0d43751e88
We finally want to get rid of any dependencies in the vte/console layer so we can split it out into a separate library. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
302 lines
7.2 KiB
C
302 lines
7.2 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 "unicode.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, kmscon_symbol_t sym,
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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, kmscon_symbol_t sym,
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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, kmscon_symbol_t ch,
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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, kmscon_symbol_t ch,
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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, kmscon_symbol_t ch,
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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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