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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* TODO: insert short description here
*//*
* Authors: see git history
*
* Copyright (C) 2018 Authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef INKSCAPE_TRACE_IMAGEMAP_H
#define INKSCAPE_TRACE_IMAGEMAP_H
#include <vector>
#include <array>
namespace Inkscape {
namespace Trace {
template <typename T>
struct MapBase
{
int width;
int height;
std::vector<T> pixels;
MapBase(int width, int height)
: width(width)
, height(height)
, pixels(width * height) {}
int offset(int x, int y) const { return x + y * width; }
T *row(int y) { return pixels.data() + y * width; }
T const *row(int y) const { return pixels.data() + y * width; }
void setPixel(int x, int y, T val) { pixels[offset(x, y)] = val; }
T getPixel(int x, int y) const { return pixels[offset(x, y)]; }
};
/*
* GrayMap
*/
struct GrayMap
: MapBase<unsigned long>
{
static unsigned long constexpr BLACK = 0;
static unsigned long constexpr WHITE = 255 * 3;
GrayMap(int width, int height);
bool writePPM(char const *fileName);
};
/*
* RgbMap
*/
struct RGB
{
unsigned char r;
unsigned char g;
unsigned char b;
};
struct RgbMap
: MapBase<RGB>
{
RgbMap(int width, int height);
bool writePPM(char const *fileName);
};
/*
* IndexedMap
*/
struct IndexedMap
: MapBase<unsigned>
{
IndexedMap(int width, int height);
RGB getPixelValue(int x, int y) const { return clut[getPixel(x, y) % clut.size()]; }
bool writePPM(char const *fileName);
int nrColors;
std::array<RGB, 256> clut; ///< Color look-up table.
};
} // namespace Trace
} // namespace Inkscape
#endif // INKSCAPE_TRACE_IMAGEMAP_H
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