82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/**
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* @file llfontbitmapcache.h
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* @brief Storage for previously rendered glyphs.
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*
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* $LicenseInfo:firstyear=2008&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLFONTBITMAPCACHE_H
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#define LL_LLFONTBITMAPCACHE_H
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#include <vector>
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#include "lltrace.h"
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enum class EFontGlyphType : U32
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{
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Grayscale = 0,
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Color,
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Count,
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Unspecified,
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};
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// Maintain a collection of bitmaps containing rendered glyphs.
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// Generalizes the single-bitmap logic from LLFontFreetype and LLFontGL.
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class LLFontBitmapCache
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{
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public:
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LLFontBitmapCache();
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~LLFontBitmapCache();
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// Need to call this once, before caching any glyphs.
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void init(S32 max_char_width,
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S32 max_char_height);
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void reset();
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bool nextOpenPos(S32 width, S32& posX, S32& posY, EFontGlyphType bitmapType, U32& bitmapNum);
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void destroyGL();
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LLImageRaw* getImageRaw(EFontGlyphType bitmapType, U32 bitmapNum) const;
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LLImageGL* getImageGL(EFontGlyphType bitmapType, U32 bitmapNum) const;
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S32 getMaxCharWidth() const { return mMaxCharWidth; }
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U32 getNumBitmaps(EFontGlyphType bitmapType) const { return (bitmapType < EFontGlyphType::Count) ? mImageRawVec[static_cast<U32>(bitmapType)].size() : 0; }
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S32 getBitmapWidth() const { return mBitmapWidth; }
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S32 getBitmapHeight() const { return mBitmapHeight; }
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protected:
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static U32 getNumComponents(EFontGlyphType bitmap_type);
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private:
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S32 mBitmapWidth = 0;
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S32 mBitmapHeight = 0;
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S32 mCurrentOffsetX[static_cast<U32>(EFontGlyphType::Count)] = { 1 };
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S32 mCurrentOffsetY[static_cast<U32>(EFontGlyphType::Count)] = { 1 };
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S32 mMaxCharWidth = 0;
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S32 mMaxCharHeight = 0;
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std::vector<LLPointer<LLImageRaw>> mImageRawVec[static_cast<U32>(EFontGlyphType::Count)];
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std::vector<LLPointer<LLImageGL>> mImageGLVec[static_cast<U32>(EFontGlyphType::Count)];
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};
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#endif //LL_LLFONTBITMAPCACHE_H
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