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/*
* 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 SkRect computePathBounds(const SkPath& path, const SkPaint* paint);
static void convexPathVertices(const SkPath& path, const SkPaint* paint,
const mat4 *transform, VertexBuffer& vertexBuffer);
private:
static void convexPathPerimeterVertices(
const SkPath &path,
float sqrInvScaleX, float sqrInvScaleY,
Vector<Vertex> &outputVertices);
/*
endpoints a & b,
control c
*/
static void recursiveQuadraticBezierVertices(
float ax, float ay,
float bx, float by,
float cx, float cy,
float sqrInvScaleX, float sqrInvScaleY,
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 sqrInvScaleX, float sqrInvScaleY,
Vector<Vertex> &outputVertices);
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_PATH_RENDERER_H
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