tMake text rendering standalone - ltk - Socket-based GUI for X11 (WIP)
HTML git clone git://lumidify.org/ltk.git (fast, but not encrypted)
HTML git clone https://lumidify.org/git/ltk.git (encrypted, but very slow)
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit 63762ef33368a564ca5f630cde74981c63d32cd7
DIR parent c2f5daed6266253ce6b97e240d74fa9a51972bd4
HTML Author: lumidify <nobody@lumidify.org>
Date: Sun, 7 Jun 2020 14:24:21 +0200
Make text rendering standalone
Diffstat:
M button.c | 6 ++----
M grid.c | 2 --
M ltk.c | 6 ++----
M ltk.h | 1 -
M text_common.c | 331 ++++++++++++++++++++++---------
M text_common.h | 60 ++++----------------------------
M text_line.c | 127 ++++++-------------------------
M text_line.h | 12 +++++-------
8 files changed, 273 insertions(+), 272 deletions(-)
---
DIR diff --git a/button.c b/button.c
t@@ -29,8 +29,6 @@
#include <X11/Xutil.h>
#include "util.h"
#include "khash.h"
-#include "stb_truetype.h"
-#include <fontconfig/fontconfig.h>
#include "text_common.h"
#include "ltk.h"
#include "text_line.h"
t@@ -160,7 +158,7 @@ ltk_button_create(ltk_window *window, const char *id, const char *text) {
<k_button_draw, <k_button_destroy, 1, LTK_BUTTON);
button->widget.mouse_release = <k_button_mouse_release;
uint16_t font_size = window->theme->window->font_size;
- button->tl = ltk_text_line_create(window, font_size, strdup(text));
+ button->tl = ltk_text_line_create(font_size, strdup(text));
ltk_button_theme *theme = window->theme->button;
button->widget.rect.w = button->tl->w + theme->border_width * 2 + theme->pad * 2;
button->widget.rect.h = button->tl->h + theme->border_width * 2 + theme->pad * 2;
t@@ -178,7 +176,7 @@ ltk_button_destroy(ltk_button *button, int shallow) {
(void)printf("WARNING: Tried to destroy NULL button.\n");
return;
}
- ltk_text_line_destroy(button->widget.window, button->tl);
+ ltk_text_line_destroy(button->tl);
ltk_remove_widget(button->widget.window, button->widget.id);
free(button->widget.id);
free(button);
DIR diff --git a/grid.c b/grid.c
t@@ -31,8 +31,6 @@
#include <X11/Xutil.h>
#include "util.h"
#include "khash.h"
-#include "stb_truetype.h"
-#include <fontconfig/fontconfig.h>
#include "text_common.h"
#include "ltk.h"
#include "grid.h"
DIR diff --git a/ltk.c b/ltk.c
t@@ -35,8 +35,6 @@
#include "util.h"
#include "khash.h"
#include "ini.h"
-#include "stb_truetype.h"
-#include <fontconfig/fontconfig.h>
#include "text_common.h"
#include "ltk.h"
#include "grid.h"
t@@ -322,7 +320,7 @@ ltk_create_window(const char *theme_path, const char *title, int x, int y, unsig
window->wm_delete_msg = XInternAtom(window->dpy, "WM_DELETE_WINDOW", False);
ltk_window_theme *wtheme = window->theme->window;
- window->tm = ltk_init_text(wtheme->font);
+ ltk_init_default_font(wtheme->font);
window->xwindow =
XCreateSimpleWindow(window->dpy, DefaultRootWindow(window->dpy), x, y,
w, h, wtheme->border_width,
t@@ -371,7 +369,7 @@ ltk_destroy_window(ltk_window *window) {
}
}
kh_destroy(widget, window->widget_hash);
- ltk_destroy_text(window->tm);
+ ltk_cleanup_text();
free(window);
}
DIR diff --git a/ltk.h b/ltk.h
t@@ -125,7 +125,6 @@ typedef struct ltk_window {
struct ltk_event_queue *first_event;
struct ltk_event_queue *last_event;
khash_t(widget) *widget_hash;
- ltk_text *tm;
} ltk_window;
char *ltk_read_file(const char *path, unsigned long *len);
DIR diff --git a/text_common.c b/text_common.c
t@@ -33,6 +33,73 @@
#include "text_common.h"
#include "ltk.h"
+typedef struct ltk_font {
+ stbtt_fontinfo info;
+ char *path;
+ int index; /* index in font file */
+ uint16_t id;
+ unsigned int refs;
+} ltk_font;
+
+/* Hash definitions */
+/* glyph id -> glyph info struct */
+KHASH_MAP_INIT_INT(glyphinfo, ltk_glyph_info*)
+/* font path, size -> glyph cache hash */
+KHASH_MAP_INIT_INT(glyphcache, khash_t(glyphinfo)*)
+
+static struct {
+ khash_t(glyphcache) *glyph_cache;
+ ltk_font **fonts;
+ int num_fonts;
+ int fonts_bufsize;
+ FcPattern *fcpattern;
+ ltk_font *default_font;
+ uint16_t font_id_cur;
+} tm = {NULL, NULL, 0, 0, NULL, NULL, 1};
+
+static const char *default_font;
+
+static void err(const char *msg);
+static char *read_file(const char *path, unsigned long *len);
+static ltk_font *ltk_get_font(char *path, int index);
+static void ltk_init_text(void);
+static ltk_glyph_info *ltk_create_glyph_info(ltk_font *font, int id,
+ float scale);
+static voidltk_destroy_glyph_info(ltk_glyph_info *gi);
+static ltk_glyph_info *ltk_get_glyph_info(ltk_font *font, int id,
+ float scale, khash_t(glyphinfo) *cache);
+static khash_t(glyphinfo) *ltk_get_glyph_cache(uint16_t font_id,
+ uint16_t font_size);
+static khint_t ltk_create_glyph_cache(uint16_t font_id, uint16_t font_size);
+static void ltk_destroy_glyph_cache(khash_t(glyphinfo) *cache);
+static void ltk_load_default_font(void);
+static ltk_font *ltk_create_font(char *path, uint16_t id, int index);
+static void ltk_destroy_font(ltk_font *font);
+static ltk_font *ltk_load_font(char *path, int index);
+static ltk_font *ltk_get_font(char *path, int index);
+
+static void
+err(const char *msg) {
+ perror(msg);
+ exit(1);
+}
+
+static char *
+read_file(const char *path, unsigned long *len) {
+ FILE *f;
+ char *file_contents;
+ f = fopen(path, "rb");
+ fseek(f, 0, SEEK_END);
+ *len = ftell(f);
+ fseek(f, 0, SEEK_SET);
+ file_contents = malloc(*len + 1);
+ fread(file_contents, 1, *len, f);
+ file_contents[*len] = '\0';
+ fclose(f);
+
+ return file_contents;
+}
+
/* These unicode routines are taken from
* https://github.com/JeffBezanson/cutef8 */
t@@ -45,8 +112,7 @@ static const uint32_t offsetsFromUTF8[6] = {
};
/* next character without NUL character terminator */
-uint32_t u8_nextmemchar(const char *s, size_t *i)
-{
+uint32_t u8_nextmemchar(const char *s, size_t *i) {
uint32_t ch = 0;
size_t sz = 0;
do {
t@@ -60,8 +126,7 @@ uint32_t u8_nextmemchar(const char *s, size_t *i)
}
/* number of characters in NUL-terminated string */
-size_t u8_strlen(const char *s)
-{
+size_t u8_strlen(const char *s) {
size_t count = 0;
size_t i = 0, lasti;
t@@ -77,8 +142,7 @@ size_t u8_strlen(const char *s)
return count;
}
-size_t u8_wc_toutf8(char *dest, uint32_t ch)
-{
+size_t u8_wc_toutf8(char *dest, uint32_t ch) {
if (ch < 0x80) {
dest[0] = (char)ch;
return 1;
t@@ -104,45 +168,40 @@ size_t u8_wc_toutf8(char *dest, uint32_t ch)
return 0;
}
-ltk_text *
-ltk_init_text(char *font_name)
-{
- ltk_text *tm = malloc(sizeof(ltk_text));
- if (!tm) ltk_fatal("Memory exhausted when trying to create text manager.");
- tm->fonts = NULL;
- tm->num_fonts = 0;
- tm->fonts_bufsize = 1;
- tm->glyph_cache = kh_init(glyphcache);
- /* FIXME: THIS REALLY SHOULD NOT BE UINT16_T! IT GETS MESSY WITH BIT-SHIFTING */
- tm->font_id_cur = 1;
- tm->fonts = malloc(sizeof(ltk_font *));
- if (!tm->fonts) ltk_fatal("Out of memory while trying to create text manager.\n");
- ltk_load_default_font(tm, font_name);
-
- return tm;
+void
+ltk_init_default_font(const char *font_name) {
+ default_font = strdup(font_name);
+ if (!default_font) err("ltk_init_default_font");
+}
+
+static void
+ltk_init_text(void) {
+ tm.fonts_bufsize = 1;
+ tm.glyph_cache = kh_init(glyphcache);
+ tm.fonts = malloc(sizeof(ltk_font *));
+ if (!tm.fonts) err("ltk_init_text");
+ ltk_load_default_font();
}
void
-ltk_destroy_text(ltk_text *tm)
-{
- for (int i = 0; i < tm->num_fonts; i++) {
- ltk_destroy_font(&tm->fonts[i]);
+ltk_cleanup_text(void) {
+ if (default_font) free(default_font);
+ for (int i = 0; i < tm.num_fonts; i++) {
+ ltk_destroy_font(&tm.fonts[i]);
}
- for (int k = kh_begin(tm->glyph_cache); k != kh_end(tm->glyph_cache); k++) {
- if (kh_exist(tm->glyph_cache, k)) {
- ltk_destroy_glyph_cache(kh_value(tm->glyph_cache, k));
+ if (!tm.glyph_cache) return;
+ for (int k = kh_begin(tm.glyph_cache); k != kh_end(tm.glyph_cache); k++) {
+ if (kh_exist(tm.glyph_cache, k)) {
+ ltk_destroy_glyph_cache(kh_value(tm.glyph_cache, k));
}
}
- kh_destroy(glyphcache, tm->glyph_cache);
-
- free(tm);
+ kh_destroy(glyphcache, tm.glyph_cache);
}
-ltk_glyph_info *
-ltk_create_glyph_info(ltk_font *font, int id, float scale)
-{
+static ltk_glyph_info *
+ltk_create_glyph_info(ltk_font *font, int id, float scale) {
ltk_glyph_info *glyph = malloc(sizeof(ltk_glyph_info));
- if (!glyph) ltk_fatal("Out of memory while trying to create glyph info.\n");
+ if (!glyph) err("ltk_create_glyph_info");
glyph->id = id;
glyph->refs = 0;
t@@ -154,16 +213,14 @@ ltk_create_glyph_info(ltk_font *font, int id, float scale)
return glyph;
}
-void
-ltk_destroy_glyph_info(ltk_glyph_info *gi)
-{
+static void
+ltk_destroy_glyph_info(ltk_glyph_info *gi) {
free(gi->alphamap);
free(gi);
}
-ltk_glyph_info *
-ltk_get_glyph_info(ltk_font *font, int id, float scale, khash_t(glyphinfo) *cache)
-{
+static ltk_glyph_info *
+ltk_get_glyph_info(ltk_font *font, int id, float scale, khash_t(glyphinfo) *cache) {
int ret;
khint_t k;
ltk_glyph_info *glyph;
t@@ -180,33 +237,33 @@ ltk_get_glyph_info(ltk_font *font, int id, float scale, khash_t(glyphinfo) *cach
return glyph;
}
-khash_t(glyphinfo) *
-ltk_get_glyph_cache(ltk_text *tm, uint16_t font_id, uint16_t font_size) {
+static khash_t(glyphinfo) *
+ltk_get_glyph_cache(uint16_t font_id, uint16_t font_size) {
+ if (!tm.glyph_cache) ltk_init_text();
khint_t k;
uint32_t attr = (uint32_t)font_id << 16 + font_size;
- k = kh_get(glyphcache, tm->glyph_cache, attr);
- if (k == kh_end(tm->glyph_cache)) {
- k = ltk_create_glyph_cache(tm, font_id, font_size);
+ k = kh_get(glyphcache, tm.glyph_cache, attr);
+ if (k == kh_end(tm.glyph_cache)) {
+ k = ltk_create_glyph_cache(font_id, font_size);
}
- return kh_value(tm->glyph_cache, k);
+ return kh_value(tm.glyph_cache, k);
}
-khint_t
-ltk_create_glyph_cache(ltk_text *tm, uint16_t font_id, uint16_t font_size)
-{
+static khint_t
+ltk_create_glyph_cache(uint16_t font_id, uint16_t font_size) {
+ if (!tm.glyph_cache) ltk_init_text();
khash_t(glyphinfo) *cache = kh_init(glyphinfo);
int ret;
khint_t k;
/* I guess I can just ignore ret for now */
- k = kh_put(glyphcache, tm->glyph_cache, font_id << 16 + font_size, &ret);
- kh_value(tm->glyph_cache, k) = cache;
+ k = kh_put(glyphcache, tm.glyph_cache, font_id << 16 + font_size, &ret);
+ kh_value(tm.glyph_cache, k) = cache;
return k;
}
-void
-ltk_destroy_glyph_cache(khash_t(glyphinfo) *cache)
-{
+static void
+ltk_destroy_glyph_cache(khash_t(glyphinfo) *cache) {
int k;
for (k = kh_begin(cache); k != kh_end(cache); k++) {
if (kh_exist(cache, k)) {
t@@ -216,36 +273,37 @@ ltk_destroy_glyph_cache(khash_t(glyphinfo) *cache)
kh_destroy(glyphinfo, cache);
}
-void
-ltk_load_default_font(ltk_text *tm, char *name)
-{
+static void
+ltk_load_default_font(void) {
FcPattern *match;
FcResult result;
char *file;
int index;
uint16_t font;
- tm->fcpattern = FcNameParse(name);
- FcPatternAddString(tm->fcpattern, FC_FONTFORMAT, "truetype");
- FcConfigSubstitute(NULL, tm->fcpattern, FcMatchPattern);
- FcDefaultSubstitute(tm->fcpattern);
- match = FcFontMatch(NULL, tm->fcpattern, &result);
+ if (default_font)
+ tm.fcpattern = FcNameParse(default_font);
+ else
+ tm.fcpattern = FcPatternCreate();
+ FcPatternAddString(tm.fcpattern, FC_FONTFORMAT, "truetype");
+ FcConfigSubstitute(NULL, tm.fcpattern, FcMatchPattern);
+ FcDefaultSubstitute(tm.fcpattern);
+ match = FcFontMatch(NULL, tm.fcpattern, &result);
FcPatternGetString(match, FC_FILE, 0, (FcChar8 **) &file);
FcPatternGetInteger(match, FC_INDEX, 0, &index);
- tm->default_font = ltk_get_font(tm, file, index);
+ tm.default_font = ltk_get_font(file, index);
FcPatternDestroy(match);
}
-ltk_font *
-ltk_create_font(char *path, uint16_t id, int index)
-{
+static ltk_font *
+ltk_create_font(char *path, uint16_t id, int index) {
long len;
ltk_font *font = malloc(sizeof(ltk_font));
- if (!font) ltk_fatal("Out of memory while trying to create font.\n");
- char *contents = ltk_read_file(path, &len);
+ if (!font) err("ltk_create_font");
+ char *contents = read_file(path, &len);
/* FIXME: error checking */
int offset = stbtt_GetFontOffsetForIndex(contents, index);
if (!stbtt_InitFont(&font->info, contents, offset)) {
t@@ -256,56 +314,139 @@ ltk_create_font(char *path, uint16_t id, int index)
font->refs = 0;
font->index = index;
font->path = strdup(path);
+ if (!font->path) err("ltk_create_font");
return font;
}
-void
-ltk_destroy_font(ltk_font *font)
-{
+static void
+ltk_destroy_font(ltk_font *font) {
free(font->info.data);
free(font);
}
-ltk_font *
-ltk_load_font(ltk_text *tm, char *path, int index)
-{
- ltk_font *font = ltk_create_font(path, tm->font_id_cur++, index);
- if (tm->num_fonts == tm->fonts_bufsize) {
- ltk_font *new = realloc(tm->fonts, tm->fonts_bufsize * 2 * sizeof(ltk_font *));
- if (!new) ltk_fatal("Out of memory while trying to create font.\n");
- tm->fonts = new;
- tm->fonts_bufsize = tm->fonts_bufsize * 2;
+static ltk_font *
+ltk_load_font(char *path, int index) {
+ ltk_font *font = ltk_create_font(path, tm.font_id_cur++, index);
+ if (tm.num_fonts == tm.fonts_bufsize) {
+ ltk_font *new = realloc(tm.fonts, tm.fonts_bufsize * 2 * sizeof(ltk_font *));
+ if (!new) err("ltk_load_font");
+ tm.fonts = new;
+ tm.fonts_bufsize *= 2;
}
- tm->fonts[tm->num_fonts] = font;
- tm->num_fonts++;
+ tm.fonts[tm.num_fonts] = font;
+ tm.num_fonts++;
return font;
}
-ltk_font *
-ltk_get_font(ltk_text *tm, char *path, int index)
-{
+static ltk_font *
+ltk_get_font(char *path, int index) {
ltk_font *font = NULL;
- for (int i = 0; i < tm->num_fonts; i++) {
- if (tm->fonts[i]->index == index &&
- strcmp(tm->fonts[i]->path, path) == 0) {
- font = &tm->fonts[i];
+ for (int i = 0; i < tm.num_fonts; i++) {
+ if (tm.fonts[i]->index == index &&
+ strcmp(tm.fonts[i]->path, path) == 0) {
+ font = &tm.fonts[i];
break;
}
}
if (!font)
- font = ltk_load_font(tm, path, index);
+ font = ltk_load_font(path, index);
return font;
}
void
-ltk_destroy_glyph(ltk_glyph *glyph, khash_t(glyphinfo) *cache)
-{
+ltk_text_to_glyphs(ltk_glyph *glyphs, int num_glyphs, char *text, uint16_t font_size,
+ int *x_min, int *y_min, int *x_max, int *y_max) {
+ uint32_t c1, c2 = 0;
+ int gid;
+ int index;
+ char *file;
+ size_t inc = 0;
+ int x = 0, y, kern_advance, ax;
+ int x1_abs, x2_abs;
+ float scale;
+ int ascent, descent, line_gap;
+ *x_min = INT_MAX, *x_max = INT_MIN, *y_min = INT_MAX, *y_max = INT_MIN;
+ ltk_glyph_info *ginfo;
+ if (!tm.default_font)
+ ltk_init_text();
+
+ ltk_font *font = tm.default_font;
+ khash_t(glyphinfo) *glyph_cache = ltk_get_glyph_cache(font->id, font_size);
+
+ scale = stbtt_ScaleForPixelHeight(&font->info, font_size);
+ stbtt_GetFontVMetrics(&font->info, &ascent, &descent, &line_gap);
+ ascent *= scale;
+ descent *= scale;
+
+ c1 = u8_nextmemchar(text, &inc);
+ for (int i = 0; i < num_glyphs; i++) {
+ gid = stbtt_FindGlyphIndex(&font->info, c1);
+ if (!gid) {
+ /* Question: Why does this not work with FcPatternDuplicate? */
+ FcPattern *pat = FcPatternCreate();
+ FcPattern *match;
+ FcResult result;
+ FcPatternAddBool(pat, FC_SCALABLE, 1);
+ FcConfigSubstitute(NULL, pat, FcMatchPattern);
+ FcDefaultSubstitute(pat);
+ FcCharSet *cs = FcCharSetCreate();
+ FcCharSetAddChar(cs, c1);
+ FcPatternAddCharSet(pat, FC_CHARSET, cs);
+ match = FcFontMatch(NULL, pat, &result);
+ FcPatternGetString(match, FC_FILE, 0, &file);
+ FcPatternGetInteger(match, FC_INDEX, 0, &index);
+ font = ltk_get_font(file, index);
+ glyph_cache = ltk_get_glyph_cache(font->id, font_size);
+ FcPatternDestroy(match);
+ FcPatternDestroy(pat);
+ gid = stbtt_FindGlyphIndex(&font->info, c1);
+ scale = stbtt_ScaleForPixelHeight(&font->info, font_size);
+ stbtt_GetFontVMetrics(&font->info, &ascent, &descent, &line_gap);
+ ascent *= scale;
+ descent *= scale;
+ }
+ ginfo = ltk_get_glyph_info(font, gid, scale, glyph_cache);
+ ginfo->refs++;
+ y = ascent + ginfo->yoff;
+ x1_abs = x + ginfo->xoff;
+
+ glyphs[i].x = x1_abs;
+ glyphs[i].y = y;
+
+ stbtt_GetGlyphHMetrics(&font->info, gid, &ax, 0);
+ x += (int) (ax * scale);
+ x2_abs = x;
+
+ glyphs[i].info = ginfo;
+ if (x1_abs < *x_min) *x_min = x1_abs;
+ if (y < *y_min) *y_min = y;
+ if (x2_abs > *x_max) *x_max = x2_abs;
+ if (y + ginfo->h > *y_max) *y_max = y + ginfo->h;
+
+ if (i != num_glyphs - 1) {
+ c2 = u8_nextmemchar(text, &inc);
+ kern_advance = stbtt_GetCodepointKernAdvance(&font->info, c1, c2);
+ x += (int) (kern_advance * scale);
+ }
+ c1 = c2;
+ }
+}
+
+/*
+void
+ltk_unref_glyph(ltk_glyph *glyph, khash_t(glyphinfo) *cache) {
int k;
if (--glyph->info->refs < 1) {
k = kh_get(glyphinfo, cache, glyph->info->id);
kh_del(glyphinfo, cache, k);
ltk_destroy_glyph_info(glyph->info);
}
- free(glyph);
}
+
+void
+ltk_unref_glyphs(ltk_glyph *glyphs, int num_glyphs) {
+ for (int i = 0; i < num_glyphs; i++)
+ ltk_unref_glyph(&glyphs[i]);
+}
+*/
DIR diff --git a/text_common.h b/text_common.h
t@@ -24,19 +24,8 @@
#ifndef _TEXT_COMMON_H_
#define _TEXT_COMMON_H_
-/*
-Requires the following includes:
-<X11/Xlib.h>, <X11/Xutil.h>, "stb_truetype.h",
-"khash.h"
-*/
-
-typedef struct {
- stbtt_fontinfo info;
- char *path;
- int index; /* index in font file */
- uint16_t id;
- unsigned int refs;
-} ltk_font;
+typedef struct ltk_font ltk_font;
+typedef struct ltk_text ltk_text;
/* Contains general info on glyphs that doesn't change regardless of the context */
typedef struct {
t@@ -58,54 +47,17 @@ typedef struct {
int y;
} ltk_glyph;
-/* Hash definitions */
-/* glyph id -> glyph info struct */
-KHASH_MAP_INIT_INT(glyphinfo, ltk_glyph_info*)
-/* font path, size -> glyph cache hash */
-KHASH_MAP_INIT_INT(glyphcache, khash_t(glyphinfo)*)
-
-typedef struct {
- khash_t(glyphcache) *glyph_cache;
- ltk_font **fonts;
- int num_fonts;
- int fonts_bufsize;
- FcPattern *fcpattern;
- ltk_font *default_font;
- uint16_t font_id_cur;
-} ltk_text;
-
uint32_t u8_nextmemchar(const char *s, size_t *i);
size_t u8_strlen(const char *s);
size_t u8_wc_toutf8(char *dest, uint32_t ch);
-ltk_text *ltk_init_text(char *font_name);
-
-void ltk_destroy_text_manager(ltk_text *tm);
-
-ltk_glyph_info *ltk_create_glyph_info(ltk_font *font, int id, float scale);
-
-void ltk_destroy_glyph_info(ltk_glyph_info *gi);
-
-ltk_glyph_info *ltk_get_glyph_info(ltk_font *font, int id, float scale, khash_t(glyphinfo) *cache);
-
-khash_t(glyphinfo) *ltk_get_glyph_cache(ltk_text *tm, uint16_t font_id, uint16_t font_size);
-
-khint_t ltk_create_glyph_cache(ltk_text *tm, uint16_t font_id, uint16_t font_size);
-
-void ltk_destroy_glyph_cache(khash_t(glyphinfo) *cache);
-
-void ltk_load_default_font(ltk_text *tm, char *name);
-
-ltk_font *ltk_create_font(char *path, uint16_t id, int index);
-
-void ltk_destroy_font(ltk_font *font);
-
-ltk_font *ltk_load_font(ltk_text *tm, char *path, int index);
+void ltk_init_default_font(const char *font_name);
-ltk_font *ltk_get_font(ltk_text *tm, char *path, int index);
+void ltk_cleanup_text(void);
-void ltk_destroy_glyph(ltk_glyph *glyph, khash_t(glyphinfo) *cache);
+void ltk_text_to_glyphs(ltk_glyph *glyphs, int num_glyphs, char *text,
+ uint16_t font_size, int *x_min, int *y_min, int *x_max, int *y_max);
#endif /* _TEXT_COMMON_H_ */
DIR diff --git a/text_line.c b/text_line.c
t@@ -24,16 +24,24 @@
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
-#include <limits.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
-#include "stb_truetype.h" /* http://nothings.org/stb/stb_truetype.h */
-#include <fontconfig/fontconfig.h>
-#include "khash.h"
#include "text_common.h"
-#include "ltk.h"
#include "text_line.h"
+static void err(const char *msg);
+static void ltk_text_line_create_glyphs(struct ltk_text_line *tl);
+static void ltk_text_line_draw_glyph(ltk_glyph *glyph, int xoff, int yoff,
+ XImage *img, XColor fg);
+static XImage *ltk_create_ximage(Display *dpy, int w, int h, int depth,
+ XColor bg);
+
+static void
+err(const char *msg) {
+ perror(msg);
+ exit(1);
+}
+
static XImage *
ltk_create_ximage(Display *dpy, int w, int h, int depth, XColor bg) {
XImage *img = XCreateImage(dpy, CopyFromParent, depth, ZPixmap, 0, NULL, w, h, 32, 0);
t@@ -99,78 +107,10 @@ ltk_text_line_render(
}
static void
-ltk_text_line_create_glyphs(ltk_window *window, struct ltk_text_line *tl) {
- uint32_t c1, c2 = 0;
- int gid;
- int index;
- char *file;
- size_t inc = 0;
- int x = 0, y, kern_advance, ax;
- int x1_abs, x2_abs;
- float scale;
- int ascent, descent, line_gap;
- int x_min = INT_MAX, x_max = INT_MIN, y_min = INT_MAX, y_max = INT_MIN;
- ltk_glyph_info *ginfo;
-
- ltk_font *font = window->tm->default_font;
- khash_t(glyphinfo) *glyph_cache = ltk_get_glyph_cache(window->tm, font->id, tl->font_size);
-
- scale = stbtt_ScaleForPixelHeight(&font->info, tl->font_size);
- stbtt_GetFontVMetrics(&font->info, &ascent, &descent, &line_gap);
- ascent *= scale;
- descent *= scale;
-
- c1 = u8_nextmemchar(tl->text, &inc);
- for (int i = 0; i < tl->glyph_len; i++) {
- gid = stbtt_FindGlyphIndex(&font->info, c1);
- if (!gid) {
- /* Question: Why does this not work with FcPatternDuplicate? */
- FcPattern *pat = FcPatternCreate();
- FcPattern *match;
- FcResult result;
- FcPatternAddBool(pat, FC_SCALABLE, 1);
- FcConfigSubstitute(NULL, pat, FcMatchPattern);
- FcDefaultSubstitute(pat);
- FcCharSet *cs = FcCharSetCreate();
- FcCharSetAddChar(cs, c1);
- FcPatternAddCharSet(pat, FC_CHARSET, cs);
- match = FcFontMatch(NULL, pat, &result);
- FcPatternGetString(match, FC_FILE, 0, &file);
- FcPatternGetInteger(match, FC_INDEX, 0, &index);
- font = ltk_get_font(window->tm, file, index);
- glyph_cache = ltk_get_glyph_cache(window->tm, font->id, tl->font_size);
- FcPatternDestroy(match);
- FcPatternDestroy(pat);
- gid = stbtt_FindGlyphIndex(&font->info, c1);
- scale = stbtt_ScaleForPixelHeight(&font->info, tl->font_size);
- stbtt_GetFontVMetrics(&font->info, &ascent, &descent, &line_gap);
- ascent *= scale;
- descent *= scale;
- }
- ginfo = ltk_get_glyph_info(font, gid, scale, glyph_cache);
- y = ascent + ginfo->yoff;
- x1_abs = x + ginfo->xoff;
-
- tl->glyphs[i].x = x1_abs;
- tl->glyphs[i].y = y;
-
- stbtt_GetGlyphHMetrics(&font->info, gid, &ax, 0);
- x += (int) (ax * scale);
- x2_abs = x;
-
- tl->glyphs[i].info = ginfo;
- if (x1_abs < x_min) x_min = x1_abs;
- if (y < y_min) y_min = y;
- if (x2_abs > x_max) x_max = x2_abs;
- if (y + ginfo->h > y_max) y_max = y + ginfo->h;
-
- if (i != tl->glyph_len - 1) {
- c2 = u8_nextmemchar(tl->text, &inc);
- kern_advance = stbtt_GetCodepointKernAdvance(&font->info, c1, c2);
- x += (int) (kern_advance * scale);
- }
- c1 = c2;
- };
+ltk_text_line_create_glyphs(struct ltk_text_line *tl) {
+ int x_min, x_max, y_min, y_max;
+ ltk_text_to_glyphs(tl->glyphs, tl->glyph_len, tl->text, tl->font_size,
+ &x_min, &y_min, &x_max, &y_max);
/* for drawing the glyphs at the right position on the image */
tl->x_min = x_min;
tl->y_min = y_min;
t@@ -179,44 +119,21 @@ ltk_text_line_create_glyphs(ltk_window *window, struct ltk_text_line *tl) {
}
struct ltk_text_line *
-ltk_text_line_create(ltk_window *window, uint16_t font_size, char *text) {
+ltk_text_line_create(uint16_t font_size, char *text) {
struct ltk_text_line *line = malloc(sizeof(struct ltk_text_line));
- if (!line) goto error;
+ if (!line) err("ltk_text_line_create");
line->text = text;
line->glyph_len = u8_strlen(text);
line->glyphs = malloc(line->glyph_len * sizeof(ltk_glyph));
line->font_size = font_size;
- ltk_text_line_create_glyphs(window, line);
+ ltk_text_line_create_glyphs(line);
return line;
-error:
- (void)fprintf(stderr, "No memory left while creating text line\n");
- exit(1);
}
void
-ltk_text_line_destroy(ltk_window *window, struct ltk_text_line *tl) {
+ltk_text_line_destroy(struct ltk_text_line *tl) {
free(tl->text);
- /* FIXME: glyph reference counting */
+ /* FIXME: Reference count glyph infos */
free(tl->glyphs);
- /*
- khint_t k;
- LtkTextManager *tm = ltk_get_text_manager();
- k = kh_get(glyphinfo, tm->glyph_cache, tr->font_id << 16 + tr->font_size);
- gcache = kh_value(tm->glyph_cache, k);
- for (int i = 0; i < tr->num_glyphs; i++) {
- glyph = &tr->glyphs[i];
- if (--glyph->info->refs < 1) {
- k = kh_get(glyphinfo, gcache, glyph->info->id);
- kh_del(glyphinfo, gcache, k);
- ltk_destroy_glyph_info(glyph->info);
- }
- }
- k = kh_get(fontstruct, tm->font_cache, tr->font_id);
- font = kh_value(tm->font_cache, k);
- if (--font->refs < 1) {
- kh_del(fontstruct, tm->font_cache, k);
- ltk_destroy_font(font);
- }
- */
free(tl);
}
DIR diff --git a/text_line.h b/text_line.h
t@@ -26,9 +26,7 @@
/*
Requires the following includes:
-<X11/Xlib.h>, <X11/Xutil.h>, "stb_truetype.h",
-"khash.h", <fontconfig/fontconfig.h>, "text_common.h",
-"ltk.h"
+<X11/Xlib.h>, <X11/Xutil.h>, "text_common.h",
*/
struct ltk_text_line {
t@@ -42,9 +40,9 @@ struct ltk_text_line {
int y_min;
};
-XImage *ltk_text_line_render(struct ltk_text_line *tl,
- Display *dpy, Window window, GC gc, Colormap colormap, XColor fg, XColor bg);
-struct ltk_text_line *ltk_text_line_create(ltk_window *window, uint16_t font_size, char *text);
-void ltk_text_line_destroy(ltk_window *window, struct ltk_text_line *tl);
+XImage *ltk_text_line_render(struct ltk_text_line *tl, Display *dpy,
+ Window window, GC gc, Colormap colormap, XColor fg, XColor bg);
+struct ltk_text_line *ltk_text_line_create(uint16_t font_size, char *text);
+void ltk_text_line_destroy(struct ltk_text_line *tl);
#endif /* _TEXT_BUFFER_H_ */