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/*
* kmscon - Font Renderer
*
* Copyright (c) 2012-2013 David Herrmann <dh.herrmann@googlemail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Font Renderer
*/
#ifndef KMSCON_FONT_H
#define KMSCON_FONT_H
#include <errno.h>
#include <stdlib.h>
#include "kmscon_module.h"
#include "uterm_video.h"
/* fonts */
struct kmscon_font_attr;
struct kmscon_glyph;
struct kmscon_font;
struct kmscon_font_ops;
#define KMSCON_FONT_MAX_NAME 128
#define KMSCON_FONT_DEFAULT_NAME "monospace"
#define KMSCON_FONT_DEFAULT_PPI 72
struct kmscon_font_attr {
char name[KMSCON_FONT_MAX_NAME];
unsigned int ppi;
unsigned int points;
bool bold;
bool italic;
unsigned int height;
unsigned int width;
};
void kmscon_font_attr_normalize(struct kmscon_font_attr *attr);
bool kmscon_font_attr_match(const struct kmscon_font_attr *a1,
const struct kmscon_font_attr *a2);
struct kmscon_glyph {
struct uterm_video_buffer buf;
unsigned int width;
void *data;
};
struct kmscon_font {
unsigned long ref;
struct shl_register_record *record;
const struct kmscon_font_ops *ops;
struct kmscon_font_attr attr;
unsigned int baseline;
void *data;
};
struct kmscon_font_ops {
const char *name;
struct kmscon_module *owner;
int (*init) (struct kmscon_font *out,
const struct kmscon_font_attr *attr);
void (*destroy) (struct kmscon_font *font);
int (*render) (struct kmscon_font *font,
uint32_t id, const uint32_t *ch, size_t len,
const struct kmscon_glyph **out);
int (*render_empty) (struct kmscon_font *font,
const struct kmscon_glyph **out);
int (*render_inval) (struct kmscon_font *font,
const struct kmscon_glyph **out);
};
int kmscon_font_register(const struct kmscon_font_ops *ops);
void kmscon_font_unregister(const char *name);
int kmscon_font_find(struct kmscon_font **out,
const struct kmscon_font_attr *attr,
const char *backend);
void kmscon_font_ref(struct kmscon_font *font);
void kmscon_font_unref(struct kmscon_font *font);
int kmscon_font_render(struct kmscon_font *font,
uint32_t id, const uint32_t *ch, size_t len,
const struct kmscon_glyph **out);
int kmscon_font_render_empty(struct kmscon_font *font,
const struct kmscon_glyph **out);
int kmscon_font_render_inval(struct kmscon_font *font,
const struct kmscon_glyph **out);
/* modularized backends */
extern struct kmscon_font_ops kmscon_font_8x16_ops;
extern struct kmscon_font_ops kmscon_font_unifont_ops;
extern struct kmscon_font_ops kmscon_font_freetype2_ops;
extern struct kmscon_font_ops kmscon_font_pango_ops;
#endif /* KMSCON_FONT_H */
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