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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 <SkCanvas.h>
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors
///////////////////////////////////////////////////////////////////////////////
Snapshot::Snapshot(): flags(0), previous(NULL), layer(NULL), fbo(0),
invisible(false), empty(false), alpha(1.0f) {
transform = &mTransformRoot;
clipRect = &mClipRectRoot;
region = NULL;
clipRegion = NULL;
}
/**
* Copies the specified snapshot/ The specified snapshot is stored as
* the previous snapshot.
*/
Snapshot::Snapshot(const sp<Snapshot>& s, int saveFlags):
flags(0), previous(s), layer(NULL), fbo(s->fbo),
invisible(s->invisible), empty(false),
viewport(s->viewport), height(s->height), alpha(s->alpha) {
clipRegion = NULL;
if (saveFlags & SkCanvas::kMatrix_SaveFlag) {
mTransformRoot.load(*s->transform);
transform = &mTransformRoot;
} else {
transform = s->transform;
}
if (saveFlags & SkCanvas::kClip_SaveFlag) {
mClipRectRoot.set(*s->clipRect);
clipRect = &mClipRectRoot;
#if STENCIL_BUFFER_SIZE
if (s->clipRegion) {
mClipRegionRoot.op(*s->clipRegion, SkRegion::kUnion_Op);
clipRegion = &mClipRegionRoot;
}
#endif
} else {
clipRect = s->clipRect;
#if STENCIL_BUFFER_SIZE
clipRegion = s->clipRegion;
#endif
}
if (s->flags & Snapshot::kFlagFboTarget) {
flags |= Snapshot::kFlagFboTarget;
region = s->region;
} else {
region = NULL;
}
#ifdef QCOM_HARDWARE
mTileClip.set(s->getTileClip());
#endif
}
///////////////////////////////////////////////////////////////////////////////
// Clipping
///////////////////////////////////////////////////////////////////////////////
void Snapshot::ensureClipRegion() {
#if STENCIL_BUFFER_SIZE
if (!clipRegion) {
clipRegion = &mClipRegionRoot;
clipRegion->setRect(clipRect->left, clipRect->top, clipRect->right, clipRect->bottom);
}
#endif
}
void Snapshot::copyClipRectFromRegion() {
#if STENCIL_BUFFER_SIZE
if (!clipRegion->isEmpty()) {
const SkIRect& bounds = clipRegion->getBounds();
clipRect->set(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom);
if (clipRegion->isRect()) {
clipRegion->setEmpty();
clipRegion = NULL;
}
} else {
clipRect->setEmpty();
clipRegion = NULL;
}
#endif
}
bool Snapshot::clipRegionOp(float left, float top, float right, float bottom, SkRegion::Op op) {
#if STENCIL_BUFFER_SIZE
SkIRect tmp;
tmp.set(left, top, right, bottom);
clipRegion->op(tmp, op);
copyClipRectFromRegion();
return true;
#else
return false;
#endif
}
bool Snapshot::clip(float left, float top, float right, float bottom, SkRegion::Op op) {
Rect r(left, top, right, bottom);
transform->mapRect(r);
return clipTransformed(r, op);
}
bool Snapshot::clipTransformed(const Rect& r, SkRegion::Op op) {
bool clipped = false;
switch (op) {
case SkRegion::kIntersect_Op: {
if (CC_UNLIKELY(clipRegion)) {
clipped = clipRegionOp(r.left, r.top, r.right, r.bottom, SkRegion::kIntersect_Op);
} else {
clipped = clipRect->intersect(r);
if (!clipped) {
clipRect->setEmpty();
clipped = true;
}
}
break;
}
case SkRegion::kUnion_Op: {
if (CC_UNLIKELY(clipRegion)) {
clipped = clipRegionOp(r.left, r.top, r.right, r.bottom, SkRegion::kUnion_Op);
} else {
clipped = clipRect->unionWith(r);
}
break;
}
case SkRegion::kReplace_Op: {
setClip(r.left, r.top, r.right, r.bottom);
clipped = true;
break;
}
default: {
ensureClipRegion();
clipped = clipRegionOp(r.left, r.top, r.right, r.bottom, op);
break;
}
}
if (clipped) {
flags |= Snapshot::kFlagClipSet;
}
return clipped;
}
void Snapshot::setClip(float left, float top, float right, float bottom) {
clipRect->set(left, top, right, bottom);
#if STENCIL_BUFFER_SIZE
if (clipRegion) {
clipRegion->setEmpty();
clipRegion = NULL;
}
#endif
flags |= Snapshot::kFlagClipSet;
}
bool Snapshot::hasPerspectiveTransform() const {
return transform->isPerspective();
}
const Rect& Snapshot::getLocalClip() {
mat4 inverse;
inverse.loadInverse(*transform);
mLocalClip.set(*clipRect);
inverse.mapRect(mLocalClip);
return mLocalClip;
}
#ifdef QCOM_HARDWARE
void Snapshot::setTileClip(float left, float top, float right, float bottom) {
mTileClip.set(left, top, right, bottom);
}
const Rect& Snapshot::getTileClip() {
return mTileClip;
}
#endif
void Snapshot::resetClip(float left, float top, float right, float bottom) {
clipRect = &mClipRectRoot;
setClip(left, top, right, bottom);
}
///////////////////////////////////////////////////////////////////////////////
// Transforms
///////////////////////////////////////////////////////////////////////////////
void Snapshot::resetTransform(float x, float y, float z) {
transform = &mTransformRoot;
transform->loadTranslate(x, y, z);
}
///////////////////////////////////////////////////////////////////////////////
// Queries
///////////////////////////////////////////////////////////////////////////////
bool Snapshot::isIgnored() const {
return invisible || empty;
}
}; // namespace uirenderer
}; // namespace android
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