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#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <algorithm>
#include <tuple>
#include <cstdint>
#include <cstring>
#include <cassert>
#include "../lodepng.h"
#include "compute_host.h"
#include "defs.h"
#include "kernel.h"
using namespace std;
static void writeCounts(int W, int H, const vector<int> &counts, const char *fname) {
ofstream f(fname);
f << W << ' ' << H << '\n';
for (int y = 0; y < H; y++) {
for (int x = 0; x < W; x++) {
if (x != 0) f << ' ';
f << counts[W * y + x];
}
f << '\n';
}
}
static tuple<int, int, vector<int>> readCounts(const char *fname) {
ifstream f(fname);
int W, H;
f >> W >> H;
vector<int> counts(W * H);
for (int &v : counts) f >> v;
return make_tuple(W, H, counts);
}
static int rankCounts(vector<int> &counts) {
int maxcount = 0;
for (int i = 0; i < (int)counts.size(); i++) {
maxcount = max(maxcount, counts[i]);
}
vector<int> cumul(maxcount + 1, 0);
for (int v : counts) cumul[v]++;
cumul[0] = 0;
for (int i = 1; i < (int)cumul.size(); i++) cumul[i] += cumul[i-1];
// assert(cumul[maxcount + 1] == (int)counts.size());
for (int &v : counts) v = cumul[v];
return cumul[maxcount];
}
static vector<uint8_t> drawImage(int W, int H, const vector<int> &counts, int maxcount) {
vector<uint8_t> image(3 * W * H);
for (int y = 0; y < H; y++) {
for (int x = 0; x < W; x++) {
double value = (double)counts[W * y + x] / maxcount * 255;
image[3 * (W * y + x) + 0] = value;
image[3 * (W * y + x) + 1] = value;
image[3 * (W * y + x) + 2] = value;
}
}
return image;
}
int main(int argc, char **argv) {
int W, H;
vector<int> counts;
if (argc <= 1) {
W = H = 900;
const Com bottomLeft = Com(-1.5, -1.5);
const Com topRight = Com(1.5, 1.5);
// counts = computeHost(W, H, bottomLeft, topRight);
Kernel().run_chunked(counts, W, H, bottomLeft, topRight, 42, 1 << 14);
// Kernel().run_all(counts, W, H, bottomLeft, topRight, 42);
writeCounts(W, H, counts, "out.txt");
} else if (argc == 2 && strcmp(argv[1], "-h") != 0) {
tie(W, H, counts) = readCounts(argv[1]);
} else {
cerr << "Usage: " << argv[0] << " -- compute and draw" << endl;
cerr << "Usage: " << argv[0] << " <out.txt> -- draw already-computed data" << endl;
return 1;
}
int maxcount = rankCounts(counts);
vector<uint8_t> image = drawImage(W, H, counts, maxcount);
assert(lodepng_encode24_file("out.png", image.data(), W, H) == 0);
}
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