gallium: Remove s3tc enablement leftovers

This part has been removed from Mesa since commit 3a8a5e77e8f992aaa3539e060885138c2fcddad1
as the patent expired in 2017.

Signed-off-by: Corentin Noël <corentin.noel@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>

src/gallium/auxiliary/util/u_format.c

@@ -40,28 +40,6 @@
 
 #include "pipe/p_defines.h"
 
-boolean util_format_s3tc_enabled = FALSE;
-
-boolean
-util_format_is_float(enum pipe_format format)
-{
-   const struct util_format_description *desc = util_format_description(format);
-   int i;
-
-   assert(desc);
-   if (!desc) {
-      return FALSE;
-   }
-
-   i = util_format_get_first_non_void_channel(format);
-   if (i == -1) {
-      return FALSE;
-   }
-
-   return desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT ? TRUE : FALSE;
-}
-
-
 /** Test if the format contains RGB, but not alpha */
 boolean
 util_format_has_alpha(enum pipe_format format)
@@ -205,38 +183,6 @@ util_format_is_intensity(enum pipe_format format)
    return FALSE;
 }
 
-boolean
-util_format_is_subsampled_422(enum pipe_format format)
-{
-   const struct util_format_description *desc =
-      util_format_description(format);
-
-   return desc->layout == UTIL_FORMAT_LAYOUT_SUBSAMPLED &&
-      desc->block.width == 2 &&
-      desc->block.height == 1 &&
-      desc->block.bits == 32;
-}
-
-boolean
-util_format_is_supported(enum pipe_format format, unsigned bind)
-{
-   if (util_format_is_s3tc(format) && !util_format_s3tc_enabled) {
-      return FALSE;
-   }
-
-#ifndef TEXTURE_FLOAT_ENABLED
-   if ((bind & PIPE_BIND_RENDER_TARGET) &&
-       format != PIPE_FORMAT_R9G9B9E5_FLOAT &&
-       format != PIPE_FORMAT_R11G11B10_FLOAT &&
-       util_format_is_float(format)) {
-      return FALSE;
-   }
-#endif
-
-   return TRUE;
-}
-
-
 /**
  * Calculates the MRD for the depth format. MRD is used in depth bias
  * for UNORM and unbound depth buffers. When the depth buffer is floating

src/gallium/auxiliary/util/u_format.h

@@ -318,19 +318,6 @@ util_format_is_compressed(enum pipe_format format)
    }
 }
 
-static inline boolean 
-util_format_is_s3tc(enum pipe_format format)
-{
-   const struct util_format_description *desc = util_format_description(format);
-
-   assert(desc);
-   if (!desc) {
-      return FALSE;
-   }
-
-   return desc->layout == UTIL_FORMAT_LAYOUT_S3TC ? TRUE : FALSE;
-}
-
 static inline boolean 
 util_format_is_srgb(enum pipe_format format)
 {
@@ -435,55 +422,6 @@ util_format_get_mask(enum pipe_format format)
    }
 }
 
-/**
- * Give the RGBA colormask of the channels that can be represented in this
- * format.
- *
- * That is, the channels whose values are preserved.
- */
-static inline unsigned
-util_format_colormask(const struct util_format_description *desc)
-{
-   unsigned colormask;
-   unsigned chan;
-
-   switch (desc->colorspace) {
-   case UTIL_FORMAT_COLORSPACE_RGB:
-   case UTIL_FORMAT_COLORSPACE_SRGB:
-   case UTIL_FORMAT_COLORSPACE_YUV:
-      colormask = 0;
-      for (chan = 0; chan < 4; ++chan) {
-         if (desc->swizzle[chan] < 4) {
-            colormask |= (1 << chan);
-         }
-      }
-      return colormask;
-   case UTIL_FORMAT_COLORSPACE_ZS:
-      return 0;
-   default:
-      assert(0);
-      return 0;
-   }
-}
-
-
-/**
- * Checks if color mask covers every channel for the specified format
- *
- * @param desc       a format description to check colormask with
- * @param colormask  a bit mask for channels, matches format of PIPE_MASK_RGBA
- */
-static inline boolean
-util_format_colormask_full(const struct util_format_description *desc, unsigned colormask)
-{
-   return (~colormask & util_format_colormask(desc)) == 0;
-}
-
-
-boolean
-util_format_is_float(enum pipe_format format);
-
-
 boolean
 util_format_has_alpha(enum pipe_format format);
 
@@ -501,9 +439,6 @@ util_format_is_luminance_alpha(enum pipe_format format);
 boolean
 util_format_is_intensity(enum pipe_format format);
 
-boolean
-util_format_is_subsampled_422(enum pipe_format format);
-
 boolean
 util_format_is_pure_integer(enum pipe_format format);
 
@@ -525,13 +460,6 @@ boolean
 util_is_format_compatible(const struct util_format_description *src_desc,
                           const struct util_format_description *dst_desc);
 
-/**
- * Whether the format is supported by Gallium for the given bindings.
- * This covers S3TC textures and floating-point render targets.
- */
-boolean
-util_format_is_supported(enum pipe_format format, unsigned bind);
-
 /**
  * Whether this format is a rgab8 variant.
  *

src/gallium/auxiliary/util/u_format_s3tc.h

@@ -40,11 +40,4 @@ enum util_format_dxtn {
   UTIL_FORMAT_DXT5_RGBA = 0x83F3
 };
 
-
-extern boolean util_format_s3tc_enabled;
-
-
-void
-util_format_s3tc_init(void);
-
 #endif