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foot/box-drawing.c
Daniel Eklöf e426e77b1d
box-drawing: braille: prefer increasing spacing over dot width 
Too large dots make them harder to distinguish, when the spacing
between them is small.

Prefer increasing the spacing, instead of increasing the dot
size. This looks better at small font sizes in particular.
2021-09-14 10:20:07 +02:00

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#include "box-drawing.h"
#include <stdio.h>
#include <errno.h>
#define LOG_MODULE "box-drawing"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "config.h"
#include "macros.h"
#include "stride.h"
#include "terminal.h"
#include "util.h"
#include "xmalloc.h"
enum thickness {
LIGHT,
HEAVY,
};
struct buf {
uint8_t *data;
pixman_image_t *pix;
pixman_format_code_t format;
int width;
int height;
int stride;
bool solid_shades;
int thickness[2];
/* For sextants and wedges */
int x_halfs[2];
int y_thirds[2];
};
static const pixman_color_t white = {0xffff, 0xffff, 0xffff, 0xffff};
static void
change_buffer_format(struct buf *buf, pixman_format_code_t new_format)
{
int stride = stride_for_format_and_width(new_format, buf->width);
uint8_t *new_data = xcalloc(buf->height * stride, 1);
pixman_image_t *new_pix = pixman_image_create_bits_no_clear(
new_format, buf->width, buf->height, (uint32_t *)new_data, stride);
if (new_pix == NULL) {
errno = ENOMEM;
perror(__func__);
abort();
}
pixman_image_unref(buf->pix);
free(buf->data);
buf->data = new_data;
buf->pix = new_pix;
buf->format = new_format;
buf->stride = stride;
}
static int NOINLINE
_thickness(int base_thickness, enum thickness thick)
{
int multiplier = thick * 2 + 1;
xassert(base_thickness >= 1);
xassert((thick == LIGHT && multiplier == 1) ||
(thick == HEAVY && multiplier == 3));
return base_thickness * multiplier;
}
#define thickness(thick) buf->thickness[thick]
static void NOINLINE
_hline(struct buf *buf, int x1, int x2, int y, int thick)
{
pixman_box32_t box = {
.x1 = min(max(x1, 0), buf->width),
.x2 = min(max(x2, 0), buf->width),
.y1 = min(max(y, 0), buf->height),
.y2 = min(max(y + thick, 0), buf->height),
};
pixman_image_fill_boxes(PIXMAN_OP_SRC, buf->pix, &white, 1, &box);
}
#define hline(x1, x2, y, thick) _hline(buf, x1, x2, y, thick)
static void NOINLINE
_vline(struct buf *buf, int y1, int y2, int x, int thick)
{
pixman_box32_t box = {
.x1 = min(max(x, 0), buf->width),
.x2 = min(max(x + thick, 0), buf->width),
.y1 = min(max(y1, 0), buf->height),
.y2 = min(max(y2, 0), buf->height),
};
pixman_image_fill_boxes(PIXMAN_OP_SRC, buf->pix, &white, 1, &box);
}
#define vline(y1, y2, x, thick) _vline(buf, y1, y2, x, thick)
static void NOINLINE
_rect(struct buf *buf, int x1, int y1, int x2, int y2)
{
pixman_box32_t box = {
.x1 = min(max(x1, 0), buf->width),
.y1 = min(max(y1, 0), buf->height),
.x2 = min(max(x2, 0), buf->width),
.y2 = min(max(y2, 0), buf->height),
};
pixman_image_fill_boxes(PIXMAN_OP_SRC, buf->pix, &white, 1, &box);
}
#define rect(x1, y1, x2, y2) _rect(buf, x1, y1, x2, y2)
static void NOINLINE
_hline_middle(struct buf *buf, enum thickness _thick)
{
int thick = thickness(_thick);
hline(0, buf->width, (buf->height - thick) / 2, thick);
}
static void NOINLINE
_hline_middle_left(struct buf *buf, enum thickness _vthick, enum thickness _hthick)
{
int vthick = thickness(_vthick);
int hthick = thickness(_hthick);
_hline(buf, 0, (buf->width + vthick) / 2, (buf->height - hthick) / 2, hthick);
}
static void NOINLINE
_hline_middle_right(struct buf *buf, enum thickness _vthick, enum thickness _hthick)
{
int vthick = thickness(_vthick);
int hthick = thickness(_hthick);
hline((buf->width - vthick) / 2, buf->width, (buf->height - hthick) / 2, hthick);
}
static void NOINLINE
_vline_middle(struct buf *buf, enum thickness _thick)
{
int thick = thickness(_thick);
vline(0, buf->height, (buf->width - thick) / 2, thick);
}
static void NOINLINE
_vline_middle_up(struct buf *buf, enum thickness _vthick, enum thickness _hthick)
{
int vthick = thickness(_vthick);
int hthick = thickness(_hthick);
vline(0, (buf->height + hthick) / 2, (buf->width - vthick) / 2, vthick);
}
static void NOINLINE
_vline_middle_down(struct buf *buf, enum thickness _vthick, enum thickness _hthick)
{
int vthick = thickness(_vthick);
int hthick = thickness(_hthick);
vline((buf->height - hthick) / 2, buf->height, (buf->width - vthick) / 2, vthick);
}
#define hline_middle(thick) _hline_middle(buf, thick)
#define hline_middle_left(thick) _hline_middle_left(buf, thick, thick)
#define hline_middle_right(thick) _hline_middle_right(buf, thick, thick)
#define hline_middle_left_mixed(vthick, hthick) _hline_middle_left(buf, vthick, hthick)
#define hline_middle_right_mixed(vthick, hthick) _hline_middle_right(buf, vthick, hthick)
#define vline_middle(thick) _vline_middle(buf, thick)
#define vline_middle_up(thick) _vline_middle_up(buf, thick, thick)
#define vline_middle_down(thick) _vline_middle_down(buf, thick, thick)
#define vline_middle_up_mixed(vthick, hthick) _vline_middle_up(buf, vthick, hthick)
#define vline_middle_down_mixed(vthick, hthick) _vline_middle_down(buf, vthick, hthick)
static void
draw_box_drawings_light_horizontal(struct buf *buf)
{
hline_middle(LIGHT);
}
static void
draw_box_drawings_heavy_horizontal(struct buf *buf)
{
hline_middle(HEAVY);
}
static void
draw_box_drawings_light_vertical(struct buf *buf)
{
vline_middle(LIGHT);
}
static void
draw_box_drawings_heavy_vertical(struct buf *buf)
{
vline_middle(HEAVY);
}
static void
draw_box_drawings_dash_horizontal(struct buf *buf, int count, int thick, int gap)
{
int width = buf->width;
int height = buf->height;
xassert(count >= 2 && count <= 4);
const int gap_count = count - 1;
int dash_width = (width - (gap_count * gap)) / count;
while (dash_width <= 0 && gap > 1) {
gap--;
dash_width = (width - (gap_count * gap)) / count;
}
if (dash_width <= 0) {
hline_middle(LIGHT);
return;
}
xassert(count * dash_width + gap_count * gap <= width);
int remaining = width - count * dash_width - gap_count * gap;
int x[4] = {0};
int w[4] = {dash_width, dash_width, dash_width, dash_width};
x[0] = 0;
x[1] = x[0] + w[0] + gap;
if (count == 2)
w[1] = width - x[1];
else if (count == 3)
w[1] += remaining;
else
w[1] += remaining / 2;
if (count >= 3) {
x[2] = x[1] + w[1] + gap;
if (count == 3)
w[2] = width - x[2];
else
w[2] += remaining - remaining / 2;
}
if (count >= 4) {
x[3] = x[2] + w[2] + gap;
w[3] = width - x[3];
}
hline(x[0], x[0] + w[0], (height - thick) / 2, thick);
hline(x[1], x[1] + w[1], (height - thick) / 2, thick);
if (count >= 3)
hline(x[2], x[2] + w[2], (height - thick) / 2, thick);
if (count >= 4)
hline(x[3], x[3] + w[3], (height - thick) / 2, thick);
}
static void
draw_box_drawings_dash_vertical(struct buf *buf, int count, int thick, int gap)
{
int width = buf->width;
int height = buf->height;
xassert(count >= 2 && count <= 4);
const int gap_count = count - 1;
int dash_height = (height - (gap_count * gap)) / count;
while (dash_height <= 0 && gap > 1) {
gap--;
dash_height = (height - (gap_count * gap)) / count;
}
if (dash_height <= 0) {
vline_middle(LIGHT);
return;
}
xassert(count * dash_height + gap_count * gap <= height);
int remaining = height - count * dash_height - gap_count * gap;
int y[4] = {0};
int h[4] = {dash_height, dash_height, dash_height, dash_height};
y[0] = 0;
y[1] = y[0] + h[0] + gap;
if (count == 2)
h[1] = height - y[1];
else if (count == 3)
h[1] += remaining;
else
h[1] += remaining / 2;
if (count >= 3) {
y[2] = y[1] + h[1] + gap;
if (count == 3)
h[2] = height - y[2];
else
h[2] += remaining - remaining / 2;
}
if (count >= 4) {
y[3] = y[2] + h[2] + gap;
h[3] = height - y[3];
}
vline(y[0], y[0] + h[0], (width - thick) / 2, thick);
vline(y[1], y[1] + h[1], (width - thick) / 2, thick);
if (count >= 3)
vline(y[2], y[2] + h[2], (width - thick) / 2, thick);
if (count >= 4)
vline(y[3], y[3] + h[3], (width - thick) / 2, thick);
}
static void
draw_box_drawings_light_triple_dash_horizontal(struct buf *buf)
{
draw_box_drawings_dash_horizontal(buf, 3, thickness(LIGHT), thickness(LIGHT));
}
static void
draw_box_drawings_heavy_triple_dash_horizontal(struct buf *buf)
{
draw_box_drawings_dash_horizontal(buf, 3, thickness(HEAVY), thickness(LIGHT));
}
static void
draw_box_drawings_light_triple_dash_vertical(struct buf *buf)
{
draw_box_drawings_dash_vertical(buf, 3, thickness(LIGHT), thickness(HEAVY));
}
static void
draw_box_drawings_heavy_triple_dash_vertical(struct buf *buf)
{
draw_box_drawings_dash_vertical(buf, 3, thickness(HEAVY), thickness(HEAVY));
}
static void
draw_box_drawings_light_quadruple_dash_horizontal(struct buf *buf)
{
draw_box_drawings_dash_horizontal(buf, 4, thickness(LIGHT), thickness(LIGHT));
}
static void
draw_box_drawings_heavy_quadruple_dash_horizontal(struct buf *buf)
{
draw_box_drawings_dash_horizontal(buf, 4, thickness(HEAVY), thickness(LIGHT));
}
static void
draw_box_drawings_light_quadruple_dash_vertical(struct buf *buf)
{
draw_box_drawings_dash_vertical(buf, 4, thickness(LIGHT), thickness(LIGHT));
}
static void
draw_box_drawings_heavy_quadruple_dash_vertical(struct buf *buf)
{
draw_box_drawings_dash_vertical(buf, 4, thickness(HEAVY), thickness(LIGHT));
}
static void
draw_box_drawings_light_down_and_right(struct buf *buf)
{
hline_middle_right(LIGHT);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_light_and_right_heavy(struct buf *buf)
{
hline_middle_right_mixed(LIGHT, HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_heavy_and_right_light(struct buf *buf)
{
hline_middle_right(LIGHT);
vline_middle_down_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_heavy_down_and_right(struct buf *buf)
{
hline_middle_right(HEAVY);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_light_down_and_left(struct buf *buf)
{
hline_middle_left(LIGHT);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_light_and_left_heavy(struct buf *buf)
{
hline_middle_left_mixed(LIGHT, HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_heavy_and_left_light(struct buf *buf)
{
hline_middle_left(LIGHT);
vline_middle_down_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_heavy_down_and_left(struct buf *buf)
{
hline_middle_left(HEAVY);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_light_up_and_right(struct buf *buf)
{
hline_middle_right(LIGHT);
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_up_light_and_right_heavy(struct buf *buf)
{
hline_middle_right_mixed(LIGHT, HEAVY);
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_up_heavy_and_right_light(struct buf *buf)
{
hline_middle_right(LIGHT);
vline_middle_up_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_heavy_up_and_right(struct buf *buf)
{
hline_middle_right(HEAVY);
vline_middle_up(HEAVY);
}
static void
draw_box_drawings_light_up_and_left(struct buf *buf)
{
hline_middle_left(LIGHT);
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_up_light_and_left_heavy(struct buf *buf)
{
hline_middle_left_mixed(LIGHT, HEAVY);
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_up_heavy_and_left_light(struct buf *buf)
{
hline_middle_left(LIGHT);
vline_middle_up_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_heavy_up_and_left(struct buf *buf)
{
hline_middle_left(HEAVY);
vline_middle_up(HEAVY);
}
static void
draw_box_drawings_light_vertical_and_right(struct buf *buf)
{
hline_middle_right(LIGHT);
vline_middle(LIGHT);
}
static void
draw_box_drawings_vertical_light_and_right_heavy(struct buf *buf)
{
hline_middle_right_mixed(LIGHT, HEAVY);
vline_middle(LIGHT);
}
static void
draw_box_drawings_up_heavy_and_right_down_light(struct buf *buf)
{
hline_middle_right(LIGHT);
vline_middle_up_mixed(HEAVY, LIGHT);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_heavy_and_right_up_light(struct buf *buf)
{
hline_middle_right(LIGHT);
vline_middle_up(LIGHT);
vline_middle_down_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_vertical_heavy_and_right_light(struct buf *buf)
{
hline_middle_right(LIGHT);
vline_middle(HEAVY);
}
static void
draw_box_drawings_down_light_and_right_up_heavy(struct buf *buf)
{
hline_middle_right(HEAVY);
vline_middle_up(HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_up_light_and_right_down_heavy(struct buf *buf)
{
hline_middle_right(HEAVY);
vline_middle_up(LIGHT);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_heavy_vertical_and_right(struct buf *buf)
{
hline_middle_right(HEAVY);
vline_middle(HEAVY);
}
static void
draw_box_drawings_light_vertical_and_left(struct buf *buf)
{
hline_middle_left(LIGHT);
vline_middle(LIGHT);
}
static void
draw_box_drawings_vertical_light_and_left_heavy(struct buf *buf)
{
hline_middle_left_mixed(LIGHT, HEAVY);
vline_middle(LIGHT);
}
static void
draw_box_drawings_up_heavy_and_left_down_light(struct buf *buf)
{
hline_middle_left(LIGHT);
vline_middle_up_mixed(HEAVY, LIGHT);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_heavy_and_left_up_light(struct buf *buf)
{
hline_middle_left(LIGHT);
vline_middle_up(LIGHT);
vline_middle_down_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_vertical_heavy_and_left_light(struct buf *buf)
{
hline_middle_left(LIGHT);
vline_middle(HEAVY);
}
static void
draw_box_drawings_down_light_and_left_up_heavy(struct buf *buf)
{
hline_middle_left(HEAVY);
vline_middle_up(HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_up_light_and_left_down_heavy(struct buf *buf)
{
hline_middle_left(HEAVY);
vline_middle_up(LIGHT);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_heavy_vertical_and_left(struct buf *buf)
{
hline_middle_left(HEAVY);
vline_middle(HEAVY);
}
static void
draw_box_drawings_light_down_and_horizontal(struct buf *buf)
{
hline_middle(LIGHT);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_left_heavy_and_right_down_light(struct buf *buf)
{
hline_middle_left_mixed(LIGHT, HEAVY);
hline_middle_right(LIGHT);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_right_heavy_and_left_down_light(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right_mixed(LIGHT, HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_light_and_horizontal_heavy(struct buf *buf)
{
hline_middle(HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_heavy_and_horizontal_light(struct buf *buf)
{
hline_middle(LIGHT);
vline_middle_down_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_right_light_and_left_down_heavy(struct buf *buf)
{
hline_middle_left(HEAVY);
hline_middle_right(LIGHT);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_left_light_and_right_down_heavy(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right(HEAVY);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_heavy_down_and_horizontal(struct buf *buf)
{
hline_middle(HEAVY);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_light_up_and_horizontal(struct buf *buf)
{
hline_middle(LIGHT);
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_left_heavy_and_right_up_light(struct buf *buf)
{
hline_middle_left_mixed(LIGHT, HEAVY);
hline_middle_right(LIGHT);
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_right_heavy_and_left_up_light(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right_mixed(LIGHT, HEAVY);
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_up_light_and_horizontal_heavy(struct buf *buf)
{
hline_middle(HEAVY);
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_up_heavy_and_horizontal_light(struct buf *buf)
{
hline_middle(LIGHT);
vline_middle_up_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_right_light_and_left_up_heavy(struct buf *buf)
{
hline_middle_left(HEAVY);
hline_middle_right(LIGHT);
vline_middle_up(HEAVY);
}
static void
draw_box_drawings_left_light_and_right_up_heavy(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right(HEAVY);
vline_middle_up(HEAVY);
}
static void
draw_box_drawings_heavy_up_and_horizontal(struct buf *buf)
{
hline_middle(HEAVY);
vline_middle_up(HEAVY);
}
static void
draw_box_drawings_light_vertical_and_horizontal(struct buf *buf)
{
hline_middle(LIGHT);
vline_middle(LIGHT);
}
static void
draw_box_drawings_left_heavy_and_right_vertical_light(struct buf *buf)
{
hline_middle_left_mixed(LIGHT, HEAVY);
hline_middle_right(LIGHT);
vline_middle(LIGHT);
}
static void
draw_box_drawings_right_heavy_and_left_vertical_light(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right_mixed(LIGHT, HEAVY);
vline_middle(LIGHT);
}
static void
draw_box_drawings_vertical_light_and_horizontal_heavy(struct buf *buf)
{
hline_middle(HEAVY);
vline_middle(LIGHT);
}
static void
draw_box_drawings_up_heavy_and_down_horizontal_light(struct buf *buf)
{
hline_middle(LIGHT);
vline_middle_up_mixed(HEAVY, LIGHT);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_down_heavy_and_up_horizontal_light(struct buf *buf)
{
hline_middle(LIGHT);
vline_middle_up(LIGHT);
vline_middle_down_mixed(HEAVY, LIGHT);
}
static void
draw_box_drawings_vertical_heavy_and_horizontal_light(struct buf *buf)
{
hline_middle(LIGHT);
vline_middle(HEAVY);
}
static void
draw_box_drawings_left_up_heavy_and_right_down_light(struct buf *buf)
{
hline_middle_left(HEAVY);
hline_middle_right(LIGHT);
vline_middle_up(HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_right_up_heavy_and_left_down_light(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right(HEAVY);
vline_middle_up(HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_left_down_heavy_and_right_up_light(struct buf *buf)
{
hline_middle_left(HEAVY);
hline_middle_right(LIGHT);
vline_middle_up(LIGHT);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_right_down_heavy_and_left_up_light(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right(HEAVY);
vline_middle_up(LIGHT);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_down_light_and_up_horizontal_heavy(struct buf *buf)
{
hline_middle(HEAVY);
vline_middle_up(HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_up_light_and_down_horizontal_heavy(struct buf *buf)
{
hline_middle(HEAVY);
vline_middle_up(LIGHT);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_right_light_and_left_vertical_heavy(struct buf *buf)
{
hline_middle_left(HEAVY);
hline_middle_right(LIGHT);
vline_middle(HEAVY);
}
static void
draw_box_drawings_left_light_and_right_vertical_heavy(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right(HEAVY);
vline_middle(HEAVY);
}
static void
draw_box_drawings_heavy_vertical_and_horizontal(struct buf *buf)
{
hline_middle(HEAVY);
vline_middle(HEAVY);
}
static void
draw_box_drawings_light_double_dash_horizontal(struct buf *buf)
{
draw_box_drawings_dash_horizontal(buf, 2, thickness(LIGHT), thickness(LIGHT));
}
static void
draw_box_drawings_heavy_double_dash_horizontal(struct buf *buf)
{
draw_box_drawings_dash_horizontal(buf, 2, thickness(HEAVY), thickness(LIGHT));
}
static void
draw_box_drawings_light_double_dash_vertical(struct buf *buf)
{
draw_box_drawings_dash_vertical(buf, 2, thickness(LIGHT), thickness(HEAVY));
}
static void
draw_box_drawings_heavy_double_dash_vertical(struct buf *buf)
{
draw_box_drawings_dash_vertical(buf, 2, thickness(HEAVY), thickness(HEAVY));
}
static void
draw_box_drawings_double_horizontal(struct buf *buf)
{
int thick = thickness(LIGHT);
int mid = (buf->height - thick * 3) / 2;
hline(0, buf->width, mid, thick);
hline(0, buf->width, mid + 2 * thick, thick);
}
static void
draw_box_drawings_double_vertical(struct buf *buf)
{
int thick = thickness(LIGHT);
int mid = (buf->width - thick * 3) / 2;
vline(0, buf->height, mid, thick);
vline(0, buf->height, mid + 2 * thick, thick);
}
static void
draw_box_drawings_down_single_and_right_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick) / 2;
vline_middle_down(LIGHT);
hline(vmid, buf->width, hmid, thick);
hline(vmid, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_down_double_and_right_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick) / 2;
int vmid = (buf->width - thick * 3) / 2;
hline_middle_right(LIGHT);
vline(hmid, buf->height, vmid, thick);
vline(hmid, buf->height, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_down_and_right(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
vline(hmid, buf->height, vmid, thick);
vline(hmid + 2 * thick, buf->height, vmid + 2 * thick, thick);
hline(vmid, buf->width, hmid, thick);
hline(vmid + 2 * thick, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_down_single_and_left_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width + thick) / 2;
vline_middle_down(LIGHT);
hline(0, vmid, hmid, thick);
hline(0, vmid, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_down_double_and_left_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick) / 2;
int vmid = (buf->width - thick * 3) / 2;
hline_middle_left(LIGHT);
vline(hmid, buf->height, vmid, thick);
vline(hmid, buf->height, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_down_and_left(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
vline(hmid + 2 * thick, buf->height, vmid, thick);
vline(hmid, buf->height, vmid + 2 * thick, thick);
hline(0, vmid + 2 * thick, hmid, thick);
hline(0, vmid, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_up_single_and_right_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick) / 2;
vline_middle_up(LIGHT);
hline(vmid, buf->width, hmid, thick);
hline(vmid, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_up_double_and_right_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height + thick) / 2;
int vmid = (buf->width - thick * 3) / 2;
hline_middle_right(LIGHT);
vline(0, hmid, vmid, thick);
vline(0, hmid, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_up_and_right(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
vline(0, hmid + 2 * thick, vmid, thick);
vline(0, hmid, vmid + 2 * thick, thick);
hline(vmid + 2 * thick, buf->width, hmid, thick);
hline(vmid, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_up_single_and_left_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width + thick) / 2;
vline_middle_up(LIGHT);
hline(0, vmid, hmid, thick);
hline(0, vmid, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_up_double_and_left_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height + thick) / 2;
int vmid = (buf->width - thick * 3) / 2;
hline_middle_left(LIGHT);
vline(0, hmid, vmid, thick);
vline(0, hmid, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_up_and_left(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
vline(0, hmid + 0 * thick + thick, vmid, thick);
vline(0, hmid + 2 * thick + thick, vmid + 2 * thick, thick);
hline(0, vmid, hmid, thick);
hline(0, vmid + 2 * thick, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_vertical_single_and_right_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick) / 2;
vline_middle(LIGHT);
hline(vmid, buf->width, hmid, thick);
hline(vmid, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_vertical_double_and_right_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int vmid = (buf->width - thick * 3) / 2;
hline(vmid + 2 * thick, buf->width, (buf->height - thick) / 2, thick);
vline(0, buf->height, vmid, thick);
vline(0, buf->height, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_vertical_and_right(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
vline(0, buf->height, vmid, thick);
vline(0, hmid, vmid + 2 * thick, thick);
vline(hmid + 2 * thick, buf->height, vmid + 2 * thick, thick);
hline(vmid + 2 * thick, buf->width, hmid, thick);
hline(vmid + 2 * thick, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_vertical_single_and_left_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width + thick) / 2;
vline_middle(LIGHT);
hline(0, vmid, hmid, thick);
hline(0, vmid, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_vertical_double_and_left_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int vmid = (buf->width - thick * 3) / 2;
hline(0, vmid, (buf->height - thick) / 2, thick);
vline(0, buf->height, vmid, thick);
vline(0, buf->height, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_vertical_and_left(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
vline(0, buf->height, vmid + 2 * thick, thick);
vline(0, hmid, vmid, thick);
vline(hmid + 2 * thick, buf->height, vmid, thick);
hline(0, vmid + thick, hmid, thick);
hline(0, vmid, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_down_single_and_horizontal_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
vline(hmid + 2 * thick, buf->height, (buf->width - thick) / 2, thick);
hline(0, buf->width, hmid, thick);
hline(0, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_down_double_and_horizontal_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick) / 2;
int vmid = (buf->width - thick * 3) / 2;
hline_middle(LIGHT);
vline(hmid, buf->height, vmid, thick);
vline(hmid, buf->height, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_down_and_horizontal(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
hline(0, buf->width, hmid, thick);
hline(0, vmid, hmid + 2 * thick, thick);
hline(vmid + 2 * thick, buf->width, hmid + 2 * thick, thick);
vline(hmid + 2 * thick, buf->height, vmid, thick);
vline(hmid + 2 * thick, buf->height, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_up_single_and_horizontal_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick) / 2;
vline(0, hmid, vmid, thick);
hline(0, buf->width, hmid, thick);
hline(0, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_up_double_and_horizontal_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick) / 2;
int vmid = (buf->width - thick * 3) / 2;
hline_middle(LIGHT);
vline(0, hmid, vmid, thick);
vline(0, hmid, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_up_and_horizontal(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
vline(0, hmid, vmid, thick);
vline(0, hmid, vmid + 2 * thick, thick);
hline(0, vmid + thick, hmid, thick);
hline(vmid + 2 * thick, buf->width, hmid, thick);
hline(0, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_vertical_single_and_horizontal_double(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
vline_middle(LIGHT);
hline(0, buf->width, hmid, thick);
hline(0, buf->width, hmid + 2 * thick, thick);
}
static void
draw_box_drawings_vertical_double_and_horizontal_single(struct buf *buf)
{
int thick = thickness(LIGHT);
int vmid = (buf->width - thick * 3) / 2;
hline_middle(LIGHT);
vline(0, buf->height, vmid, thick);
vline(0, buf->height, vmid + 2 * thick, thick);
}
static void
draw_box_drawings_double_vertical_and_horizontal(struct buf *buf)
{
int thick = thickness(LIGHT);
int hmid = (buf->height - thick * 3) / 2;
int vmid = (buf->width - thick * 3) / 2;
hline(0, vmid, hmid, thick);
hline(vmid + 2 * thick, buf->width, hmid, thick);
hline(0, vmid, hmid + 2 * thick, thick);
hline(vmid + 2 * thick, buf->width, hmid + 2 * thick, thick);
vline(0, hmid + thick, vmid, thick);
vline(0, hmid, vmid + 2 * thick, thick);
vline(hmid + 2 * thick, buf->height, vmid, thick);
vline(hmid + 2 * thick, buf->height, vmid + 2 * thick, thick);
}
static inline void
set_a1_bit(uint8_t *data, size_t ofs, size_t bit_no)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
data[ofs] |= 1 << bit_no;
#else
data[ofs] |= 1 << (7 - bit_no);
#endif
}
static void NOINLINE
draw_box_drawings_light_arc(struct buf *buf, wchar_t wc)
{
const pixman_format_code_t fmt = buf->format;
const int supersample = fmt == PIXMAN_a8 ? 4 : 1;
const int height = buf->height * supersample;
const int width = buf->width * supersample;
const int stride = fmt == PIXMAN_a8
? stride_for_format_and_width(PIXMAN_a8, width) : buf->stride;
uint8_t *data = supersample > 1 ? xcalloc(height * stride, 1) : buf->data;
const int thick = thickness(LIGHT) * supersample;
const bool thick_is_odd = (thick / supersample) % 2;
const bool height_is_odd = buf->height % 2;
const bool width_is_odd = buf->width % 2;
const double a = (width - thick) / 2;
const double b = (height - thick) / 2;
const double a2 = a * a;
const double b2 = b * b;
const int num_samples = height * 16;
for (int i = 0; i < num_samples; i++) {
double y = i / 16.;
double x = sqrt(a2 * (1. - y * y / b2));
const int row = round(y);
const int col = round(x);
if (col < 0)
continue;
int row_start = 0;
int row_end = 0;
int col_start = 0;
int col_end = 0;
/*
* At this point, row/col is only correct for ╯. For the other
* arcs, we need to mirror the arc around either the x-, y- or
* both axis.
*
* When doing so, we need to adjust for asymmetrical cell
* dimensions.
*
* The amazing box drawing art below represents the lower part
* of a cell, with the beginning of a vertical line in the
* middle. Each column represents one pixel.
*
*
* Even cell Odd cell
*
* │ │ │ │
* Even line │ ┆ ┆ │ │ ┆ ┆ │
* │ ┆ ┆ │ │ ┆ ┆ │
* └─┴─┴─┴─┘ └─┴─┴─┴─┴─┘
*
*
* │ │ │ │
* Odd line │ ┆ ┆ │ │ ┆ ┆ │
* │ ┆ ┆ │ │ ┆ ┆ │
* └─┴─┴─┴─┘ └─┴─┴─┴─┴─┘
*
* As can be seen(?), the resulting line is asymmetrical when
* *either* the cell is odd sized, *or* the line is odd
* sized. But not when both are.
*
* Hence the ‘thick % 2 ^ width % 2’ in the expressions below.
*/
switch (wc) {
case L'╭':
row_end = height - row - (thick_is_odd ^ height_is_odd);
row_start = row_end - thick;
col_end = width - col - (thick_is_odd ^ width_is_odd);
col_start = col_end - thick;
break;
case L'╮':
row_end = height - row - (thick_is_odd ^ height_is_odd);
row_start = row_end - thick;
col_start = col - ((thick_is_odd ^ width_is_odd) ? supersample / 2 : 0);
col_end = col_start + thick;
break;
case L'╰':
row_start = row - ((thick_is_odd ^ height_is_odd) ? supersample / 2 : 0);
row_end = row_start + thick;
col_end = width - col - (thick_is_odd ^ width_is_odd);
col_start = col_end - thick;
break;
case L'╯':
row_start = row - ((thick_is_odd ^ height_is_odd) ? supersample / 2 : 0);
row_end = row_start + thick;
col_start = col - ((thick_is_odd ^ width_is_odd) ? supersample / 2 : 0);
col_end = col_start + thick;
break;
}
xassert(row_end > row_start);
xassert(col_end > col_start);
for (int r = max(row_start, 0); r < max(min(row_end, height), 0); r++) {
for (int c = max(col_start, 0); c < max(min(col_end, width), 0); c++) {
if (fmt == PIXMAN_a1) {
size_t idx = c / 8;
size_t bit_no = c % 8;
set_a1_bit(data, r * stride + idx, bit_no);
} else
data[r * stride + c] = 0xff;
}
}
}
/*
* Since a cell may not be completely symmetrical around its y-
* and x-axis, the mirroring done above may result in the last
* col/row of the arc not being filled in. This code ensures they
* are.
*/
if (wc == L'╭' || wc == L'╰') {
for (int y = 0; y < thick; y++) {
int row = (height - thick) / 2 + y - ((thick_is_odd ^ height_is_odd) ? supersample / 2 : 0);
for (int col = width - supersample; col < width; col++) {
if (row >= 0 && row < height && col >= 0) {
if (fmt == PIXMAN_a1) {
size_t ofs = col / 8;
size_t bit_no = col % 8;
set_a1_bit(data, row * stride + ofs, bit_no);
} else
data[row * stride + col] = 0xff;
}
}
}
}
if (wc == L'╭' || wc == L'╮') {
for (int x = 0; x < thick; x++) {
int col = (width - thick) / 2 + x - ((thick_is_odd ^ width_is_odd) ? supersample / 2 : 0);
for (int row = height - supersample; row < height; row++) {
if (row >= 0 && col >= 0 && col < width) {
if (fmt == PIXMAN_a1) {
size_t ofs = col / 8;
size_t bit_no = col % 8;
set_a1_bit(data, row * stride + ofs, bit_no);
} else
data[row * stride + col] = 0xff;
}
}
}
}
if (fmt == PIXMAN_a8) {
xassert(data != buf->data);
/* Downsample */
for (size_t r = 0; r < buf->height; r++) {
for (size_t c = 0; c < buf->width; c++) {
uint32_t total = 0;
for (size_t i = 0; i < supersample; i++) {
for (size_t j = 0; j < supersample; j++)
total += data[(r * supersample + i) * stride + c * supersample + j];
}
uint8_t average = min(total / (supersample * supersample), 0xff);
buf->data[r * buf->stride + c] = average;
}
}
free(data);
}
}
static void NOINLINE
draw_box_drawings_light_diagonal_upper_right_to_lower_left(struct buf *buf)
{
pixman_trapezoid_t trap = {
.top = pixman_int_to_fixed(0),
.bottom = pixman_int_to_fixed(buf->height),
.left = {
.p1 = {
.x = pixman_double_to_fixed(buf->width - thickness(LIGHT) / 2.),
.y = pixman_int_to_fixed(0),
},
.p2 = {
.x = pixman_double_to_fixed(0 - thickness(LIGHT) / 2.),
.y = pixman_int_to_fixed(buf->height),
},
},
.right = {
.p1 = {
.x = pixman_double_to_fixed(buf->width + thickness(LIGHT) / 2.),
.y = pixman_int_to_fixed(0),
},
.p2 = {
.x = pixman_double_to_fixed(0 + thickness(LIGHT) / 2.),
.y = pixman_int_to_fixed(buf->height),
},
},
};
pixman_rasterize_trapezoid(buf->pix, &trap, 0, 0);
}
static void NOINLINE
draw_box_drawings_light_diagonal_upper_left_to_lower_right(struct buf *buf)
{
pixman_trapezoid_t trap = {
.top = pixman_int_to_fixed(0),
.bottom = pixman_int_to_fixed(buf->height),
.left = {
.p1 = {
.x = pixman_double_to_fixed(0 - thickness(LIGHT) / 2.),
.y = pixman_int_to_fixed(0),
},
.p2 = {
.x = pixman_double_to_fixed(buf->width - thickness(LIGHT) / 2.),
.y = pixman_int_to_fixed(buf->height),
},
},
.right = {
.p1 = {
.x = pixman_double_to_fixed(0 + thickness(LIGHT) / 2.),
.y = pixman_int_to_fixed(0),
},
.p2 = {
.x = pixman_double_to_fixed(buf->width + thickness(LIGHT) / 2.),
.y = pixman_int_to_fixed(buf->height),
},
},
};
pixman_rasterize_trapezoid(buf->pix, &trap, 0, 0);
}
static void
draw_box_drawings_light_diagonal_cross(struct buf *buf)
{
draw_box_drawings_light_diagonal_upper_right_to_lower_left(buf);
draw_box_drawings_light_diagonal_upper_left_to_lower_right(buf);
}
static void
draw_box_drawings_light_left(struct buf *buf)
{
hline_middle_left(LIGHT);
}
static void
draw_box_drawings_light_up(struct buf *buf)
{
vline_middle_up(LIGHT);
}
static void
draw_box_drawings_light_right(struct buf *buf)
{
hline_middle_right(LIGHT);
}
static void
draw_box_drawings_light_down(struct buf *buf)
{
vline_middle_down(LIGHT);
}
static void
draw_box_drawings_heavy_left(struct buf *buf)
{
hline_middle_left(HEAVY);
}
static void
draw_box_drawings_heavy_up(struct buf *buf)
{
vline_middle_up(HEAVY);
}
static void
draw_box_drawings_heavy_right(struct buf *buf)
{
hline_middle_right(HEAVY);
}
static void
draw_box_drawings_heavy_down(struct buf *buf)
{
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_light_left_and_heavy_right(struct buf *buf)
{
hline_middle_left(LIGHT);
hline_middle_right(HEAVY);
}
static void
draw_box_drawings_light_up_and_heavy_down(struct buf *buf)
{
vline_middle_up(LIGHT);
vline_middle_down(HEAVY);
}
static void
draw_box_drawings_heavy_left_and_light_right(struct buf *buf)
{
hline_middle_left(HEAVY);
hline_middle_right(LIGHT);
}
static void
draw_box_drawings_heavy_up_and_light_down(struct buf *buf)
{
vline_middle_up(HEAVY);
vline_middle_down(LIGHT);
}
static void
draw_upper_half_block(struct buf *buf)
{
rect(0, 0, buf->width, round(buf->height / 2.));
}
static void
draw_lower_one_eighth_block(struct buf *buf)
{
rect(0, buf->height - round(buf->height / 8.), buf->width, buf->height);
}
static void
draw_lower_one_quarter_block(struct buf *buf)
{
rect(0, buf->height - round(buf->height / 4.), buf->width, buf->height);
}
static void
draw_lower_three_eighths_block(struct buf *buf)
{
rect(0, buf->height - round(3. * buf->height / 8.), buf->width, buf->height);
}
static void
draw_lower_half_block(struct buf *buf)
{
rect(0, buf->height - round(buf->height / 2.), buf->width, buf->height);
}
static void
draw_lower_five_eighths_block(struct buf *buf)
{
rect(0, buf->height - round(5. * buf->height / 8.), buf->width, buf->height);
}
static void
draw_lower_three_quarters_block(struct buf *buf)
{
rect(0, buf->height - round(3. * buf->height / 4.), buf->width, buf->height);
}
static void
draw_lower_seven_eighths_block(struct buf *buf)
{
rect(0, buf->height - round(7. * buf->height / 8.), buf->width, buf->height);
}
static void
draw_upper_one_quarter_block(struct buf *buf)
{
rect(0, 0, buf->width, round(buf->height / 4.));
}
static void
draw_upper_three_eighths_block(struct buf *buf)
{
rect(0, 0, buf->width, round(3. * buf->height / 8.));
}
static void
draw_upper_five_eighths_block(struct buf *buf)
{
rect(0, 0, buf->width, round(5. * buf->height / 8.));
}
static void
draw_upper_three_quarters_block(struct buf *buf)
{
rect(0, 0, buf->width, round(3. * buf->height / 4.));
}
static void
draw_upper_seven_eighths_block(struct buf *buf)
{
rect(0, 0, buf->width, round(7. * buf->height / 8.));
}
static void
draw_full_block(struct buf *buf)
{
rect(0, 0, buf->width, buf->height);
}
static void
draw_left_seven_eighths_block(struct buf *buf)
{
rect(0, 0, round(7. * buf->width / 8.), buf->height);
}
static void
draw_left_three_quarters_block(struct buf *buf)
{
rect(0, 0, round(3. * buf->width / 4.), buf->height);
}
static void
draw_left_five_eighths_block(struct buf *buf)
{
rect(0, 0, round(5. * buf->width / 8.), buf->height);
}
static void
draw_left_half_block(struct buf *buf)
{
rect(0, 0, round(buf->width / 2.), buf->height);
}
static void
draw_left_three_eighths_block(struct buf *buf)
{
rect(0, 0, round(3. * buf->width / 8.), buf->height);
}
static void
draw_left_one_quarter_block(struct buf *buf)
{
rect(0, 0, round(buf->width / 4.), buf->height);
}
static void
draw_vertical_one_eighth_block_n(struct buf *buf, int n)
{
double x = round((double)n * buf->width / 8.);
double w = round(buf->width / 8.);
rect(x, 0, x + w, buf->height);
}
static void
draw_left_one_eighth_block(struct buf *buf)
{
draw_vertical_one_eighth_block_n(buf, 0);
}
static void
draw_vertical_one_eighth_block_2(struct buf *buf)
{
draw_vertical_one_eighth_block_n(buf, 1);
}
static void
draw_vertical_one_eighth_block_3(struct buf *buf)
{
draw_vertical_one_eighth_block_n(buf, 2);
}
static void
draw_vertical_one_eighth_block_4(struct buf *buf)
{
draw_vertical_one_eighth_block_n(buf, 3);
}
static void
draw_vertical_one_eighth_block_5(struct buf *buf)
{
draw_vertical_one_eighth_block_n(buf, 4);
}
static void
draw_vertical_one_eighth_block_6(struct buf *buf)
{
draw_vertical_one_eighth_block_n(buf, 5);
}
static void
draw_vertical_one_eighth_block_7(struct buf *buf)
{
draw_vertical_one_eighth_block_n(buf, 6);
}
static void
draw_right_half_block(struct buf *buf)
{
rect(round(buf->width / 2.), 0, buf->width, buf->height);
}
static void NOINLINE
draw_pixman_shade(struct buf *buf, uint16_t v)
{
pixman_color_t shade = {.red = 0, .green = 0, .blue = 0, .alpha = v};
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, &shade, 1,
(pixman_rectangle16_t []){{0, 0, buf->width, buf->height}});
}
static void
draw_light_shade(struct buf *buf)
{
pixman_format_code_t fmt = buf->format;
if (buf->solid_shades && fmt == PIXMAN_a1)
change_buffer_format(buf, PIXMAN_a8);
else if (!buf->solid_shades && fmt == PIXMAN_a8)
change_buffer_format(buf, PIXMAN_a1);
if (buf->solid_shades)
draw_pixman_shade(buf, 0x4000);
else {
for (size_t row = 0; row < buf->height; row += 2) {
for (size_t col = 0; col < buf->width; col += 2) {
size_t idx = col / 8;
size_t bit_no = col % 8;
set_a1_bit(buf->data, row * buf->stride + idx, bit_no);
}
}
}
}
static void
draw_medium_shade(struct buf *buf)
{
pixman_format_code_t fmt = buf->format;
if (buf->solid_shades && fmt == PIXMAN_a1)
change_buffer_format(buf, PIXMAN_a8);
else if (!buf->solid_shades && fmt == PIXMAN_a8)
change_buffer_format(buf, PIXMAN_a1);
if (buf->solid_shades)
draw_pixman_shade(buf, 0x8000);
else {
for (size_t row = 0; row < buf->height; row++) {
for (size_t col = row % 2; col < buf->width; col += 2) {
size_t idx = col / 8;
size_t bit_no = col % 8;
set_a1_bit(buf->data, row * buf->stride + idx, bit_no);
}
}
}
}
static void
draw_dark_shade(struct buf *buf)
{
pixman_format_code_t fmt = buf->format;
if (buf->solid_shades && fmt == PIXMAN_a1)
change_buffer_format(buf, PIXMAN_a8);
else if (!buf->solid_shades && fmt == PIXMAN_a8)
change_buffer_format(buf, PIXMAN_a1);
if (buf->solid_shades)
draw_pixman_shade(buf, 0xc000);
else {
for (size_t row = 0; row < buf->height; row++) {
for (size_t col = 0; col < buf->width; col += 1 + row % 2) {
size_t idx = col / 8;
size_t bit_no = col % 8;
set_a1_bit(buf->data, row * buf->stride + idx, bit_no);
}
}
}
}
static void NOINLINE
draw_horizontal_one_eighth_block_n(struct buf *buf, int n)
{
double y = round((double)n * buf->height / 8.);
double h = round(buf->height / 8.);
rect(0, y, buf->width, y + h);
}
static void
draw_upper_one_eighth_block(struct buf *buf)
{
draw_horizontal_one_eighth_block_n(buf, 0);
}
static void
draw_horizontal_one_eighth_block_2(struct buf *buf)
{
draw_horizontal_one_eighth_block_n(buf, 1);
}
static void
draw_horizontal_one_eighth_block_3(struct buf *buf)
{
draw_horizontal_one_eighth_block_n(buf, 2);
}
static void
draw_horizontal_one_eighth_block_4(struct buf *buf)
{
draw_horizontal_one_eighth_block_n(buf, 3);
}
static void
draw_horizontal_one_eighth_block_5(struct buf *buf)
{
draw_horizontal_one_eighth_block_n(buf, 4);
}
static void
draw_horizontal_one_eighth_block_6(struct buf *buf)
{
draw_horizontal_one_eighth_block_n(buf, 5);
}
static void
draw_horizontal_one_eighth_block_7(struct buf *buf)
{
draw_horizontal_one_eighth_block_n(buf, 6);
}
static void
draw_right_one_eighth_block(struct buf *buf)
{
rect(buf->width - round(buf->width / 8.), 0, buf->width, buf->height);
}
static void
quad_upper_left(struct buf *buf)
{
rect(0, 0, ceil(buf->width / 2.), ceil(buf->height / 2.));
}
static void
quad_upper_right(struct buf *buf)
{
rect(floor(buf->width / 2.), 0, buf->width, ceil(buf->height / 2.));
}
static void
quad_lower_left(struct buf *buf)
{
rect(0, floor(buf->height / 2.), ceil(buf->width / 2.), buf->height);
}
static void
quad_lower_right(struct buf *buf)
{
rect(floor(buf->width / 2.), floor(buf->height / 2.), buf->width, buf->height);
}
static void NOINLINE
draw_quadrant(struct buf *buf, wchar_t wc)
{
enum {
UPPER_LEFT = 1 << 0,
UPPER_RIGHT = 1 << 1,
LOWER_LEFT = 1 << 2,
LOWER_RIGHT = 1 << 3,
};
static const uint8_t matrix[10] = {
LOWER_LEFT,
LOWER_RIGHT,
UPPER_LEFT,
UPPER_LEFT | LOWER_LEFT | LOWER_RIGHT,
UPPER_LEFT | LOWER_RIGHT,
UPPER_LEFT | UPPER_RIGHT | LOWER_LEFT,
UPPER_LEFT | UPPER_RIGHT | LOWER_RIGHT,
UPPER_RIGHT,
UPPER_RIGHT | LOWER_LEFT,
UPPER_RIGHT | LOWER_LEFT | LOWER_RIGHT,
};
xassert(wc >= 0x2596 && wc <= 0x259f);
const size_t idx = wc - 0x2596;
xassert(idx < ALEN(matrix));
uint8_t encoded = matrix[idx];
if (encoded & UPPER_LEFT)
quad_upper_left(buf);
if (encoded & UPPER_RIGHT)
quad_upper_right(buf);
if (encoded & LOWER_LEFT)
quad_lower_left(buf);
if (encoded & LOWER_RIGHT)
quad_lower_right(buf);
}
static void NOINLINE
draw_braille(struct buf *buf, wchar_t wc)
{
int w = min(buf->width / 4, buf->height / 8);
int x_spacing = buf->width / 4;
int y_spacing = buf->height / 8;
int x_margin = x_spacing / 2;
int y_margin = y_spacing / 2;
int x_px_left = buf->width - 2 * x_margin - x_spacing - 2 * w;
int y_px_left = buf->height - 2 * y_margin - 3 * y_spacing - 4 * w;
LOG_DBG(
"braille: before adjusting: "
"cell: %dx%d, margin=%dx%d, spacing=%dx%d, width=%d, left=%dx%d",
buf->width, buf->height, x_margin, y_margin, x_spacing, y_spacing,
w, x_pix_left, y_pix_left);
/* First, try hard to ensure the DOT width is non-zero */
if (x_px_left >= 2 && y_px_left >= 4 && w == 0) {
w++;
x_px_left -= 2;
y_px_left -= 4;
}
/* Second, prefer a non-zero margin */
if (x_px_left >= 2 && x_margin == 0) { x_margin = 1; x_px_left -= 2; }
if (y_px_left >= 2 && y_margin == 0) { y_margin = 1; y_px_left -= 2; }
/* Third, increase spacing */
if (x_px_left >= 1) { x_spacing++; x_px_left--; }
if (y_px_left >= 3) { y_spacing++; y_px_left -= 3; }
/* Fourth, margins (“spacing”, but on the sides) */
if (x_px_left >= 2) { x_margin++; x_px_left -= 2; }
if (y_px_left >= 2) { y_margin++; y_px_left -= 2; }
/* Last - increase dot width */
if (x_px_left >= 2 && y_px_left >= 4) {
w++;
x_px_left -= 2;
y_px_left -= 4;
}
LOG_DBG(
"braille: after adjusting: "
"cell: %dx%d, margin=%dx%d, spacing=%dx%d, width=%d, left=%dx%d",
buf->width, buf->height, x_margin, y_margin, x_spacing, y_spacing,
w, x_pix_left, y_pix_left);
xassert(x_px_left <= 1 || y_px_left <= 1);
xassert(2 * x_margin + 2 * w + x_spacing <= buf->width);
xassert(2 * y_margin + 4 * w + 3 * y_spacing <= buf->height);
int x[2], y[4];
x[0] = x_margin;
x[1] = x_margin + w + x_spacing;
y[0] = y_margin;
y[1] = y[0] + w + y_spacing;
y[2] = y[1] + w + y_spacing;
y[3] = y[2] + w + y_spacing;
assert(wc >= 0x2800);
assert(wc <= 0x28ff);
uint8_t sym = wc - 0x2800;
/* Left side */
if (sym & 1)
rect(x[0], y[0], x[0] + w, y[0] + w);
if (sym & 2)
rect(x[0], y[1], x[0] + w, y[1] + w);
if (sym & 4)
rect(x[0], y[2], x[0] + w, y[2] + w);
/* Right side */
if (sym & 8)
rect(x[1], y[0], x[1] + w, y[0] + w);
if (sym & 16)
rect(x[1], y[1], x[1] + w, y[1] + w);
if (sym & 32)
rect(x[1], y[2], x[1] + w, y[2] + w);
/* 8-dot patterns */
if (sym & 64)
rect(x[0], y[3], x[0] + w, y[3] + w);
if (sym & 128)
rect(x[1], y[3], x[1] + w, y[3] + w);
}
static void
sextant_upper_left(struct buf *buf)
{
rect(0, 0, buf->x_halfs[0], buf->y_thirds[0]);
}
static void
sextant_middle_left(struct buf *buf)
{
rect(0, buf->y_thirds[0], buf->x_halfs[0], buf->y_thirds[1]);
}
static void
sextant_lower_left(struct buf *buf)
{
rect(0, buf->y_thirds[1], buf->x_halfs[0], buf->height);
}
static void
sextant_upper_right(struct buf *buf)
{
rect(buf->x_halfs[1], 0, buf->width, buf->y_thirds[0]);
}
static void
sextant_middle_right(struct buf *buf)
{
rect(buf->x_halfs[1], buf->y_thirds[0], buf->width, buf->y_thirds[1]);
}
static void
sextant_lower_right(struct buf *buf)
{
rect(buf->x_halfs[1], buf->y_thirds[1], buf->width, buf->height);
}
static void NOINLINE
draw_sextant(struct buf *buf, wchar_t wc)
{
/*
* Each byte encodes one sextant:
*
* Bit sextant
* 0 upper left
* 1 middle left
* 2 lower left
* 3 upper right
* 4 middle right
* 5 lower right
*/
enum {
UPPER_LEFT = 1 << 0,
MIDDLE_LEFT = 1 << 1,
LOWER_LEFT = 1 << 2,
UPPER_RIGHT = 1 << 3,
MIDDLE_RIGHT = 1 << 4,
LOWER_RIGHT = 1 << 5,
};
static const uint8_t matrix[60] = {
/* U+1fb00 - U+1fb0f */
UPPER_LEFT,
UPPER_RIGHT,
UPPER_LEFT | UPPER_RIGHT,
MIDDLE_LEFT,
UPPER_LEFT | MIDDLE_LEFT,
UPPER_RIGHT | MIDDLE_LEFT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_LEFT,
MIDDLE_RIGHT,
UPPER_LEFT | MIDDLE_RIGHT,
UPPER_RIGHT | MIDDLE_RIGHT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_RIGHT,
MIDDLE_LEFT | MIDDLE_RIGHT,
UPPER_LEFT | MIDDLE_LEFT | MIDDLE_RIGHT,
UPPER_RIGHT | MIDDLE_LEFT | MIDDLE_RIGHT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_LEFT | MIDDLE_RIGHT,
LOWER_LEFT,
/* U+1fb10 - U+1fb1f */
UPPER_LEFT | LOWER_LEFT,
UPPER_RIGHT | LOWER_LEFT,
UPPER_LEFT | UPPER_RIGHT | LOWER_LEFT,
MIDDLE_LEFT | LOWER_LEFT,
UPPER_RIGHT | MIDDLE_LEFT | LOWER_LEFT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_LEFT | LOWER_LEFT,
MIDDLE_RIGHT | LOWER_LEFT,
UPPER_LEFT | MIDDLE_RIGHT | LOWER_LEFT,
UPPER_RIGHT | MIDDLE_RIGHT | LOWER_LEFT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_RIGHT | LOWER_LEFT,
MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_LEFT,
UPPER_LEFT | MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_LEFT,
UPPER_RIGHT | MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_LEFT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_LEFT,
LOWER_RIGHT,
UPPER_LEFT | LOWER_RIGHT,
/* U+1fb20 - U+1fb2f */
UPPER_RIGHT | LOWER_RIGHT,
UPPER_LEFT | UPPER_RIGHT | LOWER_RIGHT,
MIDDLE_LEFT | LOWER_RIGHT,
UPPER_LEFT | MIDDLE_LEFT | LOWER_RIGHT,
UPPER_RIGHT | MIDDLE_LEFT | LOWER_RIGHT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_LEFT | LOWER_RIGHT,
MIDDLE_RIGHT | LOWER_RIGHT,
UPPER_LEFT | MIDDLE_RIGHT | LOWER_RIGHT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_RIGHT | LOWER_RIGHT,
MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_RIGHT,
UPPER_LEFT | MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_RIGHT,
UPPER_RIGHT | MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_RIGHT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_RIGHT,
LOWER_LEFT | LOWER_RIGHT,
UPPER_LEFT | LOWER_LEFT | LOWER_RIGHT,
UPPER_RIGHT | LOWER_LEFT | LOWER_RIGHT,
/* U+1fb30 - U+1fb3b */
UPPER_LEFT | UPPER_RIGHT | LOWER_LEFT | LOWER_RIGHT,
MIDDLE_LEFT | LOWER_LEFT | LOWER_RIGHT,
UPPER_LEFT | MIDDLE_LEFT | LOWER_LEFT | LOWER_RIGHT,
UPPER_RIGHT | MIDDLE_LEFT | LOWER_LEFT | LOWER_RIGHT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_LEFT | LOWER_LEFT | LOWER_RIGHT,
MIDDLE_RIGHT | LOWER_LEFT | LOWER_RIGHT,
UPPER_LEFT | MIDDLE_RIGHT | LOWER_LEFT | LOWER_RIGHT,
UPPER_RIGHT | MIDDLE_RIGHT | LOWER_LEFT | LOWER_RIGHT,
UPPER_LEFT | UPPER_RIGHT | MIDDLE_RIGHT | LOWER_LEFT | LOWER_RIGHT,
MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_LEFT | LOWER_RIGHT,
UPPER_LEFT | MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_LEFT | LOWER_RIGHT,
UPPER_RIGHT | MIDDLE_LEFT | MIDDLE_RIGHT | LOWER_LEFT | LOWER_RIGHT,
};
xassert(wc >= 0x1fb00 && wc <= 0x1fb3b);
const size_t idx = wc - 0x1fb00;
xassert(idx < ALEN(matrix));
uint8_t encoded = matrix[idx];
if (encoded & UPPER_LEFT)
sextant_upper_left(buf);
if (encoded & MIDDLE_LEFT)
sextant_middle_left(buf);
if (encoded & LOWER_LEFT)
sextant_lower_left(buf);
if (encoded & UPPER_RIGHT)
sextant_upper_right(buf);
if (encoded & MIDDLE_RIGHT)
sextant_middle_right(buf);
if (encoded & LOWER_RIGHT)
sextant_lower_right(buf);
}
static void NOINLINE
draw_wedge_triangle(struct buf *buf, wchar_t wc)
{
const int width = buf->width;
const int height = buf->height;
int halfs0 = buf->x_halfs[0];
int halfs1 = buf->x_halfs[1];
int thirds0 = buf->y_thirds[0];
int thirds1 = buf->y_thirds[1];
int p1_x, p1_y, p2_x, p2_y, p3_x, p3_y;
switch (wc) {
case 0x1fb3c: /* 🬼 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = thirds1; p2_y = p3_y = height;
break;
case 0x1fb52: /* 🭒 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = thirds1; p2_y = p3_y = height;
break;
case 0x1fb3d: /* 🬽 */
p1_x = p2_x = 0; p3_x = width;
p1_y = thirds1; p2_y = p3_y = height;
break;
case 0x1fb53: /* 🭓 */
p1_x = p2_x = 0; p3_x = width;
p1_y = thirds1; p2_y = p3_y = height;
break;
case 0x1fb3e: /* 🬾 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = thirds0; p2_y = p3_y = height;
break;
case 0x1fb54: /* 🭔 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = thirds0; p2_y = p3_y = height;
break;
case 0x1fb3f: /* 🬿 */
p1_x = p2_x = 0; p3_x = width;
p1_y = thirds0; p2_y = p3_y = height;
break;
case 0x1fb55: /* 🭕 */
p1_x = p2_x = 0; p3_x = width;
p1_y = thirds0; p2_y = p3_y = height;
break;
case 0x1fb40: /* 🭀 */
case 0x1fb56: /* 🭖 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = 0; p2_y = p3_y = height;
break;
case 0x1fb47: /* 🭇 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = thirds1; p2_y = p3_y = height;
break;
case 0x1fb5d: /* 🭝 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = thirds1; p2_y = p3_y = height;
break;
case 0x1fb48: /* 🭈 */
p1_x = p2_x = width; p3_x = 0;
p1_y = thirds1; p2_y = p3_y = height;
break;
case 0x1fb5e: /* 🭞 */
p1_x = p2_x = width; p3_x = 0;
p1_y = thirds1; p2_y = p3_y = height;
break;
case 0x1fb49: /* 🭉 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = thirds0; p2_y = p3_y = height;
break;
case 0x1fb5f: /* 🭟 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = thirds0; p2_y = p3_y = height;
break;
case 0x1fb4a: /* 🭊 */
p1_x = p2_x = width; p3_x = 0;
p1_y = thirds0; p2_y = p3_y = height;
break;
case 0x1fb60: /* 🭠 */
p1_x = p2_x = width; p3_x = 0;
p1_y = thirds0; p2_y = p3_y = height;
break;
case 0x1fb4b: /* 🭋 */
case 0x1fb61: /* 🭡 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = 0; p2_y = p3_y = height;
break;
case 0x1fb57: /* 🭗 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = p3_y = 0; p2_y = thirds0;
break;
case 0x1fb41: /* 🭁 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = p3_y = 0; p2_y = thirds0;
break;
case 0x1fb58: /* 🭘 */
p1_x = p2_x = 0; p3_x = width;
p1_y = p3_y = 0; p2_y = thirds0;
break;
case 0x1fb42: /* 🭂 */
p1_x = p2_x = 0; p3_x = width;
p1_y = p3_y = 0; p2_y = thirds0;
break;
case 0x1fb59: /* 🭙 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = p3_y = 0; p2_y = thirds1;
break;
case 0x1fb43: /* 🭃 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = p3_y = 0; p2_y = thirds1;
break;
case 0x1fb5a: /* 🭚 */
p1_x = p2_x = 0; p3_x = width;
p1_y = p3_y = 0; p2_y = thirds1;
break;
case 0x1fb44: /* 🭄 */
p1_x = p2_x = 0; p3_x = width;
p1_y = p3_y = 0; p2_y = thirds1;
break;
case 0x1fb5b: /* 🭛 */
case 0x1fb45: /* 🭅 */
p1_x = p2_x = 0; p3_x = halfs0;
p1_y = p3_y = 0; p2_y = height;
break;
case 0x1fb62: /* 🭢 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = p3_y = 0; p2_y = thirds0;
break;
case 0x1fb4c: /* 🭌 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = p3_y = 0; p2_y = thirds0;
break;
case 0x1fb63: /* 🭣 */
p1_x = p2_x = width; p3_x = 0;
p1_y = p3_y = 0; p2_y = thirds0;
break;
case 0x1fb4d: /* 🭍 */
p1_x = p2_x = width; p3_x = 0;
p1_y = p3_y = 0; p2_y = thirds0;
break;
case 0x1fb64: /* 🭤 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = p3_y = 0; p2_y = thirds1;
break;
case 0x1fb4e: /* 🭎 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = p3_y = 0; p2_y = thirds1;
break;
case 0x1fb65: /* 🭥 */
p1_x = p2_x = width; p3_x = 0;
p1_y = p3_y = 0; p2_y = thirds1;
break;
case 0x1fb4f: /* 🭏 */
p1_x = p2_x = width; p3_x = 0;
p1_y = p3_y = 0; p2_y = thirds1;
break;
case 0x1fb66: /* 🭦 */
case 0x1fb50: /* 🭐 */
p1_x = p2_x = width; p3_x = halfs1;
p1_y = p3_y = 0; p2_y = height;
break;
case 0x1fb46: /* 🭆 */
p1_x = 0; p1_y = thirds1;
p2_x = width; p2_y = thirds0;
p3_x = width; p3_y = p1_y;
break;
case 0x1fb51: /* 🭑 */
p1_x = 0; p1_y = thirds0;
p2_x = 0; p2_y = thirds1;
p3_x = width; p3_y = p2_y;
break;
case 0x1fb5c: /* 🭜 */
p1_x = 0; p1_y = thirds0;
p2_x = 0; p2_y = thirds1;
p3_x = width; p3_y = p1_y;
break;
case 0x1fb67: /* 🭧 */
p1_x = 0; p1_y = thirds0;
p2_x = width; p2_y = p1_y;
p3_x = width; p3_y = thirds1;
break;
case 0x1fb6c: /* 🭬 */
case 0x1fb68: /* 🭨 */
p1_x = 0; p1_y = 0;
p2_x = halfs0; p2_y = height / 2;
p3_x = 0; p3_y = height;
break;
case 0x1fb6d: /* 🭭 */
case 0x1fb69: /* 🭩 */
p1_x = 0; p1_y = 0;
p2_x = halfs1; p2_y = height / 2;
p3_x = width; p3_y = 0;
break;
case 0x1fb6e: /* 🭮 */
case 0x1fb6a: /* 🭪 */
p1_x = width; p1_y = 0;
p2_x = halfs1; p2_y = height / 2;
p3_x = width; p3_y = height;
break;
case 0x1fb6f: /* 🭯 */
case 0x1fb6b: /* 🭫 */
p1_x = 0; p1_y = height;
p2_x = halfs1; p2_y = height / 2;
p3_x = width; p3_y = height;
break;
default:
BUG("unimplemented Unicode codepoint");
break;
}
const pixman_triangle_t tri = {
.p1 = {.x = pixman_int_to_fixed(p1_x), .y = pixman_int_to_fixed(p1_y)},
.p2 = {.x = pixman_int_to_fixed(p2_x), .y = pixman_int_to_fixed(p2_y)},
.p3 = {.x = pixman_int_to_fixed(p3_x), .y = pixman_int_to_fixed(p3_y)},
};
pixman_image_t *src = pixman_image_create_solid_fill(&white);
pixman_composite_triangles(
PIXMAN_OP_OVER, src, buf->pix, buf->format, 0, 0, 0, 0, 1, &tri);
pixman_image_unref(src);
}
static void NOINLINE
draw_wedge_triangle_inverted(struct buf *buf, wchar_t wc)
{
draw_wedge_triangle(buf, wc);
pixman_image_t *src = pixman_image_create_solid_fill(&white);
pixman_image_composite(PIXMAN_OP_OUT, src, NULL, buf->pix, 0, 0, 0, 0, 0, 0, buf->width, buf->height);
pixman_image_unref(src);
}
static void NOINLINE
draw_wedge_triangle_and_box(struct buf *buf, wchar_t wc)
{
draw_wedge_triangle(buf, wc);
const int width = buf->width;
const int height = buf->height;
pixman_box32_t box;
switch (wc) {
case 0x1fb46:
case 0x1fb51:
box = (pixman_box32_t){
.x1 = 0, .y1 = buf->y_thirds[1],
.x2 = width, .y2 = height,
};
break;
case 0x1fb5c:
case 0x1fb67:
box = (pixman_box32_t){
.x1 = 0, .y1 = 0,
.x2 = width, .y2 = buf->y_thirds[0],
};
break;
}
pixman_image_fill_boxes(PIXMAN_OP_SRC, buf->pix, &white, 1, &box);
}
static void
draw_left_and_lower_one_eighth_block(struct buf *buf)
{
draw_left_one_eighth_block(buf);
draw_lower_one_eighth_block(buf);
}
static void
draw_left_and_upper_one_eighth_block(struct buf *buf)
{
draw_left_one_eighth_block(buf);
draw_upper_one_eighth_block(buf);
}
static void
draw_right_and_upper_one_eighth_block(struct buf *buf)
{
draw_right_one_eighth_block(buf);
draw_upper_one_eighth_block(buf);
}
static void
draw_right_and_lower_one_eighth_block(struct buf *buf)
{
draw_right_one_eighth_block(buf);
draw_lower_one_eighth_block(buf);
}
static void
draw_upper_and_lower_one_eighth_block(struct buf *buf)
{
draw_upper_one_eighth_block(buf);
draw_lower_one_eighth_block(buf);
}
static void
draw_horizontal_one_eighth_1358_block(struct buf *buf)
{
draw_upper_one_eighth_block(buf);
draw_horizontal_one_eighth_block_3(buf);
draw_horizontal_one_eighth_block_5(buf);
draw_lower_one_eighth_block(buf);
}
static void
draw_right_one_quarter_block(struct buf *buf)
{
rect(buf->width - round(buf->width / 4.), 0, buf->width, buf->height);
}
static void
draw_right_three_eighths_block(struct buf *buf)
{
rect(buf->width - round(3. * buf->width / 8.), 0, buf->width, buf->height);
}
static void
draw_right_five_eighths_block(struct buf *buf)
{
rect(buf->width - round(5. * buf->width / 8.), 0, buf->width, buf->height);
}
static void
draw_right_three_quarters_block(struct buf *buf)
{
rect(buf->width - round(3. * buf->width / 4.), 0, buf->width, buf->height);
}
static void
draw_right_seven_eighths_block(struct buf *buf)
{
rect(buf->width - round(7. * buf->width / 8.), 0, buf->width, buf->height);
}
static void
draw_glyph(struct buf *buf, wchar_t wc)
{
IGNORE_WARNING("-Wpedantic")
switch (wc) {
case 0x2500: draw_box_drawings_light_horizontal(buf); break;
case 0x2501: draw_box_drawings_heavy_horizontal(buf); break;
case 0x2502: draw_box_drawings_light_vertical(buf); break;
case 0x2503: draw_box_drawings_heavy_vertical(buf); break;
case 0x2504: draw_box_drawings_light_triple_dash_horizontal(buf); break;
case 0x2505: draw_box_drawings_heavy_triple_dash_horizontal(buf); break;
case 0x2506: draw_box_drawings_light_triple_dash_vertical(buf); break;
case 0x2507: draw_box_drawings_heavy_triple_dash_vertical(buf); break;
case 0x2508: draw_box_drawings_light_quadruple_dash_horizontal(buf); break;
case 0x2509: draw_box_drawings_heavy_quadruple_dash_horizontal(buf); break;
case 0x250a: draw_box_drawings_light_quadruple_dash_vertical(buf); break;
case 0x250b: draw_box_drawings_heavy_quadruple_dash_vertical(buf); break;
case 0x250c: draw_box_drawings_light_down_and_right(buf); break;
case 0x250d: draw_box_drawings_down_light_and_right_heavy(buf); break;
case 0x250e: draw_box_drawings_down_heavy_and_right_light(buf); break;
case 0x250f: draw_box_drawings_heavy_down_and_right(buf); break;
case 0x2510: draw_box_drawings_light_down_and_left(buf); break;
case 0x2511: draw_box_drawings_down_light_and_left_heavy(buf); break;
case 0x2512: draw_box_drawings_down_heavy_and_left_light(buf); break;
case 0x2513: draw_box_drawings_heavy_down_and_left(buf); break;
case 0x2514: draw_box_drawings_light_up_and_right(buf); break;
case 0x2515: draw_box_drawings_up_light_and_right_heavy(buf); break;
case 0x2516: draw_box_drawings_up_heavy_and_right_light(buf); break;
case 0x2517: draw_box_drawings_heavy_up_and_right(buf); break;
case 0x2518: draw_box_drawings_light_up_and_left(buf); break;
case 0x2519: draw_box_drawings_up_light_and_left_heavy(buf); break;
case 0x251a: draw_box_drawings_up_heavy_and_left_light(buf); break;
case 0x251b: draw_box_drawings_heavy_up_and_left(buf); break;
case 0x251c: draw_box_drawings_light_vertical_and_right(buf); break;
case 0x251d: draw_box_drawings_vertical_light_and_right_heavy(buf); break;
case 0x251e: draw_box_drawings_up_heavy_and_right_down_light(buf); break;
case 0x251f: draw_box_drawings_down_heavy_and_right_up_light(buf); break;
case 0x2520: draw_box_drawings_vertical_heavy_and_right_light(buf); break;
case 0x2521: draw_box_drawings_down_light_and_right_up_heavy(buf); break;
case 0x2522: draw_box_drawings_up_light_and_right_down_heavy(buf); break;
case 0x2523: draw_box_drawings_heavy_vertical_and_right(buf); break;
case 0x2524: draw_box_drawings_light_vertical_and_left(buf); break;
case 0x2525: draw_box_drawings_vertical_light_and_left_heavy(buf); break;
case 0x2526: draw_box_drawings_up_heavy_and_left_down_light(buf); break;
case 0x2527: draw_box_drawings_down_heavy_and_left_up_light(buf); break;
case 0x2528: draw_box_drawings_vertical_heavy_and_left_light(buf); break;
case 0x2529: draw_box_drawings_down_light_and_left_up_heavy(buf); break;
case 0x252a: draw_box_drawings_up_light_and_left_down_heavy(buf); break;
case 0x252b: draw_box_drawings_heavy_vertical_and_left(buf); break;
case 0x252c: draw_box_drawings_light_down_and_horizontal(buf); break;
case 0x252d: draw_box_drawings_left_heavy_and_right_down_light(buf); break;
case 0x252e: draw_box_drawings_right_heavy_and_left_down_light(buf); break;
case 0x252f: draw_box_drawings_down_light_and_horizontal_heavy(buf); break;
case 0x2530: draw_box_drawings_down_heavy_and_horizontal_light(buf); break;
case 0x2531: draw_box_drawings_right_light_and_left_down_heavy(buf); break;
case 0x2532: draw_box_drawings_left_light_and_right_down_heavy(buf); break;
case 0x2533: draw_box_drawings_heavy_down_and_horizontal(buf); break;
case 0x2534: draw_box_drawings_light_up_and_horizontal(buf); break;
case 0x2535: draw_box_drawings_left_heavy_and_right_up_light(buf); break;
case 0x2536: draw_box_drawings_right_heavy_and_left_up_light(buf); break;
case 0x2537: draw_box_drawings_up_light_and_horizontal_heavy(buf); break;
case 0x2538: draw_box_drawings_up_heavy_and_horizontal_light(buf); break;
case 0x2539: draw_box_drawings_right_light_and_left_up_heavy(buf); break;
case 0x253a: draw_box_drawings_left_light_and_right_up_heavy(buf); break;
case 0x253b: draw_box_drawings_heavy_up_and_horizontal(buf); break;
case 0x253c: draw_box_drawings_light_vertical_and_horizontal(buf); break;
case 0x253d: draw_box_drawings_left_heavy_and_right_vertical_light(buf); break;
case 0x253e: draw_box_drawings_right_heavy_and_left_vertical_light(buf); break;
case 0x253f: draw_box_drawings_vertical_light_and_horizontal_heavy(buf); break;
case 0x2540: draw_box_drawings_up_heavy_and_down_horizontal_light(buf); break;
case 0x2541: draw_box_drawings_down_heavy_and_up_horizontal_light(buf); break;
case 0x2542: draw_box_drawings_vertical_heavy_and_horizontal_light(buf); break;
case 0x2543: draw_box_drawings_left_up_heavy_and_right_down_light(buf); break;
case 0x2544: draw_box_drawings_right_up_heavy_and_left_down_light(buf); break;
case 0x2545: draw_box_drawings_left_down_heavy_and_right_up_light(buf); break;
case 0x2546: draw_box_drawings_right_down_heavy_and_left_up_light(buf); break;
case 0x2547: draw_box_drawings_down_light_and_up_horizontal_heavy(buf); break;
case 0x2548: draw_box_drawings_up_light_and_down_horizontal_heavy(buf); break;
case 0x2549: draw_box_drawings_right_light_and_left_vertical_heavy(buf); break;
case 0x254a: draw_box_drawings_left_light_and_right_vertical_heavy(buf); break;
case 0x254b: draw_box_drawings_heavy_vertical_and_horizontal(buf); break;
case 0x254c: draw_box_drawings_light_double_dash_horizontal(buf); break;
case 0x254d: draw_box_drawings_heavy_double_dash_horizontal(buf); break;
case 0x254e: draw_box_drawings_light_double_dash_vertical(buf); break;
case 0x254f: draw_box_drawings_heavy_double_dash_vertical(buf); break;
case 0x2550: draw_box_drawings_double_horizontal(buf); break;
case 0x2551: draw_box_drawings_double_vertical(buf); break;
case 0x2552: draw_box_drawings_down_single_and_right_double(buf); break;
case 0x2553: draw_box_drawings_down_double_and_right_single(buf); break;
case 0x2554: draw_box_drawings_double_down_and_right(buf); break;
case 0x2555: draw_box_drawings_down_single_and_left_double(buf); break;
case 0x2556: draw_box_drawings_down_double_and_left_single(buf); break;
case 0x2557: draw_box_drawings_double_down_and_left(buf); break;
case 0x2558: draw_box_drawings_up_single_and_right_double(buf); break;
case 0x2559: draw_box_drawings_up_double_and_right_single(buf); break;
case 0x255a: draw_box_drawings_double_up_and_right(buf); break;
case 0x255b: draw_box_drawings_up_single_and_left_double(buf); break;
case 0x255c: draw_box_drawings_up_double_and_left_single(buf); break;
case 0x255d: draw_box_drawings_double_up_and_left(buf); break;
case 0x255e: draw_box_drawings_vertical_single_and_right_double(buf); break;
case 0x255f: draw_box_drawings_vertical_double_and_right_single(buf); break;
case 0x2560: draw_box_drawings_double_vertical_and_right(buf); break;
case 0x2561: draw_box_drawings_vertical_single_and_left_double(buf); break;
case 0x2562: draw_box_drawings_vertical_double_and_left_single(buf); break;
case 0x2563: draw_box_drawings_double_vertical_and_left(buf); break;
case 0x2564: draw_box_drawings_down_single_and_horizontal_double(buf); break;
case 0x2565: draw_box_drawings_down_double_and_horizontal_single(buf); break;
case 0x2566: draw_box_drawings_double_down_and_horizontal(buf); break;
case 0x2567: draw_box_drawings_up_single_and_horizontal_double(buf); break;
case 0x2568: draw_box_drawings_up_double_and_horizontal_single(buf); break;
case 0x2569: draw_box_drawings_double_up_and_horizontal(buf); break;
case 0x256a: draw_box_drawings_vertical_single_and_horizontal_double(buf); break;
case 0x256b: draw_box_drawings_vertical_double_and_horizontal_single(buf); break;
case 0x256c: draw_box_drawings_double_vertical_and_horizontal(buf); break;
case 0x256d ... 0x2570: draw_box_drawings_light_arc(buf, wc); break;
case 0x2571: draw_box_drawings_light_diagonal_upper_right_to_lower_left(buf); break;
case 0x2572: draw_box_drawings_light_diagonal_upper_left_to_lower_right(buf); break;
case 0x2573: draw_box_drawings_light_diagonal_cross(buf); break;
case 0x2574: draw_box_drawings_light_left(buf); break;
case 0x2575: draw_box_drawings_light_up(buf); break;
case 0x2576: draw_box_drawings_light_right(buf); break;
case 0x2577: draw_box_drawings_light_down(buf); break;
case 0x2578: draw_box_drawings_heavy_left(buf); break;
case 0x2579: draw_box_drawings_heavy_up(buf); break;
case 0x257a: draw_box_drawings_heavy_right(buf); break;
case 0x257b: draw_box_drawings_heavy_down(buf); break;
case 0x257c: draw_box_drawings_light_left_and_heavy_right(buf); break;
case 0x257d: draw_box_drawings_light_up_and_heavy_down(buf); break;
case 0x257e: draw_box_drawings_heavy_left_and_light_right(buf); break;
case 0x257f: draw_box_drawings_heavy_up_and_light_down(buf); break;
case 0x2580: draw_upper_half_block(buf); break;
case 0x2581: draw_lower_one_eighth_block(buf); break;
case 0x2582: draw_lower_one_quarter_block(buf); break;
case 0x2583: draw_lower_three_eighths_block(buf); break;
case 0x2584: draw_lower_half_block(buf); break;
case 0x2585: draw_lower_five_eighths_block(buf); break;
case 0x2586: draw_lower_three_quarters_block(buf); break;
case 0x2587: draw_lower_seven_eighths_block(buf); break;
case 0x2588: draw_full_block(buf); break;
case 0x2589: draw_left_seven_eighths_block(buf); break;
case 0x258a: draw_left_three_quarters_block(buf); break;
case 0x258b: draw_left_five_eighths_block(buf); break;
case 0x258c: draw_left_half_block(buf); break;
case 0x258d: draw_left_three_eighths_block(buf); break;
case 0x258e: draw_left_one_quarter_block(buf); break;
case 0x258f: draw_left_one_eighth_block(buf); break;
case 0x2590: draw_right_half_block(buf); break;
case 0x2591: draw_light_shade(buf); break;
case 0x2592: draw_medium_shade(buf); break;
case 0x2593: draw_dark_shade(buf); break;
case 0x2594: draw_upper_one_eighth_block(buf); break;
case 0x2595: draw_right_one_eighth_block(buf); break;
case 0x2596 ... 0x259f: draw_quadrant(buf, wc); break;
case 0x2800 ... 0x28ff: draw_braille(buf, wc); break;
case 0x1fb00 ... 0x1fb3b: draw_sextant(buf, wc); break;
case 0x1fb3c ... 0x1fb40:
case 0x1fb47 ... 0x1fb4b:
case 0x1fb57 ... 0x1fb5b:
case 0x1fb62 ... 0x1fb66:
case 0x1fb6c ... 0x1fb6f:
draw_wedge_triangle(buf, wc);
break;
case 0x1fb41 ... 0x1fb45:
case 0x1fb4c ... 0x1fb50:
case 0x1fb52 ... 0x1fb56:
case 0x1fb5d ... 0x1fb61:
case 0x1fb68 ... 0x1fb6b:
draw_wedge_triangle_inverted(buf, wc);
break;
case 0x1fb46:
case 0x1fb51:
case 0x1fb5c:
case 0x1fb67:
draw_wedge_triangle_and_box(buf, wc);
break;
case 0x1fb9a:
draw_wedge_triangle(buf, 0x1fb6d);
draw_wedge_triangle(buf, 0x1fb6f);
break;
case 0x1fb9b:
draw_wedge_triangle(buf, 0x1fb6c);
draw_wedge_triangle(buf, 0x1fb6e);
break;
case 0x1fb70: draw_vertical_one_eighth_block_2(buf); break;
case 0x1fb71: draw_vertical_one_eighth_block_3(buf); break;
case 0x1fb72: draw_vertical_one_eighth_block_4(buf); break;
case 0x1fb73: draw_vertical_one_eighth_block_5(buf); break;
case 0x1fb74: draw_vertical_one_eighth_block_6(buf); break;
case 0x1fb75: draw_vertical_one_eighth_block_7(buf); break;
case 0x1fb76: draw_horizontal_one_eighth_block_2(buf); break;
case 0x1fb77: draw_horizontal_one_eighth_block_3(buf); break;
case 0x1fb78: draw_horizontal_one_eighth_block_4(buf); break;
case 0x1fb79: draw_horizontal_one_eighth_block_5(buf); break;
case 0x1fb7a: draw_horizontal_one_eighth_block_6(buf); break;
case 0x1fb7b: draw_horizontal_one_eighth_block_7(buf); break;
case 0x1fb82: draw_upper_one_quarter_block(buf); break;
case 0x1fb83: draw_upper_three_eighths_block(buf); break;
case 0x1fb84: draw_upper_five_eighths_block(buf); break;
case 0x1fb85: draw_upper_three_quarters_block(buf); break;
case 0x1fb86: draw_upper_seven_eighths_block(buf); break;
case 0x1fb7c: draw_left_and_lower_one_eighth_block(buf); break;
case 0x1fb7d: draw_left_and_upper_one_eighth_block(buf); break;
case 0x1fb7e: draw_right_and_upper_one_eighth_block(buf); break;
case 0x1fb7f: draw_right_and_lower_one_eighth_block(buf); break;
case 0x1fb80: draw_upper_and_lower_one_eighth_block(buf); break;
case 0x1fb81: draw_horizontal_one_eighth_1358_block(buf); break;
case 0x1fb87: draw_right_one_quarter_block(buf); break;
case 0x1fb88: draw_right_three_eighths_block(buf); break;
case 0x1fb89: draw_right_five_eighths_block(buf); break;
case 0x1fb8a: draw_right_three_quarters_block(buf); break;
case 0x1fb8b: draw_right_seven_eighths_block(buf); break;
}
UNIGNORE_WARNINGS
}
struct fcft_glyph * COLD
box_drawing(const struct terminal *term, wchar_t wc)
{
int width = term->cell_width;
int height = term->cell_height;
pixman_format_code_t fmt =
term->fonts[0]->antialias ? PIXMAN_a8 : PIXMAN_a1;
int stride = stride_for_format_and_width(fmt, width);
uint8_t *data = xcalloc(height * stride, 1);
pixman_image_t *pix = pixman_image_create_bits_no_clear(
fmt, width, height, (uint32_t*)data, stride);
if (pix == NULL) {
errno = ENOMEM;
perror(__func__);
abort();
}
double dpi = term_font_sized_by_dpi(term, term->scale) ? term->font_dpi : 96.;
double scale = term_font_sized_by_scale(term, term->scale) ? term->scale : 1.;
double cell_size = sqrt(pow(term->cell_width, 2) + pow(term->cell_height, 2));
int base_thickness =
(double)term->conf->tweak.box_drawing_base_thickness * scale * cell_size * dpi / 72.0;
base_thickness = max(base_thickness, 1);
int y0 = 0, y1 = 0;
switch (height % 3) {
case 0:
y0 = height / 3;
y1 = 2 * height / 3;
break;
case 1:
y0 = height / 3;
y1 = 2 * height / 3 + 1;
break;
case 2:
y0 = height / 3 + 1;
y1 = y0 + height / 3;
break;
}
struct buf buf = {
.data = data,
.pix = pix,
.format = fmt,
.width = width,
.height = height,
.stride = stride,
.solid_shades = term->conf->tweak.box_drawing_solid_shades,
.thickness = {
[LIGHT] = _thickness(base_thickness, LIGHT),
[HEAVY] = _thickness(base_thickness, HEAVY),
},
/* Overlap when width is odd */
.x_halfs = {
round(width / 2.), /* Endpoint first half */
width / 2, /* Startpoint second half */
},
.y_thirds = {
y0, /* Endpoint first third, start point second third */
y1, /* Endpoint second third, start point last third */
},
};
LOG_DBG("LIGHT=%d, HEAVY=%d",
_thickness(&buf, LIGHT), _thickness(&buf, HEAVY));
draw_glyph(&buf, wc);
struct fcft_glyph *glyph = xmalloc(sizeof(*glyph));
*glyph = (struct fcft_glyph){
.wc = wc,
.cols = 1,
.pix = buf.pix,
.x = -term->font_x_ofs,
.y = term->font_y_ofs + term->fonts[0]->ascent,
.width = width,
.height = height,
.advance = {
.x = width,
.y = height,
},
};
return glyph;
}
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