Line data    Source code

       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 "X11UndefineNone.h"
      15             : #include <stdint.h>                     // for uint32_t
      16             : #include "GLDefs.h"                     // for GLenum
      17             : #include "gfxPlatform.h"                // for gfxPlatform
      18             : #include "gfxXlibSurface.h"             // for gfxXlibSurface
      19             : #include "gfx2DGlue.h"                  // for Moz2D transistion helpers
      20             : #include "mozilla/X11Util.h"            // for DefaultXDisplay, FinishX, etc
      21             : #include "mozilla/gfx/Point.h"          // for IntSize
      22             : #include "mozilla/layers/CompositableForwarder.h"
      23             : #include "mozilla/layers/CompositorTypes.h"  // for OpenMode
      24             : #include "mozilla/layers/ISurfaceAllocator.h"  // for ISurfaceAllocator, etc
      25             : #include "mozilla/layers/LayerManagerComposite.h"
      26             : #include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
      27             : #include "mozilla/layers/ShadowLayers.h"  // for ShadowLayerForwarder, etc
      28             : #include "mozilla/mozalloc.h"           // for operator new
      29             : #include "gfxEnv.h"
      30             : #include "nsCOMPtr.h"                   // for already_AddRefed
      31             : #include "nsDebug.h"                    // for NS_ERROR
      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           8 : UsingXCompositing()
      47             : {
      48           8 :   if (!gfxEnv::LayersEnableXlibSurfaces()) {
      49           8 :       return false;
      50             :   }
      51             :   return (gfxSurfaceType::Xlib ==
      52           0 :           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           0 : GetXRenderPictFormatFromId(Display* aDisplay, PictFormat aFormatId)
      59             : {
      60             :   XRenderPictFormat tmplate;
      61           0 :   tmplate.id = aFormatId;
      62           0 :   return XRenderFindFormat(aDisplay, PictFormatID, &tmplate, 0);
      63             : }
      64             : 
      65           0 : SurfaceDescriptorX11::SurfaceDescriptorX11(gfxXlibSurface* aSurf,
      66           0 :                                            bool aForwardGLX)
      67           0 :   : mId(aSurf->XDrawable())
      68             :   , mSize(aSurf->GetSize())
      69           0 :   , mGLXPixmap(X11None)
      70             : {
      71           0 :   const XRenderPictFormat *pictFormat = aSurf->XRenderFormat();
      72           0 :   if (pictFormat) {
      73           0 :     mFormat = pictFormat->id;
      74             :   } else {
      75           0 :     mFormat = cairo_xlib_surface_get_visual(aSurf->CairoSurface())->visualid;
      76             :   }
      77             : 
      78             : #ifdef GL_PROVIDER_GLX
      79           0 :   if (aForwardGLX) {
      80           0 :     mGLXPixmap = aSurf->GetGLXPixmap();
      81             :   }
      82             : #endif
      83           0 : }
      84             : 
      85           0 : SurfaceDescriptorX11::SurfaceDescriptorX11(Drawable aDrawable, XID aFormatID,
      86           0 :                                            const gfx::IntSize& aSize)
      87             :   : mId(aDrawable)
      88             :   , mFormat(aFormatID)
      89             :   , mSize(aSize)
      90           0 :   , mGLXPixmap(X11None)
      91           0 : { }
      92             : 
      93             : already_AddRefed<gfxXlibSurface>
      94           0 : SurfaceDescriptorX11::OpenForeign() const
      95             : {
      96           0 :   Display* display = DefaultXDisplay();
      97           0 :   Screen* screen = DefaultScreenOfDisplay(display);
      98             : 
      99           0 :   RefPtr<gfxXlibSurface> surf;
     100           0 :   XRenderPictFormat* pictFormat = GetXRenderPictFormatFromId(display, mFormat);
     101           0 :   if (pictFormat) {
     102           0 :     surf = new gfxXlibSurface(screen, mId, pictFormat, mSize);
     103             :   } else {
     104             :     Visual* visual;
     105             :     int depth;
     106           0 :     FindVisualAndDepth(display, mFormat, &visual, &depth);
     107           0 :     if (!visual)
     108           0 :       return nullptr;
     109             : 
     110           0 :     surf = new gfxXlibSurface(display, mId, visual, mSize);
     111             :   }
     112             : 
     113             : #ifdef GL_PROVIDER_GLX
     114           0 :   if (mGLXPixmap)
     115           0 :     surf->BindGLXPixmap(mGLXPixmap);
     116             : #endif
     117             : 
     118           0 :   return surf->CairoStatus() ? nullptr : surf.forget();
     119             : }
     120             : 
     121             : /*static*/ void
     122           4 : ShadowLayerForwarder::PlatformSyncBeforeUpdate()
     123             : {
     124           4 :   if (UsingXCompositing()) {
     125             :     // If we're using X surfaces, then we need to finish all pending
     126             :     // operations on the back buffers before handing them to the
     127             :     // parent, otherwise the surface might be used by the parent's
     128             :     // Display in between two operations queued by our Display.
     129           0 :     FinishX(DefaultXDisplay());
     130             :   }
     131           4 : }
     132             : 
     133             : /*static*/ void
     134           4 : LayerManagerComposite::PlatformSyncBeforeReplyUpdate()
     135             : {
     136           4 :   if (UsingXCompositing()) {
     137             :     // If we're using X surfaces, we need to finish all pending
     138             :     // operations on the *front buffers* before handing them back to
     139             :     // the child, even though they will be read operations.
     140             :     // Otherwise, the child might start scribbling on new back buffers
     141             :     // that are still participating in requests as old front buffers.
     142           0 :     FinishX(DefaultXDisplay());
     143             :   }
     144           4 : }
     145             : 
     146             : /*static*/ bool
     147           0 : LayerManagerComposite::SupportsDirectTexturing()
     148             : {
     149           0 :   return false;
     150             : }
     151             : 
     152             : } // namespace layers
     153             : } // namespace mozilla