145 lines
4.5 KiB
GDScript
145 lines
4.5 KiB
GDScript
tool
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extends MMGenTexture
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class_name MMGenBuffer
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"""
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Texture generator buffers, that render their input in a specific resolution and provide the result as output.
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This is useful when using generators that sample their inputs several times
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"""
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var material : ShaderMaterial = null
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var updating : bool = false
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var update_again : bool = true
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var current_renderer = null
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var is_pending : bool = false
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var pending_textures = []
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func _ready() -> void:
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material = ShaderMaterial.new()
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material.shader = Shader.new()
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if !parameters.has("size"):
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parameters.size = 9
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add_to_group("preview")
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func _exit_tree() -> void:
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if current_renderer != null:
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current_renderer.release(self)
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func get_type() -> String:
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return "buffer"
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func get_type_name() -> String:
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return "Buffer"
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func get_parameter_defs() -> Array:
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return [
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{ name="size", type="size", first=4, last=12, default=4 },
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{ name="lod", type="float", min=0, max=10.0, step=0.01, default=0 }
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]
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func get_input_defs() -> Array:
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return [ { name="in", type="rgba" } ]
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func get_output_defs() -> Array:
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return [ { type="rgba" }, { type="rgba" } ]
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func source_changed(_input_port_index : int) -> void:
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call_deferred("update_shader")
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func all_sources_changed() -> void:
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call_deferred("update_shader")
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func update_shader() -> void:
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var context : MMGenContext = MMGenContext.new()
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var source = {}
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var source_output = get_source(0)
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if source_output != null:
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source = source_output.generator.get_shader_code("uv", source_output.output_index, context)
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assert (!(source is GDScriptFunctionState))
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while source is GDScriptFunctionState:
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source = yield(source, "completed")
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if source.empty():
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source = DEFAULT_GENERATED_SHADER
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var shader_code = mm_renderer.generate_shader(source)
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if shader_code.find("$") != -1:
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print("Incorrect shader generated for "+get_hier_name())
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#shader_code = mm_renderer.generate_shader({ rgba="vec4(0.0, 0.0, 0.0, 1.0)" })
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material.shader.code = shader_code
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update_again = true
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if source.has("textures"):
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for k in source.textures.keys():
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material.set_shader_param(k, source.textures[k])
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if source.has("pending_textures"):
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pending_textures = source.pending_textures
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else:
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pending_textures = []
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if pending_textures.empty():
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update_buffer()
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else:
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set_pending()
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func set_pending() -> void:
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if ! is_pending:
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mm_renderer.add_pending_request()
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is_pending = true
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func on_float_parameters_changed(parameter_changes : Dictionary) -> void:
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if mm_renderer.update_float_parameters(material, parameter_changes):
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update_again = true
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get_tree().call_group("preview", "on_texture_invalidated", "o%s_tex" % str(get_instance_id()))
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if pending_textures.empty():
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update_buffer()
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func on_texture_changed(n : String) -> void:
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pending_textures.erase(n)
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if pending_textures.empty() and mm_renderer.material_has_parameter(material, n):
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update_again = true
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update_buffer()
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func on_texture_invalidated(n : String) -> void:
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if mm_renderer.material_has_parameter(material, n):
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if pending_textures.empty():
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get_tree().call_group("preview", "on_texture_invalidated", "o%s_tex" % str(get_instance_id()))
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set_pending()
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if pending_textures.find(n) == -1:
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pending_textures.push_back(n)
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func update_buffer() -> void:
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if !updating:
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updating = true
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while update_again:
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if is_pending:
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mm_renderer.remove_pending_request()
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is_pending = false
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var renderer = mm_renderer.request(self)
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while renderer is GDScriptFunctionState:
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renderer = yield(renderer, "completed")
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if renderer == null:
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return
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current_renderer = renderer
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update_again = false
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var time = OS.get_ticks_msec()
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renderer = renderer.render_material(self, material, pow(2, get_parameter("size")))
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while renderer is GDScriptFunctionState:
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renderer = yield(renderer, "completed")
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if !update_again:
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renderer.copy_to_texture(texture)
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#texture.flags = Texture.FLAG_REPEAT
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emit_signal("rendering_time", OS.get_ticks_msec() - time)
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renderer.release(self)
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current_renderer = null
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updating = false
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get_tree().call_group("preview", "on_texture_changed", "o%s_tex" % str(get_instance_id()))
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func _get_shader_code(uv : String, output_index : int, context : MMGenContext) -> Dictionary:
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var shader_code = _get_shader_code_lod(uv, output_index, context, -1.0 if output_index == 0 else parameters.lod)
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if updating or update_again or !pending_textures.empty():
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shader_code.pending_textures = shader_code.textures.keys()
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return shader_code
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func _serialize(data: Dictionary) -> Dictionary:
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data.type = "buffer"
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return data
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