1 files changed, 143 insertions, 0 deletions
diff --git a/canvas/source/tools/surface.hxx b/canvas/source/tools/surface.hxx
new file mode 100644
index 000000000..e78925292
--- /dev/null
+++ b/canvas/source/tools/surface.hxx
@@ -0,0 +1,143 @@
+/* -*- 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 <basegfx/point/b2ipoint.hxx>
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/range/b2drectangle.hxx>
+#include <basegfx/vector/b2isize.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <rendering/icolorbuffer.hxx>
+
+#include "pagemanager.hxx"
+
+namespace canvas
+{
+    /** surfaces denote occupied areas within pages.
+
+        pages encapsulate the hardware buffers that
+        contain image data which can be used for texturing.
+        surfaces are areas within those pages.
+    */
+    class Surface
+    {
+    public:
+
+        Surface( PageManagerSharedPtr         xPageManager,
+                 std::shared_ptr<IColorBuffer> xColorBuffer,
+                 const ::basegfx::B2IPoint&   rPos,
+                 const ::basegfx::B2ISize&    rSize );
+        ~Surface();
+
+        void setColorBufferDirty();
+
+        /** Render the surface content to screen.
+
+            @param fAlpha
+            Overall alpha for content
+
+            @param rPos
+            Output position
+
+            @param rTransform
+            Output transformation (does not affect output position)
+        */
+        bool draw( double                         fAlpha,
+                   const ::basegfx::B2DPoint&     rPos,
+                   const ::basegfx::B2DHomMatrix& rTransform );
+
+        /** Render the surface content to screen.
+
+            @param fAlpha
+            Overall alpha for content
+
+            @param rPos
+            Output position
+
+            @param rArea
+            Subset of the surface to render. Coordinate system are
+            surface area pixel, given area will be clipped to the
+            surface bounds.
+
+            @param rTransform
+            Output transformation (does not affect output position)
+        */
+        bool drawRectangularArea(
+            double                         fAlpha,
+            const ::basegfx::B2DPoint&     rPos,
+            const ::basegfx::B2DRectangle& rArea,
+            const ::basegfx::B2DHomMatrix& rTransform );
+
+        /** Render the surface content to screen.
+
+            @param fAlpha
+            Overall alpha for content
+
+            @param rPos
+            Output position
+
+            @param rClipPoly
+            Clip polygon for the surface. The clip polygon is also
+            subject to the output transformation.
+
+            @param rTransform
+            Output transformation (does not affect output position)
+        */
+        bool drawWithClip( double                           fAlpha,
+                           const ::basegfx::B2DPoint&       rPos,
+                           const ::basegfx::B2DPolygon&     rClipPoly,
+                           const ::basegfx::B2DHomMatrix&   rTransform );
+
+    private:
+        std::shared_ptr<IColorBuffer> mpColorBuffer;
+
+        // invoking any of the above defined 'draw' methods
+        // will forward primitive commands to the rendermodule.
+        PageManagerSharedPtr  mpPageManager;
+
+        FragmentSharedPtr     mpFragment;
+
+        // the offset of this surface with regard to the source
+        // image. if the source image had to be tiled into multiple
+        // surfaces, this offset denotes the relative pixel distance
+        // from the source image's upper, left corner
+        ::basegfx::B2IPoint   maSourceOffset;
+
+        // the size in pixels of this surface. please note that
+        // this size is likely to be smaller than the size of
+        // the colorbuffer we're associated with since we
+        // maybe represent only a part of it.
+        ::basegfx::B2ISize    maSize;
+
+        bool                  mbIsDirty;
+
+    private:
+        void prepareRendering();
+
+        basegfx::B2DRectangle getUVCoords() const;
+        basegfx::B2DRectangle getUVCoords( const ::basegfx::B2IPoint& rPos,
+                                           const ::basegfx::B2ISize&  rSize ) const;
+    };
+
+    typedef std::shared_ptr< Surface > SurfaceSharedPtr;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */