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cookbook: Include the textures-reflection example code

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Add a section at the end of the recipe containing the full code of the
example.
This commit is contained in:
Emmanuele Bassi 2010-07-18 11:15:25 +01:00
parent 76d8119a7f
commit 0dac5e0557
1 changed files with 21 additions and 21 deletions
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42
doc/cookbook/textures.xml
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@ -1,7 +1,8 @@
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<chapter id="textures"> <chapter id="textures"
xmlns:xi="http://www.w3.org/2003/XInclude">
<title>Textures</title> <title>Textures</title>
<epigraph> <epigraph>
@ -525,25 +526,12 @@ main (int argc, char *argv[])
static void static void
_clone_paint_cb (ClutterActor *actor) _clone_paint_cb (ClutterActor *actor)
{ {
ClutterActor *source; /* ... */
ClutterActorBox box;
CoglHandle material;
gfloat width, height;
guint8 opacity;
CoglColor color_1, color_2;
CoglTextureVertex vertices[4];
/* if we don't have a source actor, don't paint */ /* get the Cogl material of the source texture */
source = clutter_clone_get_source (CLUTTER_CLONE (actor));
if (source == NULL)
goto out;
/* if the source texture does not have any content, don't paint */
material = clutter_texture_get_cogl_material (CLUTTER_TEXTURE (source)); material = clutter_texture_get_cogl_material (CLUTTER_TEXTURE (source));
if (material == NULL)
goto out;
/* set the size of the reflection to be the same as the source */ /* get the size of the actor, which will be used to size the reflection */
clutter_actor_get_allocation_box (actor, &box); clutter_actor_get_allocation_box (actor, &box);
clutter_actor_box_get_size (&box, &width, &height); clutter_actor_box_get_size (&box, &width, &height);
@ -558,7 +546,7 @@ _clone_paint_cb (ClutterActor *actor)
cogl_color_set_from_4f (&color_2, 1.0, 1.0, 1.0, 0.0); cogl_color_set_from_4f (&color_2, 1.0, 1.0, 1.0, 0.0);
cogl_color_premultiply (&color_2); cogl_color_premultiply (&color_2);
/* now describe the four vertices of the quad; since it has /* describe the four vertices of the quad; since it has
* to be a reflection, we need to invert it as well * to be a reflection, we need to invert it as well
*/ */
vertices[0].x = 0; vertices[0].y = 0; vertices[0].z = 0; vertices[0].x = 0; vertices[0].y = 0; vertices[0].z = 0;
@ -581,9 +569,7 @@ _clone_paint_cb (ClutterActor *actor)
cogl_set_source (material); cogl_set_source (material);
cogl_polygon (vertices, 4, TRUE); cogl_polygon (vertices, 4, TRUE);
out: /* ... */
/* prevent the default clone handler from running */
g_signal_stop_emission_by_name (actor, "paint");
} }
int int
@ -703,6 +689,20 @@ typedef struct _CoglTextureVertex {
for this operation.</para></note> for this operation.</para></note>
</section> </section>
<section>
<title>Full example</title>
<example id="textures-reflection-example">
<title>Creating a glassy reflection of a texture</title>
<programlisting>
<xi:include href="examples/textures-reflection.c" parse="text">
<xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
</xi:include>
</programlisting>
</example>
</section>
</section> </section>
</chapter> </chapter>