LUT: initialize LUTs from 4bpp with full alpha

Use alpha=255 in seeding of premultiplied - this might not be enough
we might also have to disassociate and reassociate alpha during conversion.

diff --git a/babl/babl-fish-path.c b/babl/babl-fish-path.c
index 90135c3c28ca0370935ab72c024ed1a8db356ffb..9c1e48a9c97ae765b3c7e5ef823504ebd70dbf27 100644 (file)
--- a/babl/babl-fish-path.c
+++ b/babl/babl-fish-path.c
@@ -352,7 +352,7 @@ static inline int babl_fish_lut_process_maybe (const Babl *babl,
        {
          lut = malloc (256 * 256 * 256 * 4);
          for (int o = 0; o < 256 * 256 * 256; o++)
-           lut[o] = o;
+           lut[o] = o | 0xff000000;
          process_conversion_path (babl->fish_path.conversion_list,
                                   lut, 4,
                                   lut, 4,
@@ -365,7 +365,7 @@ static inline int babl_fish_lut_process_maybe (const Babl *babl,
          uint32_t *temp_lut = malloc (256 * 256 * 256 * 4);
          lut = malloc (256 * 256 * 256 * 16);
          for (int o = 0; o < 256 * 256 * 256; o++)
-           temp_lut[o] = o;
+           temp_lut[o] = o | 0xff000000;
          process_conversion_path (babl->fish_path.conversion_list,
                                   temp_lut, 4,
                                   lut, 16,
@@ -377,7 +377,7 @@ static inline int babl_fish_lut_process_maybe (const Babl *babl,
          uint32_t *temp_lut = malloc (256 * 256 * 256 * 4);
          lut = malloc (256 * 256 * 256 * 8);
          for (int o = 0; o < 256 * 256 * 256; o++)
-           temp_lut[o] = o;
+           temp_lut[o] = o | 0xff000000;
          process_conversion_path (babl->fish_path.conversion_list,
                                   temp_lut, 4,
                                   lut, 8,
@@ -971,7 +971,6 @@ _babl_fish_prepare_bpp (Babl *babl)
 
   int dest_not_associated = ((babl->conversion.destination->format.model->flags &
           BABL_MODEL_FLAG_ASSOCIATED)==0);
-
   if (
       (babl->conversion.source->format.type[0]->bits < 32)