pauljako/yambar
1
0
Fork 0
forked from external/yambar
Code Pull requests Activity

font: initial port from cairo scaled fonts to raw freetype + pixman

Browse source
This commit is contained in:
Daniel Eklöf 2019-09-22 00:50:11 +02:00
parent 393e1909b7
commit b3a5e0b5d7
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
6 changed files with 659 additions and 191 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
config.c
View file

@ -67,7 +67,7 @@ conf_to_color(const struct yml_node *node)
struct font *
conf_to_font(const struct yml_node *node)
{
return font_new(yml_value_as_string(node));
return font_from_name(yml_value_as_string(node));;
}
struct deco *
@ -263,7 +263,7 @@ conf_to_bar(const struct yml_node *bar, enum bar_backend backend)
* and particles. This allows us to specify a default font and
* foreground color at top-level.
*/
struct font *font = font_new("sans");
struct font *font = font_from_name("sans");
struct rgba foreground = (struct rgba){1.0, 1.0, 1.0, 1.0}; /* White */
const struct yml_node *font_node = yml_get_value(bar, "font");

587
font.c
View file

@ -1,29 +1,32 @@
#include "font.h"
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <assert.h>
#include <fontconfig/fontconfig.h>
#include <cairo-ft.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <wchar.h>
#include <assert.h>
#include <threads.h>
#define LOG_MODULE "font"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "tllist.h"
#include "stride.h"
struct font {
char *name;
cairo_scaled_font_t *scaled_font;
int ref_counter;
};
#define min(x, y) ((x) < (y) ? (x) : (y))
static tll(const struct font *) cache = tll_init();
static FT_Library ft_lib;
static mtx_t ft_lock;
static tll(const struct font *) font_cache = tll_init();
static const size_t glyph_cache_size = 512;
static void __attribute__((constructor))
init(void)
{
FcInit();
FT_Init_FreeType(&ft_lib);
mtx_init(&ft_lock, mtx_plain);
#if defined(LOG_ENABLE_DBG) && LOG_ENABLE_DBG
int raw_version = FcGetVersion();
@ -40,16 +43,232 @@ init(void)
static void __attribute__((destructor))
fini(void)
{
assert(tll_length(font_cache) == 0);
mtx_destroy(&ft_lock);
FT_Done_FreeType(ft_lib);
FcFini();
assert(tll_length(cache) == 0);
}
static bool
font_destroy_no_free(struct font *font)
{
assert(font->ref_counter > 0);
if (--font->ref_counter > 0)
return false;
if (font->face != NULL) {
mtx_lock(&ft_lock);
FT_Done_Face(font->face);
mtx_unlock(&ft_lock);
}
mtx_destroy(&font->lock);
if (font->fc_pattern != NULL)
FcPatternDestroy(font->fc_pattern);
if (font->fc_fonts != NULL)
FcFontSetDestroy(font->fc_fonts);
free(font->name);
if (font->cache == NULL)
return true;
for (size_t i = 0; i < glyph_cache_size; i++) {
if (font->cache[i] == NULL)
continue;
tll_foreach(*font->cache[i], it) {
if (!it->item.valid)
continue;
void *image = pixman_image_get_data(it->item.pix);
pixman_image_unref(it->item.pix);
free(image);
}
tll_free(*font->cache[i]);
free(font->cache[i]);
}
free(font->cache);
tll_foreach(font_cache, it) {
if (it->item == font) {
tll_remove(font_cache, it);
break;
}
}
return true;
}
static bool
from_font_set(FcPattern *pattern, FcFontSet *fonts, int start_idx,
struct font *font, bool is_fallback)
{
memset(font, 0, sizeof(*font));
FcChar8 *face_file = NULL;
FcPattern *final_pattern = NULL;
int font_idx = -1;
for (int i = start_idx; i < fonts->nfont; i++) {
FcPattern *pat = FcFontRenderPrepare(NULL, pattern, fonts->fonts[i]);
assert(pat != NULL);
if (FcPatternGetString(pat, FC_FT_FACE, 0, &face_file) != FcResultMatch) {
if (FcPatternGetString(pat, FC_FILE, 0, &face_file) != FcResultMatch) {
FcPatternDestroy(pat);
continue;
}
}
final_pattern = pat;
font_idx = i;
break;
}
assert(font_idx != -1);
assert(final_pattern != NULL);
double dpi;
if (FcPatternGetDouble(final_pattern, FC_DPI, 0, &dpi) != FcResultMatch)
dpi = 96;
double size;
if (FcPatternGetDouble(final_pattern, FC_PIXEL_SIZE, 0, &size)) {
LOG_ERR("%s: failed to get size", face_file);
FcPatternDestroy(final_pattern);
return false;
}
FcBool scalable;
if (FcPatternGetBool(final_pattern, FC_SCALABLE, 0, &scalable) != FcResultMatch)
scalable = FcTrue;
double pixel_fixup;
if (FcPatternGetDouble(final_pattern, "pixelsizefixupfactor", 0, &pixel_fixup) != FcResultMatch)
pixel_fixup = 1.;
LOG_DBG("loading: %s", face_file);
mtx_lock(&ft_lock);
FT_Face ft_face;
FT_Error ft_err = FT_New_Face(ft_lib, (const char *)face_file, 0, &ft_face);
mtx_unlock(&ft_lock);
if (ft_err != 0)
LOG_ERR("%s: failed to create FreeType face", face_file);
if ((ft_err = FT_Set_Char_Size(ft_face, size * 64, 0, 0, 0)) != 0)
LOG_WARN("failed to set character size");
FcBool fc_hinting;
if (FcPatternGetBool(final_pattern, FC_HINTING,0, &fc_hinting) != FcResultMatch)
fc_hinting = FcTrue;
FcBool fc_antialias;
if (FcPatternGetBool(final_pattern, FC_ANTIALIAS, 0, &fc_antialias) != FcResultMatch)
fc_antialias = FcTrue;
int fc_hintstyle;
if (FcPatternGetInteger(final_pattern, FC_HINT_STYLE, 0, &fc_hintstyle) != FcResultMatch)
fc_hintstyle = FC_HINT_SLIGHT;
int fc_rgba;
if (FcPatternGetInteger(final_pattern, FC_RGBA, 0, &fc_rgba) != FcResultMatch)
fc_rgba = FC_RGBA_UNKNOWN;
int load_flags = 0;
if (!fc_antialias) {
if (!fc_hinting || fc_hintstyle == FC_HINT_NONE)
load_flags |= FT_LOAD_MONOCHROME | FT_LOAD_NO_HINTING | FT_LOAD_TARGET_NORMAL;
else
load_flags |= FT_LOAD_MONOCHROME | FT_LOAD_TARGET_MONO;
} else {
if (!fc_hinting || fc_hintstyle == FC_HINT_NONE)
load_flags |= FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING | FT_LOAD_TARGET_NORMAL;
else if (fc_hinting && fc_hintstyle == FC_HINT_SLIGHT)
load_flags |= FT_LOAD_DEFAULT | FT_LOAD_TARGET_LIGHT;
else if (fc_rgba == FC_RGBA_RGB || fc_rgba == FC_RGBA_BGR)
load_flags |= FT_LOAD_DEFAULT | FT_LOAD_TARGET_LCD;
else if (fc_rgba == FC_RGBA_VRGB || fc_rgba == FC_RGBA_VBGR)
load_flags |= FT_LOAD_DEFAULT | FT_LOAD_TARGET_LCD_V;
else
load_flags |= FT_LOAD_DEFAULT | FT_LOAD_TARGET_NORMAL;
}
FcBool fc_embeddedbitmap;
if (FcPatternGetBool(final_pattern, FC_EMBEDDED_BITMAP, 0, &fc_embeddedbitmap) != FcResultMatch)
fc_embeddedbitmap = FcTrue;
if (!fc_embeddedbitmap)
load_flags |= FT_LOAD_NO_BITMAP;
int render_flags = 0;
if (!fc_antialias)
render_flags |= FT_RENDER_MODE_MONO;
else {
if (fc_rgba == FC_RGBA_RGB || fc_rgba == FC_RGBA_BGR)
render_flags |= FT_RENDER_MODE_LCD;
else if (fc_rgba == FC_RGBA_VRGB || fc_rgba == FC_RGBA_VBGR)
render_flags |= FT_RENDER_MODE_LCD_V;
else
render_flags |= FT_RENDER_MODE_NORMAL;
}
int fc_lcdfilter;
if (FcPatternGetInteger(final_pattern, FC_LCD_FILTER, 0, &fc_lcdfilter) != FcResultMatch)
fc_lcdfilter = FC_LCD_DEFAULT;
switch (fc_lcdfilter) {
case FC_LCD_NONE: font->lcd_filter = FT_LCD_FILTER_NONE; break;
case FC_LCD_DEFAULT: font->lcd_filter = FT_LCD_FILTER_DEFAULT; break;
case FC_LCD_LIGHT: font->lcd_filter = FT_LCD_FILTER_LIGHT; break;
case FC_LCD_LEGACY: font->lcd_filter = FT_LCD_FILTER_LEGACY; break;
}
FcPatternDestroy(final_pattern);
int max_x_advance = ft_face->size->metrics.max_advance / 64;
int height = ft_face->size->metrics.height / 64;
int descent = ft_face->size->metrics.descender / 64;
int ascent = ft_face->size->metrics.ascender / 64;
mtx_init(&font->lock, mtx_plain);
font->face = ft_face;
font->load_flags = load_flags | FT_LOAD_COLOR;
font->render_flags = render_flags;
font->pixel_size_fixup = scalable ? pixel_fixup : 1.;
font->bgr = fc_rgba == FC_RGBA_BGR || fc_rgba == FC_RGBA_VBGR;
font->fc_idx = font_idx;
font->is_fallback = is_fallback;
font->ref_counter = 1;
font->fextents.height = height * font->pixel_size_fixup;
font->fextents.descent = -descent * font->pixel_size_fixup;
font->fextents.ascent = ascent * font->pixel_size_fixup;
font->fextents.max_x_advance = max_x_advance * font->pixel_size_fixup;
LOG_DBG("metrics: height: %d, descent: %d, ascent: %d, x-advance: %d",
height, descent, ascent, max_x_advance);
if (!is_fallback) {
font->fc_pattern = pattern;
font->fc_fonts = fonts;
font->cache = calloc(glyph_cache_size, sizeof(font->cache[0]));
}
return true;
}
struct font *
font_new(const char *name)
font_from_name(const char *name)
{
/* Check if font have already been loaded */
tll_foreach(cache, it) {
if (strcmp(name, it->item->name) == 0)
LOG_DBG("instantiating %s", name);
tll_foreach(font_cache, it) {
if (strcmp(it->item->name, name) == 0)
return font_clone(it->item);
}
@ -68,58 +287,273 @@ font_new(const char *name)
FcDefaultSubstitute(pattern);
FcResult result;
FcPattern *final_pattern = FcFontMatch(NULL, pattern, &result);
FcPatternDestroy(pattern);
if (final_pattern == NULL) {
FcFontSet *fonts = FcFontSort(NULL, pattern, FcTrue, NULL, &result);
if (result != FcResultMatch) {
LOG_ERR("%s: failed to match font", name);
return NULL;
}
double font_size;
if (FcPatternGetDouble(final_pattern, FC_PIXEL_SIZE, 0, &font_size)) {
LOG_ERR("%s: failed to get size", name);
FcPatternDestroy(final_pattern);
return NULL;
}
cairo_font_face_t *face = cairo_ft_font_face_create_for_pattern(
final_pattern);
FcPatternDestroy(final_pattern);
if (cairo_font_face_status(face) != CAIRO_STATUS_SUCCESS) {
LOG_ERR("%s: failed to create cairo font face", name);
cairo_font_face_destroy(face);
return NULL;
}
cairo_matrix_t matrix, ctm;
cairo_matrix_init_identity(&ctm);
cairo_matrix_init_scale(&matrix, font_size, font_size);
cairo_font_options_t *options = cairo_font_options_create();
cairo_scaled_font_t *scaled_font = cairo_scaled_font_create(
face, &matrix, &ctm, options);
cairo_font_options_destroy(options);
cairo_font_face_destroy(face);
if (cairo_scaled_font_status(scaled_font) != CAIRO_STATUS_SUCCESS) {
LOG_ERR("%s: failed to create scaled font", name);
cairo_scaled_font_destroy(scaled_font);
FcPatternDestroy(pattern);
return NULL;
}
struct font *font = malloc(sizeof(*font));
font->name = strdup(name);
font->scaled_font = scaled_font;
font->ref_counter = 1;
if (!from_font_set(pattern, fonts, 0, font, false)) {
free(font);
FcFontSetDestroy(fonts);
FcPatternDestroy(pattern);
return NULL;
}
tll_push_back(cache, font);
font->name = strdup(name);
tll_push_back(font_cache, font);
return font;
}
static size_t
hash_index(wchar_t wc)
{
return wc % glyph_cache_size;
}
static bool
glyph_for_wchar(const struct font *font, wchar_t wc, struct glyph *glyph)
{
/*
* LCD filter is per library instance. Thus we need to re-set it
* every time...
*
* Also note that many freetype builds lack this feature
* (FT_CONFIG_OPTION_SUBPIXEL_RENDERING must be defined, and isn't
* by default) */
FT_Error err = FT_Library_SetLcdFilter(ft_lib, font->lcd_filter);
if (err != 0 && err != FT_Err_Unimplemented_Feature)
goto err;
FT_UInt idx = FT_Get_Char_Index(font->face, wc);
if (idx == 0) {
/* No glyph in this font, try fontconfig fallback fonts */
/* Try fontconfig fallback fonts */
assert(font->fc_pattern != NULL);
assert(font->fc_fonts != NULL);
assert(font->fc_idx != -1);
for (int i = font->fc_idx + 1; i < font->fc_fonts->nfont; i++) {
struct font fallback;
if (!from_font_set(font->fc_pattern, font->fc_fonts, i, &fallback, true))
continue;
if (glyph_for_wchar(&fallback, wc, glyph)) {
LOG_DBG("%C: used fontconfig fallback", wc);
font_destroy_no_free(&fallback);
return true;
}
font_destroy_no_free(&fallback);
}
LOG_WARN("%C: no glyph found (in neither the main font, "
"nor any fallback fonts)", wc);
}
err = FT_Load_Glyph(font->face, idx, font->load_flags);
if (err != 0) {
LOG_ERR("load failed");
goto err;
}
err = FT_Render_Glyph(font->face->glyph, font->render_flags);
if (err != 0)
goto err;
assert(font->face->glyph->format == FT_GLYPH_FORMAT_BITMAP);
FT_Bitmap *bitmap = &font->face->glyph->bitmap;
if (bitmap->width == 0)
goto err;
pixman_format_code_t pix_format;
int width;
int rows;
switch (bitmap->pixel_mode) {
case FT_PIXEL_MODE_MONO:
pix_format = PIXMAN_a1;
width = bitmap->width;
rows = bitmap->rows;
break;
case FT_PIXEL_MODE_GRAY:
pix_format = PIXMAN_a8;
width = bitmap->width;
rows = bitmap->rows;
break;
case FT_PIXEL_MODE_LCD:
pix_format = PIXMAN_x8r8g8b8;
width = bitmap->width / 3;
rows = bitmap->rows;
break;
case FT_PIXEL_MODE_LCD_V:
pix_format = PIXMAN_x8r8g8b8;
width = bitmap->width;
rows = bitmap->rows / 3;
break;
case FT_PIXEL_MODE_BGRA:
pix_format = PIXMAN_a8r8g8b8;
width = bitmap->width;
rows = bitmap->rows;
break;
default:
LOG_ERR("unimplemented: FT pixel mode: %d", bitmap->pixel_mode);
goto err;
break;
}
int stride = stride_for_format_and_width(pix_format, width);
assert(stride >= bitmap->pitch);
uint8_t *data = malloc(rows * stride);
/* Convert FT bitmap to pixman image */
switch (bitmap->pixel_mode) {
case FT_PIXEL_MODE_MONO:
for (size_t r = 0; r < bitmap->rows; r++) {
for (size_t c = 0; c < (bitmap->width + 7) / 8; c++) {
uint8_t v = bitmap->buffer[r * bitmap->pitch + c];
uint8_t reversed = 0;
for (size_t i = 0; i < min(8, bitmap->width - c * 8); i++)
reversed |= ((v >> (7 - i)) & 1) << i;
data[r * stride + c] = reversed;
}
}
break;
case FT_PIXEL_MODE_GRAY:
for (size_t r = 0; r < bitmap->rows; r++) {
for (size_t c = 0; c < bitmap->width; c++)
data[r * stride + c] = bitmap->buffer[r * bitmap->pitch + c];
}
break;
case FT_PIXEL_MODE_BGRA:
assert(stride == bitmap->pitch);
memcpy(data, bitmap->buffer, bitmap->rows * bitmap->pitch);
break;
case FT_PIXEL_MODE_LCD:
for (size_t r = 0; r < bitmap->rows; r++) {
for (size_t c = 0; c < bitmap->width; c += 3) {
unsigned char _r = bitmap->buffer[r * bitmap->pitch + c + (font->bgr ? 2 : 0)];
unsigned char _g = bitmap->buffer[r * bitmap->pitch + c + 1];
unsigned char _b = bitmap->buffer[r * bitmap->pitch + c + (font->bgr ? 0 : 2)];
uint32_t *p = (uint32_t *)&data[r * stride + 4 * (c / 3)];
*p = _r << 16 | _g << 8 | _b;
}
}
break;
case FT_PIXEL_MODE_LCD_V:
/* Unverified */
for (size_t r = 0; r < bitmap->rows; r += 3) {
for (size_t c = 0; c < bitmap->width; c++) {
unsigned char _r = bitmap->buffer[(r + (font->bgr ? 2 : 0)) * bitmap->pitch + c];
unsigned char _g = bitmap->buffer[(r + 1) * bitmap->pitch + c];
unsigned char _b = bitmap->buffer[(r + (font->bgr ? 0 : 2)) * bitmap->pitch + c];
uint32_t *p = (uint32_t *)&data[r / 3 * stride + 4 * c];
*p = _r << 16 | _g << 8 | _b;
}
}
break;
default:
abort();
break;
}
pixman_image_t *pix = pixman_image_create_bits_no_clear(
pix_format, width, rows, (uint32_t *)data, stride);
if (pix == NULL) {
free(data);
goto err;
}
pixman_image_set_component_alpha(
pix,
bitmap->pixel_mode == FT_PIXEL_MODE_LCD ||
bitmap->pixel_mode == FT_PIXEL_MODE_LCD_V);
if (font->pixel_size_fixup != 1.) {
struct pixman_transform scale;
pixman_transform_init_scale(
&scale,
pixman_double_to_fixed(1. / font->pixel_size_fixup),
pixman_double_to_fixed(1. / font->pixel_size_fixup));
pixman_image_set_transform(pix, &scale);
}
*glyph = (struct glyph){
.wc = wc,
.cols = wcwidth(wc),
.pix = pix,
.x = font->face->glyph->bitmap_left / font->pixel_size_fixup,
.y = font->face->glyph->bitmap_top * font->pixel_size_fixup,
.x_advance = font->face->glyph->advance.x / 64,
.width = width,
.height = rows,
.valid = true,
};
return true;
err:
*glyph = (struct glyph){
.wc = wc,
.valid = false,
};
return false;
}
const struct glyph *
font_glyph_for_wc(struct font *font, wchar_t wc)
{
mtx_lock(&font->lock);
assert(font->cache != NULL);
size_t hash_idx = hash_index(wc);
hash_entry_t *hash_entry = font->cache[hash_idx];
if (hash_entry != NULL) {
tll_foreach(*hash_entry, it) {
if (it->item.wc == wc) {
mtx_unlock(&font->lock);
return it->item.valid ? &it->item : NULL;
}
}
}
struct glyph glyph;
bool got_glyph = glyph_for_wchar(font, wc, &glyph);
if (hash_entry == NULL) {
hash_entry = calloc(1, sizeof(*hash_entry));
assert(font->cache[hash_idx] == NULL);
font->cache[hash_idx] = hash_entry;
}
assert(hash_entry != NULL);
tll_push_back(*hash_entry, glyph);
mtx_unlock(&font->lock);
return got_glyph ? &tll_back(*hash_entry) : NULL;
}
struct font *
font_clone(const struct font *_font)
{
@ -131,33 +565,6 @@ font_clone(const struct font *_font)
void
font_destroy(struct font *font)
{
if (font == NULL)
return;
assert(font->ref_counter > 0);
if (--font->ref_counter > 0)
return;
tll_foreach(cache, it) {
if (it->item == font) {
tll_remove(cache, it);
break;
}
}
cairo_scaled_font_destroy(font->scaled_font);
free(font->name);
free(font);
}
const char *
font_face(const struct font *font)
{
return font->name;
}
cairo_scaled_font_t *
font_scaled_font(const struct font *font)
{
return font->scaled_font;
if (font_destroy_no_free(font))
free(font);
}

70
font.h
View file

@ -1,15 +1,71 @@
#pragma once
#include <stdbool.h>
#include <cairo.h>
#include <threads.h>
#include "color.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_LCD_FILTER_H
#include <fontconfig/fontconfig.h>
#include <pixman.h>
struct font;
#include "tllist.h"
struct font *font_new(const char *name);
struct glyph {
wchar_t wc;
int cols;
pixman_image_t *pix;
int x;
int y;
int x_advance;
int width;
int height;
bool valid;
};
typedef tll(struct glyph) hash_entry_t;
struct font {
char *name;
FcPattern *fc_pattern;
FcFontSet *fc_fonts;
int fc_idx;
FT_Face face;
int load_flags;
int render_flags;
FT_LcdFilter lcd_filter;
double pixel_size_fixup; /* Scale factor - should only be used with ARGB32 glyphs */
bool bgr; /* True for FC_RGBA_BGR and FC_RGBA_VBGR */
struct {
int height;
int descent;
int ascent;
int max_x_advance;
} fextents;
struct {
int position;
int thickness;
} underline;
struct {
int position;
int thickness;
} strikeout;
hash_entry_t **cache;
mtx_t lock;
bool is_fallback;
int ref_counter;
};
struct font *font_from_name(const char *name);
struct font *font_clone(const struct font *font);
const struct glyph *font_glyph_for_wc(struct font *font, wchar_t wc);
void font_destroy(struct font *font);
const char *font_face(const struct font *font);
cairo_scaled_font_t *font_scaled_font(const struct font *font);

5
meson.build
View file

@ -36,7 +36,9 @@ endif
cc = meson.get_compiler('c')
dl = cc.find_library('dl')
threads = dependency('threads')
freetype = dependency('freetype2')
fontconfig = dependency('fontconfig')
pixman = dependency('pixman-1')
cairo = dependency('cairo')
cairo_ft = dependency('cairo-ft')
yaml = dependency('yaml-0.1')
@ -104,7 +106,7 @@ f00bar = executable(
'tag.c', 'tag.h',
'tllist.h',
'yml.c', 'yml.h',
dependencies: [bar, cairo, cairo_ft, fontconfig, yaml, threads, dl] +
dependencies: [bar, freetype, fontconfig, pixman, cairo, cairo_ft, yaml, threads, dl] +
decorations + particles + modules,
build_rpath: '$ORIGIN/modules:$ORIGIN/decorations:$ORIGIN/particles',
export_dynamic: true,
@ -122,6 +124,7 @@ install_headers(
'log.h',
'module.h',
'particle.h',
'stride.h',
'tag.h',
'tllist.h',
'yml.h',

175
particles/string.c
View file

@ -19,13 +19,8 @@ struct eprivate {
/* Set when instantiating */
char *text;
/* Set in begin_expose() */
cairo_font_extents_t fextents;
cairo_glyph_t *glyphs;
cairo_text_cluster_t *clusters;
cairo_text_cluster_flags_t cluster_flags;
const struct glyph **glyphs;
int num_glyphs;
int num_clusters;
};
static void
@ -34,11 +29,7 @@ exposable_destroy(struct exposable *exposable)
struct eprivate *e = exposable->private;
free(e->text);
if (e->glyphs != NULL)
cairo_glyph_free(e->glyphs);
if (e->clusters != NULL)
cairo_text_cluster_free(e->clusters);
free(e->glyphs);
free(e);
exposable_default_destroy(exposable);
}
@ -48,48 +39,58 @@ begin_expose(struct exposable *exposable, cairo_t *cr)
{
struct eprivate *e = exposable->private;
cairo_scaled_font_t *scaled = font_scaled_font(exposable->particle->font);
cairo_set_scaled_font(cr, scaled);
cairo_font_extents(cr, &e->fextents);
struct font *font = exposable->particle->font;
LOG_DBG("%s: ascent=%f, descent=%f, height=%f",
font_face(exposable->particle->font),
e->fextents.ascent, e->fextents.descent, e->fextents.height);
font->name, font->fextents.ascent,
font->fextents.descent, font->fextents.height);
cairo_status_t status = cairo_scaled_font_text_to_glyphs(
scaled, 0, 0, e->text, -1, &e->glyphs, &e->num_glyphs,
&e->clusters, &e->num_clusters, &e->cluster_flags);
size_t chars = mbstowcs(NULL, e->text, 0);
wchar_t wtext[chars + 1];
mbstowcs(wtext, e->text, chars + 1);
if (status != CAIRO_STATUS_SUCCESS) {
LOG_WARN("failed to convert \"%s\" to glyphs: %s",
e->text, cairo_status_to_string(status));
e->glyphs = malloc(chars * sizeof(e->glyphs[0]));
e->num_glyphs = 0;
e->num_glyphs = -1;
e->num_clusters = -1;
memset(&e->fextents, 0, sizeof(e->fextents));
exposable->width = 0;
} else {
cairo_text_extents_t extents;
cairo_scaled_font_glyph_extents(
scaled, e->glyphs, e->num_glyphs, &extents);
exposable->width = (exposable->particle->left_margin +
extents.x_advance +
exposable->particle->right_margin);
/* Convert text to glyph masks/images. */
for (size_t i = 0; i < chars; i++) {
const struct glyph *glyph = font_glyph_for_wc(font, wtext[i]);
if (glyph == NULL)
continue;
e->glyphs[e->num_glyphs++] = glyph;
}
exposable->width = exposable->particle->left_margin +
exposable->particle->right_margin;
/* Calculate the size we need to render the glyphs */
for (int i = 0; i < e->num_glyphs; i++)
exposable->width += e->glyphs[i]->x_advance;
return exposable->width;
}
static inline pixman_color_t
color_hex_to_pixman_with_alpha(uint32_t color, uint16_t alpha)
{
int alpha_div = 0xffff / alpha;
return (pixman_color_t){
.red = ((color >> 16 & 0xff) | (color >> 8 & 0xff00)) / alpha_div,
.green = ((color >> 8 & 0xff) | (color >> 0 & 0xff00)) / alpha_div,
.blue = ((color >> 0 & 0xff) | (color << 8 & 0xff00)) / alpha_div,
.alpha = alpha,
};
}
static void
expose(const struct exposable *exposable, cairo_t *cr, int x, int y, int height)
{
exposable_render_deco(exposable, cr, x, y, height);
const struct eprivate *e = exposable->private;
const struct font *font = exposable->particle->font;
if (e->num_glyphs == -1)
if (e->num_glyphs == 0)
return;
/*
@ -108,63 +109,55 @@ expose(const struct exposable *exposable, cairo_t *cr, int x, int y, int height)
* font family.
*/
const double baseline = (double)y +
(double)(height + e->fextents.ascent + e->fextents.descent) / 2.0 -
(e->fextents.descent > 0 ? e->fextents.descent : 0);
(double)(height + font->fextents.ascent + font->fextents.descent) / 2.0 -
(font->fextents.descent > 0 ? font->fextents.descent : 0);
/* Adjust glyph offsets */
/* TODO: get rid of cairo?... */
cairo_surface_t *surf = cairo_get_target(cr);
cairo_surface_flush(surf);
pixman_image_t *pix = pixman_image_create_bits_no_clear(
PIXMAN_a8r8g8b8,
cairo_image_surface_get_width(surf),
cairo_image_surface_get_height(surf),
(uint32_t *)cairo_image_surface_get_data(surf),
cairo_image_surface_get_stride(surf));
uint32_t hex_color =
(uint32_t)(uint8_t)(exposable->particle->foreground.red * 255) << 16 |
(uint32_t)(uint8_t)(exposable->particle->foreground.green * 255) << 8 |
(uint32_t)(uint8_t)(exposable->particle->foreground.blue * 255) << 0;
uint16_t alpha = exposable->particle->foreground.alpha * 65535;
pixman_color_t fg = color_hex_to_pixman_with_alpha(hex_color, alpha);
x += exposable->particle->left_margin;
/* Loop glyphs and render them, one by one */
for (int i = 0; i < e->num_glyphs; i++) {
e->glyphs[i].x += x + exposable->particle->left_margin;
e->glyphs[i].y += baseline;
const struct glyph *glyph = e->glyphs[i];
assert(glyph != NULL);
if (pixman_image_get_format(glyph->pix) == PIXMAN_a8r8g8b8) {
/* Glyph surface is a pre-rendered image (typically a color emoji...) */
pixman_image_composite32(
PIXMAN_OP_OVER, glyph->pix, NULL, pix, 0, 0, 0, 0,
x + glyph->x, baseline - glyph->y,
glyph->width, glyph->height);
} else {
/* Glyph surface is an alpha mask */
pixman_image_t *src = pixman_image_create_solid_fill(&fg);
pixman_image_composite32(
PIXMAN_OP_OVER, src, glyph->pix, pix, 0, 0, 0, 0,
x + glyph->x, baseline - glyph->y,
glyph->width, glyph->height);
pixman_image_unref(src);
}
x += glyph->x_advance;
}
cairo_scaled_font_t *scaled = font_scaled_font(exposable->particle->font);
cairo_set_scaled_font(cr, scaled);
cairo_set_source_rgba(cr,
exposable->particle->foreground.red,
exposable->particle->foreground.green,
exposable->particle->foreground.blue,
exposable->particle->foreground.alpha);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_show_text_glyphs(
cr, e->text, -1, e->glyphs, e->num_glyphs,
e->clusters, e->num_clusters, e->cluster_flags);
#if 0
cairo_text_extents_t extents;
cairo_scaled_font_glyph_extents(scaled, e->glyphs, e->num_glyphs, &extents);
/* Bar center */
cairo_set_line_width(cr, 1);
cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 1.0);
cairo_move_to(cr, x, (double)y + (double)height / 2 + 0.5);
cairo_line_to(cr, x + extents.x_advance, (double)y + (double)height / 2 + 0.5);
cairo_stroke(cr);
/* Ascent */
cairo_set_source_rgba(cr, 0.0, 1.0, 0.0, 1.0);
cairo_move_to(cr, x, baseline - e->fextents.ascent + 0.5);
cairo_line_to(cr, x + extents.x_advance, baseline - e->fextents.ascent + 0.5);
cairo_stroke(cr);
/* Descent */
cairo_set_source_rgba(cr, 0.0, 0.0, 1.0, 1.0);
cairo_move_to(cr, x, baseline + e->fextents.descent + 0.5);
cairo_line_to(cr, x + extents.x_advance, baseline + e->fextents.descent + 0.5);
cairo_stroke(cr);
/* Height (!= ascent + descent) */
cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
cairo_move_to(cr, x - 3 + 0.5, (double)y + (double)(height - e->fextents.height) / 2);
cairo_line_to(cr, x - 3 + 0.5, (double)y + (double)(height + e->fextents.height) / 2);
cairo_stroke(cr);
/* Height (ascent + descent) */
cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 1.0);
cairo_move_to(cr, x - 1 + 0.5, (double)y + (double)(height - (e->fextents.ascent + e->fextents.descent)) / 2);
cairo_line_to(cr, x - 1 + 0.5, (double)y + (double)(height + (e->fextents.ascent + e->fextents.descent)) / 2);
cairo_stroke(cr);
#endif
pixman_image_unref(pix);
cairo_surface_mark_dirty(surf);
}
static struct exposable *
@ -174,8 +167,8 @@ instantiate(const struct particle *particle, const struct tag_set *tags)
struct eprivate *e = calloc(1, sizeof(*e));
e->text = tags_expand_template(p->text, tags);
e->num_glyphs = -1;
e->num_clusters = -1;
e->glyphs = NULL;
e->num_glyphs = 0;
if (p->max_len > 0) {
const size_t len = strlen(e->text);

9
stride.h Normal file
View file

@ -0,0 +1,9 @@
#pragma once
#include <pixman.h>
static inline int
stride_for_format_and_width(pixman_format_code_t format, int width)
{
return (((PIXMAN_FORMAT_BPP(format) * width + 7) / 8 + 4 - 1) & -4);
}