1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/ipc/SharedDIBSurface.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,65 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "SharedDIBSurface.h"
1.10 +
1.11 +#include "cairo.h"
1.12 +
1.13 +namespace mozilla {
1.14 +namespace gfx {
1.15 +
1.16 +static const cairo_user_data_key_t SHAREDDIB_KEY = {0};
1.17 +
1.18 +static const long kBytesPerPixel = 4;
1.19 +
1.20 +bool
1.21 +SharedDIBSurface::Create(HDC adc, uint32_t aWidth, uint32_t aHeight,
1.22 + bool aTransparent)
1.23 +{
1.24 + nsresult rv = mSharedDIB.Create(adc, aWidth, aHeight, aTransparent);
1.25 + if (NS_FAILED(rv) || !mSharedDIB.IsValid())
1.26 + return false;
1.27 +
1.28 + InitSurface(aWidth, aHeight, aTransparent);
1.29 + return true;
1.30 +}
1.31 +
1.32 +bool
1.33 +SharedDIBSurface::Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,
1.34 + bool aTransparent)
1.35 +{
1.36 + nsresult rv = mSharedDIB.Attach(aHandle, aWidth, aHeight, aTransparent);
1.37 + if (NS_FAILED(rv) || !mSharedDIB.IsValid())
1.38 + return false;
1.39 +
1.40 + InitSurface(aWidth, aHeight, aTransparent);
1.41 + return true;
1.42 +}
1.43 +
1.44 +void
1.45 +SharedDIBSurface::InitSurface(uint32_t aWidth, uint32_t aHeight,
1.46 + bool aTransparent)
1.47 +{
1.48 + long stride = long(aWidth * kBytesPerPixel);
1.49 + unsigned char* data = reinterpret_cast<unsigned char*>(mSharedDIB.GetBits());
1.50 +
1.51 + gfxImageFormat format = aTransparent ? gfxImageFormat::ARGB32 : gfxImageFormat::RGB24;
1.52 +
1.53 + gfxImageSurface::InitWithData(data, gfxIntSize(aWidth, aHeight),
1.54 + stride, format);
1.55 +
1.56 + cairo_surface_set_user_data(mSurface, &SHAREDDIB_KEY, this, nullptr);
1.57 +}
1.58 +
1.59 +bool
1.60 +SharedDIBSurface::IsSharedDIBSurface(gfxASurface* aSurface)
1.61 +{
1.62 + return aSurface &&
1.63 + aSurface->GetType() == gfxSurfaceType::Image &&
1.64 + aSurface->GetData(&SHAREDDIB_KEY);
1.65 +}
1.66 +
1.67 +} // namespace gfx
1.68 +} // namespace mozilla
