Mesa (master): mesa: Add X1B5G5R5 along with A1B5G5R5.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 30782962263d21e984826aef616e25f4ec82de2d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=30782962263d21e984826aef616e25f4ec82de2d

Author: Eric Anholt <eric at anholt.net>
Date:   Mon May  1 11:21:27 2017 -0700

mesa: Add X1B5G5R5 along with A1B5G5R5.

For supporting RGB5 in hardware with A in the low bit (vc4), we need this
format as well.

v2: Add proper _mesa_format_matches_format_and_type() support (from
    Nicolai).

Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com> (v1)

---

 src/mesa/main/formats.c      | 5 +++++
 src/mesa/main/formats.csv    | 1 +
 src/mesa/main/formats.h      | 1 +
 src/mesa/main/texformat.c    | 1 +
 src/mesa/swrast/s_texfetch.c | 1 +
 5 files changed, 9 insertions(+)

diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index ecdfd56103..3445000357 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -875,6 +875,7 @@ _mesa_uncompressed_format_to_type_and_comps(mesa_format format,
 
    case MESA_FORMAT_A1B5G5R5_UNORM:
    case MESA_FORMAT_A1B5G5R5_UINT:
+   case MESA_FORMAT_X1B5G5R5_UNORM:
       *datatype = GL_UNSIGNED_SHORT_5_5_5_1;
       *comps = 4;
       return;
@@ -1526,6 +1527,10 @@ _mesa_format_matches_format_and_type(mesa_format mesa_format,
       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
          !swapBytes;
 
+   case MESA_FORMAT_X1B5G5R5_UNORM:
+      return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
+         !swapBytes;
+
    case MESA_FORMAT_B5G5R5A1_UNORM:
       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
          !swapBytes;
diff --git a/src/mesa/main/formats.csv b/src/mesa/main/formats.csv
index 285921ed44..ce53f8f056 100644
--- a/src/mesa/main/formats.csv
+++ b/src/mesa/main/formats.csv
@@ -68,6 +68,7 @@ MESA_FORMAT_B4G4R4A4_UNORM                , packed, 1, 1, 1, un4 , un4 , un4 , u
 MESA_FORMAT_B4G4R4X4_UNORM                , packed, 1, 1, 1, un4 , un4 , un4 , x4  , zyx1, rgb
 MESA_FORMAT_A4R4G4B4_UNORM                , packed, 1, 1, 1, un4 , un4 , un4 , un4 , yzwx, rgb
 MESA_FORMAT_A1B5G5R5_UNORM                , packed, 1, 1, 1, un1 , un5 , un5 , un5 , wzyx, rgb
+MESA_FORMAT_X1B5G5R5_UNORM                , packed, 1, 1, 1, x1  , un5 , un5 , un5 , wzy1, rgb
 MESA_FORMAT_B5G5R5A1_UNORM                , packed, 1, 1, 1, un5 , un5 , un5 , un1 , zyxw, rgb
 MESA_FORMAT_B5G5R5X1_UNORM                , packed, 1, 1, 1, un5 , un5 , un5 , x1  , zyx1, rgb
 MESA_FORMAT_A1R5G5B5_UNORM                , packed, 1, 1, 1, un1 , un5 , un5 , un5 , yzwx, rgb
diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h
index fbcbe36b71..b81810fc89 100644
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -350,6 +350,7 @@ typedef enum
    MESA_FORMAT_B4G4R4X4_UNORM,                       /* xxxx RRRR GGGG BBBB */
    MESA_FORMAT_A4R4G4B4_UNORM,                       /* BBBB GGGG RRRR AAAA */
    MESA_FORMAT_A1B5G5R5_UNORM,                       /* RRRR RGGG GGBB BBBA */
+   MESA_FORMAT_X1B5G5R5_UNORM,                       /* BBBB BGGG GGRR RRRX */
    MESA_FORMAT_B5G5R5A1_UNORM,                       /* ARRR RRGG GGGB BBBB */
    MESA_FORMAT_B5G5R5X1_UNORM,                       /* xRRR RRGG GGGB BBBB */
    MESA_FORMAT_A1R5G5B5_UNORM,                       /* BBBB BGGG GGRR RRRA */
diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
index 13e77b77ec..822f80f89e 100644
--- a/src/mesa/main/texformat.c
+++ b/src/mesa/main/texformat.c
@@ -88,6 +88,7 @@ _mesa_choose_tex_format(struct gl_context *ctx, GLenum target,
       break;
    case GL_RGB5_A1:
       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G5R5A1_UNORM);
+      RETURN_IF_SUPPORTED(MESA_FORMAT_A1B5G5R5_UNORM);
       break;
    case GL_RGBA2:
       RETURN_IF_SUPPORTED(MESA_FORMAT_A4R4G4B4_UNORM); /* just to test another format*/
diff --git a/src/mesa/swrast/s_texfetch.c b/src/mesa/swrast/s_texfetch.c
index 4353ea0e47..e2c3c085b5 100644
--- a/src/mesa/swrast/s_texfetch.c
+++ b/src/mesa/swrast/s_texfetch.c
@@ -159,6 +159,7 @@ texfetch_funcs[] =
    FETCH_NULL(B4G4R4X4_UNORM),
    FETCH_FUNCS(A4R4G4B4_UNORM),
    FETCH_FUNCS(A1B5G5R5_UNORM),
+   FETCH_NULL(X1B5G5R5_UNORM),
    FETCH_FUNCS(B5G5R5A1_UNORM),
    FETCH_NULL(B5G5R5X1_UNORM),
    FETCH_FUNCS(A1R5G5B5_UNORM),