Mesa (master): i965/gen6 depth surface: calculate more specific surface type

[Jordan Justen]

Module: Mesa
Branch: master
Commit: 48acf19d2311385f1bbec76ddceb911596f567ec
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=48acf19d2311385f1bbec76ddceb911596f567ec

Author: Jordan Justen <jordan.l.justen at intel.com>
Date:   Tue Jul  9 14:56:38 2013 -0700

i965/gen6 depth surface: calculate more specific surface type

(171e633 for gen6)

This will be used in 3DSTATE_DEPTH_BUFFER in a later patch.

Note: Cube maps are treated as 2D arrays with 6 times as
many array elements as the cube map array would have.

Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/gen6_blorp.cpp     |   17 +++++++++++++
 src/mesa/drivers/dri/i965/gen6_depth_state.c |   33 ++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/gen6_blorp.cpp b/src/mesa/drivers/dri/i965/gen6_blorp.cpp
index 1cab8b7..f75624c 100644
--- a/src/mesa/drivers/dri/i965/gen6_blorp.cpp
+++ b/src/mesa/drivers/dri/i965/gen6_blorp.cpp
@@ -780,6 +780,23 @@ gen6_blorp_emit_depth_stencil_config(struct brw_context *brw,
    uint32_t draw_x = params->depth.x_offset;
    uint32_t draw_y = params->depth.y_offset;
    uint32_t tile_mask_x, tile_mask_y;
+   uint32_t surftype;
+   GLenum gl_target = params->depth.mt->target;
+
+   switch (gl_target) {
+   case GL_TEXTURE_CUBE_MAP_ARRAY:
+   case GL_TEXTURE_CUBE_MAP:
+      /* The PRM claims that we should use BRW_SURFACE_CUBE for this
+       * situation, but experiments show that gl_Layer doesn't work when we do
+       * this.  So we use BRW_SURFACE_2D, since for rendering purposes this is
+       * equivalent.
+       */
+      surftype = BRW_SURFACE_2D;
+      break;
+   default:
+      surftype = translate_tex_target(gl_target);
+      break;
+   }
 
    brw_get_depthstencil_tile_masks(params->depth.mt,
                                    params->depth.level,
diff --git a/src/mesa/drivers/dri/i965/gen6_depth_state.c b/src/mesa/drivers/dri/i965/gen6_depth_state.c
index 5c600b7..90b718c 100644
--- a/src/mesa/drivers/dri/i965/gen6_depth_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_depth_state.c
@@ -30,6 +30,7 @@
 #include "brw_state.h"
 #include "brw_defines.h"
 
+#include "main/mtypes.h"
 #include "main/fbobject.h"
 #include "main/glformats.h"
 
@@ -43,6 +44,13 @@ gen6_emit_depth_stencil_hiz(struct brw_context *brw,
                             uint32_t width, uint32_t height,
                             uint32_t tile_x, uint32_t tile_y)
 {
+   struct gl_context *ctx = &brw->ctx;
+   struct gl_framebuffer *fb = ctx->DrawBuffer;
+   uint32_t surftype;
+   GLenum gl_target = GL_TEXTURE_2D;
+   const struct intel_renderbuffer *irb = NULL;
+   const struct gl_renderbuffer *rb = NULL;
+
    /* Enable the hiz bit if we're doing separate stencil, because it and the
     * separate stencil bit must have the same value. From Section 2.11.5.6.1.1
     * 3DSTATE_DEPTH_BUFFER, Bit 1.21 "Separate Stencil Enable":
@@ -61,6 +69,31 @@ gen6_emit_depth_stencil_hiz(struct brw_context *brw,
    intel_emit_post_sync_nonzero_flush(brw);
    intel_emit_depth_stall_flushes(brw);
 
+   irb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
+   if (!irb)
+      irb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
+   rb = (struct gl_renderbuffer*) irb;
+
+   if (rb) {
+      if (rb->TexImage)
+         gl_target = rb->TexImage->TexObject->Target;
+   }
+
+   switch (gl_target) {
+   case GL_TEXTURE_CUBE_MAP_ARRAY:
+   case GL_TEXTURE_CUBE_MAP:
+      /* The PRM claims that we should use BRW_SURFACE_CUBE for this
+       * situation, but experiments show that gl_Layer doesn't work when we do
+       * this.  So we use BRW_SURFACE_2D, since for rendering purposes this is
+       * equivalent.
+       */
+      surftype = BRW_SURFACE_2D;
+      break;
+   default:
+      surftype = translate_tex_target(gl_target);
+      break;
+   }
+
    BEGIN_BATCH(7);
    OUT_BATCH(_3DSTATE_DEPTH_BUFFER << 16 | (7 - 2));
    OUT_BATCH((depth_mt ? depth_mt->pitch - 1 : 0) |