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/*
* Copyright (C) 2015 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.
*/
#include "BakedOpState.h"
#include "ClipArea.h"
namespace android {
namespace uirenderer {
static int computeClipSideFlags(const Rect& clip, const Rect& bounds) {
int clipSideFlags = 0;
if (clip.left > bounds.left) clipSideFlags |= OpClipSideFlags::Left;
if (clip.top > bounds.top) clipSideFlags |= OpClipSideFlags::Top;
if (clip.right < bounds.right) clipSideFlags |= OpClipSideFlags::Right;
if (clip.bottom < bounds.bottom) clipSideFlags |= OpClipSideFlags::Bottom;
return clipSideFlags;
}
ResolvedRenderState::ResolvedRenderState(LinearAllocator& allocator, Snapshot& snapshot,
const RecordedOp& recordedOp, bool expandForStroke) {
// resolvedMatrix = parentMatrix * localMatrix
transform.loadMultiply(*snapshot.transform, recordedOp.localMatrix);
// resolvedClippedBounds = intersect(resolvedMatrix * opBounds, resolvedClipRect)
clippedBounds = recordedOp.unmappedBounds;
if (CC_UNLIKELY(expandForStroke)) {
// account for non-hairline stroke
clippedBounds.outset(recordedOp.paint->getStrokeWidth() * 0.5f);
}
transform.mapRect(clippedBounds);
if (CC_UNLIKELY(expandForStroke
&& (!transform.isPureTranslate() || recordedOp.paint->getStrokeWidth() < 1.0f))) {
// account for hairline stroke when stroke may be < 1 scaled pixel
// Non translate || strokeWidth < 1 is conservative, but will cover all cases
clippedBounds.outset(0.5f);
}
// resolvedClipRect = intersect(parentMatrix * localClip, parentClip)
clipState = snapshot.mutateClipArea().serializeIntersectedClip(allocator,
recordedOp.localClip, *(snapshot.transform));
LOG_ALWAYS_FATAL_IF(!clipState, "must clip!");
const Rect& clipRect = clipState->rect;
if (CC_UNLIKELY(clipRect.isEmpty() || !clippedBounds.intersects(clipRect))) {
// Rejected based on either empty clip, or bounds not intersecting with clip
// Note: we could rewind the clipState object in situations where the clipRect is empty,
// but *only* if the caching logic within ClipArea was aware of the rewind.
clipState = nullptr;
clippedBounds.setEmpty();
} else {
// Not rejected! compute true clippedBounds and clipSideFlags
clipSideFlags = computeClipSideFlags(clipRect, clippedBounds);
clippedBounds.doIntersect(clipRect);
}
}
ResolvedRenderState::ResolvedRenderState(LinearAllocator& allocator, Snapshot& snapshot)
: transform(*snapshot.transform)
, clipState(snapshot.mutateClipArea().serializeClip(allocator))
, clippedBounds(clipState->rect)
, clipSideFlags(OpClipSideFlags::Full) {}
ResolvedRenderState::ResolvedRenderState(const ClipRect* clipRect, const Rect& dstRect)
: transform(Matrix4::identity())
, clipState(clipRect)
, clippedBounds(dstRect)
, clipSideFlags(computeClipSideFlags(clipRect->rect, dstRect)) {
clippedBounds.doIntersect(clipRect->rect);
}
} // namespace uirenderer
} // namespace android
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