static void
shader_paint (ClutterEffect *effect,
ClutterEffectPaintFlags flags)
{
ClutterShaderEffect *shader = CLUTTER_SHADER_EFFECT (effect);
float tex_width;
ClutterActor *actor =
clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
if (g_test_verbose ())
g_debug ("shader_paint");
clutter_shader_effect_set_shader_source (shader,
"uniform sampler2D tex;\n"
"uniform float step;\n"
"void main (void)\n"
"{\n"
" gl_FragColor = texture2D(tex, vec2 (gl_TexCoord[0].s + step,\n"
" gl_TexCoord[0].t));\n"
"}\n");
tex_width = clutter_actor_get_width (actor);
clutter_shader_effect_set_uniform (shader, "tex", G_TYPE_INT, 1, 0);
clutter_shader_effect_set_uniform (shader, "step", G_TYPE_FLOAT, 1,
SHIFT_STEP / tex_width);
CLUTTER_EFFECT_CLASS (shift_effect_parent_class)->paint (effect, flags);
}
void Animation::loadShader(const char *fragment_path) {
std::string fragShaderStr = readFile(fragment_path);
const gchar *fragShaderSrc = fragShaderStr.c_str();
// Pop off the old shader:
unloadShader();
printf("Loading shader: '%s' \n", fragment_path);
// Setup the GLSL Fragment shaders that we'll use to generate colors
// Build a GLSL Fragment shader to affect the color output (to the screen at least for now)
shaderEffect = clutter_shader_effect_new(CLUTTER_FRAGMENT_SHADER);
clutter_shader_effect_set_shader_source(CLUTTER_SHADER_EFFECT(shaderEffect), fragShaderSrc);
// Start fuckups:
// ClutterEffect *effect = clutter_blur_effect_new (); // works
// ClutterEffect *effect = clutter_sensatron_effect_new ();
// clutter_sensatron_effect_set_shader_source(CLUTTER_SENSATRON_EFFECT(effect), fragShaderSrc);
// Now, let's try attaching a texture to this bitch!!
// CoglTexture *texture = cogl_texture_new_from_file(textureFile,
// COGL_TEXTURE_NONE,
// COGL_PIXEL_FORMAT_ANY,
// &error);
// Try attaching the texture to the effect (on the 1th layer?):
// cogl_pipeline_set_layer_texture (priv->pipeline, 1, texture);
// CoglPipeline *target;
// target = COGL_PIPELINE (clutter_offscreen_effect_get_target ((ClutterOffscreenEffect)shaderEffect));
// End fuckups
// Bind uniforms to the shader so we can hand variables into them
animationTime = 0.0;
currentSpeed = 100;
clutter_shader_effect_set_uniform(CLUTTER_SHADER_EFFECT(shaderEffect), "iGlobalTime", G_TYPE_FLOAT, 1, animationTime);
clutter_shader_effect_set_uniform(CLUTTER_SHADER_EFFECT(shaderEffect), "iResolution", G_TYPE_FLOAT, 2, HEIGHT*osd_scale, WIDTH*osd_scale);
clutter_shader_effect_set_uniform(CLUTTER_SHADER_EFFECT(shaderEffect), "iMouse", G_TYPE_FLOAT, 2, input_x*osd_scale, input_y*osd_scale);
// clutter_shader_effect_set_uniform(CLUTTER_SHADER_EFFECT(shaderEffect), "iChannel0", CLUTTER_TYPE_SHADER_FLOAT, 1, audioTexture);
// clutter_shader_effect_set_uniform(CLUTTER_SHADER_EFFECT(shaderEffect), "iChannel1", CLUTTER_TYPE_SHADER_FLOAT, 1, noiseTexture);
// Set the effect live on the on screen display actor...
clutter_actor_add_effect(shaderOutput, shaderEffect);
// clutter_actor_add_effect(shaderOutput, effect);
shaderLoaded = true;
}
