1#ifndef _RSGUTILS_HPP
2#define _RSGUTILS_HPP
3/*-------------------------------------------------------------------------
4 * drawElements Quality Program Random Shader Generator
5 * ----------------------------------------------------
6 *
7 * Copyright 2014 The Android Open Source Project
8 *
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 *
21 *//*!
22 * \file
23 * \brief Utilities.
24 *//*--------------------------------------------------------------------*/
25
26#include "rsgDefs.hpp"
27#include "rsgShader.hpp"
28#include "rsgVariableValue.hpp"
29#include "deRandom.hpp"
30#include "rsgGeneratorState.hpp"
31#include "deMath.h"
32
33#include <vector>
34
35namespace rsg
36{
37
38void		computeUnifiedUniforms		(const Shader& vertexShader, const Shader& fragmentShader, std::vector<const ShaderInput*>& uniforms);
39void		computeUniformValues		(de::Random& rnd, std::vector<VariableValue>& values, const std::vector<const ShaderInput*>& uniforms);
40
41// \todo [2011-03-26 pyry] Move to ExpressionUtils!
42
43bool			isUndefinedValueRange			(ConstValueRangeAccess valueRange);
44
45int				getConservativeValueExprDepth	(const GeneratorState& state, ConstValueRangeAccess valueRange);
46int				getTypeConstructorDepth			(const VariableType& type);
47
48VariableType	computeRandomType				(GeneratorState& state, int maxScalars);
49void			computeRandomValueRange			(GeneratorState& state, ValueRangeAccess valueRange);
50
51float			computeDynamicRangeWeight		(ConstValueRangeAccess valueRange);
52
53inline float getQuantizedFloat (de::Random& rnd, float min, float max, float step)
54{
55	int numSteps = (int)((max-min)/step);
56	return min + step*rnd.getInt(0, numSteps);
57}
58
59inline bool quantizeFloatRange (float& min, float& max)
60{
61	const float	subdiv = 8;
62
63	float newMin = deFloatCeil(min*subdiv)/subdiv;
64	if (newMin <= max)
65		min = newMin; // Minimum value quantized
66	else
67		return false;
68
69	float newMax = deFloatFloor(max*subdiv)/subdiv;
70	if (min <= newMax)
71		max = newMax;
72	else
73		return false;
74
75	return true;
76}
77
78} // rsg
79
80#endif // _RSGUTILS_HPP
81