Checks to see if a GLES error has been raised.

Checks to see if the location we obtained is valid. GLES returns -1 if a label could not be found, but does not set the GL error. <p> Throws a Runtim

Allocates a direct float buffer, and populates it with the float array data.

Creates a new program from the supplied vertex and fragment shaders. @return A handle to the program, or 0 on failure.

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

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

Returns the number of position coordinates per vertex. This will be 2 or 3.

Returns the array of vertices. <p> To avoid allocations, this returns internal state. The caller must not modify it.

Returns the number of vertices stored in the vertex array.

Returns the width, in bytes, of the data for each vertex.

Makes our EGL context current, using the supplied surface for both "draw" and "read".

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

Returns the model-view matrix. <p> To avoid allocations, this returns internal state. The caller must not modify it.

Returns the array of texture coordinates. <p> To avoid allocations, this returns internal state. The caller must not modify it.

Returns the width, in bytes, of the data for each texture coordinate.

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

Performs a simple surface query.

Release the EGL surface.

Creates a texture from raw data. @param data Image data, in a "direct" ByteBuffer. @param width Texture width, in pixels (not bytes). @param height T

Creates an EGL surface associated with an offscreen buffer.

Creates a texture object suitable for use with drawFrame().

Draws the rectangle with the supplied program and projection matrix.

Draws a viewport-filling rect, texturing it with the specified texture object.

Generates a "coarse" test image. We want to create a 4x4 block pattern with obvious color values in the corners, so that we can confirm orientation a

Generates a fine-grained test image. @return A direct ByteBuffer with the 8888 RGBA data.

Returns the surface's height, in pixels.

Returns the surface's width, in pixels. <p> If this is called on a window surface, and the underlying surface is in the process of changing size, we m

Returns true if our context and the specified surface are current.

Makes our EGL context and surface current.

Re-computes mModelViewMatrix, based on the current values for rotation, scale, and translation.

Releases resources. <p> This must be called with the appropriate EGL context current (i.e. the one that was current when the constructor was called).

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

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

Configures the convolution filter values. @param values Normalized filter values; must be KERNEL_SIZE elements.

Sets the size of the texture. This is used to find adjacent texels when filtering.

Calls eglSwapBuffers. Use this to "publish" the current frame. @return false on failure

Prepares a drawable from a "pre-fabricated" shape definition. <p> Does no EGL/GL operations, so this can be done at any time.

Prepares EGL display and context. <p> Equivalent to EglCore(null, 0).

Prepares the program in the current EGL context.

Prepares the object. @param program The program to use. FullFrameRect takes ownership, and will release the program when no longer needed.

Creates an off-screen surface with the specified width and height.

Prepares the program in the current EGL context.

Associates an EGL surface with the native window surface. <p> Set releaseSurface to true if you want the Surface to be released when release() is call