/* ftxfont.c -- FreeType font driver on X (without using XFT).
- Copyright (C) 2006 Free Software Foundation, Inc.
- Copyright (C) 2006
+ Copyright (C) 2006-2011 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
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
+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.
+the Free Software Foundation, either version 3 of the License, 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
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. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdio.h>
+#include <setjmp.h>
#include <X11/Xlib.h>
#include "lisp.h"
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 GC *ftxfont_get_gcs (FRAME_PTR, unsigned long, unsigned long);
+static int ftxfont_draw_bitmap (FRAME_PTR, GC, GC *, struct font *,
+ unsigned, int, int, XPoint *, int, int *,
+ int);
+static void ftxfont_draw_backgrond (FRAME_PTR, struct font *, GC,
+ int, int, int);
+
+struct ftxfont_frame_data
+{
+ /* Background and foreground colors. */
+ XColor colors[2];
+ /* GCs interporationg the above colors. gcs[0] is for a color
+ closest to BACKGROUND, and gcs[5] is for a color closest to
+ FOREGROUND. */
+ GC gcs[6];
+ struct ftxfont_frame_data *next;
+};
+
+
+/* Return an array of 6 GCs for antialiasing. */
+
+static GC *
+ftxfont_get_gcs (FRAME_PTR f, long unsigned int foreground, long unsigned int background)
+{
+ XColor color;
+ XGCValues xgcv;
+ int i;
+ struct ftxfont_frame_data *data = font_get_frame_data (f, &ftxfont_driver);
+ struct ftxfont_frame_data *prev = NULL, *this = NULL, *new;
+
+ if (data)
+ {
+ for (this = data; this; prev = this, this = this->next)
+ {
+ if (this->colors[0].pixel < background)
+ continue;
+ if (this->colors[0].pixel > background)
+ break;
+ if (this->colors[1].pixel < foreground)
+ continue;
+ if (this->colors[1].pixel > foreground)
+ break;
+ return this->gcs;
+ }
+ }
+
+ new = malloc (sizeof (struct ftxfont_frame_data));
+ if (! new)
+ return NULL;
+ new->next = this;
+ if (prev)
+ {
+ prev->next = new;
+ }
+ else if (font_put_frame_data (f, &ftxfont_driver, new) < 0)
+ {
+ free (new);
+ return NULL;
+ }
+
+ new->colors[0].pixel = background;
+ new->colors[1].pixel = foreground;
+
+ BLOCK_INPUT;
+ XQueryColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f), new->colors, 2);
+ for (i = 1; i < 7; i++)
+ {
+ /* Interpolate colors linearly. Any better algorithm? */
+ color.red
+ = (new->colors[1].red * i + new->colors[0].red * (8 - i)) / 8;
+ color.green
+ = (new->colors[1].green * i + new->colors[0].green * (8 - i)) / 8;
+ color.blue
+ = (new->colors[1].blue * i + new->colors[0].blue * (8 - i)) / 8;
+ if (! x_alloc_nearest_color (f, FRAME_X_COLORMAP (f), &color))
+ break;
+ xgcv.foreground = color.pixel;
+ new->gcs[i - 1] = XCreateGC (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ GCForeground, &xgcv);
+ }
+ UNBLOCK_INPUT;
+
+ if (i < 7)
+ {
+ BLOCK_INPUT;
+ for (i--; i >= 0; i--)
+ XFreeGC (FRAME_X_DISPLAY (f), new->gcs[i]);
+ UNBLOCK_INPUT;
+ if (prev)
+ prev->next = new->next;
+ else if (data)
+ font_put_frame_data (f, &ftxfont_driver, new->next);
+ free (new);
+ return NULL;
+ }
+ return new->gcs;
+}
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;
+ftxfont_draw_bitmap (FRAME_PTR f, GC gc_fore, GC *gcs, struct font *font, unsigned int code, int x, int y, XPoint *p, int size, int *n, int flush)
{
struct font_bitmap bitmap;
unsigned char *b;
int i, j;
- if (ftfont_driver.get_bitmap (font, code, &bitmap, 1) < 0)
+ if (ftfont_driver.get_bitmap (font, code, &bitmap, size > 0x100 ? 1 : 8) < 0)
return 0;
- for (i = 0, b = bitmap.buffer; i < bitmap.rows;
- i++, b += bitmap.pitch)
+ if (size > 0x100)
{
- if (size > 0x100)
+ for (i = 0, b = bitmap.buffer; i < bitmap.rows;
+ i++, b += bitmap.pitch)
{
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)
+ if (++n[0] == size)
{
XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
- gc[0], p, size, CoordModeOrigin);
+ gc_fore, p, size, CoordModeOrigin);
n[0] = 0;
}
}
}
- else
+ if (flush && n[0] > 0)
+ XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ gc_fore, p, n[0], CoordModeOrigin);
+ }
+ else
+ {
+ for (i = 0, b = bitmap.buffer; i < bitmap.rows;
+ i++, b += bitmap.pitch)
{
for (j = 0; j < bitmap.width; j++)
{
- int idx = (b[j] >> 5) - 1;
+ int idx = (bitmap.bits_per_pixel == 1
+ ? ((b[j / 8] & (1 << (7 - (j % 8)))) ? 6 : -1)
+ : (b[j] >> 5) - 1);
if (idx >= 0)
{
pp[n[idx]].x = x + bitmap.left + j;
pp[n[idx]].y = y - bitmap.top + i;
- if (++(n[idx]) == 0x100)
+ if (++(n[idx]) == size)
{
XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
- gc[idx], pp, size, CoordModeOrigin);
+ idx == 6 ? gc_fore : gcs[idx], pp, size,
+ CoordModeOrigin);
n[idx] = 0;
}
}
}
}
+ if (flush)
+ {
+ for (i = 0; i < 6; i++)
+ if (n[i] > 0)
+ XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ gcs[i], p + 0x100 * i, n[i], CoordModeOrigin);
+ if (n[6] > 0)
+ XDrawPoints (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+ gc_fore, p + 0x600, n[6], CoordModeOrigin);
+ }
}
if (ftfont_driver.free_bitmap)
}
static void
-ftxfont_draw_backgrond (f, font, gc, x, y, width)
- FRAME_PTR f;
- struct font *font;
- GC gc;
- int x, y, width;
+ftxfont_draw_backgrond (FRAME_PTR f, struct font *font, GC gc, int x, int y, int width)
{
XGCValues xgcv;
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);
+ x, y - FONT_BASE (font), width, FONT_HEIGHT (font));
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));
+static Lisp_Object ftxfont_list (Lisp_Object, Lisp_Object);
+static Lisp_Object ftxfont_match (Lisp_Object, Lisp_Object);
+static Lisp_Object ftxfont_open (FRAME_PTR, Lisp_Object, int);
+static void ftxfont_close (FRAME_PTR, struct font *);
+static int ftxfont_draw (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;
+ftxfont_list (Lisp_Object frame, Lisp_Object spec)
{
- Lisp_Object val = ftfont_driver.list (frame, spec);
+ Lisp_Object list = ftfont_driver.list (frame, spec), tail;
- if (! NILP (val))
- {
- int i;
-
- for (i = 0; i < ASIZE (val); i++)
- ASET (AREF (val, i), FONT_TYPE_INDEX, Qftx);
- }
- return val;
+ for (tail = list; CONSP (tail); tail = XCDR (tail))
+ ASET (XCAR (tail), FONT_TYPE_INDEX, Qftx);
+ return list;
}
-static struct font *
-ftxfont_open (f, entity, pixel_size)
- FRAME_PTR f;
- Lisp_Object entity;
- int pixel_size;
+static Lisp_Object
+ftxfont_match (Lisp_Object frame, Lisp_Object spec)
{
- 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++;
+ Lisp_Object entity = ftfont_driver.match (frame, spec);
- /* 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--;
+ if (VECTORP (entity))
+ ASET (entity, FONT_TYPE_INDEX, Qftx);
+ return entity;
}
-static int
-ftxfont_prepare_face (f, face)
- FRAME_PTR f;
- struct face *face;
+static Lisp_Object
+ftxfont_open (FRAME_PTR f, Lisp_Object entity, int pixel_size)
{
- 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;
+ Lisp_Object font_object;
+ struct font *font;
- 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;
+ font_object = ftfont_driver.open (f, entity, pixel_size);
+ if (NILP (font_object))
+ return Qnil;
+ font = XFONT_OBJECT (font_object);
+ font->driver = &ftxfont_driver;
+ return font_object;
}
static void
-ftxfont_done_face (f, face)
- FRAME_PTR f;
- struct face *face;
+ftxfont_close (FRAME_PTR f, struct font *font)
{
- 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;
- }
+ ftfont_driver.close (f, font);
}
static int
-ftxfont_draw (s, from, to, x, y, with_background)
- struct glyph_string *s;
- int from, to, x, y, with_background;
+ftxfont_draw (struct glyph_string *s, int from, int to, int x, int y, int with_background)
{
FRAME_PTR f = s->f;
struct face *face = s->face;
- struct font *font = (struct font *) face->font;
+ struct font *font = s->font;
XPoint p[0x700];
int n[7];
unsigned *code;
int len = to - from;
int i;
+ GC *gcs;
+ int xadvance;
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);
code[i] = ((XCHAR2B_BYTE1 (s->char2b + from + i) << 8)
| XCHAR2B_BYTE2 (s->char2b + from + i));
- if (! face->extra)
+ if (face->gc == s->gc)
{
- 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);
+ gcs = ftxfont_get_gcs (f, face->foreground, face->background);
}
else
{
- GC *gc = face->extra;
+ XGCValues xgcv;
+ unsigned long mask = GCForeground | GCBackground;
+
+ XGetGCValues (FRAME_X_DISPLAY (f), s->gc, mask, &xgcv);
+ gcs = ftxfont_get_gcs (f, xgcv.foreground, xgcv.background);
+ }
+
+ if (gcs)
+ {
+ if (s->num_clips)
+ for (i = 0; i < 6; i++)
+ XSetClipRectangles (FRAME_X_DISPLAY (f), gcs[i], 0, 0,
+ s->clip, s->num_clips, Unsorted);
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);
+ {
+ xadvance = ftxfont_draw_bitmap (f, s->gc, gcs, font, code[i], x, y,
+ p, 0x100, n, i + 1 == len);
+ x += (s->padding_p ? 1 : xadvance);
+ }
+ if (s->num_clips)
+ for (i = 0; i < 6; i++)
+ XSetClipMask (FRAME_X_DISPLAY (f), gcs[i], None);
+ }
+ else
+ {
+ /* We can't draw with antialiasing.
+ s->gc should already have a proper clipping setting. */
+ for (i = 0; i < len; i++)
+ {
+ xadvance = ftxfont_draw_bitmap (f, s->gc, NULL, font, code[i], x, y,
+ p, 0x700, n, i + 1 == len);
+ x += (s->padding_p ? 1 : xadvance);
+ }
}
UNBLOCK_INPUT;
return len;
}
+static int
+ftxfont_end_for_frame (FRAME_PTR f)
+{
+ struct ftxfont_frame_data *data = font_get_frame_data (f, &ftxfont_driver);
+
+ BLOCK_INPUT;
+ while (data)
+ {
+ struct ftxfont_frame_data *next = data->next;
+ int i;
+
+ for (i = 0; i < 6; i++)
+ XFreeGC (FRAME_X_DISPLAY (f), data->gcs[i]);
+ free (data);
+ data = next;
+ }
+ UNBLOCK_INPUT;
+ font_put_frame_data (f, &ftxfont_driver, NULL);
+ return 0;
+}
+
\f
void
-syms_of_ftxfont ()
+syms_of_ftxfont (void)
{
DEFSYM (Qftx, "ftx");
ftxfont_driver = ftfont_driver;
ftxfont_driver.type = Qftx;
ftxfont_driver.list = ftxfont_list;
+ ftxfont_driver.match = ftxfont_match;
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;
-
+ ftxfont_driver.end_for_frame = ftxfont_end_for_frame;
register_font_driver (&ftxfont_driver, NULL);
}
-/* arch-tag: 59bd3469-5330-413f-b29d-1aa36492abe8
- (do not change this comment) */