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/*
* kmscon - Bit-Blitting Text Renderer Backend
*
* Copyright (c) 2012 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.
*/
/**
* SECTION:text_bblit.c
* @short_description: Bit-Blitting Text Renderer Backend
* @include: text.h
*
* The bit-blitting renderer requires framebuffer access to the output device
* and simply blits the glyphs into the buffer.
*/
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include "log.h"
#include "text.h"
#include "uterm.h"
#define LOG_SUBSYSTEM "text_bblit"
static int bblit_set(struct kmscon_text *txt)
{
unsigned int sw, sh, fw, fh;
fw = txt->font->attr.width;
fh = txt->font->attr.height;
sw = uterm_screen_width(txt->screen);
sh = uterm_screen_height(txt->screen);
txt->cols = sw / fw;
txt->rows = sh / fh;
return 0;
}
static int bblit_draw(struct kmscon_text *txt,
uint32_t id, const uint32_t *ch, size_t len,
unsigned int posx, unsigned int posy,
const struct tsm_screen_attr *attr)
{
const struct kmscon_glyph *glyph;
int ret;
if (!len) {
ret = kmscon_font_render_empty(txt->font, &glyph);
} else {
ret = kmscon_font_render(txt->font, id, ch, len, &glyph);
}
if (ret) {
ret = kmscon_font_render_inval(txt->font, &glyph);
if (ret)
return ret;
}
/* draw glyph */
if (attr->inverse) {
ret = uterm_screen_blend(txt->screen, &glyph->buf,
posx * txt->font->attr.width,
posy * txt->font->attr.height,
attr->br, attr->bg, attr->bb,
attr->fr, attr->fg, attr->fb);
} else {
ret = uterm_screen_blend(txt->screen, &glyph->buf,
posx * txt->font->attr.width,
posy * txt->font->attr.height,
attr->fr, attr->fg, attr->fb,
attr->br, attr->bg, attr->bb);
}
return ret;
}
static const struct kmscon_text_ops kmscon_text_bblit_ops = {
.name = "bblit",
.init = NULL,
.destroy = NULL,
.set = bblit_set,
.unset = NULL,
.prepare = NULL,
.draw = bblit_draw,
.render = NULL,
.abort = NULL,
};
int kmscon_text_bblit_load(void)
{
int ret;
ret = kmscon_text_register(&kmscon_text_bblit_ops);
if (ret) {
log_error("cannot register bblit renderer");
return ret;
}
return 0;
}
void kmscon_text_bblit_unload(void)
{
kmscon_text_unregister(kmscon_text_bblit_ops.name);
}
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