New, better line drawing implementation.

Bug #3207544
Bug #3225875

Change-Id: Ibdd1dfc64e01625d5c441f39eb0aa3ee647f6ff5

1 files changed, 119 insertions, 0 deletions

diff --git a/libs/hwui/Vector.h b/libs/hwui/Vector.h
new file mode 100644
index 0000000..46dded5
--- /dev/null
+++ b/libs/hwui/Vector.h
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#ifndef ANDROID_HWUI_VECTOR_H
+#define ANDROID_HWUI_VECTOR_H
+
+namespace android {
+namespace uirenderer {
+
+///////////////////////////////////////////////////////////////////////////////
+// Classes
+///////////////////////////////////////////////////////////////////////////////
+
+struct Vector2 {
+    float x;
+    float y;
+
+    Vector2() :
+        x(0.0f), y(0.0f) {
+    }
+
+    Vector2(float px, float py) :
+        x(px), y(py) {
+    }
+
+    float length() const {
+        return sqrt(x * x + y * y);
+    }
+
+    void operator+=(const Vector2& v) {
+        x += v.x;
+        y += v.y;
+    }
+
+    void operator-=(const Vector2& v) {
+        x -= v.x;
+        y -= v.y;
+    }
+
+    void operator+=(const float v) {
+        x += v;
+        y += v;
+    }
+
+    void operator-=(const float v) {
+        x -= v;
+        y -= v;
+    }
+
+    void operator/=(float s) {
+        x /= s;
+        y /= s;
+    }
+
+    void operator*=(float s) {
+        x *= s;
+        y *= s;
+    }
+
+    Vector2 operator+(const Vector2& v) const {
+        return Vector2(x + v.x, y + v.y);
+    }
+
+    Vector2 operator-(const Vector2& v) const {
+        return Vector2(x - v.x, y - v.y);
+    }
+
+    Vector2 operator/(float s) const {
+        return Vector2(x / s, y / s);
+    }
+
+    Vector2 operator*(float s) const {
+        return Vector2(x * s, y * s);
+    }
+
+    void normalize() {
+        float s = 1.0f / length();
+        x *= s;
+        y *= s;
+    }
+
+    Vector2 copyNormalized() const {
+        Vector2 v(x, y);
+        v.normalize();
+        return v;
+    }
+
+    float dot(const Vector2& v) const {
+        return x * v.x + y * v.y;
+    }
+
+    void dump() {
+        LOGD("Vector2[%.2f, %.2f]", x, y);
+    }
+}; // class Vector2
+
+///////////////////////////////////////////////////////////////////////////////
+// Types
+///////////////////////////////////////////////////////////////////////////////
+
+typedef Vector2 vec2;
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_HWUI_VECTOR_H