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