gfx/layers/ipc/ShadowLayerUtilsX11.cpp@97036ab72558 (annotated)
gfx/layers/ipc/ShadowLayerUtilsX11.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * vim: sw=2 ts=8 et : |
| michael@0 | 3 | */ |
| michael@0 | 4 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "ShadowLayerUtilsX11.h" |
| michael@0 | 9 | #include <X11/X.h> // for Drawable, XID |
| michael@0 | 10 | #include <X11/Xlib.h> // for Display, Visual, etc |
| michael@0 | 11 | #include <X11/extensions/Xrender.h> // for XRenderPictFormat, etc |
| michael@0 | 12 | #include <X11/extensions/render.h> // for PictFormat |
| michael@0 | 13 | #include "cairo-xlib.h" |
| michael@0 | 14 | #include <stdint.h> // for uint32_t |
| michael@0 | 15 | #include "GLDefs.h" // for GLenum |
| michael@0 | 16 | #include "gfxPlatform.h" // for gfxPlatform |
| michael@0 | 17 | #include "gfxXlibSurface.h" // for gfxXlibSurface |
| michael@0 | 18 | #include "gfx2DGlue.h" // for Moz2D transistion helpers |
| michael@0 | 19 | #include "mozilla/X11Util.h" // for DefaultXDisplay, FinishX, etc |
| michael@0 | 20 | #include "mozilla/gfx/Point.h" // for IntSize |
| michael@0 | 21 | #include "mozilla/layers/CompositableForwarder.h" |
| michael@0 | 22 | #include "mozilla/layers/CompositorTypes.h" // for OpenMode |
| michael@0 | 23 | #include "mozilla/layers/ISurfaceAllocator.h" // for ISurfaceAllocator, etc |
| michael@0 | 24 | #include "mozilla/layers/LayerManagerComposite.h" |
| michael@0 | 25 | #include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor, etc |
| michael@0 | 26 | #include "mozilla/layers/ShadowLayers.h" // for ShadowLayerForwarder, etc |
| michael@0 | 27 | #include "mozilla/mozalloc.h" // for operator new |
| michael@0 | 28 | #include "nsAutoPtr.h" // for nsRefPtr |
| michael@0 | 29 | #include "nsCOMPtr.h" // for already_AddRefed |
| michael@0 | 30 | #include "nsDebug.h" // for NS_ERROR |
| michael@0 | 31 | #include "prenv.h" // for PR_GetEnv |
| michael@0 | 32 | |
| michael@0 | 33 | using namespace mozilla::gl; |
| michael@0 | 34 | |
| michael@0 | 35 | namespace mozilla { |
| michael@0 | 36 | namespace gl { |
| michael@0 | 37 | class GLContext; |
| michael@0 | 38 | class TextureImage; |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | namespace layers { |
| michael@0 | 42 | |
| michael@0 | 43 | // Return true if we're likely compositing using X and so should use |
| michael@0 | 44 | // Xlib surfaces in shadow layers. |
| michael@0 | 45 | static bool |
| michael@0 | 46 | UsingXCompositing() |
| michael@0 | 47 | { |
| michael@0 | 48 | if (!PR_GetEnv("MOZ_LAYERS_ENABLE_XLIB_SURFACES")) { |
| michael@0 | 49 | return false; |
| michael@0 | 50 | } |
| michael@0 | 51 | return (gfxSurfaceType::Xlib == |
| michael@0 | 52 | gfxPlatform::GetPlatform()->ScreenReferenceSurface()->GetType()); |
| michael@0 | 53 | } |
| michael@0 | 54 | |
| michael@0 | 55 | // LookReturn a pointer to |aFormat| that lives in the Xrender library. |
| michael@0 | 56 | // All code using render formats assumes it doesn't need to copy. |
| michael@0 | 57 | static XRenderPictFormat* |
| michael@0 | 58 | GetXRenderPictFormatFromId(Display* aDisplay, PictFormat aFormatId) |
| michael@0 | 59 | { |
| michael@0 | 60 | XRenderPictFormat tmplate; |
| michael@0 | 61 | tmplate.id = aFormatId; |
| michael@0 | 62 | return XRenderFindFormat(aDisplay, PictFormatID, &tmplate, 0); |
| michael@0 | 63 | } |
| michael@0 | 64 | |
| michael@0 | 65 | SurfaceDescriptorX11::SurfaceDescriptorX11(gfxXlibSurface* aSurf) |
| michael@0 | 66 | : mId(aSurf->XDrawable()) |
| michael@0 | 67 | , mSize(aSurf->GetSize().ToIntSize()) |
| michael@0 | 68 | { |
| michael@0 | 69 | const XRenderPictFormat *pictFormat = aSurf->XRenderFormat(); |
| michael@0 | 70 | if (pictFormat) { |
| michael@0 | 71 | mFormat = pictFormat->id; |
| michael@0 | 72 | } else { |
| michael@0 | 73 | mFormat = cairo_xlib_surface_get_visual(aSurf->CairoSurface())->visualid; |
| michael@0 | 74 | } |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | SurfaceDescriptorX11::SurfaceDescriptorX11(Drawable aDrawable, XID aFormatID, |
| michael@0 | 78 | const gfx::IntSize& aSize) |
| michael@0 | 79 | : mId(aDrawable) |
| michael@0 | 80 | , mFormat(aFormatID) |
| michael@0 | 81 | , mSize(aSize) |
| michael@0 | 82 | { } |
| michael@0 | 83 | |
| michael@0 | 84 | already_AddRefed<gfxXlibSurface> |
| michael@0 | 85 | SurfaceDescriptorX11::OpenForeign() const |
| michael@0 | 86 | { |
| michael@0 | 87 | Display* display = DefaultXDisplay(); |
| michael@0 | 88 | Screen* screen = DefaultScreenOfDisplay(display); |
| michael@0 | 89 | |
| michael@0 | 90 | nsRefPtr<gfxXlibSurface> surf; |
| michael@0 | 91 | XRenderPictFormat* pictFormat = GetXRenderPictFormatFromId(display, mFormat); |
| michael@0 | 92 | if (pictFormat) { |
| michael@0 | 93 | surf = new gfxXlibSurface(screen, mId, pictFormat, gfx::ThebesIntSize(mSize)); |
| michael@0 | 94 | } else { |
| michael@0 | 95 | Visual* visual; |
| michael@0 | 96 | int depth; |
| michael@0 | 97 | FindVisualAndDepth(display, mFormat, &visual, &depth); |
| michael@0 | 98 | if (!visual) |
| michael@0 | 99 | return nullptr; |
| michael@0 | 100 | |
| michael@0 | 101 | surf = new gfxXlibSurface(display, mId, visual, gfx::ThebesIntSize(mSize)); |
| michael@0 | 102 | } |
| michael@0 | 103 | return surf->CairoStatus() ? nullptr : surf.forget(); |
| michael@0 | 104 | } |
| michael@0 | 105 | |
| michael@0 | 106 | /*static*/ void |
| michael@0 | 107 | ShadowLayerForwarder::PlatformSyncBeforeUpdate() |
| michael@0 | 108 | { |
| michael@0 | 109 | if (UsingXCompositing()) { |
| michael@0 | 110 | // If we're using X surfaces, then we need to finish all pending |
| michael@0 | 111 | // operations on the back buffers before handing them to the |
| michael@0 | 112 | // parent, otherwise the surface might be used by the parent's |
| michael@0 | 113 | // Display in between two operations queued by our Display. |
| michael@0 | 114 | FinishX(DefaultXDisplay()); |
| michael@0 | 115 | } |
| michael@0 | 116 | } |
| michael@0 | 117 | |
| michael@0 | 118 | /*static*/ void |
| michael@0 | 119 | LayerManagerComposite::PlatformSyncBeforeReplyUpdate() |
| michael@0 | 120 | { |
| michael@0 | 121 | if (UsingXCompositing()) { |
| michael@0 | 122 | // If we're using X surfaces, we need to finish all pending |
| michael@0 | 123 | // operations on the *front buffers* before handing them back to |
| michael@0 | 124 | // the child, even though they will be read operations. |
| michael@0 | 125 | // Otherwise, the child might start scribbling on new back buffers |
| michael@0 | 126 | // that are still participating in requests as old front buffers. |
| michael@0 | 127 | FinishX(DefaultXDisplay()); |
| michael@0 | 128 | } |
| michael@0 | 129 | } |
| michael@0 | 130 | |
| michael@0 | 131 | /*static*/ bool |
| michael@0 | 132 | LayerManagerComposite::SupportsDirectTexturing() |
| michael@0 | 133 | { |
| michael@0 | 134 | return false; |
| michael@0 | 135 | } |
| michael@0 | 136 | |
| michael@0 | 137 | } // namespace layers |
| michael@0 | 138 | } // namespace mozilla |
