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More freetype extension stuff

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This commit is contained in:
K. Lange 2018-09-24 12:12:56 +09:00
parent 5aeb26644c
commit 7062734f9d
1 changed files with 56 additions and 1 deletions
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57
ext/ext_freetype_fonts.c
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@ -158,7 +158,7 @@ void freetype_draw_char(gfx_context_t * ctx, int x, int y, uint32_t fg, uint32_t
}
void freetype_draw_string(gfx_context_t * ctx, int x, int y, uint32_t fg, char * string) {
int freetype_draw_string(gfx_context_t * ctx, int x, int y, uint32_t fg, char * string) {
slot = faces[selected_face]->glyph;
int pen_x = x, pen_y = y;
int error;
@ -227,6 +227,61 @@ finished:
pen_x += slot->advance.x >> 6;
pen_y += slot->advance.y >> 6;
}
return pen_x - x;
}
int freetype_draw_string_width(char * string) {
slot = faces[selected_face]->glyph;
int pen_x = 0;
int error;
uint8_t * s = (uint8_t *)string;
uint32_t codepoint;
uint32_t state = 0;
while (*s) {
uint32_t o = 0;
while (*s) {
if (!decode(&state, &codepoint, (uint8_t)*s)) {
o = (uint32_t)codepoint;
s++;
goto finished_width;
} else if (state == UTF8_REJECT) {
state = 0;
}
s++;
}
finished_width:
if (!o) continue;
FT_UInt glyph_index;
glyph_index = FT_Get_Char_Index( faces[selected_face], o);
if (glyph_index) {
error = FT_Load_Glyph(faces[selected_face], glyph_index, FT_LOAD_DEFAULT);
if (error) {
fprintf(stderr, "Error loading glyph for '%lu'\n", o);
continue;
}
slot = (faces[selected_face])->glyph;
} else {
int i = 0;
while (!glyph_index && fallbacks[i] != -1) {
int fallback = fallbacks[i++];
glyph_index = FT_Get_Char_Index( faces[fallback], o);
error = FT_Load_Glyph(faces[fallback], glyph_index, FT_LOAD_DEFAULT);
if (error) {
fprintf(stderr, "Error loading glyph for '%lu'\n", o);
continue;
}
slot = (faces[fallback])->glyph;
}
}
pen_x += slot->advance.x >> 6;
}
return pen_x;
}
__attribute__((constructor)) static void init_lib(void) {