1 files changed, 272 insertions, 0 deletions
diff --git a/vcl/headless/svpbmp.cxx b/vcl/headless/svpbmp.cxx
new file mode 100644
index 0000000000..178ea129c6
--- /dev/null
+++ b/vcl/headless/svpbmp.cxx
@@ -0,0 +1,272 @@
+/* -*- 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 <cstring>
+
+#include <headless/svpbmp.hxx>
+#include <headless/svpgdi.hxx>
+#include <headless/svpinst.hxx>
+
+#include <basegfx/vector/b2ivector.hxx>
+#include <basegfx/range/b2ibox.hxx>
+#include <o3tl/safeint.hxx>
+#include <tools/helpers.hxx>
+#include <vcl/bitmap.hxx>
+
+using namespace basegfx;
+
+SvpSalBitmap::SvpSalBitmap()
+{
+}
+
+SvpSalBitmap::~SvpSalBitmap()
+{
+    Destroy();
+}
+
+static std::optional<BitmapBuffer> ImplCreateDIB(
+    const Size& rSize,
+    vcl::PixelFormat ePixelFormat,
+    const BitmapPalette& rPal,
+    bool bClear)
+{
+    if (!rSize.Width() || !rSize.Height())
+        return std::nullopt;
+
+    std::optional<BitmapBuffer> pDIB(std::in_place);
+
+    switch (ePixelFormat)
+    {
+        case vcl::PixelFormat::N8_BPP:
+            pDIB->mnFormat = ScanlineFormat::N8BitPal;
+            break;
+        case vcl::PixelFormat::N24_BPP:
+            pDIB->mnFormat = SVP_24BIT_FORMAT;
+            break;
+        case vcl::PixelFormat::N32_BPP:
+            pDIB->mnFormat = SVP_CAIRO_FORMAT;
+            break;
+        case vcl::PixelFormat::INVALID:
+            assert(false);
+            pDIB->mnFormat = SVP_CAIRO_FORMAT;
+            break;
+    }
+
+    sal_uInt16 nColors = 0;
+    if (ePixelFormat <= vcl::PixelFormat::N8_BPP)
+        nColors = vcl::numberOfColors(ePixelFormat);
+
+    pDIB->mnFormat |= ScanlineFormat::TopDown;
+    pDIB->mnWidth = rSize.Width();
+    pDIB->mnHeight = rSize.Height();
+    tools::Long nScanlineBase;
+    bool bFail = o3tl::checked_multiply<tools::Long>(pDIB->mnWidth, vcl::pixelFormatBitCount(ePixelFormat), nScanlineBase);
+    if (bFail)
+    {
+        SAL_WARN("vcl.gdi", "checked multiply failed");
+        return std::nullopt;
+    }
+    pDIB->mnScanlineSize = AlignedWidth4Bytes(nScanlineBase);
+    if (pDIB->mnScanlineSize < nScanlineBase/8)
+    {
+        SAL_WARN("vcl.gdi", "scanline calculation wraparound");
+        return std::nullopt;
+    }
+    pDIB->mnBitCount = vcl::pixelFormatBitCount(ePixelFormat);
+
+    if (nColors)
+    {
+        pDIB->maPalette = rPal;
+        pDIB->maPalette.SetEntryCount( nColors );
+    }
+
+    size_t size;
+    bFail = o3tl::checked_multiply<size_t>(pDIB->mnHeight, pDIB->mnScanlineSize, size);
+    SAL_WARN_IF(bFail, "vcl.gdi", "checked multiply failed");
+    if (bFail || size > SAL_MAX_INT32/2)
+    {
+        return std::nullopt;
+    }
+
+    try
+    {
+        pDIB->mpBits = new sal_uInt8[size];
+#ifdef __SANITIZE_ADDRESS__
+        if (!pDIB->mpBits)
+        {   // can only happen with ASAN allocator_may_return_null=1
+            pDIB.reset();
+        }
+        else
+#endif
+        if (bClear)
+        {
+            std::memset(pDIB->mpBits, 0, size);
+        }
+    }
+    catch (const std::bad_alloc&)
+    {
+        pDIB.reset();
+    }
+
+    return pDIB;
+}
+
+void SvpSalBitmap::Create(const std::optional<BitmapBuffer>& pBuf)
+{
+    Destroy();
+    moDIB = pBuf;
+}
+
+bool SvpSalBitmap::ImplCreate(const Size& rSize, vcl::PixelFormat ePixelFormat,
+                              const BitmapPalette& rPal, bool bClear)
+{
+    Destroy();
+    moDIB = ImplCreateDIB(rSize, ePixelFormat, rPal, bClear);
+    return moDIB.has_value();
+}
+
+bool SvpSalBitmap::Create(const Size& rSize, vcl::PixelFormat ePixelFormat, const BitmapPalette& rPal)
+{
+    return ImplCreate(rSize, ePixelFormat, rPal, true);
+}
+
+bool SvpSalBitmap::Create(const SalBitmap& rBmp)
+{
+    Destroy();
+
+    const SvpSalBitmap& rSalBmp = static_cast<const SvpSalBitmap&>(rBmp);
+
+    if (rSalBmp.moDIB)
+    {
+        // TODO: reference counting...
+        moDIB.emplace( *rSalBmp.moDIB );
+
+        const size_t size = moDIB->mnScanlineSize * moDIB->mnHeight;
+        if (size > SAL_MAX_INT32/2)
+        {
+            moDIB.reset();
+            return false;
+        }
+
+        // TODO: get rid of this when BitmapBuffer gets copy constructor
+        try
+        {
+            moDIB->mpBits = new sal_uInt8[size];
+            std::memcpy(moDIB->mpBits, rSalBmp.moDIB->mpBits, size);
+        }
+        catch (const std::bad_alloc&)
+        {
+            moDIB.reset();
+        }
+    }
+
+    return !rSalBmp.moDIB.has_value() || moDIB.has_value();
+}
+
+bool SvpSalBitmap::Create( const SalBitmap& /*rSalBmp*/,
+                           SalGraphics* /*pGraphics*/ )
+{
+    return false;
+}
+
+bool SvpSalBitmap::Create(const SalBitmap& /*rSalBmp*/,
+                          vcl::PixelFormat /*eNewPixelFormat*/)
+{
+    return false;
+}
+
+bool SvpSalBitmap::Create( const css::uno::Reference< css::rendering::XBitmapCanvas >& /*xBitmapCanvas*/, Size& /*rSize*/, bool /*bMask*/ )
+{
+    return false;
+}
+
+void SvpSalBitmap::Destroy()
+{
+    if (moDIB.has_value())
+    {
+        delete[] moDIB->mpBits;
+        moDIB.reset();
+    }
+}
+
+Size SvpSalBitmap::GetSize() const
+{
+    Size aSize;
+
+    if (moDIB.has_value())
+    {
+        aSize.setWidth( moDIB->mnWidth );
+        aSize.setHeight( moDIB->mnHeight );
+    }
+
+    return aSize;
+}
+
+sal_uInt16 SvpSalBitmap::GetBitCount() const
+{
+    sal_uInt16 nBitCount;
+
+    if (moDIB.has_value())
+        nBitCount = moDIB->mnBitCount;
+    else
+        nBitCount = 0;
+
+    return nBitCount;
+}
+
+BitmapBuffer* SvpSalBitmap::AcquireBuffer(BitmapAccessMode)
+{
+    return moDIB ? &*moDIB : nullptr;
+}
+
+void SvpSalBitmap::ReleaseBuffer(BitmapBuffer*, BitmapAccessMode nMode)
+{
+    if( nMode == BitmapAccessMode::Write )
+        InvalidateChecksum();
+}
+
+bool SvpSalBitmap::GetSystemData( BitmapSystemData& )
+{
+    return false;
+}
+
+bool SvpSalBitmap::ScalingSupported() const
+{
+    return false;
+}
+
+bool SvpSalBitmap::Scale( const double& /*rScaleX*/, const double& /*rScaleY*/, BmpScaleFlag /*nScaleFlag*/ )
+{
+    return false;
+}
+
+bool SvpSalBitmap::Replace( const ::Color& /*rSearchColor*/, const ::Color& /*rReplaceColor*/, sal_uInt8 /*nTol*/ )
+{
+    return false;
+}
+
+const basegfx::SystemDependentDataHolder* SvpSalBitmap::accessSystemDependentDataHolder() const
+{
+    return this;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */