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comparison: layout/base/DisplayListClipState.cpp
layout/base/DisplayListClipState.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:803ba9a3d5b3 |
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| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "DisplayListClipState.h" | |
| 7 | |
| 8 #include "nsDisplayList.h" | |
| 9 | |
| 10 namespace mozilla { | |
| 11 | |
| 12 const DisplayItemClip* | |
| 13 DisplayListClipState::GetCurrentCombinedClip(nsDisplayListBuilder* aBuilder) | |
| 14 { | |
| 15 if (mCurrentCombinedClip) { | |
| 16 return mCurrentCombinedClip; | |
| 17 } | |
| 18 if (!mClipContentDescendants && !mClipContainingBlockDescendants) { | |
| 19 return nullptr; | |
| 20 } | |
| 21 if (mClipContentDescendants) { | |
| 22 if (mClipContainingBlockDescendants) { | |
| 23 DisplayItemClip intersection = *mClipContentDescendants; | |
| 24 intersection.IntersectWith(*mClipContainingBlockDescendants); | |
| 25 mCurrentCombinedClip = aBuilder->AllocateDisplayItemClip(intersection); | |
| 26 } else { | |
| 27 mCurrentCombinedClip = | |
| 28 aBuilder->AllocateDisplayItemClip(*mClipContentDescendants); | |
| 29 } | |
| 30 } else { | |
| 31 mCurrentCombinedClip = | |
| 32 aBuilder->AllocateDisplayItemClip(*mClipContainingBlockDescendants); | |
| 33 } | |
| 34 return mCurrentCombinedClip; | |
| 35 } | |
| 36 | |
| 37 void | |
| 38 DisplayListClipState::ClipContainingBlockDescendants(const nsRect& aRect, | |
| 39 const nscoord* aRadii, | |
| 40 DisplayItemClip& aClipOnStack) | |
| 41 { | |
| 42 if (aRadii) { | |
| 43 aClipOnStack.SetTo(aRect, aRadii); | |
| 44 } else { | |
| 45 aClipOnStack.SetTo(aRect); | |
| 46 } | |
| 47 if (mClipContainingBlockDescendants) { | |
| 48 aClipOnStack.IntersectWith(*mClipContainingBlockDescendants); | |
| 49 } | |
| 50 mClipContainingBlockDescendants = &aClipOnStack; | |
| 51 mCurrentCombinedClip = nullptr; | |
| 52 } | |
| 53 | |
| 54 void | |
| 55 DisplayListClipState::ClipContentDescendants(const nsRect& aRect, | |
| 56 const nscoord* aRadii, | |
| 57 DisplayItemClip& aClipOnStack) | |
| 58 { | |
| 59 if (aRadii) { | |
| 60 aClipOnStack.SetTo(aRect, aRadii); | |
| 61 } else { | |
| 62 aClipOnStack.SetTo(aRect); | |
| 63 } | |
| 64 if (mClipContentDescendants) { | |
| 65 aClipOnStack.IntersectWith(*mClipContentDescendants); | |
| 66 } | |
| 67 mClipContentDescendants = &aClipOnStack; | |
| 68 mCurrentCombinedClip = nullptr; | |
| 69 } | |
| 70 | |
| 71 void | |
| 72 DisplayListClipState::ClipContainingBlockDescendantsToContentBox(nsDisplayListBuilder* aBuilder, | |
| 73 nsIFrame* aFrame, | |
| 74 DisplayItemClip& aClipOnStack, | |
| 75 uint32_t aFlags) | |
| 76 { | |
| 77 nscoord radii[8]; | |
| 78 bool hasBorderRadius = aFrame->GetContentBoxBorderRadii(radii); | |
| 79 if (!hasBorderRadius && (aFlags & ASSUME_DRAWING_RESTRICTED_TO_CONTENT_RECT)) { | |
| 80 return; | |
| 81 } | |
| 82 | |
| 83 nsRect clipRect = aFrame->GetContentRectRelativeToSelf() + | |
| 84 aBuilder->ToReferenceFrame(aFrame); | |
| 85 // If we have a border-radius, we have to clip our content to that | |
| 86 // radius. | |
| 87 ClipContainingBlockDescendants(clipRect, hasBorderRadius ? radii : nullptr, | |
| 88 aClipOnStack); | |
| 89 } | |
| 90 | |
| 91 DisplayListClipState::AutoSaveRestore::AutoSaveRestore(nsDisplayListBuilder* aBuilder) | |
| 92 : mState(aBuilder->ClipState()) | |
| 93 , mSavedState(aBuilder->ClipState()) | |
| 94 , mClipUsed(false) | |
| 95 , mRestored(false) | |
| 96 {} | |
| 97 | |
| 98 } |
