2 * kmscon - Text Renderer
4 * Copyright (c) 2012 David Herrmann <dh.herrmann@googlemail.com>
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files
8 * (the "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
21 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * The Text-Renderer subsystem provides a simple way to draw text into a
29 * framebuffer. The system is modular and several different backends are
30 * available that can be used.
31 * The system is split into:
32 * - Font renderer: The font renderer allows selecting fonts and rendering
33 * single glyphs into memory-buffers
34 * - Text renderer: The text renderer uses the font renderer to draw a whole
35 * console into a framebuffer.
48 struct kmscon_font_attr;
51 struct kmscon_font_ops;
53 #define KMSCON_FONT_MAX_NAME 128
54 #define KMSCON_FONT_DEFAULT_NAME "monospace"
55 #define KMSCON_FONT_DEFAULT_PPI 72
57 struct kmscon_font_attr {
58 char name[KMSCON_FONT_MAX_NAME];
67 void kmscon_font_attr_normalize(struct kmscon_font_attr *attr);
68 bool kmscon_font_attr_match(const struct kmscon_font_attr *a1,
69 const struct kmscon_font_attr *a2);
72 struct uterm_video_buffer buf;
78 const struct kmscon_font_ops *ops;
79 struct kmscon_font_attr attr;
80 unsigned int baseline;
84 struct kmscon_font_ops {
86 int (*init) (struct kmscon_font *out,
87 const struct kmscon_font_attr *attr);
88 void (*destroy) (struct kmscon_font *font);
89 int (*render) (struct kmscon_font *font, kmscon_symbol_t sym,
90 const struct kmscon_glyph **out);
91 int (*render_empty) (struct kmscon_font *font,
92 const struct kmscon_glyph **out);
93 int (*render_inval) (struct kmscon_font *font,
94 const struct kmscon_glyph **out);
97 int kmscon_font_register(const struct kmscon_font_ops *ops);
98 void kmscon_font_unregister(const char *name);
100 int kmscon_font_find(struct kmscon_font **out,
101 const struct kmscon_font_attr *attr,
102 const char *backend);
103 void kmscon_font_ref(struct kmscon_font *font);
104 void kmscon_font_unref(struct kmscon_font *font);
106 int kmscon_font_render(struct kmscon_font *font, kmscon_symbol_t sym,
107 const struct kmscon_glyph **out);
108 int kmscon_font_render_empty(struct kmscon_font *font,
109 const struct kmscon_glyph **out);
110 int kmscon_font_render_inval(struct kmscon_font *font,
111 const struct kmscon_glyph **out);
116 struct kmscon_text_ops;
120 const struct kmscon_text_ops *ops;
121 struct kmscon_font *font;
122 struct uterm_screen *screen;
132 struct kmscon_text_ops {
134 int (*init) (struct kmscon_text *txt);
135 void (*destroy) (struct kmscon_text *txt);
136 void (*new_font) (struct kmscon_text *txt);
137 void (*new_bgcolor) (struct kmscon_text *txt);
138 void (*new_screen) (struct kmscon_text *txt);
139 void (*prepare) (struct kmscon_text *txt);
140 void (*draw) (struct kmscon_text *txt, kmscon_symbol_t ch,
141 unsigned int posx, unsigned int posy,
142 const struct font_char_attr *attr);
143 void (*render) (struct kmscon_text *txt);
146 int kmscon_text_register(const struct kmscon_text_ops *ops);
147 void kmscon_text_unregister(const char *name);
149 int kmscon_text_new(struct kmscon_text **out, const char *backend);
150 void kmscon_text_ref(struct kmscon_text *txt);
151 void kmscon_text_unref(struct kmscon_text *txt);
153 void kmscon_text_set_font(struct kmscon_text *txt,
154 struct kmscon_font *font);
155 void kmscon_text_set_bgcolor(struct kmscon_text *txt,
156 uint8_t r, uint8_t g, uint8_t b);
157 void kmscon_text_set_screen(struct kmscon_text *txt,
158 struct uterm_screen *screen);
159 unsigned int kmscon_text_get_cols(struct kmscon_text *txt);
160 unsigned int kmscon_text_get_rows(struct kmscon_text *txt);
162 void kmscon_text_prepare(struct kmscon_text *txt);
163 void kmscon_text_draw(struct kmscon_text *txt, kmscon_symbol_t ch,
164 unsigned int posx, unsigned int posy,
165 const struct font_char_attr *attr);
166 void kmscon_text_render(struct kmscon_text *txt);
168 /* modularized backends */
170 #ifdef KMSCON_HAVE_8X16
172 int kmscon_font_8x16_load(void);
173 void kmscon_font_8x16_unload(void);
177 static inline int kmscon_font_8x16_load(void)
182 static inline void kmscon_font_8x16_unload(void)
188 #ifdef KMSCON_HAVE_FREETYPE2
190 int kmscon_font_freetype2_load(void);
191 void kmscon_font_freetype2_unload(void);
195 static inline int kmscon_font_freetype2_load(void)
200 static inline void kmscon_font_freetype2_unload(void)
206 #ifdef KMSCON_HAVE_PANGO
208 int kmscon_font_pango_load(void);
209 void kmscon_font_pango_unload(void);
213 static inline int kmscon_font_pango_load(void)
218 static inline void kmscon_font_pango_unload(void)
224 int kmscon_text_bblit_load(void);
225 void kmscon_text_bblit_unload(void);
227 #endif /* KMSCON_TEXT_H */