10 replies to this topic

[ThetaRabbit]

Hi all. I use SOIL with OpenGL. This is a sample from of code lonesock.net/soil.html :

GLuint tex_2d = SOIL_load_OGL_texture
(
"img.png",
SOIL_LOAD_AUTO,
SOIL_CREATE_NEW_ID,
SOIL_FLAG_MIPMAPS | SOIL_FLAG_INVERT_Y | SOIL_FLAG_NTSC_SAFE_RGB | SOIL_FLAG_COMPRESS_TO_DXT
);

How can I unload my texture from memory after using this code?

sorry for my bad english.

[RobinsonUK]

When you say unload, you mean delete the texture?

glDeleteTextures(1, &tex_2d);

The above will delete the texture.

[ThetaRabbit]

I need to delete texture data from memory. glDeleteTextures can do it?

[RobinsonUK]

Yes.

[mhagain]

Depends on which memory you want to unload it from. If you want to unload it from video memory then glDeleteTextures is indeed what you want - the texture will be gone (eventually - glDeleteTextures most likely won't remove it immediately and doesn't actually make any promises about the backing memory store (which may e.g. be kept around for potential future reuse) - all it deals with is the texture object name) and you will never be able to use it again in your OpenGL code unless you recreate it.

[ThetaRabbit]

So what, if I want to delete texture from RAM after loading it with SOIL?

[mhagain]

I'm not familiar with SOIL but I would be amazed if it didn't already do this for you.

[slicer4ever]

looking at the SOIL source, i believe your looking for:

SOIL_free_image_data

look at the header for more information, and i don't claim to be 100% correct, i've never used soil, but i don't see anything else that seems to indicate deleting behavior.

[RobinsonUK]

looking at the SOIL source, i believe your looking for:

SOIL_free_image_data

look at the header for more information, and i don't claim to be 100% correct, i've never used soil, but i don't see anything else that seems to indicate deleting behavior.

I think that's only if you've loaded the file with SOIL_load_image, because it returns an unsigned char buffer *, not an OpenGL asset ID.

[mhagain]

Documented sample code for loading a texture: http://lonesock.net/soil.html and http://libregamewiki...L_Image_Library

SOIL.c, SOIL_load_OGL_texture function, lines 154 and 155:

/*	and nuke the image data	*/
	SOIL_free_image_data( img );

There is no need to do anything yourself to free the data.

[slicer4ever]

looking at the SOIL source, i believe your looking for:

SOIL_free_image_data

look at the header for more information, and i don't claim to be 100% correct, i've never used soil, but i don't see anything else that seems to indicate deleting behavior.

I think that's only if you've loaded the file with SOIL_load_image, because it returns an unsigned char buffer *, not an OpenGL asset ID.

you are correct sir, i skimmed over the header file, and saw that, and assumed it was what he was looking for in terms of SOIL consistency.