diff options
| -rw-r--r-- | README.md | 19 | ||||
| -rw-r--r-- | main.c | 101 |
2 files changed, 101 insertions, 19 deletions
@@ -1,4 +1,4 @@ -# Converts BLP to PNG +# Converts BLP textures to images This tool converts images in BLP texture file format used in many games such as World of Warcraft into PNG files. @@ -29,6 +29,19 @@ providing files to the tool. ./blpconvert samples/*.blp ``` +Program supports exporting to the following formats: + +- PNG +- BMP +- JPG +- TGA + +By default it will use PNG but you can see use `-f` flag. + +```sh +./blpconvert -f bmp samples/Ability_Ambush.blp +``` + ## Verbose output If you provide `-v` flag the program will output a bunch of diagnostical data. @@ -65,6 +78,10 @@ First few pixels of decoded image (RGBA format): - https://wowwiki-archive.fandom.com/wiki/BLP_file - https://en.wikipedia.org/wiki/S3_Texture_Compression +## Special thanks + +- https://github.com/nothings/stb + ## License [blpconvert](https://github.com/mitjafelicijan/blpconvert) was written by [Mitja @@ -43,6 +43,31 @@ const char *compression_labels[] = { "Uncompressed" // Index 3 }; +typedef enum { + PNG, + BMP, + TGA, + JPG, +} image_format; + +image_format get_format_type(const char *format) { + if (strcasecmp(format, "png") == 0) return PNG; + if (strcasecmp(format, "bmp") == 0) return BMP; + if (strcasecmp(format, "tga") == 0) return TGA; + if (strcasecmp(format, "jpg") == 0 || strcasecmp(format, "jpeg") == 0) return JPG; + return PNG; +} + +bool is_valid_format(const char *format) { + const char *valid_formats[] = {"png", "bmp", "tga", "jpg", "jpeg", NULL}; + for (const char **f = valid_formats; *f != NULL; f++) { + if (strcasecmp(format, *f) == 0) { + return true; + } + } + return false; +} + path_components extract_path_components(const char *filepath) { path_components result; result.fullname = filepath; @@ -196,7 +221,7 @@ void dxt5_to_rgba(const uint8_t *dxt5_block, uint8_t *rgba_pixels) { } } -void decode_dxt_image(const uint8_t *image_data, uint32_t width, uint32_t height, int dxt_type, path_components *path, bool verbose) { +void decode_dxt_image(const uint8_t *image_data, uint32_t width, uint32_t height, int dxt_type, path_components *path, bool verbose, char *format) { uint32_t blocks_wide = (width + 3) / 4; uint32_t blocks_high = (height + 3) / 4; uint32_t total_pixels = width * height; @@ -246,16 +271,46 @@ void decode_dxt_image(const uint8_t *image_data, uint32_t width, uint32_t height } if (verbose) { - printf("Saving decoded image as PNG...\n"); + printf("Saving decoded image...\n"); } char output_filename[512]; - snprintf(output_filename, sizeof(output_filename), "%s/%s.png", path->folder, path->filename); - - if (stbi_write_png(output_filename, width, height, 4, decoded_image, width * 4) == 0) { - printf("Failed to write PNG file\n"); - } else { - printf("Successfully saved %s\n", output_filename); + snprintf(output_filename, sizeof(output_filename), "%s/%s.%s", path->folder, path->filename, format); + + image_format fmt = get_format_type(format); + switch (fmt) { + case PNG: + if (verbose) printf("Processing as PNG format\n"); + if (stbi_write_png(output_filename, width, height, 4, decoded_image, width * 4) == 0) { + printf("Failed to write %s file\n", output_filename); + } else { + printf("Successfully saved %s\n", output_filename); + } + break; + case BMP: + if (verbose) printf("Processing as BMP format\n"); + if (stbi_write_bmp(output_filename, width, height, 4, decoded_image) == 0) { + printf("Failed to write %s file\n", output_filename); + } else { + printf("Successfully saved %s\n", output_filename); + } + break; + case TGA: + if (verbose) printf("Processing as TGA format\n"); + if (stbi_write_tga(output_filename, width, height, 4, decoded_image) == 0) { + printf("Failed to write %s file\n", output_filename); + } else { + printf("Successfully saved %s\n", output_filename); + } + break; + case JPG: + if (verbose) printf("Processing as JPEG format\n"); + if (stbi_write_jpg(output_filename, width, height, 4, decoded_image, 100) == 0) { + printf("Failed to write %s file\n", output_filename); + } else { + printf("Successfully saved %s\n", output_filename); + } + break; } // Print first few pixels for verification. @@ -277,7 +332,7 @@ void decode_dxt_image(const uint8_t *image_data, uint32_t width, uint32_t height free(decoded_image); } -void convert_blp_file(path_components *path, bool verbose) { +void convert_blp_file(path_components *path, bool verbose, char *format) { FILE *file = fopen(path->fullname, "rb"); if (!file) { perror("Error opening file"); @@ -346,13 +401,13 @@ void convert_blp_file(path_components *path, bool verbose) { switch (header.alpha_type) { case 0: // DXT1 - decode_dxt_image(image_data, header.width, header.height, 1, path, verbose); + decode_dxt_image(image_data, header.width, header.height, 1, path, verbose, format); break; case 1: // DXT3 - decode_dxt_image(image_data, header.width, header.height, 3, path, verbose); + decode_dxt_image(image_data, header.width, header.height, 3, path, verbose, format); break; case 7: // DXT5 - decode_dxt_image(image_data, header.width, header.height, 5, path, verbose); + decode_dxt_image(image_data, header.width, header.height, 5, path, verbose, format); break; default: printf("Unsupported alpha type: %d\n", header.alpha_type); @@ -367,16 +422,19 @@ void convert_blp_file(path_components *path, bool verbose) { void print_help(const char *program_name) { printf("Usage: %s [OPTIONS] file1 [file2 ...]\n\n", program_name); printf("Options:\n"); - printf(" -h, --help Display this help message\n"); - printf(" -v, --verbose Enable verbose output\n"); + printf(" -h, --help Display this help message\n"); + printf(" -v, --verbose Enable verbose output\n"); + printf(" -f, --format=FORMAT Set output format (default: png)\n"); + printf(" Options: png, bmp, tga, jpg, jpeg\n"); } - int main(int argc, char *argv[]) { bool verbose = false; + char *format = "png"; int c; static struct option long_options[] = { + {"format", required_argument, 0, 'f'}, {"help", no_argument, 0, 'h'}, {"verbose", no_argument, 0, 'v'}, {0, 0, 0, 0} @@ -385,7 +443,7 @@ int main(int argc, char *argv[]) { // Parse command line options while (1) { int option_index = 0; - c = getopt_long(argc, argv, "hv", long_options, &option_index); + c = getopt_long(argc, argv, "f:hv", long_options, &option_index); if (c == -1) { break; } switch (c) { @@ -395,6 +453,13 @@ int main(int argc, char *argv[]) { case 'v': verbose = true; break; + case 'f': + if (!is_valid_format(optarg)) { + fprintf(stderr, "Error: Invalid format '%s'. Valid formats are: png, bmp, tga, jpg, jpeg\n", optarg); + return 1; + } + format = optarg; + break; case '?': return 1; default: @@ -409,7 +474,6 @@ int main(int argc, char *argv[]) { return 1; } - // Loop though all provided files. while (optind < argc) { path_components path = extract_path_components(argv[optind++]); @@ -420,9 +484,10 @@ int main(int argc, char *argv[]) { printf(" Folder: %s\n", path.folder); printf(" Filename: %s\n", path.filename); printf(" Extension: %s\n", path.extension); + printf(" Format: %s\n", format); } - convert_blp_file(&path, verbose); + convert_blp_file(&path, verbose, format); free_path_components(&path); } |