forked from mirrors/gecko-dev
64 lines
2 KiB
C++
64 lines
2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 "WindowSurfaceX11.h"
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#include "gfxPlatform.h"
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#include "X11UndefineNone.h"
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namespace mozilla {
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namespace widget {
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WindowSurfaceX11::WindowSurfaceX11(Display* aDisplay,
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Window aWindow,
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Visual* aVisual,
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unsigned int aDepth)
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: mDisplay(aDisplay)
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, mWindow(aWindow)
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, mVisual(aVisual)
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, mDepth(aDepth)
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, mFormat(GetVisualFormat(aVisual, aDepth))
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{
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}
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/* static */
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gfx::SurfaceFormat
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WindowSurfaceX11::GetVisualFormat(const Visual* aVisual, unsigned int aDepth)
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{
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switch (aDepth) {
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case 32:
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if (aVisual->red_mask == 0xff0000 &&
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aVisual->green_mask == 0xff00 &&
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aVisual->blue_mask == 0xff) {
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return gfx::SurfaceFormat::B8G8R8A8;
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}
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break;
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case 24:
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// Only support the BGRX layout, and report it as BGRA to the compositor.
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// The alpha channel will be discarded when we put the image.
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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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if (aVisual->red_mask == 0xff0000 &&
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aVisual->green_mask == 0xff00 &&
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aVisual->blue_mask == 0xff) {
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gfx::BackendType backend = gfxPlatform::GetPlatform()->GetDefaultContentBackend();
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return backend == gfx::BackendType::CAIRO ? gfx::SurfaceFormat::B8G8R8X8
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: gfx::SurfaceFormat::B8G8R8A8;
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}
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break;
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case 16:
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if (aVisual->red_mask == 0xf800 &&
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aVisual->green_mask == 0x07e0 &&
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aVisual->blue_mask == 0x1f) {
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return gfx::SurfaceFormat::R5G6B5_UINT16;
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}
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break;
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}
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return gfx::SurfaceFormat::UNKNOWN;
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}
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} // namespace widget
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} // namespace mozilla
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