Hello.
Please consider the following snippet:
#include <podofo/podofo.h>
int main()
{
using namespace PoDoFo;
try{
PdfError::EnableLogging(false);
PdfMemDocument doc;
PdfPainter painter;
PdfFont *font = doc.CreateFont("Arial");
font->SetFontSize(40);
PdfMemDocument docToAppend;
const int PAGES_COUNT = 2; // enough for test
for(int p = 0; p < PAGES_COUNT; ++p)
{
docToAppend.CreatePage(PdfPage::CreateStandardPageSize(
ePdfPageSize_A4));
}
for(int p = 0; p < docToAppend.GetPageCount(); ++p)
{
doc.InsertPages(docToAppend, p, 1);
doc.GetPage( p ); // IF comment this line
bug dissappears OR uncomment ClearCache
}
// doc.GetPagesTree()->ClearCache();
for(int p = 0; p < doc.GetPageCount(); ++p)
{
PdfPage *pPage = doc.GetPage( p );
char text[100];
sprintf(text, "Text for page %d", p+1);
painter.SetPage(pPage);
painter.SetFont(font);
painter.DrawText( 30,
pPage->GetPageSize().GetHeight() / 2, text );
painter.FinishPage();
}
doc.Write("output.pdf");
}
catch(const PdfError &e) {
e.PrintErrorMsg();
throw;
}
return 0;
}
Firstly I'm creating 2 blank pages. Then one by one inserting that pages
into new document, but in every iteration also I'm calling fake
GetPage() which apparently creates a cache. Then I draw sample text with
page number on each page, but we get "Text for page 2" on first page and
nothing on second.
If I comment out fake "GetPage" or explicitly call "ClearCache" it works
as expected;
Thanks.
#include <podofo/podofo.h>
int main()
{
using namespace PoDoFo;
try{
PdfError::EnableLogging(false);
PdfMemDocument doc;
PdfPainter painter;
PdfFont *font = doc.CreateFont("Arial");
font->SetFontSize(40);
PdfMemDocument docToAppend;
const int PAGES_COUNT = 2; // enough for test
for(int p = 0; p < PAGES_COUNT; ++p)
{
docToAppend.CreatePage(PdfPage::CreateStandardPageSize(
ePdfPageSize_A4));
}
for(int p = 0; p < docToAppend.GetPageCount(); ++p)
{
doc.InsertPages(docToAppend, p, 1);
doc.GetPage( p ); // IF comment this line bug
dissappears OR uncomment ClearCache
}
// doc.GetPagesTree()->ClearCache();
for(int p = 0; p < doc.GetPageCount(); ++p)
{
PdfPage *pPage = doc.GetPage( p );
char text[100];
sprintf(text, "Text for page %d", p+1);
painter.SetPage(pPage);
painter.SetFont(font);
painter.DrawText( 30, pPage->GetPageSize().GetHeight()
/ 2, text );
painter.FinishPage();
}
doc.Write("output.pdf");
}
catch(const PdfError &e) {
e.PrintErrorMsg();
throw;
}
return 0;
}
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