void glf_get_string_bb(gl_tex_font_p glf, const char *text, int n, GLfloat *x0, GLfloat *y0, GLfloat *x1, GLfloat *y1)
{
*x0 = 0.0;
*x1 = 0.0;
*y0 = 0.0;
*y1 = 0.0;
if((glf != nullptr) && (glf->ft_face != nullptr))
{
uint8_t *nch;
uint8_t *nch2;
uint8_t *ch = (uint8_t*)text;
float x = 0.0;
float y = 0.0;
float xx0, xx1, yy0, yy1;
int i;
uint32_t curr_utf32, next_utf32;
nch = utf8_to_utf32(ch, &curr_utf32);
curr_utf32 = FT_Get_Char_Index(glf->ft_face, curr_utf32);
for(i = 0; (*ch != 0) && !((n >= 0) && (i >= n)); i++)
{
FT_Vector kern;
char_info_p g = glf->glyphs + curr_utf32;
nch2 = utf8_to_utf32(nch, &next_utf32);
next_utf32 = FT_Get_Char_Index(glf->ft_face, next_utf32);
ch = nch;
nch = nch2;
FT_Get_Kerning(glf->ft_face, curr_utf32, next_utf32, FT_KERNING_UNSCALED, &kern); // kern in 1/64 pixel
curr_utf32 = next_utf32;
xx0 = x + g->left;
xx1 = xx0 + g->width;
yy0 = y + g->top;
yy1 = yy0 - g->height;
bbox_add(&xx0, &xx1, &yy0, &yy1, x0, x1, y0, y1);
x += static_cast<GLfloat>(kern.x + g->advance_x) / 64.0;
y += static_cast<GLfloat>(kern.y + g->advance_y) / 64.0;
}
}
}
void glf_get_string_bb(gl_tex_font_p glf, const char *text, int n, int32_t *x0, int32_t *y0, int32_t *x1, int32_t *y1)
{
uint8_t *ch = (uint8_t*)text;
*x0 = 0;
*x1 = 0;
*y0 = 0;
*y1 = 0;
if(glf && glf->ft_face && *ch)
{
FT_Vector kern;
int32_t x_pt = 0;
int32_t y_pt = 0;
int32_t xx0, xx1, yy0, yy1;
uint32_t curr_utf32, next_utf32;
ch = utf8_to_utf32(ch, &curr_utf32);
curr_utf32 = FT_Get_Char_Index(glf->ft_face, curr_utf32);
for(int i = 0; (n < 0) || (i < n); i++)
{
char_info_p g = glf->glyphs + curr_utf32;
n = (*ch) ? (n) : (0);
ch = utf8_to_utf32(ch, &next_utf32);
next_utf32 = FT_Get_Char_Index(glf->ft_face, next_utf32);
FT_Get_Kerning(glf->ft_face, curr_utf32, next_utf32, FT_KERNING_UNSCALED, &kern); // kern in 1/64 pixel
curr_utf32 = next_utf32;
xx0 = x_pt + g->left * 64;
xx1 = xx0 + g->width * 64;
yy0 = y_pt + g->top * 64;
yy1 = yy0 - g->height * 64;
bbox_add(&xx0, &xx1, &yy0, &yy1, x0, x1, y0, y1);
x_pt += kern.x + g->advance_x_pt;
y_pt += kern.y + g->advance_y_pt;
}
}
}
