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app: in gimp_composite_blend(), avoid overwriting input in some cases (again)

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Revert commit f6436eee96, which was wrong,
and redo it the right way.
This commit is contained in:
Ell
2017-01-19 16:16:44 -05:00
parent 894d4c0c01
commit 5da89f0daf
1 changed files with 23 additions and 13 deletions
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36
app/operations/layer-modes/gimpblendcomposite.h
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@ -218,6 +218,9 @@ gimp_composite_blend (gfloat *in,
gfloat *blend_layer = layer;
gfloat *blend_out = out;
gfloat *composite_in;
gfloat *composite_layer;
const Babl *fish_to_blend = NULL;
const Babl *fish_to_composite = NULL;
const Babl *fish_from_composite = NULL;
@ -290,39 +293,46 @@ gimp_composite_blend (gfloat *in,
read it for the compositing stage */
blend_out = g_alloca (sizeof (gfloat) * 4 * samples);
if (fish_to_blend || fish_to_composite)
if (fish_to_blend)
{
blend_in = g_alloca (sizeof (gfloat) * 4 * samples);
blend_layer = g_alloca (sizeof (gfloat) * 4 * samples);
}
if (fish_to_blend)
{
babl_process (fish_to_blend, in, blend_in, samples);
babl_process (fish_to_blend, layer, blend_layer, samples);
}
blend_func (blend_in, blend_layer, blend_out, samples);
composite_in = blend_in;
composite_layer = blend_layer;
if (fish_to_composite)
{
if (composite_trc == GIMP_LAYER_COLOR_SPACE_RGB_LINEAR)
{
blend_in = in;
blend_layer = layer;
composite_in = in;
composite_layer = layer;
}
else
{
if (composite_mode == GIMP_LAYER_COMPOSITE_SRC_OVER ||
composite_mode == GIMP_LAYER_COMPOSITE_SRC_ATOP)
{
babl_process (fish_to_composite, blend_in, blend_in, samples);
if (composite_in == in)
composite_in = g_alloca (sizeof (gfloat) * 4 * samples);
babl_process (fish_to_composite,
blend_in, composite_in, samples);
}
if (composite_mode == GIMP_LAYER_COMPOSITE_SRC_OVER ||
composite_mode == GIMP_LAYER_COMPOSITE_DST_ATOP)
{
babl_process (fish_to_composite, blend_layer, blend_layer, samples);
if (composite_layer == layer)
composite_layer = g_alloca (sizeof (gfloat) * 4 * samples);
babl_process (fish_to_composite,
blend_layer, composite_layer, samples);
}
}
@ -333,19 +343,19 @@ gimp_composite_blend (gfloat *in,
{
case GIMP_LAYER_COMPOSITE_SRC_ATOP:
default:
compfun_src_atop (blend_in, blend_out, mask, opacity, out, samples);
compfun_src_atop (composite_in, blend_out, mask, opacity, out, samples);
break;
case GIMP_LAYER_COMPOSITE_SRC_OVER:
compfun_src_over (blend_in, blend_layer, blend_out, mask, opacity, out, samples);
compfun_src_over (composite_in, composite_layer, blend_out, mask, opacity, out, samples);
break;
case GIMP_LAYER_COMPOSITE_DST_ATOP:
compfun_dst_atop (blend_in, blend_layer, blend_out, mask, opacity, out, samples);
compfun_dst_atop (composite_in, composite_layer, blend_out, mask, opacity, out, samples);
break;
case GIMP_LAYER_COMPOSITE_SRC_IN:
compfun_src_in (blend_in, blend_out, mask, opacity, out, samples);
compfun_src_in (composite_in, blend_out, mask, opacity, out, samples);
break;
}