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/******************************************************************************
*
* MantaFlow fluid solver framework
* Copyright 2014 Tobias Pfaff, Nils Thuerey
*
* This program is free software, distributed under the terms of the
* Apache License, Version 2.0
* http://www.apache.org/licenses/LICENSE-2.0
*
* Simple image IO
*
******************************************************************************/
#ifndef MANTA_SIMPLEIMAGE_H
#define MANTA_SIMPLEIMAGE_H
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "manta.h"
#include "vectorbase.h"
namespace Manta {
//*****************************************************************************
// simple 2d image class
// template<class Scalar>
class SimpleImage {
public:
// cons/des
SimpleImage() : mSize(-1), mpData(nullptr), mAbortOnError(true){};
virtual ~SimpleImage()
{
if (mpData)
delete[] mpData;
};
//! set to constant
void reset(Real val = 0.)
{
const Vec3 v = Vec3(val);
for (int i = 0; i < mSize[0] * mSize[1]; i++)
mpData[i] = v;
}
//! init memory & reset to zero
void init(int x, int y)
{
mSize = Vec3i(x, y, 0);
mpData = new Vec3[x * y];
reset();
};
inline bool checkIndex(int x, int y)
{
if ((x < 0) || (y < 0) || (x > mSize[0] - 1) || (y > mSize[1] - 1)) {
errMsg("SimpleImage::operator() Invalid access to " << x << "," << y << ", size=" << mSize);
return false;
}
return true;
}
// access element
inline Vec3 &operator()(int x, int y)
{
DEBUG_ONLY(checkIndex(x, y));
return mpData[y * mSize[0] + x];
};
inline Vec3 &get(int x, int y)
{
return (*this)(x, y);
}
inline Vec3 &getMap(int x, int y, int z, int axis)
{
int i = x, j = y;
if (axis == 1)
j = z;
if (axis == 0) {
i = y;
j = z;
}
return get(i, j);
}
// output as string, debug
std::string toString()
{
std::ostringstream out;
for (int j = 0; j < mSize[1]; j++) {
for (int i = 0; i < mSize[0]; i++) {
// normal zyx order */
out << (*this)(i, j);
out << " ";
}
// if (format)
out << std::endl;
}
return out.str();
}
// multiply all values by f
void add(Vec3 f)
{
for (int j = 0; j < mSize[1]; j++)
for (int i = 0; i < mSize[0]; i++) {
get(i, j) += f;
}
}
// multiply all values by f
void multiply(Real f)
{
for (int j = 0; j < mSize[1]; j++)
for (int i = 0; i < mSize[0]; i++) {
get(i, j) *= f;
}
}
// map 0-f to 0-1 range, clamp
void mapRange(Real f)
{
for (int j = 0; j < mSize[1]; j++)
for (int i = 0; i < mSize[0]; i++) {
get(i, j) /= f;
for (int c = 0; c < 3; ++c)
get(i, j)[c] = clamp(get(i, j)[c], (Real)0., (Real)1.);
}
}
// normalize max values
void normalizeMax()
{
Real max = normSquare(get(0, 0));
for (int j = 0; j < mSize[1]; j++)
for (int i = 0; i < mSize[0]; i++) {
if (normSquare(get(i, j)) > max)
max = normSquare(get(i, j));
}
max = sqrt(max);
Real invMax = 1. / max;
for (int j = 0; j < mSize[1]; j++)
for (int i = 0; i < mSize[0]; i++) {
get(i, j) *= invMax;
}
};
// normalize min and max values
void normalizeMinMax()
{
Real max = normSquare(get(0, 0));
Real min = max;
for (int j = 0; j < mSize[1]; j++)
for (int i = 0; i < mSize[0]; i++) {
if (normSquare(get(i, j)) > max)
max = normSquare(get(i, j));
if (normSquare(get(i, j)) < min)
min = normSquare(get(i, j));
}
max = sqrt(max);
min = sqrt(min);
Real factor = 1. / (max - min);
for (int j = 0; j < mSize[1]; j++)
for (int i = 0; i < mSize[0]; i++) {
get(i, j) -= min;
get(i, j) *= factor;
}
};
void setAbortOnError(bool set)
{
mAbortOnError = set;
}
// ppm in/output
// write whole image
bool writePpm(std::string filename);
// write rectangle to ppm
bool writePpm(
std::string filename, int minx, int miny, int maxx, int maxy, bool invertXY = false);
// read in a ppm file, and init the image accordingly
bool initFromPpm(std::string filename);
// check index is valid
bool indexIsValid(int i, int j);
//! access
inline Vec3i getSize() const
{
return mSize;
}
protected:
//! size
Vec3i mSize;
//! data
Vec3 *mpData;
// make errors fatal, or continue?
bool mAbortOnError;
}; // SimpleImage
}; // namespace Manta
#endif
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