SkiaRecordingCanvas.cpp revision ee708facf127f2e8bed5970d5c05fa823fcfc1ce 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "SkiaRecordingCanvas.h"
18
19#include "Layer.h"
20#include "RenderNode.h"
21#include "LayerDrawable.h"
22#include "NinePatchUtils.h"
23#include "pipeline/skia/AnimatedDrawables.h"
24#include <SkImagePriv.h>
25
26namespace android {
27namespace uirenderer {
28namespace skiapipeline {
29
30// ----------------------------------------------------------------------------
31// Recording Canvas Setup
32// ----------------------------------------------------------------------------
33
34void SkiaRecordingCanvas::initDisplayList(uirenderer::RenderNode* renderNode, int width,
35        int height) {
36    mCurrentBarrier = nullptr;
37    SkASSERT(mDisplayList.get() == nullptr);
38
39    if (renderNode) {
40        mDisplayList = renderNode->detachAvailableList();
41    }
42    SkRect bounds = SkRect::MakeWH(width, height);
43    if (mDisplayList) {
44        mDisplayList->reset(bounds);
45    } else {
46        mDisplayList.reset(new SkiaDisplayList(bounds));
47    }
48
49    mRecorder.reset(mDisplayList->mDrawable.get());
50    SkiaCanvas::reset(&mRecorder);
51}
52
53uirenderer::DisplayList* SkiaRecordingCanvas::finishRecording() {
54    // close any existing chunks if necessary
55    insertReorderBarrier(false);
56    mRecorder.restoreToCount(1);
57    return mDisplayList.release();
58}
59
60// ----------------------------------------------------------------------------
61// Recording Canvas draw operations: View System
62// ----------------------------------------------------------------------------
63
64void SkiaRecordingCanvas::drawRoundRect(uirenderer::CanvasPropertyPrimitive* left,
65        uirenderer::CanvasPropertyPrimitive* top, uirenderer::CanvasPropertyPrimitive* right,
66        uirenderer::CanvasPropertyPrimitive* bottom, uirenderer::CanvasPropertyPrimitive* rx,
67        uirenderer::CanvasPropertyPrimitive* ry, uirenderer::CanvasPropertyPaint* paint) {
68    drawDrawable(mDisplayList->allocateDrawable<AnimatedRoundRect>(left, top, right, bottom,
69            rx, ry, paint));
70}
71
72void SkiaRecordingCanvas::drawCircle(uirenderer::CanvasPropertyPrimitive* x,
73        uirenderer::CanvasPropertyPrimitive* y, uirenderer::CanvasPropertyPrimitive* radius,
74        uirenderer::CanvasPropertyPaint* paint) {
75    drawDrawable(mDisplayList->allocateDrawable<AnimatedCircle>(x, y, radius, paint));
76}
77
78void SkiaRecordingCanvas::insertReorderBarrier(bool enableReorder) {
79    if (nullptr != mCurrentBarrier) {
80        // finish off the existing chunk
81        SkDrawable* drawable =
82                mDisplayList->allocateDrawable<EndReorderBarrierDrawable>(
83                mCurrentBarrier);
84        mCurrentBarrier = nullptr;
85        drawDrawable(drawable);
86    }
87    if (enableReorder) {
88        mCurrentBarrier = (StartReorderBarrierDrawable*)
89                mDisplayList->allocateDrawable<StartReorderBarrierDrawable>(
90                mDisplayList.get());
91        drawDrawable(mCurrentBarrier);
92    }
93}
94
95void SkiaRecordingCanvas::drawLayer(uirenderer::DeferredLayerUpdater* layerUpdater) {
96    if (layerUpdater != nullptr && layerUpdater->backingLayer() != nullptr) {
97        uirenderer::Layer* layer = layerUpdater->backingLayer();
98        sk_sp<SkDrawable> drawable(new LayerDrawable(layer));
99        drawDrawable(drawable.get());
100    }
101}
102
103void SkiaRecordingCanvas::drawRenderNode(uirenderer::RenderNode* renderNode) {
104    // record the child node
105    mDisplayList->mChildNodes.emplace_back(renderNode, asSkCanvas(), true, mCurrentBarrier);
106    auto& renderNodeDrawable = mDisplayList->mChildNodes.back();
107    drawDrawable(&renderNodeDrawable);
108
109    // use staging property, since recording on UI thread
110    if (renderNode->stagingProperties().isProjectionReceiver()) {
111        mDisplayList->mProjectionReceiver = &renderNodeDrawable;
112        // set projectionReceiveIndex so that RenderNode.hasProjectionReceiver returns true
113        mDisplayList->projectionReceiveIndex = mDisplayList->mChildNodes.size() - 1;
114    }
115}
116
117void SkiaRecordingCanvas::callDrawGLFunction(Functor* functor,
118        uirenderer::GlFunctorLifecycleListener* listener) {
119    mDisplayList->mChildFunctors.emplace_back(functor, listener, asSkCanvas());
120    drawDrawable(&mDisplayList->mChildFunctors.back());
121}
122
123class VectorDrawable : public SkDrawable {
124 public:
125    VectorDrawable(VectorDrawableRoot* tree) : mRoot(tree) {}
126
127 protected:
128     virtual SkRect onGetBounds() override {
129         return SkRect::MakeLargest();
130     }
131     virtual void onDraw(SkCanvas* canvas) override {
132         Bitmap& hwuiBitmap = mRoot->getBitmapUpdateIfDirty();
133         SkBitmap bitmap;
134         hwuiBitmap.getSkBitmap(&bitmap);
135         SkPaint* paint = mRoot->getPaint();
136         canvas->drawBitmapRect(bitmap, mRoot->mutateProperties()->getBounds(), paint);
137         /*
138          * TODO we can draw this directly but need to address the following...
139          *
140          * 1) Add drawDirect(SkCanvas*) to VectorDrawableRoot
141          * 2) fix VectorDrawable.cpp's Path::draw to not make a temporary path
142          *    so that we don't break caching
143          * 3) figure out how to set path's as volatile during animation
144          * 4) if mRoot->getPaint() != null either promote to layer (during
145          *    animation) or cache in SkSurface (for static content)
146          *
147          */
148     }
149
150 private:
151    sp<VectorDrawableRoot> mRoot;
152};
153
154void SkiaRecordingCanvas::drawVectorDrawable(VectorDrawableRoot* tree) {
155    drawDrawable(mDisplayList->allocateDrawable<VectorDrawable>(tree));
156    mDisplayList->mVectorDrawables.push_back(tree);
157}
158
159// ----------------------------------------------------------------------------
160// Recording Canvas draw operations: Bitmaps
161// ----------------------------------------------------------------------------
162
163inline static const SkPaint* nonAAPaint(const SkPaint* origPaint, SkPaint* tmpPaint) {
164    if (origPaint && origPaint->isAntiAlias()) {
165        *tmpPaint = *origPaint;
166        tmpPaint->setAntiAlias(false);
167        return tmpPaint;
168    } else {
169        return origPaint;
170    }
171}
172
173void SkiaRecordingCanvas::drawBitmap(Bitmap& bitmap, float left, float top, const SkPaint* paint) {
174    SkBitmap skBitmap;
175    bitmap.getSkBitmap(&skBitmap);
176
177    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(skBitmap, kNever_SkCopyPixelsMode);
178    if (!skBitmap.isImmutable()) {
179        mDisplayList->mMutableImages.push_back(image.get());
180    }
181    SkPaint tmpPaint;
182    mRecorder.drawImage(image, left, top, nonAAPaint(paint, &tmpPaint));
183}
184
185void SkiaRecordingCanvas::drawBitmap(Bitmap& hwuiBitmap, const SkMatrix& matrix,
186        const SkPaint* paint) {
187    SkBitmap bitmap;
188    hwuiBitmap.getSkBitmap(&bitmap);
189    SkAutoCanvasRestore acr(&mRecorder, true);
190    concat(matrix);
191    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode);
192    if (!bitmap.isImmutable()) {
193        mDisplayList->mMutableImages.push_back(image.get());
194    }
195    SkPaint tmpPaint;
196    mRecorder.drawImage(image, 0, 0, nonAAPaint(paint, &tmpPaint));
197}
198
199void SkiaRecordingCanvas::drawBitmap(Bitmap& hwuiBitmap, float srcLeft, float srcTop,
200        float srcRight, float srcBottom, float dstLeft, float dstTop, float dstRight,
201        float dstBottom, const SkPaint* paint) {
202    SkBitmap bitmap;
203    hwuiBitmap.getSkBitmap(&bitmap);
204    SkRect srcRect = SkRect::MakeLTRB(srcLeft, srcTop, srcRight, srcBottom);
205    SkRect dstRect = SkRect::MakeLTRB(dstLeft, dstTop, dstRight, dstBottom);
206    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode);
207    if (!bitmap.isImmutable()) {
208        mDisplayList->mMutableImages.push_back(image.get());
209    }
210    SkPaint tmpPaint;
211    mRecorder.drawImageRect(image, srcRect, dstRect, nonAAPaint(paint, &tmpPaint));
212}
213
214void SkiaRecordingCanvas::drawNinePatch(Bitmap& hwuiBitmap, const Res_png_9patch& chunk,
215        float dstLeft, float dstTop, float dstRight, float dstBottom, const SkPaint* paint) {
216    SkBitmap bitmap;
217    hwuiBitmap.getSkBitmap(&bitmap);
218
219    SkCanvas::Lattice lattice;
220    NinePatchUtils::SetLatticeDivs(&lattice, chunk, bitmap.width(), bitmap.height());
221
222    lattice.fFlags = nullptr;
223    int numFlags = 0;
224    if (chunk.numColors > 0 && chunk.numColors == NinePatchUtils::NumDistinctRects(lattice)) {
225        // We can expect the framework to give us a color for every distinct rect.
226        // Skia requires placeholder flags for degenerate rects.
227        numFlags = (lattice.fXCount + 1) * (lattice.fYCount + 1);
228    }
229
230    SkAutoSTMalloc<25, SkCanvas::Lattice::Flags> flags(numFlags);
231    if (numFlags > 0) {
232        NinePatchUtils::SetLatticeFlags(&lattice, flags.get(), numFlags, chunk);
233    }
234
235    lattice.fBounds = nullptr;
236    SkRect dst = SkRect::MakeLTRB(dstLeft, dstTop, dstRight, dstBottom);
237    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode);
238    if (!bitmap.isImmutable()) {
239        mDisplayList->mMutableImages.push_back(image.get());
240    }
241
242    SkPaint tmpPaint;
243    mRecorder.drawImageLattice(image.get(), lattice, dst, nonAAPaint(paint, &tmpPaint));
244}
245
246}; // namespace skiapipeline
247}; // namespace uirenderer
248}; // namespace android
249