[ft-devel] glyph metrics don't match bitmap size (2.8.1)

[Nicolas Jinchereau]

When using FT_LOAD_TARGET_LCD, the size of the rendered bitmap doesn't seem to match the size in the metrics. It's usually off by 1~2 units - is this normal?

Example:

#include <ft2build.h>

#include FT_FREETYPE_H

#include FT_LCD_FILTER_H

int main()

{

    FT_Library _library;

    FT_Init_FreeType(&_library);

    FT_Library_SetLcdFilter(_library, FT_LCD_FILTER_DEFAULT);

    FT_Face face;

    FT_New_Face(_library, "arial.ttf", 0, &face);

    FT_Set_Pixel_Sizes(face, 0, 14);

    

    FT_Int32 flags = 0;

    flags |= FT_LOAD_TARGET_LCD;

    flags |= FT_LOAD_RENDER;

    string sample = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

    for(char c : sample)

    {

        FT_Load_Char(face, (int)c, flags);

        cout << (face->glyph->bitmap.width / 3) << " ==? ";

        cout << (face->glyph->metrics.width >> 6) << endl;

    }

    FT_Done_Face(face);

    return 0;

}

Any help with this would be appreciated

   Nick