def __init__(self):
self.stage = Clutter.Stage()
r = Clutter.Texture.new_from_file("test.jpg")
r.set_size(640, 480)
self.stage.add_actor(r)
shader = Clutter.Shader()
source = open(__file__.replace(".py", ".glsl"), "r").read()
shader.set_fragment_source(source, len(source))
#shader.set_uniform("image", 0) # warning?
r.set_shader(shader)
self.stage.show()
def button_release_cb(actor, event, data):
# If we've been run once, we'll figure out which one to use next.
if hasattr(actor, "shader_name"):
index = SHADER_KEYS.index(actor.shader_name)
# Go back to the beginning.
if index == len(SHADER_KEYS) - 1:
actor.shader_name = next(iter(SHADERS))
# Go to the next one.
else:
actor.shader_name = SHADER_KEYS[index + 1]
# Otherwise, this must be the first time the callback has been run.
# We'll start with the first iterative one.
else:
actor.shader_name = next(iter(SHADERS))
print("Shader: %s" % actor.shader_name)
# Shaders couldn't be easier to work with in Clutter. We'll start with our
# basic brightness-contrast-1 example, and iterate from there when the user
# clicks on the window.
shader = Clutter.Shader()
shader.set_fragment_source(SHADERS[actor.shader_name], -1)
shader.compile()
# We're going to "brute-force" the shaders here by setting every possible
# parameter, rather than those only needed per each shader.
actor.set_shader(shader)
actor.set_shader_param_int("tex", 0)
actor.set_shader_param_float("brightness", 0.4)
actor.set_shader_param_float("contrast", -1.9)
actor.set_shader_param_float("radius", 3.0)
np2 = lambda n: 2 ** math.ceil(math.log(n, 2))
actor.set_shader_param_float("x_step", 1.0 / np2(actor.get_width()))
actor.set_shader_param_float("x_step", 1.0 / np2(actor.get_height()))
