openGL and JOGL

Loading a Texture into OpenGL

Texture images are defined with glTexImage2D. The arguments describe the parameters of the texture image, such as height, width, width of the border, level-of-detail number, and number of color components provided.
The last three arguments describe the way the image is represented in memory, and they are identical to the pixel formats used for glDrawPixels.

Data is read from pixels as a sequence of signed or unsigned bytes, shorts, or longs, or single-precision floating-point values, depending on type. These values are grouped into sets of one, two, three, or four values, depending on format.

void glTexImage2D( GLenum target, 
                   GLint level, 
                   GLint components, 
		   GLsizei width, GLsizei height, GLint border, 
                   GLenum format, 
                   GLenum type, 
                   const GLvoid *pixels )

target	 	
  Specifies the target texture. Must be GL_TEXTURE_2D.

level	 	
  Specifies the level-of-detail number. Level 0 is the base image level. 
  Level n is the nth mipmap reduction image. 

components	 	
  Specifies the number of (internal) color components in the texture. 
  Must be 1, 2, 3, or  4.

width	 	
  Specifies the width of the texture image. Must be 2ⁿ + 2 ( border ) for some
  integer n.

height	 	
 Specifies the height of the texture image. 
 Must be 2^m + 2 ( border ) for some integer m.

border	 	
  Specifies the width of the border. Must be either 0 or 1.

format	 	
  Specifies the (external) format of the pixel data. 
  The following symbolic values are accepted: 
  GL_COLOR_INDEX, GL_RED, GL_GREEN, GL_BLUE, 
  GL_ALPHA, GL_RGB, GL_RGBA, GL_LUMINANCE, and GL_LUMINANCE_ALPHA.

type	 	
  Specifies the data type of the pixel data. 
  The following symbolic values are accepted: 
  GL_UNSIGNED_BYTE, GL_BYTE, GL_BITMAP, GL_UNSIGNED_SHORT, GL_SHORT, 
  GL_UNSIGNED_INT, GL_INT, and GL_FLOAT.

pixels	 	
  Specifies a pointer to the image data in memory.

Example:

	gl.glTexImage2D( 
	  target, 
	  0, // Mipmap level.
	  GL.GL_RGBA,// GL.GL_RGBA, // Internal Texel Format, 
	  texture.getWidth(), texture.getHeight(), 
	  0, //Border
	  GL.GL_RGB, // External format from image, 
	  GL.GL_UNSIGNED_BYTE, 
	  texture.getPixels() // Imagedata
	  );