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.
43 #include "tsm_screen.h"
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;
79 struct shl_register_record *record;
80 const struct kmscon_font_ops *ops;
81 struct kmscon_font_attr attr;
82 unsigned int baseline;
86 struct kmscon_font_ops {
88 int (*init) (struct kmscon_font *out,
89 const struct kmscon_font_attr *attr);
90 void (*destroy) (struct kmscon_font *font);
91 int (*render) (struct kmscon_font *font,
92 uint32_t id, const uint32_t *ch, size_t len,
93 const struct kmscon_glyph **out);
94 int (*render_empty) (struct kmscon_font *font,
95 const struct kmscon_glyph **out);
96 int (*render_inval) (struct kmscon_font *font,
97 const struct kmscon_glyph **out);
100 int kmscon_font_register(const struct kmscon_font_ops *ops);
101 void kmscon_font_unregister(const char *name);
103 int kmscon_font_find(struct kmscon_font **out,
104 const struct kmscon_font_attr *attr,
105 const char *backend);
106 void kmscon_font_ref(struct kmscon_font *font);
107 void kmscon_font_unref(struct kmscon_font *font);
109 int kmscon_font_render(struct kmscon_font *font,
110 uint32_t id, const uint32_t *ch, size_t len,
111 const struct kmscon_glyph **out);
112 int kmscon_font_render_empty(struct kmscon_font *font,
113 const struct kmscon_glyph **out);
114 int kmscon_font_render_inval(struct kmscon_font *font,
115 const struct kmscon_glyph **out);
120 struct kmscon_text_ops;
124 struct shl_register_record *record;
125 const struct kmscon_text_ops *ops;
128 struct kmscon_font *font;
129 struct kmscon_font *bold_font;
130 struct uterm_display *disp;
136 struct kmscon_text_ops {
138 int (*init) (struct kmscon_text *txt);
139 void (*destroy) (struct kmscon_text *txt);
140 int (*set) (struct kmscon_text *txt);
141 void (*unset) (struct kmscon_text *txt);
142 int (*prepare) (struct kmscon_text *txt);
143 int (*draw) (struct kmscon_text *txt,
144 uint32_t id, const uint32_t *ch, size_t len,
146 unsigned int posx, unsigned int posy,
147 const struct tsm_screen_attr *attr);
148 int (*render) (struct kmscon_text *txt);
149 void (*abort) (struct kmscon_text *txt);
152 int kmscon_text_register(const struct kmscon_text_ops *ops);
153 void kmscon_text_unregister(const char *name);
155 int kmscon_text_new(struct kmscon_text **out, const char *backend);
156 void kmscon_text_ref(struct kmscon_text *txt);
157 void kmscon_text_unref(struct kmscon_text *txt);
159 int kmscon_text_set(struct kmscon_text *txt,
160 struct kmscon_font *font,
161 struct kmscon_font *bold_font,
162 struct uterm_display *disp);
163 void kmscon_text_unset(struct kmscon_text *txt);
164 unsigned int kmscon_text_get_cols(struct kmscon_text *txt);
165 unsigned int kmscon_text_get_rows(struct kmscon_text *txt);
167 int kmscon_text_prepare(struct kmscon_text *txt);
168 int kmscon_text_draw(struct kmscon_text *txt,
169 uint32_t id, const uint32_t *ch, size_t len,
171 unsigned int posx, unsigned int posy,
172 const struct tsm_screen_attr *attr);
173 int kmscon_text_render(struct kmscon_text *txt);
174 void kmscon_text_abort(struct kmscon_text *txt);
176 int kmscon_text_prepare_cb(struct tsm_screen *con, void *data);
177 int kmscon_text_draw_cb(struct tsm_screen *con,
178 uint32_t id, const uint32_t *ch, size_t len,
180 unsigned int posx, unsigned int posy,
181 const struct tsm_screen_attr *attr, void *data);
182 int kmscon_text_render_cb(struct tsm_screen *con, void *data);
184 /* modularized backends */
186 int kmscon_font_8x16_load(void);
187 void kmscon_font_8x16_unload(void);
189 #ifdef BUILD_ENABLE_FONT_UNIFONT
191 int kmscon_font_unifont_load(void);
192 void kmscon_font_unifont_unload(void);
196 static inline int kmscon_font_unifont_load(void)
201 static inline void kmscon_font_unifont_unload(void)
207 #ifdef BUILD_ENABLE_FONT_FREETYPE2
209 int kmscon_font_freetype2_load(void);
210 void kmscon_font_freetype2_unload(void);
214 static inline int kmscon_font_freetype2_load(void)
219 static inline void kmscon_font_freetype2_unload(void)
225 #ifdef BUILD_ENABLE_FONT_PANGO
227 int kmscon_font_pango_load(void);
228 void kmscon_font_pango_unload(void);
232 static inline int kmscon_font_pango_load(void)
237 static inline void kmscon_font_pango_unload(void)
243 #ifdef BUILD_ENABLE_RENDERER_BBLIT
245 int kmscon_text_bblit_load(void);
246 void kmscon_text_bblit_unload(void);
250 static inline int kmscon_text_bblit_load(void)
255 static inline void kmscon_text_bblit_unload(void)
261 #ifdef BUILD_ENABLE_RENDERER_BBULK
263 int kmscon_text_bbulk_load(void);
264 void kmscon_text_bbulk_unload(void);
268 static inline int kmscon_text_bbulk_load(void)
273 static inline void kmscon_text_bbulk_unload(void)
279 #ifdef BUILD_ENABLE_RENDERER_GLTEX
281 int kmscon_text_gltex_load(void);
282 void kmscon_text_gltex_unload(void);
286 static inline int kmscon_text_gltex_load(void)
291 static inline void kmscon_text_gltex_unload(void)
297 static inline void kmscon_font_load_all(void)
299 kmscon_font_8x16_load();
300 kmscon_font_unifont_load();
301 kmscon_font_pango_load();
302 kmscon_font_freetype2_load();
305 static inline void kmscon_font_unload_all(void)
307 kmscon_font_freetype2_unload();
308 kmscon_font_pango_unload();
309 kmscon_font_unifont_unload();
310 kmscon_font_8x16_unload();
313 static inline void kmscon_text_load_all(void)
315 kmscon_text_bbulk_load();
316 kmscon_text_bblit_load();
317 kmscon_text_gltex_load();
320 static inline void kmscon_text_unload_all(void)
322 kmscon_text_gltex_unload();
323 kmscon_text_bblit_unload();
324 kmscon_text_bbulk_unload();
327 #endif /* KMSCON_TEXT_H */