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font rendering demo: Make boxes optional

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This commit is contained in:
Matthias Clasen 2019-07-26 00:30:36 -04:00
parent 108ea50179
commit 8b1f3936b6
2 changed files with 84 additions and 35 deletions
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80
demos/gtk-demo/fontrendering.c
View File

@ -14,6 +14,8 @@ static GtkWidget *hint_metrics = NULL;
static GtkWidget *up_button = NULL;
static GtkWidget *down_button = NULL;
static GtkWidget *text_radio = NULL;
static GtkWidget *show_grid = NULL;
static GtkWidget *show_extents = NULL;
static PangoContext *context;
@ -112,46 +114,54 @@ update_image (void)
cr = cairo_create (surface);
cairo_set_line_width (cr, 1);
cairo_set_source_rgba (cr, 0.2, 0, 0, 0.2);
for (i = 1; i < ink.height + 20; i++)
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (show_grid)))
{
cairo_move_to (cr, 0, scale * i - 0.5);
cairo_line_to (cr, scale * (ink.width + 20), scale * i - 0.5);
cairo_stroke (cr);
cairo_set_source_rgba (cr, 0.2, 0, 0, 0.2);
for (i = 1; i < ink.height + 20; i++)
{
cairo_move_to (cr, 0, scale * i - 0.5);
cairo_line_to (cr, scale * (ink.width + 20), scale * i - 0.5);
cairo_stroke (cr);
}
for (i = 1; i < ink.width + 20; i++)
{
cairo_move_to (cr, scale * i - 0.5, 0);
cairo_line_to (cr, scale * i - 0.5, scale * (ink.height + 20));
cairo_stroke (cr);
}
}
for (i = 1; i < ink.width + 20; i++)
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (show_extents)))
{
cairo_move_to (cr, scale * i - 0.5, 0);
cairo_line_to (cr, scale * i - 0.5, scale * (ink.height + 20));
cairo_set_source_rgba (cr, 0, 0, 1, 1);
cairo_rectangle (cr,
scale * (10 + pango_units_to_double (logical.x)) - 0.5,
scale * (10 + pango_units_to_double (logical.y)) - 0.5,
scale * pango_units_to_double (logical.width) + 1,
scale * pango_units_to_double (logical.height) + 1);
cairo_stroke (cr);
cairo_move_to (cr, scale * (10 + pango_units_to_double (logical.x)) - 0.5,
scale * (10 + pango_units_to_double (baseline)) - 0.5);
cairo_line_to (cr, scale * (10 + pango_units_to_double (logical.x + logical.width)) + 1,
scale * (10 + pango_units_to_double (baseline)) - 0.5);
cairo_stroke (cr);
cairo_set_source_rgba (cr, 1, 0, 0, 1);
cairo_rectangle (cr,
scale * (10 + pango_units_to_double (pink.x)) + 0.5,
scale * (10 + pango_units_to_double (pink.y)) + 0.5,
scale * pango_units_to_double (pink.width) - 1,
scale * pango_units_to_double (pink.height) - 1);
cairo_stroke (cr);
}
cairo_set_source_rgba (cr, 0, 0, 1, 1);
cairo_rectangle (cr,
scale * (10 + pango_units_to_double (logical.x)) - 0.5,
scale * (10 + pango_units_to_double (logical.y)) - 0.5,
scale * pango_units_to_double (logical.width) + 1,
scale * pango_units_to_double (logical.height) + 1);
cairo_stroke (cr);
cairo_move_to (cr, scale * (10 + pango_units_to_double (logical.x)) - 0.5,
scale * (10 + pango_units_to_double (baseline)) - 0.5);
cairo_line_to (cr, scale * (10 + pango_units_to_double (logical.x + logical.width)) + 1,
scale * (10 + pango_units_to_double (baseline)) - 0.5);
cairo_stroke (cr);
cairo_set_source_rgba (cr, 1, 0, 0, 1);
cairo_rectangle (cr,
scale * (10 + pango_units_to_double (pink.x)) + 0.5,
scale * (10 + pango_units_to_double (pink.y)) + 0.5,
scale * pango_units_to_double (pink.width) - 1,
scale * pango_units_to_double (pink.height) - 1);
cairo_stroke (cr);
cairo_surface_destroy (surface);
cairo_destroy (cr);
}
else
{
PangoLayoutIter *iter;
PangoGlyphItem *run;
PangoLayoutRun *run;
PangoGlyphInfo *g;
int i, j;
@ -161,14 +171,14 @@ update_image (void)
pango_layout_get_extents (layout, &ink, &logical);
pango_extents_to_pixels (&logical, NULL);
iter = pango_layout_get_iter (layout);
run = pango_layout_iter_get_run (iter);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, logical.width * 3 / 2, 4*logical.height);
cr = cairo_create (surface);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
iter = pango_layout_get_iter (layout);
run = pango_layout_iter_get_run (iter);
cairo_set_source_rgb (cr, 0, 0, 0);
for (i = 0; i < 4; i++)
{
@ -252,7 +262,9 @@ do_fontrendering (GtkWidget *do_widget)
image = GTK_WIDGET (gtk_builder_get_object (builder, "image"));
hinting = GTK_WIDGET (gtk_builder_get_object (builder, "hinting"));
hint_metrics = GTK_WIDGET (gtk_builder_get_object (builder, "hint_metrics"));
text_radio = GTK_WIDGET (gtk_builder_get_object (builder, "text_radio"));
text_radio = GTK_WIDGET (gtk_builder_get_object (builder, "text_radio"));
show_grid = GTK_WIDGET (gtk_builder_get_object (builder, "show_grid"));
show_extents = GTK_WIDGET (gtk_builder_get_object (builder, "show_extents"));
g_signal_connect (up_button, "clicked", G_CALLBACK (scale_up), NULL);
g_signal_connect (down_button, "clicked", G_CALLBACK (scale_down), NULL);
@ -261,6 +273,8 @@ do_fontrendering (GtkWidget *do_widget)
g_signal_connect (hinting, "notify::active", G_CALLBACK (update_image), NULL);
g_signal_connect (hint_metrics, "notify::active", G_CALLBACK (update_image), NULL);
g_signal_connect (text_radio, "notify::active", G_CALLBACK (update_image), NULL);
g_signal_connect (show_grid, "notify::active", G_CALLBACK (update_image), NULL);
g_signal_connect (show_extents, "notify::active", G_CALLBACK (update_image), NULL);
update_image ();
}

39
demos/gtk-demo/fontrendering.ui
View File

@ -97,6 +97,40 @@
</layout>
</object>
</child>
<child>
<object class="GtkCheckButton" id="show_extents">
<property name="active">1</property>
<child>
<object class="GtkLabel">
<property name="label">Show Extents</property>
<style>
<class name="dim-label"/>
</style>
</object>
</child>
<layout>
<property name="left-attach">4</property>
<property name="top-attach">0</property>
</layout>
</object>
</child>
<child>
<object class="GtkCheckButton" id="show_grid">
<property name="active">1</property>
<child>
<object class="GtkLabel">
<property name="label">Show Grid</property>
<style>
<class name="dim-label"/>
</style>
</object>
</child>
<layout>
<property name="left-attach">4</property>
<property name="top-attach">1</property>
</layout>
</object>
</child>
<child>
<object class="GtkButton" id="up_button">
<property name="icon-name">list-add-symbolic</property>
@ -104,7 +138,8 @@
<class name="circular"/>
</style>
<layout>
<property name="left-attach">4</property>
<property name="left-attach">5</property>
<property name="top-attach">0</property>
</layout>
</object>
</child>
@ -115,7 +150,7 @@
<class name="circular"/>
</style>
<layout>
<property name="left-attach">4</property>
<property name="left-attach">5</property>
<property name="top-attach">1</property>
</layout>
</object>