1 files changed, 74 insertions, 0 deletions
diff --git a/canvas/inc/rendering/icolorbuffer.hxx b/canvas/inc/rendering/icolorbuffer.hxx
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+++ b/canvas/inc/rendering/icolorbuffer.hxx
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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 .
+ */
+
+#pragma once
+
+#include <sal/types.h>
+
+namespace canvas
+{
+    /** Interface for a raw memory pixel container
+
+        Use this interface to represent a surface of raw pixel (e.g. a
+        bitmap) to the canvas rendering framework.
+     */
+    struct IColorBuffer
+    {
+        /// The underlying pixel format for this buffer
+        enum class Format
+        {
+            // 32-bit ARGB pixel format with alpha, 8 bits per channel.
+            A8R8G8B8,
+
+            // 32-bit RGB pixel format, 8 bits per channel.
+            X8R8G8B8
+        };
+
+        virtual ~IColorBuffer() {}
+
+        /** Get a pointer to the raw memory bits of the pixel
+         */
+        virtual sal_uInt8* lock() const = 0;
+
+        /** unlock previous locked buffer
+        */
+        virtual void unlock() const = 0;
+
+        /** Get width in pixel
+         */
+        virtual sal_uInt32 getWidth() const = 0;
+
+        /** Get height in pixel
+         */
+        virtual sal_uInt32 getHeight() const = 0;
+
+        /** Offset, in bytes, between consecutive scan lines of the bitmap.
+            If the stride is positive, the bitmap is top-down.
+            If the stride is negative, the bitmap is bottom-up.
+            The returned value is only valid while the buffer is locked.
+         */
+        virtual sal_uInt32 getStride() const = 0;
+
+        /** Get format of the color buffer
+         */
+        virtual Format getFormat() const = 0;
+    };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */