Rewrite tools/pokemon_animation_graphics.c, and keep void usage and void parse_args at the top of tools' files
This commit is contained in:
Rangi
@@ -1,249 +1,188 @@
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdbool.h>
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#include <getopt.h>
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#include <stdint.h>
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static void usage(void) {
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printf("Usage: pokemon_animation_graphics [-o outfile] [-t mapfile] 2bpp_file dimensions_file\n");
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exit(1);
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}
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#include "common.h"
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struct Options {
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int girafarig;
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const char *out_filename;
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const char *map_filename;
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bool girafarig;
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};
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struct Options Options = {0};
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void usage() {
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fputs("Usage: pokemon_animation_graphics [-h|--help] [-o|--output front.animated.2bpp] [-t|--tilemap front.animated.tilemap] [--girafarig] front.2bpp front.dimensions\n", stderr);
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}
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void parse_args(int argc, char *argv[], struct Options *options) {
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struct option long_options[] = {
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{"output", required_argument, 0, 'o'},
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{"tilemap", required_argument, 0, 't'},
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{"girafarig", no_argument, 0, 'g'},
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{"help", no_argument, 0, 'h'},
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{0}
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};
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for (int opt; (opt = getopt_long(argc, argv, "o:t:h", long_options)) != -1;) {
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switch (opt) {
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case 'o':
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options->out_filename = optarg;
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break;
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case 't':
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options->map_filename = optarg;
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break;
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case 'g':
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options->girafarig = true;
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break;
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case 'h':
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usage();
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exit(0);
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break;
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default:
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usage();
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exit(1);
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}
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}
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}
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struct Tilemap {
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uint8_t* data;
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int size;
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};
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#define TILE_SIZE 16
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struct Graphic {
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uint8_t* data;
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int size;
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};
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void transpose_tiles(uint8_t* tiles, int width, int size, int tile_size) {
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int i;
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int j;
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uint8_t* new_tiles;
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new_tiles = malloc(size);
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for (i = 0; i < size; i++) {
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j = i / tile_size * width * tile_size;
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j = j % size + tile_size * (j / size) + i % tile_size;
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void transpose_tiles(uint8_t *tiles, int width, int size) {
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uint8_t *new_tiles = malloc_verbose(size);
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for (int i = 0; i < size; i++) {
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int j = i / TILE_SIZE * width * TILE_SIZE;
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j = (j / size) * TILE_SIZE + j % size + i % TILE_SIZE;
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new_tiles[j] = tiles[i];
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}
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memcpy(tiles, new_tiles, size);
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free(new_tiles);
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}
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bool compare_tile(uint8_t *tile, uint8_t *other) {
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int j;
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for (j = 0; j < 16; j++) {
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if (tile[j] != other[j]) {
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return false;
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}
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}
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return true;
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}
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int get_tile_index(uint8_t* tile, uint8_t* tiles, int num_tiles, int preferred_tile_id) {
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int get_tile_index(const uint8_t *tile, const uint8_t *tiles, int num_tiles, int preferred_tile_id) {
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if (preferred_tile_id >= 0 && preferred_tile_id < num_tiles) {
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uint8_t *other = &tiles[preferred_tile_id * 16];
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if (compare_tile(tile, other)) {
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if (!memcmp(tile, &tiles[preferred_tile_id * TILE_SIZE], TILE_SIZE)) {
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return preferred_tile_id;
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}
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}
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int i;
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for (i = 0; i < num_tiles; i++) {
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uint8_t *other = &tiles[i * 16];
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if (compare_tile(tile, other)) {
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for (int i = 0; i < num_tiles; i++) {
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if (!memcmp(tile, &tiles[i * TILE_SIZE], TILE_SIZE)) {
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return i;
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}
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}
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return -1;
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}
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FILE *fopen_verbose(char *filename, char *mode) {
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FILE *f = fopen(filename, mode);
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if (!f) {
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fprintf(stderr, "Could not open file: \"%s\"\n", filename);
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uint8_t read_dimensions(const char *filename) {
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long filesize;
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uint8_t *bytes = read_u8(filename, &filesize);
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if (filesize != 1) {
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error_exit("%s: invalid dimensions file\n", filename);
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}
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return f;
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uint8_t dimensions = bytes[0];
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free(bytes);
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return dimensions;
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}
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void create_tilemap(struct Tilemap* tilemap, struct Graphic* graphic, char* graphics_filename, int width, int height) {
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long graphics_size;
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uint8_t* graphics;
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FILE* f;
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int i;
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int tile;
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uint8_t *read_tiles(const char *filename, int width, int height, long *tiles_size) {
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int frame_size = width * height * TILE_SIZE;
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f = fopen_verbose(graphics_filename, "rb");
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if (!f) {
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exit(1);
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}
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fseek(f, 0, SEEK_END);
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graphics_size = ftell(f);
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if (!graphics_size) {
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fprintf(stderr, "empty file %s\n", graphics_filename);
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exit(1);
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}
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rewind(f);
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graphics = malloc(graphics_size);
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if (!graphics) {
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fprintf(stderr, "malloc failure\n");
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exit(1);
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}
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if (graphics_size != (long)fread(graphics, 1, graphics_size, f)) {
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fprintf(stderr, "failed to read file %s\n", graphics_filename);
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exit(1);
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}
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fclose(f);
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int num_tiles_per_frame = width * height;
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int tile_size = 16;
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int num_frames = graphics_size / (tile_size * num_tiles_per_frame);
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int frame_size = num_tiles_per_frame * tile_size;
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// transpose each frame
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for (i = 0; i < num_frames; i++) {
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transpose_tiles(graphics + i * frame_size, width, frame_size, tile_size);
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uint8_t *tiles = read_u8(filename, tiles_size);
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if (!*tiles_size) {
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error_exit("%s: empty file\n", filename);
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} else if (*tiles_size % TILE_SIZE) {
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error_exit("%s: not divisible into 8x8-px 2bpp tiles\n", filename);
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} else if (*tiles_size % frame_size) {
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error_exit("%s: not divisible into %dx%d-tile frames\n", filename, width, height);
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}
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// first frame is naively populated with redundant tiles,
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// so fill it unconditionally and start from the second frame
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int num_tiles = width * height;
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int tilemap_size = graphics_size / tile_size;
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tilemap->data = malloc(tilemap_size * 2);
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for (i = 0; i < num_tiles; i++) {
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tilemap->data[tilemap->size] = i;
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tilemap->size++;
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int num_frames = *tiles_size / frame_size;
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for (int i = 0; i < num_frames; i++) {
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transpose_tiles(&tiles[i * frame_size], width, frame_size);
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}
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for (i = num_tiles; i < tilemap_size; i++) {
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int preferred = i % num_tiles_per_frame;
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int index = get_tile_index(graphics + i * tile_size, graphics, i, preferred);
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if (Options.girafarig && index == 0) {
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return tiles;
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}
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void write_graphics(const char *filename, const uint8_t *tiles, long tiles_size, int num_tiles_per_frame, bool girafarig) {
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int max_size = tiles_size;
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int max_num_tiles = max_size / TILE_SIZE;
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if (girafarig) {
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// Ensure space for a duplicate of tile 0 at the end
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max_size += TILE_SIZE;
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}
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uint8_t *data = malloc_verbose(max_size);
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int num_tiles = 0;
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#define DATA_APPEND_TILES(tile, length) do { \
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memcpy(&data[num_tiles * TILE_SIZE], &tiles[(tile) * TILE_SIZE], (length) * TILE_SIZE); \
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num_tiles += (length); \
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} while (0)
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// Copy the first frame directly
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DATA_APPEND_TILES(0, num_tiles_per_frame);
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// Skip redundant tiles in the animated frames
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for (int i = num_tiles_per_frame; i < max_num_tiles; i++) {
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int index = get_tile_index(&tiles[i * TILE_SIZE], data, num_tiles, i % num_tiles_per_frame);
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if (index == -1) {
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DATA_APPEND_TILES(i, 1);
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}
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}
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if (girafarig) {
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// Add a duplicate of tile 0 to the end
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DATA_APPEND_TILES(0, 1);
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}
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#undef DATA_APPEND_TILES
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write_u8(filename, data, num_tiles * TILE_SIZE);
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free(data);
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}
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void write_tilemap(const char *filename, const uint8_t *tiles, long tiles_size, int num_tiles_per_frame, bool girafarig) {
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int size = tiles_size / TILE_SIZE;
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uint8_t *data = malloc_verbose(size);
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int num_tiles = num_tiles_per_frame;
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// Copy the first frame directly
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for (int i = 0; i < num_tiles_per_frame; i++) {
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data[i] = i;
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}
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// Skip redundant tiles in the animated frames
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for (int i = num_tiles_per_frame; i < size; i++) {
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int index = get_tile_index(&tiles[i * TILE_SIZE], tiles, i, i % num_tiles_per_frame);
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int tile;
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if (girafarig && index == 0) {
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tile = num_tiles;
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} else if (index == -1) {
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tile = num_tiles++;
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} else {
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tile = tilemap->data[index];
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tile = data[index];
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}
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tilemap->data[tilemap->size] = tile;
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tilemap->size++;
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data[i] = tile;
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}
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int graphic_size = tilemap->size * 16;
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if (Options.girafarig) {
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// This is probably not needed, but just in case...
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graphic_size += 16;
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}
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graphic->data = malloc(graphic_size);
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graphic->size = 16 * width * height;
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memcpy(graphic->data, graphics, graphic->size);
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for (i = width * height; i < tilemap->size; i++) {
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tile = get_tile_index(graphics + 16 * i, graphic->data, graphic->size / 16, i % num_tiles_per_frame);
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if (tile == -1) {
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memcpy(graphic->data + graphic->size, graphics + 16 * i, 16);
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graphic->size += 16;
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}
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}
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if (Options.girafarig) {
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// Add a duplicate of tile 0 to the end.
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memcpy(graphic->data + graphic->size, graphics, 16);
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graphic->size += 16;
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}
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free(graphics);
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write_u8(filename, data, size);
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free(data);
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}
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int main(int argc, char* argv[]) {
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char* dimensions_filename;
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char* graphics_filename;
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char* outfile = NULL;
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char* mapfile = NULL;
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FILE* f;
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uint8_t bytes[1];
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int width;
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int height;
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struct Graphic graphic = {0};
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struct Tilemap tilemap = {0};
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int main(int argc, char *argv[]) {
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struct Options options = {0};
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parse_args(argc, argv, &options);
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while (1) {
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struct option long_options[] = {
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{"girafarig", no_argument, &Options.girafarig, 1},
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{"tilemap", required_argument, 0, 't'},
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{"output", required_argument, 0, 'o'},
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{0}
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};
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int long_option_index = 0;
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int opt = getopt_long(argc, argv, "o:t:", long_options, &long_option_index);
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if (opt == -1) {
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break;
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}
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switch (opt) {
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case 0:
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break;
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case 'o':
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outfile = optarg;
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break;
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case 't':
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mapfile = optarg;
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break;
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default:
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usage();
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break;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc < 2) {
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usage();
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}
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graphics_filename = argv[0];
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dimensions_filename = argv[1];
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f = fopen_verbose(dimensions_filename, "rb");
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if (!f) {
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exit(1);
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}
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if (1 != fread(bytes, 1, 1, f)) {
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fprintf(stderr, "failed to read file %s\n", dimensions_filename);
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exit(1);
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uint8_t dimensions = read_dimensions(argv[1]);
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int width = dimensions & 0xF;
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int height = dimensions >> 4;
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long tiles_size;
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uint8_t *tiles = read_tiles(argv[0], width, height, &tiles_size);
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if (options.out_filename) {
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write_graphics(options.out_filename, tiles, tiles_size, width * height, options.girafarig);
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}
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fclose(f);
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width = bytes[0] & 0xf;
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height = bytes[0] >> 4;
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create_tilemap(&tilemap, &graphic, graphics_filename, width, height);
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if (outfile) {
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f = fopen_verbose(outfile, "wb");
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if (f) {
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fwrite(graphic.data, 1, graphic.size, f);
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fclose(f);
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}
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if (options.map_filename) {
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write_tilemap(options.map_filename, tiles, tiles_size, width * height, options.girafarig);
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}
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if (mapfile) {
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f = fopen_verbose(mapfile, "wb");
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if (f) {
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fwrite(tilemap.data, 1, tilemap.size, f);
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fclose(f);
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}
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}
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free(graphic.data);
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free(tilemap.data);
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free(tiles);
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return 0;
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}
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