+++ /dev/null
-#include <clutter/clutter.h>
-
-#include <errno.h>
-#include <stdlib.h>
-#include <glib.h>
-#include <gmodule.h>
-
-/* Dynamic branching appeared in "Shader Model 3.0" that low-end IGPs
- * don't support.
- */
-#define GPU_SUPPORTS_DYNAMIC_BRANCHING 0
-
-typedef struct
-{
- gchar *name;
- gchar *source;
-} ShaderSource;
-
-/* a couple of boilerplate defines that are common amongst all the
- * sample shaders
- */
-
-/* FRAGMENT_SHADER_BEGIN: generate boilerplate with a local vec4 color already
- * initialized, from a sampler2D in a variable tex.
- */
-#define FRAGMENT_SHADER_VARS \
- "uniform sampler2D tex;" \
- "uniform float x_step, y_step;" \
-
-#define FRAGMENT_SHADER_BEGIN \
- "void main (){" \
- " vec4 color = texture2D (tex, vec2(cogl_tex_coord_in[0]));"
-
-/* FRAGMENT_SHADER_END: apply the changed color to the output buffer correctly
- * blended with the gl specified color (makes the opacity of actors work
- * correctly).
- */
-#define FRAGMENT_SHADER_END \
- " cogl_color_out = color * cogl_color_in;" \
- "}"
-
-static ShaderSource shaders[]=
- {
- {"brightness-contrast",
- FRAGMENT_SHADER_VARS
- "uniform float brightness, contrast;"
- FRAGMENT_SHADER_BEGIN
- " color.rgb /= color.a;"
- " color.rgb = (color.rgb - vec3(0.5, 0.5, 0.5)) * contrast + "
- "vec3 (brightness + 0.5, brightness + 0.5, brightness + 0.5);"
- " color.rgb *= color.a;"
- FRAGMENT_SHADER_END
- },
-
- {"box-blur",
- FRAGMENT_SHADER_VARS
-
-#if GPU_SUPPORTS_DYNAMIC_BRANCHING
- "uniform float radius;"
- FRAGMENT_SHADER_BEGIN
- "float u, v;"
- "int count = 1;"
- "for (u=-radius;u<radius;u++)"
- " for (v=-radius;v<radius;v++)"
- " {"
- " color += texture2D(tex, "
- " vec2(cogl_tex_coord_in[0].s + u * 2.0 * x_step, "
- " cogl_tex_coord_in[0].t + v * 2.0 * y_step));"
- " count ++;"
- " }"
- "color = color / float(count);"
- FRAGMENT_SHADER_END
-#else
- "vec4 get_rgba_rel(sampler2D tex, float dx, float dy)"
- "{"
- " return texture2D (tex, cogl_tex_coord_in[0].st "
- " + vec2(dx, dy) * 2.0);"
- "}"
-
- FRAGMENT_SHADER_BEGIN
- " float count = 1.0;"
- " color += get_rgba_rel (tex, -x_step, -y_step); count++;"
- " color += get_rgba_rel (tex, -x_step, 0.0); count++;"
- " color += get_rgba_rel (tex, -x_step, y_step); count++;"
- " color += get_rgba_rel (tex, 0.0, -y_step); count++;"
- " color += get_rgba_rel (tex, 0.0, 0.0); count++;"
- " color += get_rgba_rel (tex, 0.0, y_step); count++;"
- " color += get_rgba_rel (tex, x_step, -y_step); count++;"
- " color += get_rgba_rel (tex, x_step, 0.0); count++;"
- " color += get_rgba_rel (tex, x_step, y_step); count++;"
- " color = color / count;"
- FRAGMENT_SHADER_END
-#endif
- },
-
- {"invert",
- FRAGMENT_SHADER_VARS
- FRAGMENT_SHADER_BEGIN
- " color.rgb /= color.a;"
- " color.rgb = vec3(1.0, 1.0, 1.0) - color.rgb;\n"
- " color.rgb *= color.a;"
- FRAGMENT_SHADER_END
- },
-
- {"brightness-contrast",
- FRAGMENT_SHADER_VARS
- "uniform float brightness;"
- "uniform float contrast;"
- FRAGMENT_SHADER_BEGIN
- " color.rgb /= color.a;"
- " color.r = (color.r - 0.5) * contrast + brightness + 0.5;"
- " color.g = (color.g - 0.5) * contrast + brightness + 0.5;"
- " color.b = (color.b - 0.5) * contrast + brightness + 0.5;"
- " color.rgb *= color.a;"
- FRAGMENT_SHADER_END
- },
-
- {"gray",
- FRAGMENT_SHADER_VARS
- FRAGMENT_SHADER_BEGIN
- " float avg = (color.r + color.g + color.b) / 3.0;"
- " color.r = avg;"
- " color.g = avg;"
- " color.b = avg;"
- FRAGMENT_SHADER_END
- },
-
- {"combined-mirror",
- FRAGMENT_SHADER_VARS
- FRAGMENT_SHADER_BEGIN
- " vec4 colorB = texture2D (tex, vec2(cogl_tex_coord_in[0].ts));"
- " float avg = (color.r + color.g + color.b) / 3.0;"
- " color.r = avg;"
- " color.g = avg;"
- " color.b = avg;"
- " color = (color + colorB)/2.0;"
- FRAGMENT_SHADER_END
- },
-
- {"edge-detect",
- FRAGMENT_SHADER_VARS
- "float get_avg_rel(sampler2D texB, float dx, float dy)"
- "{"
- " vec4 colorB = texture2D (texB, cogl_tex_coord_in[0].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}
-};
-
-static gint shader_no = 0;
-
-static int
-next_p2 (gint a)
-{
- int rval = 1;
-
- while (rval < a)
- rval <<= 1;
-
- return rval;
-}
-
-static void
-set_shader_num (ClutterActor *actor, gint new_no)
-{
- int tex_width;
- int tex_height;
-
- if (new_no >= 0 && shaders[new_no].name)
- {
- ClutterShader *shader;
- GError *error;
- shader_no = new_no;
-
- g_print ("setting shaders[%i] named '%s'\n",
- shader_no,
- shaders[shader_no].name);
-
- shader = clutter_shader_new ();
-
- error = NULL;
- g_object_set (G_OBJECT (shader),
- "fragment-source", shaders[shader_no].source,
- NULL);
-
- /* try to bind the shader, provoking an error we catch if there is issues
- * with the shader sources we've provided. At a later stage it should be
- * possible to iterate through a set of alternate shader sources (glsl ->
- * asm -> cg?) and the one that succesfully compiles is used.
- */
- clutter_shader_compile (shader, &error);
- if (error)
- {
- g_print ("unable to set shaders[%i] named '%s': %s",
- shader_no, shaders[shader_no].name,
- error->message);
- g_error_free (error);
- clutter_actor_set_shader (actor, NULL);
- }
- else
- {
- clutter_actor_set_shader (actor, NULL);
- clutter_actor_set_shader (actor, shader);
- clutter_actor_set_shader_param_int (actor, "tex", 0);
- clutter_actor_set_shader_param_float (actor, "radius", 3.0);
- clutter_actor_set_shader_param_float (actor, "brightness", 0.4);
- clutter_actor_set_shader_param_float (actor, "contrast", -1.9);
-
- if (CLUTTER_IS_TEXTURE (actor))
- {
- /* XXX - this assumes *a lot* about how things are done
- * internally on *some* hardware and driver
- */
- tex_width = clutter_actor_get_width (actor);
- tex_width = next_p2 (tex_width);
-
- tex_height = clutter_actor_get_height (actor);
- tex_height = next_p2 (tex_height);
-
- clutter_actor_set_shader_param_float (actor, "x_step",
- 1.0f / tex_width);
- clutter_actor_set_shader_param_float (actor, "y_step",
- 1.0f / tex_height);
- }
- }
-
- g_object_unref (shader);
- }
-}
-
-static gboolean
-button_release_cb (ClutterActor *actor,
- ClutterEvent *event,
- gpointer data)
-{
- gint new_no;
-
- if (event->button.button == 1)
- {
- new_no = shader_no - 1;
- }
- else
- {
- new_no = shader_no + 1;
- }
-
- set_shader_num (actor, new_no);
-
- return CLUTTER_EVENT_STOP;
-}
-
-#ifdef COGL_HAS_GLES2
-static gboolean
-timeout_cb (gpointer data)
-{
- int new_no = shader_no + 1;
-
- if (shaders[new_no].name == NULL)
- new_no = 0;
-
- set_shader_num (CLUTTER_ACTOR (data), new_no);
-
- return G_SOURCE_CONTINUE;
-}
-#endif /* COGL_HAS_GLES2 */
-
-G_MODULE_EXPORT gint
-test_shader_main (gint argc, gchar *argv[])
-{
- ClutterActor *actor;
- ClutterActor *stage;
- ClutterColor stage_color = { 0x61, 0x64, 0x8c, 0xff };
- ClutterShader *shader;
- GError *error;
- gchar *file;
-
- if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
- return 1;
-
- stage = clutter_stage_new ();
- clutter_stage_set_title (CLUTTER_STAGE (stage), "Shaders");
- clutter_actor_set_size (stage, 512, 384);
- g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
-
- g_print ("applying shaders[%i] named '%s'\n",
- shader_no,
- shaders[shader_no].name);
-
- shader = clutter_shader_new ();
-
- error = NULL;
- clutter_shader_set_fragment_source (shader, shaders[shader_no].source, -1);
- clutter_shader_compile (shader, &error);
- if (error)
- {
- g_print ("unable to load shaders[%d] named '%s': %s\n",
- shader_no,
- shaders[shader_no].name,
- error->message);
- g_error_free (error);
-
- return EXIT_FAILURE;
- }
-
- clutter_stage_set_title (CLUTTER_STAGE (stage), "Shader Test");
- clutter_actor_set_background_color (stage, &stage_color);
-
- file = g_build_filename (TESTS_DATADIR, "redhand.png", NULL);
-
-#ifndef TEST_GROUP
- actor = clutter_texture_new_from_file (file, &error);
- if (!actor)
- g_error("pixbuf load failed: %s", error ? error->message : "Unknown");
-#else
- actor = clutter_group_new ();
-
- {
- ClutterActor *child1, *child2, *child3, *child4;
- ClutterColor color = { 0xff, 0x22, 0x66, 0x99 };
-
- child1 = clutter_texture_new_from_file (file, &error);
- if (!child1)
- g_error("pixbuf load failed: %s", error ? error->message : "Unknown");
-
- child2 = clutter_texture_new_from_file (file, &error);
- if (!child2)
- g_error("pixbuf load failed: %s", error ? error->message : "Unknown");
-
- child3 = clutter_rectangle_new ();
- child4 = clutter_text_new_with_text ("Sans 20px", "Shady stuff");
-
- clutter_rectangle_set_color (CLUTTER_RECTANGLE (child3), &color);
- clutter_actor_set_size (child3, 50, 50);
-
- clutter_actor_set_position (child1, 0, 0);
- clutter_actor_set_position (child2, 50, 100);
- clutter_actor_set_position (child3, 30, -30);
- clutter_actor_set_position (child4, -50, 20);
-
- clutter_container_add (CLUTTER_CONTAINER (actor),
- child1,
- child2,
- child3,
- child4,
- NULL);
-
- clutter_actor_show_all (actor);
- }
-#endif /* !TEST_GROUP */
-
- g_free (file);
-
- clutter_actor_set_shader (actor, shader);
- clutter_actor_set_position (actor, 100, 100);
-
- g_object_unref (shader);
-
- clutter_container_add_actor (CLUTTER_CONTAINER (stage), actor);
-
- clutter_actor_set_shader_param_int (actor, "tex", 0);
- clutter_actor_set_shader_param_float (actor, "brightness", 0.4);
- clutter_actor_set_shader_param_float (actor, "contrast", -1.9);
-
- clutter_actor_set_reactive (actor, TRUE);
- g_signal_connect (actor, "button-release-event",
- G_CALLBACK (button_release_cb), NULL);
-
-#ifdef COGL_HAS_GLES2
- /* On an embedded platform it is difficult to right click so we will
- cycle through the shaders automatically */
- clutter_threads_add_timeout (3000, timeout_cb, actor);
-#endif
-
- /* Show everying ( and map window ) */
- clutter_actor_show_all (stage);
-
- clutter_main ();
-
- return EXIT_SUCCESS;
-}
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