Improve gradients

Avoid using textures for common gradients (two stops from 0.0 to 1.0)

Change-Id: Iff55d21b126c8cfc4cfb701669f2339c8f6b131a

2 files changed, 125 insertions, 0 deletions

diff --git a/tests/HwAccelerationTest/AndroidManifest.xml b/tests/HwAccelerationTest/AndroidManifest.xml
index e7247a3..fad5993 100644
--- a/tests/HwAccelerationTest/AndroidManifest.xml
+++ b/tests/HwAccelerationTest/AndroidManifest.xml
@@ -33,6 +33,15 @@
         <meta-data android:name="android.graphics.renderThread" android:value="true" />
 
         <activity
+                android:name="GradientStopsActivity"
+                android:label="_GradientStops">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity
                 android:name="PaintDrawFilterActivity"
                 android:label="_DrawFilter">
             <intent-filter>
diff --git a/tests/HwAccelerationTest/src/com/android/test/hwui/GradientStopsActivity.java b/tests/HwAccelerationTest/src/com/android/test/hwui/GradientStopsActivity.java
new file mode 100644
index 0000000..ed00ecd
--- /dev/null
+++ b/tests/HwAccelerationTest/src/com/android/test/hwui/GradientStopsActivity.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.test.hwui;
+
+import android.app.Activity;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.LinearGradient;
+import android.graphics.Paint;
+import android.graphics.Shader;
+import android.os.Bundle;
+import android.view.View;
+
+@SuppressWarnings("UnusedDeclaration")
+public class GradientStopsActivity extends Activity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        
+        setContentView(new GradientView(this));
+    }
+
+    private class GradientView extends View {
+        public GradientView(Context context) {
+            super(context);
+        }
+
+        @Override
+        protected void onDraw(Canvas canvas) {
+            int[] colors = new int[] { 0xffff0000, 0xff0000ff };
+            float[] positions = new float[] { 0.3f, 0.6f };
+            LinearGradient gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
+                    colors, positions, Shader.TileMode.CLAMP);
+            
+            Paint paint = new Paint();
+            paint.setShader(gradient);
+
+            canvas.drawRect(0.0f, 0.0f, 256.0f, 50.0f, paint);
+
+            colors = new int[] { 0xffff0000, 0xff0000ff, 0xff00ff00 };
+            positions = new float[] { 0.3f, 0.6f, 1.0f };
+            gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
+                    colors, positions, Shader.TileMode.CLAMP);
+
+            paint.setShader(gradient);
+
+            canvas.translate(0.0f, 75.0f);
+            canvas.drawRect(0.0f, 0.0f, 256.0f, 50.0f, paint);
+
+            colors = new int[] { 0xffff0000, 0xff0000ff, 0xff00ff00 };
+            positions = new float[] { 0.0f, 0.3f, 0.6f };
+            gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
+                    colors, positions, Shader.TileMode.CLAMP);
+
+            paint.setShader(gradient);
+
+            canvas.translate(0.0f, 75.0f);
+            canvas.drawRect(0.0f, 0.0f, 256.0f, 50.0f, paint);
+
+            colors = new int[] { 0xff000000, 0xffffffff };
+            gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
+                    colors, null, Shader.TileMode.CLAMP);
+
+            paint.setShader(gradient);
+
+            canvas.translate(0.0f, 75.0f);
+            canvas.drawRect(0.0f, 0.0f, 256.0f, 50.0f, paint);
+
+            gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
+                    colors, null, Shader.TileMode.REPEAT);
+            
+            paint.setShader(gradient);
+
+            canvas.translate(0.0f, 75.0f);
+            canvas.drawRect(0.0f, 0.0f, 768.0f, 50.0f, paint);
+
+            gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
+                    colors, null, Shader.TileMode.MIRROR);
+
+            paint.setShader(gradient);
+
+            canvas.translate(0.0f, 75.0f);
+            canvas.drawRect(0.0f, 0.0f, 768.0f, 50.0f, paint);
+
+            gradient = new LinearGradient(0.0f, 0.0f, 256.0f, 0.0f,
+                    colors, null, Shader.TileMode.CLAMP);
+
+            paint.setShader(gradient);
+
+            canvas.translate(0.0f, 75.0f);
+            canvas.drawRect(0.0f, 0.0f, 768.0f, 50.0f, paint);
+
+            gradient = new LinearGradient(0.0f, 0.0f, 768.0f, 0.0f,
+                    colors, null, Shader.TileMode.CLAMP);
+
+            paint.setShader(gradient);
+
+            canvas.translate(0.0f, 75.0f);
+            canvas.drawRect(0.0f, 0.0f, 768.0f, 50.0f, paint);
+        }
+    }
+}