michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * vim: sw=2 ts=8 et :
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "ShadowLayerUtilsX11.h"
michael@0: #include <X11/X.h>                      // for Drawable, XID
michael@0: #include <X11/Xlib.h>                   // for Display, Visual, etc
michael@0: #include <X11/extensions/Xrender.h>     // for XRenderPictFormat, etc
michael@0: #include <X11/extensions/render.h>      // for PictFormat
michael@0: #include "cairo-xlib.h"
michael@0: #include <stdint.h>                     // for uint32_t
michael@0: #include "GLDefs.h"                     // for GLenum
michael@0: #include "gfxPlatform.h"                // for gfxPlatform
michael@0: #include "gfxXlibSurface.h"             // for gfxXlibSurface
michael@0: #include "gfx2DGlue.h"                  // for Moz2D transistion helpers
michael@0: #include "mozilla/X11Util.h"            // for DefaultXDisplay, FinishX, etc
michael@0: #include "mozilla/gfx/Point.h"          // for IntSize
michael@0: #include "mozilla/layers/CompositableForwarder.h"
michael@0: #include "mozilla/layers/CompositorTypes.h"  // for OpenMode
michael@0: #include "mozilla/layers/ISurfaceAllocator.h"  // for ISurfaceAllocator, etc
michael@0: #include "mozilla/layers/LayerManagerComposite.h"
michael@0: #include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
michael@0: #include "mozilla/layers/ShadowLayers.h"  // for ShadowLayerForwarder, etc
michael@0: #include "mozilla/mozalloc.h"           // for operator new
michael@0: #include "nsAutoPtr.h"                  // for nsRefPtr
michael@0: #include "nsCOMPtr.h"                   // for already_AddRefed
michael@0: #include "nsDebug.h"                    // for NS_ERROR
michael@0: #include "prenv.h"                      // for PR_GetEnv
michael@0: 
michael@0: using namespace mozilla::gl;
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gl {
michael@0: class GLContext;
michael@0: class TextureImage;
michael@0: }
michael@0: 
michael@0: namespace layers {
michael@0: 
michael@0: // Return true if we're likely compositing using X and so should use
michael@0: // Xlib surfaces in shadow layers.
michael@0: static bool
michael@0: UsingXCompositing()
michael@0: {
michael@0:   if (!PR_GetEnv("MOZ_LAYERS_ENABLE_XLIB_SURFACES")) {
michael@0:       return false;
michael@0:   }
michael@0:   return (gfxSurfaceType::Xlib ==
michael@0:           gfxPlatform::GetPlatform()->ScreenReferenceSurface()->GetType());
michael@0: }
michael@0: 
michael@0: // LookReturn a pointer to |aFormat| that lives in the Xrender library.
michael@0: // All code using render formats assumes it doesn't need to copy.
michael@0: static XRenderPictFormat*
michael@0: GetXRenderPictFormatFromId(Display* aDisplay, PictFormat aFormatId)
michael@0: {
michael@0:   XRenderPictFormat tmplate;
michael@0:   tmplate.id = aFormatId;
michael@0:   return XRenderFindFormat(aDisplay, PictFormatID, &tmplate, 0);
michael@0: }
michael@0: 
michael@0: SurfaceDescriptorX11::SurfaceDescriptorX11(gfxXlibSurface* aSurf)
michael@0:   : mId(aSurf->XDrawable())
michael@0:   , mSize(aSurf->GetSize().ToIntSize())
michael@0: {
michael@0:   const XRenderPictFormat *pictFormat = aSurf->XRenderFormat();
michael@0:   if (pictFormat) {
michael@0:     mFormat = pictFormat->id;
michael@0:   } else {
michael@0:     mFormat = cairo_xlib_surface_get_visual(aSurf->CairoSurface())->visualid;
michael@0:   }
michael@0: }
michael@0: 
michael@0: SurfaceDescriptorX11::SurfaceDescriptorX11(Drawable aDrawable, XID aFormatID,
michael@0:                                            const gfx::IntSize& aSize)
michael@0:   : mId(aDrawable)
michael@0:   , mFormat(aFormatID)
michael@0:   , mSize(aSize)
michael@0: { }
michael@0: 
michael@0: already_AddRefed<gfxXlibSurface>
michael@0: SurfaceDescriptorX11::OpenForeign() const
michael@0: {
michael@0:   Display* display = DefaultXDisplay();
michael@0:   Screen* screen = DefaultScreenOfDisplay(display);
michael@0: 
michael@0:   nsRefPtr<gfxXlibSurface> surf;
michael@0:   XRenderPictFormat* pictFormat = GetXRenderPictFormatFromId(display, mFormat);
michael@0:   if (pictFormat) {
michael@0:     surf = new gfxXlibSurface(screen, mId, pictFormat, gfx::ThebesIntSize(mSize));
michael@0:   } else {
michael@0:     Visual* visual;
michael@0:     int depth;
michael@0:     FindVisualAndDepth(display, mFormat, &visual, &depth);
michael@0:     if (!visual)
michael@0:       return nullptr;
michael@0: 
michael@0:     surf = new gfxXlibSurface(display, mId, visual, gfx::ThebesIntSize(mSize));
michael@0:   }
michael@0:   return surf->CairoStatus() ? nullptr : surf.forget();
michael@0: }
michael@0: 
michael@0: /*static*/ void
michael@0: ShadowLayerForwarder::PlatformSyncBeforeUpdate()
michael@0: {
michael@0:   if (UsingXCompositing()) {
michael@0:     // If we're using X surfaces, then we need to finish all pending
michael@0:     // operations on the back buffers before handing them to the
michael@0:     // parent, otherwise the surface might be used by the parent's
michael@0:     // Display in between two operations queued by our Display.
michael@0:     FinishX(DefaultXDisplay());
michael@0:   }
michael@0: }
michael@0: 
michael@0: /*static*/ void
michael@0: LayerManagerComposite::PlatformSyncBeforeReplyUpdate()
michael@0: {
michael@0:   if (UsingXCompositing()) {
michael@0:     // If we're using X surfaces, we need to finish all pending
michael@0:     // operations on the *front buffers* before handing them back to
michael@0:     // the child, even though they will be read operations.
michael@0:     // Otherwise, the child might start scribbling on new back buffers
michael@0:     // that are still participating in requests as old front buffers.
michael@0:     FinishX(DefaultXDisplay());
michael@0:   }
michael@0: }
michael@0: 
michael@0: /*static*/ bool
michael@0: LayerManagerComposite::SupportsDirectTexturing()
michael@0: {
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: } // namespace layers
michael@0: } // namespace mozilla