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* tests/test-shader.c: (main):

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Add a new shader to test-shaders (Sobel operator edge-detect)
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Chris Lord 2008-06-30 14:19:04 +00:00
parent 5525d0cad7
commit 39da95c421
2 changed files with 43 additions and 10 deletions
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ChangeLog
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@ -1,3 +1,8 @@
2008-06-30 Chris Lord <chris@openedhand.com>
* tests/test-shader.c: (main):
Add a new shader to test-shaders (Sobel operator edge-detect)
2008-06-30 Øyvind Kolås <pippin@o-hand.com>
Disable XInput handling for keyboard events, re-enabling key press and

48
tests/test-shader.c
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@ -153,6 +153,44 @@ static ShaderSource shaders[]=
" color = (color + colorB)/2.0;"
FRAGMENT_SHADER_END
},
{"edge-detect",
FRAGMENT_SHADER_VARS
"float get_avg_rel(sampler2D texB, float dx, float dy)"
"{"
" vec3 colorB = texture2D (texB, " TEX_COORD ".st + vec2(dx, dy));"
" return (colorB.r + colorB.g + colorB.b) / 3.0;"
"}"
FRAGMENT_SHADER_BEGIN
" mat3 sobel_h = mat3( 1.0, 2.0, 1.0,"
" 0.0, 0.0, 0.0,"
" -1.0, -2.0, -1.0);"
" mat3 sobel_v = mat3( 1.0, 0.0, -1.0,"
" 2.0, 0.0, -2.0,"
" 1.0, 0.0, -1.0);"
" mat3 map = mat3( get_avg_rel(tex, -x_step, -y_step),"
" get_avg_rel(tex, -x_step, 0.0),"
" get_avg_rel(tex, -x_step, y_step),"
" get_avg_rel(tex, 0.0, -y_step),"
" get_avg_rel(tex, 0.0, 0.0),"
" get_avg_rel(tex, 0.0, y_step),"
" get_avg_rel(tex, x_step, -y_step),"
" get_avg_rel(tex, x_step, 0.0),"
" get_avg_rel(tex, x_step, y_step) );"
" mat3 gh = sobel_h * map;"
" mat3 gv = map * sobel_v;"
" float avgh = (gh[0][0] + gh[0][1] + gh[0][2] +"
" gh[1][0] + gh[1][1] + gh[1][2] +"
" gh[2][0] + gh[2][1] + gh[2][2]) / 18.0 + 0.5;"
" float avgv = (gv[0][0] + gv[0][1] + gv[0][2] +"
" gv[1][0] + gv[1][1] + gv[1][2] +"
" gv[2][0] + gv[2][1] + gv[2][2]) / 18.0 + 0.5;"
" float avg = (avgh + avgv) / 2.0;"
" color.r = avg * color.r;"
" color.g = avg * color.g;"
" color.b = avg * color.b;"
FRAGMENT_SHADER_END
},
/* Terminating NULL sentinel */
{NULL, NULL}
};
@ -259,7 +297,6 @@ gint
main (gint argc,
gchar *argv[])
{
ClutterTimeline *timeline;
ClutterActor *actor;
ClutterActor *stage;
ClutterColor stage_color = { 0x61, 0x64, 0x8c, 0xff };
@ -294,10 +331,6 @@ main (gint argc,
clutter_stage_set_title (CLUTTER_STAGE (stage), "Shader Test");
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
/* Create a timeline to manage animation */
timeline = clutter_timeline_new (360, 60); /* num frames, fps */
g_object_set (timeline, "loop", TRUE, NULL); /* have it loop */
#ifndef TEST_GROUP
actor = g_object_new (CLUTTER_TYPE_TEXTURE,
"filename", "redhand.png",
@ -357,14 +390,9 @@ main (gint argc,
g_timeout_add_seconds (3, timeout_cb, actor);
#endif
/*clutter_actor_set_opacity (actor, 0x77);*/
/* Show everying ( and map window ) */
clutter_actor_show_all (stage);
/* and start it */
clutter_timeline_start (timeline);
clutter_main ();
return EXIT_SUCCESS;