mirror of
https://codeberg.org/dwl/dwl.git
synced 2025-10-31 12:04:16 +00:00
285 lines
6.4 KiB
C
285 lines
6.4 KiB
C
/*
|
|
* drwl - https://codeberg.org/sewn/drwl
|
|
* See LICENSE.drwl file for copyright and license details.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <stdlib.h>
|
|
#include <fcft/fcft.h>
|
|
#include <pixman-1/pixman.h>
|
|
|
|
#define BETWEEN(X, A, B) ((A) <= (X) && (X) <= (B))
|
|
|
|
enum { ColFg, ColBg, ColBorder }; /* colorscheme index */
|
|
|
|
typedef struct {
|
|
pixman_image_t *pix;
|
|
struct fcft_font *font;
|
|
uint32_t *scheme;
|
|
} Drwl;
|
|
|
|
#define UTF_INVALID 0xFFFD
|
|
#define UTF_SIZ 4
|
|
|
|
static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
|
|
static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
|
|
static const uint32_t utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
|
|
static const uint32_t utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
|
|
|
|
static inline uint32_t
|
|
utf8decodebyte(const char c, size_t *i)
|
|
{
|
|
for (*i = 0; *i < (UTF_SIZ + 1); ++(*i))
|
|
if (((unsigned char)c & utfmask[*i]) == utfbyte[*i])
|
|
return (unsigned char)c & ~utfmask[*i];
|
|
return 0;
|
|
}
|
|
|
|
static inline size_t
|
|
utf8decode(const char *c, uint32_t *u)
|
|
{
|
|
size_t i, j, len, type;
|
|
uint32_t udecoded;
|
|
|
|
*u = UTF_INVALID;
|
|
udecoded = utf8decodebyte(c[0], &len);
|
|
if (!BETWEEN(len, 1, UTF_SIZ))
|
|
return 1;
|
|
for (i = 1, j = 1; i < UTF_SIZ && j < len; ++i, ++j) {
|
|
udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
|
|
if (type)
|
|
return j;
|
|
}
|
|
if (j < len)
|
|
return 0;
|
|
*u = udecoded;
|
|
if (!BETWEEN(*u, utfmin[len], utfmax[len]) || BETWEEN(*u, 0xD800, 0xDFFF))
|
|
*u = UTF_INVALID;
|
|
for (i = 1; *u > utfmax[i]; ++i)
|
|
;
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
drwl_init(void)
|
|
{
|
|
fcft_set_scaling_filter(FCFT_SCALING_FILTER_LANCZOS3);
|
|
return fcft_init(FCFT_LOG_COLORIZE_AUTO, 0, FCFT_LOG_CLASS_ERROR);
|
|
}
|
|
|
|
static Drwl *
|
|
drwl_create(void)
|
|
{
|
|
Drwl *drwl;
|
|
|
|
if (!(drwl = calloc(1, sizeof(Drwl))))
|
|
return NULL;
|
|
|
|
return drwl;
|
|
}
|
|
|
|
static void
|
|
drwl_setfont(Drwl *drwl, struct fcft_font *font)
|
|
{
|
|
if (drwl)
|
|
drwl->font = font;
|
|
}
|
|
|
|
static struct fcft_font *
|
|
drwl_load_font(Drwl *drwl, size_t fontcount,
|
|
const char *fonts[static fontcount], const char *attributes)
|
|
{
|
|
struct fcft_font *font = fcft_from_name(fontcount, fonts, attributes);
|
|
if (drwl)
|
|
drwl_setfont(drwl, font);
|
|
return font;
|
|
}
|
|
|
|
static void
|
|
drwl_destroy_font(struct fcft_font *font)
|
|
{
|
|
fcft_destroy(font);
|
|
}
|
|
|
|
static inline pixman_color_t
|
|
convert_color(uint32_t clr)
|
|
{
|
|
return (pixman_color_t){
|
|
((clr >> 24) & 0xFF) * 0x101,
|
|
((clr >> 16) & 0xFF) * 0x101,
|
|
((clr >> 8) & 0xFF) * 0x101,
|
|
(clr & 0xFF) * 0x101
|
|
};
|
|
}
|
|
|
|
static void
|
|
drwl_setscheme(Drwl *drwl, uint32_t *scm)
|
|
{
|
|
if (drwl)
|
|
drwl->scheme = scm;
|
|
}
|
|
|
|
static inline int
|
|
drwl_stride(unsigned int width)
|
|
{
|
|
return (((PIXMAN_FORMAT_BPP(PIXMAN_a8r8g8b8) * width + 7) / 8 + 4 - 1) & -4);
|
|
}
|
|
|
|
static void
|
|
drwl_prepare_drawing(Drwl *drwl, unsigned int w, unsigned int h,
|
|
uint32_t *bits, int stride)
|
|
{
|
|
pixman_region32_t clip;
|
|
|
|
if (!drwl)
|
|
return;
|
|
|
|
drwl->pix = pixman_image_create_bits_no_clear(
|
|
PIXMAN_a8r8g8b8, w, h, bits, stride);
|
|
pixman_region32_init_rect(&clip, 0, 0, w, h);
|
|
pixman_image_set_clip_region32(drwl->pix, &clip);
|
|
pixman_region32_fini(&clip);
|
|
}
|
|
|
|
static void
|
|
drwl_rect(Drwl *drwl,
|
|
int x, int y, unsigned int w, unsigned int h,
|
|
int filled, int invert)
|
|
{
|
|
pixman_color_t clr;
|
|
if (!drwl || !drwl->scheme || !drwl->pix)
|
|
return;
|
|
|
|
clr = convert_color(drwl->scheme[invert ? ColBg : ColFg]);
|
|
if (filled)
|
|
pixman_image_fill_rectangles(PIXMAN_OP_SRC, drwl->pix, &clr, 1,
|
|
&(pixman_rectangle16_t){x, y, w, h});
|
|
else
|
|
pixman_image_fill_rectangles(PIXMAN_OP_SRC, drwl->pix, &clr, 4,
|
|
(pixman_rectangle16_t[4]){
|
|
{ x, y, w, 1 },
|
|
{ x, y + h - 1, w, 1 },
|
|
{ x, y, 1, h },
|
|
{ x + w - 1, y, 1, h }});
|
|
}
|
|
|
|
static int
|
|
drwl_text(Drwl *drwl,
|
|
int x, int y, unsigned int w, unsigned int h,
|
|
unsigned int lpad, const char *text, int invert)
|
|
{
|
|
int ty;
|
|
int utf8charlen, render = x || y || w || h;
|
|
long x_kern;
|
|
uint32_t cp = 0, last_cp = 0;
|
|
pixman_color_t clr;
|
|
pixman_image_t *fg_pix = NULL;
|
|
int noellipsis = 0;
|
|
const struct fcft_glyph *glyph, *eg;
|
|
int fcft_subpixel_mode = FCFT_SUBPIXEL_DEFAULT;
|
|
|
|
if (!drwl || (render && (!drwl->scheme || !w || !drwl->pix)) || !text || !drwl->font)
|
|
return 0;
|
|
|
|
if (!render) {
|
|
w = invert ? invert : ~invert;
|
|
} else {
|
|
clr = convert_color(drwl->scheme[invert ? ColBg : ColFg]);
|
|
fg_pix = pixman_image_create_solid_fill(&clr);
|
|
|
|
drwl_rect(drwl, x, y, w, h, 1, !invert);
|
|
|
|
x += lpad;
|
|
w -= lpad;
|
|
}
|
|
|
|
if (render && (drwl->scheme[ColBg] & 0xFF) != 0xFF)
|
|
fcft_subpixel_mode = FCFT_SUBPIXEL_NONE;
|
|
|
|
// U+2026 == …
|
|
eg = fcft_rasterize_char_utf32(drwl->font, 0x2026, fcft_subpixel_mode);
|
|
|
|
while (*text) {
|
|
utf8charlen = utf8decode(text, &cp);
|
|
|
|
glyph = fcft_rasterize_char_utf32(drwl->font, cp, fcft_subpixel_mode);
|
|
if (!glyph)
|
|
continue;
|
|
|
|
x_kern = 0;
|
|
if (last_cp)
|
|
fcft_kerning(drwl->font, last_cp, cp, &x_kern, NULL);
|
|
last_cp = cp;
|
|
|
|
ty = y + (h - drwl->font->height) / 2 + drwl->font->ascent;
|
|
|
|
/* draw ellipsis if remaining text doesn't fit */
|
|
if (!noellipsis && x_kern + glyph->advance.x + eg->advance.x > w && *(text + 1) != '\0') {
|
|
if (drwl_text(drwl, 0, 0, 0, 0, 0, text, 0)
|
|
- glyph->advance.x < eg->advance.x) {
|
|
noellipsis = 1;
|
|
} else {
|
|
w -= eg->advance.x;
|
|
pixman_image_composite32(
|
|
PIXMAN_OP_OVER, fg_pix, eg->pix, drwl->pix, 0, 0, 0, 0,
|
|
x + eg->x, ty - eg->y, eg->width, eg->height);
|
|
}
|
|
}
|
|
|
|
if ((x_kern + glyph->advance.x) > w)
|
|
break;
|
|
|
|
x += x_kern;
|
|
|
|
if (render && pixman_image_get_format(glyph->pix) == PIXMAN_a8r8g8b8)
|
|
// pre-rendered glyphs (eg. emoji)
|
|
pixman_image_composite32(
|
|
PIXMAN_OP_OVER, glyph->pix, NULL, drwl->pix, 0, 0, 0, 0,
|
|
x + glyph->x, ty - glyph->y, glyph->width, glyph->height);
|
|
else if (render)
|
|
pixman_image_composite32(
|
|
PIXMAN_OP_OVER, fg_pix, glyph->pix, drwl->pix, 0, 0, 0, 0,
|
|
x + glyph->x, ty - glyph->y, glyph->width, glyph->height);
|
|
|
|
text += utf8charlen;
|
|
x += glyph->advance.x;
|
|
w -= glyph->advance.x;
|
|
}
|
|
|
|
if (render)
|
|
pixman_image_unref(fg_pix);
|
|
|
|
return x + (render ? w : 0);
|
|
}
|
|
|
|
static unsigned int
|
|
drwl_font_getwidth(Drwl *drwl, const char *text)
|
|
{
|
|
if (!drwl || !drwl->font || !text)
|
|
return 0;
|
|
return drwl_text(drwl, 0, 0, 0, 0, 0, text, 0);
|
|
}
|
|
|
|
static void
|
|
drwl_finish_drawing(Drwl *drwl)
|
|
{
|
|
if (drwl && drwl->pix)
|
|
pixman_image_unref(drwl->pix);
|
|
}
|
|
|
|
static void
|
|
drwl_destroy(Drwl *drwl)
|
|
{
|
|
if (drwl->pix)
|
|
pixman_image_unref(drwl->pix);
|
|
if (drwl->font)
|
|
drwl_destroy_font(drwl->font);
|
|
free(drwl);
|
|
}
|
|
|
|
static void
|
|
drwl_fini(void)
|
|
{
|
|
fcft_fini();
|
|
}
|