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-rw-r--r--canvas/source/opengl/ogl_texturecache.hxx60
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diff --git a/canvas/source/opengl/ogl_texturecache.hxx b/canvas/source/opengl/ogl_texturecache.hxx
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+++ b/canvas/source/opengl/ogl_texturecache.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/.
+ */
+
+#pragma once
+
+#include <sal/types.h>
+#include <unordered_map>
+
+namespace com::sun::star::geometry { struct IntegerSize2D; }
+
+
+namespace oglcanvas
+{
+ class TextureCache
+ {
+ public:
+ TextureCache();
+ ~TextureCache();
+
+ /// clear whole cache, reset statistic counters
+ void flush();
+
+ /** prune old entries from cache
+
+ Every time this method is called, all cache entries are set
+ to "old". If subsequently not used by getTexture(),
+ they'll be entitled for expunge on the next prune()
+ call. Resets statistic counters.
+ */
+ void prune();
+
+ /// Statistics
+ size_t getCacheSize() const { return maCache.size(); };
+ sal_uInt32 getCacheMissCount() const { return mnMissCount; }
+ sal_uInt32 getCacheHitCount() const { return mnHitCount; }
+
+ unsigned int getTexture( const css::geometry::IntegerSize2D& rPixelSize,
+ const sal_Int8* pPixel,
+ sal_uInt32 nPixelCrc32) const;
+ private:
+ struct CacheEntry
+ {
+ CacheEntry() : nTexture(0), bOld(false) {}
+ unsigned int nTexture;
+ bool bOld;
+ };
+ typedef std::unordered_map<sal_uInt32,CacheEntry> TextureCacheMapT;
+ mutable TextureCacheMapT maCache;
+ mutable sal_uInt32 mnMissCount;
+ mutable sal_uInt32 mnHitCount;
+ };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */