skia2/include/core/SkLights.h
robertphillips a746f7894a Fix dtor bug in SkLights
The overriding problem was that the SkTDArray wasn't calling the SkLight destructors.

TBR=reed@google.com

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2206823003

Review-Url: https://codereview.chromium.org/2206823003
2016-08-03 09:40:39 -07:00

135 lines
3.2 KiB
C++

/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkLights_DEFINED
#define SkLights_DEFINED
#include "SkPoint3.h"
#include "SkRefCnt.h"
#include "../private/SkTArray.h"
#include "SkImage.h"
class SK_API SkLights : public SkRefCnt {
public:
class Light {
public:
enum LightType {
kAmbient_LightType, // only 'fColor' is used
kDirectional_LightType
};
Light(const Light& other)
: fType(other.fType)
, fColor(other.fColor)
, fDirection(other.fDirection)
, fShadowMap(other.fShadowMap) {
}
Light(Light&& other)
: fType(other.fType)
, fColor(other.fColor)
, fDirection(other.fDirection)
, fShadowMap(std::move(other.fShadowMap)) {
}
Light(const SkColor3f& color)
: fType(kAmbient_LightType)
, fColor(color) {
fDirection.set(0.0f, 0.0f, 1.0f);
}
Light(const SkColor3f& color, const SkVector3& dir)
: fType(kDirectional_LightType)
, fColor(color)
, fDirection(dir) {
if (!fDirection.normalize()) {
fDirection.set(0.0f, 0.0f, 1.0f);
}
}
LightType type() const { return fType; }
const SkColor3f& color() const { return fColor; }
const SkVector3& dir() const {
SkASSERT(kAmbient_LightType != fType);
return fDirection;
}
void setShadowMap(sk_sp<SkImage> shadowMap) {
fShadowMap = std::move(shadowMap);
}
SkImage* getShadowMap() const {
return fShadowMap.get();
}
Light& operator= (const Light& b) {
if (this == &b) {
return *this;
}
fColor = b.fColor;
fType = b.fType;
fDirection = b.fDirection;
fShadowMap = b.fShadowMap;
return *this;
}
private:
LightType fType;
SkColor3f fColor; // linear (unpremul) color. Range is 0..1 in each channel.
SkVector3 fDirection; // direction towards the light (+Z is out of the screen).
// If degenerate, it will be replaced with (0, 0, 1).
sk_sp<SkImage> fShadowMap;
};
class Builder {
public:
Builder() : fLights(new SkLights) { }
void add(const Light& light) {
if (fLights) {
fLights->fLights.push_back(light);
}
}
void add(Light&& light) {
if (fLights) {
fLights->fLights.push_back(std::move(light));
}
}
sk_sp<SkLights> finish() {
return std::move(fLights);
}
private:
sk_sp<SkLights> fLights;
};
int numLights() const {
return fLights.count();
}
const Light& light(int index) const {
return fLights[index];
}
Light& light(int index) {
return fLights[index];
}
private:
SkLights() {}
SkTArray<Light> fLights;
typedef SkRefCnt INHERITED;
};
#endif