WDL/lice/lice_text.h

   1 #ifndef _LICE_TEXT_H_
   2 #define _LICE_TEXT_H_
   3
   4 #include "lice.h"
   5
   6 #include "../heapbuf.h"
   7
   8 #define LICE_FONT_FLAG_VERTICAL 1 // rotate text to vertical (do not set the windows font to vertical though)
   9 #define LICE_FONT_FLAG_VERTICAL_BOTTOMUP 2
  10
  11 #define LICE_FONT_FLAG_PRECALCALL 4
  12 //#define LICE_FONT_FLAG_ALLOW_NATIVE 8
  13 #define LICE_FONT_FLAG_FORCE_NATIVE 1024
  14
  15 #define LICE_FONT_FLAG_FX_BLUR 16
  16 #define LICE_FONT_FLAG_FX_INVERT 32
  17 #define LICE_FONT_FLAG_FX_MONO 64 // faster but no AA/etc
  18
  19 #define LICE_FONT_FLAG_FX_SHADOW 128 // these imply MONO
  20 #define LICE_FONT_FLAG_FX_OUTLINE 256
  21
  22 #define LICE_FONT_FLAG_OWNS_HFONT 512
  23
  24 // could do a mask for these flags
  25 #define LICE_FONT_FLAGS_HAS_FX(flag) \
  26   (flag&(LICE_FONT_FLAG_VERTICAL|LICE_FONT_FLAG_VERTICAL_BOTTOMUP| \
  27          LICE_FONT_FLAG_FX_BLUR|LICE_FONT_FLAG_FX_INVERT|LICE_FONT_FLAG_FX_MONO| \
  28          LICE_FONT_FLAG_FX_SHADOW|LICE_FONT_FLAG_FX_OUTLINE))
  29
  30 #define LICE_DT_NEEDALPHA  0x80000000 // include in DrawText() if the output alpha channel is important
  31 #define LICE_DT_USEFGALPHA 0x40000000 // uses alpha channel in fg color
  32
  33 class LICE_IFont
  34 {
  35   public:
  36     virtual ~LICE_IFont() {}
  37
  38     virtual void SetFromHFont(HFONT font, int flags=0)=0; // hfont must REMAIN valid, unless LICE_FONT_FLAG_PRECALCALL or LICE_FONT_FLAG_OWNS_HFONT set (OWNS means LICE_IFont will clean up hfont on font change or exit)
  39
  40     virtual LICE_pixel SetTextColor(LICE_pixel color)=0;
  41     virtual LICE_pixel SetBkColor(LICE_pixel color)=0;
  42     virtual LICE_pixel SetEffectColor(LICE_pixel color)=0;
  43     virtual int SetBkMode(int bkmode)=0;
  44     virtual void SetCombineMode(int combine, float alpha=1.0f)=0;
  45
  46     virtual int DrawText(LICE_IBitmap *bm, const char *str, int strcnt, RECT *rect, UINT dtFlags)=0;
  47
  48     virtual LICE_pixel GetTextColor()=0;
  49     virtual HFONT GetHFont()=0;
  50     virtual int GetLineHeight()=0;
  51 };
  52
  53
  54 class LICE_CachedFont : public LICE_IFont
  55 {
  56   public:
  57     LICE_CachedFont();
  58     virtual ~LICE_CachedFont();
  59
  60     virtual void SetFromHFont(HFONT font, int flags=0);
  61
  62     virtual LICE_pixel SetTextColor(LICE_pixel color) { LICE_pixel ret=m_fg; m_fg=color; return ret; }
  63     virtual LICE_pixel SetBkColor(LICE_pixel color) { LICE_pixel ret=m_bg; m_bg=color; return ret; }
  64     virtual LICE_pixel SetEffectColor(LICE_pixel color) { LICE_pixel ret=m_effectcol; m_effectcol=color; return ret; }
  65     virtual int SetBkMode(int bkmode) { int bk = m_bgmode; m_bgmode=bkmode; return bk; }
  66     virtual void SetCombineMode(int combine, float alpha=1.0f) { m_comb=combine; m_alpha=alpha; }
  67
  68     virtual int DrawText(LICE_IBitmap *bm, const char *str, int strcnt, RECT *rect, UINT dtFlags)
  69     {
  70       return DrawTextImpl(bm,str,strcnt,rect,dtFlags);
  71     }
  72
  73     virtual LICE_pixel GetTextColor() { return m_fg; }
  74     virtual HFONT GetHFont() { return m_font; }
  75     virtual int GetLineHeight() { return m_line_height; }
  76
  77     void SetLineSpacingAdjust(int amt) { m_lsadj=amt; }
  78
  79   protected:
  80
  81     virtual bool DrawGlyph(LICE_IBitmap *bm, unsigned short c, int xpos, int ypos, RECT *clipR);
  82     int DrawTextImpl(LICE_IBitmap *bm, const char *str, int strcnt, RECT *rect, UINT dtFlags); // cause swell defines DrawText to SWELL_DrawText etc
  83
  84     bool RenderGlyph(unsigned short idx);
  85
  86     LICE_pixel m_fg,m_bg,m_effectcol;
  87     int m_bgmode;
  88     int m_comb;
  89     float m_alpha;
  90     int m_flags;
  91
  92     int m_line_height,m_lsadj;
  93     struct charEnt
  94     {
  95       int base_offset; // offset in m_cachestore+1, so 1=offset0, 0=unset, -1=failed to render
  96       int width, height;
  97       int advance;
  98       int charid; // used by m_extracharlist
  99     };
 100     charEnt *findChar(unsigned short c);
 101
 102     charEnt m_lowchars[128]; // first 128 chars cached here
 103     WDL_TypedBuf<charEnt> m_extracharlist;
 104     WDL_TypedBuf<unsigned char> m_cachestore;
 105
 106     static int _charSortFunc(const void *a, const void *b);
 107
 108     HFONT m_font;
 109
 110 };
 111
 112 #endif//_LICE_TEXT_H_