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cookbook: Add an empty recipe for shadows under text

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Currently, it's just an example and an image, but it should be easy to
flesh it out properly for the "Text" chapter.
This commit is contained in:
Emmanuele Bassi
2010-07-18 10:56:35 +01:00
parent bb3dc013bf
commit 90b74458d2
7 changed files with 105 additions and 0 deletions
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1
doc/cookbook/examples/.gitignore vendored
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@ -1 +1,2 @@
/text-shadow
/textures-reflection

3
doc/cookbook/examples/Makefile.am
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@ -4,6 +4,7 @@ NULL =
noinst_PROGRAMS = \
textures-reflection \
text-shadow \
$(NULL)
INCLUDES = \
@ -26,3 +27,5 @@ AM_CFLAGS = \
AM_LDFLAGS = $(CLUTTER_LIBS)
textures_reflection_SOURCES = textures-reflection.c
text_shadow_SOURCES = text-shadow.c

59
doc/cookbook/examples/text-shadow.c Normal file
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@ -0,0 +1,59 @@
#include <stdlib.h>
#include <cogl/cogl.h>
#include <cogl-pango.h>
#include <clutter/clutter.h>
#define SHADOW_X_OFFSET 3
#define SHADOW_Y_OFFSET 3
static void
_text_paint_cb (ClutterActor *actor)
{
ClutterText *text = CLUTTER_TEXT (actor);
ClutterActorBox alloc = { 0, };
clutter_actor_get_allocation_box (actor, &alloc);
PangoLayout *layout;
layout = clutter_text_get_layout (text);
ClutterColor text_color = { 0, };
clutter_text_get_color (text, &text_color);
guint8 real_opacity;
real_opacity = clutter_actor_get_paint_opacity (actor)
* text_color.alpha
/ 255;
CoglColor color;
cogl_color_set_from_4ub (&color, 0xcc, 0xcc, 0xcc, real_opacity);
cogl_pango_render_layout (layout, SHADOW_X_OFFSET, SHADOW_Y_OFFSET, &color, 0);
}
int
main (int argc, char *argv[])
{
clutter_init (&argc, &argv);
ClutterActor *stage;
stage = clutter_stage_new ();
clutter_stage_set_title (CLUTTER_STAGE (stage), "Text shadow");
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
ClutterActor *text;
text = clutter_text_new ();
clutter_text_set_text (CLUTTER_TEXT (text), "Hello, World!");
clutter_text_set_font_name (CLUTTER_TEXT (text), "Sans 64px");
clutter_actor_add_constraint (text, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5));
clutter_actor_add_constraint (text, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5));
g_signal_connect (text, "paint", G_CALLBACK (_text_paint_cb), NULL);
clutter_container_add (CLUTTER_CONTAINER (stage), text, NULL);
clutter_actor_show (stage);
clutter_main ();
return EXIT_SUCCESS;
}