DDS texture loading

Question

How would I load a dds texture file into an OpenGL 2dtexture or cube map texture?

Dan Olson · Accepted Answer · 2009-02-23 10:25:54Z

4

I believe you use the glCompressedTexImage2DARB method and its friends.

This PDF seems to contain some promising info that may be helpful to you.

answered Feb 23, 2009 at 10:25

Dan Olson

23.5k4 gold badges45 silver badges56 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

rotoglup · Accepted Answer · 2009-02-26 07:17:59Z

3

Depending on your needs, the DevIL library can take care of feeding OpenGL with a DDS file content.

answered Feb 26, 2009 at 7:17

rotoglup

5,30329 silver badges38 bronze badges

Comments

Richard Viney · Accepted Answer · 2009-02-23 13:31:45Z

If the DDS contains a compressed texture then use glCompressedTexImage2DARB(), if it contains uncompressed data the usual glTexImage2D procedure applies. Once for each mipmap level if the DDS file contains mipmaps, and once for each cubemap face if its a cubemap.

For how to go about reading the header and data in a DDS file look up the documentation for it on MSDN or in the DirectX SDK. It's a fairly standard container format, there aren't too many surprises.

Be aware that DDS uses a top-left image origin whereas OpenGL assumes a bottom-left origin for image data. This means you will probably want to vertically flip a DDS image after loading it in. You can do this without decompressing them if they are in DXT1/3/5, but it's a slightly fiddly process that involves bit manipulation on the contents of each 4x4 compression block.

Collectives™ on Stack Overflow

DDS texture loading

3 Answers 3

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related