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Commit a03aae8d authored by Jorge E. Moreira's avatar Jorge E. Moreira
Browse files

Check GL extension is supported before using it in glwallpaper 

glwallpaper requests a GL context with low priority, however this
feature is a GL extension that may not be available in the GL
implementation (swiftshader, for example).

Bug: 138834844
Test: run cuttlefish locally
Merged-In: I72edeb0f4dc03e51bda22209415604e752c18e52
Change-Id: I72edeb0f4dc03e51bda22209415604e752c18e52
parent 4616df8a

packages/SystemUI/src/com/android/systemui/glwallpaper/EglHelper.java

+25 −2
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ import static android.opengl.EGL14.EGL_CONFIG_CAVEAT; 
import static android.opengl.EGL14.EGL_CONTEXT_CLIENT_VERSION;

import static android.opengl.EGL14.EGL_DEFAULT_DISPLAY;

import static android.opengl.EGL14.EGL_DEPTH_SIZE;

import static android.opengl.EGL14.EGL_EXTENSIONS;

import static android.opengl.EGL14.EGL_GREEN_SIZE;

import static android.opengl.EGL14.EGL_NONE;

import static android.opengl.EGL14.EGL_NO_CONTEXT;
@@ -41,6 +42,7 @@ import static android.opengl.EGL14.eglGetDisplay; 
import static android.opengl.EGL14.eglGetError;

import static android.opengl.EGL14.eglInitialize;

import static android.opengl.EGL14.eglMakeCurrent;

import static android.opengl.EGL14.eglQueryString;

import static android.opengl.EGL14.eglSwapBuffers;

import static android.opengl.EGL14.eglTerminate;
@@ -63,6 +65,7 @@ public class EglHelper { 
    // Below two constants make drawing at low priority, so other things can preempt our drawing.

    private static final int EGL_CONTEXT_PRIORITY_LEVEL_IMG = 0x3100;

    private static final int EGL_CONTEXT_PRIORITY_LOW_IMG = 0x3103;

    private static final String EGL_IMG_CONTEXT_PRIORITY = "EGL_IMG_context_priority";



    private EGLDisplay mEglDisplay;

    private EGLConfig mEglConfig;
@@ -70,6 +73,7 @@ public class EglHelper { 
    private EGLSurface mEglSurface;

    private final int[] mEglVersion = new int[2];

    private boolean mEglReady;

    private boolean mContextPrioritySupported;



    /**

     * Initialize EGL and prepare EglSurface.
@@ -105,10 +109,22 @@ public class EglHelper { 
            return false;

        }



        mContextPrioritySupported = isContextPrioritySuppported();



        mEglReady = true;

        return true;

    }



    private boolean isContextPrioritySuppported() {

        String[] extensions = eglQueryString(mEglDisplay, EGL_EXTENSIONS).split(" ");

        for (String extension : extensions) {

            if (extension.equals(EGL_IMG_CONTEXT_PRIORITY)) {

                return true;

            }

        }

        return false;

    }



    private EGLConfig chooseEglConfig() {

        int[] configsCount = new int[1];

        EGLConfig[] configs = new EGLConfig[1];
@@ -190,8 +206,15 @@ public class EglHelper { 
     * @return true if EglContext is ready.

     */

    public boolean createEglContext() {

        int[] attrib_list = new int[] {EGL_CONTEXT_CLIENT_VERSION, 2,

                EGL_CONTEXT_PRIORITY_LEVEL_IMG, EGL_CONTEXT_PRIORITY_LOW_IMG, EGL_NONE};

        int[] attrib_list = new int[5];

        int idx = 0;

        attrib_list[idx++] = EGL_CONTEXT_CLIENT_VERSION;

        attrib_list[idx++] = 2;

        if (mContextPrioritySupported) {

            attrib_list[idx++] = EGL_CONTEXT_PRIORITY_LEVEL_IMG;

            attrib_list[idx++] = EGL_CONTEXT_PRIORITY_LOW_IMG;

        }

        attrib_list[idx++] = EGL_NONE;

        if (hasEglDisplay()) {

            mEglContext = eglCreateContext(mEglDisplay, mEglConfig, EGL_NO_CONTEXT, attrib_list, 0);

        } else {