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Diffstat (limited to 'libs/ui/Region.cpp')
-rw-r--r-- | libs/ui/Region.cpp | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/libs/ui/Region.cpp b/libs/ui/Region.cpp new file mode 100644 index 0000000..3e07f2b --- /dev/null +++ b/libs/ui/Region.cpp @@ -0,0 +1,315 @@ +/* + * Copyright (C) 2007 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. + */ + +#define LOG_TAG "Region" + +#include <stdio.h> +#include <utils/Atomic.h> +#include <utils/Debug.h> +#include <utils/String8.h> +#include <ui/Region.h> +#include <corecg/SkRegion.h> +#include <corecg/SkRect.h> + +namespace android { + +// ---------------------------------------------------------------------------- + +Region::Region() +{ +} + +Region::Region(const Region& rhs) + : mRegion(rhs.mRegion) +{ +} + +Region::Region(const SkRegion& rhs) + : mRegion(rhs) +{ +} + +Region::~Region() +{ +} + +Region::Region(const Rect& rhs) +{ + set(rhs); +} + +Region::Region(const Parcel& parcel) +{ + read(parcel); +} + +Region::Region(const void* buffer) +{ + read(buffer); +} + +Region& Region::operator = (const Region& rhs) +{ + mRegion = rhs.mRegion; + return *this; +} + +const SkRegion& Region::toSkRegion() const +{ + return mRegion; +} + +Rect Region::bounds() const +{ + const SkIRect& b(mRegion.getBounds()); + return Rect(b.fLeft, b.fTop, b.fRight, b.fBottom); +} + +void Region::clear() +{ + mRegion.setEmpty(); +} + +void Region::set(const Rect& r) +{ + SkIRect ir; + ir.set(r.left, r.top, r.right, r.bottom); + mRegion.setRect(ir); +} + +// ---------------------------------------------------------------------------- + +Region& Region::orSelf(const Rect& r) +{ + SkIRect ir; + ir.set(r.left, r.top, r.right, r.bottom); + mRegion.op(ir, SkRegion::kUnion_Op); + return *this; +} + +Region& Region::andSelf(const Rect& r) +{ + SkIRect ir; + ir.set(r.left, r.top, r.right, r.bottom); + mRegion.op(ir, SkRegion::kIntersect_Op); + return *this; +} + +// ---------------------------------------------------------------------------- + +Region& Region::orSelf(const Region& rhs) { + mRegion.op(rhs.mRegion, SkRegion::kUnion_Op); + return *this; +} + +Region& Region::andSelf(const Region& rhs) { + mRegion.op(rhs.mRegion, SkRegion::kIntersect_Op); + return *this; +} + +Region& Region::subtractSelf(const Region& rhs) { + mRegion.op(rhs.mRegion, SkRegion::kDifference_Op); + return *this; +} + +Region& Region::translateSelf(int x, int y) { + if (x|y) mRegion.translate(x, y); + return *this; +} + +Region Region::merge(const Region& rhs) const { + Region result; + result.mRegion.op(mRegion, rhs.mRegion, SkRegion::kUnion_Op); + return result; +} + +Region Region::intersect(const Region& rhs) const { + Region result; + result.mRegion.op(mRegion, rhs.mRegion, SkRegion::kIntersect_Op); + return result; +} + +Region Region::subtract(const Region& rhs) const { + Region result; + result.mRegion.op(mRegion, rhs.mRegion, SkRegion::kDifference_Op); + return result; +} + +Region Region::translate(int x, int y) const { + Region result; + mRegion.translate(x, y, &result.mRegion); + return result; +} + +// ---------------------------------------------------------------------------- + +Region& Region::orSelf(const Region& rhs, int dx, int dy) { + SkRegion r(rhs.mRegion); + r.translate(dx, dy); + mRegion.op(r, SkRegion::kUnion_Op); + return *this; +} + +Region& Region::andSelf(const Region& rhs, int dx, int dy) { + SkRegion r(rhs.mRegion); + r.translate(dx, dy); + mRegion.op(r, SkRegion::kIntersect_Op); + return *this; +} + +Region& Region::subtractSelf(const Region& rhs, int dx, int dy) { + SkRegion r(rhs.mRegion); + r.translate(dx, dy); + mRegion.op(r, SkRegion::kDifference_Op); + return *this; +} + +Region Region::merge(const Region& rhs, int dx, int dy) const { + Region result; + SkRegion r(rhs.mRegion); + r.translate(dx, dy); + result.mRegion.op(mRegion, r, SkRegion::kUnion_Op); + return result; +} + +Region Region::intersect(const Region& rhs, int dx, int dy) const { + Region result; + SkRegion r(rhs.mRegion); + r.translate(dx, dy); + result.mRegion.op(mRegion, r, SkRegion::kIntersect_Op); + return result; +} + +Region Region::subtract(const Region& rhs, int dx, int dy) const { + Region result; + SkRegion r(rhs.mRegion); + r.translate(dx, dy); + result.mRegion.op(mRegion, r, SkRegion::kDifference_Op); + return result; +} + +// ---------------------------------------------------------------------------- + +Region::iterator::iterator(const Region& r) + : mIt(r.mRegion) +{ +} + +int Region::iterator::iterate(Rect* rect) +{ + if (mIt.done()) + return 0; + const SkIRect& r(mIt.rect()); + rect->left = r.fLeft; + rect->top = r.fTop; + rect->right = r.fRight; + rect->bottom= r.fBottom; + mIt.next(); + return 1; +} + +// ---------------------------------------------------------------------------- + +// we write a 4byte size ahead of the actual region, so we know how much we'll need for reading + +status_t Region::write(Parcel& parcel) const +{ + int32_t size = mRegion.flatten(NULL); + parcel.writeInt32(size); + mRegion.flatten(parcel.writeInplace(size)); + return NO_ERROR; +} + +status_t Region::read(const Parcel& parcel) +{ + size_t size = parcel.readInt32(); + mRegion.unflatten(parcel.readInplace(size)); + return NO_ERROR; +} + +ssize_t Region::write(void* buffer, size_t size) const +{ + size_t sizeNeeded = mRegion.flatten(NULL); + if (sizeNeeded > size) return NO_MEMORY; + return mRegion.flatten(buffer); +} + +ssize_t Region::read(const void* buffer) +{ + return mRegion.unflatten(buffer); +} + +ssize_t Region::writeEmpty(void* buffer, size_t size) +{ + if (size < 4) return NO_MEMORY; + // this needs to stay in sync with SkRegion + *static_cast<int32_t*>(buffer) = -1; + return 4; +} + +bool Region::isEmpty(void* buffer) +{ + // this needs to stay in sync with SkRegion + return *static_cast<int32_t*>(buffer) == -1; +} + +size_t Region::rects(Vector<Rect>& rectList) const +{ + rectList.clear(); + if (!isEmpty()) { + SkRegion::Iterator iterator(mRegion); + while( !iterator.done() ) { + const SkIRect& ir(iterator.rect()); + rectList.push(Rect(ir.fLeft, ir.fTop, ir.fRight, ir.fBottom)); + iterator.next(); + } + } + return rectList.size(); +} + +void Region::dump(String8& out, const char* what, uint32_t flags) const +{ + (void)flags; + Vector<Rect> r; + rects(r); + + size_t SIZE = 256; + char buffer[SIZE]; + + snprintf(buffer, SIZE, " Region %s (this=%p, count=%d)\n", what, this, r.size()); + out.append(buffer); + for (size_t i=0 ; i<r.size() ; i++) { + snprintf(buffer, SIZE, " [%3d, %3d, %3d, %3d]\n", + r[i].left, r[i].top,r[i].right,r[i].bottom); + out.append(buffer); + } +} + +void Region::dump(const char* what, uint32_t flags) const +{ + (void)flags; + Vector<Rect> r; + rects(r); + LOGD(" Region %s (this=%p, count=%d)\n", what, this, r.size()); + for (size_t i=0 ; i<r.size() ; i++) { + LOGD(" [%3d, %3d, %3d, %3d]\n", + r[i].left, r[i].top,r[i].right,r[i].bottom); + } +} + +// ---------------------------------------------------------------------------- + +}; // namespace android |