Text vetorization

[Anonymous]

Hello

We use RealDWG 2014.

We want to implement our own viewer using RealDWG. How can I vectorize text objects in AcGiWorldGeometry::text method? I know AutoCAD uses Heidi driver to render texts, are any samples describing how to solve this problem?

[philippe.leefsma]

Here is a link to a post that illustrate the use of AcGiTextEngine::tessellate method. I hope it will be helpful:

How to explode a text entity

[Anonymous]

Thanks for reply. I have written sample code but function 'AcGiTextEngine::tessellate' doesn't call 'PolylineCallback'. Should I initialize something before using it?

// fPCallBack - polyline callback, receives vertices
void fPCallBack(int x, int const *y, AcGePoint3d const *z, void *l)
{
    printf("fPCallBack()\n");
}

// fUnicodeCallback - unicode function call back, does nothing in current implementation
void fUnicodeCallback(long x, unsigned short const *y, int z, void *l)
{
    printf("fUnicodeCallback()\n");
}


int main(void)
{
	acdbSetHostApplicationServices(&gCreatentHostApp);
	long lcid = 0x00000409;  // English
    acdbValidateSetup(lcid);
	AcDbDatabase *db = new AcDbDatabase(false, true);

	db->readDwgFile(L"test.dwg");
	AcTransaction *trans = db->transactionManager()->startTransaction();
	AcDbBlockTable *blockTable;
	db->getBlockTable(blockTable, AcDb::kForRead);

	AcGiTextEngine *pTextEngine = AcGiTextEngine::create();
	if (blockTable != NULL)
	{
		AcDbBlockTableIterator *blockTableIt;
		blockTable->newIterator(blockTableIt);
		while (!blockTableIt->done())
		{
			AcDbBlockTableRecord *block;
			blockTableIt->getRecord(block, AcDb::kForRead);
			AcDbBlockTableRecordIterator *blockIt;
			Acad::ErrorStatus e = block->newIterator(blockIt);
			while (!blockIt->done())
			{
				AcDbEntity *entity;
				blockIt->getEntity(entity, AcDb::kForRead);
				if (entity->isKindOf(AcDbText::desc()))
				{
					AcDbText *pText = static_cast<AcDbText *>(entity);
					wprintf(L"Text: %s\n", pText->textString());

					AcDbTextStyleTableRecord *pTextStyle;
					acdbOpenObject(pTextStyle, pText->textStyle(), AcDb::kForRead, false);
					bool bIsTTF = false;
					const ACHAR* pFileName;
					pTextStyle->fileName(pFileName);
					if(NULL != wcsstr(pFileName, L".TTF") || NULL != wcsstr(pFileName, L".ttf"))
						bIsTTF = true;
					pTextStyle->close();

					AcGiTextStyle mStyle;
					fromAcDbTextStyle(mStyle, pText->textStyle());
					if (bIsTTF)
						pTextEngine->tessellate(mStyle,pText->textString(),-1,true,NULL,(UnicodeCallback)fUnicodeCallback,(PolylineCallback)fPCallBack);
					else
						pTextEngine->tessellate(mStyle,pText->textString(),-1,true,0.0,NULL,(PolylineCallback)fPCallBack);
				}
				blockIt->step();
			}
			blockTableIt->step();
		}
	}
	db->transactionManager()->endTransaction();

	delete db;

	return 0;
}

[philippe.leefsma]

It gets invoked on my side. Attached is the sample I used to test.

Regards,

Philippe.

[Anonymous]

Hello,

Thanks it works now, I didn't call setWorkingDatabase. Now I have another problem. In function AcGiGeometry::text I receive AcGiTextStyle object but for TrueType fonts function AcGiTextStyle::fileName returns NULL. RealDWG doesn't call AcDbHostApplicationServices::findFile for such fonts (with hint kTrueTypeFontFile) to search. I'm attaching sample file.

[nick83]

as i know this works just for vector fonts. true type fonts can't be vectorized

[Anonymous]

I implemented vectorization of TrueType fonts on my side but I need only get informations about fonts used in texts. I noticed that it works for AcDbText but doesn't for AcDbMText with the same style.