97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 "WindowSurfaceCairo.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Tools.h"
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#include "mozilla/gfx/gfxVars.h"
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#include "gfxPlatform.h"
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#include "gfx2DGlue.h"
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#include "nsWindow.h"
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namespace mozilla {
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namespace widget {
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using namespace mozilla::gfx;
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WindowSurfaceCairo::WindowSurfaceCairo(nsWindow* aWidget) : mWidget(aWidget) {}
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WindowSurfaceCairo::~WindowSurfaceCairo() {}
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already_AddRefed<gfx::DrawTarget> WindowSurfaceCairo::Lock(
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const LayoutDeviceIntRegion& aRegion) {
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gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
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gfx::IntSize size(bounds.XMost(), bounds.YMost());
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if (!mImageSurface || mImageSurface->CairoStatus() ||
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!(size <= mImageSurface->GetSize())) {
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mImageSurface =
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new gfxImageSurface(size, gfx::SurfaceFormat::A8R8G8B8_UINT32);
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if (mImageSurface->CairoStatus()) {
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return nullptr;
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}
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}
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gfxImageFormat format = mImageSurface->Format();
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// Cairo prefers compositing to BGRX instead of BGRA where possible.
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// Cairo/pixman lacks some fast paths for compositing BGRX onto BGRA, so
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// just report it as BGRX directly in that case.
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// Otherwise, for Skia, report it as BGRA to the compositor. The alpha
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// channel will be discarded when we put the image.
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if (format == gfx::SurfaceFormat::X8R8G8B8_UINT32) {
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gfx::BackendType backend = gfxVars::ContentBackend();
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if (!gfx::Factory::DoesBackendSupportDataDrawtarget(backend)) {
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backend = gfx::BackendType::SKIA;
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}
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if (backend != gfx::BackendType::CAIRO) {
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format = gfx::SurfaceFormat::A8R8G8B8_UINT32;
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}
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}
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return gfxPlatform::CreateDrawTargetForData(
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mImageSurface->Data(), mImageSurface->GetSize(), mImageSurface->Stride(),
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ImageFormatToSurfaceFormat(format));
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}
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void WindowSurfaceCairo::Commit(const LayoutDeviceIntRegion& aInvalidRegion) {
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if (!mImageSurface) {
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return;
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}
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// We need to paint in main thread to GtkWidget.
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NS_DispatchToMainThread(NS_NewRunnableFunction(
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"WindowSurfaceCairo::Commit", [widget = RefPtr{mWidget}, aInvalidRegion,
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surface = RefPtr{mImageSurface}]() {
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widget->SetDragPopupSurface(surface, aInvalidRegion);
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}));
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mImageSurface = nullptr;
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}
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#if 0
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void WindowSurfaceCairo::DumpToFile() {
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static int dumpSerial = 0;
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cairo_surface_t* surface = nullptr;
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auto unmap = MakeScopeExit([&] {
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if (surface) {
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cairo_surface_destroy(surface);
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}
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});
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auto size = mImageSurface->GetSize();
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surface = cairo_image_surface_create_for_data(
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(unsigned char*)mImageSurface->Data(), CAIRO_FORMAT_ARGB32,
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size.width, size.height, 4 * size.width);
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if (cairo_surface_status(surface) == CAIRO_STATUS_SUCCESS) {
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nsCString filename;
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filename.Append(nsPrintfCString("firefox-dnd-%.5d.png", dumpSerial++));
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cairo_surface_write_to_png(surface, filename.get());
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}
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}
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#endif
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} // namespace widget
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} // namespace mozilla
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