08eacc1447
http://codereview.appspot.com/6449079/ git-svn-id: http://skia.googlecode.com/svn/trunk@4907 2bbb7eff-a529-9590-31e7-b0007b416f81
520 lines
14 KiB
C++
520 lines
14 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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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 "Test.h"
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#include "SkClipStack.h"
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#include "SkPath.h"
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#include "SkRect.h"
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static void test_assign_and_comparison(skiatest::Reporter* reporter) {
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SkClipStack s;
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bool doAA = false;
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REPORTER_ASSERT(reporter, 0 == s.getSaveCount());
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// Build up a clip stack with a path, an empty clip, and a rect.
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s.save();
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REPORTER_ASSERT(reporter, 1 == s.getSaveCount());
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SkPath p;
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p.moveTo(5, 6);
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p.lineTo(7, 8);
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p.lineTo(5, 9);
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p.close();
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s.clipDevPath(p, SkRegion::kIntersect_Op, doAA);
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s.save();
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REPORTER_ASSERT(reporter, 2 == s.getSaveCount());
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SkRect r = SkRect::MakeLTRB(1, 2, 3, 4);
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s.clipDevRect(r, SkRegion::kIntersect_Op, doAA);
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r = SkRect::MakeLTRB(10, 11, 12, 13);
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s.clipDevRect(r, SkRegion::kIntersect_Op, doAA);
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s.save();
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REPORTER_ASSERT(reporter, 3 == s.getSaveCount());
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r = SkRect::MakeLTRB(14, 15, 16, 17);
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s.clipDevRect(r, SkRegion::kUnion_Op, doAA);
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// Test that assignment works.
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SkClipStack copy = s;
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REPORTER_ASSERT(reporter, s == copy);
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// Test that different save levels triggers not equal.
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s.restore();
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REPORTER_ASSERT(reporter, 2 == s.getSaveCount());
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REPORTER_ASSERT(reporter, s != copy);
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// Test that an equal, but not copied version is equal.
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s.save();
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REPORTER_ASSERT(reporter, 3 == s.getSaveCount());
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r = SkRect::MakeLTRB(14, 15, 16, 17);
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s.clipDevRect(r, SkRegion::kUnion_Op, doAA);
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REPORTER_ASSERT(reporter, s == copy);
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// Test that a different op on one level triggers not equal.
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s.restore();
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REPORTER_ASSERT(reporter, 2 == s.getSaveCount());
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s.save();
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REPORTER_ASSERT(reporter, 3 == s.getSaveCount());
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r = SkRect::MakeLTRB(14, 15, 16, 17);
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s.clipDevRect(r, SkRegion::kIntersect_Op, doAA);
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REPORTER_ASSERT(reporter, s != copy);
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// Test that different state (clip type) triggers not equal.
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// NO LONGER VALID: if a path contains only a rect, we turn
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// it into a bare rect for performance reasons (working
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// around Chromium/JavaScript bad pattern).
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/*
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s.restore();
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s.save();
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SkPath rp;
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rp.addRect(r);
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s.clipDevPath(rp, SkRegion::kUnion_Op, doAA);
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REPORTER_ASSERT(reporter, s != copy);
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*/
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// Test that different rects triggers not equal.
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s.restore();
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REPORTER_ASSERT(reporter, 2 == s.getSaveCount());
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s.save();
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REPORTER_ASSERT(reporter, 3 == s.getSaveCount());
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r = SkRect::MakeLTRB(24, 25, 26, 27);
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s.clipDevRect(r, SkRegion::kUnion_Op, doAA);
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REPORTER_ASSERT(reporter, s != copy);
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// Sanity check
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s.restore();
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REPORTER_ASSERT(reporter, 2 == s.getSaveCount());
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copy.restore();
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REPORTER_ASSERT(reporter, 2 == copy.getSaveCount());
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REPORTER_ASSERT(reporter, s == copy);
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s.restore();
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REPORTER_ASSERT(reporter, 1 == s.getSaveCount());
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copy.restore();
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REPORTER_ASSERT(reporter, 1 == copy.getSaveCount());
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REPORTER_ASSERT(reporter, s == copy);
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// Test that different paths triggers not equal.
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s.restore();
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REPORTER_ASSERT(reporter, 0 == s.getSaveCount());
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s.save();
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REPORTER_ASSERT(reporter, 1 == s.getSaveCount());
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p.addRect(r);
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s.clipDevPath(p, SkRegion::kIntersect_Op, doAA);
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REPORTER_ASSERT(reporter, s != copy);
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}
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static void assert_count(skiatest::Reporter* reporter, const SkClipStack& stack,
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int count) {
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SkClipStack::B2TIter iter(stack);
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int counter = 0;
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while (iter.next()) {
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counter += 1;
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}
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REPORTER_ASSERT(reporter, count == counter);
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}
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// Exercise the SkClipStack's bottom to top and bidirectional iterators
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// (including the skipToTopmost functionality)
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static void test_iterators(skiatest::Reporter* reporter) {
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SkClipStack stack;
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static const SkRect gRects[] = {
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{ 0, 0, 40, 40 },
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{ 60, 0, 100, 40 },
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{ 0, 60, 40, 100 },
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{ 60, 60, 100, 100 }
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(gRects); i++) {
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// the union op will prevent these from being fused together
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stack.clipDevRect(gRects[i], SkRegion::kUnion_Op, false);
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}
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assert_count(reporter, stack, 4);
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// bottom to top iteration
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{
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const SkClipStack::B2TIter::Clip* clip = NULL;
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SkClipStack::B2TIter iter(stack);
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int i;
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for (i = 0, clip = iter.next(); clip; ++i, clip = iter.next()) {
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REPORTER_ASSERT(reporter, *clip->fRect == gRects[i]);
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}
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SkASSERT(i == 4);
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}
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// top to bottom iteration
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{
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const SkClipStack::Iter::Clip* clip = NULL;
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SkClipStack::Iter iter(stack, SkClipStack::Iter::kTop_IterStart);
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int i;
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for (i = 3, clip = iter.prev(); clip; --i, clip = iter.prev()) {
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REPORTER_ASSERT(reporter, *clip->fRect == gRects[i]);
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}
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SkASSERT(i == -1);
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}
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// skipToTopmost
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{
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const SkClipStack::Iter::Clip*clip = NULL;
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SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart);
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clip = iter.skipToTopmost(SkRegion::kUnion_Op);
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REPORTER_ASSERT(reporter, *clip->fRect == gRects[3]);
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}
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}
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// Exercise the SkClipStack's getConservativeBounds computation
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static void test_bounds(skiatest::Reporter* reporter, bool useRects) {
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static const int gNumCases = 20;
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static const SkRect gAnswerRectsBW[gNumCases] = {
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// A op B
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{ 40, 40, 50, 50 },
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{ 10, 10, 50, 50 },
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{ 10, 10, 80, 80 },
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{ 10, 10, 80, 80 },
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{ 40, 40, 80, 80 },
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// invA op B
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{ 40, 40, 80, 80 },
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{ 0, 0, 100, 100 },
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{ 0, 0, 100, 100 },
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{ 0, 0, 100, 100 },
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{ 40, 40, 50, 50 },
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// A op invB
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{ 10, 10, 50, 50 },
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{ 40, 40, 50, 50 },
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{ 0, 0, 100, 100 },
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{ 0, 0, 100, 100 },
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{ 0, 0, 100, 100 },
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// invA op invB
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{ 0, 0, 100, 100 },
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{ 40, 40, 80, 80 },
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{ 0, 0, 100, 100 },
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{ 10, 10, 80, 80 },
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{ 10, 10, 50, 50 },
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};
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static const SkRegion::Op gOps[] = {
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SkRegion::kIntersect_Op,
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SkRegion::kDifference_Op,
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SkRegion::kUnion_Op,
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SkRegion::kXOR_Op,
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SkRegion::kReverseDifference_Op
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};
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SkRect rectA, rectB;
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rectA.iset(10, 10, 50, 50);
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rectB.iset(40, 40, 80, 80);
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SkPath clipA, clipB;
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clipA.addRoundRect(rectA, SkIntToScalar(5), SkIntToScalar(5));
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clipB.addRoundRect(rectB, SkIntToScalar(5), SkIntToScalar(5));
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SkClipStack stack;
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SkRect devClipBound;
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bool isIntersectionOfRects = false;
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int testCase = 0;
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int numBitTests = useRects ? 1 : 4;
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for (int invBits = 0; invBits < numBitTests; ++invBits) {
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for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); ++op) {
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stack.save();
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bool doInvA = SkToBool(invBits & 1);
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bool doInvB = SkToBool(invBits & 2);
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clipA.setFillType(doInvA ? SkPath::kInverseEvenOdd_FillType :
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SkPath::kEvenOdd_FillType);
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clipB.setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType :
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SkPath::kEvenOdd_FillType);
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if (useRects) {
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stack.clipDevRect(rectA, SkRegion::kIntersect_Op, false);
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stack.clipDevRect(rectB, gOps[op], false);
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} else {
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stack.clipDevPath(clipA, SkRegion::kIntersect_Op, false);
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stack.clipDevPath(clipB, gOps[op], false);
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}
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REPORTER_ASSERT(reporter, !stack.isWideOpen());
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stack.getConservativeBounds(0, 0, 100, 100, &devClipBound,
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&isIntersectionOfRects);
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if (useRects) {
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REPORTER_ASSERT(reporter, isIntersectionOfRects ==
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(gOps[op] == SkRegion::kIntersect_Op));
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} else {
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REPORTER_ASSERT(reporter, !isIntersectionOfRects);
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}
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SkASSERT(testCase < gNumCases);
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REPORTER_ASSERT(reporter, devClipBound == gAnswerRectsBW[testCase]);
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++testCase;
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stack.restore();
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}
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}
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}
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// Test out 'isWideOpen' entry point
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static void test_isWideOpen(skiatest::Reporter* reporter) {
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SkRect rectA, rectB;
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rectA.iset(10, 10, 40, 40);
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rectB.iset(50, 50, 80, 80);
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// Stack should initially be wide open
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{
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SkClipStack stack;
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REPORTER_ASSERT(reporter, stack.isWideOpen());
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}
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// Test out case where the user specifies a union that includes everything
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{
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SkClipStack stack;
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SkPath clipA, clipB;
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clipA.addRoundRect(rectA, SkIntToScalar(5), SkIntToScalar(5));
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clipA.setFillType(SkPath::kInverseEvenOdd_FillType);
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clipB.addRoundRect(rectB, SkIntToScalar(5), SkIntToScalar(5));
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clipB.setFillType(SkPath::kInverseEvenOdd_FillType);
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stack.clipDevPath(clipA, SkRegion::kReplace_Op, false);
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stack.clipDevPath(clipB, SkRegion::kUnion_Op, false);
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REPORTER_ASSERT(reporter, stack.isWideOpen());
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}
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// Test out union w/ a wide open clip
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{
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SkClipStack stack;
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stack.clipDevRect(rectA, SkRegion::kUnion_Op, false);
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REPORTER_ASSERT(reporter, stack.isWideOpen());
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}
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// Test out empty difference from a wide open clip
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{
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SkClipStack stack;
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SkRect emptyRect;
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emptyRect.setEmpty();
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stack.clipDevRect(emptyRect, SkRegion::kDifference_Op, false);
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REPORTER_ASSERT(reporter, stack.isWideOpen());
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}
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// Test out return to wide open
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{
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SkClipStack stack;
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stack.save();
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stack.clipDevRect(rectA, SkRegion::kReplace_Op, false);
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REPORTER_ASSERT(reporter, !stack.isWideOpen());
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stack.restore();
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REPORTER_ASSERT(reporter, stack.isWideOpen());
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}
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}
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int count(const SkClipStack& stack) {
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SkClipStack::Iter iter(stack, SkClipStack::Iter::kTop_IterStart);
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const SkClipStack::Iter::Clip* clip = NULL;
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int count = 0;
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for (clip = iter.prev(); clip; clip = iter.prev(), ++count) {
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;
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}
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return count;
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}
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// Test out SkClipStack's merging of rect clips. In particular exercise
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// merging of aa vs. bw rects.
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static void test_rect_merging(skiatest::Reporter* reporter) {
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SkRect overlapLeft = SkRect::MakeLTRB(10, 10, 50, 50);
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SkRect overlapRight = SkRect::MakeLTRB(40, 40, 80, 80);
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SkRect nestedParent = SkRect::MakeLTRB(10, 10, 90, 90);
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SkRect nestedChild = SkRect::MakeLTRB(40, 40, 60, 60);
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SkRect bound;
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SkClipStack::BoundsType type;
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bool isIntersectionOfRects;
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// all bw overlapping - should merge
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{
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SkClipStack stack;
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stack.clipDevRect(overlapLeft, SkRegion::kReplace_Op, false);
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stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, false);
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REPORTER_ASSERT(reporter, 1 == count(stack));
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stack.getBounds(&bound, &type, &isIntersectionOfRects);
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REPORTER_ASSERT(reporter, isIntersectionOfRects);
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}
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// all aa overlapping - should merge
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{
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SkClipStack stack;
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stack.clipDevRect(overlapLeft, SkRegion::kReplace_Op, true);
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stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, true);
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REPORTER_ASSERT(reporter, 1 == count(stack));
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stack.getBounds(&bound, &type, &isIntersectionOfRects);
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REPORTER_ASSERT(reporter, isIntersectionOfRects);
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}
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// mixed overlapping - should _not_ merge
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{
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SkClipStack stack;
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stack.clipDevRect(overlapLeft, SkRegion::kReplace_Op, true);
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stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, false);
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REPORTER_ASSERT(reporter, 2 == count(stack));
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stack.getBounds(&bound, &type, &isIntersectionOfRects);
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REPORTER_ASSERT(reporter, !isIntersectionOfRects);
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}
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// mixed nested (bw inside aa) - should merge
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{
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SkClipStack stack;
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stack.clipDevRect(nestedParent, SkRegion::kReplace_Op, true);
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stack.clipDevRect(nestedChild, SkRegion::kIntersect_Op, false);
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REPORTER_ASSERT(reporter, 1 == count(stack));
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stack.getBounds(&bound, &type, &isIntersectionOfRects);
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REPORTER_ASSERT(reporter, isIntersectionOfRects);
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}
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// mixed nested (aa inside bw) - should merge
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{
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SkClipStack stack;
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stack.clipDevRect(nestedParent, SkRegion::kReplace_Op, false);
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stack.clipDevRect(nestedChild, SkRegion::kIntersect_Op, true);
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REPORTER_ASSERT(reporter, 1 == count(stack));
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stack.getBounds(&bound, &type, &isIntersectionOfRects);
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REPORTER_ASSERT(reporter, isIntersectionOfRects);
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}
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// reverse nested (aa inside bw) - should _not_ merge
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{
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SkClipStack stack;
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stack.clipDevRect(nestedChild, SkRegion::kReplace_Op, false);
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stack.clipDevRect(nestedParent, SkRegion::kIntersect_Op, true);
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REPORTER_ASSERT(reporter, 2 == count(stack));
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stack.getBounds(&bound, &type, &isIntersectionOfRects);
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REPORTER_ASSERT(reporter, !isIntersectionOfRects);
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}
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}
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static void TestClipStack(skiatest::Reporter* reporter) {
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SkClipStack stack;
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REPORTER_ASSERT(reporter, 0 == stack.getSaveCount());
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assert_count(reporter, stack, 0);
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static const SkIRect gRects[] = {
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{ 0, 0, 100, 100 },
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{ 25, 25, 125, 125 },
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{ 0, 0, 1000, 1000 },
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{ 0, 0, 75, 75 }
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(gRects); i++) {
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stack.clipDevRect(gRects[i], SkRegion::kIntersect_Op);
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}
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// all of the above rects should have been intersected, leaving only 1 rect
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SkClipStack::B2TIter iter(stack);
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const SkClipStack::B2TIter::Clip* clip = iter.next();
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SkRect answer;
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answer.iset(25, 25, 75, 75);
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REPORTER_ASSERT(reporter, clip);
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REPORTER_ASSERT(reporter, clip->fRect);
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REPORTER_ASSERT(reporter, !clip->fPath);
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REPORTER_ASSERT(reporter, SkRegion::kIntersect_Op == clip->fOp);
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REPORTER_ASSERT(reporter, *clip->fRect == answer);
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// now check that we only had one in our iterator
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REPORTER_ASSERT(reporter, !iter.next());
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stack.reset();
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REPORTER_ASSERT(reporter, 0 == stack.getSaveCount());
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assert_count(reporter, stack, 0);
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test_assign_and_comparison(reporter);
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test_iterators(reporter);
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test_bounds(reporter, true); // once with rects
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test_bounds(reporter, false); // once with paths
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test_isWideOpen(reporter);
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test_rect_merging(reporter);
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}
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#include "TestClassDef.h"
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DEFINE_TESTCLASS("ClipStack", TestClipStackClass, TestClipStack)
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