| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include "Test.h" |
| #if SK_SUPPORT_GPU |
| #include "GrClipMaskManager.h" |
| #endif |
| #include "SkClipStack.h" |
| #include "SkPath.h" |
| #include "SkRandom.h" |
| #include "SkRect.h" |
| #include "SkRegion.h" |
| |
| |
| static void test_assign_and_comparison(skiatest::Reporter* reporter) { |
| SkClipStack s; |
| bool doAA = false; |
| |
| REPORTER_ASSERT(reporter, 0 == s.getSaveCount()); |
| |
| // Build up a clip stack with a path, an empty clip, and a rect. |
| s.save(); |
| REPORTER_ASSERT(reporter, 1 == s.getSaveCount()); |
| |
| SkPath p; |
| p.moveTo(5, 6); |
| p.lineTo(7, 8); |
| p.lineTo(5, 9); |
| p.close(); |
| s.clipDevPath(p, SkRegion::kIntersect_Op, doAA); |
| |
| s.save(); |
| REPORTER_ASSERT(reporter, 2 == s.getSaveCount()); |
| |
| SkRect r = SkRect::MakeLTRB(1, 2, 3, 4); |
| s.clipDevRect(r, SkRegion::kIntersect_Op, doAA); |
| r = SkRect::MakeLTRB(10, 11, 12, 13); |
| s.clipDevRect(r, SkRegion::kIntersect_Op, doAA); |
| |
| s.save(); |
| REPORTER_ASSERT(reporter, 3 == s.getSaveCount()); |
| |
| r = SkRect::MakeLTRB(14, 15, 16, 17); |
| s.clipDevRect(r, SkRegion::kUnion_Op, doAA); |
| |
| // Test that assignment works. |
| SkClipStack copy = s; |
| REPORTER_ASSERT(reporter, s == copy); |
| |
| // Test that different save levels triggers not equal. |
| s.restore(); |
| REPORTER_ASSERT(reporter, 2 == s.getSaveCount()); |
| REPORTER_ASSERT(reporter, s != copy); |
| |
| // Test that an equal, but not copied version is equal. |
| s.save(); |
| REPORTER_ASSERT(reporter, 3 == s.getSaveCount()); |
| |
| r = SkRect::MakeLTRB(14, 15, 16, 17); |
| s.clipDevRect(r, SkRegion::kUnion_Op, doAA); |
| REPORTER_ASSERT(reporter, s == copy); |
| |
| // Test that a different op on one level triggers not equal. |
| s.restore(); |
| REPORTER_ASSERT(reporter, 2 == s.getSaveCount()); |
| s.save(); |
| REPORTER_ASSERT(reporter, 3 == s.getSaveCount()); |
| |
| r = SkRect::MakeLTRB(14, 15, 16, 17); |
| s.clipDevRect(r, SkRegion::kIntersect_Op, doAA); |
| REPORTER_ASSERT(reporter, s != copy); |
| |
| // Test that different state (clip type) triggers not equal. |
| // NO LONGER VALID: if a path contains only a rect, we turn |
| // it into a bare rect for performance reasons (working |
| // around Chromium/JavaScript bad pattern). |
| /* |
| s.restore(); |
| s.save(); |
| SkPath rp; |
| rp.addRect(r); |
| s.clipDevPath(rp, SkRegion::kUnion_Op, doAA); |
| REPORTER_ASSERT(reporter, s != copy); |
| */ |
| |
| // Test that different rects triggers not equal. |
| s.restore(); |
| REPORTER_ASSERT(reporter, 2 == s.getSaveCount()); |
| s.save(); |
| REPORTER_ASSERT(reporter, 3 == s.getSaveCount()); |
| |
| r = SkRect::MakeLTRB(24, 25, 26, 27); |
| s.clipDevRect(r, SkRegion::kUnion_Op, doAA); |
| REPORTER_ASSERT(reporter, s != copy); |
| |
| // Sanity check |
| s.restore(); |
| REPORTER_ASSERT(reporter, 2 == s.getSaveCount()); |
| |
| copy.restore(); |
| REPORTER_ASSERT(reporter, 2 == copy.getSaveCount()); |
| REPORTER_ASSERT(reporter, s == copy); |
| s.restore(); |
| REPORTER_ASSERT(reporter, 1 == s.getSaveCount()); |
| copy.restore(); |
| REPORTER_ASSERT(reporter, 1 == copy.getSaveCount()); |
| REPORTER_ASSERT(reporter, s == copy); |
| |
| // Test that different paths triggers not equal. |
| s.restore(); |
| REPORTER_ASSERT(reporter, 0 == s.getSaveCount()); |
| s.save(); |
| REPORTER_ASSERT(reporter, 1 == s.getSaveCount()); |
| |
| p.addRect(r); |
| s.clipDevPath(p, SkRegion::kIntersect_Op, doAA); |
| REPORTER_ASSERT(reporter, s != copy); |
| } |
| |
| static void assert_count(skiatest::Reporter* reporter, const SkClipStack& stack, |
| int count) { |
| SkClipStack::B2TIter iter(stack); |
| int counter = 0; |
| while (iter.next()) { |
| counter += 1; |
| } |
| REPORTER_ASSERT(reporter, count == counter); |
| } |
| |
| // Exercise the SkClipStack's bottom to top and bidirectional iterators |
| // (including the skipToTopmost functionality) |
| static void test_iterators(skiatest::Reporter* reporter) { |
| SkClipStack stack; |
| |
| static const SkRect gRects[] = { |
| { 0, 0, 40, 40 }, |
| { 60, 0, 100, 40 }, |
| { 0, 60, 40, 100 }, |
| { 60, 60, 100, 100 } |
| }; |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gRects); i++) { |
| // the union op will prevent these from being fused together |
| stack.clipDevRect(gRects[i], SkRegion::kUnion_Op, false); |
| } |
| |
| assert_count(reporter, stack, 4); |
| |
| // bottom to top iteration |
| { |
| const SkClipStack::B2TIter::Clip* clip = NULL; |
| |
| SkClipStack::B2TIter iter(stack); |
| int i; |
| |
| for (i = 0, clip = iter.next(); clip; ++i, clip = iter.next()) { |
| REPORTER_ASSERT(reporter, *clip->fRect == gRects[i]); |
| } |
| |
| SkASSERT(i == 4); |
| } |
| |
| // top to bottom iteration |
| { |
| const SkClipStack::Iter::Clip* clip = NULL; |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kTop_IterStart); |
| int i; |
| |
| for (i = 3, clip = iter.prev(); clip; --i, clip = iter.prev()) { |
| REPORTER_ASSERT(reporter, *clip->fRect == gRects[i]); |
| } |
| |
| SkASSERT(i == -1); |
| } |
| |
| // skipToTopmost |
| { |
| const SkClipStack::Iter::Clip*clip = NULL; |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| clip = iter.skipToTopmost(SkRegion::kUnion_Op); |
| REPORTER_ASSERT(reporter, *clip->fRect == gRects[3]); |
| } |
| } |
| |
| // Exercise the SkClipStack's getConservativeBounds computation |
| static void test_bounds(skiatest::Reporter* reporter, bool useRects) { |
| |
| static const int gNumCases = 20; |
| static const SkRect gAnswerRectsBW[gNumCases] = { |
| // A op B |
| { 40, 40, 50, 50 }, |
| { 10, 10, 50, 50 }, |
| { 10, 10, 80, 80 }, |
| { 10, 10, 80, 80 }, |
| { 40, 40, 80, 80 }, |
| |
| // invA op B |
| { 40, 40, 80, 80 }, |
| { 0, 0, 100, 100 }, |
| { 0, 0, 100, 100 }, |
| { 0, 0, 100, 100 }, |
| { 40, 40, 50, 50 }, |
| |
| // A op invB |
| { 10, 10, 50, 50 }, |
| { 40, 40, 50, 50 }, |
| { 0, 0, 100, 100 }, |
| { 0, 0, 100, 100 }, |
| { 0, 0, 100, 100 }, |
| |
| // invA op invB |
| { 0, 0, 100, 100 }, |
| { 40, 40, 80, 80 }, |
| { 0, 0, 100, 100 }, |
| { 10, 10, 80, 80 }, |
| { 10, 10, 50, 50 }, |
| }; |
| |
| static const SkRegion::Op gOps[] = { |
| SkRegion::kIntersect_Op, |
| SkRegion::kDifference_Op, |
| SkRegion::kUnion_Op, |
| SkRegion::kXOR_Op, |
| SkRegion::kReverseDifference_Op |
| }; |
| |
| SkRect rectA, rectB; |
| |
| rectA.iset(10, 10, 50, 50); |
| rectB.iset(40, 40, 80, 80); |
| |
| SkPath clipA, clipB; |
| |
| clipA.addRoundRect(rectA, SkIntToScalar(5), SkIntToScalar(5)); |
| clipB.addRoundRect(rectB, SkIntToScalar(5), SkIntToScalar(5)); |
| |
| SkClipStack stack; |
| SkRect devClipBound; |
| bool isIntersectionOfRects = false; |
| |
| int testCase = 0; |
| int numBitTests = useRects ? 1 : 4; |
| for (int invBits = 0; invBits < numBitTests; ++invBits) { |
| for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); ++op) { |
| |
| stack.save(); |
| bool doInvA = SkToBool(invBits & 1); |
| bool doInvB = SkToBool(invBits & 2); |
| |
| clipA.setFillType(doInvA ? SkPath::kInverseEvenOdd_FillType : |
| SkPath::kEvenOdd_FillType); |
| clipB.setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType : |
| SkPath::kEvenOdd_FillType); |
| |
| if (useRects) { |
| stack.clipDevRect(rectA, SkRegion::kIntersect_Op, false); |
| stack.clipDevRect(rectB, gOps[op], false); |
| } else { |
| stack.clipDevPath(clipA, SkRegion::kIntersect_Op, false); |
| stack.clipDevPath(clipB, gOps[op], false); |
| } |
| |
| REPORTER_ASSERT(reporter, !stack.isWideOpen()); |
| |
| stack.getConservativeBounds(0, 0, 100, 100, &devClipBound, |
| &isIntersectionOfRects); |
| |
| if (useRects) { |
| REPORTER_ASSERT(reporter, isIntersectionOfRects == |
| (gOps[op] == SkRegion::kIntersect_Op)); |
| } else { |
| REPORTER_ASSERT(reporter, !isIntersectionOfRects); |
| } |
| |
| SkASSERT(testCase < gNumCases); |
| REPORTER_ASSERT(reporter, devClipBound == gAnswerRectsBW[testCase]); |
| ++testCase; |
| |
| stack.restore(); |
| } |
| } |
| } |
| |
| // Test out 'isWideOpen' entry point |
| static void test_isWideOpen(skiatest::Reporter* reporter) { |
| |
| SkRect rectA, rectB; |
| |
| rectA.iset(10, 10, 40, 40); |
| rectB.iset(50, 50, 80, 80); |
| |
| // Stack should initially be wide open |
| { |
| SkClipStack stack; |
| |
| REPORTER_ASSERT(reporter, stack.isWideOpen()); |
| } |
| |
| // Test out case where the user specifies a union that includes everything |
| { |
| SkClipStack stack; |
| |
| SkPath clipA, clipB; |
| |
| clipA.addRoundRect(rectA, SkIntToScalar(5), SkIntToScalar(5)); |
| clipA.setFillType(SkPath::kInverseEvenOdd_FillType); |
| |
| clipB.addRoundRect(rectB, SkIntToScalar(5), SkIntToScalar(5)); |
| clipB.setFillType(SkPath::kInverseEvenOdd_FillType); |
| |
| stack.clipDevPath(clipA, SkRegion::kReplace_Op, false); |
| stack.clipDevPath(clipB, SkRegion::kUnion_Op, false); |
| |
| REPORTER_ASSERT(reporter, stack.isWideOpen()); |
| } |
| |
| // Test out union w/ a wide open clip |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(rectA, SkRegion::kUnion_Op, false); |
| |
| REPORTER_ASSERT(reporter, stack.isWideOpen()); |
| } |
| |
| // Test out empty difference from a wide open clip |
| { |
| SkClipStack stack; |
| |
| SkRect emptyRect; |
| emptyRect.setEmpty(); |
| |
| stack.clipDevRect(emptyRect, SkRegion::kDifference_Op, false); |
| |
| REPORTER_ASSERT(reporter, stack.isWideOpen()); |
| } |
| |
| // Test out return to wide open |
| { |
| SkClipStack stack; |
| |
| stack.save(); |
| |
| stack.clipDevRect(rectA, SkRegion::kReplace_Op, false); |
| |
| REPORTER_ASSERT(reporter, !stack.isWideOpen()); |
| |
| stack.restore(); |
| |
| REPORTER_ASSERT(reporter, stack.isWideOpen()); |
| } |
| } |
| |
| static int count(const SkClipStack& stack) { |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kTop_IterStart); |
| |
| const SkClipStack::Iter::Clip* clip = NULL; |
| int count = 0; |
| |
| for (clip = iter.prev(); clip; clip = iter.prev(), ++count) { |
| ; |
| } |
| |
| return count; |
| } |
| |
| // Test out SkClipStack's merging of rect clips. In particular exercise |
| // merging of aa vs. bw rects. |
| static void test_rect_merging(skiatest::Reporter* reporter) { |
| |
| SkRect overlapLeft = SkRect::MakeLTRB(10, 10, 50, 50); |
| SkRect overlapRight = SkRect::MakeLTRB(40, 40, 80, 80); |
| |
| SkRect nestedParent = SkRect::MakeLTRB(10, 10, 90, 90); |
| SkRect nestedChild = SkRect::MakeLTRB(40, 40, 60, 60); |
| |
| SkRect bound; |
| SkClipStack::BoundsType type; |
| bool isIntersectionOfRects; |
| |
| // all bw overlapping - should merge |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(overlapLeft, SkRegion::kReplace_Op, false); |
| |
| stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, false); |
| |
| REPORTER_ASSERT(reporter, 1 == count(stack)); |
| |
| stack.getBounds(&bound, &type, &isIntersectionOfRects); |
| |
| REPORTER_ASSERT(reporter, isIntersectionOfRects); |
| } |
| |
| // all aa overlapping - should merge |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(overlapLeft, SkRegion::kReplace_Op, true); |
| |
| stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, true); |
| |
| REPORTER_ASSERT(reporter, 1 == count(stack)); |
| |
| stack.getBounds(&bound, &type, &isIntersectionOfRects); |
| |
| REPORTER_ASSERT(reporter, isIntersectionOfRects); |
| } |
| |
| // mixed overlapping - should _not_ merge |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(overlapLeft, SkRegion::kReplace_Op, true); |
| |
| stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, false); |
| |
| REPORTER_ASSERT(reporter, 2 == count(stack)); |
| |
| stack.getBounds(&bound, &type, &isIntersectionOfRects); |
| |
| REPORTER_ASSERT(reporter, !isIntersectionOfRects); |
| } |
| |
| // mixed nested (bw inside aa) - should merge |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(nestedParent, SkRegion::kReplace_Op, true); |
| |
| stack.clipDevRect(nestedChild, SkRegion::kIntersect_Op, false); |
| |
| REPORTER_ASSERT(reporter, 1 == count(stack)); |
| |
| stack.getBounds(&bound, &type, &isIntersectionOfRects); |
| |
| REPORTER_ASSERT(reporter, isIntersectionOfRects); |
| } |
| |
| // mixed nested (aa inside bw) - should merge |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(nestedParent, SkRegion::kReplace_Op, false); |
| |
| stack.clipDevRect(nestedChild, SkRegion::kIntersect_Op, true); |
| |
| REPORTER_ASSERT(reporter, 1 == count(stack)); |
| |
| stack.getBounds(&bound, &type, &isIntersectionOfRects); |
| |
| REPORTER_ASSERT(reporter, isIntersectionOfRects); |
| } |
| |
| // reverse nested (aa inside bw) - should _not_ merge |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(nestedChild, SkRegion::kReplace_Op, false); |
| |
| stack.clipDevRect(nestedParent, SkRegion::kIntersect_Op, true); |
| |
| REPORTER_ASSERT(reporter, 2 == count(stack)); |
| |
| stack.getBounds(&bound, &type, &isIntersectionOfRects); |
| |
| REPORTER_ASSERT(reporter, !isIntersectionOfRects); |
| } |
| } |
| |
| |
| // This is similar to the above test but tests the iterator's ability to merge rects in the |
| // middle of a clip stack's sequence using nextCombined(). There is a save after every clip |
| // element to prevent the clip stack from merging the rectangles as they are added. |
| static void test_iter_rect_merging(skiatest::Reporter* reporter) { |
| |
| SkRect overlapLeft = SkRect::MakeLTRB(10, 10, 50, 50); |
| SkRect overlapRight = SkRect::MakeLTRB(40, 40, 80, 80); |
| |
| SkRect nestedParent = SkRect::MakeLTRB(10, 10, 90, 90); |
| SkRect nestedChild = SkRect::MakeLTRB(40, 40, 60, 60); |
| |
| SkRect farAway = SkRect::MakeLTRB(1000, 1000, 1010, 1010); |
| |
| SkRect overlapIntersect; |
| overlapIntersect.intersect(overlapLeft, overlapRight); |
| |
| SkPath path1, path2; |
| path1.addCircle(SkIntToScalar(30), SkIntToScalar(30), SkIntToScalar(1000)); |
| path2.addOval(SkRect::MakeWH(500, 600)); |
| |
| const SkClipStack::Iter::Clip* clip; |
| |
| // call nextCombined with an empty clip stack |
| { |
| SkClipStack stack; |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| REPORTER_ASSERT(reporter, NULL == iter.nextCombined()); |
| } |
| |
| // two bw overlapping - should merge, bracketed by paths |
| { |
| SkClipStack stack; |
| stack.clipDevPath(path1, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| stack.clipDevRect(overlapLeft, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| stack.clipDevPath(path2, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, *clip->fPath == path1 && !clip->fDoAA); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, !clip->fDoAA && *clip->fRect == overlapIntersect); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, *clip->fPath == path2 && !clip->fDoAA); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, NULL == clip); |
| } |
| |
| // same as above but rects are aa and no final path. |
| { |
| SkClipStack stack; |
| stack.clipDevPath(path1, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| stack.clipDevRect(overlapLeft, SkRegion::kIntersect_Op, true); stack.save(); |
| |
| stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, true); stack.save(); |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, *clip->fPath == path1 && !clip->fDoAA); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, clip->fDoAA && *clip->fRect == overlapIntersect); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, NULL == clip); |
| } |
| |
| // mixed overlapping - no paths - should _not_ merge |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(overlapLeft, SkRegion::kIntersect_Op, true); stack.save(); |
| stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, clip->fDoAA && *clip->fRect == overlapLeft); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, !clip->fDoAA && *clip->fRect == overlapRight); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, NULL == clip); |
| } |
| |
| // three rects in a row where the third rect uses a non-intersect op. |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(overlapLeft, SkRegion::kIntersect_Op, true); stack.save(); |
| stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, true); stack.save(); |
| stack.clipDevRect(nestedParent, SkRegion::kXOR_Op, true); stack.save(); |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, clip->fDoAA && *clip->fRect == overlapIntersect); |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, clip->fDoAA && *clip->fRect == nestedParent); |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, NULL == clip); |
| } |
| |
| // mixed nested (bw inside aa) - should merge |
| { |
| SkClipStack stack; |
| stack.clipDevRect(nestedParent, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| stack.clipDevRect(nestedChild, SkRegion::kIntersect_Op, true); stack.save(); |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, clip->fDoAA && *clip->fRect == nestedChild); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, NULL == clip); |
| } |
| |
| // mixed nested (aa inside bw) - should merge |
| { |
| SkClipStack stack; |
| stack.clipDevRect(nestedChild, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| stack.clipDevRect(nestedParent, SkRegion::kIntersect_Op, true); stack.save(); |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, !clip->fDoAA && *clip->fRect == nestedChild); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, NULL == clip); |
| } |
| |
| // three rect intersects in a row where result is empty after the second. |
| { |
| SkClipStack stack; |
| |
| stack.clipDevRect(overlapLeft, SkRegion::kIntersect_Op, false); stack.save(); |
| stack.clipDevRect(farAway, SkRegion::kIntersect_Op, false); stack.save(); |
| stack.clipDevRect(overlapRight, SkRegion::kIntersect_Op, false); stack.save(); |
| |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, clip->fRect->isEmpty()); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, *clip->fRect == overlapRight); |
| |
| clip = iter.nextCombined(); |
| REPORTER_ASSERT(reporter, NULL == clip); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #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::Iter::Clip& clip, SkClipStack* stack) { |
| if (NULL != clip.fPath) { |
| stack->clipDevPath(*clip.fPath, clip.fOp, clip.fDoAA); |
| } else if (NULL != clip.fRect) { |
| stack->clipDevRect(*clip.fRect, clip.fOp, clip.fDoAA); |
| } |
| } |
| |
| static void add_elem_to_region(const SkClipStack::Iter::Clip& clip, |
| const SkIRect& bounds, |
| SkRegion* region) { |
| SkRegion elemRegion; |
| SkRegion boundsRgn(bounds); |
| |
| if (NULL != clip.fPath) { |
| elemRegion.setPath(*clip.fPath, boundsRgn); |
| } else if (NULL != clip.fRect) { |
| SkPath path; |
| path.addRect(*clip.fRect); |
| elemRegion.setPath(path, boundsRgn); |
| } else { |
| // TODO: Figure out why we sometimes get here in the reduced clip stack. |
| region->setEmpty(); |
| return; |
| } |
| region->op(elemRegion, clip.fOp); |
| } |
| |
| // This can assist with debugging the clip stack reduction code when the test below fails. |
| static void print_clip(const SkClipStack::Iter::Clip& clip) { |
| static const char* kOpStrs[] = { |
| "DF", |
| "IS", |
| "UN", |
| "XR", |
| "RD", |
| "RP", |
| }; |
| if (NULL != clip.fRect || NULL != clip.fPath) { |
| const SkRect& bounds = clip.getBounds(); |
| SkDebugf("%s %s %s [%f %f] x [%f %f]\n", |
| kOpStrs[clip.fOp], |
| (NULL != clip.fRect ? "R" : "P"), |
| ((NULL != clip.fPath && clip.fPath->isInverseFillType() ? "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(); |
| } |
| } |
| |
| // Get the reduced version of the stack. |
| SkTDArray<SkClipStack::Iter::Clip> reducedClips; |
| SkRect resultBounds; |
| bool bounded; |
| GrReducedClip::InitialState initial; |
| GrReducedClip::GrReduceClipStack(stack, &reducedClips, &resultBounds, &bounded, &initial); |
| |
| // 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 (int c = 0; c < reducedClips.count(); ++c) { |
| add_elem_to_stack(reducedClips[c], &reducedStack); |
| } |
| if (bounded) { |
| // GrReduceClipStack() assumes that there is an implicit clip to the bounds |
| reducedStack.clipDevRect(resultBounds, SkRegion::kIntersect_Op, true); |
| } |
| |
| // convert both the original stack and reduced stack to SkRegions and see if they're equal |
| SkRect inflatedBounds = kBounds; |
| inflatedBounds.outset(kBounds.width() / 2, kBounds.height() / 2); |
| SkIRect inflatedIBounds; |
| inflatedBounds.roundOut(&inflatedIBounds); |
| |
| SkRegion region; |
| SkRegion reducedRegion; |
| |
| region.setRect(inflatedIBounds); |
| const SkClipStack::Iter::Clip* clip; |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); |
| while ((clip = iter.next())) { |
| add_elem_to_region(*clip, inflatedIBounds, ®ion); |
| } |
| |
| reducedRegion.setRect(inflatedIBounds); |
| iter.reset(reducedStack, SkClipStack::Iter::kBottom_IterStart); |
| while ((clip = iter.next())) { |
| add_elem_to_region(*clip, 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::B2TIter::Clip* clip = iter.next(); |
| SkRect answer; |
| answer.iset(25, 25, 75, 75); |
| |
| REPORTER_ASSERT(reporter, clip); |
| REPORTER_ASSERT(reporter, clip->fRect); |
| REPORTER_ASSERT(reporter, !clip->fPath); |
| REPORTER_ASSERT(reporter, SkRegion::kIntersect_Op == clip->fOp); |
| REPORTER_ASSERT(reporter, *clip->fRect == 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_iter_rect_merging(reporter); |
| #if SK_SUPPORT_GPU |
| test_reduced_clip_stack(reporter); |
| #endif |
| } |
| |
| #include "TestClassDef.h" |
| DEFINE_TESTCLASS("ClipStack", TestClipStackClass, TestClipStack) |