Fix LightCycle capture NullPointerException.

 Bug 7987002
 During capture animation, allow LightCycle to write the
 current frame to a texture, then use that texture for drawing
 the background image.

Change-Id: I7891e5cac18ee21ff17910790397459f9d57e408

3 files changed, 23 insertions, 0 deletions

diff --git a/src/com/android/gallery3d/glrenderer/BasicTexture.java b/src/com/android/gallery3d/glrenderer/BasicTexture.java
index 48227f6ef..82eb5a7ee 100644
--- a/src/com/android/gallery3d/glrenderer/BasicTexture.java
+++ b/src/com/android/gallery3d/glrenderer/BasicTexture.java
@@ -86,6 +86,10 @@ public abstract class BasicTexture implements Texture {
         }
     }
 
+    public boolean isFlippedVertically() {
+      return false;
+    }
+
     public int getId() {
         return mId;
     }
diff --git a/src/com/android/gallery3d/glrenderer/GLES20Canvas.java b/src/com/android/gallery3d/glrenderer/GLES20Canvas.java
index 149b21efd..28b72ec3b 100644
--- a/src/com/android/gallery3d/glrenderer/GLES20Canvas.java
+++ b/src/com/android/gallery3d/glrenderer/GLES20Canvas.java
@@ -669,8 +669,17 @@ public class GLES20Canvas implements GLCanvas {
         setPosition(params, OFFSET_FILL_RECT);
         GLES20.glUniformMatrix4fv(params[INDEX_TEXTURE_MATRIX].handle, 1, false, textureMatrix, 0);
         checkError();
+        if (texture.isFlippedVertically()) {
+            save(SAVE_FLAG_MATRIX);
+            translate(0, target.centerY());
+            scale(1, -1, 1);
+            translate(0, -target.centerY());
+        }
         draw(params, GLES20.GL_TRIANGLE_STRIP, COUNT_FILL_VERTEX, target.left, target.top,
                 target.width(), target.height());
+        if (texture.isFlippedVertically()) {
+            restore();
+        }
         mCountTextureRect++;
     }
 
diff --git a/src/com/android/gallery3d/glrenderer/RawTexture.java b/src/com/android/gallery3d/glrenderer/RawTexture.java
index 74538995b..93f0fdff9 100644
--- a/src/com/android/gallery3d/glrenderer/RawTexture.java
+++ b/src/com/android/gallery3d/glrenderer/RawTexture.java
@@ -24,6 +24,7 @@ public class RawTexture extends BasicTexture {
     private static final String TAG = "RawTexture";
 
     private final boolean mOpaque;
+    private boolean mIsFlipped;
 
     public RawTexture(int width, int height, boolean opaque) {
         mOpaque = opaque;
@@ -35,6 +36,15 @@ public class RawTexture extends BasicTexture {
         return mOpaque;
     }
 
+    @Override
+    public boolean isFlippedVertically() {
+        return mIsFlipped;
+    }
+
+    public void setIsFlippedVertically(boolean isFlipped) {
+        mIsFlipped = isFlipped;
+    }
+
     protected void prepare(GLCanvas canvas) {
         GLId glId = canvas.getGLId();
         mId = glId.generateTexture();