1// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//    http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#ifndef sw_MatrixStack_hpp
16#define sw_MatrixStack_hpp
17
18#include "Renderer/Matrix.hpp"
19
20namespace sw
21{
22	class MatrixStack
23	{
24	public:
25		MatrixStack(int size = 2);
26
27		~MatrixStack();
28
29		void identity();
30		void load(const Matrix &M);
31		void load(const float *M);
32		void load(const double *M);
33
34		void translate(float x, float y, float z);
35		void translate(double x, double y, double z);
36		void rotate(float angle, float x, float y, float z);
37		void rotate(double angle, double x, double y, double z);
38		void scale(float x, float y, float z);
39		void scale(double x, double y, double z);
40		void multiply(const float *M);
41		void multiply(const double *M);
42
43		void frustum(float left, float right, float bottom, float top, float zNear, float zFar);
44		void ortho(double left, double right, double bottom, double top, double zNear, double zFar);
45
46		bool push();   // False on overflow
47		bool pop();    // False on underflow
48
49		const Matrix &current();
50		bool isIdentity() const;
51
52	private:
53		int top;
54		int size;
55		Matrix *stack;
56	};
57}
58
59#endif   // sw_MatrixStack_hpp
60