catch (CMemoryException*)
{
return NULL;
}
catch (...)
{
theApp.ReportFatalError();
}
CDIB* pBitmap = NULL;
if (pGPixmap != NULL)
{
if (nTotalRotate != 0)
pGPixmap = pGPixmap->rotate(nTotalRotate);
if (bScalePnmFixed)
pGPixmap = RescalePixmap_subpix(pGPixmap, size.cx, size.cy);
pBitmap = RenderPixmap(*pGPixmap, displaySettings);
}
else if (pGBitmap != NULL)
{
if (nTotalRotate != 0)
pGBitmap = pGBitmap->rotate(nTotalRotate);
if (bScalePnmFixed)
{
pGPixmap = RescaleBitmap_subpix(pGBitmap, size.cx, size.cy);
pBitmap = RenderPixmap(*pGPixmap, displaySettings);
}
else
{
pBitmap = RenderBitmap(*pGBitmap, displaySettings);
}
}
else
{
pBitmap = RenderEmpty(size, displaySettings);
}
if (pBitmap != NULL)
pBitmap->SetDPI(pImage->get_dpi());
return pBitmap;
}