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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <headless/BitmapHelper.hxx>
#include <vcl/cairo.hxx>
#include <vcl/svapp.hxx>
#include <utility>
BitmapHelper::BitmapHelper(const SalBitmap& rSourceBitmap, const bool bForceARGB32)
#ifdef HAVE_CAIRO_FORMAT_RGB24_888
: m_bForceARGB32(bForceARGB32)
#endif
{
const SvpSalBitmap& rSrcBmp = static_cast<const SvpSalBitmap&>(rSourceBitmap);
#ifdef HAVE_CAIRO_FORMAT_RGB24_888
if ((rSrcBmp.GetBitCount() != 32 && rSrcBmp.GetBitCount() != 24) || bForceARGB32)
#else
(void)bForceARGB32;
if (rSrcBmp.GetBitCount() != 32)
#endif
{
//big stupid copy here
const BitmapBuffer* pSrc = rSrcBmp.GetBuffer();
const SalTwoRect aTwoRect
= { 0, 0, pSrc->mnWidth, pSrc->mnHeight, 0, 0, pSrc->mnWidth, pSrc->mnHeight };
std::optional<BitmapBuffer> pTmp
= (pSrc->meFormat == SVP_24BIT_FORMAT
&& pSrc->meDirection == ScanlineDirection::TopDown)
? FastConvert24BitRgbTo32BitCairo(pSrc)
: StretchAndConvert(*pSrc, aTwoRect, SVP_CAIRO_FORMAT);
aTmpBmp.Create(std::move(pTmp));
assert(aTmpBmp.GetBitCount() == 32);
implSetSurface(CairoCommon::createCairoSurface(aTmpBmp.GetBuffer()));
}
else
{
implSetSurface(CairoCommon::createCairoSurface(rSrcBmp.GetBuffer()));
}
}
void BitmapHelper::mark_dirty() { cairo_surface_mark_dirty(implGetSurface()); }
unsigned char* BitmapHelper::getBits(sal_Int32& rStride)
{
cairo_surface_flush(implGetSurface());
unsigned char* mask_data = cairo_image_surface_get_data(implGetSurface());
const cairo_format_t nFormat = cairo_image_surface_get_format(implGetSurface());
#ifdef HAVE_CAIRO_FORMAT_RGB24_888
if (!m_bForceARGB32)
assert(nFormat == CAIRO_FORMAT_RGB24_888 && "Expected RGB24_888 image");
else
#endif
{
assert(nFormat == CAIRO_FORMAT_ARGB32
&& "need to implement CAIRO_FORMAT_A1 after all here");
}
rStride
= cairo_format_stride_for_width(nFormat, cairo_image_surface_get_width(implGetSurface()));
return mask_data;
}
MaskHelper::MaskHelper(const SalBitmap& rAlphaBitmap)
{
const SvpSalBitmap& rMask = static_cast<const SvpSalBitmap&>(rAlphaBitmap);
const BitmapBuffer* pMaskBuf = rMask.GetBuffer();
assert(rAlphaBitmap.GetBitCount() == 8 && "we only support 8-bit masks now");
implSetSurface(cairo_image_surface_create_for_data(pMaskBuf->mpBits, CAIRO_FORMAT_A8,
pMaskBuf->mnWidth, pMaskBuf->mnHeight,
pMaskBuf->mnScanlineSize));
}
namespace
{
// check for env var that decides for using downscale pattern
const char* pDisableDownScale(getenv("SAL_DISABLE_CAIRO_DOWNSCALE"));
bool bDisableDownScale(nullptr != pDisableDownScale);
sal_Int64 estimateUsageInBytesForSurfaceHelper(const SurfaceHelper* pHelper)
{
sal_Int64 nRetval(0);
if (nullptr != pHelper)
{
cairo_surface_t* pSurface(pHelper->getSurface());
if (pSurface)
{
const tools::Long nStride(cairo_image_surface_get_stride(pSurface));
const tools::Long nHeight(cairo_image_surface_get_height(pSurface));
nRetval = nStride * nHeight;
// if we do downscale, size will grow by 1/4 + 1/16 + 1/32 + ...,
// rough estimation just multiplies by 1.25, should be good enough
// for estimation of buffer survival time
if (!bDisableDownScale)
{
nRetval = (nRetval * 5) / 4;
}
}
}
return nRetval;
}
} // end anonymous namespace
SystemDependentData_BitmapHelper::SystemDependentData_BitmapHelper(
std::shared_ptr<BitmapHelper> xBitmapHelper)
: basegfx::SystemDependentData(Application::GetSystemDependentDataManager())
, maBitmapHelper(std::move(xBitmapHelper))
{
}
sal_Int64 SystemDependentData_BitmapHelper::estimateUsageInBytes() const
{
return estimateUsageInBytesForSurfaceHelper(maBitmapHelper.get());
}
SystemDependentData_MaskHelper::SystemDependentData_MaskHelper(
std::shared_ptr<MaskHelper> xMaskHelper)
: basegfx::SystemDependentData(Application::GetSystemDependentDataManager())
, maMaskHelper(std::move(xMaskHelper))
{
}
sal_Int64 SystemDependentData_MaskHelper::estimateUsageInBytes() const
{
return estimateUsageInBytesForSurfaceHelper(maMaskHelper.get());
}
namespace
{
// MM02 decide to use buffers or not
const char* pDisableMM02Goodies(getenv("SAL_DISABLE_MM02_GOODIES"));
bool bUseBuffer(nullptr == pDisableMM02Goodies);
const tools::Long nMinimalSquareSizeToBuffer(64 * 64);
}
void tryToUseSourceBuffer(const SalBitmap& rSourceBitmap, std::shared_ptr<BitmapHelper>& rSurface)
{
// MM02 try to access buffered BitmapHelper
std::shared_ptr<SystemDependentData_BitmapHelper> pSystemDependentData_BitmapHelper;
const bool bBufferSource(bUseBuffer
&& rSourceBitmap.GetSize().Width() * rSourceBitmap.GetSize().Height()
> nMinimalSquareSizeToBuffer);
if (bBufferSource)
{
pSystemDependentData_BitmapHelper
= rSourceBitmap.getSystemDependentData<SystemDependentData_BitmapHelper>();
if (pSystemDependentData_BitmapHelper)
{
// reuse buffered data
rSurface = pSystemDependentData_BitmapHelper->getBitmapHelper();
}
}
if (rSurface)
return;
// create data on-demand
rSurface = std::make_shared<BitmapHelper>(rSourceBitmap);
if (bBufferSource)
{
// add to buffering mechanism to potentially reuse next time
rSourceBitmap.addOrReplaceSystemDependentData<SystemDependentData_BitmapHelper>(rSurface);
}
}
void tryToUseMaskBuffer(const SalBitmap& rMaskBitmap, std::shared_ptr<MaskHelper>& rMask)
{
// MM02 try to access buffered MaskHelper
std::shared_ptr<SystemDependentData_MaskHelper> pSystemDependentData_MaskHelper;
const bool bBufferMask(bUseBuffer
&& rMaskBitmap.GetSize().Width() * rMaskBitmap.GetSize().Height()
> nMinimalSquareSizeToBuffer);
if (bBufferMask)
{
pSystemDependentData_MaskHelper
= rMaskBitmap.getSystemDependentData<SystemDependentData_MaskHelper>();
if (pSystemDependentData_MaskHelper)
{
// reuse buffered data
rMask = pSystemDependentData_MaskHelper->getMaskHelper();
}
}
if (rMask)
return;
// create data on-demand
rMask = std::make_shared<MaskHelper>(rMaskBitmap);
if (bBufferMask)
{
// add to buffering mechanism to potentially reuse next time
rMaskBitmap.addOrReplaceSystemDependentData<SystemDependentData_MaskHelper>(rMask);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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