BakedOpState.cpp revision 80d2ade939153da87b3cd3b0a69a713bf68b64ba 
1/*
2 * Copyright (C) 2015 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 "BakedOpState.h"
18
19#include "ClipArea.h"
20
21namespace android {
22namespace uirenderer {
23
24static int computeClipSideFlags(const Rect& clip, const Rect& bounds) {
25    int clipSideFlags = 0;
26    if (clip.left > bounds.left) clipSideFlags |= OpClipSideFlags::Left;
27    if (clip.top > bounds.top) clipSideFlags |= OpClipSideFlags::Top;
28    if (clip.right < bounds.right) clipSideFlags |= OpClipSideFlags::Right;
29    if (clip.bottom < bounds.bottom) clipSideFlags |= OpClipSideFlags::Bottom;
30    return clipSideFlags;
31}
32
33ResolvedRenderState::ResolvedRenderState(LinearAllocator& allocator, Snapshot& snapshot,
34        const RecordedOp& recordedOp, bool expandForStroke) {
35    // resolvedMatrix = parentMatrix * localMatrix
36    transform.loadMultiply(*snapshot.transform, recordedOp.localMatrix);
37
38    // resolvedClippedBounds = intersect(resolvedMatrix * opBounds, resolvedClipRect)
39    clippedBounds = recordedOp.unmappedBounds;
40    if (CC_UNLIKELY(expandForStroke)) {
41        // account for non-hairline stroke
42        clippedBounds.outset(recordedOp.paint->getStrokeWidth() * 0.5f);
43    }
44    transform.mapRect(clippedBounds);
45    if (CC_UNLIKELY(expandForStroke
46            && (!transform.isPureTranslate() || recordedOp.paint->getStrokeWidth() < 1.0f))) {
47        // account for hairline stroke when stroke may be < 1 scaled pixel
48        // Non translate || strokeWidth < 1 is conservative, but will cover all cases
49        clippedBounds.outset(0.5f);
50    }
51
52    // resolvedClipRect = intersect(parentMatrix * localClip, parentClip)
53    clipState = snapshot.mutateClipArea().serializeIntersectedClip(allocator,
54            recordedOp.localClip, *(snapshot.transform));
55    LOG_ALWAYS_FATAL_IF(!clipState, "must clip!");
56
57    const Rect& clipRect = clipState->rect;
58    if (CC_UNLIKELY(clipRect.isEmpty() || !clippedBounds.intersects(clipRect))) {
59        // Rejected based on either empty clip, or bounds not intersecting with clip
60
61        // Note: we could rewind the clipState object in situations where the clipRect is empty,
62        // but *only* if the caching logic within ClipArea was aware of the rewind.
63        clipState = nullptr;
64        clippedBounds.setEmpty();
65    } else {
66        // Not rejected! compute true clippedBounds, clipSideFlags, and path mask
67        clipSideFlags = computeClipSideFlags(clipRect, clippedBounds);
68        clippedBounds.doIntersect(clipRect);
69
70        if (CC_UNLIKELY(snapshot.projectionPathMask)) {
71            // map projection path mask from render target space into op space,
72            // so intersection with op geometry is possible
73            Matrix4 inverseTransform;
74            inverseTransform.loadInverse(transform);
75            SkMatrix skInverseTransform;
76            inverseTransform.copyTo(skInverseTransform);
77
78            auto localMask = allocator.create<SkPath>();
79            snapshot.projectionPathMask->transform(skInverseTransform, localMask);
80            localProjectionPathMask = localMask;
81        }
82    }
83}
84
85ResolvedRenderState::ResolvedRenderState(LinearAllocator& allocator, Snapshot& snapshot,
86        const Matrix4& localTransform, const ClipBase* localClip) {
87    transform.loadMultiply(*snapshot.transform, localTransform);
88    clipState = snapshot.mutateClipArea().serializeIntersectedClip(allocator,
89            localClip, *(snapshot.transform));
90    clippedBounds = clipState->rect;
91    clipSideFlags = OpClipSideFlags::Full;
92    localProjectionPathMask = nullptr;
93}
94
95ResolvedRenderState::ResolvedRenderState(LinearAllocator& allocator, Snapshot& snapshot)
96        : transform(*snapshot.transform)
97        , clipState(snapshot.mutateClipArea().serializeClip(allocator))
98        , clippedBounds(clipState->rect)
99        , clipSideFlags(OpClipSideFlags::Full)
100        , localProjectionPathMask(nullptr) {}
101
102ResolvedRenderState::ResolvedRenderState(const ClipRect* clipRect, const Rect& dstRect)
103        : transform(Matrix4::identity())
104        , clipState(clipRect)
105        , clippedBounds(dstRect)
106        , clipSideFlags(computeClipSideFlags(clipRect->rect, dstRect))
107        , localProjectionPathMask(nullptr) {
108    clippedBounds.doIntersect(clipRect->rect);
109}
110
111BakedOpState* BakedOpState::tryConstruct(LinearAllocator& allocator,
112        Snapshot& snapshot, const RecordedOp& recordedOp) {
113    if (CC_UNLIKELY(snapshot.getRenderTargetClip().isEmpty())) return nullptr;
114    BakedOpState* bakedState = allocator.create_trivial<BakedOpState>(
115            allocator, snapshot, recordedOp, false);
116    if (bakedState->computedState.clippedBounds.isEmpty()) {
117        // bounds are empty, so op is rejected
118        allocator.rewindIfLastAlloc(bakedState);
119        return nullptr;
120    }
121    return bakedState;
122}
123
124BakedOpState* BakedOpState::tryConstructUnbounded(LinearAllocator& allocator,
125        Snapshot& snapshot, const RecordedOp& recordedOp) {
126    if (CC_UNLIKELY(snapshot.getRenderTargetClip().isEmpty())) return nullptr;
127    return allocator.create_trivial<BakedOpState>(allocator, snapshot, recordedOp);
128}
129
130BakedOpState* BakedOpState::tryStrokeableOpConstruct(LinearAllocator& allocator,
131        Snapshot& snapshot, const RecordedOp& recordedOp, StrokeBehavior strokeBehavior) {
132    if (CC_UNLIKELY(snapshot.getRenderTargetClip().isEmpty())) return nullptr;
133    bool expandForStroke = (strokeBehavior == StrokeBehavior::StyleDefined)
134            ? (recordedOp.paint && recordedOp.paint->getStyle() != SkPaint::kFill_Style)
135            : true;
136
137    BakedOpState* bakedState = allocator.create_trivial<BakedOpState>(
138           allocator, snapshot, recordedOp, expandForStroke);
139    if (bakedState->computedState.clippedBounds.isEmpty()) {
140        // bounds are empty, so op is rejected
141        // NOTE: this won't succeed if a clip was allocated
142        allocator.rewindIfLastAlloc(bakedState);
143        return nullptr;
144    }
145    return bakedState;
146}
147
148BakedOpState* BakedOpState::tryShadowOpConstruct(LinearAllocator& allocator,
149        Snapshot& snapshot, const ShadowOp* shadowOpPtr) {
150    if (CC_UNLIKELY(snapshot.getRenderTargetClip().isEmpty())) return nullptr;
151
152    // clip isn't empty, so construct the op
153    return allocator.create_trivial<BakedOpState>(allocator, snapshot, shadowOpPtr);
154}
155
156BakedOpState* BakedOpState::directConstruct(LinearAllocator& allocator,
157        const ClipRect* clip, const Rect& dstRect, const RecordedOp& recordedOp) {
158    return allocator.create_trivial<BakedOpState>(clip, dstRect, recordedOp);
159}
160
161void BakedOpState::setupOpacity(const SkPaint* paint) {
162    computedState.opaqueOverClippedBounds = computedState.transform.isSimple()
163            && computedState.clipState->mode == ClipMode::Rectangle
164            && MathUtils::areEqual(alpha, 1.0f)
165            && !roundRectClipState
166            && PaintUtils::isOpaquePaint(paint);
167}
168
169} // namespace uirenderer
170} // namespace android
171