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-rw-r--r-- | src/lisp.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/lisp.h b/src/lisp.h index 5abde042d7..7d69e76569 100644 --- a/src/lisp.h +++ b/src/lisp.h @@ -579,6 +579,28 @@ typedef unsigned char UCHAR; #define CHAR_SHIFT (0x200000) #define CHAR_CTL (0x400000) #define CHAR_META (0x800000) + + +/* The glyph datatype, used to represent characters on the display. */ + +/* The low eight bits are the character code, and the bits above them + are the numeric face ID. If FID is the face ID of a glyph on a + frame F, then F->display.x->faces[FID] contains the description of + that face. This is an int instead of a short, so we can support a + good bunch of face ID's; given that we have no mechanism for + tossing unused frame face ID's yet, we'll probably run out of 255 + pretty quickly. */ +#define GLYPH unsigned int + +/* Given a character code and a face ID, return the appropriate glyph. */ +#define MAKE_GLYPH(char, face) ((char) | ((face) << 8)) + +/* Return a glyph's character code. */ +#define GLYPH_CHAR(glyph) ((glyph) & 0xff) + +/* Return a glyph's face ID. */ +#define GLYPH_FACE(glyph) (((glyph) >> 8) & 0xff) + /* Data type checking */ |