The Tor Browser: gfx/ipc/SharedDIBSurface.cpp@925c144e1f1f

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "SharedDIBSurface.h"

     8 #include "cairo.h"

    10 namespace mozilla {

    11 namespace gfx {

    13 static const cairo_user_data_key_t SHAREDDIB_KEY = {0};

    15 static const long kBytesPerPixel = 4;

    17 bool

    18 SharedDIBSurface::Create(HDC adc, uint32_t aWidth, uint32_t aHeight,

    19                          bool aTransparent)

    20 {

    21   nsresult rv = mSharedDIB.Create(adc, aWidth, aHeight, aTransparent);

    22   if (NS_FAILED(rv) || !mSharedDIB.IsValid())

    23     return false;

    25   InitSurface(aWidth, aHeight, aTransparent);

    26   return true;

    27 }

    29 bool

    30 SharedDIBSurface::Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,

    31                          bool aTransparent)

    32 {

    33   nsresult rv = mSharedDIB.Attach(aHandle, aWidth, aHeight, aTransparent);

    34   if (NS_FAILED(rv) || !mSharedDIB.IsValid())

    35     return false;

    37   InitSurface(aWidth, aHeight, aTransparent);

    38   return true;

    39 }

    41 void

    42 SharedDIBSurface::InitSurface(uint32_t aWidth, uint32_t aHeight,

    43                               bool aTransparent)

    44 {

    45   long stride = long(aWidth * kBytesPerPixel);

    46   unsigned char* data = reinterpret_cast<unsigned char*>(mSharedDIB.GetBits());

    48   gfxImageFormat format = aTransparent ? gfxImageFormat::ARGB32 : gfxImageFormat::RGB24;

    50   gfxImageSurface::InitWithData(data, gfxIntSize(aWidth, aHeight),

    51                                 stride, format);

    53   cairo_surface_set_user_data(mSurface, &SHAREDDIB_KEY, this, nullptr);

    54 }

    56 bool

    57 SharedDIBSurface::IsSharedDIBSurface(gfxASurface* aSurface)

    58 {

    59   return aSurface &&

    60     aSurface->GetType() == gfxSurfaceType::Image &&

    61     aSurface->GetData(&SHAREDDIB_KEY);

    62 }

    64 } // namespace gfx

    65 } // namespace mozilla

The Tor Browser / file revision