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[cairo] Handle malloc failure

This commit is contained in:
Behdad Esfahbod 2023-01-26 12:55:25 -07:00
parent 29a36010a1
commit e484d6b990
1 changed files with 18 additions and 4 deletions
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22
src/hb-cairo-utils.cc
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@ -274,7 +274,7 @@ _hb_cairo_normalize_color_line (hb_color_stop_t *stops,
*omax = max; *omax = max;
} }
static void static bool
_hb_cairo_get_color_stops (hb_cairo_context_t *c, _hb_cairo_get_color_stops (hb_cairo_context_t *c,
hb_color_line_t *color_line, hb_color_line_t *color_line,
unsigned *count, unsigned *count,
@ -282,7 +282,11 @@ _hb_cairo_get_color_stops (hb_cairo_context_t *c,
{ {
unsigned len = hb_color_line_get_color_stops (color_line, 0, nullptr, nullptr); unsigned len = hb_color_line_get_color_stops (color_line, 0, nullptr, nullptr);
if (len > *count) if (len > *count)
{
*stops = (hb_color_stop_t *) hb_malloc (len * sizeof (hb_color_stop_t)); *stops = (hb_color_stop_t *) hb_malloc (len * sizeof (hb_color_stop_t));
if (unlikely (!stops))
return false;
}
hb_color_line_get_color_stops (color_line, 0, &len, *stops); hb_color_line_get_color_stops (color_line, 0, &len, *stops);
for (unsigned i = 0; i < len; i++) for (unsigned i = 0; i < len; i++)
if ((*stops)[i].is_foreground) if ((*stops)[i].is_foreground)
@ -299,6 +303,7 @@ _hb_cairo_get_color_stops (hb_cairo_context_t *c,
} }
*count = len; *count = len;
return true;
} }
void void
@ -318,7 +323,8 @@ _hb_cairo_paint_linear_gradient (hb_cairo_context_t *c,
float min, max; float min, max;
cairo_pattern_t *pattern; cairo_pattern_t *pattern;
_hb_cairo_get_color_stops (c, color_line, &len, &stops); if (unlikely (!_hb_cairo_get_color_stops (c, color_line, &len, &stops)))
return;
_hb_cairo_normalize_color_line (stops, len, &min, &max); _hb_cairo_normalize_color_line (stops, len, &min, &max);
_hb_cairo_reduce_anchors (x0, y0, x1, y1, x2, y2, &xx0, &yy0, &xx1, &yy1); _hb_cairo_reduce_anchors (x0, y0, x1, y1, x2, y2, &xx0, &yy0, &xx1, &yy1);
@ -365,7 +371,8 @@ _hb_cairo_paint_radial_gradient (hb_cairo_context_t *c,
float rr0, rr1; float rr0, rr1;
cairo_pattern_t *pattern; cairo_pattern_t *pattern;
_hb_cairo_get_color_stops (c, color_line, &len, &stops); if (unlikely (!_hb_cairo_get_color_stops (c, color_line, &len, &stops)))
return;
_hb_cairo_normalize_color_line (stops, len, &min, &max); _hb_cairo_normalize_color_line (stops, len, &min, &max);
xx0 = x0 + min * (x1 - x0); xx0 = x0 + min * (x1 - x0);
@ -626,6 +633,12 @@ _hb_cairo_add_sweep_gradient_patches (hb_color_stop_t *stops,
{ {
angles = (float *) hb_malloc (sizeof (float) * n_stops); angles = (float *) hb_malloc (sizeof (float) * n_stops);
colors = (hb_cairo_color_t *) hb_malloc (sizeof (hb_cairo_color_t) * n_stops); colors = (hb_cairo_color_t *) hb_malloc (sizeof (hb_cairo_color_t) * n_stops);
if (unlikely (!angles || !colors))
{
hb_free (angles);
hb_free (colors);
return;
}
} }
for (unsigned i = 0; i < n_stops; i++) for (unsigned i = 0; i < n_stops; i++)
@ -828,7 +841,8 @@ _hb_cairo_paint_sweep_gradient (hb_cairo_context_t *c,
float max_x, max_y, radius; float max_x, max_y, radius;
cairo_pattern_t *pattern; cairo_pattern_t *pattern;
_hb_cairo_get_color_stops (c, color_line, &len, &stops); if (unlikely (!_hb_cairo_get_color_stops (c, color_line, &len, &stops)))
return;
hb_qsort (stops, len, sizeof (hb_color_stop_t), _hb_cairo_cmp_color_stop); hb_qsort (stops, len, sizeof (hb_color_stop_t), _hb_cairo_cmp_color_stop);