Bug in texture_font_load_glyphs

[ltqsoft]

Program crashed with access violation error when I set texture atlas depth to 3, it worked fine with depth=1.
The other depth settings are yet to be checked so I don't know it also works or not.

[rougier]

Do you have more information, like a working/non working example ?

[ltqsoft]

Here is my example code:

#include "freetype-gl.h"
#include <stdio.h>

#define ALLCHARS "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!@#$%^&*()_+| ,./<>?[]{}"

int main()
{
texture_atlas_t* atlas = texture_atlas_new(512, 512, 3);
texture_font_t* font = texture_font_new_from_file(atlas, 32, "Arial.ttf");
font->rendermode = RENDER_SIGNED_DISTANCE_FIELD;
printf("Loaded %d glyphs\n", texture_font_load_glyphs(font, ALLCHARS));
getchar();
}

I built the project without using cmake this time (just manually add source files), and at the second time the exception has been thrown at a different line.
If those works on your machine, may be I should rebuild FreeType, or I did messed something up with source files.

[rougier]

Do you know which line is faulty?

[ltqsoft]

The program stopped at texture_atlas.c, line 98. And here are some content in my own source file, is it different?

94 for( i=0; i<height; ++i )
95 {
96 memcpy( self->data+((y+i)self->width + x ) * charsize * depth,
97 data + (istride) * charsize, width * charsize * depth );
98 }

[rougier]

From these information it is difficult to identify the problem. You should print all information (x,y,i,charsize,depth,etc.) to see if there's weird values.

[ltqsoft]

I think there's a problem with loading the NULL glyph, if I comment it out, the program runs successfully (but I yet don't know if it works correctly).

[rougier]

Why do you get a NULL glyph?

[ltqsoft]

Oops, I mean the glyph represent the NULL character ('\0'), it was loaded first of all by the texture_font_init(...) function.

[rougier]

Can you track (e.g. using printf) what is the faulty line?