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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
#include "WindowSurfaceCairo.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Tools.h"
#include "mozilla/gfx/gfxVars.h"
#include "gfxPlatform.h"
#include "gfx2DGlue.h"
#include "nsWindow.h"
namespace mozilla {
namespace widget {
using namespace mozilla::gfx;
WindowSurfaceCairo::WindowSurfaceCairo(nsWindow* aWidget) : mWidget(aWidget) {}
WindowSurfaceCairo::~WindowSurfaceCairo() {}
already_AddRefed<gfx::DrawTarget> WindowSurfaceCairo::Lock(
const LayoutDeviceIntRegion& aRegion) {
gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
gfx::IntSize size(bounds.XMost(), bounds.YMost());
if (!mImageSurface || mImageSurface->CairoStatus() ||
!(size <= mImageSurface->GetSize())) {
mImageSurface =
new gfxImageSurface(size, gfx::SurfaceFormat::A8R8G8B8_UINT32);
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 WindowSurfaceCairo::Commit(const LayoutDeviceIntRegion& aInvalidRegion) {
if (!mImageSurface) {
return;
}
// We need to paint in main thread to GtkWidget.
NS_DispatchToMainThread(NS_NewRunnableFunction(
"WindowSurfaceCairo::Commit", [widget = RefPtr{mWidget}, aInvalidRegion,
surface = RefPtr{mImageSurface}]() {
widget->SetDragPopupSurface(surface, aInvalidRegion);
}));
mImageSurface = nullptr;
}
#if 0
void WindowSurfaceCairo::DumpToFile() {
static int dumpSerial = 0;
cairo_surface_t* surface = nullptr;
auto unmap = MakeScopeExit([&] {
if (surface) {
cairo_surface_destroy(surface);
}
});
auto size = mImageSurface->GetSize();
surface = cairo_image_surface_create_for_data(
(unsigned char*)mImageSurface->Data(), CAIRO_FORMAT_ARGB32,
size.width, size.height, 4 * size.width);
if (cairo_surface_status(surface) == CAIRO_STATUS_SUCCESS) {
nsCString filename;
filename.Append(nsPrintfCString("firefox-dnd-%.5d.png", dumpSerial++));
cairo_surface_write_to_png(surface, filename.get());
}
}
#endif
} // namespace widget
} // namespace mozilla