1 files changed, 79 insertions, 0 deletions
diff --git a/include/vcl/RawBitmap.hxx b/include/vcl/RawBitmap.hxx
new file mode 100644
index 000000000..12c924dbb
--- /dev/null
+++ b/include/vcl/RawBitmap.hxx
@@ -0,0 +1,79 @@
+/* -*- 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/.
+ */
+
+#pragma once
+
+#include <o3tl/safeint.hxx>
+#include <vcl/BitmapColor.hxx>
+#include <vcl/bitmapex.hxx>
+
+namespace vcl::bitmap
+{
+/**
+ * Intended to be used to feed into CreateFromData to create a BitmapEx. RGB data format.
+ */
+class VCL_DLLPUBLIC RawBitmap
+{
+    friend BitmapEx VCL_DLLPUBLIC CreateFromData(RawBitmap&& rawBitmap);
+    std::unique_ptr<sal_uInt8[]> mpData;
+    Size maSize;
+    sal_uInt8 mnBitCount;
+
+public:
+    RawBitmap(Size const& rSize, sal_uInt8 nBitCount)
+        : maSize(rSize)
+        , mnBitCount(nBitCount)
+    {
+        assert(nBitCount == 24 || nBitCount == 32);
+        if (rSize.getWidth() > std::numeric_limits<sal_Int32>::max() || rSize.getWidth() < 0)
+            throw std::bad_alloc();
+        if (rSize.getHeight() > std::numeric_limits<sal_Int32>::max() || rSize.getHeight() < 0)
+            throw std::bad_alloc();
+        sal_Int32 nRowSize, nDataSize;
+        if (o3tl::checked_multiply<sal_Int32>(rSize.getWidth(), nBitCount / 8, nRowSize)
+            || o3tl::checked_multiply<sal_Int32>(nRowSize, rSize.getHeight(), nDataSize)
+            || nDataSize < 0)
+        {
+            throw std::bad_alloc();
+        }
+        mpData.reset(new sal_uInt8[nDataSize]);
+    }
+    void SetPixel(tools::Long nY, tools::Long nX, Color nColor)
+    {
+        tools::Long p = (nY * maSize.getWidth() + nX) * (mnBitCount / 8);
+        mpData[p++] = nColor.GetRed();
+        mpData[p++] = nColor.GetGreen();
+        mpData[p++] = nColor.GetBlue();
+        if (mnBitCount == 32)
+            mpData[p] = nColor.GetAlpha();
+    }
+    void SetAlpha(tools::Long nY, tools::Long nX, sal_uInt8 nAlpha)
+    {
+        assert(mnBitCount == 32);
+        tools::Long p = (nY * maSize.getWidth() + nX) * (mnBitCount / 8) + 3;
+        mpData[p] = nAlpha;
+    }
+    Color GetPixel(tools::Long nY, tools::Long nX) const
+    {
+        tools::Long p = (nY * maSize.getWidth() + nX) * mnBitCount / 8;
+        if (mnBitCount == 24)
+            return Color(mpData[p], mpData[p + 1], mpData[p + 2]);
+        else
+            return Color(ColorAlpha, mpData[p + 3], mpData[p], mpData[p + 1], mpData[p + 2]);
+    }
+    // so we don't accidentally leave any code in that uses palette color indexes
+    void SetPixel(tools::Long nY, tools::Long nX, BitmapColor nColor) = delete;
+    tools::Long Height() const { return maSize.Height(); }
+    tools::Long Width() const { return maSize.Width(); }
+    sal_uInt8 GetBitCount() const { return mnBitCount; }
+};
+
+} // end vcl::bitmap
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */