1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/layers/ipc/ShadowLayerUtilsX11.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,138 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * vim: sw=2 ts=8 et :
1.6 + */
1.7 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.10 +
1.11 +#include "ShadowLayerUtilsX11.h"
1.12 +#include <X11/X.h> // for Drawable, XID
1.13 +#include <X11/Xlib.h> // for Display, Visual, etc
1.14 +#include <X11/extensions/Xrender.h> // for XRenderPictFormat, etc
1.15 +#include <X11/extensions/render.h> // for PictFormat
1.16 +#include "cairo-xlib.h"
1.17 +#include <stdint.h> // for uint32_t
1.18 +#include "GLDefs.h" // for GLenum
1.19 +#include "gfxPlatform.h" // for gfxPlatform
1.20 +#include "gfxXlibSurface.h" // for gfxXlibSurface
1.21 +#include "gfx2DGlue.h" // for Moz2D transistion helpers
1.22 +#include "mozilla/X11Util.h" // for DefaultXDisplay, FinishX, etc
1.23 +#include "mozilla/gfx/Point.h" // for IntSize
1.24 +#include "mozilla/layers/CompositableForwarder.h"
1.25 +#include "mozilla/layers/CompositorTypes.h" // for OpenMode
1.26 +#include "mozilla/layers/ISurfaceAllocator.h" // for ISurfaceAllocator, etc
1.27 +#include "mozilla/layers/LayerManagerComposite.h"
1.28 +#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor, etc
1.29 +#include "mozilla/layers/ShadowLayers.h" // for ShadowLayerForwarder, etc
1.30 +#include "mozilla/mozalloc.h" // for operator new
1.31 +#include "nsAutoPtr.h" // for nsRefPtr
1.32 +#include "nsCOMPtr.h" // for already_AddRefed
1.33 +#include "nsDebug.h" // for NS_ERROR
1.34 +#include "prenv.h" // for PR_GetEnv
1.35 +
1.36 +using namespace mozilla::gl;
1.37 +
1.38 +namespace mozilla {
1.39 +namespace gl {
1.40 +class GLContext;
1.41 +class TextureImage;
1.42 +}
1.43 +
1.44 +namespace layers {
1.45 +
1.46 +// Return true if we're likely compositing using X and so should use
1.47 +// Xlib surfaces in shadow layers.
1.48 +static bool
1.49 +UsingXCompositing()
1.50 +{
1.51 + if (!PR_GetEnv("MOZ_LAYERS_ENABLE_XLIB_SURFACES")) {
1.52 + return false;
1.53 + }
1.54 + return (gfxSurfaceType::Xlib ==
1.55 + gfxPlatform::GetPlatform()->ScreenReferenceSurface()->GetType());
1.56 +}
1.57 +
1.58 +// LookReturn a pointer to |aFormat| that lives in the Xrender library.
1.59 +// All code using render formats assumes it doesn't need to copy.
1.60 +static XRenderPictFormat*
1.61 +GetXRenderPictFormatFromId(Display* aDisplay, PictFormat aFormatId)
1.62 +{
1.63 + XRenderPictFormat tmplate;
1.64 + tmplate.id = aFormatId;
1.65 + return XRenderFindFormat(aDisplay, PictFormatID, &tmplate, 0);
1.66 +}
1.67 +
1.68 +SurfaceDescriptorX11::SurfaceDescriptorX11(gfxXlibSurface* aSurf)
1.69 + : mId(aSurf->XDrawable())
1.70 + , mSize(aSurf->GetSize().ToIntSize())
1.71 +{
1.72 + const XRenderPictFormat *pictFormat = aSurf->XRenderFormat();
1.73 + if (pictFormat) {
1.74 + mFormat = pictFormat->id;
1.75 + } else {
1.76 + mFormat = cairo_xlib_surface_get_visual(aSurf->CairoSurface())->visualid;
1.77 + }
1.78 +}
1.79 +
1.80 +SurfaceDescriptorX11::SurfaceDescriptorX11(Drawable aDrawable, XID aFormatID,
1.81 + const gfx::IntSize& aSize)
1.82 + : mId(aDrawable)
1.83 + , mFormat(aFormatID)
1.84 + , mSize(aSize)
1.85 +{ }
1.86 +
1.87 +already_AddRefed<gfxXlibSurface>
1.88 +SurfaceDescriptorX11::OpenForeign() const
1.89 +{
1.90 + Display* display = DefaultXDisplay();
1.91 + Screen* screen = DefaultScreenOfDisplay(display);
1.92 +
1.93 + nsRefPtr<gfxXlibSurface> surf;
1.94 + XRenderPictFormat* pictFormat = GetXRenderPictFormatFromId(display, mFormat);
1.95 + if (pictFormat) {
1.96 + surf = new gfxXlibSurface(screen, mId, pictFormat, gfx::ThebesIntSize(mSize));
1.97 + } else {
1.98 + Visual* visual;
1.99 + int depth;
1.100 + FindVisualAndDepth(display, mFormat, &visual, &depth);
1.101 + if (!visual)
1.102 + return nullptr;
1.103 +
1.104 + surf = new gfxXlibSurface(display, mId, visual, gfx::ThebesIntSize(mSize));
1.105 + }
1.106 + return surf->CairoStatus() ? nullptr : surf.forget();
1.107 +}
1.108 +
1.109 +/*static*/ void
1.110 +ShadowLayerForwarder::PlatformSyncBeforeUpdate()
1.111 +{
1.112 + if (UsingXCompositing()) {
1.113 + // If we're using X surfaces, then we need to finish all pending
1.114 + // operations on the back buffers before handing them to the
1.115 + // parent, otherwise the surface might be used by the parent's
1.116 + // Display in between two operations queued by our Display.
1.117 + FinishX(DefaultXDisplay());
1.118 + }
1.119 +}
1.120 +
1.121 +/*static*/ void
1.122 +LayerManagerComposite::PlatformSyncBeforeReplyUpdate()
1.123 +{
1.124 + if (UsingXCompositing()) {
1.125 + // If we're using X surfaces, we need to finish all pending
1.126 + // operations on the *front buffers* before handing them back to
1.127 + // the child, even though they will be read operations.
1.128 + // Otherwise, the child might start scribbling on new back buffers
1.129 + // that are still participating in requests as old front buffers.
1.130 + FinishX(DefaultXDisplay());
1.131 + }
1.132 +}
1.133 +
1.134 +/*static*/ bool
1.135 +LayerManagerComposite::SupportsDirectTexturing()
1.136 +{
1.137 + return false;
1.138 +}
1.139 +
1.140 +} // namespace layers
1.141 +} // namespace mozilla
