зеркало из https://github.com/mozilla/gecko-dev.git
54 строки
1.9 KiB
C++
54 строки
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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bool SharedDIBSurface::Create(HDC adc, uint32_t aWidth, uint32_t aHeight,
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bool aTransparent) {
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nsresult rv = mSharedDIB.Create(adc, aWidth, aHeight, aTransparent);
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if (NS_FAILED(rv) || !mSharedDIB.IsValid()) 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 SharedDIBSurface::Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,
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bool aTransparent) {
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nsresult rv = mSharedDIB.Attach(aHandle, aWidth, aHeight, aTransparent);
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if (NS_FAILED(rv) || !mSharedDIB.IsValid()) 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 SharedDIBSurface::InitSurface(uint32_t aWidth, uint32_t aHeight,
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bool aTransparent) {
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long stride = long(aWidth * SharedDIB::kBytesPerPixel);
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unsigned char* data = reinterpret_cast<unsigned char*>(mSharedDIB.GetBits());
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gfxImageFormat format = aTransparent ? SurfaceFormat::A8R8G8B8_UINT32
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: SurfaceFormat::X8R8G8B8_UINT32;
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gfxImageSurface::InitWithData(data, IntSize(aWidth, aHeight), stride, format);
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cairo_surface_set_user_data(mSurface, &SHAREDDIB_KEY, this, nullptr);
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}
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bool SharedDIBSurface::IsSharedDIBSurface(gfxASurface* aSurface) {
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return aSurface && aSurface->GetType() == gfxSurfaceType::Image &&
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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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