mesa: Add MESA_FORMAT_ABGR2101010.

Including pack/unpack and texstore code.  This texture format is a
requirement for ARB_shader_image_load_store.

Acked-by: Chris Forbes <[email protected]>
Reviewed-by: Paul Berry <[email protected]>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/mesa/main/format_unpack.c b/src/mesa/main/format_unpack.c
index 0a8b8b18383..fa559300d03 100644
--- a/src/mesa/main/format_unpack.c
+++ b/src/mesa/main/format_unpack.c
@@ -2268,6 +2268,18 @@ unpack_XBGR32323232_SINT(const void *src, GLfloat dst[][4], GLuint n)
    }
 }
 
+static void
+unpack_ABGR2101010(const void *src, GLfloat dst[][4], GLuint n)
+{
+   const GLuint *s = ((const GLuint *) src);
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      dst[i][RCOMP] = ((s[i] >> 0) & 0x3ff) * (1.0F / 1023.0F);
+      dst[i][GCOMP] = ((s[i] >> 10) & 0x3ff) * (1.0F / 1023.0F);
+      dst[i][BCOMP] = ((s[i] >> 20) & 0x3ff) * (1.0F / 1023.0F);
+      dst[i][ACOMP] = ((s[i] >> 30) &  0x03) * (1.0F / 3.0F);
+   }
+}
 
 /**
  * Return the unpacker function for the given format.
@@ -2481,6 +2493,8 @@ get_unpack_rgba_function(gl_format format)
       table[MESA_FORMAT_XBGR32323232_UINT] = unpack_XBGR32323232_UINT;
       table[MESA_FORMAT_XBGR32323232_SINT] = unpack_XBGR32323232_SINT;
 
+      table[MESA_FORMAT_ABGR2101010] = unpack_ABGR2101010;
+
       initialized = GL_TRUE;
    }
 
@@ -3582,6 +3596,20 @@ unpack_int_rgba_XBGR32323232_UINT(const GLuint *src, GLuint dst[][4], GLuint n)
    }
 }
 
+static void
+unpack_int_rgba_ABGR2101010(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      GLuint tmp = src[i];
+      dst[i][0] = (tmp >> 0) & 0x3ff;
+      dst[i][1] = (tmp >> 10) & 0x3ff;
+      dst[i][2] = (tmp >> 20) & 0x3ff;
+      dst[i][3] = (tmp >> 30) & 0x3;
+   }
+}
+
 void
 _mesa_unpack_uint_rgba_row(gl_format format, GLuint n,
                            const void *src, GLuint dst[][4])
@@ -3782,6 +3810,10 @@ _mesa_unpack_uint_rgba_row(gl_format format, GLuint n,
       unpack_int_rgba_XBGR32323232_UINT(src, dst, n);
       break;
 
+   case MESA_FORMAT_ABGR2101010:
+      unpack_int_rgba_ABGR2101010(src, dst, n);
+      break;
+
    default:
       _mesa_problem(NULL, "%s: bad format %s", __FUNCTION__,
                     _mesa_get_format_name(format));