#include #include #include #include #include #include #include #include "../twiddle.hpp" int read_file(const char * filename, uint8_t ** buf, uint32_t * size_out) { FILE * file = fopen(filename, "rb"); if (file == NULL) { fprintf(stderr, "fopen(\"%s\", \"rb\"): %s\n", filename, strerror(errno)); return -1; } int ret; ret = fseek(file, 0L, SEEK_END); if (ret < 0) { fprintf(stderr, "fseek(SEEK_END)"); return -1; } long offset = ftell(file); if (offset < 0) { fprintf(stderr, "ftell"); return -1; } size_t size = offset; ret = fseek(file, 0L, SEEK_SET); if (ret < 0) { fprintf(stderr, "fseek(SEEK_SET)"); return -1; } fprintf(stderr, "read_file: %s size %ld\n", filename, size); *buf = (uint8_t *)malloc(size); size_t fread_size = fread(*buf, 1, size, file); if (fread_size != size) { fprintf(stderr, "fread `%s` short read: %" PRIu64 " ; expected: %" PRIu64 "\n", filename, fread_size, size); return -1; } ret = fclose(file); if (ret < 0) { fprintf(stderr, "fclose"); return -1; } *size_out = size; return 0; } int write_file(const char * filename, const uint8_t * buf, uint32_t size) { FILE * file = fopen(filename, "wb"); if (file == NULL) { fprintf(stderr, "fopen(\"%s\", \"wb\"): %s\n", filename, strerror(errno)); return -1; } size_t write_size = fwrite(buf, 1, size, file); if (write_size != size) { fprintf(stderr, "fwrite: %d %ld %s\n", size, write_size, strerror(errno)); return -1; } int ret = fclose(file); if (ret < 0) { fprintf(stderr, "fclose"); return -1; } return 0; } int main(int argc, const char * argv[]) { if (argc != 3) { fprintf(stderr, "argc != 3\n"); return -1; } uint8_t * buf; uint32_t size; int ret = read_file(argv[1], &buf, &size); assert(ret == 0); // fixme: add pgm support for (int i = 0; i < size; i++) { buf[i] = (buf[i] == 255) ? 1 : 0; } uint8_t * twiddle = (uint8_t *)malloc(size / 2); twiddle::texture_4bpp(twiddle, buf, 64, 32); ret = write_file(argv[2], twiddle, size / 2); assert(ret == 0); }