/*
 * fredygames.com: regenerates Brogue CE's assets/tiles.bin for the redrawn tiles.png.
 *
 * tiles.bin holds the sub-pixel alignments that tiles.c finds by brute force for every tile and
 * size (optimizeTiles); the game computes it when the file is missing, which takes minutes and
 * opens a progress window. Since make-tiles.py redraws the text glyphs, the file is recomputed here,
 * once, at build time: this program compiles tiles.c as is, with its window calls replaced by stubs
 * (the optimizer only uses software surfaces), and runs under Node (-sNODERAWFS) on the build tree.
 *
 *     tiles-bin <data directory>    (reads <dir>/assets/tiles.png, writes <dir>/assets/tiles.bin)
 *
 * Part of the source of the build served at fredygames.com (AGPL-3.0-or-later, like Brogue CE).
 */
#include <SDL.h>
#include <SDL_image.h>
#include <stdio.h>
#include <string.h>

static SDL_Surface *previewSurface;

static SDL_Window *stubCreateWindow(void) { return NULL; }
static SDL_Surface *stubGetWindowSurface(void) {
    if (!previewSurface) {
        previewSurface = SDL_CreateRGBSurfaceWithFormat(0, 128, 232, 32, SDL_PIXELFORMAT_ARGB8888);
    }
    return previewSurface;
}

#define SDL_CreateWindow(...) stubCreateWindow()
#define SDL_SetWindowTitle(...) ((void)0)
#define SDL_GetWindowSurface(...) stubGetWindowSurface()
#define SDL_UpdateWindowSurface(...) 0
#define SDL_PollEvent(...) 0
#define SDL_DestroyWindow(...) ((void)0)

#include "tiles.c"

/* Symbols tiles.c uses from the rest of the game; only the optimizer runs here. */
char dataDirectory[BROGUE_FILENAME_MAX];
boolean fileExists(const char *pathname) {
    FILE *f = fopen(pathname, "rb");
    if (f) fclose(f);
    return f != NULL;
}

int main(int argc, char **argv) {
    if (argc != 2) {
        fprintf(stderr, "usage: tiles-bin <data directory>\n");
        return 1;
    }
    strcpy(dataDirectory, argv[1]);
    if (!(IMG_Init(IMG_INIT_PNG) & IMG_INIT_PNG)) return 1;
    initTiles(); /* no tiles.bin yet: optimizes every tile and writes it */
    return 0;
}