Running grafika in API <17
crearo opened this issue · 2 comments
crearo commented
I'm working on a device with API level 16, where I do not have access to android.opengl.*.
Would it be possible to rewrite the gles lib classes using javax.microedition.khronos.egl.*?
I do not need to record / encode using MediaCodec, I'd simply like to display camera preview running a couple of opengl shaders to a SurfaceView.
crearo commented
Alright, I've figured out I will need to downgrade only the EglCore and EglSurfaceBase to get the bare minimum (gles lib) to work. I'm stuck at mEgl.eglCreateWindowSurface, it keeps throwing 3008 (EGL_BAD_DISPLAY), and I'm really clueless here.
crearo commented
Alrighty! I was able to downgrade EglCore to use EGL10/11. Here's the code if anyone ever needs to use it. Please note I have not tested all Grafika activities with this change; all I needed this was to render camera frame.
/*
* Copyright 2013 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.tonbo.foxhound.client.gles;
import android.graphics.SurfaceTexture;
import android.opengl.EGL14;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceHolder;
import javax.microedition.khronos.egl.EGL10;
import javax.microedition.khronos.egl.EGL11;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.egl.EGLContext;
import javax.microedition.khronos.egl.EGLDisplay;
import javax.microedition.khronos.egl.EGLSurface;
/**
* Core EGL state (display, context, config).
* <p>
* The EGLContext must only be attached to one thread at a time. This class is not thread-safe.
*/
public final class EglCore {
private static final String TAG = EglCore.class.getSimpleName();
private EGL10 mEgl;
private EGLContext mEGLContext = EGL11.EGL_NO_CONTEXT;
private EGLDisplay mEGLDisplay = EGL11.EGL_NO_DISPLAY;
private EGLConfig mEGLConfig = null;
/**
* Prepares EGL display and context.
* <p>
*/
public EglCore() {
if (mEGLDisplay != EGL11.EGL_NO_DISPLAY) {
throw new RuntimeException("EGL already set up");
}
mEgl = (EGL10) EGLContext.getEGL();
mEGLDisplay = mEgl.eglGetDisplay(EGL11.EGL_DEFAULT_DISPLAY);
if (mEGLDisplay == EGL11.EGL_NO_DISPLAY) {
throw new RuntimeException("unable to get EGL14 display");
}
int[] version = new int[2];
if (!mEgl.eglInitialize(mEGLDisplay, version)) {
mEGLDisplay = null;
throw new RuntimeException("unable to initialize EGL11");
}
EGLConfig config = getConfig();
if (config == null) {
throw new RuntimeException("Unable to find a suitable EGLConfig");
}
/*uses gles10 by default here*/
int[] attrib2_list = {
EGL14.EGL_CONTEXT_CLIENT_VERSION, 2,
EGL11.EGL_NONE
};
EGLContext context = mEgl.eglCreateContext(mEGLDisplay, config, EGL11.EGL_NO_CONTEXT,
attrib2_list);
checkEglError("eglCreateContext");
mEGLConfig = config;
mEGLContext = context;
// Confirm with query.
int[] values = new int[1];
mEgl.eglQueryContext(mEGLDisplay, mEGLContext, EGL14.EGL_CONTEXT_CLIENT_VERSION,
values);
Log.d(TAG, "EGLContext created, client version " + values[0]);
}
/**
* Finds a suitable EGLConfig.
*/
private EGLConfig getConfig() {
int renderableType = EGL14.EGL_OPENGL_ES2_BIT;
// The actual surface is generally RGBA or RGBX, so situationally omitting alpha
// doesn't really help. It can also lead to a huge performance hit on glReadPixels()
// when reading into a GL_RGBA buffer.
int[] attribList = {
EGL11.EGL_RED_SIZE, 8,
EGL11.EGL_GREEN_SIZE, 8,
EGL11.EGL_BLUE_SIZE, 8,
EGL11.EGL_ALPHA_SIZE, 8,
//EGL14.EGL_DEPTH_SIZE, 16,
//EGL14.EGL_STENCIL_SIZE, 8,
EGL11.EGL_RENDERABLE_TYPE, renderableType,
EGL11.EGL_NONE, 0, // placeholder for recordable [@-3]
EGL11.EGL_NONE
};
/*fixme if recordable
if ((flags & FLAG_RECORDABLE) != 0) {
attribList[attribList.length - 3] = EGL_RECORDABLE_ANDROID;
attribList[attribList.length - 2] = 1;
}*/
EGLConfig[] configs = new EGLConfig[1];
int[] numConfigs = new int[1];
if (!mEgl.eglChooseConfig(mEGLDisplay, attribList, configs, configs.length,
numConfigs)) {
Log.w(TAG, "unable to find RGB8888 / EGLConfig");
return null;
}
return configs[0];
}
/**
* Writes the current display, context, and surface to the log.
*/
public void logCurrent(String msg) {
EGLDisplay display;
EGLContext context;
EGLSurface surface;
display = mEGLDisplay;
context = mEgl.eglGetCurrentContext();
surface = mEgl.eglGetCurrentSurface(EGL11.EGL_DRAW);
Log.i(TAG, "Current EGL (" + msg + "): display=" + display + ", context=" + context +
", surface=" + surface);
}
/**
* Destroys the specified surface. Note the EGLSurface won't actually be destroyed if it's
* still current in a context.
*/
public void releaseSurface(EGLSurface eglSurface) {
mEgl.eglDestroySurface(mEGLDisplay, eglSurface);
}
/**
* Creates an EGL surface associated with a Surface.
* <p>
* If this is destined for MediaCodec, the EGLConfig should have the "recordable" attribute.
*/
public EGLSurface createWindowSurface(Object surface) {
if (!(surface instanceof Surface) && !(surface instanceof SurfaceTexture) &&
!(surface instanceof SurfaceHolder)) {
throw new RuntimeException("invalid surface: " + surface);
}
// Create a window surface, and attach it to the Surface we received.
int[] surfaceAttribs = {
EGL10.EGL_NONE
};
EGLSurface eglSurface = mEgl.eglCreateWindowSurface(mEGLDisplay, mEGLConfig, surface,
surfaceAttribs);
checkEglError("eglCreateWindowSurface");
if (eglSurface == null) {
throw new RuntimeException("surface was null");
}
return eglSurface;
}
/**
* Creates an EGL surface associated with an offscreen buffer.
*/
public EGLSurface createOffscreenSurface(int width, int height) {
int[] surfaceAttribs = {
EGL11.EGL_WIDTH, width,
EGL11.EGL_HEIGHT, height,
EGL11.EGL_NONE
};
EGLSurface eglSurface = mEgl.eglCreatePbufferSurface(mEGLDisplay,
mEGLConfig, surfaceAttribs);
checkEglError("eglCreatePbufferSurface");
if (eglSurface == null) {
throw new RuntimeException("surface was null");
}
return eglSurface;
}
/**
* Makes our EGL context current, using the supplied surface for both "draw" and "read".
*/
public void makeCurrent(EGLSurface eglSurface) {
if (mEGLDisplay == EGL11.EGL_NO_DISPLAY) {
// called makeCurrent() before create?
Log.d(TAG, "NOTE: makeCurrent w/o display");
}
if (!mEgl.eglMakeCurrent(mEGLDisplay, eglSurface, eglSurface, mEGLContext)) {
throw new RuntimeException("eglMakeCurrent failed");
}
}
/**
* Makes our EGL context current, using the supplied "draw" and "read" surfaces.
*/
public void makeCurrent(EGLSurface drawSurface, EGLSurface readSurface) {
if (mEGLDisplay == EGL11.EGL_NO_DISPLAY) {
// called makeCurrent() before create?
Log.d(TAG, "NOTE: makeCurrent w/o display");
}
if (!mEgl.eglMakeCurrent(mEGLDisplay, drawSurface, readSurface, mEGLContext)) {
throw new RuntimeException("eglMakeCurrent(draw,read) failed");
}
}
/**
* Makes no context current.
*/
public void makeNothingCurrent() {
if (!mEgl.eglMakeCurrent(mEGLDisplay, EGL11.EGL_NO_SURFACE
, EGL11.EGL_NO_SURFACE, EGL11.EGL_NO_CONTEXT)) {
throw new RuntimeException("eglMakeCurrent failed");
}
}
/**
* Calls eglSwapBuffers. Use this to "publish" the current frame.
*
* @return false on failure
*/
public boolean swapBuffers(EGLSurface eglSurface) {
return mEgl.eglSwapBuffers(mEGLDisplay, eglSurface);
}
/**
* Sends the presentation time stamp to EGL. Time is expressed in nanoseconds.
*/
public void setPresentationTime(EGLSurface eglSurface, long nsecs) {
// EGLExt.eglPresentationTimeANDROID(mEGLDisplay, eglSurface, nsecs);
}
/**
* Returns true if our context and the specified surface are current.
*/
public boolean isCurrent(EGLSurface eglSurface) {
return mEGLContext.equals(mEgl.eglGetCurrentContext()) &&
eglSurface.equals(mEgl.eglGetCurrentSurface(EGL11.EGL_DRAW));
}
/**
* Performs a simple surface query.
*/
public int querySurface(EGLSurface eglSurface, int what) {
int[] value = new int[1];
mEgl.eglQuerySurface(mEGLDisplay, eglSurface, what, value);
return value[0];
}
/**
* Queries a string value.
*/
public String queryString(int what) {
return mEgl.eglQueryString(mEGLDisplay, what);
}
/**
* Returns the GLES version this context is configured for (currently 2 or 3).
*/
public int getGlVersion() {
return 2;
}
/**
* Checks for EGL errors. Throws an exception if an error has been raised.
*/
private void checkEglError(String msg) {
int error;
if ((error = mEgl.eglGetError()) != EGL10.EGL_SUCCESS) {
throw new RuntimeException(msg + ": EGL error: 0x" + Integer.toHexString(error));
}
}
}