Loads a texture from a resource ID, returning the OpenGL ID for that texture. Returns 0 if the load failed. @param context @param resourceId @return

Checks to see if a GLES error has been raised.

Checks to see if a GLES error has been raised.

Discards all resources held by this class, notably the EGL context. This must be called from the thread where the context was created. <p> On complet

Checks for EGL errors. Throws an exception if an error has been raised.

合并两个short，返回一个short

调节音量的方法

把一个short转换为一个长度为2的byte数组

Creates an EGL surface associated with a Surface. <p> If this is destined for MediaCodec, the EGLConfig should have the "recordable" attribute.

Create a Rotation from an integer. Needs to be either 0, 90, 180 or 270. @param rotation 0, 90, 180 or 270 @return Rotation object

Finds a suitable EGLConfig. @param flags Bit flags from constructor. @param version Must be 2 or 3.

Compiles the provided shader source. @return A handle to the shader, or 0 on failure.

Destroys the specified surface. Note the EGLSurface won't actually be destroyed if it's still current in a context.

Loads and compiles a fragment shader, returning the OpenGL object ID.

Loads and compiles a vertex shader, returning the OpenGL object ID.

将两个byte转换为一个short