Fix wrong alpha for scene linear byte images during texture painting

Make the update logic consistent with the case where the initial texture is
created. Also fixes a wrong assert.

Thanks Clément for spotting this.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/imbuf/intern/colormanagement.c b/source/blender/imbuf/intern/colormanagement.c
index b95ec1cd92b..b62bdd5521d 100644
--- a/source/blender/imbuf/intern/colormanagement.c
+++ b/source/blender/imbuf/intern/colormanagement.c
@@ -2213,10 +2213,11 @@ void IMB_colormanagement_imbuf_to_byte_texture(unsigned char *out_buffer,
                                                const struct ImBuf *ibuf,
                                                const bool store_premultiplied)
 {
-  /* Byte buffer storage, only for sRGB and data texture since other
+  /* Byte buffer storage, only for sRGB, scene linear and data texture since other
    * color space conversions can't be done on the GPU. */
   BLI_assert(ibuf->rect && ibuf->rect_float == NULL);
   BLI_assert(IMB_colormanagement_space_is_srgb(ibuf->rect_colorspace) ||
+             IMB_colormanagement_space_is_scene_linear(ibuf->rect_colorspace) ||
              IMB_colormanagement_space_is_data(ibuf->rect_colorspace));
 
   const unsigned char *in_buffer = (unsigned char *)ibuf->rect;