e16efc1882
git-svn-id: http://skia.googlecode.com/svn/trunk@7406 2bbb7eff-a529-9590-31e7-b0007b416f81
77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
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/*
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* Copyright 2008 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkPageFlipper.h"
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SkPageFlipper::SkPageFlipper() {
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fWidth = 0;
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fHeight = 0;
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fDirty0 = &fDirty0Storage;
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fDirty1 = &fDirty1Storage;
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fDirty0->setEmpty();
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fDirty1->setEmpty();
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}
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SkPageFlipper::SkPageFlipper(int width, int height) {
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fWidth = width;
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fHeight = height;
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fDirty0 = &fDirty0Storage;
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fDirty1 = &fDirty1Storage;
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fDirty0->setRect(0, 0, width, height);
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fDirty1->setEmpty();
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}
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void SkPageFlipper::resize(int width, int height) {
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fWidth = width;
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fHeight = height;
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// this is the opposite of the constructors
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fDirty1->setRect(0, 0, width, height);
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fDirty0->setEmpty();
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}
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void SkPageFlipper::inval() {
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fDirty1->setRect(0, 0, fWidth, fHeight);
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}
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void SkPageFlipper::inval(const SkIRect& rect) {
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SkIRect r;
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r.set(0, 0, fWidth, fHeight);
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if (r.intersect(rect)) {
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fDirty1->op(r, SkRegion::kUnion_Op);
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}
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}
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void SkPageFlipper::inval(const SkRegion& rgn) {
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SkRegion r;
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r.setRect(0, 0, fWidth, fHeight);
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if (r.op(rgn, SkRegion::kIntersect_Op)) {
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fDirty1->op(r, SkRegion::kUnion_Op);
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}
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}
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void SkPageFlipper::inval(const SkRect& rect, bool antialias) {
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SkIRect r;
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rect.round(&r);
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if (antialias) {
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r.inset(-1, -1);
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}
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this->inval(r);
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}
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const SkRegion& SkPageFlipper::update(SkRegion* copyBits) {
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// Copy over anything new from page0 that isn't dirty in page1
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copyBits->op(*fDirty0, *fDirty1, SkRegion::kDifference_Op);
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SkTSwap<SkRegion*>(fDirty0, fDirty1);
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fDirty1->setEmpty();
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return *fDirty0;
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}
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