64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
#include <stdlib.h>
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#include <cogl/cogl.h>
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#include <cogl-pango.h>
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#include <clutter/clutter.h>
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#define SHADOW_X_OFFSET 3
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#define SHADOW_Y_OFFSET 3
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static void
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_text_paint_cb (ClutterActor *actor)
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{
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ClutterText *text = CLUTTER_TEXT (actor);
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/* Get the PangoLayout that the Text actor is going to paint */
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PangoLayout *layout;
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layout = clutter_text_get_layout (text);
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/* Get the color of the text, to extract the alpha component */
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ClutterColor text_color = { 0, };
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clutter_text_get_color (text, &text_color);
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/* Composite the opacity so that the shadow is correctly blended */
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guint8 real_opacity;
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real_opacity = clutter_actor_get_paint_opacity (actor)
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* text_color.alpha
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/ 255;
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/* Create a #ccc color and premultiply it */
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CoglColor color;
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cogl_color_set_from_4ub (&color, 0xcc, 0xcc, 0xcc, real_opacity);
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cogl_color_premultiply (&color);
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/* Finally, render the Text layout at a given offset using the color */
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cogl_pango_render_layout (layout, SHADOW_X_OFFSET, SHADOW_Y_OFFSET, &color, 0);
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}
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int
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main (int argc, char *argv[])
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{
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clutter_init (&argc, &argv);
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ClutterActor *stage;
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stage = clutter_stage_new ();
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clutter_stage_set_title (CLUTTER_STAGE (stage), "Text shadow");
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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ClutterActor *text;
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text = clutter_text_new ();
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clutter_text_set_text (CLUTTER_TEXT (text), "Hello, World!");
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clutter_text_set_font_name (CLUTTER_TEXT (text), "Sans 64px");
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clutter_actor_add_constraint (text, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5));
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clutter_actor_add_constraint (text, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5));
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g_signal_connect (text, "paint", G_CALLBACK (_text_paint_cb), NULL);
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clutter_container_add (CLUTTER_CONTAINER (stage), text, NULL);
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clutter_actor_show (stage);
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clutter_main ();
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return EXIT_SUCCESS;
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}
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