Method WriteToFile

BeefySysLib/img/BMPData.cpp:476–531

}

bool BMPData::WriteToFile(const StringImpl& path)
{
	FILE* file;
	int16_t magic_number;
	bmp_file_header_t file_header;
	bmp_bitmap_info_header_t info_header;
	unsigned char sample[3], * p;
	int i, j;

	file = fopen(path.c_str(), "wb");
	if (!file) 
	{		
		return false;
	}

	magic_number = BITMAP_MAGIC_NUMBER;

	file_header.size = mWidth * mHeight * 4 + 54;
	file_header.app_id = 0;
	file_header.offset = 54;

	info_header.header_size = 40;
	info_header.width = mWidth;
	info_header.height = mHeight;
	info_header.num_planes = 1;
	info_header.bpp = 24;
	info_header.compression = 0;
	info_header.image_size = mWidth * mHeight * 4;
	info_header.horizontal_resolution = 0;
	info_header.vertical_resolution = 0;
	info_header.colors_used = 0;
	info_header.colors_important = 0;

	fwrite(&magic_number, sizeof(magic_number), 1, file);
	fwrite(&file_header, sizeof(bmp_file_header_t), 1, file);
	fwrite(&info_header, sizeof(bmp_bitmap_info_header_t), 1, file);

	p = (unsigned char*)mBits;
	for (i = 0; i < mHeight; i++) 
	{
		for (j = 0; j < mWidth; j++) 
		{
			/* convert RGBA to BGR */
			sample[2] = *p; p++;
			sample[1] = *p; p++;
			sample[0] = *p; p++;
			p++;

			fwrite(sample, 3, 1, file);
		}
	}

	fclose(file);

	return 0;
}