Texturing and Shading - Learn OpenGL ES: For Mobile Game and Graphics Development - page 191

Listing 5-5. GL TEXTURE/src/com/apress/android/gltexture/GLES20Render-

er.java

int[] textures = new int[1];
GLES20.glGenTextures(1, textures, 0);
_textureId = textures[0];

GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, _textureId);
InputStream is1 =
_context.getResources().openRawResource(R.drawable.brick);
Bitmap img1;
try {
img1 = BitmapFactory.decodeStream(is1);
} finally {
try {
is1.close();
} catch(IOException e) {
// e.printStackTrace();

}

}
GLES20.glPixelStorei(GLES20.GL_UNPACK_ALIGNMENT, 1);
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST); //
or GL_LINEAR
GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,
GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST); //
or GL_LINEAR
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,
GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_REPEAT);
GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,
GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_REPEAT);
GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, img1, 0);

As ES 2.0 supports two types of textures (that is, 2D textures and cubemap textures),
when you have generated a texture object, you must bind its corresponding id to any
of these types (that is, 2D texture or cubemap texture).