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