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Issue #5208 - paint brush is broken when aspect ratio is set to negative

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Fix horizontal downscaling of brush mipmap levels with odd width.
We'd previously fail to skip the last pixel of each input row,
which isn't included in the output when the width is odd, causing
subsequent output rows to be shifted to the right.
This commit is contained in:
Ell 2020-06-12 17:20:23 +03:00
parent 6d74c57be7
commit c4a201eaf4
1 changed files with 12 additions and 5 deletions
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17
app/core/gimpbrush-mipmap.cc
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@ -292,16 +292,20 @@ struct MipmapAlgorithms
[=] (gint offset,
gint size)
{
const T *src = (const T *) gimp_temp_buf_get_data (source);
T *dest = (T *) gimp_temp_buf_get_data (destination);
const T *src0 = (const T *) gimp_temp_buf_get_data (source);
T *dest0 = (T *) gimp_temp_buf_get_data (destination);
gint src_stride = N * gimp_temp_buf_get_width (source);
gint dest_stride = N * gimp_temp_buf_get_width (destination);
gint y;
src += offset * gimp_temp_buf_get_width (source) * N;
dest += offset * gimp_temp_buf_get_width (destination) * N;
src0 += offset * src_stride;
dest0 += offset * dest_stride;
for (y = 0; y < size; y++)
{
gint x;
const T *src = src0;
T *dest = dest0;
gint x;
for (x = 0; x < width; x++)
{
@ -313,6 +317,9 @@ struct MipmapAlgorithms
src += 2 * N;
dest += N;
}
src0 += src_stride;
dest0 += dest_stride;
}
});