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authorBehdad Esfahbod <behdad@gnome.org>2006-02-02 11:30:35 +0000
committerBehdad Esfahbod <behdad@src.gnome.org>2006-02-02 11:30:35 +0000
commitb56f82723b5a72ca43769526377a90f5916980fc (patch)
tree98f0cb9e4c3af851517f0091111024f951006e2e /pango
parent4380d23fd1695c629b3713e456214de25f187850 (diff)
downloadpango-b56f82723b5a72ca43769526377a90f5916980fc.tar.gz
Guard Xft backend agains crashes too.
2006-02-02 Behdad Esfahbod <behdad@gnome.org> * pango/pangoxft-font.c, pango/pangoxft-render.c: Guard Xft backend agains crashes too.
Diffstat (limited to 'pango')
-rw-r--r--pango/pangoxft-font.c17
-rw-r--r--pango/pangoxft-private.h8
-rw-r--r--pango/pangoxft-render.c64
3 files changed, 67 insertions, 22 deletions
diff --git a/pango/pangoxft-font.c b/pango/pangoxft-font.c
index c7004c0c..f67d7b5b 100644
--- a/pango/pangoxft-font.c
+++ b/pango/pangoxft-font.c
@@ -27,6 +27,8 @@
#include "pangoxft-private.h"
#include "pangofc-private.h"
+PangoXftWarningHistory _pango_xft_warning_history = { FALSE };
+
#define PANGO_XFT_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_XFT_FONT, PangoXftFontClass))
#define PANGO_XFT_IS_FONT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_XFT_FONT))
#define PANGO_XFT_FONT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_XFT_FONT, PangoXftFontClass))
@@ -121,7 +123,8 @@ _pango_xft_font_get_mini_font (PangoXftFont *xfont)
{
PangoFcFont *fcfont = (PangoFcFont *)xfont;
- g_assert (fcfont->fontmap);
+ if (!fcfont || !fcfont->fontmap)
+ return NULL;
if (!xfont->mini_font)
{
@@ -150,6 +153,8 @@ _pango_xft_font_get_mini_font (PangoXftFont *xfont)
pango_font_description_set_size (desc, new_size);
xfont->mini_font = pango_font_map_load_font (fcfont->fontmap, context, desc);
+ if (!xfont->mini_font)
+ return NULL;
pango_font_description_free (desc);
g_object_unref (context);
@@ -474,7 +479,15 @@ pango_xft_font_real_shutdown (PangoFcFont *fcfont)
XftFont *
pango_xft_font_get_font (PangoFont *font)
{
- g_return_val_if_fail (PANGO_XFT_IS_FONT (font), NULL);
+ if (G_UNLIKELY (!PANGO_XFT_IS_FONT (font)))
+ {
+ if (!_pango_xft_warning_history.get_font)
+ {
+ _pango_xft_warning_history.get_font = TRUE;
+ g_critical ("pango_xft_font_get_font called with font == NULL, expect ugly output");
+ }
+ return NULL;
+ }
return xft_font_get_font (font);
}
diff --git a/pango/pangoxft-private.h b/pango/pangoxft-private.h
index 1a00860a..82e57da7 100644
--- a/pango/pangoxft-private.h
+++ b/pango/pangoxft-private.h
@@ -55,6 +55,14 @@ PangoRenderer *_pango_xft_font_map_get_renderer (PangoXftFontMap *xftfontmap);
PangoFont *_pango_xft_font_get_mini_font (PangoXftFont *xfont);
+typedef struct _PangoXftWarningHistory PangoXftWarningHistory;
+
+struct _PangoXftWarningHistory {
+ guint get_font : 1;
+};
+
+extern PangoXftWarningHistory _pango_xft_warning_history;
+
G_END_DECLS
#endif /* __PANGOXFT_PRIVATE_H__ */
diff --git a/pango/pangoxft-render.c b/pango/pangoxft-render.c
index 3e089bdd..d95bce65 100644
--- a/pango/pangoxft-render.c
+++ b/pango/pangoxft-render.c
@@ -22,6 +22,7 @@
#include <config.h>
#include <math.h>
+#include "pango-engine-private.h"
#include "pangoxft-render.h"
#include "pangoxft-private.h"
@@ -297,20 +298,20 @@ box_in_bounds (PangoRenderer *renderer,
static void
draw_box (PangoRenderer *renderer,
- PangoXftFont *xfont,
+ gint line_width,
gint x,
gint y,
gint width,
gint height)
{
pango_renderer_draw_rectangle (renderer, PANGO_RENDER_PART_FOREGROUND,
- x, y, width, xfont->mini_pad);
+ x, y, width, line_width);
pango_renderer_draw_rectangle (renderer, PANGO_RENDER_PART_FOREGROUND,
- x, y + xfont->mini_pad, xfont->mini_pad, height - xfont->mini_pad * 2);
+ x, y + line_width, line_width, height - line_width * 2);
pango_renderer_draw_rectangle (renderer, PANGO_RENDER_PART_FOREGROUND,
- x + width - xfont->mini_pad, y + xfont->mini_pad, xfont->mini_pad, height - xfont->mini_pad * 2);
+ x + width - line_width, y + line_width, line_width, height - line_width * 2);
pango_renderer_draw_rectangle (renderer, PANGO_RENDER_PART_FOREGROUND,
- x, y + height - xfont->mini_pad, width, xfont->mini_pad);
+ x, y + height - line_width, width, line_width);
}
static void
@@ -326,7 +327,31 @@ pango_xft_renderer_draw_glyphs (PangoRenderer *renderer,
int i;
int x_off = 0;
- if (!fcfont->fontmap) /* Display closed */
+ if (!fcfont)
+ {
+ for (i=0; i<glyphs->num_glyphs; i++)
+ {
+ PangoGlyph glyph = glyphs->glyphs[i].glyph;
+ int glyph_x = x + x_off + glyphs->glyphs[i].geometry.x_offset;
+ int glyph_y = y + glyphs->glyphs[i].geometry.y_offset;
+
+ if (glyph != PANGO_GLYPH_NULL && glyph & PANGO_GLYPH_UNKNOWN_FLAG)
+ {
+ int x = glyph_x + PANGO_SCALE;
+ int y = glyph_y + PANGO_SCALE;
+ int width = PANGO_SCALE * (PANGO_UNKNOWN_GLYPH_WIDTH - 2);
+ int height = PANGO_SCALE * (PANGO_UNKNOWN_GLYPH_HEIGHT - 2);
+
+ if (box_in_bounds (renderer, x, y, width, height))
+ draw_box (renderer, PANGO_SCALE, x, y, width, height);
+ }
+
+ x_off += glyphs->glyphs[i].geometry.width;
+ }
+ return;
+ }
+
+ if (!fcfont->fontmap) /* Display closed */
return;
for (i=0; i<glyphs->num_glyphs; i++)
@@ -359,23 +384,23 @@ pango_xft_renderer_draw_glyphs (PangoRenderer *renderer,
xs[2] = xs[1] + xfont->mini_width + xfont->mini_pad;
xs[3] = xs[2] + xfont->mini_width + xfont->mini_pad;
- if (glyph > 0xffff)
- {
- cols = 3;
- g_snprintf (buf, sizeof(buf), "%06X", glyph);
- }
- else
- {
- cols = 2;
- g_snprintf (buf, sizeof(buf), "%04X", glyph);
- }
+ if (glyph > 0xffff)
+ {
+ cols = 3;
+ g_snprintf (buf, sizeof(buf), "%06X", glyph);
+ }
+ else
+ {
+ cols = 2;
+ g_snprintf (buf, sizeof(buf), "%04X", glyph);
+ }
if (box_in_bounds (renderer,
xs[0], ys[0],
xfont->mini_width * cols + xfont->mini_pad * (2 * cols + 1),
xfont->mini_height * 2 + xfont->mini_pad * 5))
{
- draw_box (renderer, xfont,
+ draw_box (renderer, xfont->mini_pad,
xs[0], ys[0],
xfont->mini_width * cols + xfont->mini_pad * (2 * cols + 1),
xfont->mini_height * 2 + xfont->mini_pad * 5);
@@ -391,10 +416,9 @@ pango_xft_renderer_draw_glyphs (PangoRenderer *renderer,
}
}
}
- else if (glyph)
+ else
{
- draw_glyph (renderer, font,
- glyph, glyph_x, glyph_y);
+ draw_glyph (renderer, font, glyph, glyph_x, glyph_y);
}
}