f2c1dd77ff
Instead of converting symbols into UCS4 string in each backend, we now pass the whole data from the console layer into the renderers. This makes all renderers indepedent of any recently introduced symbol-tables and they can be implemented inside of TSM without exporting them. However, we still need to pass the IDs to the text layer. The text layer must not use them for anything but identification. Moreover, it must never assume that they are valid tsm_symbol_t values. We do this so the backends can still have fast hashtable lookups rather than allocating big keys containing the UCS4 string+length and using these for lookups. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
306 lines
7.3 KiB
C
306 lines
7.3 KiB
C
/*
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* kmscon - Text Renderer
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*
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* Copyright (c) 2012 David Herrmann <dh.herrmann@googlemail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Text Renderer
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* The Text-Renderer subsystem provides a simple way to draw text into a
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* framebuffer. The system is modular and several different backends are
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* available that can be used.
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* The system is split into:
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* - Font renderer: The font renderer allows selecting fonts and rendering
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* single glyphs into memory-buffers
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* - Text renderer: The text renderer uses the font renderer to draw a whole
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* console into a framebuffer.
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*/
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#ifndef KMSCON_TEXT_H
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#define KMSCON_TEXT_H
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#include <errno.h>
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#include <stdlib.h>
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#include "console.h"
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#include "uterm.h"
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/* fonts */
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struct kmscon_font_attr;
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struct kmscon_glyph;
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struct kmscon_font;
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struct kmscon_font_ops;
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#define KMSCON_FONT_MAX_NAME 128
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#define KMSCON_FONT_DEFAULT_NAME "monospace"
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#define KMSCON_FONT_DEFAULT_PPI 72
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struct kmscon_font_attr {
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char name[KMSCON_FONT_MAX_NAME];
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unsigned int ppi;
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unsigned int points;
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bool bold;
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bool italic;
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unsigned int height;
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unsigned int width;
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};
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void kmscon_font_attr_normalize(struct kmscon_font_attr *attr);
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bool kmscon_font_attr_match(const struct kmscon_font_attr *a1,
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const struct kmscon_font_attr *a2);
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struct kmscon_glyph {
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struct uterm_video_buffer buf;
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void *data;
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};
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struct kmscon_font {
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unsigned long ref;
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const struct kmscon_font_ops *ops;
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struct kmscon_font_attr attr;
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unsigned int baseline;
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void *data;
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};
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struct kmscon_font_ops {
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const char *name;
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int (*init) (struct kmscon_font *out,
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const struct kmscon_font_attr *attr);
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void (*destroy) (struct kmscon_font *font);
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int (*render) (struct kmscon_font *font,
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uint32_t id, const uint32_t *ch, size_t len,
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const struct kmscon_glyph **out);
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int (*render_empty) (struct kmscon_font *font,
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const struct kmscon_glyph **out);
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int (*render_inval) (struct kmscon_font *font,
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const struct kmscon_glyph **out);
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};
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int kmscon_font_register(const struct kmscon_font_ops *ops);
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void kmscon_font_unregister(const char *name);
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int kmscon_font_find(struct kmscon_font **out,
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const struct kmscon_font_attr *attr,
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const char *backend);
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void kmscon_font_ref(struct kmscon_font *font);
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void kmscon_font_unref(struct kmscon_font *font);
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int kmscon_font_render(struct kmscon_font *font,
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uint32_t id, const uint32_t *ch, size_t len,
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const struct kmscon_glyph **out);
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int kmscon_font_render_empty(struct kmscon_font *font,
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const struct kmscon_glyph **out);
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int kmscon_font_render_inval(struct kmscon_font *font,
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const struct kmscon_glyph **out);
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/* text renderer */
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struct kmscon_text;
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struct kmscon_text_ops;
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struct kmscon_text {
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unsigned long ref;
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const struct kmscon_text_ops *ops;
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void *data;
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struct kmscon_font *font;
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struct uterm_screen *screen;
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unsigned int cols;
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unsigned int rows;
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bool rendering;
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};
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struct kmscon_text_ops {
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const char *name;
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int (*init) (struct kmscon_text *txt);
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void (*destroy) (struct kmscon_text *txt);
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int (*set) (struct kmscon_text *txt);
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void (*unset) (struct kmscon_text *txt);
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int (*prepare) (struct kmscon_text *txt);
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int (*draw) (struct kmscon_text *txt,
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uint32_t id, const uint32_t *ch, size_t len,
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unsigned int posx, unsigned int posy,
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const struct kmscon_console_attr *attr);
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int (*render) (struct kmscon_text *txt);
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void (*abort) (struct kmscon_text *txt);
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};
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int kmscon_text_register(const struct kmscon_text_ops *ops);
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void kmscon_text_unregister(const char *name);
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int kmscon_text_new(struct kmscon_text **out, const char *backend);
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void kmscon_text_ref(struct kmscon_text *txt);
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void kmscon_text_unref(struct kmscon_text *txt);
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int kmscon_text_set(struct kmscon_text *txt,
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struct kmscon_font *font,
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struct uterm_screen *screen);
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void kmscon_text_unset(struct kmscon_text *txt);
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unsigned int kmscon_text_get_cols(struct kmscon_text *txt);
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unsigned int kmscon_text_get_rows(struct kmscon_text *txt);
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int kmscon_text_prepare(struct kmscon_text *txt);
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int kmscon_text_draw(struct kmscon_text *txt,
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uint32_t id, const uint32_t *ch, size_t len,
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unsigned int posx, unsigned int posy,
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const struct kmscon_console_attr *attr);
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int kmscon_text_render(struct kmscon_text *txt);
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void kmscon_text_abort(struct kmscon_text *txt);
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int kmscon_text_prepare_cb(struct kmscon_console *con, void *data);
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int kmscon_text_draw_cb(struct kmscon_console *con,
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uint32_t id, const uint32_t *ch, size_t len,
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unsigned int posx, unsigned int posy,
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const struct kmscon_console_attr *attr, void *data);
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int kmscon_text_render_cb(struct kmscon_console *con, void *data);
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/* modularized backends */
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#ifdef KMSCON_HAVE_UNIFONT
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int kmscon_font_unifont_load(void);
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void kmscon_font_unifont_unload(void);
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#else
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static inline int kmscon_font_unifont_load(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void kmscon_font_unifont_unload(void)
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{
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}
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#endif
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#ifdef KMSCON_HAVE_8X16
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int kmscon_font_8x16_load(void);
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void kmscon_font_8x16_unload(void);
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#else
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static inline int kmscon_font_8x16_load(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void kmscon_font_8x16_unload(void)
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{
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}
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#endif
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#ifdef KMSCON_HAVE_FREETYPE2
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int kmscon_font_freetype2_load(void);
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void kmscon_font_freetype2_unload(void);
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#else
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static inline int kmscon_font_freetype2_load(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void kmscon_font_freetype2_unload(void)
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{
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}
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#endif
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#ifdef KMSCON_HAVE_PANGO
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int kmscon_font_pango_load(void);
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void kmscon_font_pango_unload(void);
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#else
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static inline int kmscon_font_pango_load(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void kmscon_font_pango_unload(void)
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{
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}
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#endif
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#ifdef KMSCON_HAVE_BBLIT
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int kmscon_text_bblit_load(void);
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void kmscon_text_bblit_unload(void);
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#else
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static inline int kmscon_text_bblit_load(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void kmscon_text_bblit_unload(void)
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{
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}
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#endif
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#ifdef KMSCON_HAVE_BBULK
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int kmscon_text_bbulk_load(void);
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void kmscon_text_bbulk_unload(void);
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#else
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static inline int kmscon_text_bbulk_load(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void kmscon_text_bbulk_unload(void)
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{
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}
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#endif
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#ifdef KMSCON_HAVE_GLES2
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int kmscon_text_gltex_load(void);
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void kmscon_text_gltex_unload(void);
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#else
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static inline int kmscon_text_gltex_load(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void kmscon_text_gltex_unload(void)
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{
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}
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#endif
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#endif /* KMSCON_TEXT_H */
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