OpenGL Textures - correction

SDL Development
1

I wrote SDL_LoadBMP, of course, I meant to say SDL_image

Peter> ----- Original Message -----

From: @Peter_Venis (Peter Venis)
To:
Sent: Monday, August 13, 2001 10:49 AM
Subject: Re: [SDL] OpenGL Textures

You could use SDL_LoadBMP to load the texture. And for many that is a
sufficient way, but it has one great dissadvantadge. You have to store the
bitmap in a standard format (like BMP) and so everybody can view the
images
in your directory prior to playing your game or application. In many
cases,
you don’t want that.

One easy way to make your own image file format is to make a small
seperate
application that loads the image using a image library like SDL_LoadBMP or
OpenIL(can load almost any image format) and then storing the pixel
information using the following C++ functions:

FILE fout;
fout = fopen(“my_format.bmf”, “wb”);
fwrite(pixel_data, 1, 256256, fout);
fclose(fout);

You don’t need a file header or other shit since no one else is supposed
to
read the file. After this you write the code in your main application that
loads the file my_format.bmf. You can use this simple code:

FILE fin;
fin = fopen(“my_format.bmf”, “rb”);
GLubyte pixel_data[256256];
fread( pixel_data, 1, 256*256, fin );
fclose(fin);

You can also store numerous textures into one big file. After this you use
the OpenGL functions to convert the array of pixel-data to an OpenGL
texture.

Hope this helps,

Peter

----- Original Message -----
From: Adam Gates
To: sdl_ml
Sent: Monday, August 13, 2001 6:10 AM
Subject: [SDL] OpenGL Textures

What is the best way to load image files into OpenGL textures?
Should I use SDL_image to load it and then convert to an OpenGL texture?
(Anybody have code for that?)
Or use some other library?

Adam.

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