96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
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/*
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* Copyright 2012 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef ANDROID_HWUI_PATH_RENDERER_H
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#define ANDROID_HWUI_PATH_RENDERER_H
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#include <utils/Vector.h>
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#include "Vertex.h"
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namespace android {
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namespace uirenderer {
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class Matrix4;
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typedef Matrix4 mat4;
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class VertexBuffer {
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public:
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VertexBuffer():
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mBuffer(0),
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mSize(0),
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mCleanupMethod(0)
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{}
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~VertexBuffer() {
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if (mCleanupMethod)
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mCleanupMethod(mBuffer);
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}
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template <class TYPE>
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TYPE* alloc(int size) {
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mSize = size;
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mBuffer = (void*)new TYPE[size];
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mCleanupMethod = &(cleanup<TYPE>);
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return (TYPE*)mBuffer;
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}
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void* getBuffer() { return mBuffer; }
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unsigned int getSize() { return mSize; }
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private:
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template <class TYPE>
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static void cleanup(void* buffer) {
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delete[] (TYPE*)buffer;
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}
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void* mBuffer;
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unsigned int mSize;
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void (*mCleanupMethod)(void*);
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};
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class PathRenderer {
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public:
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static SkRect computePathBounds(const SkPath& path, const SkPaint* paint);
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static void convexPathVertices(const SkPath& path, const SkPaint* paint,
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const mat4 *transform, VertexBuffer& vertexBuffer);
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private:
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static bool convexPathPerimeterVertices(const SkPath &path, bool forceClose,
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float sqrInvScaleX, float sqrInvScaleY, Vector<Vertex> &outputVertices);
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/*
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endpoints a & b,
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control c
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*/
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static void recursiveQuadraticBezierVertices(
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float ax, float ay,
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float bx, float by,
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float cx, float cy,
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float sqrInvScaleX, float sqrInvScaleY,
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Vector<Vertex> &outputVertices);
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/*
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endpoints p1, p2
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control c1, c2
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*/
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static void recursiveCubicBezierVertices(
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float p1x, float p1y,
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float c1x, float c1y,
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float p2x, float p2y,
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float c2x, float c2y,
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float sqrInvScaleX, float sqrInvScaleY,
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Vector<Vertex> &outputVertices);
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};
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}; // namespace uirenderer
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}; // namespace android
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#endif // ANDROID_HWUI_PATH_RENDERER_H
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