i965/blorp: Remove a pile of blorp_blit restrictions

Previously, blorp could only blit into something that was renderable.
Thanks to recent additions to blorp, it can now blit into basically
anything so long as it isn't compressed.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

diff --git a/src/mesa/drivers/dri/i965/brw_blorp.c b/src/mesa/drivers/dri/i965/brw_blorp.c
index fa64e80..f538cd0 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_blorp.c
+++ b/src/mesa/drivers/dri/i965/brw_blorp.c
@@ -193,6 +193,26 @@ blorp_surf_for_miptree(struct brw_context *brw,
    *level -= mt->first_level;
 }
 
+static bool
+brw_blorp_supports_dst_format(struct brw_context *brw, mesa_format format)
+{
+   /* If it's renderable, it's definitely supported. */
+   if (brw->mesa_format_supports_render[format])
+      return true;
+
+   /* BLORP can't compress anything */
+   if (_mesa_is_format_compressed(format))
+      return false;
+
+   /* No exotic formats such as GL_LUMINANCE_ALPHA */
+   if (_mesa_get_format_bits(format, GL_RED_BITS) == 0 &&
+       _mesa_get_format_bits(format, GL_DEPTH_BITS) == 0 &&
+       _mesa_get_format_bits(format, GL_STENCIL_BITS) == 0)
+      return false;
+
+   return true;
+}
+
 static enum isl_format
 brw_blorp_to_isl_format(struct brw_context *brw, mesa_format format,
                         bool is_render_target)
@@ -210,15 +230,20 @@ brw_blorp_to_isl_format(struct brw_context *brw, mesa_format format,
       return ISL_FORMAT_R32_FLOAT;
    case MESA_FORMAT_Z_UNORM16:
       return ISL_FORMAT_R16_UNORM;
-   default: {
+   default:
       if (is_render_target) {
-         assert(brw->mesa_format_supports_render[format]);
-         return brw->mesa_to_isl_render_format[format];
+         assert(brw_blorp_supports_dst_format(brw, format));
+         if (brw->mesa_format_supports_render[format]) {
+            return brw->mesa_to_isl_render_format[format];
+         } else {
+            return brw_isl_format_for_mesa_format(format);
+         }
       } else {
+         /* Some destinations (is_render_target == true) are supported by
+          * blorp even though we technically can't render to them.
+          */
          return brw_isl_format_for_mesa_format(format);
       }
-      break;
-   }
    }
 }
 
@@ -562,14 +587,6 @@ try_blorp_blit(struct brw_context *brw,
       src_mt = find_miptree(buffer_bit, src_irb);
       dst_mt = find_miptree(buffer_bit, dst_irb);
 
-      /* We can't handle format conversions between Z24 and other formats
-       * since we have to lie about the surface format. See the comments in
-       * brw_blorp_surface_info::set().
-       */
-      if ((src_mt->format == MESA_FORMAT_Z24_UNORM_X8_UINT) !=
-          (dst_mt->format == MESA_FORMAT_Z24_UNORM_X8_UINT))
-         return false;
-
       /* We also can't handle any combined depth-stencil formats because we
        * have to reinterpret as a color format.
        */
@@ -638,28 +655,14 @@ brw_blorp_copytexsubimage(struct brw_context *brw,
    struct intel_mipmap_tree *src_mt = src_irb->mt;
    struct intel_mipmap_tree *dst_mt = intel_image->mt;
 
-   if (_mesa_get_format_base_format(src_rb->Format) !=
-       _mesa_get_format_base_format(dst_image->TexFormat)) {
-      return false;
-   }
-
-   /* We can't handle format conversions between Z24 and other formats since
-    * we have to lie about the surface format.  See the comments in
-    * brw_blorp_surface_info::set().
-    */
-   if ((src_mt->format == MESA_FORMAT_Z24_UNORM_X8_UINT) !=
-       (dst_mt->format == MESA_FORMAT_Z24_UNORM_X8_UINT)) {
-      return false;
-   }
-
-   /* We also can't handle any combined depth-stencil formats because we
-    * have to reinterpret as a color format.
+   /* We can't handle any combined depth-stencil formats because we have to
+    * reinterpret as a color format.
     */
    if (_mesa_get_format_base_format(src_mt->format) == GL_DEPTH_STENCIL ||
        _mesa_get_format_base_format(dst_mt->format) == GL_DEPTH_STENCIL)
       return false;
 
-   if (!brw->mesa_format_supports_render[dst_image->TexFormat])
+   if (!brw_blorp_supports_dst_format(brw, dst_image->TexFormat))
       return false;
 
    /* Source clipping shouldn't be necessary, since copytexsubimage (in