Images

Table of contents

1. Introduction
2. Reading images
3. Test your skills!

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Introduction

Images are a very important tool in MiniLibX in order to embrace its full potential. These functions will allow you to read files directly into a image object. This is very useful for textures or sprites of course.

Reading images

To read from a file to a image object, you need either the XMP or PNG format. In order to read we can call the functions mlx_xpm_file_to_image and mlx_png_file_to_image accordingly. Do mind that mlx_png_file_to_image currently leaks memory. Both functions accept exactly the same parameters and their usage is identical.

Now, lets read from an image, shall we?

#include <mlx.h>

int	main(void)
{
	void	*mlx;
	void	*img;
	char	*relative_path = "./test.xpm";
	int		img_width;
	int		img_height;

	mlx = mlx_init();
	img = mlx_xpm_file_to_image(mlx, relative_path, &img_width, &img_height);
}

If the img variable is equal to NULL, it means that the image reading has failed. It will also set the img_width and img_height accordingly, which is ideal when reading sprites.

Test your skills!

Now that you know how to read from files, lets get started on making more graphical stuff ;). Create the following programs:

• Import a cursor of your choice and allow it to roam within the window freely.
• Import a texture and replicate it accross your entire window.