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/*
* Copyright © 2010-2011 Linaro Limited
*
* This file is part of the glmark2 OpenGL (ES) 2.0 benchmark.
*
* glmark2 is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* glmark2 is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* glmark2. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Alexandros Frantzis (glmark2)
*/
#include <string>
#include <sstream>
#include <vector>
#include "vec.h"
#include "mat.h"
/**
* Helper class for loading and manipulating shader sources.
*/
class ShaderSource
{
public:
enum ShaderType {
ShaderTypeVertex,
ShaderTypeFragment,
ShaderTypeUnknown
};
ShaderSource(ShaderType type = ShaderTypeUnknown) :
precision_has_been_set_(false), type_(type) {}
ShaderSource(const std::string &filename, ShaderType type = ShaderTypeUnknown) :
precision_has_been_set_(false), type_(type) { append_file(filename); }
void append(const std::string &str);
void append_file(const std::string &filename);
void replace(const std::string &remove, const std::string &insert);
void replace_with_file(const std::string &remove, const std::string &filename);
void add(const std::string &str, const std::string &function = "");
void add_const(const std::string &name, float f,
const std::string &function = "");
void add_const(const std::string &name, std::vector<float> &f,
const std::string &function = "");
void add_const(const std::string &name, const LibMatrix::vec2 &v,
const std::string &function = "");
void add_const(const std::string &name, const LibMatrix::vec3 &v,
const std::string &function = "");
void add_const(const std::string &name, const LibMatrix::vec4 &v,
const std::string &function = "");
void add_const(const std::string &name, const LibMatrix::mat3 &m,
const std::string &function = "");
void add_array(const std::string &name, std::vector<float> &array,
const std::string &init_function,
const std::string &decl_function = "");
ShaderType type();
std::string str();
enum PrecisionValue {
PrecisionValueLow,
PrecisionValueMedium,
PrecisionValueHigh,
PrecisionValueDefault,
};
struct Precision {
Precision();
Precision(PrecisionValue int_p, PrecisionValue float_p,
PrecisionValue sampler2d_p, PrecisionValue samplercube_p);
Precision(const std::string& list);
PrecisionValue int_precision;
PrecisionValue float_precision;
PrecisionValue sampler2d_precision;
PrecisionValue samplercube_precision;
};
void precision(const Precision& precision);
const Precision& precision();
static void default_precision(const Precision& precision,
ShaderType type = ShaderTypeUnknown);
static const Precision& default_precision(ShaderType type);
private:
void add_global(const std::string &str);
void add_local(const std::string &str, const std::string &function);
bool load_file(const std::string& filename, std::string& str);
void emit_precision(std::stringstream& ss, ShaderSource::PrecisionValue val,
const std::string& type_str);
std::stringstream source_;
Precision precision_;
bool precision_has_been_set_;
ShaderType type_;
static std::vector<Precision> default_precision_;
};
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