【igl nanovg part-1】shell | Android OpenGLES SampleView introduce new …

…param : enableStencilBuffer (#215)

Summary:
This is a prerequisite pull request for igl nanovg(#213).

Pull Request resolved: #215

Reviewed By: dmannemela

Differential Revision: D67834361

Pulled By: corporateshark

fbshipit-source-id: 414f2fc60f56de57fb6b703a89a7cb979ab4db31

build/android/app/src/main/java/com/facebook/igl/sample/SampleActivity.java

@@ -33,6 +33,8 @@ public class SampleActivity extends Activity implements View.OnClickListener {
   private final int selectedTabColor = Color.BLUE;
   private final int unSelectedTabColor = Color.GRAY;
 
+  protected boolean mEnableStencilBuffer = false;
+
   @Override
   protected void onCreate(Bundle icicle) {
     super.onCreate(icicle);
@@ -69,7 +71,10 @@ protected void onCreate(Bundle icicle) {
       } else if (mConfigs[i].version.flavor == SampleLib.BackendFlavor.OpenGL_ES) {
         backendView =
             new SampleView(
-                getApplication(), mConfigs[i].version, mConfigs[i].swapchainColorTextureFormat);
+                getApplication(),
+                mConfigs[i].version,
+                mConfigs[i].swapchainColorTextureFormat,
+                mEnableStencilBuffer);
         ((SampleView) backendView).onPause();
       }
 

build/android/app/src/main/java/com/facebook/igl/sample/SampleView.java

@@ -29,9 +29,26 @@ public class SampleView extends GLSurfaceView {
   private float lastTouchY = 0.0f;
 
   public SampleView(
-      Context context, SampleLib.BackendVersion backendVersion, int swapchainColorTextureFormat) {
+      Context context,
+      SampleLib.BackendVersion backendVersion,
+      int swapchainColorTextureFormat,
+      boolean enableStencilBuffer) {
+    super(context);
+    init(context, backendVersion, swapchainColorTextureFormat, enableStencilBuffer);
+  }
 
+  public SampleView(
+      Context context, SampleLib.BackendVersion backendVersion, int swapchainColorTextureFormat) {
     super(context);
+    init(context, backendVersion, swapchainColorTextureFormat, false);
+  }
+
+  private void init(
+      Context context,
+      SampleLib.BackendVersion backendVersion,
+      int swapchainColorTextureFormat,
+      boolean enableStencilBuffer) {
+
     // Uncomment to attach debugging
     // android.os.Debug.waitForDebugger();
 
@@ -43,7 +60,7 @@ public SampleView(
     setEGLWindowSurfaceFactory(
         new SurfaceFactory(SampleLib.isSRGBTextureFormat(swapchainColorTextureFormat)));
 
-    setEGLConfigChooser(new ConfigChooser(backendVersion));
+    setEGLConfigChooser(new ConfigChooser(backendVersion, enableStencilBuffer));
 
     setRenderer(new Renderer(context, backendVersion, swapchainColorTextureFormat));
   }
@@ -155,8 +172,11 @@ private static class ConfigChooser implements GLSurfaceView.EGLConfigChooser {
 
     private final SampleLib.BackendVersion mBackendVersion;
 
-    public ConfigChooser(SampleLib.BackendVersion version) {
+    private boolean mEnableStencilBuffer = false;
+
+    public ConfigChooser(SampleLib.BackendVersion version, boolean enableStencilBuffer) {
       mBackendVersion = version;
+      mEnableStencilBuffer = enableStencilBuffer;
     }
 
     public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
@@ -169,6 +189,7 @@ public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
         EGL10.EGL_BLUE_SIZE, 8,
         EGL10.EGL_ALPHA_SIZE, 8,
         EGL10.EGL_DEPTH_SIZE, 16,
+        EGL10.EGL_STENCIL_SIZE, mEnableStencilBuffer ? 8 : 0,
         EGL10.EGL_RENDERABLE_TYPE,
             (mBackendVersion.majorVersion == (byte) 3)
                 ? EGL15.EGL_OPENGL_ES3_BIT

shell/android/java/com/facebook/igl/sample/SampleActivity.java

@@ -33,6 +33,8 @@ public class SampleActivity extends Activity implements View.OnClickListener {
   private final int selectedTabColor = Color.BLUE;
   private final int unSelectedTabColor = Color.GRAY;
 
+  protected boolean mEnableStencilBuffer = false;
+
   @Override
   protected void onCreate(Bundle icicle) {
     super.onCreate(icicle);
@@ -69,7 +71,10 @@ protected void onCreate(Bundle icicle) {
       } else if (mConfigs[i].version.flavor == SampleLib.BackendFlavor.OpenGL_ES) {
         backendView =
             new SampleView(
-                getApplication(), mConfigs[i].version, mConfigs[i].swapchainColorTextureFormat);
+                getApplication(),
+                mConfigs[i].version,
+                mConfigs[i].swapchainColorTextureFormat,
+                mEnableStencilBuffer);
         ((SampleView) backendView).onPause();
       }
 

shell/android/java/com/facebook/igl/sample/SampleView.java

@@ -31,9 +31,26 @@ public class SampleView extends GLSurfaceView {
   private CountDownLatch renderSessionInitLatch = new CountDownLatch(1);
 
   public SampleView(
-      Context context, SampleLib.BackendVersion backendVersion, int swapchainColorTextureFormat) {
+      Context context,
+      SampleLib.BackendVersion backendVersion,
+      int swapchainColorTextureFormat,
+      boolean enableStencilBuffer) {
+    super(context);
+    init(context, backendVersion, swapchainColorTextureFormat, enableStencilBuffer);
+  }
 
+  public SampleView(
+      Context context, SampleLib.BackendVersion backendVersion, int swapchainColorTextureFormat) {
     super(context);
+    init(context, backendVersion, swapchainColorTextureFormat, false);
+  }
+
+  private void init(
+      Context context,
+      SampleLib.BackendVersion backendVersion,
+      int swapchainColorTextureFormat,
+      boolean enableStencilBuffer) {
+
     // Uncomment to attach debugging
     // android.os.Debug.waitForDebugger();
 
@@ -45,7 +62,7 @@ public SampleView(
     setEGLWindowSurfaceFactory(
         new SurfaceFactory(SampleLib.isSRGBTextureFormat(swapchainColorTextureFormat)));
 
-    setEGLConfigChooser(new ConfigChooser(backendVersion));
+    setEGLConfigChooser(new ConfigChooser(backendVersion, enableStencilBuffer));
 
     setRenderer(
         new Renderer(context, backendVersion, swapchainColorTextureFormat, renderSessionInitLatch));
@@ -141,7 +158,6 @@ private static class SurfaceFactory implements GLSurfaceView.EGLWindowSurfaceFac
     @Override
     public EGLSurface createWindowSurface(
         EGL10 egl10, EGLDisplay eglDisplay, EGLConfig eglConfig, Object nativeWindow) {
-
       String eglExtensionString = egl10.eglQueryString(eglDisplay, egl10.EGL_EXTENSIONS);
       if (!eglExtensionString.contains("EGL_KHR_gl_colorspace")) {
         return egl10.eglCreateWindowSurface(eglDisplay, eglConfig, nativeWindow, null);
@@ -167,8 +183,11 @@ private static class ConfigChooser implements GLSurfaceView.EGLConfigChooser {
 
     private final SampleLib.BackendVersion mBackendVersion;
 
-    public ConfigChooser(SampleLib.BackendVersion version) {
+    private boolean mEnableStencilBuffer = false;
+
+    public ConfigChooser(SampleLib.BackendVersion version, boolean enableStencilBuffer) {
       mBackendVersion = version;
+      mEnableStencilBuffer = enableStencilBuffer;
     }
 
     public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
@@ -181,6 +200,7 @@ public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) {
         EGL10.EGL_BLUE_SIZE, 8,
         EGL10.EGL_ALPHA_SIZE, 8,
         EGL10.EGL_DEPTH_SIZE, 16,
+        EGL10.EGL_STENCIL_SIZE, mEnableStencilBuffer ? 8 : 0,
         EGL10.EGL_RENDERABLE_TYPE,
             (mBackendVersion.majorVersion == (byte) 3)
                 ? EGL15.EGL_OPENGL_ES3_BIT