How to use GraphicBuffer in android ndk
android, android-ndk, egl, opengl-es
Solution
I am working on this problem these days, too.
Many blogs said a copy of Android source code is needed to link along with your project. I believe it's more elegant to get function from `libui.so` in runtime, which is the "alternative approach" mentioned by Aleksandar Stojiljkovic.
I have written a simple library to do that. Here is it.
Problem
I am asking this with reference to an answer for my question at How to improve opengl es display performance in android . I was trying to build the code which uses GraphicBuffer with ndk-r9d. but It is saying GraphicBuffer is not declared in this scope. The same comments for eglCreateImageKHR and glEGLImageTargetTexture2DOES. I have added EGL/eglext.h and GLES2/gl2ext.h . I tried to include ui/GraphicBuffer.h but it is not taking it. Is there another header file to be added ? The code given below I have added to avoid use of glTexSubImage2D(). ``` GraphicBuffer * pGraphicBuffer = new GraphicBuffer(frame_width, frame_height, PIXEL_FORMAT_RGB_565, GraphicBuffer::USAGE_SW_WRITE_OFTEN | GraphicBuffer::USAGE_HW_TEXTURE); // Lock the buffer to get a pointer unsigned char * pBitmap = NULL; pGraphicBuffer->lock(GraphicBuffer::USAGE_SW_WRITE_OFTEN,(void **)&pBitmap); // Write 2D image to pBitmap memcpy(pBitmap, frame_buffer, frame_width * frame_height * 3); // Unlock to allow OpenGL ES to use it pGraphicBuffer->unlock(); EGLClientBuffer ClientBufferAddress = pGraphicBuffer->getNativeBuffer(); EGLint SurfaceType = EGL_NATIVE_BUFFER_ANDROID; // Make an EGL Image at the same address of the native client buffer EGLDisplay eglDisplayHandle = eglGetDisplay(EGL_DEFAULT_DISPLAY); // Create an EGL Image with these attributes EGLint eglImageAttributes[] = {EGL_WIDTH, frame_width, EGL_HEIGHT, frame_height, EGL_MATCH_FORMAT_KHR, EGL_FORMAT_RGB_565_KHR, EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE}; EGLImageKHR eglImageHandle = eglCreateImageKHR(eglDisplayHandle, EGL_NO_CONTEXT, SurfaceType, ClientBufferAddress, eglImageAttributes); // Create a texture and bind it to GL_TEXTURE_2D /* EGLint TextureHandle; glGenTextures(1, &TextureHandle); glBindTexture(GL_TEXTURE_2D, TextureHandle); */ // Attach the EGL Image to the same texture glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, eglImageHandle); ``` What can I do to get it run...... Thanks in advance..