Polygonal rendering of simple fill shapes
bug:4419017
Change-Id: If0428e1732139786cba15f54b285d880e4a56b89
diff --git a/libs/hwui/PathRenderer.h b/libs/hwui/PathRenderer.h
new file mode 100644
index 0000000..1354f16
--- /dev/null
+++ b/libs/hwui/PathRenderer.h
@@ -0,0 +1,111 @@
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_HWUI_PATH_RENDERER_H
+#define ANDROID_HWUI_PATH_RENDERER_H
+
+#include <utils/Vector.h>
+
+#include "Vertex.h"
+
+namespace android {
+namespace uirenderer {
+
+class Matrix4;
+typedef Matrix4 mat4;
+
+class VertexBuffer {
+public:
+ VertexBuffer():
+ mBuffer(0),
+ mSize(0),
+ mCleanupMethod(0)
+ {}
+
+ ~VertexBuffer()
+ {
+ if (mCleanupMethod)
+ mCleanupMethod(mBuffer);
+ }
+
+ template <class TYPE>
+ TYPE* alloc(int size)
+ {
+ mSize = size;
+ mBuffer = (void*)new TYPE[size];
+ mCleanupMethod = &(cleanup<TYPE>);
+
+ return (TYPE*)mBuffer;
+ }
+
+ void* getBuffer() { return mBuffer; }
+ unsigned int getSize() { return mSize; }
+
+private:
+ template <class TYPE>
+ static void cleanup(void* buffer)
+ {
+ delete[] (TYPE*)buffer;
+ }
+
+ void* mBuffer;
+ unsigned int mSize;
+ void (*mCleanupMethod)(void*);
+};
+
+class PathRenderer {
+public:
+ static void computeInverseScales(
+ const mat4 *transform, float &inverseScaleX, float& inverseScaleY);
+
+ static void convexPathFillVertices(
+ const SkPath &path, const mat4 *transform,
+ VertexBuffer &vertexBuffer, bool isAA);
+
+private:
+ static void convexPathVertices(
+ const SkPath &path,
+ float thresholdx, float thresholdy,
+ Vector<Vertex> &outputVertices);
+
+/*
+ endpoints a & b,
+ control c
+ */
+ static void recursiveQuadraticBezierVertices(
+ float ax, float ay,
+ float bx, float by,
+ float cx, float cy,
+ float thresholdx, float thresholdy,
+ Vector<Vertex> &outputVertices);
+
+/*
+ endpoints p1, p2
+ control c1, c2
+ */
+ static void recursiveCubicBezierVertices(
+ float p1x, float p1y,
+ float c1x, float c1y,
+ float p2x, float p2y,
+ float c2x, float c2y,
+ float thresholdx, float thresholdy,
+ Vector<Vertex> &outputVertices);
+};
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_HWUI_PATH_RENDERER_H