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#pragma once
#include <stdint.h>
#include <cstdio>
namespace daguerre {
typedef uint32_t hilbert_color;
struct rgb24 {
uint8_t r;
uint8_t g;
uint8_t b;
};
template <class to_type, class from_type>
to_type convert_color(const from_type &from);
template <>
inline hilbert_color convert_color<hilbert_color, rgb24>(const rgb24 &from) {
return __euler_encode_color(from.r, from.g, from.b);
}
template <class color_t>
class image {
public:
bool delete_buffer_on_destruct;
color_t *buffer;
unsigned width;
unsigned height;
unsigned pitch;//in sizeof(color_t)
image()
: delete_buffer_on_destruct(false), buffer(0), width(0), height(0),
pitch(0) {}
image(unsigned width, unsigned height)
: delete_buffer_on_destruct(true), buffer(new color_t[width * height]),
width(width), height(height), pitch(width) {}
image(
color_t *buffer, unsigned width, unsigned height, unsigned pitch,
bool delete_buffer_on_destruct)
: delete_buffer_on_destruct(delete_buffer_on_destruct), buffer(buffer),
width(width), height(height), pitch(pitch) {}
~image() {
if (delete_buffer_on_destruct && buffer)
delete[] buffer;
}
image(const image<color_t> &other) = delete;
image(image<color_t> &&other)
: delete_buffer_on_destruct(other.delete_buffer_on_destruct),
buffer(other.buffer), width(other.width), height(other.height),
pitch(other.pitch) {
other.buffer = 0;
}
image<color_t> &operator =(const image<color_t> &other) = delete;
image<color_t> &operator =(image<color_t> &&other) {
if (delete_buffer_on_destruct && buffer)
delete[] buffer;
delete_buffer_on_destruct = other.delete_buffer_on_destruct;
buffer = other.buffer;
width = other.width;
height = other.height;
pitch = other.pitch;
other.buffer = 0;
return *this;
}
color_t get(unsigned x, unsigned y) const {
return buffer[y * pitch + x];
}
void set(unsigned x, unsigned y, const color_t &c) {
buffer[y * pitch + x] = c;
}
};
//it is assumed that the regions do not overlap in memory.
//copies into [to_x, to_x + width) x [to_y, to_y + height)
//from [from_x, from_x + width) x [from_y, from_y + height).
template <class color_t>
void copy_region(
image<color_t> &to, const image<color_t> &from, unsigned from_x,
unsigned from_y, unsigned to_x, unsigned to_y, unsigned width,
unsigned height) {
color_t *to_start = to.buffer + to.pitch * to_y + to_x;
const color_t *from_start = from.buffer + from.pitch * from_y + from_x;
for (unsigned y = 0; y < height; ++y)
memcpy(
to_start + to.pitch * y, from_start + from.pitch * y,
width * sizeof(color_t));
}
//it is assumed that the regions do not overlap in memory.
//copies into [to_x, to_x + width) x [to_y, to_y + height)
//from [from_x, from_x + width) x [from_y, from_y + height).
template <
class to_color_t, class from_color_t,
to_color_t converter(const from_color_t &) =
convert_color<to_color_t, from_color_t>>
void copy_region(
image<to_color_t> &to, const image<from_color_t> &from, unsigned from_x,
unsigned from_y, unsigned to_x, unsigned to_y, unsigned width,
unsigned height) {
to_color_t *to_start = to.buffer + to.pitch * to_y + to_x;
const from_color_t *from_start =
from.buffer + from.pitch * from_y + from_x;
for (unsigned y = 0; y < height; ++y)
for (unsigned x = 0; x < width; ++x)
to_start[to.pitch * y + x] = converter(from_start[from.pitch * y + x]);
}
image<hilbert_color> get_hilbert_framebuffer();
bool try_load_ppm(std::FILE *input, image<rgb24> &into);
}
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