зеркало из https://github.com/mozilla/pjs.git
66 строки
1.8 KiB
C++
66 строки
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "SharedDIBSurface.h"
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#include "cairo.h"
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namespace mozilla {
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namespace gfx {
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static const cairo_user_data_key_t SHAREDDIB_KEY = {0};
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static const long kBytesPerPixel = 4;
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bool
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SharedDIBSurface::Create(HDC adc, PRUint32 aWidth, PRUint32 aHeight,
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bool aTransparent)
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{
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nsresult rv = mSharedDIB.Create(adc, aWidth, aHeight, aTransparent);
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if (NS_FAILED(rv) || !mSharedDIB.IsValid())
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return false;
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InitSurface(aWidth, aHeight, aTransparent);
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return true;
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}
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bool
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SharedDIBSurface::Attach(Handle aHandle, PRUint32 aWidth, PRUint32 aHeight,
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bool aTransparent)
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{
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nsresult rv = mSharedDIB.Attach(aHandle, aWidth, aHeight, aTransparent);
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if (NS_FAILED(rv) || !mSharedDIB.IsValid())
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return false;
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InitSurface(aWidth, aHeight, aTransparent);
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return true;
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}
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void
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SharedDIBSurface::InitSurface(PRUint32 aWidth, PRUint32 aHeight,
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bool aTransparent)
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{
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long stride = long(aWidth * kBytesPerPixel);
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unsigned char* data = reinterpret_cast<unsigned char*>(mSharedDIB.GetBits());
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gfxImageFormat format = aTransparent ? ImageFormatARGB32 : ImageFormatRGB24;
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gfxImageSurface::InitWithData(data, gfxIntSize(aWidth, aHeight),
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stride, format);
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cairo_surface_set_user_data(mSurface, &SHAREDDIB_KEY, this, NULL);
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}
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bool
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SharedDIBSurface::IsSharedDIBSurface(gfxASurface* aSurface)
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{
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return aSurface &&
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aSurface->GetType() == gfxASurface::SurfaceTypeImage &&
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aSurface->GetData(&SHAREDDIB_KEY);
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}
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} // namespace gfx
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} // namespace mozilla
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