Change way we choose EGL surfaces to be compatible with the native

window surface.

1 files changed, 166 insertions, 9 deletions

diff --git a/opengl/tests/gl2_jni/src/com/android/gl2jni/GL2JNIView.java b/opengl/tests/gl2_jni/src/com/android/gl2jni/GL2JNIView.java
index 2dae090..72b1dfb 100644
--- a/opengl/tests/gl2_jni/src/com/android/gl2jni/GL2JNIView.java
+++ b/opengl/tests/gl2_jni/src/com/android/gl2jni/GL2JNIView.java
@@ -56,19 +56,22 @@ import javax.microedition.khronos.opengles.GL10;
  */
 class GL2JNIView extends GLSurfaceView {
     private static String TAG = "GL2JNIView";
-    GL2JNIView(Context context) {
+
+    public GL2JNIView(Context context) {
         super(context);
-        init();
+        init(false, 0, 0);
     }
 
-    public GL2JNIView(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        init();
+    public GL2JNIView(Context context, boolean translucent, int depth, int stencil) {
+        super(context);
+        init(translucent, depth, stencil);
     }
 
-    private void init() {
+    private void init(boolean translucent, int depth, int stencil) {
         setEGLContextFactory(new ContextFactory());
-        setEGLConfigChooser(new ConfigChooser());
+        setEGLConfigChooser( translucent ?
+              new ConfigChooser(8,8,8,8, depth, stencil) :
+              new ConfigChooser(5,6,5,0, depth, stencil));
         setRenderer(new Renderer());
     }
 
@@ -105,6 +108,16 @@ class GL2JNIView extends GLSurfaceView {
             EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
             EGL10.EGL_NONE
         };
+
+        public ConfigChooser(int r, int g, int b, int a, int depth, int stencil) {
+            mRedSize = r;
+            mGreenSize = g;
+            mBlueSize = b;
+            mAlphaSize = a;
+            mDepthSize = depth;
+            mStencilSize = stencil;
+        }
+
         public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
 
             int[] num_config = new int[1];
@@ -112,14 +125,158 @@ class GL2JNIView extends GLSurfaceView {
 
             int numConfigs = num_config[0];
 
-            Log.w(TAG, String.format("Found %d configurations", numConfigs));
             if (numConfigs <= 0) {
                 throw new IllegalArgumentException("No configs match configSpec");
             }
             EGLConfig[] configs = new EGLConfig[numConfigs];
             egl.eglChooseConfig(display, s_configAttribs2, configs, numConfigs, num_config);
-            return configs[0];
+            // printConfigs(egl, display, configs);
+            return chooseConfig(egl, display, configs);
         }
+
+        public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display,
+                EGLConfig[] configs) {
+            EGLConfig closestConfig = null;
+            int closestDistance = 1000;
+            for(EGLConfig config : configs) {
+                int d = findConfigAttrib(egl, display, config,
+                        EGL10.EGL_DEPTH_SIZE, 0);
+                int s = findConfigAttrib(egl, display, config,
+                        EGL10.EGL_STENCIL_SIZE, 0);
+                if (d >= mDepthSize && s>= mStencilSize) {
+                    int r = findConfigAttrib(egl, display, config,
+                            EGL10.EGL_RED_SIZE, 0);
+                    int g = findConfigAttrib(egl, display, config,
+                             EGL10.EGL_GREEN_SIZE, 0);
+                    int b = findConfigAttrib(egl, display, config,
+                              EGL10.EGL_BLUE_SIZE, 0);
+                    int a = findConfigAttrib(egl, display, config,
+                            EGL10.EGL_ALPHA_SIZE, 0);
+                    int distance = Math.abs(r - mRedSize)
+                                + Math.abs(g - mGreenSize)
+                                + Math.abs(b - mBlueSize)
+                                + Math.abs(a - mAlphaSize);
+                    if (distance < closestDistance) {
+                        closestDistance = distance;
+                        closestConfig = config;
+                    }
+                }
+            }
+            return closestConfig;
+        }
+
+        private int findConfigAttrib(EGL10 egl, EGLDisplay display,
+                EGLConfig config, int attribute, int defaultValue) {
+
+            if (egl.eglGetConfigAttrib(display, config, attribute, mValue)) {
+                return mValue[0];
+            }
+            return defaultValue;
+        }
+
+        private void printConfigs(EGL10 egl, EGLDisplay display,
+            EGLConfig[] configs) {
+            int numConfigs = configs.length;
+            Log.w(TAG, String.format("%d configurations", numConfigs));
+            for (int i = 0; i < numConfigs; i++) {
+                Log.w(TAG, String.format("Configuration %d:\n", i));
+                printConfig(egl, display, configs[i]);
+            }
+        }
+
+        private void printConfig(EGL10 egl, EGLDisplay display,
+                EGLConfig config) {
+            int[] attributes = {
+                    EGL10.EGL_BUFFER_SIZE,
+                    EGL10.EGL_ALPHA_SIZE,
+                    EGL10.EGL_BLUE_SIZE,
+                    EGL10.EGL_GREEN_SIZE,
+                    EGL10.EGL_RED_SIZE,
+                    EGL10.EGL_DEPTH_SIZE,
+                    EGL10.EGL_STENCIL_SIZE,
+                    EGL10.EGL_CONFIG_CAVEAT,
+                    EGL10.EGL_CONFIG_ID,
+                    EGL10.EGL_LEVEL,
+                    EGL10.EGL_MAX_PBUFFER_HEIGHT,
+                    EGL10.EGL_MAX_PBUFFER_PIXELS,
+                    EGL10.EGL_MAX_PBUFFER_WIDTH,
+                    EGL10.EGL_NATIVE_RENDERABLE,
+                    EGL10.EGL_NATIVE_VISUAL_ID,
+                    EGL10.EGL_NATIVE_VISUAL_TYPE,
+                    0x3030, // EGL10.EGL_PRESERVED_RESOURCES,
+                    EGL10.EGL_SAMPLES,
+                    EGL10.EGL_SAMPLE_BUFFERS,
+                    EGL10.EGL_SURFACE_TYPE,
+                    EGL10.EGL_TRANSPARENT_TYPE,
+                    EGL10.EGL_TRANSPARENT_RED_VALUE,
+                    EGL10.EGL_TRANSPARENT_GREEN_VALUE,
+                    EGL10.EGL_TRANSPARENT_BLUE_VALUE,
+                    0x3039, // EGL10.EGL_BIND_TO_TEXTURE_RGB,
+                    0x303A, // EGL10.EGL_BIND_TO_TEXTURE_RGBA,
+                    0x303B, // EGL10.EGL_MIN_SWAP_INTERVAL,
+                    0x303C, // EGL10.EGL_MAX_SWAP_INTERVAL,
+                    EGL10.EGL_LUMINANCE_SIZE,
+                    EGL10.EGL_ALPHA_MASK_SIZE,
+                    EGL10.EGL_COLOR_BUFFER_TYPE,
+                    EGL10.EGL_RENDERABLE_TYPE,
+                    0x3042 // EGL10.EGL_CONFORMANT
+            };
+            String[] names = {
+                    "EGL_BUFFER_SIZE",
+                    "EGL_ALPHA_SIZE",
+                    "EGL_BLUE_SIZE",
+                    "EGL_GREEN_SIZE",
+                    "EGL_RED_SIZE",
+                    "EGL_DEPTH_SIZE",
+                    "EGL_STENCIL_SIZE",
+                    "EGL_CONFIG_CAVEAT",
+                    "EGL_CONFIG_ID",
+                    "EGL_LEVEL",
+                    "EGL_MAX_PBUFFER_HEIGHT",
+                    "EGL_MAX_PBUFFER_PIXELS",
+                    "EGL_MAX_PBUFFER_WIDTH",
+                    "EGL_NATIVE_RENDERABLE",
+                    "EGL_NATIVE_VISUAL_ID",
+                    "EGL_NATIVE_VISUAL_TYPE",
+                    "EGL_PRESERVED_RESOURCES",
+                    "EGL_SAMPLES",
+                    "EGL_SAMPLE_BUFFERS",
+                    "EGL_SURFACE_TYPE",
+                    "EGL_TRANSPARENT_TYPE",
+                    "EGL_TRANSPARENT_RED_VALUE",
+                    "EGL_TRANSPARENT_GREEN_VALUE",
+                    "EGL_TRANSPARENT_BLUE_VALUE",
+                    "EGL_BIND_TO_TEXTURE_RGB",
+                    "EGL_BIND_TO_TEXTURE_RGBA",
+                    "EGL_MIN_SWAP_INTERVAL",
+                    "EGL_MAX_SWAP_INTERVAL",
+                    "EGL_LUMINANCE_SIZE",
+                    "EGL_ALPHA_MASK_SIZE",
+                    "EGL_COLOR_BUFFER_TYPE",
+                    "EGL_RENDERABLE_TYPE",
+                    "EGL_CONFORMANT"
+            };
+            int[] value = new int[1];
+            for (int i = 0; i < attributes.length; i++) {
+                int attribute = attributes[i];
+                String name = names[i];
+                if ( egl.eglGetConfigAttrib(display, config, attribute, value)) {
+                    Log.w(TAG, String.format("  %s: %d\n", name, value[0]));
+                } else {
+                    // Log.w(TAG, String.format("  %s: failed\n", name));
+                    while (egl.eglGetError() != EGL10.EGL_SUCCESS);
+                }
+            }
+        }
+
+        // Subclasses can adjust these values:
+        protected int mRedSize;
+        protected int mGreenSize;
+        protected int mBlueSize;
+        protected int mAlphaSize;
+        protected int mDepthSize;
+        protected int mStencilSize;
+        private int[] mValue = new int[1];
     }
 
     private static class Renderer implements GLSurfaceView.Renderer {