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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 "WindowSurfaceX11Image.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Tools.h"
#include "mozilla/gfx/gfxVars.h"
#include "gfxPlatform.h"
#include "gfx2DGlue.h"
#include <X11/extensions/shape.h>
namespace mozilla {
namespace widget {
using namespace mozilla::gfx;
// gfxImageSurface pixel format configuration.
#define SHAPED_IMAGE_SURFACE_BPP 4
#ifdef IS_BIG_ENDIAN
# define SHAPED_IMAGE_SURFACE_ALPHA_INDEX 0
#else
# define SHAPED_IMAGE_SURFACE_ALPHA_INDEX 3
#endif
WindowSurfaceX11Image::WindowSurfaceX11Image(Display* aDisplay, Window aWindow,
Visual* aVisual,
unsigned int aDepth)
: WindowSurfaceX11(aDisplay, aWindow, aVisual, aDepth) {}
WindowSurfaceX11Image::~WindowSurfaceX11Image() {}
already_AddRefed<gfx::DrawTarget> WindowSurfaceX11Image::Lock(
const LayoutDeviceIntRegion& aRegion) {
gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
gfx::IntSize size(bounds.XMost(), bounds.YMost());
if (!mWindowSurface || mWindowSurface->CairoStatus() ||
!(size <= mWindowSurface->GetSize())) {
mWindowSurface = new gfxXlibSurface(mDisplay, mWindow, mVisual, size);
}
if (mWindowSurface->CairoStatus()) {
return nullptr;
}
if (!mImageSurface || mImageSurface->CairoStatus() ||
!(size <= mImageSurface->GetSize())) {
gfxImageFormat format = SurfaceFormatToImageFormat(mFormat);
if (format == gfx::SurfaceFormat::UNKNOWN) {
format = mDepth == 32 ? gfx::SurfaceFormat::A8R8G8B8_UINT32
: gfx::SurfaceFormat::X8R8G8B8_UINT32;
}
mImageSurface = new gfxImageSurface(size, format);
if (mImageSurface->CairoStatus()) {
return nullptr;
}
}
gfxImageFormat format = mImageSurface->Format();
// Cairo prefers compositing to BGRX instead of BGRA where possible.
// Cairo/pixman lacks some fast paths for compositing BGRX onto BGRA, so
// just report it as BGRX directly in that case.
// Otherwise, for Skia, report it as BGRA to the compositor. The alpha
// channel will be discarded when we put the image.
if (format == gfx::SurfaceFormat::X8R8G8B8_UINT32) {
gfx::BackendType backend = gfxVars::ContentBackend();
if (!gfx::Factory::DoesBackendSupportDataDrawtarget(backend)) {
backend = gfx::BackendType::SKIA;
}
if (backend != gfx::BackendType::CAIRO) {
format = gfx::SurfaceFormat::A8R8G8B8_UINT32;
}
}
return gfxPlatform::CreateDrawTargetForData(
mImageSurface->Data(), mImageSurface->GetSize(), mImageSurface->Stride(),
ImageFormatToSurfaceFormat(format));
}
void WindowSurfaceX11Image::Commit(
const LayoutDeviceIntRegion& aInvalidRegion) {
RefPtr<gfx::DrawTarget> dt = gfx::Factory::CreateDrawTargetForCairoSurface(
mWindowSurface->CairoSurface(), mWindowSurface->GetSize());
RefPtr<gfx::SourceSurface> surf =
gfx::Factory::CreateSourceSurfaceForCairoSurface(
mImageSurface->CairoSurface(), mImageSurface->GetSize(),
mImageSurface->Format());
if (!dt || !surf) {
return;
}
gfx::IntRect bounds = aInvalidRegion.GetBounds().ToUnknownRect();
if (bounds.IsEmpty()) {
return;
}
uint32_t numRects = aInvalidRegion.GetNumRects();
if (numRects == 1) {
dt->CopySurface(surf, bounds, bounds.TopLeft());
} else {
AutoTArray<IntRect, 32> rects;
rects.SetCapacity(numRects);
for (auto iter = aInvalidRegion.RectIter(); !iter.Done(); iter.Next()) {
rects.AppendElement(iter.Get().ToUnknownRect());
}
dt->PushDeviceSpaceClipRects(rects.Elements(), rects.Length());
dt->DrawSurface(surf, gfx::Rect(bounds), gfx::Rect(bounds),
DrawSurfaceOptions(),
DrawOptions(1.0f, CompositionOp::OP_SOURCE));
dt->PopClip();
}
}
} // namespace widget
} // namespace mozilla
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