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Add C build tools.
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yenatch
256
tools/pokemon_animation.c
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256
tools/pokemon_animation.c
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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struct Frame {
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uint8_t* data;
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int size;
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int bitmask;
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};
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struct Frames {
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struct Frame* frames;
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int num_frames;
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int frame_size;
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};
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struct Bitmask {
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uint8_t* data;
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int bitlength;
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};
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struct Bitmasks {
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struct Bitmask* bitmasks;
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int num_bitmasks;
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};
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void make_frames(struct Frames* frames, struct Bitmasks* bitmasks, char* tilemap_filename, char* dimensions_filename);
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int bitmask_exists(struct Bitmask bitmask, struct Bitmasks bitmasks);
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void print_frames();
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void make_frames(struct Frames* frames, struct Bitmasks* bitmasks, char* tilemap_filename, char* dimensions_filename) {
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uint8_t* tilemap;
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uint8_t* this_frame;
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FILE* f;
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long size;
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int width;
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int height;
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uint8_t byte;
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struct Frame* frame;
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struct Bitmask* bitmask;
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int frame_size;
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int num_frames;
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int i, j;
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f = fopen(tilemap_filename, "rb");
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if (f == NULL) {
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fprintf(stderr, "could not open file %s", tilemap_filename);
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exit(1);
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}
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fseek(f, 0, SEEK_END);
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size = ftell(f);
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rewind(f);
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tilemap = malloc(size);
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fread(tilemap, 1, size, f);
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fclose(f);
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f = fopen(dimensions_filename, "rb");
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if (f == NULL) {
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fprintf(stderr, "could not open file %s", dimensions_filename);
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exit(1);
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}
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fread(&byte, 1, 1, f);
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fclose(f);
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width = byte & 0xf;
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height = byte >> 4;
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frame_size = width * height;
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num_frames = size / frame_size - 1;
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//fprintf(stderr, "num_frames: %d\n", num_frames);
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bitmasks->bitmasks = malloc((sizeof (struct Bitmask*)) * num_frames);
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bitmasks->num_bitmasks = 0;
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frames->frames = malloc((sizeof (struct Frame*)) * num_frames);
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frames->frame_size = frame_size;
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frames->num_frames = 0;
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this_frame = tilemap + frame_size;
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for (i = 0; i < num_frames; i++) {
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frame = (struct Frame*)malloc(sizeof(struct Frame));
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frame->data = malloc(frame_size);
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frame->size = 0;
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bitmask = (struct Bitmask*)malloc(sizeof(struct Bitmask));
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bitmask->data = malloc((frame_size + 7) / 8);
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bitmask->bitlength = 0;
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for (j = 0; j < frame_size; j++) {
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if (this_frame[j] != tilemap[j]) {
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frame->data[frame->size] = this_frame[j];
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frame->size++;
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bitmask->data[bitmask->bitlength / 8] |= 1;
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}
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bitmask->bitlength++;
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if (bitmask->bitlength % 8 != 0) {
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bitmask->data[bitmask->bitlength / 8] <<= 1;
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}
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}
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frame->bitmask = bitmask_exists(*bitmask, *bitmasks);
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if (frame->bitmask == -1) {
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frame->bitmask = bitmasks->num_bitmasks;
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bitmasks->bitmasks[bitmasks->num_bitmasks] = *bitmask;
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bitmasks->num_bitmasks++;
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} else {
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free(bitmask->data);
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free(bitmask);
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}
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frames->frames[i] = *frame;
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frames->num_frames++;
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this_frame += frame_size;
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}
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//for (i = 0; i < frames->num_frames; i++) {
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//free(frames->frames[i].data);
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//free(frames->frames[i]);
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//}
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//free(frames->frames);
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//fprintf(stderr, "num bitmasks: %d", bitmasks->num_bitmasks);
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//for (i = 0; i < bitmasks->num_bitmasks; i++) {
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// free(bitmasks->bitmasks[i].data);
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// fprintf(stderr, "freed bitmask %d\n", i);
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//free(bitmasks->bitmasks[i]);
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//}
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//free(bitmasks->bitmasks);
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//fprintf(stderr, "freed bitmasks\n");
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free(tilemap);
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}
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int bitmask_exists(struct Bitmask bitmask, struct Bitmasks bitmasks) {
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int i, j;
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struct Bitmask existing;
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for (i = 0; i < bitmasks.num_bitmasks; i++) {
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existing = bitmasks.bitmasks[i];
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if (bitmask.bitlength != existing.bitlength) {
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continue;
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}
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for (j = 0; j < (bitmask.bitlength + 7) / 8; j++) {
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if (bitmask.data[j] != existing.data[j]) {
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break;
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}
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}
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if (j == (bitmask.bitlength + 7) / 8) {
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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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void print_frames(struct Frames* frames) {
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int i;
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int j;
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struct Frame frame;
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for (i = 0; i < frames->num_frames; i++) {
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printf("\tdw .frame%d\n", i + 1);
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}
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for (i = 0; i < frames->num_frames; i++) {
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frame = frames->frames[i];
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printf(".frame%d\n", i + 1);
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printf("\tdb %d\n", frame.bitmask);
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if (frame.size > 0) {
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printf("\tdb %d", frame.data[0]);
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for (j = 1; j < frame.size; j++) {
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printf(", %d", frame.data[j]);
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}
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printf("\n");
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}
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}
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}
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void print_bitmasks(struct Bitmasks* bitmasks) {
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int i, j, k;
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int length;
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struct Bitmask bitmask;
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for (i = 0; i < bitmasks->num_bitmasks; i++) {
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printf("; %d\n", i);
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bitmask = bitmasks->bitmasks[i];
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length = (bitmask.bitlength + 7) / 8;
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for (j = 0; j < length; j++) {
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printf("\tdb %%");
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for (k = 0; k < 8; k++) {
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if ((bitmask.data[j] >> (7 - k)) & 1) {
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printf("1");
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} else {
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printf("0");
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};
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}
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printf("\n");
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}
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}
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}
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// HOW ARE YOU GENTLEMEN.
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char* cats (char* head, char* tail) {
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char* string;
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string = malloc(strlen(head) + strlen(tail) + 1);
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strcpy(string, head);
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strcat(string, tail);
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return string;
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}
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static void usage(void) {
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printf("Usage: pokemon_animation [-b] [-f] tilemap_file dimensions_file\n");
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exit(1);
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}
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int main(int argc, char* argv[]) {
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struct Frames frames = {0};
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struct Bitmasks bitmasks = {0};
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int ch;
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bool use_bitmasks, use_frames;
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char* tilemap_filename;
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char* dimensions_filename;
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while ((ch = getopt(argc, argv, "bf")) != -1) {
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switch (ch) {
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case 'b':
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use_bitmasks = true;
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break;
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case 'f':
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use_frames = true;
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break;
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default:
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usage();
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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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tilemap_filename = argv[0];
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dimensions_filename = argv[1];
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//ext = strrchr(argv[3], '.');
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//if (!ext || ext == argv[3]) {
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// fprintf(stderr, "need a file extension to determine what to write to %s", argv[3]);
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//}
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make_frames(&frames, &bitmasks, tilemap_filename, dimensions_filename);
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if (use_frames) {
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print_frames(&frames);
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}
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if (use_bitmasks) {
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print_bitmasks(&bitmasks);
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}
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return 0;
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}
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