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