1 files changed, 279 insertions, 0 deletions
diff --git a/xbmc/guilib/GUIFontTTF.h b/xbmc/guilib/GUIFontTTF.h
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+++ b/xbmc/guilib/GUIFontTTF.h
@@ -0,0 +1,279 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include "GUIFont.h"
+#include "utils/ColorUtils.h"
+#include "utils/Geometry.h"
+
+#include <memory>
+#include <stdint.h>
+#include <string>
+#include <vector>
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include <harfbuzz/hb.h>
+
+#ifdef HAS_DX
+#include <DirectXMath.h>
+#include <DirectXPackedVector.h>
+
+using namespace DirectX;
+using namespace DirectX::PackedVector;
+#endif
+
+class CGraphicContext;
+class CTexture;
+class CRenderSystemBase;
+
+struct FT_FaceRec_;
+struct FT_LibraryRec_;
+struct FT_GlyphSlotRec_;
+struct FT_BitmapGlyphRec_;
+struct FT_StrokerRec_;
+
+typedef struct FT_FaceRec_* FT_Face;
+typedef struct FT_LibraryRec_* FT_Library;
+typedef struct FT_GlyphSlotRec_* FT_GlyphSlot;
+typedef struct FT_BitmapGlyphRec_* FT_BitmapGlyph;
+typedef struct FT_StrokerRec_* FT_Stroker;
+
+typedef uint32_t character_t;
+typedef std::vector<character_t> vecText;
+
+/*!
+ \ingroup textures
+ \brief
+ */
+
+#ifdef HAS_DX
+struct SVertex
+{
+  float x, y, z;
+  XMFLOAT4 col;
+  float u, v;
+  float u2, v2;
+};
+#else
+struct SVertex
+{
+  float x, y, z;
+  unsigned char r, g, b, a;
+  float u, v;
+};
+#endif
+
+#include "GUIFontCache.h"
+
+
+class CGUIFontTTF
+{
+  // use lookup table for the first 4096 glyphs (almost any letter or symbol) to
+  // speed up GUI rendering and decrease CPU usage and less memory reallocations
+  static constexpr int MAX_GLYPH_IDX = 4096;
+  static constexpr size_t LOOKUPTABLE_SIZE = MAX_GLYPH_IDX * FONT_STYLES_COUNT;
+
+  friend class CGUIFont;
+
+public:
+  virtual ~CGUIFontTTF();
+
+  static CGUIFontTTF* CreateGUIFontTTF(const std::string& fontIdent);
+
+  void Clear();
+
+  bool Load(const std::string& strFilename,
+            float height = 20.0f,
+            float aspect = 1.0f,
+            float lineSpacing = 1.0f,
+            bool border = false);
+
+  void Begin();
+  void End();
+  /* The next two should only be called if we've declared we can do hardware clipping */
+  virtual CVertexBuffer CreateVertexBuffer(const std::vector<SVertex>& vertices) const
+  {
+    assert(false);
+    return CVertexBuffer();
+  }
+  virtual void DestroyVertexBuffer(CVertexBuffer& bufferHandle) const {}
+
+  const std::string& GetFontIdent() const { return m_fontIdent; }
+
+protected:
+  explicit CGUIFontTTF(const std::string& fontIdent);
+
+  struct Glyph
+  {
+    hb_glyph_info_t m_glyphInfo{};
+    hb_glyph_position_t m_glyphPosition{};
+
+    Glyph(const hb_glyph_info_t& glyphInfo, const hb_glyph_position_t& glyphPosition)
+      : m_glyphInfo(glyphInfo), m_glyphPosition(glyphPosition)
+    {
+    }
+  };
+
+  struct Character
+  {
+    short m_offsetX;
+    short m_offsetY;
+    float m_left;
+    float m_top;
+    float m_right;
+    float m_bottom;
+    float m_advance;
+    FT_UInt m_glyphIndex;
+    character_t m_glyphAndStyle;
+  };
+
+  struct RunInfo
+  {
+    unsigned int m_startOffset;
+    unsigned int m_endOffset;
+    hb_buffer_t* m_buffer;
+    hb_script_t m_script;
+    hb_glyph_info_t* m_glyphInfos;
+    hb_glyph_position_t* m_glyphPositions;
+  };
+
+  void AddReference();
+  void RemoveReference();
+
+  std::vector<Glyph> GetHarfBuzzShapedGlyphs(const vecText& text);
+
+  float GetTextWidthInternal(const vecText& text);
+  float GetTextWidthInternal(const vecText& text, const std::vector<Glyph>& glyph);
+  float GetCharWidthInternal(character_t ch);
+  float GetTextHeight(float lineSpacing, int numLines) const;
+  float GetTextBaseLine() const { return static_cast<float>(m_cellBaseLine); }
+  float GetLineHeight(float lineSpacing) const;
+  float GetFontHeight() const { return m_height; }
+
+  void DrawTextInternal(CGraphicContext& context,
+                        float x,
+                        float y,
+                        const std::vector<UTILS::COLOR::Color>& colors,
+                        const vecText& text,
+                        uint32_t alignment,
+                        float maxPixelWidth,
+                        bool scrolling);
+
+  float m_height{0.0f};
+
+  // Stuff for pre-rendering for speed
+  Character* GetCharacter(character_t letter, FT_UInt glyphIndex);
+  bool CacheCharacter(FT_UInt glyphIndex, uint32_t style, Character* ch);
+  void RenderCharacter(CGraphicContext& context,
+                       float posX,
+                       float posY,
+                       const Character* ch,
+                       UTILS::COLOR::Color color,
+                       bool roundX,
+                       std::vector<SVertex>& vertices);
+  void ClearCharacterCache();
+
+  virtual std::unique_ptr<CTexture> ReallocTexture(unsigned int& newHeight) = 0;
+  virtual bool CopyCharToTexture(FT_BitmapGlyph bitGlyph,
+                                 unsigned int x1,
+                                 unsigned int y1,
+                                 unsigned int x2,
+                                 unsigned int y2) = 0;
+  virtual void DeleteHardwareTexture() = 0;
+
+  // modifying glyphs
+  void SetGlyphStrength(FT_GlyphSlot slot, int glyphStrength);
+  static void ObliqueGlyph(FT_GlyphSlot slot);
+
+  std::unique_ptr<CTexture>
+      m_texture; // texture that holds our rendered characters (8bit alpha only)
+
+  unsigned int m_textureWidth{0}; // width of our texture
+  unsigned int m_textureHeight{0}; // height of our texture
+  int m_posX{0}; // current position in the texture
+  int m_posY{0};
+
+  /*! \brief the height of each line in the texture.
+   Accounts for spacing between lines to avoid characters overlapping.
+   */
+  unsigned int GetTextureLineHeight() const;
+  unsigned int GetMaxFontHeight() const;
+
+  UTILS::COLOR::Color m_color{UTILS::COLOR::NONE};
+
+  std::vector<Character> m_char; // our characters
+
+  // room for the first MAX_GLYPH_IDX glyphs in 7 styles
+  Character* m_charquick[LOOKUPTABLE_SIZE]{nullptr};
+
+  bool m_ellipseCached{false};
+  float m_ellipsesWidth{0.0f}; // this is used every character (width of '.')
+
+  unsigned int m_cellBaseLine{0};
+  unsigned int m_cellHeight{0};
+  unsigned int m_maxFontHeight{0};
+
+  unsigned int m_nestedBeginCount{0}; // speedups
+
+  // freetype stuff
+  FT_Face m_face{nullptr};
+  FT_Stroker m_stroker{nullptr};
+
+  hb_font_t* m_hbFont{nullptr};
+
+  float m_originX{0.0f};
+  float m_originY{0.0f};
+
+  unsigned int m_nTexture{0};
+
+  struct CTranslatedVertices
+  {
+    float m_translateX;
+    float m_translateY;
+    float m_translateZ;
+    const CVertexBuffer* m_vertexBuffer;
+    CRect m_clip;
+    CTranslatedVertices(float translateX,
+                        float translateY,
+                        float translateZ,
+                        const CVertexBuffer* vertexBuffer,
+                        const CRect& clip)
+      : m_translateX(translateX),
+        m_translateY(translateY),
+        m_translateZ(translateZ),
+        m_vertexBuffer(vertexBuffer),
+        m_clip(clip)
+    {
+    }
+  };
+  std::vector<CTranslatedVertices> m_vertexTrans;
+  std::vector<SVertex> m_vertex;
+
+  float m_textureScaleX{0.0f};
+  float m_textureScaleY{0.0f};
+
+  const std::string m_fontIdent;
+  std::vector<uint8_t>
+      m_fontFileInMemory; // used only in some cases, see CFreeTypeLibrary::GetFont()
+
+  CGUIFontCache<CGUIFontCacheStaticPosition, CGUIFontCacheStaticValue> m_staticCache;
+  CGUIFontCache<CGUIFontCacheDynamicPosition, CGUIFontCacheDynamicValue> m_dynamicCache;
+
+  CRenderSystemBase* m_renderSystem;
+
+private:
+  float GetTabSpaceLength();
+
+  virtual bool FirstBegin() = 0;
+  virtual void LastEnd() = 0;
+  CGUIFontTTF(const CGUIFontTTF&) = delete;
+  CGUIFontTTF& operator=(const CGUIFontTTF&) = delete;
+  int m_referenceCount{0};
+};