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/*
* kmscon - Text 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.
*/
/*
* Text Renderer
* The Text-Renderer subsystem provides a simple way to draw text into a
* framebuffer. The system is modular and several different backends are
* available that can be used.
*/
#ifndef KMSCON_TEXT_H
#define KMSCON_TEXT_H
#include <errno.h>
#include <stdlib.h>
#include "font.h"
#include "kmscon_module.h"
#include "tsm_screen.h"
#include "uterm_video.h"
/* text renderer */
struct kmscon_text;
struct kmscon_text_ops;
struct kmscon_text {
unsigned long ref;
struct shl_register_record *record;
const struct kmscon_text_ops *ops;
void *data;
struct kmscon_font *font;
struct kmscon_font *bold_font;
struct uterm_display *disp;
unsigned int cols;
unsigned int rows;
bool rendering;
};
struct kmscon_text_ops {
const char *name;
struct kmscon_module *owner;
int (*init) (struct kmscon_text *txt);
void (*destroy) (struct kmscon_text *txt);
int (*set) (struct kmscon_text *txt);
void (*unset) (struct kmscon_text *txt);
int (*prepare) (struct kmscon_text *txt);
int (*draw) (struct kmscon_text *txt,
uint32_t id, const uint32_t *ch, size_t len,
unsigned int width,
unsigned int posx, unsigned int posy,
const struct tsm_screen_attr *attr);
int (*render) (struct kmscon_text *txt);
void (*abort) (struct kmscon_text *txt);
};
int kmscon_text_register(const struct kmscon_text_ops *ops);
void kmscon_text_unregister(const char *name);
int kmscon_text_new(struct kmscon_text **out, const char *backend);
void kmscon_text_ref(struct kmscon_text *txt);
void kmscon_text_unref(struct kmscon_text *txt);
int kmscon_text_set(struct kmscon_text *txt,
struct kmscon_font *font,
struct kmscon_font *bold_font,
struct uterm_display *disp);
void kmscon_text_unset(struct kmscon_text *txt);
unsigned int kmscon_text_get_cols(struct kmscon_text *txt);
unsigned int kmscon_text_get_rows(struct kmscon_text *txt);
int kmscon_text_prepare(struct kmscon_text *txt);
int kmscon_text_draw(struct kmscon_text *txt,
uint32_t id, const uint32_t *ch, size_t len,
unsigned int width,
unsigned int posx, unsigned int posy,
const struct tsm_screen_attr *attr);
int kmscon_text_render(struct kmscon_text *txt);
void kmscon_text_abort(struct kmscon_text *txt);
int kmscon_text_prepare_cb(struct tsm_screen *con, void *data);
int kmscon_text_draw_cb(struct tsm_screen *con,
uint32_t id, const uint32_t *ch, size_t len,
unsigned int width,
unsigned int posx, unsigned int posy,
const struct tsm_screen_attr *attr, void *data);
int kmscon_text_render_cb(struct tsm_screen *con, void *data);
/* modularized backends */
extern struct kmscon_text_ops kmscon_text_bblit_ops;
extern struct kmscon_text_ops kmscon_text_bbulk_ops;
extern struct kmscon_text_ops kmscon_text_gltex_ops;
#endif /* KMSCON_TEXT_H */
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