/**
* 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;
}