154 lines
4.8 KiB
C++
154 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ShadowLayerUtilsX11.h"
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#include <X11/X.h> // for Drawable, XID
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#include <X11/Xlib.h> // for Display, Visual, etc
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#include <X11/extensions/Xrender.h> // for XRenderPictFormat, etc
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#include <X11/extensions/render.h> // for PictFormat
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#include "cairo-xlib.h"
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#include "X11UndefineNone.h"
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#include <stdint.h> // for uint32_t
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#include "GLDefs.h" // for GLenum
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#include "gfxPlatform.h" // for gfxPlatform
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#include "gfxXlibSurface.h" // for gfxXlibSurface
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#include "gfx2DGlue.h" // for Moz2D transistion helpers
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#include "mozilla/X11Util.h" // for DefaultXDisplay, FinishX, etc
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#include "mozilla/gfx/Point.h" // for IntSize
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#include "mozilla/layers/CompositableForwarder.h"
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#include "mozilla/layers/CompositorTypes.h" // for OpenMode
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#include "mozilla/layers/ISurfaceAllocator.h" // for ISurfaceAllocator, etc
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#include "mozilla/layers/LayerManagerComposite.h"
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#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor, etc
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#include "mozilla/layers/ShadowLayers.h" // for ShadowLayerForwarder, etc
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#include "mozilla/mozalloc.h" // for operator new
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#include "gfxEnv.h"
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#include "nsCOMPtr.h" // for already_AddRefed
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#include "nsDebug.h" // for NS_ERROR
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using namespace mozilla::gl;
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namespace mozilla {
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namespace gl {
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class GLContext;
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class TextureImage;
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}
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namespace layers {
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// Return true if we're likely compositing using X and so should use
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// Xlib surfaces in shadow layers.
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static bool
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UsingXCompositing()
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{
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if (!gfxEnv::LayersEnableXlibSurfaces()) {
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return false;
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}
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return (gfxSurfaceType::Xlib ==
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gfxPlatform::GetPlatform()->ScreenReferenceSurface()->GetType());
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}
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// LookReturn a pointer to |aFormat| that lives in the Xrender library.
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// All code using render formats assumes it doesn't need to copy.
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static XRenderPictFormat*
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GetXRenderPictFormatFromId(Display* aDisplay, PictFormat aFormatId)
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{
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XRenderPictFormat tmplate;
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tmplate.id = aFormatId;
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return XRenderFindFormat(aDisplay, PictFormatID, &tmplate, 0);
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}
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SurfaceDescriptorX11::SurfaceDescriptorX11(gfxXlibSurface* aSurf,
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bool aForwardGLX)
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: mId(aSurf->XDrawable())
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, mSize(aSurf->GetSize())
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, mGLXPixmap(X11None)
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{
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const XRenderPictFormat *pictFormat = aSurf->XRenderFormat();
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if (pictFormat) {
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mFormat = pictFormat->id;
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} else {
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mFormat = cairo_xlib_surface_get_visual(aSurf->CairoSurface())->visualid;
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}
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#ifdef GL_PROVIDER_GLX
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if (aForwardGLX) {
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mGLXPixmap = aSurf->GetGLXPixmap();
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}
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#endif
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}
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SurfaceDescriptorX11::SurfaceDescriptorX11(Drawable aDrawable, XID aFormatID,
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const gfx::IntSize& aSize)
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: mId(aDrawable)
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, mFormat(aFormatID)
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, mSize(aSize)
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, mGLXPixmap(X11None)
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{ }
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already_AddRefed<gfxXlibSurface>
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SurfaceDescriptorX11::OpenForeign() const
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{
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Display* display = DefaultXDisplay();
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Screen* screen = DefaultScreenOfDisplay(display);
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RefPtr<gfxXlibSurface> surf;
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XRenderPictFormat* pictFormat = GetXRenderPictFormatFromId(display, mFormat);
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if (pictFormat) {
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surf = new gfxXlibSurface(screen, mId, pictFormat, mSize);
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} else {
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Visual* visual;
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int depth;
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FindVisualAndDepth(display, mFormat, &visual, &depth);
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if (!visual)
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return nullptr;
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surf = new gfxXlibSurface(display, mId, visual, mSize);
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}
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#ifdef GL_PROVIDER_GLX
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if (mGLXPixmap)
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surf->BindGLXPixmap(mGLXPixmap);
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#endif
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return surf->CairoStatus() ? nullptr : surf.forget();
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}
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/*static*/ void
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ShadowLayerForwarder::PlatformSyncBeforeUpdate()
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{
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if (UsingXCompositing()) {
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// If we're using X surfaces, then we need to finish all pending
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// operations on the back buffers before handing them to the
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// parent, otherwise the surface might be used by the parent's
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// Display in between two operations queued by our Display.
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FinishX(DefaultXDisplay());
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}
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}
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/*static*/ void
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LayerManagerComposite::PlatformSyncBeforeReplyUpdate()
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{
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if (UsingXCompositing()) {
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// If we're using X surfaces, we need to finish all pending
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// operations on the *front buffers* before handing them back to
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// the child, even though they will be read operations.
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// Otherwise, the child might start scribbling on new back buffers
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// that are still participating in requests as old front buffers.
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FinishX(DefaultXDisplay());
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}
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}
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/*static*/ bool
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LayerManagerComposite::SupportsDirectTexturing()
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{
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return false;
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}
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} // namespace layers
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} // namespace mozilla
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