/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* 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 "SharedDIBSurface.h" #include "cairo.h" namespace mozilla { namespace gfx { static const cairo_user_data_key_t SHAREDDIB_KEY = {0}; bool SharedDIBSurface::Create(HDC adc, uint32_t aWidth, uint32_t aHeight, bool aTransparent) { nsresult rv = mSharedDIB.Create(adc, aWidth, aHeight, aTransparent); if (NS_FAILED(rv) || !mSharedDIB.IsValid()) return false; InitSurface(aWidth, aHeight, aTransparent); return true; } bool SharedDIBSurface::Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight, bool aTransparent) { nsresult rv = mSharedDIB.Attach(aHandle, aWidth, aHeight, aTransparent); if (NS_FAILED(rv) || !mSharedDIB.IsValid()) return false; InitSurface(aWidth, aHeight, aTransparent); return true; } void SharedDIBSurface::InitSurface(uint32_t aWidth, uint32_t aHeight, bool aTransparent) { long stride = long(aWidth * SharedDIB::kBytesPerPixel); unsigned char* data = reinterpret_cast<unsigned char*>(mSharedDIB.GetBits()); gfxImageFormat format = aTransparent ? SurfaceFormat::A8R8G8B8_UINT32 : SurfaceFormat::X8R8G8B8_UINT32; gfxImageSurface::InitWithData(data, IntSize(aWidth, aHeight), stride, format); cairo_surface_set_user_data(mSurface, &SHAREDDIB_KEY, this, nullptr); } bool SharedDIBSurface::IsSharedDIBSurface(gfxASurface* aSurface) { return aSurface && aSurface->GetType() == gfxSurfaceType::Image && aSurface->GetData(&SHAREDDIB_KEY); } } // namespace gfx } // namespace mozilla