From: Øyvind Kolås <pippin@gimp.org>
Date: Thu, 23 Mar 2023 09:34:46 +0000 (+0100)
Subject: LUT: initialize LUTs from 4bpp with full alpha
X-Git-Tag: archive/raspbian/1%0.1.106-3+rpi1^2~15^2^2~14
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=359a2a391f55c9201b96ed7fb3f5ffed8af3a6d9;p=babl.git

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 90135c3..9c1e48a 100644
--- 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)