i965: Add helper for lossless compression support

[mesa.git] / src / mesa / drivers / dri / i965 / intel_mipmap_tree.h

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
index 486e5c6f43b7b3accde8e753a0aa56b5a7254e3f..4c6877eed9d7e9f1e458a44923ef4956b98e707a 100644 (file)
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
@@ -633,15 +633,22 @@ struct intel_mipmap_tree
     * The SURFACE_STATE bits associated with the last fast color clear to this
     * color mipmap tree, if any.
     *
-    * This value will only ever contain ones in bits 28-31, so it is safe to
-    * OR into dword 7 of SURFACE_STATE.
+    * Prior to GEN9 there is a single bit for RGBA clear values which gives you
+    * the option of 2^4 clear colors. Each bit determines if the color channel
+    * is fully saturated or unsaturated (Cherryview does add a 32b value per
+    * channel, but it is globally applied instead of being part of the render
+    * surface state). Starting with GEN9, the surface state accepts a 32b value
+    * for each color channel.
     *
     * @see RENDER_SURFACE_STATE.RedClearColor
     * @see RENDER_SURFACE_STATE.GreenClearColor
     * @see RENDER_SURFACE_STATE.BlueClearColor
     * @see RENDER_SURFACE_STATE.AlphaClearColor
     */
-   uint32_t fast_clear_color_value;
+   union {
+      uint32_t fast_clear_color_value;
+      union gl_color_union gen9_fast_clear_color;
+   };
 
    /**
     * Disable allocation of auxiliary buffers, such as the HiZ buffer and MCS
@@ -656,13 +663,25 @@ struct intel_mipmap_tree
 };
 
 void
-intel_get_non_msrt_mcs_alignment(struct intel_mipmap_tree *mt,
+intel_get_non_msrt_mcs_alignment(const struct intel_mipmap_tree *mt,
                                  unsigned *width_px, unsigned *height);
+
+bool
+intel_miptree_is_lossless_compressed(const struct brw_context *brw,
+                                     const struct intel_mipmap_tree *mt);
+
 bool
-intel_tiling_supports_non_msrt_mcs(struct brw_context *brw, unsigned tiling);
+intel_tiling_supports_non_msrt_mcs(const struct brw_context *brw,
+                                   unsigned tiling);
+
 bool
-intel_miptree_is_fast_clear_capable(struct brw_context *brw,
-                                    struct intel_mipmap_tree *mt);
+intel_miptree_supports_non_msrt_fast_clear(struct brw_context *brw,
+                                           const struct intel_mipmap_tree *mt);
+
+bool
+intel_miptree_supports_lossless_compressed(struct brw_context *brw,
+                                           const struct intel_mipmap_tree *mt);
+
 bool
 intel_miptree_alloc_non_msrt_mcs(struct brw_context *brw,
                                  struct intel_mipmap_tree *mt);
@@ -881,9 +900,19 @@ intel_miptree_used_for_rendering(struct intel_mipmap_tree *mt)
       mt->fast_clear_state = INTEL_FAST_CLEAR_STATE_UNRESOLVED;
 }
 
+/**
+ * Flag values telling color resolve pass which special types of buffers
+ * can be ignored.
+ *
+ * INTEL_MIPTREE_IGNORE_CCS_E:   Lossless compressed (single-sample
+ *                               compression scheme since gen9)
+ */
+#define INTEL_MIPTREE_IGNORE_CCS_E (1 << 0)
+
 void
 intel_miptree_resolve_color(struct brw_context *brw,
-                            struct intel_mipmap_tree *mt);
+                            struct intel_mipmap_tree *mt,
+                            int flags);
 
 void
 intel_miptree_make_shareable(struct brw_context *brw,