Esempio n. 1
0
/**
 * 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;
}
Esempio n. 2
0
/**
 * 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;
}