FrameBuilder.cpp revision 7c02cab0b1c7db0fb786893240ec6f00f16c2cee 
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 "FrameBuilder.h"
18
19#include "Canvas.h"
20#include "LayerUpdateQueue.h"
21#include "RenderNode.h"
22#include "VectorDrawable.h"
23#include "renderstate/OffscreenBufferPool.h"
24#include "utils/FatVector.h"
25#include "utils/PaintUtils.h"
26#include "utils/TraceUtils.h"
27
28#include <SkPathOps.h>
29#include <utils/TypeHelpers.h>
30
31namespace android {
32namespace uirenderer {
33
34FrameBuilder::FrameBuilder(const LayerUpdateQueue& layers, const SkRect& clip,
35        uint32_t viewportWidth, uint32_t viewportHeight,
36        const std::vector< sp<RenderNode> >& nodes,
37        const LightGeometry& lightGeometry, const Rect &contentDrawBounds, Caches* caches)
38        : mCanvasState(*this)
39        , mCaches(caches)
40        , mLightRadius(lightGeometry.radius) {
41    ATRACE_NAME("prepare drawing commands");
42
43    mLayerBuilders.reserve(layers.entries().size());
44    mLayerStack.reserve(layers.entries().size());
45
46    // Prepare to defer Fbo0
47    auto fbo0 = mAllocator.create<LayerBuilder>(viewportWidth, viewportHeight, Rect(clip));
48    mLayerBuilders.push_back(fbo0);
49    mLayerStack.push_back(0);
50    mCanvasState.initializeSaveStack(viewportWidth, viewportHeight,
51            clip.fLeft, clip.fTop, clip.fRight, clip.fBottom,
52            lightGeometry.center);
53
54    // Render all layers to be updated, in order. Defer in reverse order, so that they'll be
55    // updated in the order they're passed in (mLayerBuilders are issued to Renderer in reverse)
56    for (int i = layers.entries().size() - 1; i >= 0; i--) {
57        RenderNode* layerNode = layers.entries()[i].renderNode;
58        // only schedule repaint if node still on layer - possible it may have been
59        // removed during a dropped frame, but layers may still remain scheduled so
60        // as not to lose info on what portion is damaged
61        if (CC_LIKELY(layerNode->getLayer() != nullptr)) {
62            const Rect& layerDamage = layers.entries()[i].damage;
63            layerNode->computeOrdering();
64
65            // map current light center into RenderNode's coordinate space
66            Vector3 lightCenter = mCanvasState.currentSnapshot()->getRelativeLightCenter();
67            layerNode->getLayer()->inverseTransformInWindow.mapPoint3d(lightCenter);
68
69            saveForLayer(layerNode->getWidth(), layerNode->getHeight(), 0, 0,
70                    layerDamage, lightCenter, nullptr, layerNode);
71
72            if (layerNode->getDisplayList()) {
73                deferNodeOps(*layerNode);
74            }
75            restoreForLayer();
76        }
77    }
78
79    // It there are multiple render nodes, they are laid out as follows:
80    // #0 - backdrop (content + caption)
81    // #1 - content (positioned at (0,0) and clipped to - its bounds mContentDrawBounds)
82    // #2 - additional overlay nodes
83    // Usually the backdrop cannot be seen since it will be entirely covered by the content. While
84    // resizing however it might become partially visible. The following render loop will crop the
85    // backdrop against the content and draw the remaining part of it. It will then draw the content
86    // cropped to the backdrop (since that indicates a shrinking of the window).
87    //
88    // Additional nodes will be drawn on top with no particular clipping semantics.
89
90    // The bounds of the backdrop against which the content should be clipped.
91    Rect backdropBounds = contentDrawBounds;
92    // Usually the contents bounds should be mContentDrawBounds - however - we will
93    // move it towards the fixed edge to give it a more stable appearance (for the moment).
94    // If there is no content bounds we ignore the layering as stated above and start with 2.
95    int layer = (contentDrawBounds.isEmpty() || nodes.size() == 1) ? 2 : 0;
96
97    for (const sp<RenderNode>& node : nodes) {
98        if (node->nothingToDraw()) continue;
99        node->computeOrdering();
100        int count = mCanvasState.save(SaveFlags::MatrixClip);
101
102        if (layer == 0) {
103            const RenderProperties& properties = node->properties();
104            Rect targetBounds(properties.getLeft(), properties.getTop(),
105                              properties.getRight(), properties.getBottom());
106            // Move the content bounds towards the fixed corner of the backdrop.
107            const int x = targetBounds.left;
108            const int y = targetBounds.top;
109            // Remember the intersection of the target bounds and the intersection bounds against
110            // which we have to crop the content.
111            backdropBounds.set(x, y, x + backdropBounds.getWidth(), y + backdropBounds.getHeight());
112            backdropBounds.doIntersect(targetBounds);
113        } else if (layer == 1) {
114            // We shift and clip the content to match its final location in the window.
115            const float left = contentDrawBounds.left;
116            const float top = contentDrawBounds.top;
117            const float dx = backdropBounds.left - left;
118            const float dy = backdropBounds.top - top;
119            const float width = backdropBounds.getWidth();
120            const float height = backdropBounds.getHeight();
121            mCanvasState.translate(dx, dy);
122            // It gets cropped against the bounds of the backdrop to stay inside.
123            mCanvasState.clipRect(left, top, left + width, top + height, SkRegion::kIntersect_Op);
124        }
125
126        deferNodePropsAndOps(*node);
127        mCanvasState.restoreToCount(count);
128        layer++;
129    }
130}
131
132void FrameBuilder::onViewportInitialized() {}
133
134void FrameBuilder::onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) {}
135
136void FrameBuilder::deferNodePropsAndOps(RenderNode& node) {
137    const RenderProperties& properties = node.properties();
138    const Outline& outline = properties.getOutline();
139    if (properties.getAlpha() <= 0
140            || (outline.getShouldClip() && outline.isEmpty())
141            || properties.getScaleX() == 0
142            || properties.getScaleY() == 0) {
143        return; // rejected
144    }
145
146    if (properties.getLeft() != 0 || properties.getTop() != 0) {
147        mCanvasState.translate(properties.getLeft(), properties.getTop());
148    }
149    if (properties.getStaticMatrix()) {
150        mCanvasState.concatMatrix(*properties.getStaticMatrix());
151    } else if (properties.getAnimationMatrix()) {
152        mCanvasState.concatMatrix(*properties.getAnimationMatrix());
153    }
154    if (properties.hasTransformMatrix()) {
155        if (properties.isTransformTranslateOnly()) {
156            mCanvasState.translate(properties.getTranslationX(), properties.getTranslationY());
157        } else {
158            mCanvasState.concatMatrix(*properties.getTransformMatrix());
159        }
160    }
161
162    const int width = properties.getWidth();
163    const int height = properties.getHeight();
164
165    Rect saveLayerBounds; // will be set to non-empty if saveLayer needed
166    const bool isLayer = properties.effectiveLayerType() != LayerType::None;
167    int clipFlags = properties.getClippingFlags();
168    if (properties.getAlpha() < 1) {
169        if (isLayer) {
170            clipFlags &= ~CLIP_TO_BOUNDS; // bounds clipping done by layer
171        }
172        if (CC_LIKELY(isLayer || !properties.getHasOverlappingRendering())) {
173            // simply scale rendering content's alpha
174            mCanvasState.scaleAlpha(properties.getAlpha());
175        } else {
176            // schedule saveLayer by initializing saveLayerBounds
177            saveLayerBounds.set(0, 0, width, height);
178            if (clipFlags) {
179                properties.getClippingRectForFlags(clipFlags, &saveLayerBounds);
180                clipFlags = 0; // all clipping done by savelayer
181            }
182        }
183
184        if (CC_UNLIKELY(ATRACE_ENABLED() && properties.promotedToLayer())) {
185            // pretend alpha always causes savelayer to warn about
186            // performance problem affecting old versions
187            ATRACE_FORMAT("%s alpha caused saveLayer %dx%d", node.getName(), width, height);
188        }
189    }
190    if (clipFlags) {
191        Rect clipRect;
192        properties.getClippingRectForFlags(clipFlags, &clipRect);
193        mCanvasState.clipRect(clipRect.left, clipRect.top, clipRect.right, clipRect.bottom,
194                SkRegion::kIntersect_Op);
195    }
196
197    if (properties.getRevealClip().willClip()) {
198        Rect bounds;
199        properties.getRevealClip().getBounds(&bounds);
200        mCanvasState.setClippingRoundRect(mAllocator,
201                bounds, properties.getRevealClip().getRadius());
202    } else if (properties.getOutline().willClip()) {
203        mCanvasState.setClippingOutline(mAllocator, &(properties.getOutline()));
204    }
205
206    bool quickRejected = mCanvasState.currentSnapshot()->getRenderTargetClip().isEmpty()
207            || (properties.getClipToBounds()
208                    && mCanvasState.quickRejectConservative(0, 0, width, height));
209    if (!quickRejected) {
210        // not rejected, so defer render as either Layer, or direct (possibly wrapped in saveLayer)
211        if (node.getLayer()) {
212            // HW layer
213            LayerOp* drawLayerOp = mAllocator.create_trivial<LayerOp>(node);
214            BakedOpState* bakedOpState = tryBakeOpState(*drawLayerOp);
215            if (bakedOpState) {
216                // Node's layer already deferred, schedule it to render into parent layer
217                currentLayer().deferUnmergeableOp(mAllocator, bakedOpState, OpBatchType::Bitmap);
218            }
219        } else if (CC_UNLIKELY(!saveLayerBounds.isEmpty())) {
220            // draw DisplayList contents within temporary, since persisted layer could not be used.
221            // (temp layers are clipped to viewport, since they don't persist offscreen content)
222            SkPaint saveLayerPaint;
223            saveLayerPaint.setAlpha(properties.getAlpha());
224            deferBeginLayerOp(*mAllocator.create_trivial<BeginLayerOp>(
225                    saveLayerBounds,
226                    Matrix4::identity(),
227                    nullptr, // no record-time clip - need only respect defer-time one
228                    &saveLayerPaint));
229            deferNodeOps(node);
230            deferEndLayerOp(*mAllocator.create_trivial<EndLayerOp>());
231        } else {
232            deferNodeOps(node);
233        }
234    }
235}
236
237typedef key_value_pair_t<float, const RenderNodeOp*> ZRenderNodeOpPair;
238
239template <typename V>
240static void buildZSortedChildList(V* zTranslatedNodes,
241        const DisplayList& displayList, const DisplayList::Chunk& chunk) {
242    if (chunk.beginChildIndex == chunk.endChildIndex) return;
243
244    for (size_t i = chunk.beginChildIndex; i < chunk.endChildIndex; i++) {
245        RenderNodeOp* childOp = displayList.getChildren()[i];
246        RenderNode* child = childOp->renderNode;
247        float childZ = child->properties().getZ();
248
249        if (!MathUtils::isZero(childZ) && chunk.reorderChildren) {
250            zTranslatedNodes->push_back(ZRenderNodeOpPair(childZ, childOp));
251            childOp->skipInOrderDraw = true;
252        } else if (!child->properties().getProjectBackwards()) {
253            // regular, in order drawing DisplayList
254            childOp->skipInOrderDraw = false;
255        }
256    }
257
258    // Z sort any 3d children (stable-ness makes z compare fall back to standard drawing order)
259    std::stable_sort(zTranslatedNodes->begin(), zTranslatedNodes->end());
260}
261
262template <typename V>
263static size_t findNonNegativeIndex(const V& zTranslatedNodes) {
264    for (size_t i = 0; i < zTranslatedNodes.size(); i++) {
265        if (zTranslatedNodes[i].key >= 0.0f) return i;
266    }
267    return zTranslatedNodes.size();
268}
269
270template <typename V>
271void FrameBuilder::defer3dChildren(ChildrenSelectMode mode, const V& zTranslatedNodes) {
272    const int size = zTranslatedNodes.size();
273    if (size == 0
274            || (mode == ChildrenSelectMode::Negative&& zTranslatedNodes[0].key > 0.0f)
275            || (mode == ChildrenSelectMode::Positive && zTranslatedNodes[size - 1].key < 0.0f)) {
276        // no 3d children to draw
277        return;
278    }
279
280    /**
281     * Draw shadows and (potential) casters mostly in order, but allow the shadows of casters
282     * with very similar Z heights to draw together.
283     *
284     * This way, if Views A & B have the same Z height and are both casting shadows, the shadows are
285     * underneath both, and neither's shadow is drawn on top of the other.
286     */
287    const size_t nonNegativeIndex = findNonNegativeIndex(zTranslatedNodes);
288    size_t drawIndex, shadowIndex, endIndex;
289    if (mode == ChildrenSelectMode::Negative) {
290        drawIndex = 0;
291        endIndex = nonNegativeIndex;
292        shadowIndex = endIndex; // draw no shadows
293    } else {
294        drawIndex = nonNegativeIndex;
295        endIndex = size;
296        shadowIndex = drawIndex; // potentially draw shadow for each pos Z child
297    }
298
299    float lastCasterZ = 0.0f;
300    while (shadowIndex < endIndex || drawIndex < endIndex) {
301        if (shadowIndex < endIndex) {
302            const RenderNodeOp* casterNodeOp = zTranslatedNodes[shadowIndex].value;
303            const float casterZ = zTranslatedNodes[shadowIndex].key;
304            // attempt to render the shadow if the caster about to be drawn is its caster,
305            // OR if its caster's Z value is similar to the previous potential caster
306            if (shadowIndex == drawIndex || casterZ - lastCasterZ < 0.1f) {
307                deferShadow(*casterNodeOp);
308
309                lastCasterZ = casterZ; // must do this even if current caster not casting a shadow
310                shadowIndex++;
311                continue;
312            }
313        }
314
315        const RenderNodeOp* childOp = zTranslatedNodes[drawIndex].value;
316        deferRenderNodeOpImpl(*childOp);
317        drawIndex++;
318    }
319}
320
321void FrameBuilder::deferShadow(const RenderNodeOp& casterNodeOp) {
322    auto& node = *casterNodeOp.renderNode;
323    auto& properties = node.properties();
324
325    if (properties.getAlpha() <= 0.0f
326            || properties.getOutline().getAlpha() <= 0.0f
327            || !properties.getOutline().getPath()
328            || properties.getScaleX() == 0
329            || properties.getScaleY() == 0) {
330        // no shadow to draw
331        return;
332    }
333
334    const SkPath* casterOutlinePath = properties.getOutline().getPath();
335    const SkPath* revealClipPath = properties.getRevealClip().getPath();
336    if (revealClipPath && revealClipPath->isEmpty()) return;
337
338    float casterAlpha = properties.getAlpha() * properties.getOutline().getAlpha();
339
340    // holds temporary SkPath to store the result of intersections
341    SkPath* frameAllocatedPath = nullptr;
342    const SkPath* casterPath = casterOutlinePath;
343
344    // intersect the shadow-casting path with the reveal, if present
345    if (revealClipPath) {
346        frameAllocatedPath = createFrameAllocatedPath();
347
348        Op(*casterPath, *revealClipPath, kIntersect_SkPathOp, frameAllocatedPath);
349        casterPath = frameAllocatedPath;
350    }
351
352    // intersect the shadow-casting path with the clipBounds, if present
353    if (properties.getClippingFlags() & CLIP_TO_CLIP_BOUNDS) {
354        if (!frameAllocatedPath) {
355            frameAllocatedPath = createFrameAllocatedPath();
356        }
357        Rect clipBounds;
358        properties.getClippingRectForFlags(CLIP_TO_CLIP_BOUNDS, &clipBounds);
359        SkPath clipBoundsPath;
360        clipBoundsPath.addRect(clipBounds.left, clipBounds.top,
361                clipBounds.right, clipBounds.bottom);
362
363        Op(*casterPath, clipBoundsPath, kIntersect_SkPathOp, frameAllocatedPath);
364        casterPath = frameAllocatedPath;
365    }
366
367
368    if (CC_LIKELY(!mCanvasState.getRenderTargetClipBounds().isEmpty())) {
369        Matrix4 shadowMatrixXY(casterNodeOp.localMatrix);
370        Matrix4 shadowMatrixZ(casterNodeOp.localMatrix);
371        node.applyViewPropertyTransforms(shadowMatrixXY, false);
372        node.applyViewPropertyTransforms(shadowMatrixZ, true);
373
374        LOG_ALWAYS_FATAL_IF(!mCaches, "Caches needed for shadows");
375        sp<TessellationCache::ShadowTask> task = mCaches->tessellationCache.getShadowTask(
376                mCanvasState.currentTransform(),
377                mCanvasState.getLocalClipBounds(),
378                casterAlpha >= 1.0f,
379                casterPath,
380                &shadowMatrixXY, &shadowMatrixZ,
381                mCanvasState.currentSnapshot()->getRelativeLightCenter(),
382                mLightRadius);
383        ShadowOp* shadowOp = mAllocator.create<ShadowOp>(task, casterAlpha);
384        BakedOpState* bakedOpState = BakedOpState::tryShadowOpConstruct(
385                mAllocator, *mCanvasState.writableSnapshot(), shadowOp);
386        if (CC_LIKELY(bakedOpState)) {
387            currentLayer().deferUnmergeableOp(mAllocator, bakedOpState, OpBatchType::Shadow);
388        }
389    }
390}
391
392void FrameBuilder::deferProjectedChildren(const RenderNode& renderNode) {
393    int count = mCanvasState.save(SaveFlags::MatrixClip);
394    const SkPath* projectionReceiverOutline = renderNode.properties().getOutline().getPath();
395
396    SkPath transformedMaskPath; // on stack, since BakedOpState makes a deep copy
397    if (projectionReceiverOutline) {
398        // transform the mask for this projector into render target space
399        // TODO: consider combining both transforms by stashing transform instead of applying
400        SkMatrix skCurrentTransform;
401        mCanvasState.currentTransform()->copyTo(skCurrentTransform);
402        projectionReceiverOutline->transform(
403                skCurrentTransform,
404                &transformedMaskPath);
405        mCanvasState.setProjectionPathMask(mAllocator, &transformedMaskPath);
406    }
407
408    for (size_t i = 0; i < renderNode.mProjectedNodes.size(); i++) {
409        RenderNodeOp* childOp = renderNode.mProjectedNodes[i];
410        RenderNode& childNode = *childOp->renderNode;
411
412        // Draw child if it has content, but ignore state in childOp - matrix already applied to
413        // transformFromCompositingAncestor, and record-time clip is ignored when projecting
414        if (!childNode.nothingToDraw()) {
415            int restoreTo = mCanvasState.save(SaveFlags::MatrixClip);
416
417            // Apply transform between ancestor and projected descendant
418            mCanvasState.concatMatrix(childOp->transformFromCompositingAncestor);
419
420            deferNodePropsAndOps(childNode);
421
422            mCanvasState.restoreToCount(restoreTo);
423        }
424    }
425    mCanvasState.restoreToCount(count);
426}
427
428/**
429 * Used to define a list of lambdas referencing private FrameBuilder::onXX::defer() methods.
430 *
431 * This allows opIds embedded in the RecordedOps to be used for dispatching to these lambdas.
432 * E.g. a BitmapOp op then would be dispatched to FrameBuilder::onBitmapOp(const BitmapOp&)
433 */
434#define OP_RECEIVER(Type) \
435        [](FrameBuilder& frameBuilder, const RecordedOp& op) { frameBuilder.defer##Type(static_cast<const Type&>(op)); },
436void FrameBuilder::deferNodeOps(const RenderNode& renderNode) {
437    typedef void (*OpDispatcher) (FrameBuilder& frameBuilder, const RecordedOp& op);
438    static OpDispatcher receivers[] = BUILD_DEFERRABLE_OP_LUT(OP_RECEIVER);
439
440    // can't be null, since DL=null node rejection happens before deferNodePropsAndOps
441    const DisplayList& displayList = *(renderNode.getDisplayList());
442    for (const DisplayList::Chunk& chunk : displayList.getChunks()) {
443        FatVector<ZRenderNodeOpPair, 16> zTranslatedNodes;
444        buildZSortedChildList(&zTranslatedNodes, displayList, chunk);
445
446        defer3dChildren(ChildrenSelectMode::Negative, zTranslatedNodes);
447        for (size_t opIndex = chunk.beginOpIndex; opIndex < chunk.endOpIndex; opIndex++) {
448            const RecordedOp* op = displayList.getOps()[opIndex];
449            receivers[op->opId](*this, *op);
450
451            if (CC_UNLIKELY(!renderNode.mProjectedNodes.empty()
452                    && displayList.projectionReceiveIndex >= 0
453                    && static_cast<int>(opIndex) == displayList.projectionReceiveIndex)) {
454                deferProjectedChildren(renderNode);
455            }
456        }
457        defer3dChildren(ChildrenSelectMode::Positive, zTranslatedNodes);
458    }
459}
460
461void FrameBuilder::deferRenderNodeOpImpl(const RenderNodeOp& op) {
462    if (op.renderNode->nothingToDraw()) return;
463    int count = mCanvasState.save(SaveFlags::MatrixClip);
464
465    // apply state from RecordedOp (clip first, since op's clip is transformed by current matrix)
466    mCanvasState.writableSnapshot()->mutateClipArea().applyClip(op.localClip,
467            *mCanvasState.currentSnapshot()->transform);
468    mCanvasState.concatMatrix(op.localMatrix);
469
470    // then apply state from node properties, and defer ops
471    deferNodePropsAndOps(*op.renderNode);
472
473    mCanvasState.restoreToCount(count);
474}
475
476void FrameBuilder::deferRenderNodeOp(const RenderNodeOp& op) {
477    if (!op.skipInOrderDraw) {
478        deferRenderNodeOpImpl(op);
479    }
480}
481
482/**
483 * Defers an unmergeable, strokeable op, accounting correctly
484 * for paint's style on the bounds being computed.
485 */
486void FrameBuilder::deferStrokeableOp(const RecordedOp& op, batchid_t batchId,
487        BakedOpState::StrokeBehavior strokeBehavior) {
488    // Note: here we account for stroke when baking the op
489    BakedOpState* bakedState = BakedOpState::tryStrokeableOpConstruct(
490            mAllocator, *mCanvasState.writableSnapshot(), op, strokeBehavior);
491    if (!bakedState) return; // quick rejected
492    currentLayer().deferUnmergeableOp(mAllocator, bakedState, batchId);
493}
494
495/**
496 * Returns batch id for tessellatable shapes, based on paint. Checks to see if path effect/AA will
497 * be used, since they trigger significantly different rendering paths.
498 *
499 * Note: not used for lines/points, since they don't currently support path effects.
500 */
501static batchid_t tessBatchId(const RecordedOp& op) {
502    const SkPaint& paint = *(op.paint);
503    return paint.getPathEffect()
504            ? OpBatchType::AlphaMaskTexture
505            : (paint.isAntiAlias() ? OpBatchType::AlphaVertices : OpBatchType::Vertices);
506}
507
508void FrameBuilder::deferArcOp(const ArcOp& op) {
509    deferStrokeableOp(op, tessBatchId(op));
510}
511
512static bool hasMergeableClip(const BakedOpState& state) {
513    return state.computedState.clipState
514            || state.computedState.clipState->mode == ClipMode::Rectangle;
515}
516
517void FrameBuilder::deferBitmapOp(const BitmapOp& op) {
518    BakedOpState* bakedState = tryBakeOpState(op);
519    if (!bakedState) return; // quick rejected
520
521    // Don't merge non-simply transformed or neg scale ops, SET_TEXTURE doesn't handle rotation
522    // Don't merge A8 bitmaps - the paint's color isn't compared by mergeId, or in
523    // MergingDrawBatch::canMergeWith()
524    if (bakedState->computedState.transform.isSimple()
525            && bakedState->computedState.transform.positiveScale()
526            && PaintUtils::getXfermodeDirect(op.paint) == SkXfermode::kSrcOver_Mode
527            && op.bitmap->colorType() != kAlpha_8_SkColorType
528            && hasMergeableClip(*bakedState)) {
529        mergeid_t mergeId = reinterpret_cast<mergeid_t>(op.bitmap->getGenerationID());
530        // TODO: AssetAtlas in mergeId
531        currentLayer().deferMergeableOp(mAllocator, bakedState, OpBatchType::Bitmap, mergeId);
532    } else {
533        currentLayer().deferUnmergeableOp(mAllocator, bakedState, OpBatchType::Bitmap);
534    }
535}
536
537void FrameBuilder::deferBitmapMeshOp(const BitmapMeshOp& op) {
538    BakedOpState* bakedState = tryBakeOpState(op);
539    if (!bakedState) return; // quick rejected
540    currentLayer().deferUnmergeableOp(mAllocator, bakedState, OpBatchType::Bitmap);
541}
542
543void FrameBuilder::deferBitmapRectOp(const BitmapRectOp& op) {
544    BakedOpState* bakedState = tryBakeOpState(op);
545    if (!bakedState) return; // quick rejected
546    currentLayer().deferUnmergeableOp(mAllocator, bakedState, OpBatchType::Bitmap);
547}
548
549void FrameBuilder::deferVectorDrawableOp(const VectorDrawableOp& op) {
550    const SkBitmap& bitmap = op.vectorDrawable->getBitmapUpdateIfDirty();
551    SkPaint* paint = op.vectorDrawable->getPaint();
552    const BitmapRectOp* resolvedOp = mAllocator.create_trivial<BitmapRectOp>(op.unmappedBounds,
553            op.localMatrix,
554            op.localClip,
555            paint,
556            &bitmap,
557            Rect(bitmap.width(), bitmap.height()));
558    deferBitmapRectOp(*resolvedOp);
559}
560
561void FrameBuilder::deferCirclePropsOp(const CirclePropsOp& op) {
562    // allocate a temporary oval op (with mAllocator, so it persists until render), so the
563    // renderer doesn't have to handle the RoundRectPropsOp type, and so state baking is simple.
564    float x = *(op.x);
565    float y = *(op.y);
566    float radius = *(op.radius);
567    Rect unmappedBounds(x - radius, y - radius, x + radius, y + radius);
568    const OvalOp* resolvedOp = mAllocator.create_trivial<OvalOp>(
569            unmappedBounds,
570            op.localMatrix,
571            op.localClip,
572            op.paint);
573    deferOvalOp(*resolvedOp);
574}
575
576void FrameBuilder::deferFunctorOp(const FunctorOp& op) {
577    BakedOpState* bakedState = tryBakeOpState(op);
578    if (!bakedState) return; // quick rejected
579    currentLayer().deferUnmergeableOp(mAllocator, bakedState, OpBatchType::Functor);
580}
581
582void FrameBuilder::deferLinesOp(const LinesOp& op) {
583    batchid_t batch = op.paint->isAntiAlias() ? OpBatchType::AlphaVertices : OpBatchType::Vertices;
584    deferStrokeableOp(op, batch, BakedOpState::StrokeBehavior::Forced);
585}
586
587void FrameBuilder::deferOvalOp(const OvalOp& op) {
588    deferStrokeableOp(op, tessBatchId(op));
589}
590
591void FrameBuilder::deferPatchOp(const PatchOp& op) {
592    BakedOpState* bakedState = tryBakeOpState(op);
593    if (!bakedState) return; // quick rejected
594
595    if (bakedState->computedState.transform.isPureTranslate()
596            && PaintUtils::getXfermodeDirect(op.paint) == SkXfermode::kSrcOver_Mode
597            && hasMergeableClip(*bakedState)) {
598        mergeid_t mergeId = reinterpret_cast<mergeid_t>(op.bitmap->getGenerationID());
599        // TODO: AssetAtlas in mergeId
600
601        // Only use the MergedPatch batchId when merged, so Bitmap+Patch don't try to merge together
602        currentLayer().deferMergeableOp(mAllocator, bakedState, OpBatchType::MergedPatch, mergeId);
603    } else {
604        // Use Bitmap batchId since Bitmap+Patch use same shader
605        currentLayer().deferUnmergeableOp(mAllocator, bakedState, OpBatchType::Bitmap);
606    }
607}
608
609void FrameBuilder::deferPathOp(const PathOp& op) {
610    deferStrokeableOp(op, OpBatchType::Bitmap);
611}
612
613void FrameBuilder::deferPointsOp(const PointsOp& op) {
614    batchid_t batch = op.paint->isAntiAlias() ? OpBatchType::AlphaVertices : OpBatchType::Vertices;
615    deferStrokeableOp(op, batch, BakedOpState::StrokeBehavior::Forced);
616}
617
618void FrameBuilder::deferRectOp(const RectOp& op) {
619    deferStrokeableOp(op, tessBatchId(op));
620}
621
622void FrameBuilder::deferRoundRectOp(const RoundRectOp& op) {
623    deferStrokeableOp(op, tessBatchId(op));
624}
625
626void FrameBuilder::deferRoundRectPropsOp(const RoundRectPropsOp& op) {
627    // allocate a temporary round rect op (with mAllocator, so it persists until render), so the
628    // renderer doesn't have to handle the RoundRectPropsOp type, and so state baking is simple.
629    const RoundRectOp* resolvedOp = mAllocator.create_trivial<RoundRectOp>(
630            Rect(*(op.left), *(op.top), *(op.right), *(op.bottom)),
631            op.localMatrix,
632            op.localClip,
633            op.paint, *op.rx, *op.ry);
634    deferRoundRectOp(*resolvedOp);
635}
636
637void FrameBuilder::deferSimpleRectsOp(const SimpleRectsOp& op) {
638    BakedOpState* bakedState = tryBakeOpState(op);
639    if (!bakedState) return; // quick rejected
640    currentLayer().deferUnmergeableOp(mAllocator, bakedState, OpBatchType::Vertices);
641}
642
643static batchid_t textBatchId(const SkPaint& paint) {
644    // TODO: better handling of shader (since we won't care about color then)
645    return paint.getColor() == SK_ColorBLACK ? OpBatchType::Text : OpBatchType::ColorText;
646}
647
648void FrameBuilder::deferTextOp(const TextOp& op) {
649    BakedOpState* bakedState = BakedOpState::tryStrokeableOpConstruct(
650            mAllocator, *mCanvasState.writableSnapshot(), op,
651            BakedOpState::StrokeBehavior::StyleDefined);
652    if (!bakedState) return; // quick rejected
653
654    batchid_t batchId = textBatchId(*(op.paint));
655    if (bakedState->computedState.transform.isPureTranslate()
656            && PaintUtils::getXfermodeDirect(op.paint) == SkXfermode::kSrcOver_Mode
657            && hasMergeableClip(*bakedState)) {
658        mergeid_t mergeId = reinterpret_cast<mergeid_t>(op.paint->getColor());
659        currentLayer().deferMergeableOp(mAllocator, bakedState, batchId, mergeId);
660    } else {
661        currentLayer().deferUnmergeableOp(mAllocator, bakedState, batchId);
662    }
663}
664
665void FrameBuilder::deferTextOnPathOp(const TextOnPathOp& op) {
666    BakedOpState* bakedState = tryBakeOpState(op);
667    if (!bakedState) return; // quick rejected
668    currentLayer().deferUnmergeableOp(mAllocator, bakedState, textBatchId(*(op.paint)));
669}
670
671void FrameBuilder::deferTextureLayerOp(const TextureLayerOp& op) {
672    BakedOpState* bakedState = tryBakeOpState(op);
673    if (!bakedState) return; // quick rejected
674    currentLayer().deferUnmergeableOp(mAllocator, bakedState, OpBatchType::TextureLayer);
675}
676
677void FrameBuilder::saveForLayer(uint32_t layerWidth, uint32_t layerHeight,
678        float contentTranslateX, float contentTranslateY,
679        const Rect& repaintRect,
680        const Vector3& lightCenter,
681        const BeginLayerOp* beginLayerOp, RenderNode* renderNode) {
682    mCanvasState.save(SaveFlags::MatrixClip);
683    mCanvasState.writableSnapshot()->initializeViewport(layerWidth, layerHeight);
684    mCanvasState.writableSnapshot()->roundRectClipState = nullptr;
685    mCanvasState.writableSnapshot()->setRelativeLightCenter(lightCenter);
686    mCanvasState.writableSnapshot()->transform->loadTranslate(
687            contentTranslateX, contentTranslateY, 0);
688    mCanvasState.writableSnapshot()->setClip(
689            repaintRect.left, repaintRect.top, repaintRect.right, repaintRect.bottom);
690
691    // create a new layer repaint, and push its index on the stack
692    mLayerStack.push_back(mLayerBuilders.size());
693    auto newFbo = mAllocator.create<LayerBuilder>(layerWidth, layerHeight,
694            repaintRect, beginLayerOp, renderNode);
695    mLayerBuilders.push_back(newFbo);
696}
697
698void FrameBuilder::restoreForLayer() {
699    // restore canvas, and pop finished layer off of the stack
700    mCanvasState.restore();
701    mLayerStack.pop_back();
702}
703
704// TODO: defer time rejection (when bounds become empty) + tests
705// Option - just skip layers with no bounds at playback + defer?
706void FrameBuilder::deferBeginLayerOp(const BeginLayerOp& op) {
707    uint32_t layerWidth = (uint32_t) op.unmappedBounds.getWidth();
708    uint32_t layerHeight = (uint32_t) op.unmappedBounds.getHeight();
709
710    auto previous = mCanvasState.currentSnapshot();
711    Vector3 lightCenter = previous->getRelativeLightCenter();
712
713    // Combine all transforms used to present saveLayer content:
714    // parent content transform * canvas transform * bounds offset
715    Matrix4 contentTransform(*(previous->transform));
716    contentTransform.multiply(op.localMatrix);
717    contentTransform.translate(op.unmappedBounds.left, op.unmappedBounds.top);
718
719    Matrix4 inverseContentTransform;
720    inverseContentTransform.loadInverse(contentTransform);
721
722    // map the light center into layer-relative space
723    inverseContentTransform.mapPoint3d(lightCenter);
724
725    // Clip bounds of temporary layer to parent's clip rect, so:
726    Rect saveLayerBounds(layerWidth, layerHeight);
727    //     1) transform Rect(width, height) into parent's space
728    //        note: left/top offsets put in contentTransform above
729    contentTransform.mapRect(saveLayerBounds);
730    //     2) intersect with parent's clip
731    saveLayerBounds.doIntersect(previous->getRenderTargetClip());
732    //     3) and transform back
733    inverseContentTransform.mapRect(saveLayerBounds);
734    saveLayerBounds.doIntersect(Rect(layerWidth, layerHeight));
735    saveLayerBounds.roundOut();
736
737    // if bounds are reduced, will clip the layer's area by reducing required bounds...
738    layerWidth = saveLayerBounds.getWidth();
739    layerHeight = saveLayerBounds.getHeight();
740    // ...and shifting drawing content to account for left/top side clipping
741    float contentTranslateX = -saveLayerBounds.left;
742    float contentTranslateY = -saveLayerBounds.top;
743
744    saveForLayer(layerWidth, layerHeight,
745            contentTranslateX, contentTranslateY,
746            Rect(layerWidth, layerHeight),
747            lightCenter,
748            &op, nullptr);
749}
750
751void FrameBuilder::deferEndLayerOp(const EndLayerOp& /* ignored */) {
752    const BeginLayerOp& beginLayerOp = *currentLayer().beginLayerOp;
753    int finishedLayerIndex = mLayerStack.back();
754
755    restoreForLayer();
756
757    // record the draw operation into the previous layer's list of draw commands
758    // uses state from the associated beginLayerOp, since it has all the state needed for drawing
759    LayerOp* drawLayerOp = mAllocator.create_trivial<LayerOp>(
760            beginLayerOp.unmappedBounds,
761            beginLayerOp.localMatrix,
762            beginLayerOp.localClip,
763            beginLayerOp.paint,
764            &(mLayerBuilders[finishedLayerIndex]->offscreenBuffer));
765    BakedOpState* bakedOpState = tryBakeOpState(*drawLayerOp);
766
767    if (bakedOpState) {
768        // Layer will be drawn into parent layer (which is now current, since we popped mLayerStack)
769        currentLayer().deferUnmergeableOp(mAllocator, bakedOpState, OpBatchType::Bitmap);
770    } else {
771        // Layer won't be drawn - delete its drawing batches to prevent it from doing any work
772        // TODO: need to prevent any render work from being done
773        // - create layerop earlier for reject purposes?
774        mLayerBuilders[finishedLayerIndex]->clear();
775        return;
776    }
777}
778
779void FrameBuilder::deferBeginUnclippedLayerOp(const BeginUnclippedLayerOp& op) {
780    Matrix4 boundsTransform(*(mCanvasState.currentSnapshot()->transform));
781    boundsTransform.multiply(op.localMatrix);
782
783    Rect dstRect(op.unmappedBounds);
784    boundsTransform.mapRect(dstRect);
785    dstRect.doIntersect(mCanvasState.currentSnapshot()->getRenderTargetClip());
786
787    if (dstRect.isEmpty()) {
788        // Unclipped layer rejected - push a null op, so next EndUnclippedLayerOp is ignored
789        currentLayer().activeUnclippedSaveLayers.push_back(nullptr);
790    } else {
791        // Allocate a holding position for the layer object (copyTo will produce, copyFrom will consume)
792        OffscreenBuffer** layerHandle = mAllocator.create<OffscreenBuffer*>(nullptr);
793
794        /**
795         * First, defer an operation to copy out the content from the rendertarget into a layer.
796         */
797        auto copyToOp = mAllocator.create_trivial<CopyToLayerOp>(op, layerHandle);
798        BakedOpState* bakedState = BakedOpState::directConstruct(mAllocator,
799                &(currentLayer().repaintClip), dstRect, *copyToOp);
800        currentLayer().deferUnmergeableOp(mAllocator, bakedState, OpBatchType::CopyToLayer);
801
802        /**
803         * Defer a clear rect, so that clears from multiple unclipped layers can be drawn
804         * both 1) simultaneously, and 2) as long after the copyToLayer executes as possible
805         */
806        currentLayer().deferLayerClear(dstRect);
807
808        /**
809         * And stash an operation to copy that layer back under the rendertarget until
810         * a balanced EndUnclippedLayerOp is seen
811         */
812        auto copyFromOp = mAllocator.create_trivial<CopyFromLayerOp>(op, layerHandle);
813        bakedState = BakedOpState::directConstruct(mAllocator,
814                &(currentLayer().repaintClip), dstRect, *copyFromOp);
815        currentLayer().activeUnclippedSaveLayers.push_back(bakedState);
816    }
817}
818
819void FrameBuilder::deferEndUnclippedLayerOp(const EndUnclippedLayerOp& /* ignored */) {
820    LOG_ALWAYS_FATAL_IF(currentLayer().activeUnclippedSaveLayers.empty(), "no layer to end!");
821
822    BakedOpState* copyFromLayerOp = currentLayer().activeUnclippedSaveLayers.back();
823    currentLayer().activeUnclippedSaveLayers.pop_back();
824    if (copyFromLayerOp) {
825        currentLayer().deferUnmergeableOp(mAllocator, copyFromLayerOp, OpBatchType::CopyFromLayer);
826    }
827}
828
829} // namespace uirenderer
830} // namespace android
831