forked from AuroraMiddleware/gtk
font rendering demo: Make boxes optional
This commit is contained in:
Matthias Clasen
parent
108ea50179
commit
8b1f3936b6
@ -14,6 +14,8 @@ static GtkWidget *hint_metrics = NULL;
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static GtkWidget *up_button = NULL;
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static GtkWidget *down_button = NULL;
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static GtkWidget *text_radio = NULL;
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static GtkWidget *show_grid = NULL;
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static GtkWidget *show_extents = NULL;
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static PangoContext *context;
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@ -112,46 +114,54 @@ update_image (void)
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cr = cairo_create (surface);
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cairo_set_line_width (cr, 1);
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cairo_set_source_rgba (cr, 0.2, 0, 0, 0.2);
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for (i = 1; i < ink.height + 20; i++)
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (show_grid)))
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{
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cairo_move_to (cr, 0, scale * i - 0.5);
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cairo_line_to (cr, scale * (ink.width + 20), scale * i - 0.5);
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cairo_stroke (cr);
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cairo_set_source_rgba (cr, 0.2, 0, 0, 0.2);
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for (i = 1; i < ink.height + 20; i++)
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{
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cairo_move_to (cr, 0, scale * i - 0.5);
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cairo_line_to (cr, scale * (ink.width + 20), scale * i - 0.5);
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cairo_stroke (cr);
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}
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for (i = 1; i < ink.width + 20; i++)
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{
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cairo_move_to (cr, scale * i - 0.5, 0);
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cairo_line_to (cr, scale * i - 0.5, scale * (ink.height + 20));
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cairo_stroke (cr);
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}
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}
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for (i = 1; i < ink.width + 20; i++)
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (show_extents)))
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{
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cairo_move_to (cr, scale * i - 0.5, 0);
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cairo_line_to (cr, scale * i - 0.5, scale * (ink.height + 20));
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cairo_set_source_rgba (cr, 0, 0, 1, 1);
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cairo_rectangle (cr,
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scale * (10 + pango_units_to_double (logical.x)) - 0.5,
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scale * (10 + pango_units_to_double (logical.y)) - 0.5,
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scale * pango_units_to_double (logical.width) + 1,
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scale * pango_units_to_double (logical.height) + 1);
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cairo_stroke (cr);
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cairo_move_to (cr, scale * (10 + pango_units_to_double (logical.x)) - 0.5,
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scale * (10 + pango_units_to_double (baseline)) - 0.5);
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cairo_line_to (cr, scale * (10 + pango_units_to_double (logical.x + logical.width)) + 1,
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scale * (10 + pango_units_to_double (baseline)) - 0.5);
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cairo_stroke (cr);
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cairo_set_source_rgba (cr, 1, 0, 0, 1);
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cairo_rectangle (cr,
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scale * (10 + pango_units_to_double (pink.x)) + 0.5,
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scale * (10 + pango_units_to_double (pink.y)) + 0.5,
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scale * pango_units_to_double (pink.width) - 1,
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scale * pango_units_to_double (pink.height) - 1);
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cairo_stroke (cr);
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}
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cairo_set_source_rgba (cr, 0, 0, 1, 1);
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cairo_rectangle (cr,
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scale * (10 + pango_units_to_double (logical.x)) - 0.5,
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scale * (10 + pango_units_to_double (logical.y)) - 0.5,
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scale * pango_units_to_double (logical.width) + 1,
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scale * pango_units_to_double (logical.height) + 1);
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cairo_stroke (cr);
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cairo_move_to (cr, scale * (10 + pango_units_to_double (logical.x)) - 0.5,
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scale * (10 + pango_units_to_double (baseline)) - 0.5);
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cairo_line_to (cr, scale * (10 + pango_units_to_double (logical.x + logical.width)) + 1,
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scale * (10 + pango_units_to_double (baseline)) - 0.5);
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cairo_stroke (cr);
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cairo_set_source_rgba (cr, 1, 0, 0, 1);
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cairo_rectangle (cr,
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scale * (10 + pango_units_to_double (pink.x)) + 0.5,
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scale * (10 + pango_units_to_double (pink.y)) + 0.5,
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scale * pango_units_to_double (pink.width) - 1,
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scale * pango_units_to_double (pink.height) - 1);
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cairo_stroke (cr);
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cairo_surface_destroy (surface);
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cairo_destroy (cr);
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}
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else
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{
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PangoLayoutIter *iter;
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PangoGlyphItem *run;
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PangoLayoutRun *run;
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PangoGlyphInfo *g;
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int i, j;
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@ -161,14 +171,14 @@ update_image (void)
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pango_layout_get_extents (layout, &ink, &logical);
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pango_extents_to_pixels (&logical, NULL);
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iter = pango_layout_get_iter (layout);
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run = pango_layout_iter_get_run (iter);
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surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, logical.width * 3 / 2, 4*logical.height);
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cr = cairo_create (surface);
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cairo_set_source_rgb (cr, 1, 1, 1);
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cairo_paint (cr);
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iter = pango_layout_get_iter (layout);
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run = pango_layout_iter_get_run (iter);
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cairo_set_source_rgb (cr, 0, 0, 0);
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for (i = 0; i < 4; i++)
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{
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@ -252,7 +262,9 @@ do_fontrendering (GtkWidget *do_widget)
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image = GTK_WIDGET (gtk_builder_get_object (builder, "image"));
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hinting = GTK_WIDGET (gtk_builder_get_object (builder, "hinting"));
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hint_metrics = GTK_WIDGET (gtk_builder_get_object (builder, "hint_metrics"));
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text_radio = GTK_WIDGET (gtk_builder_get_object (builder, "text_radio"));
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text_radio = GTK_WIDGET (gtk_builder_get_object (builder, "text_radio"));
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show_grid = GTK_WIDGET (gtk_builder_get_object (builder, "show_grid"));
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show_extents = GTK_WIDGET (gtk_builder_get_object (builder, "show_extents"));
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g_signal_connect (up_button, "clicked", G_CALLBACK (scale_up), NULL);
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g_signal_connect (down_button, "clicked", G_CALLBACK (scale_down), NULL);
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@ -261,6 +273,8 @@ do_fontrendering (GtkWidget *do_widget)
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g_signal_connect (hinting, "notify::active", G_CALLBACK (update_image), NULL);
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g_signal_connect (hint_metrics, "notify::active", G_CALLBACK (update_image), NULL);
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g_signal_connect (text_radio, "notify::active", G_CALLBACK (update_image), NULL);
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g_signal_connect (show_grid, "notify::active", G_CALLBACK (update_image), NULL);
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g_signal_connect (show_extents, "notify::active", G_CALLBACK (update_image), NULL);
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update_image ();
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}
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@ -97,6 +97,40 @@
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</layout>
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</object>
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</child>
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<child>
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<object class="GtkCheckButton" id="show_extents">
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<property name="active">1</property>
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<child>
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<object class="GtkLabel">
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<property name="label">Show Extents</property>
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<style>
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<class name="dim-label"/>
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</style>
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</object>
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</child>
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<layout>
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<property name="left-attach">4</property>
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<property name="top-attach">0</property>
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</layout>
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</object>
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</child>
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<child>
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<object class="GtkCheckButton" id="show_grid">
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<property name="active">1</property>
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<child>
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<object class="GtkLabel">
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<property name="label">Show Grid</property>
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<style>
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<class name="dim-label"/>
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</style>
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</object>
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</child>
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<layout>
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<property name="left-attach">4</property>
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<property name="top-attach">1</property>
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</layout>
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</object>
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</child>
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<child>
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<object class="GtkButton" id="up_button">
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<property name="icon-name">list-add-symbolic</property>
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@ -104,7 +138,8 @@
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<class name="circular"/>
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</style>
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<layout>
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<property name="left-attach">4</property>
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<property name="left-attach">5</property>
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<property name="top-attach">0</property>
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</layout>
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</object>
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</child>
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@ -115,7 +150,7 @@
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<class name="circular"/>
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</style>
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<layout>
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<property name="left-attach">4</property>
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<property name="left-attach">5</property>
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<property name="top-attach">1</property>
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</layout>
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</object>
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