Re: [ft-devel] FT_New_Memory_Face crashes

[Louis Desjardins]

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.

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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).  

Thank-you

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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

Chris

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.

LD

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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().

 

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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,

                            (FT_Byte*)fontBuffer,

                            fSize,                  

                            0,                      

                            &face );

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