gfx/thebes/gfxCachedTempSurface.cpp@b8a032363ba2 (annotated)
gfx/thebes/gfxCachedTempSurface.cpp
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "gfxCachedTempSurface.h" |
| michael@0 | 7 | #include "gfxContext.h" |
| michael@0 | 8 | #include "mozilla/Attributes.h" |
| michael@0 | 9 | |
| michael@0 | 10 | class CachedSurfaceExpirationTracker MOZ_FINAL : |
| michael@0 | 11 | public nsExpirationTracker<gfxCachedTempSurface,2> { |
| michael@0 | 12 | |
| michael@0 | 13 | public: |
| michael@0 | 14 | // With K = 2, this means that surfaces will be released when they are not |
| michael@0 | 15 | // used for 1-2 seconds. |
| michael@0 | 16 | enum { TIMEOUT_MS = 1000 }; |
| michael@0 | 17 | CachedSurfaceExpirationTracker() |
| michael@0 | 18 | : nsExpirationTracker<gfxCachedTempSurface,2>(TIMEOUT_MS) {} |
| michael@0 | 19 | |
| michael@0 | 20 | ~CachedSurfaceExpirationTracker() { |
| michael@0 | 21 | AgeAllGenerations(); |
| michael@0 | 22 | } |
| michael@0 | 23 | |
| michael@0 | 24 | virtual void NotifyExpired(gfxCachedTempSurface* aSurface) { |
| michael@0 | 25 | RemoveObject(aSurface); |
| michael@0 | 26 | aSurface->Expire(); |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | static void MarkSurfaceUsed(gfxCachedTempSurface* aSurface) |
| michael@0 | 30 | { |
| michael@0 | 31 | if (aSurface->GetExpirationState()->IsTracked()) { |
| michael@0 | 32 | sExpirationTracker->MarkUsed(aSurface); |
| michael@0 | 33 | return; |
| michael@0 | 34 | } |
| michael@0 | 35 | |
| michael@0 | 36 | if (!sExpirationTracker) { |
| michael@0 | 37 | sExpirationTracker = new CachedSurfaceExpirationTracker(); |
| michael@0 | 38 | } |
| michael@0 | 39 | sExpirationTracker->AddObject(aSurface); |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | static void RemoveSurface(gfxCachedTempSurface* aSurface) |
| michael@0 | 43 | { |
| michael@0 | 44 | if (!sExpirationTracker) |
| michael@0 | 45 | return; |
| michael@0 | 46 | |
| michael@0 | 47 | if (aSurface->GetExpirationState()->IsTracked()) { |
| michael@0 | 48 | sExpirationTracker->RemoveObject(aSurface); |
| michael@0 | 49 | } |
| michael@0 | 50 | if (sExpirationTracker->IsEmpty()) { |
| michael@0 | 51 | delete sExpirationTracker; |
| michael@0 | 52 | sExpirationTracker = nullptr; |
| michael@0 | 53 | } |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | private: |
| michael@0 | 57 | static CachedSurfaceExpirationTracker* sExpirationTracker; |
| michael@0 | 58 | }; |
| michael@0 | 59 | |
| michael@0 | 60 | CachedSurfaceExpirationTracker* |
| michael@0 | 61 | CachedSurfaceExpirationTracker::sExpirationTracker = nullptr; |
| michael@0 | 62 | |
| michael@0 | 63 | gfxCachedTempSurface::~gfxCachedTempSurface() |
| michael@0 | 64 | { |
| michael@0 | 65 | CachedSurfaceExpirationTracker::RemoveSurface(this); |
| michael@0 | 66 | } |
| michael@0 | 67 | |
| michael@0 | 68 | already_AddRefed<gfxContext> |
| michael@0 | 69 | gfxCachedTempSurface::Get(gfxContentType aContentType, |
| michael@0 | 70 | const gfxRect& aRect, |
| michael@0 | 71 | gfxASurface* aSimilarTo) |
| michael@0 | 72 | { |
| michael@0 | 73 | if (mSurface) { |
| michael@0 | 74 | /* Verify the current buffer is valid for this purpose */ |
| michael@0 | 75 | if (mSize.width < aRect.width || mSize.height < aRect.height |
| michael@0 | 76 | || mSurface->GetContentType() != aContentType |
| michael@0 | 77 | || mType != aSimilarTo->GetType()) { |
| michael@0 | 78 | mSurface = nullptr; |
| michael@0 | 79 | } |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | bool cleared = false; |
| michael@0 | 83 | if (!mSurface) { |
| michael@0 | 84 | mSize = gfxIntSize(int32_t(ceil(aRect.width)), int32_t(ceil(aRect.height))); |
| michael@0 | 85 | mSurface = aSimilarTo->CreateSimilarSurface(aContentType, mSize); |
| michael@0 | 86 | if (!mSurface) |
| michael@0 | 87 | return nullptr; |
| michael@0 | 88 | |
| michael@0 | 89 | cleared = true; |
| michael@0 | 90 | mType = aSimilarTo->GetType(); |
| michael@0 | 91 | } |
| michael@0 | 92 | mSurface->SetDeviceOffset(-aRect.TopLeft()); |
| michael@0 | 93 | |
| michael@0 | 94 | nsRefPtr<gfxContext> ctx = new gfxContext(mSurface); |
| michael@0 | 95 | ctx->Rectangle(aRect); |
| michael@0 | 96 | ctx->Clip(); |
| michael@0 | 97 | if (!cleared && aContentType != gfxContentType::COLOR) { |
| michael@0 | 98 | ctx->SetOperator(gfxContext::OPERATOR_CLEAR); |
| michael@0 | 99 | ctx->Paint(); |
| michael@0 | 100 | ctx->SetOperator(gfxContext::OPERATOR_OVER); |
| michael@0 | 101 | } |
| michael@0 | 102 | |
| michael@0 | 103 | CachedSurfaceExpirationTracker::MarkSurfaceUsed(this); |
| michael@0 | 104 | |
| michael@0 | 105 | return ctx.forget(); |
| michael@0 | 106 | } |
