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avfilter/drawutils: Fix single plane with alpha 

Fixes Ticket5720

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-08-09 12:22:15 +02:00
parent 011837285f
commit 369ed11e3c
1 changed files with 2 additions and 0 deletions
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2
libavfilter/drawutils.c
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@ -450,6 +450,7 @@ void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,
alpha = 0x101 * color->rgba[3] + 0x2;
}
nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA);
nb_planes += !nb_planes;
for (plane = 0; plane < nb_planes; plane++) {
nb_comp = draw->pixelstep[plane];
p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
@ -627,6 +628,7 @@ void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
alpha = (0x101 * color->rgba[3] + 0x2) >> 8;
}
nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA);
nb_planes += !nb_planes;
for (plane = 0; plane < nb_planes; plane++) {
nb_comp = draw->pixelstep[plane];
p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);