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Re: [ft-devel] FT_New_Memory_Face crashes

From: Louis Desjardins
Subject: Re: [ft-devel] FT_New_Memory_Face crashes
Date: Wed, 7 Sep 2011 17:49:28 -0700

I have managed to create a standalone linux app that builds using the same freetype library files and should reproduce the error, however in this case, FT_New_Memory_Face succeeds, but in the Android it fails (despite my checks that the input file integrity and size is maintained.) So unfortunately my standalone app will not be useful afterall.

From: address@hidden
To: address@hidden
CC: address@hidden
Subject: RE: [ft-devel] FT_New_Memory_Face crashes
Date: Wed, 7 Sep 2011 12:02:19 -0700

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).  


From: address@hidden
Date: Wed, 7 Sep 2011 13:06:36 -0400
Subject: Re: [ft-devel] FT_New_Memory_Face crashes
To: address@hidden
CC: address@hidden

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


On Sep 7, 2011, at 12:23 PM, Louis Desjardins <address@hidden> 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.


From: address@hidden
To: address@hidden
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: address@hidden [mailto:freetype-devel-bounces+david.bevan=address@hidden] On Behalf Of Louis Desjardins
Sent: 07 September 2011 00:13
To: address@hidden
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,
                            &face );
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