Fix b/5392171 and b/5389281.

1. Fix b/5392171 by moving effect context creation into Filter to make
sure it'd be created when needed.
2. Revise the fix for b/5389281 by clearing surface background even
there's no photo.

Change-Id: I212a552291c7df28b75a909bf6560634ba061e9f

1 files changed, 5 insertions, 2 deletions

diff --git a/src/com/android/gallery3d/photoeditor/RendererUtils.java b/src/com/android/gallery3d/photoeditor/RendererUtils.java
index a0cd5982d..ff593d4ef 100644
--- a/src/com/android/gallery3d/photoeditor/RendererUtils.java
+++ b/src/com/android/gallery3d/photoeditor/RendererUtils.java
@@ -174,6 +174,11 @@ public class RendererUtils {
         context.posVertices = createVerticesBuffer(vertices);
     }
 
+    public static void renderBackground() {
+        GLES20.glClearColor(0, 0, 0, 1);
+        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
+    }
+
     public static void renderTexture(
             RenderContext context, int texture, int viewWidth, int viewHeight) {
         // Use our shader program
@@ -204,8 +209,6 @@ public class RendererUtils {
         GLES20.glUniform1i(context.texSamplerHandle, 0);
 
         // Draw!
-        GLES20.glClearColor(0, 0, 0, 1);
-        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
         GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
     }