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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkVertices_DEFINED
#define SkVertices_DEFINED
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkData.h"
#include "SkPoint.h"
#include "SkRect.h"
#include "SkRefCnt.h"
/**
* An immutable set of vertex data that can be used with SkCanvas::drawVertices. Clients are
* encouraged to provide a bounds on the vertex positions if they can compute one more cheaply than
* looping over the positions.
*/
class SkVertices : public SkNVRefCnt<SkVertices> {
public:
~SkVertices() { sk_free((void*)fPositions); }
/**
* Create a vertices by copying the specified arrays. texs and colors may be nullptr,
* and indices is ignored if indexCount == 0.
*/
static sk_sp<SkVertices> MakeCopy(SkCanvas::VertexMode mode, int vertexCount,
const SkPoint positions[],
const SkPoint texs[],
const SkColor colors[],
int indexCount,
const uint16_t indices[]);
static sk_sp<SkVertices> MakeCopy(SkCanvas::VertexMode mode, int vertexCount,
const SkPoint positions[],
const SkPoint texs[],
const SkColor colors[]) {
return MakeCopy(mode, vertexCount, positions, texs, colors, 0, nullptr);
}
enum Flags {
kHasTexs_Flag = 1 << 0,
kHasColors_Flag = 1 << 1,
};
class Builder {
public:
Builder(SkCanvas::VertexMode mode, int vertexCount, int indexCount, uint32_t flags);
~Builder();
bool isValid() const { return fPositions != nullptr; }
int vertexCount() const { return fVertexCnt; }
int indexCount() const { return fIndexCnt; }
SkPoint* positions() { return fPositions; }
SkPoint* texCoords() { return fTexs; }
SkColor* colors() { return fColors; }
uint16_t* indices() { return fIndices; }
sk_sp<SkVertices> detach();
private:
SkPoint* fPositions; // owner of storage, use sk_free
SkPoint* fTexs;
SkColor* fColors;
uint16_t* fIndices;
int fVertexCnt;
int fIndexCnt;
SkCanvas::VertexMode fMode;
};
SkCanvas::VertexMode mode() const { return fMode; }
uint32_t uniqueID() const { return fUniqueID; }
int vertexCount() const { return fVertexCnt; }
bool hasColors() const { return SkToBool(fColors); }
bool hasTexCoords() const { return SkToBool(fTexs); }
const SkPoint* positions() const { return fPositions; }
const SkPoint* texCoords() const { return fTexs; }
const SkColor* colors() const { return fColors; }
bool isIndexed() const { return SkToBool(fIndexCnt); }
int indexCount() const { return fIndexCnt; }
const uint16_t* indices() const { return fIndices; }
size_t size() const {
return fVertexCnt * (sizeof(SkPoint) * (this->hasTexCoords() ? 2 : 1) + sizeof(SkColor)) +
fIndexCnt * sizeof(uint16_t);
}
const SkRect& bounds() const { return fBounds; }
static sk_sp<SkVertices> Decode(const void*, size_t);
sk_sp<SkData> encode() const;
private:
SkVertices() {}
const SkPoint* fPositions; // owner of storage, use sk_free
const SkPoint* fTexs;
const SkColor* fColors;
const uint16_t* fIndices;
SkRect fBounds;
uint32_t fUniqueID;
int fVertexCnt;
int fIndexCnt;
SkCanvas::VertexMode fMode;
};
#endif
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