SkiaRecordingCanvas.cpp revision 021693b967a2c5556dddd183eb0247df4079e1ad 
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
25namespace android {
26namespace uirenderer {
27namespace skiapipeline {
28
29// ----------------------------------------------------------------------------
30// Recording Canvas Setup
31// ----------------------------------------------------------------------------
32
33void SkiaRecordingCanvas::initDisplayList(uirenderer::RenderNode* renderNode, int width,
34        int height) {
35    mBarrierPending = false;
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(nullptr, 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    mBarrierPending = enableReorder;
80
81    if (nullptr != mCurrentBarrier) {
82        // finish off the existing chunk
83        SkDrawable* drawable =
84                mDisplayList->allocateDrawable<EndReorderBarrierDrawable>(
85                mCurrentBarrier);
86        mCurrentBarrier = nullptr;
87        drawDrawable(drawable);
88    }
89}
90
91void SkiaRecordingCanvas::drawLayer(uirenderer::DeferredLayerUpdater* layerUpdater) {
92    if (layerUpdater != nullptr && layerUpdater->backingLayer() != nullptr) {
93        uirenderer::Layer* layer = layerUpdater->backingLayer();
94        sk_sp<SkDrawable> drawable(new LayerDrawable(layer));
95        drawDrawable(drawable.get());
96    }
97}
98
99void SkiaRecordingCanvas::drawRenderNode(uirenderer::RenderNode* renderNode) {
100    // lazily create the chunk if needed
101    if (mBarrierPending) {
102        mCurrentBarrier = (StartReorderBarrierDrawable*)
103                mDisplayList->allocateDrawable<StartReorderBarrierDrawable>(
104                mDisplayList.get());
105        drawDrawable(mCurrentBarrier);
106        mBarrierPending = false;
107    }
108
109    // record the child node
110    mDisplayList->mChildNodes.emplace_back(renderNode, asSkCanvas());
111    drawDrawable(&mDisplayList->mChildNodes.back());
112
113    // use staging property, since recording on UI thread
114    if (renderNode->stagingProperties().isProjectionReceiver()) {
115        mDisplayList->mIsProjectionReceiver = true;
116        // set projectionReceiveIndex so that RenderNode.hasProjectionReceiver returns true
117        mDisplayList->projectionReceiveIndex = mDisplayList->mChildNodes.size() - 1;
118    }
119}
120
121void SkiaRecordingCanvas::callDrawGLFunction(Functor* functor,
122        uirenderer::GlFunctorLifecycleListener* listener) {
123    mDisplayList->mChildFunctors.emplace_back(functor, listener, asSkCanvas());
124    drawDrawable(&mDisplayList->mChildFunctors.back());
125}
126
127class VectorDrawable : public SkDrawable {
128 public:
129    VectorDrawable(VectorDrawableRoot* tree) : mRoot(tree) {}
130
131 protected:
132     virtual SkRect onGetBounds() override {
133         return SkRect::MakeLargest();
134     }
135     virtual void onDraw(SkCanvas* canvas) override {
136         Bitmap& hwuiBitmap = mRoot->getBitmapUpdateIfDirty();
137         SkBitmap bitmap;
138         hwuiBitmap.getSkBitmap(&bitmap);
139         SkPaint* paint = mRoot->getPaint();
140         canvas->drawBitmapRect(bitmap, mRoot->mutateProperties()->getBounds(), paint);
141         /*
142          * TODO we can draw this directly but need to address the following...
143          *
144          * 1) Add drawDirect(SkCanvas*) to VectorDrawableRoot
145          * 2) fix VectorDrawable.cpp's Path::draw to not make a temporary path
146          *    so that we don't break caching
147          * 3) figure out how to set path's as volatile during animation
148          * 4) if mRoot->getPaint() != null either promote to layer (during
149          *    animation) or cache in SkSurface (for static content)
150          *
151          */
152     }
153
154 private:
155    sp<VectorDrawableRoot> mRoot;
156};
157
158void SkiaRecordingCanvas::drawVectorDrawable(VectorDrawableRoot* tree) {
159    drawDrawable(mDisplayList->allocateDrawable<VectorDrawable>(tree));
160    mDisplayList->mVectorDrawables.push_back(tree);
161}
162
163// ----------------------------------------------------------------------------
164// Recording Canvas draw operations: Bitmaps
165// ----------------------------------------------------------------------------
166
167inline static const SkPaint* nonAAPaint(const SkPaint* origPaint, SkPaint* tmpPaint) {
168    if (origPaint && origPaint->isAntiAlias()) {
169        *tmpPaint = *origPaint;
170        tmpPaint->setAntiAlias(false);
171        return tmpPaint;
172    } else {
173        return origPaint;
174    }
175}
176
177void SkiaRecordingCanvas::drawBitmap(Bitmap& bitmap, float left, float top, const SkPaint* paint) {
178    SkBitmap skBitmap;
179    bitmap.getSkBitmap(&skBitmap);
180
181    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(skBitmap, kNever_SkCopyPixelsMode);
182    if (!skBitmap.isImmutable()) {
183        mDisplayList->mMutableImages.push_back(image.get());
184    }
185    SkPaint tmpPaint;
186    mRecorder.drawImage(image, left, top, nonAAPaint(paint, &tmpPaint));
187}
188
189void SkiaRecordingCanvas::drawBitmap(Bitmap& hwuiBitmap, const SkMatrix& matrix,
190        const SkPaint* paint) {
191    SkBitmap bitmap;
192    hwuiBitmap.getSkBitmap(&bitmap);
193    SkAutoCanvasRestore acr(&mRecorder, true);
194    concat(matrix);
195    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode);
196    if (!bitmap.isImmutable()) {
197        mDisplayList->mMutableImages.push_back(image.get());
198    }
199    SkPaint tmpPaint;
200    mRecorder.drawImage(image, 0, 0, nonAAPaint(paint, &tmpPaint));
201}
202
203void SkiaRecordingCanvas::drawBitmap(Bitmap& hwuiBitmap, float srcLeft, float srcTop,
204        float srcRight, float srcBottom, float dstLeft, float dstTop, float dstRight,
205        float dstBottom, const SkPaint* paint) {
206    SkBitmap bitmap;
207    hwuiBitmap.getSkBitmap(&bitmap);
208    SkRect srcRect = SkRect::MakeLTRB(srcLeft, srcTop, srcRight, srcBottom);
209    SkRect dstRect = SkRect::MakeLTRB(dstLeft, dstTop, dstRight, dstBottom);
210    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode);
211    if (!bitmap.isImmutable()) {
212        mDisplayList->mMutableImages.push_back(image.get());
213    }
214    SkPaint tmpPaint;
215    mRecorder.drawImageRect(image, srcRect, dstRect, nonAAPaint(paint, &tmpPaint));
216}
217
218void SkiaRecordingCanvas::drawNinePatch(Bitmap& hwuiBitmap, const Res_png_9patch& chunk,
219        float dstLeft, float dstTop, float dstRight, float dstBottom, const SkPaint* paint) {
220    SkBitmap bitmap;
221    hwuiBitmap.getSkBitmap(&bitmap);
222
223    SkCanvas::Lattice lattice;
224    NinePatchUtils::SetLatticeDivs(&lattice, chunk, bitmap.width(), bitmap.height());
225
226    lattice.fFlags = nullptr;
227    int numFlags = 0;
228    if (chunk.numColors > 0 && chunk.numColors == NinePatchUtils::NumDistinctRects(lattice)) {
229        // We can expect the framework to give us a color for every distinct rect.
230        // Skia requires placeholder flags for degenerate rects.
231        numFlags = (lattice.fXCount + 1) * (lattice.fYCount + 1);
232    }
233
234    SkAutoSTMalloc<25, SkCanvas::Lattice::Flags> flags(numFlags);
235    if (numFlags > 0) {
236        NinePatchUtils::SetLatticeFlags(&lattice, flags.get(), numFlags, chunk);
237    }
238
239    lattice.fBounds = nullptr;
240    SkRect dst = SkRect::MakeLTRB(dstLeft, dstTop, dstRight, dstBottom);
241    sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, kNever_SkCopyPixelsMode);
242    if (!bitmap.isImmutable()) {
243        mDisplayList->mMutableImages.push_back(image.get());
244    }
245
246    SkPaint tmpPaint;
247    mRecorder.drawImageLattice(image.get(), lattice, dst, nonAAPaint(paint, &tmpPaint));
248}
249
250}; // namespace skiapipeline
251}; // namespace uirenderer
252}; // namespace android
253