gdipp_server/font_mgr.h

   1 #pragma once
   2
   3 #include "gdipp_server/os2_metrics.h"
   4
   5 namespace gdipp
   6 {
   7
   8 #define buf_family_name(metric_buf) (reinterpret_cast<const wchar_t *>(metric_buf + reinterpret_cast<const UINT>((reinterpret_cast<const OUTLINETEXTMETRICW *>(metric_buf)->otmpFamilyName))))
   9 #define buf_face_name(metric_buf) (reinterpret_cast<const wchar_t *>(metric_buf + reinterpret_cast<const UINT>((reinterpret_cast<const OUTLINETEXTMETRICW *>(metric_buf)->otmpFaceName))))
  10 #define buf_style_name(metric_buf) (reinterpret_cast<const wchar_t *>(metric_buf + reinterpret_cast<const UINT>((reinterpret_cast<const OUTLINETEXTMETRICW *>(metric_buf)->otmpStyleName))))
  11 #define metric_family_name(outline_metric) (reinterpret_cast<const wchar_t *>(reinterpret_cast<const BYTE *>(outline_metric) + reinterpret_cast<const UINT>(outline_metric->otmpFamilyName)))
  12 #define metric_face_name(outline_metric) (reinterpret_cast<const wchar_t *>(reinterpret_cast<const BYTE *>(outline_metric) + reinterpret_cast<const UINT>(outline_metric->otmpFaceName)))
  13 #define metric_style_name(outline_metric) (reinterpret_cast<const wchar_t *>(reinterpret_cast<const BYTE *>(outline_metric) + reinterpret_cast<const UINT>(outline_metric->otmpStyleName)))
  14
  15 class font_mgr
  16 {
  17 public:
  18         static DWORD get_font_size(HDC font_holder, DWORD *table_header);
  19         static ULONG get_ttc_face_index(HDC font_holder, DWORD ttc_file_size);
  20
  21         void *register_font(const LOGFONTW *log_font, BYTE **outline_metrics_buf, unsigned long *outline_metrics_size, HDC hdc = NULL);
  22         HFONT select_font(void *font_id, HDC hdc) const;
  23
  24         ULONG lookup_face_index(void *font_id) const;
  25         DWORD lookup_font_data(void *font_id, DWORD table, DWORD offset, LPVOID data_buf, DWORD buf_size, HDC hdc = NULL) const;
  26         DWORD lookup_glyph_indices(void *font_id, const wchar_t *str, int count, unsigned short *gi, HDC hdc = NULL) const;
  27         const os2_metrics *lookup_os2_metrics(void *font_id) const;
  28         FT_Stream lookup_stream(void *font_id) const;
  29
  30 private:
  31         struct font_entry
  32         {
  33                 // all fields are font-specific invariants
  34
  35                 HFONT font_handle;
  36                 os2_metrics os2;
  37                 FT_StreamRec stream;
  38
  39                 // used to retrieve font data from GetFontData
  40                 DWORD face_index;
  41                 DWORD table_header;
  42         };
  43
  44         static unsigned long get_dc_outline_metrics(HDC hdc, BYTE **outline_metrics_buf);
  45         static unsigned long stream_io(FT_Stream stream, unsigned long offset, unsigned char *buffer, unsigned long count);
  46         static void stream_close(FT_Stream stream);
  47
  48         std::map<std::wstring, font_entry> _font_registry;
  49 };
  50
  51 }