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https://github.com/kovidgoyal/kitty.git
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a92b3c605f
This means that more text attributes can be added in the future (there are 8 bits available) and there is no need to keep bit twiddling when accessing the chars themselves. Also means less data needs to be sent to the GPU. Cell size does not change since there were currently 2 unused bytes because of alignment.
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*
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* rewrap.h
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* Copyright (C) 2016 Kovid Goyal <kovid at kovidgoyal.net>
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*
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* Distributed under terms of the GPL3 license.
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*/
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#pragma once
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#ifndef BufType
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#define BufType LineBuf
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#endif
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#ifndef init_src_line
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#define init_src_line(src_y) init_line(src, src->line, src->line_map[src_y]);
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#endif
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#ifndef init_dest_line
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#define init_dest_line(dest_y) init_line(dest, dest->line, dest->line_map[dest_y]);
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#endif
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#ifndef first_dest_line
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#define first_dest_line init_dest_line(0)
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#endif
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#ifndef next_dest_line
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#define next_dest_line(continued) \
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if (dest_y >= dest->ynum - 1) { \
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linebuf_index(dest, 0, dest->ynum - 1); \
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if (historybuf != NULL) { \
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linebuf_init_line(dest, dest->ynum - 1); \
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historybuf_add_line(historybuf, dest->line); \
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}\
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linebuf_clear_line(dest, dest->ynum - 1); \
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} else dest_y++; \
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init_dest_line(dest_y); \
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dest->continued_map[dest_y] = continued;
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#endif
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#ifndef is_src_line_continued
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#define is_src_line_continued(src_y) (src_y < src->ynum - 1 ? src->continued_map[src_y + 1] : false)
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#endif
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static inline void
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copy_range(Line *src, index_type src_at, Line* dest, index_type dest_at, index_type num) {
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memcpy(dest->cells + dest_at, src->cells + src_at, num * sizeof(Cell));
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}
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static void
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rewrap_inner(BufType *src, BufType *dest, const index_type src_limit, HistoryBuf UNUSED *historybuf) {
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bool src_line_is_continued = false;
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index_type src_y = 0, src_x = 0, dest_x = 0, dest_y = 0, num = 0, src_x_limit = 0;
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first_dest_line;
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do {
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init_src_line(src_y);
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src_line_is_continued = is_src_line_continued(src_y);
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src_x_limit = src->xnum;
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if (!src_line_is_continued) {
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// Trim trailing blanks since there is a hard line break at the end of this line
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while(src_x_limit && (src->line->cells[src_x_limit - 1].ch) == BLANK_CHAR) src_x_limit--;
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}
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while (src_x < src_x_limit) {
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if (dest_x >= dest->xnum) { next_dest_line(true); dest_x = 0; }
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num = MIN(src->line->xnum - src_x, dest->xnum - dest_x);
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copy_range(src->line, src_x, dest->line, dest_x, num);
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src_x += num; dest_x += num;
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}
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src_y++; src_x = 0;
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if (!src_line_is_continued && src_y < src_limit) { next_dest_line(false); dest_x = 0; }
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} while (src_y < src_limit);
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dest->line->ynum = dest_y;
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}
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