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Use CIFile to load font instead of internal Freetype functions, issue #261

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--HG--
branch : develop
This commit is contained in:
kervala 2016-02-20 18:01:57 +01:00
parent aaecf96b67
commit 6d21e22905
1 changed files with 102 additions and 2 deletions
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104
code/nel/src/3d/font_generator.cpp
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@ -22,6 +22,7 @@
#include "nel/misc/debug.h"
#include "nel/misc/common.h"
#include "nel/misc/path.h"
#include "nel/misc/file.h"
#include "nel/3d/font_generator.h"
@ -81,6 +82,93 @@ CFontGenerator *newCFontGenerator(const std::string &fontFileName)
return new CFontGenerator(fontFileName);
}
// Freetype will call this function to get a buffer in data
static unsigned long nlFreetypeStreamIo(FT_Stream stream, unsigned long offset, unsigned char* buffer, unsigned long count)
{
// if count is 0, we don't need to do anything
if (count > 0)
{
// get a pointer on our CIFile
CIFile *file = (CIFile*)stream->descriptor.pointer;
// try to seek to offset
if (file->seek(offset, IStream::begin))
{
try
{
// try to fill buffer with data from file
file->serialBuffer(buffer, count);
}
catch(const EFile &e)
{
nlwarning("Unable to read %u bytes from position %u of %s", (uint)count, (uint)offset, file->getStreamName().c_str());
count = 0;
}
}
else
{
nlwarning("Unable to seek to position %u of %s", (uint)offset, file->getStreamName().c_str());
count = 0;
}
}
return count;
}
// Freetype will call this function when it won't need to access to file anymore
static void nlFreetypeStreamClose(FT_Stream stream)
{
if (!stream) return;
// get a pointer on our CIFile
CIFile *file = (CIFile*)stream->descriptor.pointer;
if (file)
{
// close and delete file
file->close();
delete file;
stream->descriptor.pointer = NULL;
}
// free Freetype stream structure
free(stream);
}
// helper to open a font and use our functions to handle BNP files and UTF-8 filenames
static bool createFreetypeStream(const std::string &filename, FT_Open_Args &args)
{
CIFile *file = new CIFile();
if (!file->open(filename))
{
nlwarning("Unable to open %s", filename.c_str());
return false;
}
args.flags = FT_OPEN_STREAM;
args.stream = (FT_Stream)malloc(sizeof(*args.stream));
if (args.stream == NULL)
{
nlwarning("Unable to allocate FT_Stream for %s", filename.c_str());
delete file;
return false;
}
args.stream->base = NULL; // only used for memory streams
args.stream->size = file->getFileSize();
args.stream->pos = 0;
args.stream->descriptor.pointer = file;
args.stream->pathname.pointer = NULL; // filename is already managed by CIFile
args.stream->read = nlFreetypeStreamIo;
args.stream->close = nlFreetypeStreamClose;
return true;
}
/*
* Constructor
*/
@ -102,7 +190,14 @@ CFontGenerator::CFontGenerator (const std::string &fontFileName, const std::stri
}
++_LibraryInit;
error = FT_New_Face (_Library, fontFileName.c_str (), 0, &_Face);
FT_Open_Args args;
if (!createFreetypeStream(fontFileName, args))
{
nlerror ("createFreetypeStream failed with file '%s'", fontFileName.c_str());
}
error = FT_Open_Face(_Library, &args, 0, &_Face);
if (error)
{
nlerror ("FT_New_Face() failed with file '%s': %s", fontFileName.c_str(), getFT2Error(error));
@ -117,7 +212,12 @@ CFontGenerator::CFontGenerator (const std::string &fontFileName, const std::stri
if (!fontEx.empty())
{
error = FT_Attach_File (_Face, fontEx.c_str ());
if (!createFreetypeStream(fontEx, args))
{
nlerror ("createFreetypeStream failed with file '%s'", fontFileName.c_str());
}
error = FT_Attach_Stream(_Face, &args);
if (error)
{
nlwarning ("FT_Attach_File() failed with file '%s': %s", fontEx.c_str(), getFT2Error(error));