Using SurfaceTexture in Android

Question

I want to play a video into an OpenGL texture on XOOM using Android 3.0. I have come across SurfaceTexture in the goole developer docs which has been added in API 11 http://

Answer 1

Example code. This creates a new external texture suitable for use in a SurfaceTexture, then wraps it in said SurfaceTexture and passes it to the camera as a surface to write the preview into.

int[] textures = new int[1];
// generate one texture pointer and bind it as an external texture.
GLES20.glGenTextures(1, textures, 0);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, textures[0]);
// No mip-mapping with camera source.
GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,
        GL10.GL_TEXTURE_MIN_FILTER,
                        GL10.GL_LINEAR);        
GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,
        GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
// Clamp to edge is only option.
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,
        GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES,
        GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE);


int texture_id = textures[0];
SurfaceTexture mTexture = new SurfaceTexture(texture_id);
mTexture.setOnFrameAvailableListener(this);

Camera cam = Camera.open();
cam.setPreviewTexture(mTexture);

Note that if you render this object, you'll need to be careful: It's NOT a 2D texture, so it needs special treatment in the shader.