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author | Kenichi Handa <handa@m17n.org> | 2006-06-06 03:47:13 +0000 |
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committer | Kenichi Handa <handa@m17n.org> | 2006-06-06 03:47:13 +0000 |
commit | c2f5bfd68d0d6bf0e9a176a3a6b110d4a4c048b6 (patch) | |
tree | 725df1f24f2b2da03358dee868d15b4f4585a6aa /src/ftxfont.c | |
parent | 4ed925c6687e25373e8d75e68b9072f1170d571a (diff) | |
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New file.
Diffstat (limited to 'src/ftxfont.c')
-rw-r--r-- | src/ftxfont.c | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/src/ftxfont.c b/src/ftxfont.c new file mode 100644 index 00000000000..af6a96f7060 --- /dev/null +++ b/src/ftxfont.c @@ -0,0 +1,346 @@ +/* ftxfont.c -- FreeType font driver on X (without using XFT). + Copyright (C) 2006 Free Software Foundation, Inc. + Copyright (C) 2006 + National Institute of Advanced Industrial Science and Technology (AIST) + Registration Number H13PRO009 + +This file is part of GNU Emacs. + +GNU Emacs is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Emacs is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Emacs; see the file COPYING. If not, write to +the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +#include <config.h> +#include <stdio.h> +#include <X11/Xlib.h> + +#include "lisp.h" +#include "dispextern.h" +#include "xterm.h" +#include "frame.h" +#include "blockinput.h" +#include "character.h" +#include "charset.h" +#include "fontset.h" +#include "font.h" + +/* FTX font driver. */ + +static Lisp_Object Qftx; + +/* Prototypes for helper function. */ +static int ftxfont_draw_bitmap P_ ((FRAME_PTR, GC *, struct font *, unsigned, + int, int, XPoint *, int, int *n)); +static void ftxfont_draw_backgrond P_ ((FRAME_PTR, struct font *, GC, + int, int, int)); + +static int +ftxfont_draw_bitmap (f, gc, font, code, x, y, p, size, n) + FRAME_PTR f; + GC *gc; + struct font *font; + unsigned code; + int x, y; + XPoint *p; + int size, *n; +{ + struct font_bitmap bitmap; + unsigned char *b; + int i, j; + + if (ftfont_driver.get_bitmap (font, code, &bitmap, 1) < 0) + return 0; + for (i = 0, b = bitmap.buffer; i < bitmap.rows; + i++, b += bitmap.pitch) + { + if (size > 0x100) + { + for (j = 0; j < bitmap.width; j++) + if (b[j / 8] & (1 << (7 - (j % 8)))) + { + p[n[0]].x = x + bitmap.left + j; + p[n[0]].y = y - bitmap.top + i; + if (++n[0] == 0x400) + { + XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), + gc[0], p, size, CoordModeOrigin); + n[0] = 0; + } + } + } + else + { + for (j = 0; j < bitmap.width; j++) + { + int idx = (b[j] >> 5) - 1; + + if (idx >= 0) + { + XPoint *pp = p + size * idx; + + pp[n[idx]].x = x + bitmap.left + j; + pp[n[idx]].y = y - bitmap.top + i; + if (++(n[idx]) == 0x100) + { + XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), + gc[idx], pp, size, CoordModeOrigin); + n[idx] = 0; + } + } + } + } + } + + if (ftfont_driver.free_bitmap) + ftfont_driver.free_bitmap (font, &bitmap); + + return bitmap.advance; +} + +static void +ftxfont_draw_backgrond (f, font, gc, x, y, width) + FRAME_PTR f; + struct font *font; + GC gc; + int x, y, width; +{ + XGCValues xgcv; + + XGetGCValues (FRAME_X_DISPLAY (f), gc, + GCForeground | GCBackground, &xgcv); + XSetForeground (FRAME_X_DISPLAY (f), gc, xgcv.background); + XFillRectangle (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), gc, + x, y - font->ascent, width, font->font.height); + XSetForeground (FRAME_X_DISPLAY (f), gc, xgcv.foreground); +} + +/* Prototypes for font-driver methods. */ +static Lisp_Object ftxfont_list P_ ((Lisp_Object, Lisp_Object)); +static struct font *ftxfont_open P_ ((FRAME_PTR, Lisp_Object, int)); +static void ftxfont_close P_ ((FRAME_PTR, struct font *)); +static int ftxfont_prepare_face (FRAME_PTR, struct face *); +static void ftxfont_done_face (FRAME_PTR, struct face *); + +static int ftxfont_draw P_ ((struct glyph_string *, int, int, int, int, int)); + +struct font_driver ftxfont_driver; + +static Lisp_Object +ftxfont_list (frame, spec) + Lisp_Object frame; + Lisp_Object spec; +{ + Lisp_Object val = ftfont_driver.list (frame, spec); + + if (! NILP (val)) + { + int i; + + for (i = 0; i < ASIZE (val); i++) + ASET (AREF (val, i), FONT_TYPE_INDEX, Qftx); + } + return val; +} + +static struct font * +ftxfont_open (f, entity, pixel_size) + FRAME_PTR f; + Lisp_Object entity; + int pixel_size; +{ + Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f); + struct font *font; + XFontStruct *xfont = malloc (sizeof (XFontStruct)); + + if (! xfont) + return NULL; + font = ftfont_driver.open (f, entity, pixel_size); + if (! font) + { + free (xfont); + return NULL; + } + + xfont->fid = FRAME_FONT (f)->fid; + xfont->ascent = font->ascent; + xfont->descent = font->descent; + xfont->max_bounds.width = font->font.size; + xfont->min_bounds.width = font->min_width; + font->font.font = xfont; + font->driver = &ftxfont_driver; + + dpyinfo->n_fonts++; + + /* Set global flag fonts_changed_p to non-zero if the font loaded + has a character with a smaller width than any other character + before, or if the font loaded has a smaller height than any other + font loaded before. If this happens, it will make a glyph matrix + reallocation necessary. */ + if (dpyinfo->n_fonts == 1) + { + dpyinfo->smallest_font_height = font->font.height; + dpyinfo->smallest_char_width = font->min_width; + fonts_changed_p = 1; + } + else + { + if (dpyinfo->smallest_font_height > font->font.height) + dpyinfo->smallest_font_height = font->font.height, fonts_changed_p |= 1; + if (dpyinfo->smallest_char_width > font->min_width) + dpyinfo->smallest_char_width = font->min_width, fonts_changed_p |= 1; + } + + return font; +} + +static void +ftxfont_close (f, font) + FRAME_PTR f; + struct font *font; +{ + ftfont_driver.close (f, font); + FRAME_X_DISPLAY_INFO (f)->n_fonts--; +} + +static int +ftxfont_prepare_face (f, face) + FRAME_PTR f; + struct face *face; +{ + GC gc[6]; + XColor colors[3]; + XGCValues xgcv; + unsigned long mask = GCForeground | GCBackground | GCGraphicsExposures; + int i; + + face->extra = NULL; + + /* Here, we create 6 more GCs to simulate anti-aliasing. */ + BLOCK_INPUT; + XGetGCValues (FRAME_X_DISPLAY (f), face->gc, mask, &xgcv); + colors[0].pixel = face->foreground; + colors[1].pixel = face->background; + XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), colors, 2); + for (i = 1; i < 7; i++) + { + colors[2].red = (colors[0].red * i + colors[1].red * (7 - i)) / 7; + colors[2].green = (colors[0].green * i + colors[1].green * (7 - i)) / 7; + colors[2].blue = (colors[0].blue * i + colors[1].blue * (7 - i)) / 7; + if (! x_alloc_nearest_color (f, FRAME_X_COLORMAP (f), &colors[2])) + break; + xgcv.foreground = colors[2].pixel; + gc[i - 1] = XCreateGC (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), + mask, &xgcv); + } + UNBLOCK_INPUT; + + if (i < 7) + return -1; + face->extra = malloc (sizeof (GC) * 7); + if (! face->extra) + return -1; + for (i = 0; i < 6; i++) + ((GC *) face->extra)[i] = gc[i]; + ((GC *) face->extra)[i] = face->gc; + return 0; +} + +static void +ftxfont_done_face (f, face) + FRAME_PTR f; + struct face *face; +{ + if (face->extra) + { + int i; + + BLOCK_INPUT; + for (i = 0; i < 7; i++) + XFreeGC (FRAME_X_DISPLAY (f), ((GC *) face->extra)[i]); + UNBLOCK_INPUT; + free (face->extra); + face->extra = NULL; + } +} + +static int +ftxfont_draw (s, from, to, x, y, with_background) + struct glyph_string *s; + int from, to, x, y, with_background; +{ + FRAME_PTR f = s->f; + struct face *face = s->face; + struct font *font = (struct font *) face->font; + XPoint p[0x700]; + int n[7]; + unsigned *code; + int len = to - from; + int i; + + n[0] = n[1] = n[2] = n[3] = n[4] = n[5] = n[6] = 0; + + BLOCK_INPUT; + + if (with_background) + ftxfont_draw_backgrond (f, font, s->gc, x, y, s->width); + code = alloca (sizeof (unsigned) * len); + for (i = 0; i < len; i++) + code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8) + | XCHAR2B_BYTE2 (s->char2b + from + i)); + + if (! face->extra) + { + for (i = 0; i < len; i++) + x += ftxfont_draw_bitmap (f, &face->gc, font, code[i], x, y, + p, 0x700, n); + if (n[0] > 0) + XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), + face->gc, p, n[0], CoordModeOrigin); + } + else + { + GC *gc = face->extra; + + for (i = 0; i < len; i++) + x += ftxfont_draw_bitmap (f, &face->gc, font, code[i], x, y, + p, 0x100, n); + for (i = 0; i < 7; i++) + if (n[i] > 0) + XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), + gc[i], p + 0x100 * i, n[i], CoordModeOrigin); + } + + UNBLOCK_INPUT; + + return len; +} + + + +void +syms_of_ftxfont () +{ + DEFSYM (Qftx, "ftx"); + + ftxfont_driver = ftfont_driver; + ftxfont_driver.type = Qftx; + ftxfont_driver.list = ftxfont_list; + ftxfont_driver.open = ftxfont_open; + ftxfont_driver.close = ftxfont_close; + ftxfont_driver.prepare_face = ftxfont_prepare_face; + ftxfont_driver.done_face = ftxfont_done_face; + ftxfont_driver.draw = ftxfont_draw; + + register_font_driver (&ftxfont_driver, NULL); +} |