Hi Louis,
if I parse your sample code correctly, your LoadFile function does not
allocate a memory buffer to read in the font file. Thus you overwrite memory
big style. The declaration char buf[]; only declares a pointer to a
character buffer. The pointer has an undefined value (address) and this is
also where your data goes to. Thus your problem is not related to freetype
library but more to a uncompleted transition from Java to bare bone C/C++
programming world.
Quick Fix: :
unsigned char *LoadFile( char * fileName, zip_uint64_t &fileSize )
{
int MAX_FILE_SIZE = 10485760;
unsigned char *buf = new char[MAX_FILE_SIZE];
FILE *inFile = fopen("fileName","rb");
fileSize = (zip_uint64_t)fread(buf, sizeof(unsigned char),
MAX_FILE_SIZE, inFile);
fclose(inFile);
return buf;
}
Smart fix: first determine the actual file size with fseek / ftell prior to
allocate the buffer for maximum size. Android devices are very memory
limited.
br
Gernot
2011/9/7 Louis Desjardins <[email protected]>
> Thanks for your reply. I am still trying to get a successful Makefile
> going so I have not been able to test this standalone app yet, however in
> case it helps, I have attached the code that should provide the crash in the
> meanwhile. The main program is in Standalone.cpp and crashes within
> FT_New_Memory_Face. I have also provided a sample ttf and the freetype
> library that I am using with Android (though I have added various 'printfs'
> for debugging).
>
> Thank-you
> ------------------------------
> From: [email protected]
> Date: Wed, 7 Sep 2011 13:06:36 -0400
> Subject: Re: [ft-devel] FT_New_Memory_Face crashes
>
> To: [email protected]
> CC: [email protected]
>
>
> It should be possible to create a self standing example that will compile
> on a Linux box. It might not have to be fully equivalent as long as it fails
> in the same way and aids in debugging
>
> Chris
>
>
> On Sep 7, 2011, at 12:23 PM, Louis Desjardins <[email protected]>
> wrote:
>
> I apologize, I made a copy\paste error when providing the sample, I have
> corrected it below as they are in fact the same buffers in the code I'm
> running.
>
> Unfortunately I cannot provide a complete standalone sample as I am working
> in the Android NDK.
>
> LD
> ------------------------------
> From: <[email protected]>[email protected]
> To: <[email protected]>[email protected]
> Date: Wed, 7 Sep 2011 03:47:26 -0400
> Subject: RE: [ft-devel] FT_New_Memory_Face crashes
>
> In the code sample, FT_NEW_MEMORY_Face() is passed a different buffer
> from the one created by LoadFile().
>
>
> ------------------------------
>
> *From:* [email protected] [mailto:
> [email protected]] *On Behalf Of *Louis
> Desjardins
> *Sent:* 07 September 2011 00:13
> *To:* <[email protected]>[email protected]
> *Subject:* [ft-devel] FT_New_Memory_Face crashes
>
>
>
> I have loaded an "arial.ttf" file (taken from my /Windows/Fonts folder)
> into memory, however passing this into FT_New_Memory_Face crashes (I have
> also tried other ttf files, and this function still crashes). Any clues as
> to what I might be doing wrong? Note that I am using Freetype with the
> Android NDK, so it is difficult to debug, however I find that eventually,
> the crash occurs within:
>
> FT_New_Memory_Face -> FT_Open_Face -> FT_Stream_ReadLong -> crashes at:
>
> if ( p )
>
> {
>
> result = FT_NEXT_LONG( p ); //crashes here, in file ftstream.c,
> method FT_Stream_ReadLong
>
> }
>
>
> And below is my code:
>
> unsigned char **fontBuffer *= LoadFile("arial.ttf");
>
> zip_uint64_t fSize = GetFileSize("arial.ttf"); // I checked this, and it
> returns the correct size
>
> FT_Library library;
>
> FT_Face face;
>
> int error = FT_Init_FreeType( &library ); // I checked this, this step
> succeeds
>
> if( error != 0 )
>
> printf("FT_Init_FreeType failed");
>
>
>
> error = FT_New_Memory_Face( library,
>
> (FT_Byte*)*fontBuffer*,
>
> fSize,
>
> 0,
>
> &face );
>
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