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1. Loading OpenGL textures from resource files

#4707

Posted by: 2004-07-02 22:33:33

Hi,

I'm currently loading my openGL textures using the following code:


if (TextureImage[0]=LoadBMP("graphics/chair.bmp"))
	{

glGenTextures(1, &texture[0]);			
// Create The Texture
glBindTexture(GL_TEXTURE_2D, texture[0]);
glTexImage2D(GL_TEXTURE_2D, 0, 3, 128, 128, 0, GL_RGB, 
GL_UNSIGNED_BYTE,TextureImage[0]->data);

glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteriGL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 128, 128, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);

	}

This is loading my 128x128 texture properly into memory and I can sucessfully use it later on when I am drawing. The problem is that LoadBMP uses the auxDIBImageLoad function from the glaux library, and it will only load bmps from file, and not from a resource file. Does anyone know how I can correctly put my BMP into memory, and what my two calls to glTexImage2D and gluBuild2DMipmaps would be that would allow me to load from a resource file instead? I want to distribute my executable as a stand-alone package, and not with a bmp directory.

2. Re: Loading OpenGL textures from resource files

#4708

Posted by: upCASE 2004-07-02 22:39:43

Hi!
Use a wxImage instead of a wxBitmap. Try wxImage::GetData() :)

upCASE
-----------------------------------
If it was hard to write, it should be hard to read!- Do. Or do not. There is no try!

3. Re: Loading OpenGL textures from resource files

#4709

Posted by: 2004-07-02 22:59:40

wow upCASE, you were absolutely right. Thanks so much for your help. I added these two lines:


	wxBitmap myBitmap("CHAIR_BMP");

	wxImage myImage(myBitmap.ConvertToImage());

where CHAIR_BMP was defined in my resource file, and then for the data paramater in my gl calls I used myImage.GetData(), and it works great.

Thanks again, this board is awesome.

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