gfx/ipc/SharedDIBSurface.cpp@925c144e1f1f (annotated)
gfx/ipc/SharedDIBSurface.cpp
Fri, 16 Jan 2015 18:13:44 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 18:13:44 +0100
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
- permissions
- -rw-r--r--
Integrate suggestion from review to improve consistency with existing code.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "SharedDIBSurface.h" |
| michael@0 | 7 | |
| michael@0 | 8 | #include "cairo.h" |
| michael@0 | 9 | |
| michael@0 | 10 | namespace mozilla { |
| michael@0 | 11 | namespace gfx { |
| michael@0 | 12 | |
| michael@0 | 13 | static const cairo_user_data_key_t SHAREDDIB_KEY = {0}; |
| michael@0 | 14 | |
| michael@0 | 15 | static const long kBytesPerPixel = 4; |
| michael@0 | 16 | |
| michael@0 | 17 | bool |
| michael@0 | 18 | SharedDIBSurface::Create(HDC adc, uint32_t aWidth, uint32_t aHeight, |
| michael@0 | 19 | bool aTransparent) |
| michael@0 | 20 | { |
| michael@0 | 21 | nsresult rv = mSharedDIB.Create(adc, aWidth, aHeight, aTransparent); |
| michael@0 | 22 | if (NS_FAILED(rv) || !mSharedDIB.IsValid()) |
| michael@0 | 23 | return false; |
| michael@0 | 24 | |
| michael@0 | 25 | InitSurface(aWidth, aHeight, aTransparent); |
| michael@0 | 26 | return true; |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | bool |
| michael@0 | 30 | SharedDIBSurface::Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight, |
| michael@0 | 31 | bool aTransparent) |
| michael@0 | 32 | { |
| michael@0 | 33 | nsresult rv = mSharedDIB.Attach(aHandle, aWidth, aHeight, aTransparent); |
| michael@0 | 34 | if (NS_FAILED(rv) || !mSharedDIB.IsValid()) |
| michael@0 | 35 | return false; |
| michael@0 | 36 | |
| michael@0 | 37 | InitSurface(aWidth, aHeight, aTransparent); |
| michael@0 | 38 | return true; |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | void |
| michael@0 | 42 | SharedDIBSurface::InitSurface(uint32_t aWidth, uint32_t aHeight, |
| michael@0 | 43 | bool aTransparent) |
| michael@0 | 44 | { |
| michael@0 | 45 | long stride = long(aWidth * kBytesPerPixel); |
| michael@0 | 46 | unsigned char* data = reinterpret_cast<unsigned char*>(mSharedDIB.GetBits()); |
| michael@0 | 47 | |
| michael@0 | 48 | gfxImageFormat format = aTransparent ? gfxImageFormat::ARGB32 : gfxImageFormat::RGB24; |
| michael@0 | 49 | |
| michael@0 | 50 | gfxImageSurface::InitWithData(data, gfxIntSize(aWidth, aHeight), |
| michael@0 | 51 | stride, format); |
| michael@0 | 52 | |
| michael@0 | 53 | cairo_surface_set_user_data(mSurface, &SHAREDDIB_KEY, this, nullptr); |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | bool |
| michael@0 | 57 | SharedDIBSurface::IsSharedDIBSurface(gfxASurface* aSurface) |
| michael@0 | 58 | { |
| michael@0 | 59 | return aSurface && |
| michael@0 | 60 | aSurface->GetType() == gfxSurfaceType::Image && |
| michael@0 | 61 | aSurface->GetData(&SHAREDDIB_KEY); |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | } // namespace gfx |
| michael@0 | 65 | } // namespace mozilla |
