// ramToPpm: write the displayed hires page of a 64K RAM dump as a PPM.
// usage: ramToPpm dump.bin out.ppm [1|2]

#include <stdio.h>
#include <stdlib.h>
#include "hires.h"
#include "machine.h"


int main(int argc, char **argv) {
        if (argc < 3) {
                fprintf(stderr, "usage: %s dump.bin out.ppm [1|2]\n", argv[0]);
                return 2;
        }
        FILE *f = fopen(argv[1], "rb");
        if (f == NULL || fread(fs2Ram, 1, MACHINE_RAM_SIZE, f) != MACHINE_RAM_SIZE) {
                fprintf(stderr, "cannot read %s\n", argv[1]);
                return 1;
        }
        fclose(f);
        int      page   = (argc > 3) ? atoi(argv[3]) : 1;
        uint32_t *pixels = malloc((size_t)HIRES_WIDTH * HIRES_ROWS * sizeof(uint32_t));
        hiresDecodeToRgb(page == 2 ? MACHINE_HIRES_PAGE2 : MACHINE_HIRES_PAGE1, pixels);
        FILE *o = fopen(argv[2], "wb");
        if (o == NULL) {
                fprintf(stderr, "cannot write %s\n", argv[2]);
                return 1;
        }
        fprintf(o, "P6\n%d %d\n255\n", HIRES_WIDTH, HIRES_ROWS);
        for (int i = 0; i < HIRES_WIDTH * HIRES_ROWS; i++) {
                uint8_t rgb[3] = { (uint8_t)(pixels[i] >> 16), (uint8_t)(pixels[i] >> 8), (uint8_t)pixels[i] };
                fwrite(rgb, 1, 3, o);
        }
        fclose(o);
        free(pixels);
        return 0;
}