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/*
* Copyright (C) 2016 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.
*/
#pragma once
#include "CanvasProperty.h"
#include "DeferredLayerUpdater.h"
#include "RenderNode.h"
#include "VectorDrawable.h"
#include "hwui/Canvas.h"
#include <SkCanvas.h>
#include <cassert>
#include <optional>
namespace android {
// Holds an SkCanvas reference plus additional native data.
class SkiaCanvas : public Canvas {
public:
explicit SkiaCanvas(const SkBitmap& bitmap);
/**
* Create a new SkiaCanvas.
*
* @param canvas SkCanvas to handle calls made to this SkiaCanvas. Must
* not be NULL. This constructor does not take ownership, so the caller
* must guarantee that it remains valid while the SkiaCanvas is valid.
*/
explicit SkiaCanvas(SkCanvas* canvas);
virtual ~SkiaCanvas();
virtual SkCanvas* asSkCanvas() override { return mCanvas; }
virtual void resetRecording(int width, int height,
uirenderer::RenderNode* renderNode) override {
LOG_ALWAYS_FATAL("SkiaCanvas cannot be reset as a recording canvas");
}
virtual uirenderer::DisplayList* finishRecording() override {
LOG_ALWAYS_FATAL("SkiaCanvas does not produce a DisplayList");
return nullptr;
}
virtual void insertReorderBarrier(bool enableReorder) override {
LOG_ALWAYS_FATAL("SkiaCanvas does not support reordering barriers");
}
virtual void setBitmap(const SkBitmap& bitmap) override;
virtual bool isOpaque() override;
virtual int width() override;
virtual int height() override;
virtual int getSaveCount() const override;
virtual int save(SaveFlags::Flags flags) override;
virtual void restore() override;
virtual void restoreToCount(int saveCount) override;
virtual void restoreUnclippedLayer(int saveCount, const SkPaint& paint) override;
virtual int saveLayer(float left, float top, float right, float bottom, const SkPaint* paint,
SaveFlags::Flags flags) override;
virtual int saveLayerAlpha(float left, float top, float right, float bottom, int alpha,
SaveFlags::Flags flags) override;
virtual int saveUnclippedLayer(int left, int top, int right, int bottom) override;
virtual void getMatrix(SkMatrix* outMatrix) const override;
virtual void setMatrix(const SkMatrix& matrix) override;
virtual void concat(const SkMatrix& matrix) override;
virtual void rotate(float degrees) override;
virtual void scale(float sx, float sy) override;
virtual void skew(float sx, float sy) override;
virtual void translate(float dx, float dy) override;
virtual bool getClipBounds(SkRect* outRect) const override;
virtual bool quickRejectRect(float left, float top, float right, float bottom) const override;
virtual bool quickRejectPath(const SkPath& path) const override;
virtual bool clipRect(float left, float top, float right, float bottom, SkClipOp op) override;
virtual bool clipPath(const SkPath* path, SkClipOp op) override;
virtual PaintFilter* getPaintFilter() override;
virtual void setPaintFilter(sk_sp<PaintFilter> paintFilter) override;
virtual SkCanvasState* captureCanvasState() const override;
virtual void drawColor(int color, SkBlendMode mode) override;
virtual void drawPaint(const SkPaint& paint) override;
virtual void drawPoint(float x, float y, const SkPaint& paint) override;
virtual void drawPoints(const float* points, int count, const SkPaint& paint) override;
virtual void drawLine(float startX, float startY, float stopX, float stopY,
const SkPaint& paint) override;
virtual void drawLines(const float* points, int count, const SkPaint& paint) override;
virtual void drawRect(float left, float top, float right, float bottom,
const SkPaint& paint) override;
virtual void drawRegion(const SkRegion& region, const SkPaint& paint) override;
virtual void drawRoundRect(float left, float top, float right, float bottom, float rx, float ry,
const SkPaint& paint) override;
virtual void drawDoubleRoundRect(const SkRRect& outer, const SkRRect& inner,
const SkPaint& paint) override;
virtual void drawCircle(float x, float y, float radius, const SkPaint& paint) override;
virtual void drawOval(float left, float top, float right, float bottom,
const SkPaint& paint) override;
virtual void drawArc(float left, float top, float right, float bottom, float startAngle,
float sweepAngle, bool useCenter, const SkPaint& paint) override;
virtual void drawPath(const SkPath& path, const SkPaint& paint) override;
virtual void drawVertices(const SkVertices*, SkBlendMode, const SkPaint& paint) override;
virtual void drawBitmap(Bitmap& bitmap, float left, float top, const SkPaint* paint) override;
virtual void drawBitmap(Bitmap& bitmap, const SkMatrix& matrix, const SkPaint* paint) override;
virtual void drawBitmap(Bitmap& bitmap, float srcLeft, float srcTop, float srcRight,
float srcBottom, float dstLeft, float dstTop, float dstRight,
float dstBottom, const SkPaint* paint) override;
virtual void drawBitmapMesh(Bitmap& bitmap, int meshWidth, int meshHeight,
const float* vertices, const int* colors,
const SkPaint* paint) override;
virtual void drawNinePatch(Bitmap& bitmap, const android::Res_png_9patch& chunk, float dstLeft,
float dstTop, float dstRight, float dstBottom,
const SkPaint* paint) override;
virtual double drawAnimatedImage(AnimatedImageDrawable* imgDrawable) override;
virtual bool drawTextAbsolutePos() const override { return true; }
virtual void drawVectorDrawable(VectorDrawableRoot* vectorDrawable) override;
virtual void drawRoundRect(uirenderer::CanvasPropertyPrimitive* left,
uirenderer::CanvasPropertyPrimitive* top,
uirenderer::CanvasPropertyPrimitive* right,
uirenderer::CanvasPropertyPrimitive* bottom,
uirenderer::CanvasPropertyPrimitive* rx,
uirenderer::CanvasPropertyPrimitive* ry,
uirenderer::CanvasPropertyPaint* paint) override;
virtual void drawCircle(uirenderer::CanvasPropertyPrimitive* x,
uirenderer::CanvasPropertyPrimitive* y,
uirenderer::CanvasPropertyPrimitive* radius,
uirenderer::CanvasPropertyPaint* paint) override;
virtual void drawLayer(uirenderer::DeferredLayerUpdater* layerHandle) override;
virtual void drawRenderNode(uirenderer::RenderNode* renderNode) override;
virtual void callDrawGLFunction(Functor* functor,
uirenderer::GlFunctorLifecycleListener* listener) override;
protected:
SkiaCanvas();
void reset(SkCanvas* skiaCanvas);
void drawDrawable(SkDrawable* drawable) { mCanvas->drawDrawable(drawable); }
virtual void drawGlyphs(ReadGlyphFunc glyphFunc, int count, const Paint& paint, float x,
float y, float boundsLeft, float boundsTop, float boundsRight,
float boundsBottom, float totalAdvance) override;
virtual void drawLayoutOnPath(const minikin::Layout& layout, float hOffset, float vOffset,
const Paint& paint, const SkPath& path, size_t start,
size_t end) override;
/** This class acts as a copy on write SkPaint.
*
* Initially this will be the SkPaint passed to the contructor.
* The first time writable() is called this will become a copy of the
* initial SkPaint (or a default SkPaint if nullptr).
*/
struct PaintCoW {
PaintCoW(const SkPaint& that) : mPtr(&that) {}
PaintCoW(const SkPaint* ptr) : mPtr(ptr) {}
PaintCoW(const PaintCoW&) = delete;
PaintCoW(PaintCoW&&) = delete;
PaintCoW& operator=(const PaintCoW&) = delete;
PaintCoW& operator=(PaintCoW&&) = delete;
SkPaint& writeable() {
if (!mStorage) {
if (!mPtr) {
mStorage.emplace();
} else {
mStorage.emplace(*mPtr);
}
mPtr = &*mStorage;
}
return *mStorage;
}
operator const SkPaint*() const { return mPtr; }
const SkPaint* operator->() const { assert(mPtr); return mPtr; }
const SkPaint& operator*() const { assert(mPtr); return *mPtr; }
explicit operator bool() { return mPtr != nullptr; }
private:
const SkPaint* mPtr;
std::optional<SkPaint> mStorage;
};
/** Filters the paint using the current paint filter.
*
* @param paint the paint to filter. Will be initialized with the default
* SkPaint before filtering if filtering is required.
*/
PaintCoW&& filterPaint(PaintCoW&& paint) const;
private:
struct SaveRec {
int saveCount;
SaveFlags::Flags saveFlags;
size_t clipIndex;
};
const SaveRec* currentSaveRec() const;
void recordPartialSave(SaveFlags::Flags flags);
template <typename T>
void recordClip(const T&, SkClipOp);
void applyPersistentClips(size_t clipStartIndex);
void drawPoints(const float* points, int count, const SkPaint& paint, SkCanvas::PointMode mode);
/** Filters the paint for bitmap drawing.
*
* After filtering the paint for bitmap drawing,
* also calls filterPaint on the paint.
*
* @param paint the paint to filter. Will be initialized with the default
* SkPaint before filtering if filtering is required.
*/
PaintCoW&& filterBitmap(PaintCoW&& paint, sk_sp<SkColorFilter> colorSpaceFilter) const;
class Clip;
std::unique_ptr<SkCanvas> mCanvasOwned; // might own a canvas we allocated
SkCanvas* mCanvas; // we do NOT own this canvas, it must survive us
// unless it is the same as mCanvasOwned.get()
std::unique_ptr<SkDeque> mSaveStack; // lazily allocated, tracks partial saves.
std::vector<Clip> mClipStack; // tracks persistent clips.
sk_sp<PaintFilter> mPaintFilter;
};
} // namespace android
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