-/* texfonts, Copyright (c) 2005-2013 Jamie Zawinski <jwz@jwz.org>
- * Loads X11 fonts into textures for use with OpenGL.
+/* texfonts, Copyright (c) 2005-2014 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
+ *
+ * Renders X11 fonts into textures for use with OpenGL.
+ * A higher level API is in glxfonts.c.
*/
-
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "resources.h"
#include "texfont.h"
+#define DO_SUBSCRIPTS
+
+
/* These are in xlock-gl.c */
extern void clear_gl_error (void);
extern void check_gl_error (const char *type);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
mipmap_p ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
+
+ /* This makes scaled font pixmaps tolerable to look at.
+ LOD bias is part of OpenGL 1.4.
+ GL_EXT_texture_lod_bias has been present since the original iPhone.
+ */
+# if !defined(GL_TEXTURE_LOD_BIAS) && defined(GL_TEXTURE_LOD_BIAS_EXT)
+# define GL_TEXTURE_LOD_BIAS GL_TEXTURE_LOD_BIAS_EXT
+# endif
+# ifdef GL_TEXTURE_LOD_BIAS
+ if (mipmap_p)
+ glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, 0.25);
+# endif
+ clear_gl_error(); /* invalid enum on iPad 3 */
+
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
-/* Loads the font named by the X resource "res" and returns
- a texture-font object.
-*/
-texture_font_data *
-load_texture_font (Display *dpy, char *res)
+static texture_font_data *
+load_texture_xfont (Display *dpy, XFontStruct *f)
{
Screen *screen = DefaultScreenOfDisplay (dpy);
Window root = RootWindowOfScreen (screen);
XWindowAttributes xgwa;
-
- texture_font_data *data = 0;
- char *font = get_string_resource (dpy, res, "Font");
- const char *def1 = "-*-helvetica-medium-r-normal-*-240-*";
- const char *def2 = "-*-helvetica-medium-r-normal-*-180-*";
- const char *def3 = "fixed";
- XFontStruct *f;
int which;
GLint old_texture = 0;
+ texture_font_data *data = 0;
glGetIntegerv (GL_TEXTURE_BINDING_2D, &old_texture);
- if (!strcmp (res, "fpsFont"))
- def1 = "-*-courier-bold-r-normal-*-180-*"; /* Kludge. Sue me. */
-
XGetWindowAttributes (dpy, root, &xgwa);
- if (!res || !*res) abort();
- if (!font) font = strdup(def1);
-
- f = XLoadQueryFont(dpy, font);
- if (!f && !!strcmp (font, def1))
- {
- fprintf (stderr, "%s: unable to load font \"%s\", using \"%s\"\n",
- progname, font, def1);
- free (font);
- font = strdup (def1);
- f = XLoadQueryFont(dpy, font);
- }
-
- if (!f && !!strcmp (font, def2))
- {
- fprintf (stderr, "%s: unable to load font \"%s\", using \"%s\"\n",
- progname, font, def2);
- free (font);
- font = strdup (def2);
- f = XLoadQueryFont(dpy, font);
- }
-
- if (!f && !!strcmp (font, def3))
- {
- fprintf (stderr, "%s: unable to load font \"%s\", using \"%s\"\n",
- progname, font, def3);
- free (font);
- font = strdup (def3);
- f = XLoadQueryFont(dpy, font);
- }
-
- if (!f)
- {
- fprintf (stderr, "%s: unable to load fallback font \"%s\" either!\n",
- progname, font);
- exit (1);
- }
-
- free (font);
- font = 0;
-
data = (texture_font_data *) calloc (1, sizeof(*data));
data->dpy = dpy;
data->font = f;
}
-/* Width of the string in pixels.
+/* Loads the font named by the X resource "res" and returns
+ a texture-font object.
+*/
+texture_font_data *
+load_texture_font (Display *dpy, char *res)
+{
+ char *font = get_string_resource (dpy, res, "Font");
+ const char *def1 = "-*-helvetica-medium-r-normal-*-240-*";
+ const char *def2 = "-*-helvetica-medium-r-normal-*-180-*";
+ const char *def3 = "fixed";
+ XFontStruct *f;
+
+ if (!strcmp (res, "fpsFont"))
+ def1 = "-*-courier-bold-r-normal-*-180-*"; /* Kludge. Sue me. */
+
+ if (!res || !*res) abort();
+ if (!font) font = strdup(def1);
+
+ f = XLoadQueryFont(dpy, font);
+ if (!f && !!strcmp (font, def1))
+ {
+ fprintf (stderr, "%s: unable to load font \"%s\", using \"%s\"\n",
+ progname, font, def1);
+ free (font);
+ font = strdup (def1);
+ f = XLoadQueryFont(dpy, font);
+ }
+
+ if (!f && !!strcmp (font, def2))
+ {
+ fprintf (stderr, "%s: unable to load font \"%s\", using \"%s\"\n",
+ progname, font, def2);
+ free (font);
+ font = strdup (def2);
+ f = XLoadQueryFont(dpy, font);
+ }
+
+ if (!f && !!strcmp (font, def3))
+ {
+ fprintf (stderr, "%s: unable to load font \"%s\", using \"%s\"\n",
+ progname, font, def3);
+ free (font);
+ font = strdup (def3);
+ f = XLoadQueryFont(dpy, font);
+ }
+
+ if (!f)
+ {
+ fprintf (stderr, "%s: unable to load fallback font \"%s\" either!\n",
+ progname, font);
+ exit (1);
+ }
+
+ free (font);
+ font = 0;
+
+ return load_texture_xfont (dpy, f);
+}
+
+
+/* Bounding box of the multi-line string, in pixels.
*/
int
-texture_string_width (texture_font_data *data, const char *c,
- int *height_ret)
+texture_string_width (texture_font_data *data, const char *c, int *height_ret)
{
+ XFontStruct *f = data->font;
int x = 0;
int max_w = 0;
- XFontStruct *f = data->font;
- int h = f->ascent + f->descent;
+ int lh = f->ascent + f->descent;
+ int h = lh;
while (*c)
{
int cc = *((unsigned char *) c);
{
if (x > max_w) max_w = x;
x = 0;
- h += f->ascent + f->descent;
+ h += lh;
}
else
- x += (f->per_char && cc >= f->min_char_or_byte2
+ x += (f->per_char
? f->per_char[cc-f->min_char_or_byte2].width
: f->min_bounds.rbearing);
c++;
}
if (x > max_w) max_w = x;
if (height_ret) *height_ret = h;
-
return max_w;
}
-/* Draws the string in the scene at the current point.
- Newlines, tab stops and subscripts are honored.
+/* Draws the string in the scene at the origin.
+ Newlines and tab stops are honored.
+ Any numbers inside [] will be rendered as a subscript.
+ Assumes the font has been loaded as with load_texture_font().
*/
void
print_texture_string (texture_font_data *data, const char *string)
free_texture_font (texture_font_data *data)
{
int i;
- if (data->font)
- XFreeFont (data->dpy, data->font);
+
for (i = 0; i < data->ntextures; i++)
if (data->texid[i])
glDeleteTextures (1, &data->texid[i]);
+
+ if (data->font)
+ XFreeFont (data->dpy, data->font);
+
free (data);
}
projects / xscreensaver / blobdiff