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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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This commit is contained in:
Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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64
widget/gtk/WindowSurfaceX11.cpp Normal file
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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 "WindowSurfaceX11.h"
#include "gfxPlatform.h"
#include "X11UndefineNone.h"
namespace mozilla {
namespace widget {
WindowSurfaceX11::WindowSurfaceX11(Display* aDisplay,
Window aWindow,
Visual* aVisual,
unsigned int aDepth)
: mDisplay(aDisplay)
, mWindow(aWindow)
, mVisual(aVisual)
, mDepth(aDepth)
, mFormat(GetVisualFormat(aVisual, aDepth))
{
}
/* static */
gfx::SurfaceFormat
WindowSurfaceX11::GetVisualFormat(const Visual* aVisual, unsigned int aDepth)
{
switch (aDepth) {
case 32:
if (aVisual->red_mask == 0xff0000 &&
aVisual->green_mask == 0xff00 &&
aVisual->blue_mask == 0xff) {
return gfx::SurfaceFormat::B8G8R8A8;
}
break;
case 24:
// Only support the BGRX layout, and report it as BGRA to the compositor.
// The alpha channel will be discarded when we put the image.
// Cairo/pixman lacks some fast paths for compositing BGRX onto BGRA, so
// just report it as BGRX directly in that case.
if (aVisual->red_mask == 0xff0000 &&
aVisual->green_mask == 0xff00 &&
aVisual->blue_mask == 0xff) {
gfx::BackendType backend = gfxPlatform::GetPlatform()->GetDefaultContentBackend();
return backend == gfx::BackendType::CAIRO ? gfx::SurfaceFormat::B8G8R8X8
: gfx::SurfaceFormat::B8G8R8A8;
}
break;
case 16:
if (aVisual->red_mask == 0xf800 &&
aVisual->green_mask == 0x07e0 &&
aVisual->blue_mask == 0x1f) {
return gfx::SurfaceFormat::R5G6B5_UINT16;
}
break;
}
return gfx::SurfaceFormat::UNKNOWN;
}
} // namespace widget
} // namespace mozilla