Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 242 insertions, 0 deletions

diff --git a/vcl/source/bitmap/bitmappalette.cxx b/vcl/source/bitmap/bitmappalette.cxx
new file mode 100644
index 0000000000..43eae34754
--- /dev/null
+++ b/vcl/source/bitmap/bitmappalette.cxx
@@ -0,0 +1,242 @@
+/* -*- 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 <config_features.h>
+
+#include <sal/log.hxx>
+#include <osl/diagnose.h>
+#include <rtl/crc.h>
+#include <tools/helpers.hxx>
+
+#include <vcl/BitmapPalette.hxx>
+#include <vcl/bitmapex.hxx>
+#include <vcl/outdev.hxx>
+
+#include <svdata.hxx>
+#include <salinst.hxx>
+
+class ImplBitmapPalette
+{
+public:
+    ImplBitmapPalette(std::initializer_list<BitmapColor> aBitmapColor)
+        : maBitmapColor(aBitmapColor)
+    {
+    }
+    ImplBitmapPalette(const BitmapColor* first, const BitmapColor* last)
+        : maBitmapColor(first, last)
+    {
+    }
+    ImplBitmapPalette() {}
+    ImplBitmapPalette(sal_uInt16 nCount)
+        : maBitmapColor(nCount)
+    {
+    }
+    std::vector<BitmapColor>& GetBitmapData() { return maBitmapColor; }
+    const std::vector<BitmapColor>& GetBitmapData() const { return maBitmapColor; }
+    bool operator==(const ImplBitmapPalette& rBitmapPalette) const
+    {
+        return maBitmapColor == rBitmapPalette.maBitmapColor;
+    }
+
+private:
+    std::vector<BitmapColor> maBitmapColor;
+};
+
+namespace
+{
+BitmapPalette::ImplType& GetGlobalDefault()
+{
+    static BitmapPalette::ImplType gDefault;
+    return gDefault;
+}
+}
+
+BitmapPalette::BitmapPalette()
+    : mpImpl(GetGlobalDefault())
+{
+}
+
+BitmapPalette::BitmapPalette(const BitmapPalette& rOther)
+    : mpImpl(rOther.mpImpl)
+{
+}
+
+BitmapPalette::BitmapPalette(BitmapPalette&& rOther) noexcept
+    : mpImpl(std::move(rOther.mpImpl))
+{
+}
+
+BitmapPalette::BitmapPalette(std::initializer_list<BitmapColor> aBitmapColor)
+    : mpImpl(aBitmapColor)
+{
+}
+
+BitmapPalette::BitmapPalette(const BitmapColor* first, const BitmapColor* last)
+    : mpImpl({ first, last })
+{
+}
+
+BitmapPalette::BitmapPalette(sal_uInt16 nCount)
+    : mpImpl(nCount)
+{
+}
+
+BitmapPalette::~BitmapPalette() {}
+
+BitmapPalette& BitmapPalette::operator=(const BitmapPalette& rOther)
+{
+    mpImpl = rOther.mpImpl;
+    return *this;
+}
+
+BitmapPalette& BitmapPalette::operator=(BitmapPalette&& rOther) noexcept
+{
+    mpImpl = std::move(rOther.mpImpl);
+    return *this;
+}
+
+const BitmapColor* BitmapPalette::ImplGetColorBuffer() const
+{
+    return mpImpl->GetBitmapData().data();
+}
+
+BitmapColor* BitmapPalette::ImplGetColorBuffer() { return mpImpl->GetBitmapData().data(); }
+
+BitmapChecksum BitmapPalette::GetChecksum() const
+{
+    auto const& rBitmapData = mpImpl->GetBitmapData();
+    return rtl_crc32(0, rBitmapData.data(), rBitmapData.size() * sizeof(BitmapColor));
+}
+
+bool BitmapPalette::operator==(const BitmapPalette& rOther) const
+{
+    return mpImpl == rOther.mpImpl;
+}
+
+bool BitmapPalette::operator!() const { return mpImpl->GetBitmapData().empty(); }
+
+sal_uInt16 BitmapPalette::GetEntryCount() const { return mpImpl->GetBitmapData().size(); }
+
+void BitmapPalette::SetEntryCount(sal_uInt16 nCount) { mpImpl->GetBitmapData().resize(nCount); }
+
+const BitmapColor& BitmapPalette::operator[](sal_uInt16 nIndex) const
+{
+    assert(nIndex < mpImpl->GetBitmapData().size() && "Palette index is out of range");
+    return mpImpl->GetBitmapData()[nIndex];
+}
+
+BitmapColor& BitmapPalette::operator[](sal_uInt16 nIndex)
+{
+    assert(nIndex < mpImpl->GetBitmapData().size() && "Palette index is out of range");
+    return mpImpl->GetBitmapData()[nIndex];
+}
+
+/// Returns the BitmapColor (i.e. palette index) that is either an exact match
+/// of the required color, or failing that, the entry that is the closest i.e. least error
+/// as measured by Color::GetColorError.
+sal_uInt16 BitmapPalette::GetBestIndex(const BitmapColor& rCol) const
+{
+    auto const& rBitmapColor = mpImpl->GetBitmapData();
+    sal_uInt16 nRetIndex = 0;
+
+    if (!rBitmapColor.empty())
+    {
+        for (size_t j = 0; j < rBitmapColor.size(); ++j)
+        {
+            if (rCol == rBitmapColor[j])
+            {
+                return j;
+            }
+        }
+
+        sal_uInt16 nLastErr = SAL_MAX_UINT16;
+        for (size_t i = 0; i < rBitmapColor.size(); ++i)
+        {
+            const sal_uInt16 nActErr = rCol.GetColorError(rBitmapColor[i]);
+            if (nActErr < nLastErr)
+            {
+                nLastErr = nActErr;
+                nRetIndex = i;
+            }
+        }
+    }
+
+    return nRetIndex;
+}
+
+/// Returns the BitmapColor (i.e. palette index) that is an exact match
+/// of the required color. Returns SAL_MAX_UINT16 if nothing found.
+sal_uInt16 BitmapPalette::GetMatchingIndex(const BitmapColor& rCol) const
+{
+    auto const& rBitmapColor = mpImpl->GetBitmapData();
+
+    for (size_t j = 0; j < rBitmapColor.size(); ++j)
+    {
+        if (rCol == rBitmapColor[j])
+        {
+            return j;
+        }
+    }
+
+    return SAL_MAX_UINT16;
+}
+
+bool BitmapPalette::IsGreyPaletteAny() const
+{
+    auto const& rBitmapColor = mpImpl->GetBitmapData();
+    const int nEntryCount = GetEntryCount();
+    if (!nEntryCount) // NOTE: an empty palette means 1:1 mapping
+        return true;
+    // See above: only certain entry values will result in a valid call to GetGreyPalette
+    if (nEntryCount == 2 || nEntryCount == 4 || nEntryCount == 16 || nEntryCount == 256)
+    {
+        const BitmapPalette& rGreyPalette = Bitmap::GetGreyPalette(nEntryCount);
+        if (rGreyPalette == *this)
+            return true;
+    }
+
+    bool bRet = false;
+    // TODO: is it worth to compare the entries for the general case?
+    if (nEntryCount == 2)
+    {
+        const BitmapColor& rCol0(rBitmapColor[0]);
+        const BitmapColor& rCol1(rBitmapColor[1]);
+        bRet = rCol0.GetRed() == rCol0.GetGreen() && rCol0.GetRed() == rCol0.GetBlue()
+               && rCol1.GetRed() == rCol1.GetGreen() && rCol1.GetRed() == rCol1.GetBlue();
+    }
+    return bRet;
+}
+
+bool BitmapPalette::IsGreyPalette8Bit() const
+{
+    auto const& rBitmapColor = mpImpl->GetBitmapData();
+    const int nEntryCount = GetEntryCount();
+    if (!nEntryCount) // NOTE: an empty palette means 1:1 mapping
+        return true;
+    if (nEntryCount != 256)
+        return false;
+    for (sal_uInt16 i = 0; i < 256; ++i)
+    {
+        if (rBitmapColor[i] != BitmapColor(i, i, i))
+            return false;
+    }
+    return true;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */