1 /**
2 * @file lv_font.c
3 *
4 */
5
6 /*********************
7 * INCLUDES
8 *********************/
9
10 #include "lv_font.h"
11 #include "../misc/lv_text_private.h"
12 #include "../misc/lv_utils.h"
13 #include "../misc/lv_log.h"
14 #include "../misc/lv_assert.h"
15 #include "../stdlib/lv_string.h"
16
17 /*********************
18 * DEFINES
19 *********************/
20
21 /**********************
22 * TYPEDEFS
23 **********************/
24
25 /**********************
26 * STATIC PROTOTYPES
27 **********************/
28
29 /**********************
30 * STATIC VARIABLES
31 **********************/
32
33 /**********************
34 * GLOBAL PROTOTYPES
35 **********************/
36
37 /**********************
38 * MACROS
39 **********************/
40
41 /**********************
42 * GLOBAL FUNCTIONS
43 **********************/
44
lv_font_get_glyph_bitmap(lv_font_glyph_dsc_t * g_dsc,lv_draw_buf_t * draw_buf)45 const void * lv_font_get_glyph_bitmap(lv_font_glyph_dsc_t * g_dsc, lv_draw_buf_t * draw_buf)
46 {
47 const lv_font_t * font_p = g_dsc->resolved_font;
48 LV_ASSERT_NULL(font_p);
49 return font_p->get_glyph_bitmap(g_dsc, draw_buf);
50 }
51
lv_font_glyph_release_draw_data(lv_font_glyph_dsc_t * g_dsc)52 void lv_font_glyph_release_draw_data(lv_font_glyph_dsc_t * g_dsc)
53 {
54 const lv_font_t * font = g_dsc->resolved_font;
55
56 if(font != NULL && font->release_glyph) {
57 font->release_glyph(font, g_dsc);
58 }
59 }
60
lv_font_get_glyph_dsc(const lv_font_t * font_p,lv_font_glyph_dsc_t * dsc_out,uint32_t letter,uint32_t letter_next)61 bool lv_font_get_glyph_dsc(const lv_font_t * font_p, lv_font_glyph_dsc_t * dsc_out, uint32_t letter,
62 uint32_t letter_next)
63 {
64
65 LV_ASSERT_NULL(font_p);
66 LV_ASSERT_NULL(dsc_out);
67
68 #if LV_USE_FONT_PLACEHOLDER
69 const lv_font_t * placeholder_font = NULL;
70 #endif
71
72 const lv_font_t * f = font_p;
73
74 dsc_out->resolved_font = NULL;
75 dsc_out->req_raw_bitmap = 0;
76
77 while(f) {
78 bool found = f->get_glyph_dsc(f, dsc_out, letter, f->kerning == LV_FONT_KERNING_NONE ? 0 : letter_next);
79 if(found) {
80 if(!dsc_out->is_placeholder) {
81 dsc_out->resolved_font = f;
82 return true;
83 }
84 #if LV_USE_FONT_PLACEHOLDER
85 else if(placeholder_font == NULL) {
86 placeholder_font = f;
87 }
88 #endif
89 }
90 f = f->fallback;
91 }
92
93 #if LV_USE_FONT_PLACEHOLDER
94 if(placeholder_font != NULL) {
95 placeholder_font->get_glyph_dsc(placeholder_font, dsc_out, letter,
96 placeholder_font->kerning == LV_FONT_KERNING_NONE ? 0 : letter_next);
97 dsc_out->resolved_font = placeholder_font;
98 return true;
99 }
100 #endif
101
102 #if LV_USE_FONT_PLACEHOLDER
103 dsc_out->box_w = font_p->line_height / 2;
104 dsc_out->adv_w = dsc_out->box_w + 2;
105 #else
106 dsc_out->box_w = 0;
107 dsc_out->adv_w = 0;
108 #endif
109
110 dsc_out->resolved_font = NULL;
111 dsc_out->box_h = font_p->line_height;
112 dsc_out->ofs_x = 0;
113 dsc_out->ofs_y = 0;
114 dsc_out->format = LV_FONT_GLYPH_FORMAT_A1;
115 dsc_out->is_placeholder = true;
116
117 return false;
118 }
119
lv_font_get_glyph_width(const lv_font_t * font,uint32_t letter,uint32_t letter_next)120 uint16_t lv_font_get_glyph_width(const lv_font_t * font, uint32_t letter, uint32_t letter_next)
121 {
122 LV_ASSERT_NULL(font);
123 lv_font_glyph_dsc_t g;
124
125 /*Return zero if letter is marker*/
126 if(lv_text_is_marker(letter)) return 0;
127
128 lv_font_get_glyph_dsc(font, &g, letter, letter_next);
129 return g.adv_w;
130 }
131
lv_font_set_kerning(lv_font_t * font,lv_font_kerning_t kerning)132 void lv_font_set_kerning(lv_font_t * font, lv_font_kerning_t kerning)
133 {
134 LV_ASSERT_NULL(font);
135 font->kerning = kerning;
136 }
137
lv_font_get_line_height(const lv_font_t * font)138 int32_t lv_font_get_line_height(const lv_font_t * font)
139 {
140 return font->line_height;
141 }
142
lv_font_default(void)143 const lv_font_t * lv_font_default(void)
144 {
145 return LV_FONT_DEFAULT;
146 }
147
148 /**********************
149 * STATIC FUNCTIONS
150 **********************/
151
