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         font_mgr();
  22         ~font_mgr();
  23
  24         void *register_font(HDC font_holder, const LOGFONTW *log_font, BYTE **outline_metrics_buf, unsigned long *outline_metrics_size);
  25         HFONT select_font(void *font_id, HDC hdc) const;
  26
  27         ULONG lookup_face_index(void *font_id) const;
  28         const os2_metrics *lookup_os2_metrics(void *font_id) const;
  29         FT_Stream lookup_stream(void *font_id) const;
  30
  31         HDC get_thread_font_holder() const;
  32         BOOL set_thread_font_holder(HDC font_holder) const;
  33
  34 private:
  35         struct _font_entry
  36         {
  37                 // all fields are font-specific and thread-safe invariants
  38
  39                 HFONT font_handle;
  40                 os2_metrics os2;
  41                 FT_StreamRec stream;
  42
  43                 // used to retrieve font data from GetFontData
  44                 DWORD face_index;
  45                 DWORD table_header;
  46         };
  47
  48         static unsigned long get_dc_outline_metrics(HDC hdc, BYTE **outline_metrics_buf);
  49         static unsigned long stream_io(FT_Stream stream, unsigned long offset, unsigned char *buffer, unsigned long count);
  50         static void stream_close(FT_Stream stream);
  51
  52         std::map<std::wstring, _font_entry> _font_registry;
  53         DWORD _font_holder_tls_index;
  54 };
  55
  56 }