fdo-mirrors/cairo
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/cairo/cairo.git synced 2026-05-08 07:58:02 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Cache rounded glyph advance values

Browse source 
This is done in cairo_scaled_glyph_t->x/y_advance.  The value is mostly useful
for raster backends, for example to set as default advance of a glyph, and
later on optimize glyph positionings that use the default advance.
This commit is contained in:
Behdad Esfahbod 2006-12-11 03:16:50 -05:00
parent e7ed9eee76
commit 198c1439ab
2 changed files with 12 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
src/cairo-scaled-font.c
View file

@ -1211,6 +1211,7 @@ _cairo_scaled_glyph_set_metrics (cairo_scaled_glyph_t *scaled_glyph,
double hm, wm;
double min_user_x = 0.0, max_user_x = 0.0, min_user_y = 0.0, max_user_y = 0.0;
double min_device_x = 0.0, max_device_x = 0.0, min_device_y = 0.0, max_device_y = 0.0;
double device_x_advance, device_y_advance;
for (hm = 0.0; hm <= 1.0; hm += 1.0)
for (wm = 0.0; wm <= 1.0; wm += 1.0) {
@ -1259,10 +1260,19 @@ _cairo_scaled_glyph_set_metrics (cairo_scaled_glyph_t *scaled_glyph,
&scaled_glyph->metrics.x_advance,
&scaled_glyph->metrics.y_advance);
device_x_advance = fs_metrics->x_advance;
device_y_advance = fs_metrics->y_advance;
cairo_matrix_transform_distance (&scaled_font->scale,
&device_x_advance,
&device_y_advance);
scaled_glyph->bbox.p1.x = _cairo_fixed_from_double (min_device_x);
scaled_glyph->bbox.p1.y = _cairo_fixed_from_double (min_device_y);
scaled_glyph->bbox.p2.x = _cairo_fixed_from_double (max_device_x);
scaled_glyph->bbox.p2.y = _cairo_fixed_from_double (max_device_y);
scaled_glyph->x_advance = _cairo_lround (device_x_advance);
scaled_glyph->y_advance = _cairo_lround (device_y_advance);
}
void

2
src/cairoint.h
View file

@ -511,6 +511,8 @@ typedef struct _cairo_scaled_glyph {
cairo_scaled_font_t *scaled_font; /* font the glyph lives in */
cairo_text_extents_t metrics; /* user-space metrics */
cairo_box_t bbox; /* device-space bounds */
int16_t x_advance; /* device-space rounded X advance */
int16_t y_advance; /* device-space rounded Y advance */
cairo_image_surface_t *surface; /* device-space image */
cairo_path_fixed_t *path; /* device-space outline */
void *surface_private; /* for the surface backend */