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gtk-demo: Improve ink extents rendering

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Show the pixel-aligned ink rectangle, so we can
see that it includes all the pixels that are inked.
This commit is contained in:
Matthias Clasen 2021-09-17 16:07:51 -04:00
parent 06db477847
commit 2c8e55605b
1 changed files with 5 additions and 6 deletions
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11
demos/gtk-demo/fontrendering.c
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@ -37,7 +37,7 @@ update_image (void)
const char *text; const char *text;
PangoFontDescription *desc; PangoFontDescription *desc;
PangoLayout *layout; PangoLayout *layout;
PangoRectangle ink, pink, logical; PangoRectangle ink, logical;
int baseline; int baseline;
cairo_surface_t *surface; cairo_surface_t *surface;
cairo_t *cr; cairo_t *cr;
@ -94,7 +94,6 @@ update_image (void)
pango_layout_set_font_description (layout, desc); pango_layout_set_font_description (layout, desc);
pango_layout_set_text (layout, text, -1); pango_layout_set_text (layout, text, -1);
pango_layout_get_extents (layout, &ink, &logical); pango_layout_get_extents (layout, &ink, &logical);
pink = ink;
baseline = pango_layout_get_baseline (layout); baseline = pango_layout_get_baseline (layout);
pango_extents_to_pixels (&ink, NULL); pango_extents_to_pixels (&ink, NULL);
@ -165,10 +164,10 @@ update_image (void)
cairo_stroke (cr); cairo_stroke (cr);
cairo_set_source_rgb (cr, 1, 0, 0); cairo_set_source_rgb (cr, 1, 0, 0);
cairo_rectangle (cr, cairo_rectangle (cr,
scale * (10 + pango_units_to_double (pink.x)) + 0.5, scale * (10 + ink.x) - 0.5,
scale * (10 + pango_units_to_double (pink.y)) + 0.5, scale * (10 + ink.y) - 0.5,
scale * pango_units_to_double (pink.width) - 1, scale * ink.width + 1,
scale * pango_units_to_double (pink.height) - 1); scale * ink.height + 1);
cairo_stroke (cr); cairo_stroke (cr);
} }