/** * Reads the heightmap and/or size of the heightmap from a BMP file. * If map == nullptr only the size of the BMP is read, otherwise a map * with grayscale pixels is allocated and assigned to *map. */ static bool ReadHeightmapBMP(const char *filename, uint *x, uint *y, byte **map) { FILE *f; BmpInfo info; BmpData data; BmpBuffer buffer; /* Init BmpData */ memset(&data, 0, sizeof(data)); f = FioFOpenFile(filename, "rb", HEIGHTMAP_DIR); if (f == nullptr) { ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_PNGMAP_FILE_NOT_FOUND, WL_ERROR); return false; } BmpInitializeBuffer(&buffer, f); if (!BmpReadHeader(&buffer, &info, &data)) { ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_BMPMAP_IMAGE_TYPE, WL_ERROR); fclose(f); BmpDestroyData(&data); return false; } /* Check if image dimensions don't overflow a size_t to avoid memory corruption. */ if ((uint64)info.width * info.height >= (size_t)-1 / (info.bpp == 24 ? 3 : 1)) { ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_HEIGHTMAP_TOO_LARGE, WL_ERROR); fclose(f); BmpDestroyData(&data); return false; } if (map != nullptr) { if (!BmpReadBitmap(&buffer, &info, &data)) { ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_BMPMAP_IMAGE_TYPE, WL_ERROR); fclose(f); BmpDestroyData(&data); return false; } *map = MallocT<byte>(info.width * info.height); ReadHeightmapBMPImageData(*map, &info, &data); } BmpDestroyData(&data); *x = info.width; *y = info.height; fclose(f); return true; }
/** * Reads the heightmap and/or size of the heightmap from a BMP file. * If map == NULL only the size of the BMP is read, otherwise a map * with grayscale pixels is allocated and assigned to *map. */ static bool ReadHeightmapBMP(char *filename, uint *x, uint *y, byte **map) { FILE *f; BmpInfo info; BmpData data; BmpBuffer buffer; /* Init BmpData */ memset(&data, 0, sizeof(data)); f = FioFOpenFile(filename, "rb"); if (f == NULL) { ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_PNGMAP_FILE_NOT_FOUND, WL_ERROR); return false; } BmpInitializeBuffer(&buffer, f); if (!BmpReadHeader(&buffer, &info, &data)) { ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_BMPMAP_IMAGE_TYPE, WL_ERROR); fclose(f); BmpDestroyData(&data); return false; } if (map != NULL) { if (!BmpReadBitmap(&buffer, &info, &data)) { ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_BMPMAP_IMAGE_TYPE, WL_ERROR); fclose(f); BmpDestroyData(&data); return false; } *map = MallocT<byte>(info.width * info.height); ReadHeightmapBMPImageData(*map, &info, &data); } BmpDestroyData(&data); *x = info.width; *y = info.height; fclose(f); return true; }