libs/hwui/Matrix.h

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_UI_MATRIX_H
#define ANDROID_UI_MATRIX_H

#include <SkMatrix.h>

#include "Rect.h"

namespace android {
namespace uirenderer {

///////////////////////////////////////////////////////////////////////////////
// Classes
///////////////////////////////////////////////////////////////////////////////

class Matrix4 {
public:
	Matrix4() {
		loadIdentity();
	}

	Matrix4(const float* v) {
		load(v);
	}

	Matrix4(const Matrix4& v) {
		load(v);
	}

	Matrix4(const SkMatrix& v) {
		load(v);
	}

	void loadIdentity();

	void load(const float* v);
	void load(const Matrix4& v);
	void load(const SkMatrix& v);

	void loadTranslate(float x, float y, float z);
	void loadScale(float sx, float sy, float sz);
	void loadRotate(float angle, float x, float y, float z);
	void loadMultiply(const Matrix4& u, const Matrix4& v);

	void loadOrtho(float left, float right, float bottom, float top, float near, float far);

	void multiply(const Matrix4& v) {
		Matrix4 u;
		u.loadMultiply(*this, v);
		load(u);
	}

	void translate(float x, float y, float z) {
		Matrix4 u;
		u.loadTranslate(x, y, z);
		multiply(u);
	}

	void scale(float sx, float sy, float sz) {
		Matrix4 u;
		u.loadScale(sx, sy, sz);
		multiply(u);
	}

	void rotate(float angle, float x, float y, float z) {
		Matrix4 u;
		u.loadRotate(angle, x, y, z);
		multiply(u);
	}

	void copyTo(float* v) const;
	void copyTo(SkMatrix& v) const;

	void mapRect(Rect& r) const;

	void dump() const;

private:
    inline float get(int i, int j) const {
        return mMat[i * 4 + j];
    }

    inline void set(int i, int j, float v) {
    	mMat[i * 4 + j] = v;
    }

	float mMat[16];
}; // class Matrix4

///////////////////////////////////////////////////////////////////////////////
// Types
///////////////////////////////////////////////////////////////////////////////

typedef Matrix4 mat4;

}; // namespace uirenderer
}; // namespace android

#endif // ANDROID_UI_MATRIX_H