您正在尝试在Android上使用不起作用的EGL选项,而pbuffers仅适用于某些GPU - 不适用于Nvidia Tegra。无论是在屏幕上还是离屏,pi32ConfigAttribs[]
应该像这样:
EGLint pi32ConfigAttribs[] =
{
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, 0,
EGL_STENCIL_SIZE, 0,
EGL_NONE
};
安卓在支持离屏EGLSurface方面非常不灵活,他们定义了自己的名为EGL_NATIVE_BUFFER_ANDROID
的像素图类型。
要在安卓上创建离屏EGLSurface,构建一个SurfaceTexture
,并将其传递给eglCreateWindowSurface()
。您还应该查看使用EGL Image扩展和EGL_NATIVE_BUFFER_ANDROID
,如此处所讨论的那样:
http://software.intel.com/en-us/articles/using-opengl-es-to-accelerate-apps-with-legacy-2d-guis
http://software.intel.com/en-us/articles/porting-opengl-games-to-android-on-intel-atom-processors-part-1
更新:
以下是一些示例代码,可创建离屏表面:
private EGL10 mEgl;
private EGLConfig[] maEGLconfigs;
private EGLDisplay mEglDisplay = null;
private EGLContext mEglContext = null;
private EGLSurface mEglSurface = null;
private EGLSurface[] maEglSurfaces = new EGLSurface[MAX_SURFACES];
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height)
{
InitializeEGL();
CreateSurfaceEGL(surfaceTexture, width, height);
}
private void InitializeEGL()
{
mEgl = (EGL10)EGLContext.getEGL();
mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
if (mEglDisplay == EGL10.EGL_NO_DISPLAY)
throw new RuntimeException("Error: eglGetDisplay() Failed " + GLUtils.getEGLErrorString(mEgl.eglGetError()));
int[] version = new int[2];
if (!mEgl.eglInitialize(mEglDisplay, version))
throw new RuntimeException("Error: eglInitialize() Failed " + GLUtils.getEGLErrorString(mEgl.eglGetError()));
maEGLconfigs = new EGLConfig[1];
int[] configsCount = new int[1];
int[] configSpec = new int[]
{
EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL10.EGL_RED_SIZE, 8,
EGL10.EGL_GREEN_SIZE, 8,
EGL10.EGL_BLUE_SIZE, 8,
EGL10.EGL_ALPHA_SIZE, 8,
EGL10.EGL_DEPTH_SIZE, 0,
EGL10.EGL_STENCIL_SIZE, 0,
EGL10.EGL_NONE
};
if ((!mEgl.eglChooseConfig(mEglDisplay, configSpec, maEGLconfigs, 1, configsCount)) || (configsCount[0] == 0))
throw new IllegalArgumentException("Error: eglChooseConfig() Failed " + GLUtils.getEGLErrorString(mEgl.eglGetError()));
if (maEGLconfigs[0] == null)
throw new RuntimeException("Error: eglConfig() not Initialized");
int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
mEglContext = mEgl.eglCreateContext(mEglDisplay, maEGLconfigs[0], EGL10.EGL_NO_CONTEXT, attrib_list);
}
private void CreateSurfaceEGL(SurfaceTexture surfaceTexture, int width, int height)
{
surfaceTexture.setDefaultBufferSize(width, height);
mEglSurface = mEgl.eglCreateWindowSurface(mEglDisplay, maEGLconfigs[0], surfaceTexture, null);
if (mEglSurface == null || mEglSurface == EGL10.EGL_NO_SURFACE)
{
int error = mEgl.eglGetError();
if (error == EGL10.EGL_BAD_NATIVE_WINDOW)
{
Log.e(LOG_TAG, "Error: createWindowSurface() Returned EGL_BAD_NATIVE_WINDOW.");
return;
}
throw new RuntimeException("Error: createWindowSurface() Failed " + GLUtils.getEGLErrorString(error));
}
if (!mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext))
throw new RuntimeException("Error: eglMakeCurrent() Failed " + GLUtils.getEGLErrorString(mEgl.eglGetError()));
int[] widthResult = new int[1];
int[] heightResult = new int[1];
mEgl.eglQuerySurface(mEglDisplay, mEglSurface, EGL10.EGL_WIDTH, widthResult);
mEgl.eglQuerySurface(mEglDisplay, mEglSurface, EGL10.EGL_HEIGHT, heightResult);
Log.i(LOG_TAG, "EGL Surface Dimensions:" + widthResult[0] + " " + heightResult[0]);
}
private void DeleteSurfaceEGL(EGLSurface eglSurface)
{
if (eglSurface != EGL10.EGL_NO_SURFACE)
mEgl.eglDestroySurface(mEglDisplay, eglSurface);
}