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/*
* Copyright (C) 2012 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 "Snapshot.h"
#include "hwui/Canvas.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors
///////////////////////////////////////////////////////////////////////////////
Snapshot::Snapshot()
: flags(0)
, previous(nullptr)
, layer(nullptr)
, fbo(0)
, alpha(1.0f)
, roundRectClipState(nullptr)
, projectionPathMask(nullptr)
, mClipArea(&mClipAreaRoot) {
transform = &mTransformRoot;
mRelativeLightCenter.x = mRelativeLightCenter.y = mRelativeLightCenter.z = 0;
}
/**
* Copies the specified snapshot/ The specified snapshot is stored as
* the previous snapshot.
*/
Snapshot::Snapshot(Snapshot* s, int saveFlags)
: flags(0)
, previous(s)
, layer(s->layer)
, fbo(s->fbo)
, alpha(s->alpha)
, roundRectClipState(s->roundRectClipState)
, projectionPathMask(s->projectionPathMask)
, mClipArea(nullptr)
, mViewportData(s->mViewportData)
, mRelativeLightCenter(s->mRelativeLightCenter) {
if (saveFlags & SaveFlags::Matrix) {
mTransformRoot = *s->transform;
transform = &mTransformRoot;
} else {
transform = s->transform;
}
if (saveFlags & SaveFlags::Clip) {
mClipAreaRoot = s->getClipArea();
mClipArea = &mClipAreaRoot;
} else {
mClipArea = s->mClipArea;
}
}
///////////////////////////////////////////////////////////////////////////////
// Clipping
///////////////////////////////////////////////////////////////////////////////
void Snapshot::clip(const Rect& localClip, SkClipOp op) {
flags |= Snapshot::kFlagClipSet;
mClipArea->clipRectWithTransform(localClip, transform, static_cast<SkRegion::Op>(op));
}
void Snapshot::clipPath(const SkPath& path, SkClipOp op) {
flags |= Snapshot::kFlagClipSet;
mClipArea->clipPathWithTransform(path, transform, static_cast<SkRegion::Op>(op));
}
void Snapshot::setClip(float left, float top, float right, float bottom) {
flags |= Snapshot::kFlagClipSet;
mClipArea->setClip(left, top, right, bottom);
}
bool Snapshot::hasPerspectiveTransform() const {
return transform->isPerspective();
}
const Rect& Snapshot::getLocalClip() {
mat4 inverse;
inverse.loadInverse(*transform);
mLocalClip.set(mClipArea->getClipRect());
inverse.mapRect(mLocalClip);
return mLocalClip;
}
void Snapshot::resetClip(float left, float top, float right, float bottom) {
// TODO: This is incorrect, when we start rendering into a new layer,
// we may have to modify the previous snapshot's clip rect and clip
// region if the previous restore() call did not restore the clip
mClipArea = &mClipAreaRoot;
setClip(left, top, right, bottom);
}
///////////////////////////////////////////////////////////////////////////////
// Clipping round rect
///////////////////////////////////////////////////////////////////////////////
void Snapshot::setClippingRoundRect(LinearAllocator& allocator, const Rect& bounds,
float radius, bool highPriority) {
if (bounds.isEmpty()) {
mClipArea->setEmpty();
return;
}
if (roundRectClipState && roundRectClipState->highPriority) {
// ignore, don't replace, already have a high priority clip
return;
}
RoundRectClipState* state = new (allocator) RoundRectClipState;
state->highPriority = highPriority;
// store the inverse drawing matrix
Matrix4 roundRectDrawingMatrix = getOrthoMatrix();
roundRectDrawingMatrix.multiply(*transform);
state->matrix.loadInverse(roundRectDrawingMatrix);
// compute area under rounded corners - only draws overlapping these rects need to be clipped
for (int i = 0 ; i < 4; i++) {
state->dangerRects[i] = bounds;
}
state->dangerRects[0].bottom = state->dangerRects[1].bottom = bounds.top + radius;
state->dangerRects[0].right = state->dangerRects[2].right = bounds.left + radius;
state->dangerRects[1].left = state->dangerRects[3].left = bounds.right - radius;
state->dangerRects[2].top = state->dangerRects[3].top = bounds.bottom - radius;
for (int i = 0; i < 4; i++) {
transform->mapRect(state->dangerRects[i]);
// round danger rects out as though they are AA geometry (since they essentially are)
state->dangerRects[i].snapGeometryToPixelBoundaries(true);
}
// store RR area
state->innerRect = bounds;
state->innerRect.inset(radius);
state->radius = radius;
// store as immutable so, for this frame, pointer uniquely identifies this bundle of shader info
roundRectClipState = state;
}
void Snapshot::setProjectionPathMask(const SkPath* path) {
projectionPathMask = path;
}
static Snapshot* getClipRoot(Snapshot* target) {
while (target->previous && target->previous->previous) {
target = target->previous;
}
return target;
}
const ClipBase* Snapshot::serializeIntersectedClip(LinearAllocator& allocator,
const ClipBase* recordedClip, const Matrix4& recordedClipTransform) {
auto target = this;
if (CC_UNLIKELY(recordedClip && recordedClip->intersectWithRoot)) {
// Clip must be intersected with root, instead of current clip.
target = getClipRoot(this);
}
return target->mClipArea->serializeIntersectedClip(allocator,
recordedClip, recordedClipTransform);
}
void Snapshot::applyClip(const ClipBase* recordedClip, const Matrix4& transform) {
if (CC_UNLIKELY(recordedClip && recordedClip->intersectWithRoot)) {
// current clip is being replaced, but must intersect with clip root
*mClipArea = *(getClipRoot(this)->mClipArea);
}
mClipArea->applyClip(recordedClip, transform);
}
///////////////////////////////////////////////////////////////////////////////
// Queries
///////////////////////////////////////////////////////////////////////////////
void Snapshot::dump() const {
ALOGD("Snapshot %p, flags %x, prev %p, height %d, hasComplexClip %d",
this, flags, previous, getViewportHeight(), !mClipArea->isSimple());
const Rect& clipRect(mClipArea->getClipRect());
ALOGD(" ClipRect %.1f %.1f %.1f %.1f, clip simple %d",
clipRect.left, clipRect.top, clipRect.right, clipRect.bottom, mClipArea->isSimple());
ALOGD(" Transform (at %p):", transform);
transform->dump();
}
}; // namespace uirenderer
}; // namespace android
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