Fix horizontal and vertical panning.

Change-Id: I5177f3f3424233371136bdcbf358ce7056ea055d

4 files changed, 16 insertions, 8 deletions

diff --git a/src/com/android/magicsmoke/MagicSmokeRS.java b/src/com/android/magicsmoke/MagicSmokeRS.java
index 6b0e8ff..201aacd 100644
--- a/src/com/android/magicsmoke/MagicSmokeRS.java
+++ b/src/com/android/magicsmoke/MagicSmokeRS.java
@@ -44,6 +44,7 @@ class MagicSmokeRS extends RenderScriptScene implements OnSharedPreferenceChange
 
     static class WorldState {
         public float mXOffset;
+        public float mYOffset;
         public int   mPreset;
         public int   mTextureMask;
         public int   mRotate;
@@ -226,10 +227,12 @@ class MagicSmokeRS extends RenderScriptScene implements OnSharedPreferenceChange
     }*/
 
     @Override
-    public void setOffset(float xOffset, float yOffset, int xPixels, int yPixels) {
+    public void setOffset(float xOffset, float yOffset, float xStep, float yStep, int xPixels, int yPixels) {
         // update our state, then push it to the renderscript
         mWorldState.mXOffset = xOffset;
+        mWorldState.mYOffset = yOffset;
         mScript.set_gXOffset(mWorldState.mXOffset);
+        mScript.set_gYOffset(mWorldState.mYOffset);
     }
 
     @Override
diff --git a/src/com/android/magicsmoke/RenderScriptScene.java b/src/com/android/magicsmoke/RenderScriptScene.java
index 9f3859e..fdf4935 100644
--- a/src/com/android/magicsmoke/RenderScriptScene.java
+++ b/src/com/android/magicsmoke/RenderScriptScene.java
@@ -83,7 +83,7 @@ public abstract class RenderScriptScene {
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
-    public void setOffset(float xOffset, float yOffset, int xPixels, int yPixels) {
+    public void setOffset(float xOffset, float yOffset, float xStep, float yStep, int xPixels, int yPixels) {
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
diff --git a/src/com/android/magicsmoke/RenderScriptWallpaper.java b/src/com/android/magicsmoke/RenderScriptWallpaper.java
index 28c68af..c9bbdd9 100644
--- a/src/com/android/magicsmoke/RenderScriptWallpaper.java
+++ b/src/com/android/magicsmoke/RenderScriptWallpaper.java
@@ -93,7 +93,7 @@ public abstract class RenderScriptWallpaper<T extends RenderScriptScene> extends
         @Override
         public void onOffsetsChanged(float xOffset, float yOffset,
                 float xStep, float yStep, int xPixels, int yPixels) {
-            mRenderer.setOffset(xOffset, yOffset, xPixels, yPixels);
+            mRenderer.setOffset(xOffset, yOffset, xStep, yStep, xPixels, yPixels);
         }
 
         @Override
diff --git a/src/com/android/magicsmoke/clouds.rs b/src/com/android/magicsmoke/clouds.rs
index cc81e57..b0d55bf 100644
--- a/src/com/android/magicsmoke/clouds.rs
+++ b/src/com/android/magicsmoke/clouds.rs
@@ -31,6 +31,7 @@
 
 // State set from java
 float gXOffset;
+float gYOffset;
 int   gPreset;
 int   gTextureMask;
 int   gRotate;
@@ -48,6 +49,7 @@ typedef struct VertexShaderConstants_s {
     float4 layer2;
     float4 layer3;
     float4 layer4;
+    float2 panoffset;
 } VertexShaderConstants;
 VertexShaderConstants *gVSConstants;
 
@@ -136,11 +138,11 @@ static void update()
     rotate(gVSConstants->layer3, rotation[3]);
     rotate(gVSConstants->layer4, rotation[4]);
 
-    gVSConstants->layer0.w = -gXOffset *  0 + xshift[0];
-    gVSConstants->layer1.w = -gXOffset *  8 + xshift[1];
-    gVSConstants->layer2.w = -gXOffset * 16 + xshift[2];
-    gVSConstants->layer3.w = -gXOffset * 24 + xshift[3];
-    gVSConstants->layer4.w = -gXOffset * 32 + xshift[4];
+    gVSConstants->layer0.w = xshift[0];
+    gVSConstants->layer1.w = xshift[1];
+    gVSConstants->layer2.w = xshift[2];
+    gVSConstants->layer3.w = xshift[3];
+    gVSConstants->layer4.w = xshift[4];
 
     float m = 0.35f;
     gVSConstants->layer0.z = m * scale[0];
@@ -149,6 +151,9 @@ static void update()
     gVSConstants->layer3.z = m * scale[3];
     gVSConstants->layer4.z = m * scale[4];
 
+    gVSConstants->panoffset.x = gXOffset;
+    gVSConstants->panoffset.y = -gYOffset;
+
     gFSConstants->clearColor = clearColor;
 
     int pos = 0;