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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.
*/
#ifndef ANDROID_HWUI_BAKED_OP_STATE_H
#define ANDROID_HWUI_BAKED_OP_STATE_H
#include "Matrix.h"
#include "RecordedOp.h"
#include "Rect.h"
#include "Snapshot.h"
namespace android {
namespace uirenderer {
namespace OpClipSideFlags {
enum {
None = 0x0,
Left = 0x1,
Top = 0x2,
Right = 0x4,
Bottom = 0x8,
Full = 0xF,
// ConservativeFull = 0x1F needed?
};
}
/**
* Holds a list of BakedOpStates of ops that can be drawn together
*/
struct MergedBakedOpList {
const BakedOpState*const* states;
size_t count;
int clipSideFlags;
Rect clip;
};
/**
* Holds the resolved clip, transform, and bounds of a recordedOp, when replayed with a snapshot
*/
class ResolvedRenderState {
public:
ResolvedRenderState(LinearAllocator& allocator, Snapshot& snapshot,
const RecordedOp& recordedOp, bool expandForStroke);
// Constructor for unbounded ops without transform/clip (namely shadows)
ResolvedRenderState(LinearAllocator& allocator, Snapshot& snapshot);
// Constructor for primitive ops provided clip, and no transform
ResolvedRenderState(const ClipRect* viewportRect, const Rect& dstRect);
Rect computeLocalSpaceClip() const {
Matrix4 inverse;
inverse.loadInverse(transform);
Rect outClip(clipRect());
inverse.mapRect(outClip);
return outClip;
}
const Rect& clipRect() const {
return clipState->rect;
}
bool requiresClip() const {
return clipSideFlags != OpClipSideFlags::None
|| CC_UNLIKELY(clipState->mode != ClipMode::Rectangle);
}
// returns the clip if it's needed to draw the operation, otherwise nullptr
const ClipBase* getClipIfNeeded() const {
return requiresClip() ? clipState : nullptr;
}
Matrix4 transform;
const ClipBase* clipState = nullptr;
Rect clippedBounds;
int clipSideFlags = 0;
};
/**
* Self-contained op wrapper, containing all resolved state required to draw the op.
*
* Stashed pointers within all point to longer lived objects, with no ownership implied.
*/
class BakedOpState {
public:
static BakedOpState* tryConstruct(LinearAllocator& allocator,
Snapshot& snapshot, const RecordedOp& recordedOp) {
if (CC_UNLIKELY(snapshot.getRenderTargetClip().isEmpty())) return nullptr;
BakedOpState* bakedState = new (allocator) BakedOpState(
allocator, snapshot, recordedOp, false);
if (bakedState->computedState.clippedBounds.isEmpty()) {
// bounds are empty, so op is rejected
allocator.rewindIfLastAlloc(bakedState);
return nullptr;
}
return bakedState;
}
enum class StrokeBehavior {
// stroking is forced, regardless of style on paint
Forced,
// stroking is defined by style on paint
StyleDefined,
};
static BakedOpState* tryStrokeableOpConstruct(LinearAllocator& allocator,
Snapshot& snapshot, const RecordedOp& recordedOp, StrokeBehavior strokeBehavior) {
if (CC_UNLIKELY(snapshot.getRenderTargetClip().isEmpty())) return nullptr;
bool expandForStroke = (strokeBehavior == StrokeBehavior::StyleDefined)
? (recordedOp.paint && recordedOp.paint->getStyle() != SkPaint::kFill_Style)
: true;
BakedOpState* bakedState = new (allocator) BakedOpState(
allocator, snapshot, recordedOp, expandForStroke);
if (bakedState->computedState.clippedBounds.isEmpty()) {
// bounds are empty, so op is rejected
// NOTE: this won't succeed if a clip was allocated
allocator.rewindIfLastAlloc(bakedState);
return nullptr;
}
return bakedState;
}
static BakedOpState* tryShadowOpConstruct(LinearAllocator& allocator,
Snapshot& snapshot, const ShadowOp* shadowOpPtr) {
if (CC_UNLIKELY(snapshot.getRenderTargetClip().isEmpty())) return nullptr;
// clip isn't empty, so construct the op
return new (allocator) BakedOpState(allocator, snapshot, shadowOpPtr);
}
static BakedOpState* directConstruct(LinearAllocator& allocator,
const ClipRect* clip, const Rect& dstRect, const RecordedOp& recordedOp) {
return new (allocator) BakedOpState(clip, dstRect, recordedOp);
}
static void* operator new(size_t size, LinearAllocator& allocator) {
return allocator.alloc(size);
}
// computed state:
ResolvedRenderState computedState;
// simple state (straight pointer/value storage):
const float alpha;
const RoundRectClipState* roundRectClipState;
const ProjectionPathMask* projectionPathMask;
const RecordedOp* op;
private:
BakedOpState(LinearAllocator& allocator, Snapshot& snapshot,
const RecordedOp& recordedOp, bool expandForStroke)
: computedState(allocator, snapshot, recordedOp, expandForStroke)
, alpha(snapshot.alpha)
, roundRectClipState(snapshot.roundRectClipState)
, projectionPathMask(snapshot.projectionPathMask)
, op(&recordedOp) {}
BakedOpState(LinearAllocator& allocator, Snapshot& snapshot, const ShadowOp* shadowOpPtr)
: computedState(allocator, snapshot)
, alpha(snapshot.alpha)
, roundRectClipState(snapshot.roundRectClipState)
, projectionPathMask(snapshot.projectionPathMask)
, op(shadowOpPtr) {}
BakedOpState(const ClipRect* viewportRect, const Rect& dstRect, const RecordedOp& recordedOp)
: computedState(viewportRect, dstRect)
, alpha(1.0f)
, roundRectClipState(nullptr)
, projectionPathMask(nullptr)
, op(&recordedOp) {}
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_BAKED_OP_STATE_H
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