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[base] Adjust rendering limits.

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* src/base/ftobjs.c (ft_glyphslot_preset_bitmap): Check width and
height directly. Fixes #1390.
This commit is contained in:
Alexei Podtelezhnikov 2026-03-05 19:55:31 -05:00
parent d262bd978c
commit 6995a34628
1 changed files with 14 additions and 25 deletions
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39
src/base/ftobjs.c
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@ -385,6 +385,7 @@
FT_Pos y_shift = 0;
FT_Pos x_left, y_top;
FT_Pos width, height, pitch;
FT_Bool ret;
if ( slot->format == FT_GLYPH_FORMAT_SVG )
@ -495,6 +496,18 @@
width = pbox.xMax - pbox.xMin;
height = pbox.yMax - pbox.yMin;
/* Flag the width or height unsuitable for rendering. */
/* The limit is based on the ppem value when available. */
/* FT_Renderer modules should check the return value. */
ret = FT_BOOL( width >= 0x10000 || height >= 0x10000 ||
( slot->face &&
( width > 10 * slot->face->size->metrics.x_ppem ||
height > 10 * slot->face->size->metrics.y_ppem ) ) );
if ( ret )
FT_TRACE3(( "ft_glyphslot_preset_bitmap: [%ld %ld %ld %ld]\n",
pbox.xMin, pbox.yMin, pbox.xMax, pbox.yMax ));
switch ( pixel_mode )
{
case FT_PIXEL_MODE_MONO:
@ -524,31 +537,7 @@
bitmap->rows = (unsigned int)height;
bitmap->pitch = pitch;
/* Flag the bounding box size unsuitable for rendering. */
/* FT_Renderer modules should check the return value. */
/* The limit is based on the ppem value when available. */
{
FT_Face face = slot->face;
FT_Pos xlim = 0x8000;
FT_Pos ylim = 0x8000;
if ( face )
{
xlim = FT_MIN( xlim, 10 * face->size->metrics.x_ppem );
ylim = FT_MIN( ylim, 10 * face->size->metrics.y_ppem );
}
if ( pbox.xMin < -xlim || pbox.xMax >= xlim ||
pbox.yMin < -ylim || pbox.yMax >= ylim )
{
FT_TRACE3(( "ft_glyphslot_preset_bitmap: [%ld %ld %ld %ld]\n",
pbox.xMin, pbox.yMin, pbox.xMax, pbox.yMax ));
return 1;
}
}
return 0;
return ret;
}