gallium/format: add support for X24S8 and S8X24 formats.

these formats are needed for hw that can sample and write stencil values.

Signed-off-by: Dave Airlie <airlied@redhat.com>

6 files changed, 107 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_format.csv b/src/gallium/auxiliary/util/u_format.csv
index 016e73c4a1..5c0f8db1b2 100644
--- a/src/gallium/auxiliary/util/u_format.csv
+++ b/src/gallium/auxiliary/util/u_format.csv
@@ -109,6 +109,8 @@ PIPE_FORMAT_Z32_UNORM               , plain, 1, 1, un32,     ,     ,     , x___,
 PIPE_FORMAT_Z32_FLOAT               , plain, 1, 1, f32 ,     ,     ,     , x___, zs
 PIPE_FORMAT_Z24_UNORM_S8_USCALED    , plain, 1, 1, un24, u8  ,     ,     , xy__, zs
 PIPE_FORMAT_S8_USCALED_Z24_UNORM    , plain, 1, 1, u8 ,  un24,     ,     , yx__, zs
+PIPE_FORMAT_X24S8_USCALED           , plain, 1, 1, x24,  u8  ,     ,     , _y__, zs
+PIPE_FORMAT_S8X24_USCALED           , plain, 1, 1, u8  , x24 ,     ,     , _x__, zs
 PIPE_FORMAT_Z24X8_UNORM             , plain, 1, 1, un24, x8  ,     ,     , x___, zs
 PIPE_FORMAT_X8Z24_UNORM             , plain, 1, 1, x8  , un24,     ,     , y___, zs
 PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED , plain, 1, 1, f32,  u8  , x24 ,     , xy__, zs
diff --git a/src/gallium/auxiliary/util/u_format_zs.c b/src/gallium/auxiliary/util/u_format_zs.c
index 792d69c214..fdadcec984 100644
--- a/src/gallium/auxiliary/util/u_format_zs.c
+++ b/src/gallium/auxiliary/util/u_format_zs.c
@@ -918,3 +918,35 @@ util_format_z32_float_s8x24_uscaled_pack_s_8uscaled(uint8_t *dst_row, unsigned d
    }
 }
 
+
+void
+util_format_x24s8_uscaled_unpack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
+{
+   util_format_z24_unorm_s8_uscaled_unpack_s_8uscaled(dst_row, dst_stride,
+						      src_row, src_stride,
+						      width, height);
+}
+
+void
+util_format_x24s8_uscaled_pack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
+{
+   util_format_z24_unorm_s8_uscaled_pack_s_8uscaled(dst_row, dst_stride,
+						    src_row, src_stride,
+						    width, height);
+}
+
+void
+util_format_s8x24_uscaled_unpack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
+{
+   util_format_s8_uscaled_z24_unorm_unpack_s_8uscaled(dst_row, dst_stride,
+						      src_row, src_stride,
+						      width, height);
+}
+
+void
+util_format_s8x24_uscaled_pack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
+{
+   util_format_s8_uscaled_z24_unorm_pack_s_8uscaled(dst_row, dst_stride,
+						      src_row, src_stride,
+						      width, height);
+}
diff --git a/src/gallium/auxiliary/util/u_format_zs.h b/src/gallium/auxiliary/util/u_format_zs.h
index 650db4b95f..d412ca4c11 100644
--- a/src/gallium/auxiliary/util/u_format_zs.h
+++ b/src/gallium/auxiliary/util/u_format_zs.h
@@ -192,5 +192,16 @@ util_format_z32_float_s8x24_uscaled_unpack_s_8uscaled(uint8_t *dst_row, unsigned
 void
 util_format_z32_float_s8x24_uscaled_pack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height);
 
+void
+util_format_x24s8_uscaled_unpack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height);
+
+void
+util_format_x24s8_uscaled_pack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height);
+
+void
+util_format_s8x24_uscaled_unpack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height);
+
+void
+util_format_s8x24_uscaled_pack_s_8uscaled(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height);
 
 #endif /* U_FORMAT_ZS_H_ */
diff --git a/src/gallium/auxiliary/util/u_tile.c b/src/gallium/auxiliary/util/u_tile.c
index f7aa1403d0..3099bc6f48 100644
--- a/src/gallium/auxiliary/util/u_tile.c
+++ b/src/gallium/auxiliary/util/u_tile.c
@@ -217,6 +217,57 @@ z24s8_get_tile_rgba(const unsigned *src,
    }
 }
 
+/*** PIPE_FORMAT_S8X24_USCALED ***/
+
+/**
+ * Return S component as four uint32_t in [0..255].  Z part ignored.
+ */
+static void
+s8x24_get_tile_rgba(const unsigned *src,
+                    unsigned w, unsigned h,
+                    float *p,
+                    unsigned dst_stride)
+{
+   unsigned i, j;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+
+      for (j = 0; j < w; j++, pRow += 4) {
+         pRow[0] =
+         pRow[1] =
+         pRow[2] =
+         pRow[3] = (float)((*src++ >> 24) & 0xff);
+      }
+
+      p += dst_stride;
+   }
+}
+
+/*** PIPE_FORMAT_X24S8_USCALED ***/
+
+/**
+ * Return S component as four uint32_t in [0..255].  Z part ignored.
+ */
+static void
+x24s8_get_tile_rgba(const unsigned *src,
+                    unsigned w, unsigned h,
+                    float *p,
+                    unsigned dst_stride)
+{
+   unsigned i, j;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++, pRow += 4) {
+         pRow[0] =
+         pRow[1] =
+         pRow[2] =
+         pRow[3] = (float)(*src++ & 0xff);
+      }
+      p += dst_stride;
+   }
+}
 
 /*** PIPE_FORMAT_Z32_FLOAT ***/
 
@@ -261,10 +312,16 @@ pipe_tile_raw_to_rgba(enum pipe_format format,
    case PIPE_FORMAT_Z24X8_UNORM:
       s8z24_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
       break;
+   case PIPE_FORMAT_X24S8_USCALED:
+      s8x24_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
+      break;
    case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
    case PIPE_FORMAT_X8Z24_UNORM:
       z24s8_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
       break;
+   case PIPE_FORMAT_S8X24_USCALED:
+      x24s8_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
+      break;
    case PIPE_FORMAT_Z32_FLOAT:
       z32f_get_tile_rgba((float *) src, w, h, dst, dst_stride);
       break;
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index c767680c62..d99ed7c6d6 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -1499,6 +1499,8 @@ well.
 | Z                  | XXX TBD      | (z, z, z, 1)       | (0, z, 0, 1) |
 |                    |              | [#depth-tex-mode]_ |              |
 +--------------------+--------------+--------------------+--------------+
+| S                  | (s, s, s, s) | unknown            | unknown      |
++--------------------+--------------+--------------------+--------------+
 
 .. [#envmap-bumpmap] http://www.opengl.org/registry/specs/ATI/envmap_bumpmap.txt
 .. [#depth-tex-mode] the default is (z, z, z, 1) but may also be (0, 0, 0, z)
diff --git a/src/gallium/include/pipe/p_format.h b/src/gallium/include/pipe/p_format.h
index 06412f4894..9978e5236f 100644
--- a/src/gallium/include/pipe/p_format.h
+++ b/src/gallium/include/pipe/p_format.h
@@ -186,6 +186,9 @@ enum pipe_format {
    PIPE_FORMAT_R8G8B8X8_UNORM          = 134,
    PIPE_FORMAT_B4G4R4X4_UNORM          = 135,
 
+   /* some stencil samplers formats */
+   PIPE_FORMAT_X24S8_USCALED           = 136,
+   PIPE_FORMAT_S8X24_USCALED           = 137,
    PIPE_FORMAT_COUNT
 };