306ab9d5de
git-svn-id: http://skia.googlecode.com/svn/trunk@6774 2bbb7eff-a529-9590-31e7-b0007b416f81
962 lines
30 KiB
C++
962 lines
30 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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#if SK_SUPPORT_GPU
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#include "GrReducedClip.h"
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#endif
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#include "SkClipStack.h"
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#include "SkPath.h"
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#include "SkRandom.h"
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#include "SkRect.h"
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#include "SkRegion.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::Element* element = NULL;
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SkClipStack::B2TIter iter(stack);
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int i;
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for (i = 0, element = iter.next(); element; ++i, element = iter.next()) {
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REPORTER_ASSERT(reporter, SkClipStack::Element::kRect_Type == element->getType());
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REPORTER_ASSERT(reporter, element->getRect() == 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::Element* element = 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, element = iter.prev(); element; --i, element = iter.prev()) {
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REPORTER_ASSERT(reporter, SkClipStack::Element::kRect_Type == element->getType());
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REPORTER_ASSERT(reporter, element->getRect() == 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::Element* element = NULL;
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SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart);
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element = iter.skipToTopmost(SkRegion::kUnion_Op);
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REPORTER_ASSERT(reporter, SkClipStack::Element::kRect_Type == element->getType());
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REPORTER_ASSERT(reporter, element->getRect() == 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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static int count(const SkClipStack& stack) {
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SkClipStack::Iter iter(stack, SkClipStack::Iter::kTop_IterStart);
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const SkClipStack::Element* element = NULL;
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int count = 0;
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for (element = iter.prev(); element; element = 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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static void test_rect_inverse_fill(skiatest::Reporter* reporter) {
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// non-intersecting rectangles
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SkRect rect = SkRect::MakeLTRB(0, 0, 10, 10);
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SkPath path;
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path.addRect(rect);
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path.toggleInverseFillType();
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SkClipStack stack;
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stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
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SkRect bounds;
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SkClipStack::BoundsType boundsType;
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stack.getBounds(&bounds, &boundsType);
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REPORTER_ASSERT(reporter, SkClipStack::kInsideOut_BoundsType == boundsType);
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REPORTER_ASSERT(reporter, bounds == rect);
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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 test_quickContains(skiatest::Reporter* reporter) {
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SkRect testRect = SkRect::MakeLTRB(10, 10, 40, 40);
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SkRect insideRect = SkRect::MakeLTRB(20, 20, 30, 30);
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SkRect intersectingRect = SkRect::MakeLTRB(25, 25, 50, 50);
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SkRect outsideRect = SkRect::MakeLTRB(0, 0, 50, 50);
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SkRect nonIntersectingRect = SkRect::MakeLTRB(100, 100, 110, 110);
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SkPath insideCircle;
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insideCircle.addCircle(25, 25, 5);
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SkPath intersectingCircle;
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intersectingCircle.addCircle(25, 40, 10);
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SkPath outsideCircle;
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outsideCircle.addCircle(25, 25, 50);
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SkPath nonIntersectingCircle;
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nonIntersectingCircle.addCircle(100, 100, 5);
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{
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SkClipStack stack;
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stack.clipDevRect(outsideRect, SkRegion::kDifference_Op, false);
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// return false because quickContains currently does not care for kDifference_Op
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REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
// Replace Op tests
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevRect(outsideRect, SkRegion::kReplace_Op, false);
|
|
REPORTER_ASSERT(reporter, true == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevRect(insideRect, SkRegion::kIntersect_Op, false);
|
|
stack.save(); // To prevent in-place substitution by replace OP
|
|
stack.clipDevRect(outsideRect, SkRegion::kReplace_Op, false);
|
|
REPORTER_ASSERT(reporter, true == stack.quickContains(testRect));
|
|
stack.restore();
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevRect(outsideRect, SkRegion::kIntersect_Op, false);
|
|
stack.save(); // To prevent in-place substitution by replace OP
|
|
stack.clipDevRect(insideRect, SkRegion::kReplace_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
stack.restore();
|
|
}
|
|
|
|
// Verify proper traversal of multi-element clip
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevRect(insideRect, SkRegion::kIntersect_Op, false);
|
|
// Use a path for second clip to prevent in-place intersection
|
|
stack.clipDevPath(outsideCircle, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
// Intersect Op tests with rectangles
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevRect(outsideRect, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, true == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevRect(insideRect, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevRect(intersectingRect, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevRect(nonIntersectingRect, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
// Intersect Op tests with circle paths
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevPath(outsideCircle, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, true == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevPath(insideCircle, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevPath(intersectingCircle, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
stack.clipDevPath(nonIntersectingCircle, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
// Intersect Op tests with inverse filled rectangles
|
|
{
|
|
SkClipStack stack;
|
|
SkPath path;
|
|
path.addRect(outsideRect);
|
|
path.toggleInverseFillType();
|
|
stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
SkPath path;
|
|
path.addRect(insideRect);
|
|
path.toggleInverseFillType();
|
|
stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
SkPath path;
|
|
path.addRect(intersectingRect);
|
|
path.toggleInverseFillType();
|
|
stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
SkPath path;
|
|
path.addRect(nonIntersectingRect);
|
|
path.toggleInverseFillType();
|
|
stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, true == stack.quickContains(testRect));
|
|
}
|
|
|
|
// Intersect Op tests with inverse filled circles
|
|
{
|
|
SkClipStack stack;
|
|
SkPath path = outsideCircle;
|
|
path.toggleInverseFillType();
|
|
stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
SkPath path = insideCircle;
|
|
path.toggleInverseFillType();
|
|
stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
SkPath path = intersectingCircle;
|
|
path.toggleInverseFillType();
|
|
stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, false == stack.quickContains(testRect));
|
|
}
|
|
|
|
{
|
|
SkClipStack stack;
|
|
SkPath path = nonIntersectingCircle;
|
|
path.toggleInverseFillType();
|
|
stack.clipDevPath(path, SkRegion::kIntersect_Op, false);
|
|
REPORTER_ASSERT(reporter, true == stack.quickContains(testRect));
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#if SK_SUPPORT_GPU
|
|
// Functions that add a shape to the clip stack. The shape is computed from a rectangle.
|
|
// AA is always disabled since the clip stack reducer can cause changes in aa rasterization of the
|
|
// stack. A fractional edge repeated in different elements may be rasterized fewer times using the
|
|
// reduced stack.
|
|
typedef void (*AddElementFunc) (const SkRect& rect,
|
|
bool invert,
|
|
SkRegion::Op op,
|
|
SkClipStack* stack);
|
|
|
|
static void add_round_rect(const SkRect& rect, bool invert, SkRegion::Op op, SkClipStack* stack) {
|
|
SkPath path;
|
|
SkScalar rx = rect.width() / 10;
|
|
SkScalar ry = rect.height() / 20;
|
|
path.addRoundRect(rect, rx, ry);
|
|
if (invert) {
|
|
path.setFillType(SkPath::kInverseWinding_FillType);
|
|
}
|
|
stack->clipDevPath(path, op, false);
|
|
};
|
|
|
|
static void add_rect(const SkRect& rect, bool invert, SkRegion::Op op, SkClipStack* stack) {
|
|
if (invert) {
|
|
SkPath path;
|
|
path.addRect(rect);
|
|
path.setFillType(SkPath::kInverseWinding_FillType);
|
|
stack->clipDevPath(path, op, false);
|
|
} else {
|
|
stack->clipDevRect(rect, op, false);
|
|
}
|
|
};
|
|
|
|
static void add_oval(const SkRect& rect, bool invert, SkRegion::Op op, SkClipStack* stack) {
|
|
SkPath path;
|
|
path.addOval(rect);
|
|
if (invert) {
|
|
path.setFillType(SkPath::kInverseWinding_FillType);
|
|
}
|
|
stack->clipDevPath(path, op, false);
|
|
};
|
|
|
|
static void add_elem_to_stack(const SkClipStack::Element& element, SkClipStack* stack) {
|
|
switch (element.getType()) {
|
|
case SkClipStack::Element::kRect_Type:
|
|
stack->clipDevRect(element.getRect(), element.getOp(), element.isAA());
|
|
break;
|
|
case SkClipStack::Element::kPath_Type:
|
|
stack->clipDevPath(element.getPath(), element.getOp(), element.isAA());
|
|
break;
|
|
case SkClipStack::Element::kEmpty_Type:
|
|
SkDEBUGFAIL("Why did the reducer produce an explicit empty.");
|
|
stack->clipEmpty();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void add_elem_to_region(const SkClipStack::Element& element,
|
|
const SkIRect& bounds,
|
|
SkRegion* region) {
|
|
SkRegion elemRegion;
|
|
SkRegion boundsRgn(bounds);
|
|
|
|
switch (element.getType()) {
|
|
case SkClipStack::Element::kRect_Type: {
|
|
SkPath path;
|
|
path.addRect(element.getRect());
|
|
elemRegion.setPath(path, boundsRgn);
|
|
break;
|
|
}
|
|
case SkClipStack::Element::kPath_Type:
|
|
elemRegion.setPath(element.getPath(), boundsRgn);
|
|
break;
|
|
case SkClipStack::Element::kEmpty_Type:
|
|
//
|
|
region->setEmpty();
|
|
return;
|
|
}
|
|
region->op(elemRegion, element.getOp());
|
|
}
|
|
|
|
// This can assist with debugging the clip stack reduction code when the test below fails.
|
|
static void print_clip(const SkClipStack::Element& element) {
|
|
static const char* kOpStrs[] = {
|
|
"DF",
|
|
"IS",
|
|
"UN",
|
|
"XR",
|
|
"RD",
|
|
"RP",
|
|
};
|
|
if (SkClipStack::Element::kEmpty_Type != element.getType()) {
|
|
const SkRect& bounds = element.getBounds();
|
|
bool isRect = SkClipStack::Element::kRect_Type == element.getType();
|
|
SkDebugf("%s %s %s [%f %f] x [%f %f]\n",
|
|
kOpStrs[element.getOp()],
|
|
(isRect ? "R" : "P"),
|
|
(element.isInverseFilled() ? "I" : " "),
|
|
bounds.fLeft, bounds.fRight, bounds.fTop, bounds.fBottom);
|
|
} else {
|
|
SkDebugf("EM\n");
|
|
}
|
|
}
|
|
|
|
static void test_reduced_clip_stack(skiatest::Reporter* reporter) {
|
|
// We construct random clip stacks, reduce them, and then rasterize both versions to verify that
|
|
// they are equal.
|
|
|
|
// All the clip elements will be contained within these bounds.
|
|
static const SkRect kBounds = SkRect::MakeWH(100, 100);
|
|
|
|
enum {
|
|
kNumTests = 200,
|
|
kMinElemsPerTest = 1,
|
|
kMaxElemsPerTest = 50,
|
|
};
|
|
|
|
// min/max size of a clip element as a fraction of kBounds.
|
|
static const SkScalar kMinElemSizeFrac = SK_Scalar1 / 5;
|
|
static const SkScalar kMaxElemSizeFrac = SK_Scalar1;
|
|
|
|
static const SkRegion::Op kOps[] = {
|
|
SkRegion::kDifference_Op,
|
|
SkRegion::kIntersect_Op,
|
|
SkRegion::kUnion_Op,
|
|
SkRegion::kXOR_Op,
|
|
SkRegion::kReverseDifference_Op,
|
|
SkRegion::kReplace_Op,
|
|
};
|
|
|
|
// Replace operations short-circuit the optimizer. We want to make sure that we test this code
|
|
// path a little bit but we don't want it to prevent us from testing many longer traversals in
|
|
// the optimizer.
|
|
static const int kReplaceDiv = 4 * kMaxElemsPerTest;
|
|
|
|
// We want to test inverse fills. However, they are quite rare in practice so don't over do it.
|
|
static const SkScalar kFractionInverted = SK_Scalar1 / kMaxElemsPerTest;
|
|
|
|
static const AddElementFunc kElementFuncs[] = {
|
|
add_rect,
|
|
add_round_rect,
|
|
add_oval,
|
|
};
|
|
|
|
SkRandom r;
|
|
|
|
for (int i = 0; i < kNumTests; ++i) {
|
|
// Randomly generate a clip stack.
|
|
SkClipStack stack;
|
|
int numElems = r.nextRangeU(kMinElemsPerTest, kMaxElemsPerTest);
|
|
for (int e = 0; e < numElems; ++e) {
|
|
SkRegion::Op op = kOps[r.nextULessThan(SK_ARRAY_COUNT(kOps))];
|
|
if (op == SkRegion::kReplace_Op) {
|
|
if (r.nextU() % kReplaceDiv) {
|
|
--e;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// saves can change the clip stack behavior when an element is added.
|
|
bool doSave = r.nextBool();
|
|
|
|
SkSize size = SkSize::Make(
|
|
SkScalarFloorToScalar(SkScalarMul(kBounds.width(), r.nextRangeScalar(kMinElemSizeFrac, kMaxElemSizeFrac))),
|
|
SkScalarFloorToScalar(SkScalarMul(kBounds.height(), r.nextRangeScalar(kMinElemSizeFrac, kMaxElemSizeFrac))));
|
|
|
|
SkPoint xy = {SkScalarFloorToScalar(r.nextRangeScalar(kBounds.fLeft, kBounds.fRight - size.fWidth)),
|
|
SkScalarFloorToScalar(r.nextRangeScalar(kBounds.fTop, kBounds.fBottom - size.fHeight))};
|
|
|
|
SkRect rect = SkRect::MakeXYWH(xy.fX, xy.fY, size.fWidth, size.fHeight);
|
|
|
|
bool invert = r.nextBiasedBool(kFractionInverted);
|
|
kElementFuncs[r.nextULessThan(SK_ARRAY_COUNT(kElementFuncs))](rect, invert, op, &stack);
|
|
if (doSave) {
|
|
stack.save();
|
|
}
|
|
}
|
|
|
|
SkRect inflatedBounds = kBounds;
|
|
inflatedBounds.outset(kBounds.width() / 2, kBounds.height() / 2);
|
|
SkIRect inflatedIBounds;
|
|
inflatedBounds.roundOut(&inflatedIBounds);
|
|
|
|
typedef GrReducedClip::ElementList ElementList;
|
|
// Get the reduced version of the stack.
|
|
ElementList reducedClips;
|
|
|
|
GrReducedClip::InitialState initial;
|
|
SkIRect tBounds;
|
|
SkIRect* tightBounds = r.nextBool() ? &tBounds : NULL;
|
|
GrReducedClip::ReduceClipStack(stack,
|
|
inflatedIBounds,
|
|
&reducedClips,
|
|
&initial,
|
|
tightBounds);
|
|
|
|
// Build a new clip stack based on the reduced clip elements
|
|
SkClipStack reducedStack;
|
|
if (GrReducedClip::kAllOut_InitialState == initial) {
|
|
// whether the result is bounded or not, the whole plane should start outside the clip.
|
|
reducedStack.clipEmpty();
|
|
}
|
|
for (ElementList::Iter iter = reducedClips.headIter(); NULL != iter.get(); iter.next()) {
|
|
add_elem_to_stack(*iter.get(), &reducedStack);
|
|
}
|
|
|
|
// GrReducedClipStack assumes that the final result is clipped to the returned bounds
|
|
if (NULL != tightBounds) {
|
|
reducedStack.clipDevRect(*tightBounds, SkRegion::kIntersect_Op);
|
|
}
|
|
|
|
// convert both the original stack and reduced stack to SkRegions and see if they're equal
|
|
SkRegion region;
|
|
SkRegion reducedRegion;
|
|
|
|
region.setRect(inflatedIBounds);
|
|
const SkClipStack::Element* element;
|
|
SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart);
|
|
while ((element = iter.next())) {
|
|
add_elem_to_region(*element, inflatedIBounds, ®ion);
|
|
}
|
|
|
|
reducedRegion.setRect(inflatedIBounds);
|
|
iter.reset(reducedStack, SkClipStack::Iter::kBottom_IterStart);
|
|
while ((element = iter.next())) {
|
|
add_elem_to_region(*element, inflatedIBounds, &reducedRegion);
|
|
}
|
|
|
|
REPORTER_ASSERT(reporter, region == reducedRegion);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
static void TestClipStack(skiatest::Reporter* reporter) {
|
|
SkClipStack stack;
|
|
|
|
REPORTER_ASSERT(reporter, 0 == stack.getSaveCount());
|
|
assert_count(reporter, stack, 0);
|
|
|
|
static const SkIRect gRects[] = {
|
|
{ 0, 0, 100, 100 },
|
|
{ 25, 25, 125, 125 },
|
|
{ 0, 0, 1000, 1000 },
|
|
{ 0, 0, 75, 75 }
|
|
};
|
|
for (size_t i = 0; i < SK_ARRAY_COUNT(gRects); i++) {
|
|
stack.clipDevRect(gRects[i], SkRegion::kIntersect_Op);
|
|
}
|
|
|
|
// all of the above rects should have been intersected, leaving only 1 rect
|
|
SkClipStack::B2TIter iter(stack);
|
|
const SkClipStack::Element* element = iter.next();
|
|
SkRect answer;
|
|
answer.iset(25, 25, 75, 75);
|
|
|
|
REPORTER_ASSERT(reporter, NULL != element);
|
|
REPORTER_ASSERT(reporter, SkClipStack::Element::kRect_Type == element->getType());
|
|
REPORTER_ASSERT(reporter, SkRegion::kIntersect_Op == element->getOp());
|
|
REPORTER_ASSERT(reporter, element->getRect() == answer);
|
|
// now check that we only had one in our iterator
|
|
REPORTER_ASSERT(reporter, !iter.next());
|
|
|
|
stack.reset();
|
|
REPORTER_ASSERT(reporter, 0 == stack.getSaveCount());
|
|
assert_count(reporter, stack, 0);
|
|
|
|
test_assign_and_comparison(reporter);
|
|
test_iterators(reporter);
|
|
test_bounds(reporter, true); // once with rects
|
|
test_bounds(reporter, false); // once with paths
|
|
test_isWideOpen(reporter);
|
|
test_rect_merging(reporter);
|
|
test_rect_inverse_fill(reporter);
|
|
test_quickContains(reporter);
|
|
#if SK_SUPPORT_GPU
|
|
test_reduced_clip_stack(reporter);
|
|
#endif
|
|
}
|
|
|
|
#include "TestClassDef.h"
|
|
DEFINE_TESTCLASS("ClipStack", TestClipStackClass, TestClipStack)
|