214 lines
7.1 KiB
GDScript
214 lines
7.1 KiB
GDScript
tool
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extends MMGenBase
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class_name MMGenShader
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var shader_model : Dictionary = {}
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func get_type():
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return "shader"
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func get_type_name():
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if shader_model.has("name"):
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return shader_model.name
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return .get_type_name()
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func get_parameter_defs():
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if shader_model == null or !shader_model.has("parameters"):
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return []
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else:
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return shader_model.parameters
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func get_input_defs():
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if shader_model == null or !shader_model.has("inputs"):
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return []
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else:
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return shader_model.inputs
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func get_output_defs():
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if shader_model == null or !shader_model.has("outputs"):
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return []
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else:
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return shader_model.outputs
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func set_shader_model(data: Dictionary):
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shader_model = data
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init_parameters()
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if shader_model.has("outputs"):
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for i in range(shader_model.outputs.size()):
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var output = shader_model.outputs[i]
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if output.has("rgba"):
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shader_model.outputs[i].type = "rgba"
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elif output.has("rgb"):
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shader_model.outputs[i].type = "rgb"
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else:
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shader_model.outputs[i].type = "f"
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func find_keyword_call(string, keyword):
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var search_string = "$%s(" % keyword
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var position = string.find(search_string)
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if position == -1:
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return null
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var parenthesis_level = 0
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var parameter_begin = position+search_string.length()
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var parameter_end = -1
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for i in range(parameter_begin, string.length()):
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if string[i] == '(':
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parenthesis_level += 1
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elif string[i] == ')':
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if parenthesis_level == 0:
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return string.substr(parameter_begin, i-parameter_begin)
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parenthesis_level -= 1
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return ""
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func replace_input(string, context, input, type, src, default):
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var required_defs = ""
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var required_code = ""
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var required_textures = {}
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var new_pass_required = false
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while true:
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var uv = find_keyword_call(string, input)
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if uv == null:
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break
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elif uv == "":
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print("syntax error")
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break
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elif uv.find("$") != -1:
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new_pass_required = true
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break
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var src_code
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if src == null:
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src_code = subst(default, context, "(%s)" % uv)
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else:
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src_code = src.generator.get_shader_code(uv, src.output_index, context)
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while src_code is GDScriptFunctionState:
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src_code = yield(src_code, "completed")
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src_code.string = src_code[type]
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required_defs += src_code.defs
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required_code += src_code.code
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required_textures = src_code.textures
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string = string.replace("$%s(%s)" % [ input, uv ], src_code.string)
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return { string=string, defs=required_defs, code=required_code, textures=required_textures, new_pass_required=new_pass_required }
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func is_word_letter(l):
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return "azertyuiopqsdfghjklmwxcvbnAZERTYUIOPQSDFGHJKLMWXCVBN1234567890_".find(l) != -1
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func replace_variable(string, variable, value):
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string = string.replace("$(%s)" % variable, value)
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var keyword_size = variable.length()+1
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var new_string = ""
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while !string.empty():
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var pos = string.find("$"+variable)
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if pos == -1:
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new_string += string
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break
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new_string += string.left(pos)
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string = string.right(pos)
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if string.empty() or !is_word_letter(string[0]):
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new_string += value
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else:
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new_string += "$"+variable
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string = string.right(keyword_size)
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return new_string
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func subst(string, context, uv = ""):
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var required_defs = ""
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var required_code = ""
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var required_textures = {}
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string = replace_variable(string, "name", name)
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string = replace_variable(string, "seed", str(get_seed()))
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if uv != "":
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string = replace_variable(string, "uv", "("+uv+")")
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if shader_model.has("parameters") and typeof(shader_model.parameters) == TYPE_ARRAY:
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for p in shader_model.parameters:
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if !p.has("name") or !p.has("type"):
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continue
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var value = parameters[p.name]
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var value_string = null
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if p.type == "float":
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value_string = "%.9f" % value
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elif p.type == "size":
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value_string = "%.9f" % pow(2, value+p.first)
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elif p.type == "enum":
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value_string = p.values[value].value
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elif p.type == "color":
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value_string = "vec4(%.9f, %.9f, %.9f, %.9f)" % [ value.r, value.g, value.b, value.a ]
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elif p.type == "gradient":
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value_string = name+"__"+p.name+"_gradient_fct"
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elif p.type == "boolean":
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value_string = "true" if value else "false"
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else:
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print("Cannot replace parameter of type "+p.type)
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if value_string != null:
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string = replace_variable(string, p.name, value_string)
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if shader_model.has("inputs") and typeof(shader_model.inputs) == TYPE_ARRAY:
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var cont = true
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while cont:
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var changed = false
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var new_pass_required = false
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for i in range(shader_model.inputs.size()):
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var input = shader_model.inputs[i]
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var source = get_source(i)
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var result = replace_input(string, context, input.name, input.type, source, input.default)
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while result is GDScriptFunctionState:
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result = yield(result, "completed")
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if string != result.string:
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changed = true
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if result.new_pass_required:
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new_pass_required = true
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string = result.string
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required_defs += result.defs
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required_code += result.code
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for t in result.textures.keys():
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required_textures[t] = result.textures[t]
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cont = changed and new_pass_required
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return { string=string, defs=required_defs, code=required_code, textures=required_textures }
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func _get_shader_code(uv : String, output_index : int, context : MMGenContext):
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var output_info = [ { field="rgba", type="vec4" }, { field="rgb", type="vec3" }, { field="f", type="float" } ]
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var rv = { defs="", code="", textures={} }
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var variant_string = uv+","+str(output_index)
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if shader_model != null and shader_model.has("outputs") and shader_model.outputs.size() > output_index:
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var output = shader_model.outputs[output_index]
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rv.defs = ""
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if shader_model.has("instance") && !context.has_variant(self):
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var subst_output = subst(shader_model.instance, context, uv)
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while subst_output is GDScriptFunctionState:
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subst_output = yield(subst_output, "completed")
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rv.defs += subst_output.string
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for t in subst_output.textures.keys():
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rv.textures[t] = subst_output.textures[t]
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for p in shader_model.parameters:
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if p.type == "gradient":
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var g = parameters[p.name]
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if !(g is MMGradient):
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g = MMGradient.new()
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g.deserialize(parameters[p.name])
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rv.defs += g.get_shader(name+"__"+p.name+"_gradient_fct")
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var variant_index = context.get_variant(self, variant_string)
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if variant_index == -1:
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variant_index = context.get_variant(self, variant_string)
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for t in output_info:
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if output.has(t.field):
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var subst_output = subst(output[t.field], context, uv)
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while subst_output is GDScriptFunctionState:
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subst_output = yield(subst_output, "completed")
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rv.defs += subst_output.defs
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rv.code += subst_output.code
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rv.code += "%s %s_%d_%d_%s = %s;\n" % [ t.type, name, output_index, variant_index, t.field, subst_output.string ]
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for t in subst_output.textures.keys():
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rv.textures[t] = subst_output.textures[t]
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for t in output_info:
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if output.has(t.field):
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rv[t.field] = "%s_%d_%d_%s" % [ name, output_index, variant_index, t.field ]
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return rv
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func get_globals():
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var list = .get_globals()
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if typeof(shader_model) == TYPE_DICTIONARY and shader_model.has("global") and list.find(shader_model.global) == -1:
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list.append(shader_model.global)
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return list
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func _serialize(data):
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data.shader_model = shader_model
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return data
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