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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 <sal/config.h>
#include <sal/log.hxx>
#include <vcl/graph.hxx>
#include <vcl/BitmapTools.hxx>
#include <vcl/animate/Animation.hxx>
#include <bitmap/BitmapWriteAccess.hxx>
#include <tools/stream.hxx>
#include <unotools/configmgr.hxx>
#include <tiffio.h>
#include <filter/TiffReader.hxx>
namespace
{
struct Context
{
SvStream& rStream;
tsize_t nSize;
Context(SvStream& rInStream, tsize_t nInSize)
: rStream(rInStream)
, nSize(nInSize)
{
}
};
}
static tsize_t tiff_read(thandle_t handle, tdata_t buf, tsize_t size)
{
Context* pContext = static_cast<Context*>(handle);
return pContext->rStream.ReadBytes(buf, size);
}
static tsize_t tiff_write(thandle_t, tdata_t, tsize_t)
{
return -1;
}
static toff_t tiff_seek(thandle_t handle, toff_t offset, int whence)
{
Context* pContext = static_cast<Context*>(handle);
switch (whence)
{
case SEEK_SET:
pContext->rStream.Seek(offset);
break;
case SEEK_CUR:
pContext->rStream.SeekRel(offset);
break;
case SEEK_END:
pContext->rStream.Seek(STREAM_SEEK_TO_END);
pContext->rStream.SeekRel(offset);
break;
default:
assert(false && "unknown seek type");
break;
}
return pContext->rStream.Tell();
}
static int tiff_close(thandle_t)
{
return 0;
}
static toff_t tiff_size(thandle_t handle)
{
Context* pContext = static_cast<Context*>(handle);
return pContext->nSize;
}
bool ImportTiffGraphicImport(SvStream& rTIFF, Graphic& rGraphic)
{
Context aContext(rTIFF, rTIFF.remainingSize());
TIFF* tif = TIFFClientOpen("libtiff-svstream", "r", &aContext,
tiff_read, tiff_write,
tiff_seek, tiff_close,
tiff_size, nullptr, nullptr);
if (!tif)
return false;
Animation aAnimation;
do
{
uint32_t w, h;
if (TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w) != 1)
{
SAL_WARN("filter.tiff", "missing width");
break;
}
if (TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h) != 1)
{
SAL_WARN("filter.tiff", "missing height");
break;
}
if (w > SAL_MAX_INT32 / 8 || h > SAL_MAX_INT32 / 8)
{
SAL_WARN("filter.tiff", "image too large");
break;
}
if (utl::ConfigManager::IsFuzzing())
{
const uint64_t MAX_SIZE = 500000000;
if (TIFFTileSize64(tif) > MAX_SIZE)
{
SAL_WARN("filter.tiff", "skipping large tiffs");
break;
}
}
uint32_t nPixelsRequired;
if (o3tl::checked_multiply(w, h, nPixelsRequired))
{
SAL_WARN("filter.tiff", "skipping oversized tiff image");
break;
}
std::vector<uint32_t> raster(nPixelsRequired);
if (TIFFReadRGBAImageOriented(tif, w, h, raster.data(), ORIENTATION_TOPLEFT, 1))
{
Bitmap bitmap(Size(w, h), vcl::PixelFormat::N24_BPP);
AlphaMask bitmapAlpha(Size(w, h));
BitmapScopedWriteAccess access(bitmap);
AlphaScopedWriteAccess accessAlpha(bitmapAlpha);
/*
ORIENTATION_TOPLEFT = 1
ORIENTATION_TOPRIGHT = 2
ORIENTATION_BOTRIGHT = 3
ORIENTATION_BOTLEFT = 4
ORIENTATION_LEFTTOP = 5
ORIENTATION_RIGHTTOP = 6
ORIENTATION_RIGHTBOT = 7
ORIENTATION_LEFTBOT = 8
*/
uint16_t nOrientation;
if (TIFFGetField(tif, TIFFTAG_ORIENTATION, &nOrientation) != 1)
nOrientation = 0;
for (uint32_t y = 0; y < h; ++y)
{
const uint32_t* src = raster.data() + w * y;
for (uint32_t x = 0; x < w; ++x)
{
sal_uInt8 r = TIFFGetR(*src);
sal_uInt8 g = TIFFGetG(*src);
sal_uInt8 b = TIFFGetB(*src);
sal_uInt8 a = TIFFGetA(*src);
uint32_t dest;
switch (nOrientation)
{
case ORIENTATION_LEFTBOT:
dest = w - 1 - x;
break;
default:
dest = x;
break;
}
access->SetPixel(y, dest, Color(r, g, b));
accessAlpha->SetPixelIndex(y, dest, 255 - a);
++src;
}
}
raster.clear();
access.reset();
accessAlpha.reset();
BitmapEx aBitmapEx(bitmap, bitmapAlpha);
switch (nOrientation)
{
case ORIENTATION_LEFTBOT:
aBitmapEx.Rotate(2700_deg10, COL_BLACK);
break;
default:
break;
}
AnimationBitmap aAnimationBitmap(aBitmapEx, Point(0, 0), aBitmapEx.GetSizePixel(),
ANIMATION_TIMEOUT_ON_CLICK, Disposal::Back);
aAnimation.Insert(aAnimationBitmap);
}
} while (TIFFReadDirectory(tif));
TIFFClose(tif);
const auto nImages = aAnimation.Count();
if (nImages)
{
if (nImages == 1)
rGraphic = aAnimation.GetBitmapEx();
else
rGraphic = aAnimation;
return true;
}
return false;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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