BOOL PreviewFilterPNG::GetExportOptions(BitmapExportOptions* pOptions)
{
ERROR2IF(pOptions == NULL, FALSE, "NULL Args");
ERROR3IF(!pOptions->IS_KIND_OF(PNGExportOptions), "pOptions isn't a PNGExportOptions");
PNGExportOptions* pPNGOptions = (PNGExportOptions*)pOptions;
// the depth we ask GDraw to render is always 32-bit, so we can get transparency
// we have to convert for other formats when writing the actual bytes to the file
SetDepthToRender(32);
// We haven't written the header yet
WrittenHeader = FALSE;
/////////////////////////////////////////////////////////////////////////
// BitmapExportOptions
//
// this dpi will be used to scale the preview
pPNGOptions->SetDPI(96.0);
// the export depth of the preview is always 8
pPNGOptions->SetDepth(8);
// I'm fairly sure this isn't used for anything in WEBSTER-Martin-17/01/97
//PreviewDither = ?;
PreviewPalette = PAL_OPTIMISED;
/////////////////////////////////////////////////////////////////////////
// MaskedFilterExportOptions
//
pPNGOptions->SetDither( XARADITHER_NONE );
// Previews have an optimized palette
PaletteType = PreviewPalette;
// pPNGOptions->SetPalette( (PALETTE)PreviewPalette );
// Previews have no interlace/transparency
// pPNGOptions->SetMakeTransparent( FALSE );
pPNGOptions->SetTransparencyIndex(-1);
pPNGOptions->SetMakeInterlaced( FALSE );
// We are a first pass render and not doing the mask, by default
SecondPass = FALSE;
DoingMask = FALSE;
// Default will range from 0 to 4 types which correspond to the combinations of
// on/off interlaced and on/off transparent
Compression = 0; // Previews have no interlace/transparency
// Determine the filter type currently in use in Accusoft format
FilterID = FILTERID_PNG;
pPNGOptions->SetFilterType(PNG);
return TRUE;
}
