What is EGLSurface?
The EGLSurface can be an off-screen buffer allocated by EGL, called a pbuffer, or a window allocated by the operating system. Calling the eglCreateWindowSurface() function creates EGL window surfaces. eglCreateWindowSurface() takes a window object as an argument, which on Android is a surface.
What is GL surface view?
A GLSurfaceView provides the following features: Manages a surface, which is a special piece of memory that can be composited into the Android view system. Manages an EGL display, which enables OpenGL to render into a surface. Accepts a user-provided Renderer object that does the actual rendering.
What is eglMakeCurrent?
eglMakeCurrent binds context to the current rendering thread and to the draw and read surfaces. If the calling thread has already a current rendering context of the same client API type as context , then that context is flushed and marked as no longer current.
What is EglBase Android?
public interface EglBase. Holds EGL state and utility methods for handling an egl 1.0 EGLContext, an EGLDisplay, and an EGLSurface.
What is Eglcontext?
Description. eglCreateContext creates an EGL rendering context for the current rendering API (as set with eglBindAPI ) and returns a handle to the context. The context can then be used to render into an EGL drawing surface.
What is SurfaceTexture?
android.graphics.SurfaceTexture. Captures frames from an image stream as an OpenGL ES texture. The image stream may come from either camera preview or video decode.
What is GLSurfaceView renderer?
android.opengl.GLSurfaceView.Renderer. A generic renderer interface. The renderer is responsible for making OpenGL calls to render a frame. GLSurfaceView clients typically create their own classes that implement this interface, and then call GLSurfaceView#setRenderer to register the renderer with the GLSurfaceView.
Why do you need to call glFlush ()?
Because any GL program might be executed over a network, or on an accelerator that buffers commands, all programs should call glFlush whenever they count on having all of their previously issued commands completed. For example, call glFlush before waiting for user input that depends on the generated image.
What is OpenGLRenderer?
OpenGLRenderer (libhwui) properties. This document lists all the properties that you can use to control Android’s 2D hardware accelerated rendering pipeline. Set these properties in the device.mk as PRODUCT_PROPERTY_OVERRIDES .
What is the use of Glget in OpenGL?
Returns the value or values of the specified parameter.
How do I get a surface from SurfaceTexture?
SurfaceTexture surfaceTexture = textureView. getSurfaceTexture(); Then create the Surface object from the constructor Surface(SurfaceTexture surfaceTexture) that will accept the SurfaceTexture from your TextureView object. Surface surface = new Surface(surfaceTexture);
What is Android surface?
In the context of the Android framework, Surface refers to a lower-level drawing surface whose contents are eventually displayed on the user’s screen. You can draw to it in a separate thread. To draw, start a thread, lock the SurfaceView ‘s canvas, do your drawing, and post it to the Surface .
How does eglcreatewindowsurface work?
When you call eglCreateWindowSurface (), EGL creates a new EGLSurface object and connects it to the producer interface of the window object’s BufferQueue. From that point onward, rendering to that EGLSurface results in a buffer being dequeued, rendered into, and queued for use by the consumer.
How to create EGL window surfaces on Android?
The EGLSurface can be an off-screen buffer allocated by EGL, called a pbuffer, or a window allocated by the operating system. Calling the eglCreateWindowSurface () function creates EGL window surfaces. eglCreateWindowSurface () takes a window object as an argument, which on Android is a surface. A surface is the producer side of a BufferQueue.
How do I pause and resume rendering in glsurfaceview?
A GLSurfaceView must be notified when to pause and resume rendering. GLSurfaceView clients are required to call onPause () when the activity stops and onResume () when the activity starts. These calls allow GLSurfaceView to pause and resume the rendering thread, and also allow GLSurfaceView to release and recreate the OpenGL display.
How to switch between multiple eglsurfaces?
A given thread can switch between multiple EGLSurfaces by changing what’s current. An EGLSurface must be current on only one thread at a time. EGL isn’t another aspect of a surface (like SurfaceHolder).
