godot/scene/resources/material.cpp

/*************************************************************************/
/*  material.cpp                                                         */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "material.h"
#include "scene/scene_string_names.h"

static const char *_flag_names[Material::FLAG_MAX] = {
	"visible",
	"double_sided",
	"invert_faces",
	"unshaded",
	"on_top",
	"lightmap_on_uv2",
	"colarray_is_srgb"
};

static const Material::Flag _flag_indices[Material::FLAG_MAX] = {
	Material::FLAG_VISIBLE,
	Material::FLAG_DOUBLE_SIDED,
	Material::FLAG_INVERT_FACES,
	Material::FLAG_UNSHADED,
	Material::FLAG_ONTOP,
	Material::FLAG_LIGHTMAP_ON_UV2,
	Material::FLAG_COLOR_ARRAY_SRGB,
};

RID Material::get_rid() const {

	return material;
}

void Material::set_flag(Flag p_flag, bool p_enabled) {

	ERR_FAIL_INDEX(p_flag, FLAG_MAX);
	flags[p_flag] = p_enabled;
	VisualServer::get_singleton()->material_set_flag(material, (VS::MaterialFlag)p_flag, p_enabled);
	_change_notify();
}

void Material::set_blend_mode(BlendMode p_blend_mode) {

	ERR_FAIL_INDEX(p_blend_mode, 4);
	blend_mode = p_blend_mode;
	VisualServer::get_singleton()->material_set_blend_mode(material, (VS::MaterialBlendMode)p_blend_mode);
	_change_notify();
}

Material::BlendMode Material::get_blend_mode() const {

	return blend_mode;
}

void Material::set_depth_draw_mode(DepthDrawMode p_depth_draw_mode) {

	depth_draw_mode = p_depth_draw_mode;
	VisualServer::get_singleton()->material_set_depth_draw_mode(material, (VS::MaterialDepthDrawMode)p_depth_draw_mode);
}

Material::DepthDrawMode Material::get_depth_draw_mode() const {

	return depth_draw_mode;
}

bool Material::get_flag(Flag p_flag) const {

	ERR_FAIL_INDEX_V(p_flag, FLAG_MAX, false);
	return flags[p_flag];
}

void Material::set_line_width(float p_width) {

	line_width = p_width;
	VisualServer::get_singleton()->material_set_line_width(material, p_width);
	_change_notify("line_width");
}

float Material::get_line_width() const {

	return line_width;
}

void Material::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_flag", "flag", "enable"), &Material::set_flag);
	ObjectTypeDB::bind_method(_MD("get_flag", "flag"), &Material::get_flag);
	ObjectTypeDB::bind_method(_MD("set_blend_mode", "mode"), &Material::set_blend_mode);
	ObjectTypeDB::bind_method(_MD("get_blend_mode"), &Material::get_blend_mode);
	ObjectTypeDB::bind_method(_MD("set_line_width", "width"), &Material::set_line_width);
	ObjectTypeDB::bind_method(_MD("get_line_width"), &Material::get_line_width);
	ObjectTypeDB::bind_method(_MD("set_depth_draw_mode", "mode"), &Material::set_depth_draw_mode);
	ObjectTypeDB::bind_method(_MD("get_depth_draw_mode"), &Material::get_depth_draw_mode);

	for (int i = 0; i < FLAG_MAX; i++)
		ADD_PROPERTYI(PropertyInfo(Variant::BOOL, String() + "flags/" + _flag_names[i]), _SCS("set_flag"), _SCS("get_flag"), _flag_indices[i]);

	ADD_PROPERTY(PropertyInfo(Variant::INT, "params/blend_mode", PROPERTY_HINT_ENUM, "Mix,Add,Sub,PMAlpha"), _SCS("set_blend_mode"), _SCS("get_blend_mode"));
	ADD_PROPERTY(PropertyInfo(Variant::INT, "params/depth_draw", PROPERTY_HINT_ENUM, "Always,Opaque Only,Pre-Pass Alpha,Never"), _SCS("set_depth_draw_mode"), _SCS("get_depth_draw_mode"));
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "params/line_width", PROPERTY_HINT_RANGE, "0.1,32.0,0.1"), _SCS("set_line_width"), _SCS("get_line_width"));

	BIND_CONSTANT(FLAG_VISIBLE);
	BIND_CONSTANT(FLAG_DOUBLE_SIDED);
	BIND_CONSTANT(FLAG_INVERT_FACES);
	BIND_CONSTANT(FLAG_UNSHADED);
	BIND_CONSTANT(FLAG_ONTOP);
	BIND_CONSTANT(FLAG_LIGHTMAP_ON_UV2);
	BIND_CONSTANT(FLAG_COLOR_ARRAY_SRGB);
	BIND_CONSTANT(FLAG_MAX);

	BIND_CONSTANT(DEPTH_DRAW_ALWAYS);
	BIND_CONSTANT(DEPTH_DRAW_OPAQUE_ONLY);
	BIND_CONSTANT(DEPTH_DRAW_OPAQUE_PRE_PASS_ALPHA);
	BIND_CONSTANT(DEPTH_DRAW_NEVER);

	BIND_CONSTANT(BLEND_MODE_MIX);
	BIND_CONSTANT(BLEND_MODE_ADD);
	BIND_CONSTANT(BLEND_MODE_SUB);
	BIND_CONSTANT(BLEND_MODE_MUL);
	BIND_CONSTANT(BLEND_MODE_PREMULT_ALPHA);
}

Material::Material(const RID &p_material) {

	material = p_material;

	flags[FLAG_VISIBLE] = true;
	flags[FLAG_DOUBLE_SIDED] = false;
	flags[FLAG_INVERT_FACES] = false;
	flags[FLAG_UNSHADED] = false;
	flags[FLAG_ONTOP] = false;
	flags[FLAG_LIGHTMAP_ON_UV2] = true;
	flags[FLAG_COLOR_ARRAY_SRGB] = false;

	depth_draw_mode = DEPTH_DRAW_OPAQUE_ONLY;

	blend_mode = BLEND_MODE_MIX;
}

Material::~Material() {

	VisualServer::get_singleton()->free(material);
}

static const char *_param_names[FixedMaterial::PARAM_MAX] = {
	"diffuse",
	"detail",
	"specular",
	"emission",
	"specular_exp",
	"glow",
	"normal",
	"shade_param"
};

static const char *_full_param_names[FixedMaterial::PARAM_MAX] = {
	"params/diffuse",
	"params/detail",
	"params/specular",
	"params/emission",
	"params/specular_exp",
	"params/glow",
	"params/normal",
	"params/shade_param"
};

/*
static const char*_texture_param_names[FixedMaterial::PARAM_MAX]={
	"tex_diffuse",
	"tex_detail",
	"tex_specular",
	"tex_emission",
	"tex_specular_exp",
	"tex_glow",
	"tex_detail_mix",
	"tex_normal",
	"tex_shade_param"
};
*/
static const FixedMaterial::Parameter _param_indices[FixedMaterial::PARAM_MAX] = {
	FixedMaterial::PARAM_DIFFUSE,
	FixedMaterial::PARAM_DETAIL,
	FixedMaterial::PARAM_SPECULAR,
	FixedMaterial::PARAM_EMISSION,
	FixedMaterial::PARAM_SPECULAR_EXP,
	FixedMaterial::PARAM_GLOW,
	FixedMaterial::PARAM_NORMAL,
	FixedMaterial::PARAM_SHADE_PARAM,
};

void FixedMaterial::set_parameter(Parameter p_parameter, const Variant &p_value) {

	ERR_FAIL_INDEX(p_parameter, PARAM_MAX);
	if ((p_parameter == PARAM_DIFFUSE || p_parameter == PARAM_SPECULAR || p_parameter == PARAM_EMISSION)) {

		if (p_value.get_type() != Variant::COLOR) {
			ERR_EXPLAIN(String(_param_names[p_parameter]) + " expects Color");
			ERR_FAIL();
		}
	} else {

		if (!p_value.is_num()) {
			ERR_EXPLAIN(String(_param_names[p_parameter]) + " expects scalar");
			ERR_FAIL();
		}
	}

	ERR_FAIL_COND((p_parameter == PARAM_DIFFUSE || p_parameter == PARAM_SPECULAR || p_parameter == PARAM_EMISSION) && p_value.get_type() != Variant::COLOR);
	ERR_FAIL_COND(p_parameter != PARAM_SHADE_PARAM && p_parameter != PARAM_DIFFUSE && p_parameter != PARAM_DETAIL && p_parameter != PARAM_SPECULAR && p_parameter != PARAM_EMISSION && p_value.get_type() != Variant::REAL && p_value.get_type() != Variant::INT);

	param[p_parameter] = p_value;

	VisualServer::get_singleton()->fixed_material_set_param(material, (VS::FixedMaterialParam)p_parameter, p_value);

	_change_notify(_full_param_names[p_parameter]);
}

Variant FixedMaterial::get_parameter(Parameter p_parameter) const {
	ERR_FAIL_INDEX_V(p_parameter, PARAM_MAX, Variant());
	return param[p_parameter];
}

void FixedMaterial::set_texture(Parameter p_parameter, Ref<Texture> p_texture) {

	ERR_FAIL_INDEX(p_parameter, PARAM_MAX);

	texture_param[p_parameter] = p_texture;
	VisualServer::get_singleton()->fixed_material_set_texture(material, (VS::FixedMaterialParam)p_parameter, p_texture.is_null() ? RID() : p_texture->get_rid());

	_change_notify();
}
Ref<Texture> FixedMaterial::get_texture(Parameter p_parameter) const {

	ERR_FAIL_INDEX_V(p_parameter, PARAM_MAX, Ref<Texture>());
	return texture_param[p_parameter];
}

void FixedMaterial::set_texcoord_mode(Parameter p_parameter, TexCoordMode p_mode) {

	ERR_FAIL_INDEX(p_parameter, PARAM_MAX);
	ERR_FAIL_INDEX(p_mode, 4);

	if (p_mode == texture_texcoord[p_parameter])
		return;

	texture_texcoord[p_parameter] = p_mode;

	VisualServer::get_singleton()->fixed_material_set_texcoord_mode(material, (VS::FixedMaterialParam)p_parameter, (VS::FixedMaterialTexCoordMode)p_mode);

	_change_notify();
}

FixedMaterial::TexCoordMode FixedMaterial::get_texcoord_mode(Parameter p_parameter) const {

	ERR_FAIL_INDEX_V(p_parameter, PARAM_MAX, TEXCOORD_UV);
	return texture_texcoord[p_parameter];
}

void FixedMaterial::set_light_shader(LightShader p_shader) {

	light_shader = p_shader;
	VS::get_singleton()->fixed_material_set_light_shader(material, VS::FixedMaterialLightShader(p_shader));
}

FixedMaterial::LightShader FixedMaterial::get_light_shader() const {

	return light_shader;
}

void FixedMaterial::set_uv_transform(const Transform &p_transform) {

	uv_transform = p_transform;
	VisualServer::get_singleton()->fixed_material_set_uv_transform(material, p_transform);
	_change_notify();
}

Transform FixedMaterial::get_uv_transform() const {

	return uv_transform;
}

void FixedMaterial::set_fixed_flag(FixedFlag p_flag, bool p_value) {
	ERR_FAIL_INDEX(p_flag, 5);
	fixed_flags[p_flag] = p_value;
	VisualServer::get_singleton()->fixed_material_set_flag(material, (VS::FixedMaterialFlags)p_flag, p_value);
}

bool FixedMaterial::get_fixed_flag(FixedFlag p_flag) const {
	ERR_FAIL_INDEX_V(p_flag, 5, false);
	return fixed_flags[p_flag];
}

void FixedMaterial::set_point_size(float p_size) {

	ERR_FAIL_COND(p_size < 0);
	point_size = p_size;
	VisualServer::get_singleton()->fixed_material_set_point_size(material, p_size);
}

float FixedMaterial::get_point_size() const {

	return point_size;
}

void FixedMaterial::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_parameter", "param", "value"), &FixedMaterial::set_parameter);
	ObjectTypeDB::bind_method(_MD("get_parameter", "param"), &FixedMaterial::get_parameter);

	ObjectTypeDB::bind_method(_MD("set_texture", "param", "texture:Texture"), &FixedMaterial::set_texture);
	ObjectTypeDB::bind_method(_MD("get_texture:Texture", "param"), &FixedMaterial::get_texture);

	ObjectTypeDB::bind_method(_MD("set_texcoord_mode", "param", "mode"), &FixedMaterial::set_texcoord_mode);
	ObjectTypeDB::bind_method(_MD("get_texcoord_mode", "param"), &FixedMaterial::get_texcoord_mode);

	ObjectTypeDB::bind_method(_MD("set_fixed_flag", "flag", "value"), &FixedMaterial::set_fixed_flag);
	ObjectTypeDB::bind_method(_MD("get_fixed_flag", "flag"), &FixedMaterial::get_fixed_flag);

	ObjectTypeDB::bind_method(_MD("set_uv_transform", "transform"), &FixedMaterial::set_uv_transform);
	ObjectTypeDB::bind_method(_MD("get_uv_transform"), &FixedMaterial::get_uv_transform);

	ObjectTypeDB::bind_method(_MD("set_light_shader", "shader"), &FixedMaterial::set_light_shader);
	ObjectTypeDB::bind_method(_MD("get_light_shader"), &FixedMaterial::get_light_shader);

	ObjectTypeDB::bind_method(_MD("set_point_size", "size"), &FixedMaterial::set_point_size);
	ObjectTypeDB::bind_method(_MD("get_point_size"), &FixedMaterial::get_point_size);

	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "fixed_flags/use_alpha"), _SCS("set_fixed_flag"), _SCS("get_fixed_flag"), FLAG_USE_ALPHA);
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "fixed_flags/use_color_array"), _SCS("set_fixed_flag"), _SCS("get_fixed_flag"), FLAG_USE_COLOR_ARRAY);
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "fixed_flags/use_point_size"), _SCS("set_fixed_flag"), _SCS("get_fixed_flag"), FLAG_USE_POINT_SIZE);
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "fixed_flags/discard_alpha"), _SCS("set_fixed_flag"), _SCS("get_fixed_flag"), FLAG_DISCARD_ALPHA);
	ADD_PROPERTYI(PropertyInfo(Variant::BOOL, "fixed_flags/use_xy_normalmap"), _SCS("set_fixed_flag"), _SCS("get_fixed_flag"), FLAG_USE_XY_NORMALMAP);
	ADD_PROPERTYI(PropertyInfo(Variant::COLOR, "params/diffuse"), _SCS("set_parameter"), _SCS("get_parameter"), PARAM_DIFFUSE);
	ADD_PROPERTYI(PropertyInfo(Variant::COLOR, "params/specular", PROPERTY_HINT_COLOR_NO_ALPHA), _SCS("set_parameter"), _SCS("get_parameter"), PARAM_SPECULAR);
	ADD_PROPERTYI(PropertyInfo(Variant::COLOR, "params/emission", PROPERTY_HINT_COLOR_NO_ALPHA), _SCS("set_parameter"), _SCS("get_parameter"), PARAM_EMISSION);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "params/specular_exp", PROPERTY_HINT_RANGE, "1,64,0.01"), _SCS("set_parameter"), _SCS("get_parameter"), PARAM_SPECULAR_EXP);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "params/detail_mix", PROPERTY_HINT_RANGE, "0,1,0.01"), _SCS("set_parameter"), _SCS("get_parameter"), PARAM_DETAIL);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "params/normal_depth", PROPERTY_HINT_RANGE, "-4,4,0.01"), _SCS("set_parameter"), _SCS("get_parameter"), PARAM_NORMAL);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "params/shader", PROPERTY_HINT_ENUM, "Lambert,Wrap,Velvet,Toon"), _SCS("set_light_shader"), _SCS("get_light_shader"));
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "params/shader_param", PROPERTY_HINT_RANGE, "0,1,0.01"), _SCS("set_parameter"), _SCS("get_parameter"), PARAM_SHADE_PARAM);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "params/glow", PROPERTY_HINT_RANGE, "0,8,0.01"), _SCS("set_parameter"), _SCS("get_parameter"), PARAM_GLOW);
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "params/point_size", PROPERTY_HINT_RANGE, "0,1024,1"), _SCS("set_point_size"), _SCS("get_point_size"));
	ADD_PROPERTY(PropertyInfo(Variant::TRANSFORM, "uv_xform"), _SCS("set_uv_transform"), _SCS("get_uv_transform"));

	for (int i = 0; i < PARAM_MAX; i++) {
		ADD_PROPERTYI(PropertyInfo(Variant::OBJECT, String() + "textures/" + _param_names[i], PROPERTY_HINT_RESOURCE_TYPE, "Texture"), _SCS("set_texture"), _SCS("get_texture"), _param_indices[i]);
		ADD_PROPERTYI(PropertyInfo(Variant::INT, String() + "textures/" + _param_names[i] + "_tc", PROPERTY_HINT_ENUM, "UV,UV Xform,UV2,Sphere"), _SCS("set_texcoord_mode"), _SCS("get_texcoord_mode"), _param_indices[i]);
	}

	BIND_CONSTANT(PARAM_DIFFUSE);
	BIND_CONSTANT(PARAM_DETAIL);
	BIND_CONSTANT(PARAM_SPECULAR);
	BIND_CONSTANT(PARAM_EMISSION);
	BIND_CONSTANT(PARAM_SPECULAR_EXP);
	BIND_CONSTANT(PARAM_GLOW);
	BIND_CONSTANT(PARAM_NORMAL);
	BIND_CONSTANT(PARAM_SHADE_PARAM);
	BIND_CONSTANT(PARAM_MAX);

	BIND_CONSTANT(TEXCOORD_UV);
	BIND_CONSTANT(TEXCOORD_UV_TRANSFORM);
	BIND_CONSTANT(TEXCOORD_UV2);
	BIND_CONSTANT(TEXCOORD_SPHERE);

	BIND_CONSTANT(FLAG_USE_ALPHA);
	BIND_CONSTANT(FLAG_USE_COLOR_ARRAY);
	BIND_CONSTANT(FLAG_USE_POINT_SIZE);
	BIND_CONSTANT(FLAG_DISCARD_ALPHA);

	BIND_CONSTANT(LIGHT_SHADER_LAMBERT);
	BIND_CONSTANT(LIGHT_SHADER_WRAP);
	BIND_CONSTANT(LIGHT_SHADER_VELVET);
	BIND_CONSTANT(LIGHT_SHADER_TOON);
}

FixedMaterial::FixedMaterial() :
		Material(VS::get_singleton()->fixed_material_create()) {

	param[PARAM_DIFFUSE] = Color(1, 1, 1);
	param[PARAM_SPECULAR] = Color(0.0, 0.0, 0.0);
	param[PARAM_EMISSION] = Color(0.0, 0.0, 0.0);
	param[PARAM_SPECULAR_EXP] = 40;
	param[PARAM_GLOW] = 0;
	param[PARAM_NORMAL] = 1;
	param[PARAM_SHADE_PARAM] = 0.5;
	param[PARAM_DETAIL] = 1.0;

	set_flag(FLAG_COLOR_ARRAY_SRGB, true);

	fixed_flags[FLAG_USE_ALPHA] = false;
	fixed_flags[FLAG_USE_COLOR_ARRAY] = false;
	fixed_flags[FLAG_USE_POINT_SIZE] = false;
	fixed_flags[FLAG_USE_XY_NORMALMAP] = false;
	fixed_flags[FLAG_DISCARD_ALPHA] = false;

	for (int i = 0; i < PARAM_MAX; i++) {

		texture_texcoord[i] = TEXCOORD_UV;
	}

	light_shader = LIGHT_SHADER_LAMBERT;

	point_size = 1.0;
}

FixedMaterial::~FixedMaterial() {
}

bool ShaderMaterial::_set(const StringName &p_name, const Variant &p_value) {

	if (p_name == SceneStringNames::get_singleton()->shader_shader) {
		set_shader(p_value);
		return true;
	} else {

		if (shader.is_valid()) {

			StringName pr = shader->remap_param(p_name);
			if (!pr) {
				String n = p_name;
				if (n.find("param/") == 0) { //backwards compatibility
					pr = n.substr(6, n.length());
				}
			}
			if (pr) {
				VisualServer::get_singleton()->material_set_param(material, pr, p_value);
				return true;
			}
		}
	}

	return false;
}

bool ShaderMaterial::_get(const StringName &p_name, Variant &r_ret) const {

	if (p_name == SceneStringNames::get_singleton()->shader_shader) {

		r_ret = get_shader();
		return true;
	} else {

		if (shader.is_valid()) {

			StringName pr = shader->remap_param(p_name);
			if (pr) {
				r_ret = VisualServer::get_singleton()->material_get_param(material, pr);
				return true;
			}
		}
	}

	return false;
}

void ShaderMaterial::_get_property_list(List<PropertyInfo> *p_list) const {

	p_list->push_back(PropertyInfo(Variant::OBJECT, "shader/shader", PROPERTY_HINT_RESOURCE_TYPE, "MaterialShader,MaterialShaderGraph"));

	if (!shader.is_null()) {

		shader->get_param_list(p_list);
	}
}

void ShaderMaterial::_shader_changed() {

	_change_notify(); //also all may have changed then
}

void ShaderMaterial::set_shader(const Ref<Shader> &p_shader) {

	ERR_FAIL_COND(p_shader.is_valid() && p_shader->get_mode() != Shader::MODE_MATERIAL);

	if (shader.is_valid())
		shader->disconnect(SceneStringNames::get_singleton()->changed, this, SceneStringNames::get_singleton()->_shader_changed);
	shader = p_shader;
	VS::get_singleton()->material_set_shader(material, shader.is_valid() ? shader->get_rid() : RID());
	if (shader.is_valid()) {
		shader->connect(SceneStringNames::get_singleton()->changed, this, SceneStringNames::get_singleton()->_shader_changed);
	}
	_change_notify();
}

Ref<Shader> ShaderMaterial::get_shader() const {

	return shader;
}

void ShaderMaterial::set_shader_param(const StringName &p_param, const Variant &p_value) {

	VisualServer::get_singleton()->material_set_param(material, p_param, p_value);
}

Variant ShaderMaterial::get_shader_param(const StringName &p_param) const {

	return VisualServer::get_singleton()->material_get_param(material, p_param);
}

void ShaderMaterial::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_shader", "shader:Shader"), &ShaderMaterial::set_shader);
	ObjectTypeDB::bind_method(_MD("get_shader:Shader"), &ShaderMaterial::get_shader);

	ObjectTypeDB::bind_method(_MD("set_shader_param", "param", "value:Variant"), &ShaderMaterial::set_shader_param);
	ObjectTypeDB::bind_method(_MD("get_shader_param:Variant", "param"), &ShaderMaterial::get_shader_param);

	ObjectTypeDB::bind_method(_MD("_shader_changed"), &ShaderMaterial::_shader_changed);
}

void ShaderMaterial::get_argument_options(const StringName &p_function, int p_idx, List<String> *r_options) const {

	String f = p_function.operator String();
	if ((f == "get_shader_param" || f == "set_shader_param") && p_idx == 0) {

		if (shader.is_valid()) {
			List<PropertyInfo> pl;
			shader->get_param_list(&pl);
			for (List<PropertyInfo>::Element *E = pl.front(); E; E = E->next()) {
				r_options->push_back("\"" + E->get().name.replace_first("shader_param/", "") + "\"");
			}
		}
	}
	Material::get_argument_options(p_function, p_idx, r_options);
}

ShaderMaterial::ShaderMaterial() :
		Material(VisualServer::get_singleton()->material_create()) {
}

/////////////////////////////////