drwl.h (8267B) - View raw
/* * drwl - https://codeberg.org/sewn/drwl * * Copyright (c) 2023-2025 sewn <sewn@disroot.org> * Copyright (c) 2024 notchoc <notchoc@disroot.org> * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * The UTF-8 Decoder included is from Bjoern Hoehrmann: * Copyright (c) 2008-2010 Bjoern Hoehrmann <bjoern@hoehrmann.de> * See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details. */ #pragma once #include <stdlib.h> #include <fcft/fcft.h> #include <pixman-1/pixman.h> enum { ColFg, ColBg }; /* colorscheme index */ typedef struct fcft_font Fnt; typedef pixman_image_t Img; typedef struct { Img *image; Fnt *font; uint32_t *scheme; } Drwl; #define UTF8_ACCEPT 0 #define UTF8_REJECT 12 #define UTF8_INVALID 0xFFFD static const uint8_t utf8d[] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8, 0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12, 12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12, 12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12, 12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,12,12,12,12,12, }; static inline uint32_t utf8decode(uint32_t *state, uint32_t *codep, uint8_t byte) { uint32_t type = utf8d[byte]; *codep = (*state != UTF8_ACCEPT) ? (byte & 0x3fu) | (*codep << 6) : (0xff >> type) & (byte); *state = utf8d[256 + *state + type]; return *state; } static int drwl_init(void) { 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, Fnt *font) { if (drwl) drwl->font = font; } static void drwl_setimage(Drwl *drwl, Img *image) { if (drwl) drwl->image = image; } static Fnt * drwl_font_create(Drwl *drwl, size_t count, const char *names[static count], const char *attributes) { Fnt *font = fcft_from_name(count, names, attributes); if (drwl) drwl_setfont(drwl, font); return font; } static void drwl_font_destroy(Fnt *font) { fcft_destroy(font); } static inline pixman_color_t convert_color(uint32_t clr) { return (pixman_color_t){ ((clr >> 24) & 0xFF) * 0x101 * (clr & 0xFF) / 0xFF, ((clr >> 16) & 0xFF) * 0x101 * (clr & 0xFF) / 0xFF, ((clr >> 8) & 0xFF) * 0x101 * (clr & 0xFF) / 0xFF, (clr & 0xFF) * 0x101 }; } static void drwl_setscheme(Drwl *drwl, uint32_t *scm) { if (drwl) drwl->scheme = scm; } static Img * drwl_image_create(Drwl *drwl, unsigned int w, unsigned int h, uint32_t *bits) { Img *image; pixman_region32_t clip; image = pixman_image_create_bits_no_clear( PIXMAN_a8r8g8b8, w, h, bits, w * 4); if (!image) return NULL; pixman_region32_init_rect(&clip, 0, 0, w, h); pixman_image_set_clip_region32(image, &clip); pixman_region32_fini(&clip); if (drwl) drwl_setimage(drwl, image); return image; } 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->image) return; clr = convert_color(drwl->scheme[invert ? ColBg : ColFg]); if (filled) pixman_image_fill_rectangles(PIXMAN_OP_SRC, drwl->image, &clr, 1, &(pixman_rectangle16_t){x, y, w, h}); else pixman_image_fill_rectangles(PIXMAN_OP_SRC, drwl->image, &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 render = x || y || w || h; long x_kern; uint32_t cp = 0, last_cp = 0, state; pixman_color_t clr; pixman_image_t *fg_pix = NULL; int noellipsis = 0; const struct fcft_glyph *glyph, *eg = NULL; int fcft_subpixel_mode = FCFT_SUBPIXEL_DEFAULT; if (!drwl || (render && (!drwl->scheme || !w || !drwl->image)) || !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; if (render) eg = fcft_rasterize_char_utf32(drwl->font, 0x2026 /* … */, fcft_subpixel_mode); for (const char *p = text, *pp; pp = p, *p; p++) { for (state = UTF8_ACCEPT; *p && utf8decode(&state, &cp, *p) > UTF8_REJECT; p++) ; if (!*p || state == UTF8_REJECT) { cp = UTF8_INVALID; if (p > pp) p--; } 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; if (render && !noellipsis && x_kern + glyph->advance.x + eg->advance.x > w && *(p + 1) != '\0') { /* cannot fit ellipsis after current codepoint */ if (drwl_text(drwl, 0, 0, 0, 0, 0, pp, 0) + x_kern <= w) { noellipsis = 1; } else { w -= eg->advance.x; pixman_image_composite32( PIXMAN_OP_OVER, fg_pix, eg->pix, drwl->image, 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->image, 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->image, 0, 0, 0, 0, x + glyph->x, ty - glyph->y, glyph->width, glyph->height); 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 unsigned int drwl_font_getwidth_clamp(Drwl *drwl, const char *text, unsigned int n) { unsigned int tmp = 0; if (drwl && drwl->font && text && n) tmp = drwl_text(drwl, 0, 0, 0, 0, 0, text, n); return tmp < n ? tmp : n; } static void drwl_image_destroy(Img *image) { pixman_image_unref(image); } static void drwl_destroy(Drwl *drwl) { if (drwl->font) drwl_font_destroy(drwl->font); if (drwl->image) drwl_image_destroy(drwl->image); free(drwl); } static void drwl_fini(void) { fcft_fini(); }