271 lines
6.5 KiB
C
271 lines
6.5 KiB
C
#include "evas_common.h"
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/* string extents */
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void
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evas_common_font_query_size(RGBA_Font *fn, const char *text, int *w, int *h)
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{
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int use_kerning;
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int pen_x, pen_y;
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int start_x, end_x;
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int chr;
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FT_UInt prev_index;
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start_x = 0;
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end_x = 0;
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pen_x = 0;
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pen_y = 0;
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evas_common_font_size_use(fn);
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use_kerning = FT_HAS_KERNING(fn->src->ft.face);
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prev_index = 0;
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for (chr = 0; text[chr];)
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{
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FT_UInt index;
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RGBA_Font_Glyph *fg;
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int chr_x, chr_y, chr_w;
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int gl;
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gl = evas_common_font_utf8_get_next((unsigned char *)text, &chr);
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if (gl == 0) break;
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index = FT_Get_Char_Index(fn->src->ft.face, gl);
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if ((use_kerning) && (prev_index) && (index))
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{
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FT_Vector delta;
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FT_Get_Kerning(fn->src->ft.face, prev_index, index,
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ft_kerning_default, &delta);
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pen_x += delta.x << 2;
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}
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fg = evas_common_font_cache_glyph_get(fn, index);
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if (!fg) continue;
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chr_x = (pen_x >> 8) + fg->glyph_out->left;
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chr_y = (pen_y >> 8) + fg->glyph_out->top;
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chr_w = fg->glyph_out->bitmap.width;
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if (!prev_index) start_x = chr_x;
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if ((chr_x + chr_w) > end_x) end_x = chr_x + chr_w;
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pen_x += fg->glyph->advance.x >> 8;
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prev_index = index;
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}
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if (w) *w = end_x - start_x;
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if (h) *h = evas_common_font_max_ascent_get(fn) + evas_common_font_max_descent_get(fn);
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}
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/* text x inset */
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int
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evas_common_font_query_inset(RGBA_Font *fn, const char *text)
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{
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FT_UInt index;
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RGBA_Font_Glyph *fg;
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int chr;
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int gl;
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chr = 0;
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if (!text[0]) return 0;
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gl = evas_common_font_utf8_get_next((unsigned char *)text, &chr);
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if (gl == 0) return 0;
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evas_common_font_size_use(fn);
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index = FT_Get_Char_Index(fn->src->ft.face, gl);
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fg = evas_common_font_cache_glyph_get(fn, index);
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if (!fg) return 0;
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return fg->glyph_out->left;
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}
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/* h & v advance */
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void
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evas_common_font_query_advance(RGBA_Font *fn, const char *text, int *h_adv, int *v_adv)
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{
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int use_kerning;
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int pen_x, pen_y;
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int start_x;
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int chr;
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FT_UInt prev_index;
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start_x = 0;
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pen_x = 0;
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pen_y = 0;
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evas_common_font_size_use(fn);
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use_kerning = FT_HAS_KERNING(fn->src->ft.face);
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prev_index = 0;
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for (chr = 0; text[chr];)
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{
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FT_UInt index;
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RGBA_Font_Glyph *fg;
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int chr_x, chr_y, chr_w;
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int gl;
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gl = evas_common_font_utf8_get_next((unsigned char *)text, &chr);
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if (gl == 0) break;
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index = FT_Get_Char_Index(fn->src->ft.face, gl);
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if ((use_kerning) && (prev_index) && (index))
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{
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FT_Vector delta;
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FT_Get_Kerning(fn->src->ft.face, prev_index, index,
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ft_kerning_default, &delta);
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pen_x += delta.x << 2;
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}
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fg = evas_common_font_cache_glyph_get(fn, index);
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if (!fg) continue;
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chr_x = (pen_x >> 8) + fg->glyph_out->left;
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chr_y = (pen_y >> 8) + fg->glyph_out->top;
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chr_w = fg->glyph_out->bitmap.width;
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pen_x += fg->glyph->advance.x >> 8;
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prev_index = index;
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}
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if (v_adv) *v_adv = evas_common_font_get_line_advance(fn);
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if (h_adv) *h_adv = (pen_x >> 8) - start_x;
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}
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/* x y w h for char at char pos */
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int
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evas_common_font_query_char_coords(RGBA_Font *fn, const char *text, int pos, int *cx, int *cy, int *cw, int *ch)
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{
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int use_kerning;
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int pen_x, pen_y;
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int prev_chr_end;
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int chr;
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int asc, desc;
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FT_UInt prev_index;
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pen_x = 0;
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pen_y = 0;
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evas_common_font_size_use(fn);
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use_kerning = FT_HAS_KERNING(fn->src->ft.face);
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prev_index = 0;
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prev_chr_end = 0;
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asc = evas_common_font_max_ascent_get(fn);
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desc = evas_common_font_max_descent_get(fn);
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for (chr = 0; text[chr];)
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{
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int pchr;
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FT_UInt index;
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RGBA_Font_Glyph *fg;
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int chr_x, chr_y, chr_w;
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int gl, kern;
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FT_Vector delta;
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pchr = chr;
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gl = evas_common_font_utf8_get_next((unsigned char *)text, &chr);
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if (gl == 0) break;
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index = FT_Get_Char_Index(fn->src->ft.face, gl);
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kern = 0;
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if ((use_kerning) && (prev_index) && (index))
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{
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FT_Get_Kerning(fn->src->ft.face, prev_index, index,
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ft_kerning_default, &delta);
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kern = delta.x << 2;
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pen_x += kern;
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}
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fg = evas_common_font_cache_glyph_get(fn, index);
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if (!fg) continue;
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if (kern < 0) kern = 0;
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chr_x = ((pen_x - kern) >> 8) + fg->glyph_out->left;
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chr_y = (pen_y >> 8) + fg->glyph_out->top;
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chr_w = fg->glyph_out->bitmap.width + (kern >> 8);
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if (text[chr])
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{
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int advw;
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advw = ((fg->glyph->advance.x + (kern << 8)) >> 16);
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if (chr_w < advw) chr_w = advw;
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}
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if (chr_x > prev_chr_end)
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{
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chr_w += (chr_x - prev_chr_end);
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chr_x = prev_chr_end;
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}
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if (pchr == pos)
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{
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if (cx) *cx = chr_x;
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if (cy) *cy = -asc;
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if (cw) *cw = chr_w;
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if (ch) *ch = asc + desc;
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return 1;
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}
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prev_chr_end = chr_x + chr_w;
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pen_x += fg->glyph->advance.x >> 8;
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prev_index = index;
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}
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return 0;
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}
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/* char pos of text at xy pos */
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int
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evas_common_font_query_text_at_pos(RGBA_Font *fn, const char *text, int x, int y, int *cx, int *cy, int *cw, int *ch)
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{
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int use_kerning;
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int pen_x, pen_y;
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int prev_chr_end;
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int chr;
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int asc, desc;
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FT_UInt prev_index;
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pen_x = 0;
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pen_y = 0;
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evas_common_font_size_use(fn);
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use_kerning = FT_HAS_KERNING(fn->src->ft.face);
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prev_index = 0;
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prev_chr_end = 0;
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asc = evas_common_font_max_ascent_get(fn);
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desc = evas_common_font_max_descent_get(fn);
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for (chr = 0; text[chr];)
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{
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int pchr;
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FT_UInt index;
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RGBA_Font_Glyph *fg;
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int chr_x, chr_y, chr_w;
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int gl, kern;
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FT_Vector delta;
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pchr = chr;
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gl = evas_common_font_utf8_get_next((unsigned char *)text, &chr);
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if (gl == 0) break;
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index = FT_Get_Char_Index(fn->src->ft.face, gl);
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kern = 0;
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if ((use_kerning) && (prev_index) && (index))
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{
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FT_Get_Kerning(fn->src->ft.face, prev_index, index,
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ft_kerning_default, &delta);
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kern = delta.x << 2;
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pen_x += kern;
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}
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fg = evas_common_font_cache_glyph_get(fn, index);
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if (!fg) continue;
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if (kern < 0) kern = 0;
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chr_x = ((pen_x - kern) >> 8) + fg->glyph_out->left;
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chr_y = (pen_y >> 8) + fg->glyph_out->top;
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chr_w = fg->glyph_out->bitmap.width + (kern >> 8);
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if (text[chr])
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{
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int advw;
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advw = ((fg->glyph->advance.x + (kern << 8)) >> 16);
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if (chr_w < advw) chr_w = advw;
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}
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if (chr_x > prev_chr_end)
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{
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chr_w += (chr_x - prev_chr_end);
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chr_x = prev_chr_end;
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}
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if ((x >= chr_x) && (x <= (chr_x + chr_w)) &&
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(y > -asc) && (y < desc))
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{
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if (cx) *cx = chr_x;
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if (cy) *cy = -asc;
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if (cw) *cw = chr_w;
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if (ch) *ch = asc + desc;
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return pchr;
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}
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prev_chr_end = chr_x + chr_w;
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pen_x += fg->glyph->advance.x >> 8;
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prev_index = index;
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}
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return -1;
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}
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