Second Life viewer sources 1.13.2.12

1 files changed, 188 insertions, 0 deletions

diff --git a/linden/indra/llrender/llfont.h b/linden/indra/llrender/llfont.h
new file mode 100644
index 0000000..dadeafd
--- /dev/null
+++ b/linden/indra/llrender/llfont.h
@@ -0,0 +1,188 @@
+/** 
+ * @file llfont.h
+ * @brief Font library wrapper
+ *
+ * Copyright (c) 2002-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#ifndef LL_LLFONT_H
+#define LL_LLFONT_H
+
+#include <map>
+//#include "lllocalidhashmap.h"
+#include "llmemory.h"
+
+class LLImageRaw;
+class LLFontManager;
+class LLFont;
+
+// Hack.  FT_Face is just a typedef for a pointer to a struct,
+// but there's no simple forward declarations file for FreeType, 
+// and the main include file is 200K.  
+// We'll forward declare the struct here.  JC
+struct FT_FaceRec_;
+typedef struct FT_FaceRec_* LLFT_Face;
+
+extern LLFontManager *gFontManagerp;
+
+class LLFontManager
+{
+public:
+        static void initClass();
+        static void cleanupClass();
+        
+public:
+        LLFontManager();
+        virtual ~LLFontManager();
+};
+
+class LLFontGlyphInfo
+{
+public:
+        LLFontGlyphInfo(U32 index);
+public:
+        U32 mGlyphIndex;
+        // Metrics
+        S32 mWidth;                     // In pixels
+        S32 mHeight;            // In pixels
+        F32 mXAdvance;          // In pixels
+        F32 mYAdvance;          // In pixels
+
+        // Information for actually rendering
+        BOOL mIsRendered;       // We actually have rendered this glyph
+        S32 mXBitmapOffset; // Offset to the origin in the bitmap
+        S32 mYBitmapOffset; // Offset to the origin in the bitmap
+        S32 mXBearing;  // Distance from baseline to left in pixels
+        S32 mYBearing;  // Distance from baseline to top in pixels
+};
+
+// Used for lists of fallback fonts
+class LLFontList : public std::vector<LLFont*>
+{
+public:
+        LLFontList();
+        ~LLFontList();
+        void addAtEnd(LLFont *font);
+};
+
+
+class LLFont
+{
+public:
+        LLFont(LLImageRaw *imagep = NULL);
+        virtual ~LLFont();
+
+        // is_fallback should be true for fallback fonts that aren't used to render directly (Unicode backup, primarily)
+        virtual BOOL loadFace(const std::string& filename,
+                                                        const F32 point_size,
+                                                        const F32 vert_dpi,
+                                                        const F32 horz_dpi,
+                                                        const S32 components,
+                                                        BOOL is_fallback);
+        void setFallbackFont(LLFontList *fontp)         { mFallbackFontp = fontp; }
+
+        void setCharToGlyphMap(llwchar wch, U32 glyph_index) const;
+        void setRawImage( LLImageRaw *imagep );
+
+        // Global font metrics - in units of pixels
+        virtual F32 getLineHeight() const;
+        virtual F32 getAscenderHeight() const;
+        virtual F32 getDescenderHeight() const;
+
+
+// For a lowercase "g":
+//
+//      ------------------------------
+//                           ^     ^
+//                                               |     |
+//                              xxx x    |Ascender
+//                 x   x     |     |
+//      ---------   xxxx-------------- Baseline
+//      ^                      x         |     |
+//  | descender    x     |     |
+//      v                       xxxx     v     |LineHeight
+//  -----------------------    |
+//                             v
+//      ------------------------------
+
+        enum
+        {
+                FIRST_CHAR = 32, 
+                NUM_CHARS = 127 - 32, 
+                LAST_CHAR_BASIC = 127,
+
+                // Need full 8-bit ascii range for spanish
+                NUM_CHARS_FULL = 255 - 32,
+                LAST_CHAR_FULL = 255
+        };
+
+        const LLFontGlyphInfo &getMetrics(const llwchar wc) const;
+        F32 getXAdvance(const llwchar wc) const;
+        F32 getXKerning(const llwchar char_left, const llwchar char_right) const; // Get the kerning between the two characters
+protected:
+        virtual BOOL hasGlyph(const llwchar wch) const;         // Has a glyph for this character
+        virtual BOOL addChar(const llwchar wch);                // Add a new character to the font if necessary
+        virtual BOOL addGlyph(const llwchar wch, const U32 glyph_index);        // Add a new glyph to the existing font
+        virtual BOOL addGlyphFromFont(LLFont *fontp, const llwchar wch, const U32 glyph_index); // Add a glyph from this font to the other (returns the glyph_index, 0 if not found)
+
+        virtual LLFontGlyphInfo* getGlyphInfo(const llwchar wch) const;
+
+        void insertGlyphInfo(llwchar wch, LLFontGlyphInfo* gi) const;
+        void renderGlyph(const U32 glyph_index);
+
+        void resetBitmap();     // Reset bitmap to contain only the null glyph
+protected:
+        std::string mName;
+        F32 mAscender;                  
+        F32 mDescender;
+        F32 mLineHeight;
+
+        S32 mNumComponents;
+        S32 mBitmapWidth;
+        S32 mBitmapHeight;
+        S32 mMaxCharWidth;
+        S32 mMaxCharHeight;
+        S32 mCurrentOffsetX;
+        S32 mCurrentOffsetY;
+
+        LLFT_Face mFTFace;
+
+        BOOL mIsFallback;
+        LLFontList *mFallbackFontp; // A list of fallback fonts to look for glyphs in (for Unicode chars)
+
+        typedef std::map<llwchar, LLFontGlyphInfo*> char_glyph_info_map_t;
+        mutable char_glyph_info_map_t mCharGlyphInfoMap; // Information about glyph location in bitmap
+
+        BOOL mValid;
+        void setSubImageLuminanceAlpha(const U32 x,
+                                       const U32 y,
+                                       const U32 width,
+                                       const U32 height,
+                                       const U8 *data,
+                                       S32 stride = 0);
+
+private:
+        LLPointer<LLImageRaw> mRawImagep;       // Bitmaps of glyphs are stored here.
+};
+
+#endif // LL_FONT_