efb210469d
This is part of the TSM library creation. We also rename "console" to "screen" as this layer actually manages the screen. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/*
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* kmscon - Bit-Blitting Text Renderer Backend
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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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* SECTION:text_bblit.c
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* @short_description: Bit-Blitting Text Renderer Backend
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* @include: text.h
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*
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* The bit-blitting renderer requires framebuffer access to the output device
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* and simply blits the glyphs into the buffer.
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*/
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#include <errno.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "log.h"
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#include "text.h"
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#include "uterm.h"
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#define LOG_SUBSYSTEM "text_bblit"
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static int bblit_set(struct kmscon_text *txt)
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{
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unsigned int sw, sh, fw, fh;
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fw = txt->font->attr.width;
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fh = txt->font->attr.height;
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sw = uterm_screen_width(txt->screen);
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sh = uterm_screen_height(txt->screen);
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txt->cols = sw / fw;
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txt->rows = sh / fh;
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return 0;
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}
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static int bblit_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 tsm_screen_attr *attr)
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{
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const struct kmscon_glyph *glyph;
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int ret;
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if (!len) {
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ret = kmscon_font_render_empty(txt->font, &glyph);
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} else {
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ret = kmscon_font_render(txt->font, id, ch, len, &glyph);
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}
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if (ret) {
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ret = kmscon_font_render_inval(txt->font, &glyph);
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if (ret)
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return ret;
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}
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/* draw glyph */
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if (attr->inverse) {
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ret = uterm_screen_blend(txt->screen, &glyph->buf,
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posx * txt->font->attr.width,
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posy * txt->font->attr.height,
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attr->br, attr->bg, attr->bb,
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attr->fr, attr->fg, attr->fb);
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} else {
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ret = uterm_screen_blend(txt->screen, &glyph->buf,
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posx * txt->font->attr.width,
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posy * txt->font->attr.height,
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attr->fr, attr->fg, attr->fb,
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attr->br, attr->bg, attr->bb);
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}
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return ret;
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}
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static const struct kmscon_text_ops kmscon_text_bblit_ops = {
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.name = "bblit",
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.init = NULL,
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.destroy = NULL,
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.set = bblit_set,
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.unset = NULL,
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.prepare = NULL,
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.draw = bblit_draw,
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.render = NULL,
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.abort = NULL,
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};
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int kmscon_text_bblit_load(void)
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{
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int ret;
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ret = kmscon_text_register(&kmscon_text_bblit_ops);
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if (ret) {
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log_error("cannot register bblit renderer");
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return ret;
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}
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return 0;
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}
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void kmscon_text_bblit_unload(void)
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{
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kmscon_text_unregister(kmscon_text_bblit_ops.name);
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}
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