diff options
Diffstat (limited to 'drwl.h')
| -rw-r--r-- | drwl.h | 284 |
1 files changed, 0 insertions, 284 deletions
@@ -1,284 +0,0 @@ -/* - * 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(); -} |