/**
* Discard all resources held by this class, notably the EGL context.
*/
public void Release()
{
if (mEGL != null)
{
if (mEGL.EglGetCurrentContext().Equals(mEGLContext))
{
// Clear the current context and surface to ensure they are discarded immediately.
mEGL.EglMakeCurrent(mEGLDisplay, EGL10.EglNoSurface, EGL10.EglNoSurface,
EGL10.EglNoContext);
}
mEGL.EglDestroySurface(mEGLDisplay, mEGLSurface);
mEGL.EglDestroyContext(mEGLDisplay, mEGLContext);
//mEGL.eglTerminate(mEGLDisplay);
}
_surface.Release();
// this causes a bunch of warnings that appear harmless but might confuse someone:
// W BufferQueue: [unnamed-3997-2] cancelBuffer: BufferQueue has been abandoned!
//mSurfaceTexture.release();
// null everything out so future attempts to use this object will cause an NPE
mEGLDisplay = null;
mEGLContext = null;
mEGLSurface = null;
mEGL = null;
_textureRender = null;
_surface = null;
_surfaceTexture = null;
}
/**
* Prepares EGL. We want a GLES 2.0 context and a surface that supports pbuffer.
*/
private void eglSetup(int width, int height)
{
mEGL = (IEGL10)EGLContext.EGL;
mEGLDisplay = mEGL.EglGetDisplay(EGL10.EglDefaultDisplay);
if (!mEGL.EglInitialize(mEGLDisplay, null))
{
throw new RuntimeException("unable to initialize EGL10");
}
// Configure EGL for pbuffer and OpenGL ES 2.0. We want enough RGB bits
// to be able to tell if the frame is reasonable.
int[] attribList =
{
EGL10.EglRedSize, 16,
EGL10.EglGreenSize, 16,
EGL10.EglBlueSize, 16,
EGL10.EglAlphaSize, 16,
EGL10.EglSurfaceType, EGL10.EglPbufferBit,
EGL10.EglRenderableType, EGL_OPENGL_ES2_BIT,
EGL10.EglNone
};
EGLConfig[] configs = new EGLConfig[1];
int[] numConfigs = new int[1];
if (!mEGL.EglChooseConfig(mEGLDisplay, attribList, configs, 1, numConfigs))
{
throw new RuntimeException("unable to find RGB888+pbuffer EGL config");
}
// Configure context for OpenGL ES 2.0.
int[] attrib_list =
{
EGL14.EglContextClientVersion, 2,
EGL10.EglNone
};
mEGLContext = mEGL.EglCreateContext(mEGLDisplay, configs[0], EGL10.EglNoContext,
attrib_list);
CheckEglError("eglCreateContext");
if (mEGLContext == null)
{
throw new RuntimeException("null context");
}
// Create a pbuffer surface. By using this for output, we can use glReadPixels
// to test values in the output.
int[] surfaceAttribs =
{
EGL10.EglWidth, width,
EGL10.EglHeight, height,
EGL10.EglNone
};
mEGLSurface = mEGL.EglCreatePbufferSurface(mEGLDisplay, configs[0], surfaceAttribs);
CheckEglError("eglCreatePbufferSurface");
if (mEGLSurface == null)
{
throw new RuntimeException("surface was null");
}
}
