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/* -*- 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
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