i965: Rename brw_gs{,_emit}.[ch] to brw_ff_gs{,_emit}.[ch].

The brw_gs.[ch] and brw_gs_emit.c source files contain code for
emulating fixed-function unit functionality (VF primitive decomposition
or SOL) using the GS unit.  They do not contain code to support proper
geometry shaders.

We've taken to calling that code "ff_gs" (see brw_ff_gs_prog_key,
brw_ff_gs_prog_data, brw_context::ff_gs, brw_ff_gs_compile,
brw_ff_gs_prog).  So it makes sense to make the filenames match.

Signed-off-by: Kenneth Graunke <[email protected]>
Acked-by: Matt Turner <[email protected]>
Acked-by: Jason Ekstrand <[email protected]>
Acked-by: Iago Toral Quiroga <[email protected]>

1 files changed, 259 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_ff_gs.c b/src/mesa/drivers/dri/i965/brw_ff_gs.c
new file mode 100644
index 00000000000..6ca9e7f51e9
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_ff_gs.c
@@ -0,0 +1,259 @@
+/*
+ Copyright (C) Intel Corp.  2006.  All Rights Reserved.
+ Intel funded Tungsten Graphics to
+ develop this 3D driver.
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice (including the
+ next paragraph) shall be included in all copies or substantial
+ portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ **********************************************************************/
+ /*
+  * Authors:
+  *   Keith Whitwell <[email protected]>
+  */
+
+#include "main/glheader.h"
+#include "main/macros.h"
+#include "main/enums.h"
+#include "main/transformfeedback.h"
+
+#include "intel_batchbuffer.h"
+
+#include "brw_defines.h"
+#include "brw_context.h"
+#include "brw_eu.h"
+#include "brw_util.h"
+#include "brw_state.h"
+#include "brw_ff_gs.h"
+
+#include "util/ralloc.h"
+
+static void compile_ff_gs_prog(struct brw_context *brw,
+                               struct brw_ff_gs_prog_key *key)
+{
+   struct brw_ff_gs_compile c;
+   const GLuint *program;
+   void *mem_ctx;
+   GLuint program_size;
+
+   memset(&c, 0, sizeof(c));
+
+   c.key = *key;
+   c.vue_map = brw->vs.prog_data->base.vue_map;
+   c.nr_regs = (c.vue_map.num_slots + 1)/2;
+
+   mem_ctx = ralloc_context(NULL);
+
+   /* Begin the compilation:
+    */
+   brw_init_compile(brw, &c.func, mem_ctx);
+
+   c.func.single_program_flow = 1;
+
+   /* For some reason the thread is spawned with only 4 channels
+    * unmasked.
+    */
+   brw_set_default_mask_control(&c.func, BRW_MASK_DISABLE);
+
+   if (brw->gen >= 6) {
+      unsigned num_verts;
+      bool check_edge_flag;
+      /* On Sandybridge, we use the GS for implementing transform feedback
+       * (called "Stream Out" in the PRM).
+       */
+      switch (key->primitive) {
+      case _3DPRIM_POINTLIST:
+         num_verts = 1;
+         check_edge_flag = false;
+	 break;
+      case _3DPRIM_LINELIST:
+      case _3DPRIM_LINESTRIP:
+      case _3DPRIM_LINELOOP:
+         num_verts = 2;
+         check_edge_flag = false;
+	 break;
+      case _3DPRIM_TRILIST:
+      case _3DPRIM_TRIFAN:
+      case _3DPRIM_TRISTRIP:
+      case _3DPRIM_RECTLIST:
+	 num_verts = 3;
+         check_edge_flag = false;
+         break;
+      case _3DPRIM_QUADLIST:
+      case _3DPRIM_QUADSTRIP:
+      case _3DPRIM_POLYGON:
+         num_verts = 3;
+         check_edge_flag = true;
+         break;
+      default:
+	 unreachable("Unexpected primitive type in Gen6 SOL program.");
+      }
+      gen6_sol_program(&c, key, num_verts, check_edge_flag);
+   } else {
+      /* On Gen4-5, we use the GS to decompose certain types of primitives.
+       * Note that primitives which don't require a GS program have already
+       * been weeded out by now.
+       */
+      switch (key->primitive) {
+      case _3DPRIM_QUADLIST:
+	 brw_ff_gs_quads( &c, key );
+	 break;
+      case _3DPRIM_QUADSTRIP:
+	 brw_ff_gs_quad_strip( &c, key );
+	 break;
+      case _3DPRIM_LINELOOP:
+	 brw_ff_gs_lines( &c );
+	 break;
+      default:
+	 ralloc_free(mem_ctx);
+	 return;
+      }
+   }
+
+   brw_compact_instructions(&c.func, 0, 0, NULL);
+
+   /* get the program
+    */
+   program = brw_get_program(&c.func, &program_size);
+
+   if (unlikely(INTEL_DEBUG & DEBUG_GS)) {
+      fprintf(stderr, "gs:\n");
+      brw_disassemble(brw, c.func.store, 0, program_size, stderr);
+      fprintf(stderr, "\n");
+    }
+
+   brw_upload_cache(&brw->cache, BRW_FF_GS_PROG,
+		    &c.key, sizeof(c.key),
+		    program, program_size,
+		    &c.prog_data, sizeof(c.prog_data),
+		    &brw->ff_gs.prog_offset, &brw->ff_gs.prog_data);
+   ralloc_free(mem_ctx);
+}
+
+static void populate_key(struct brw_context *brw,
+                         struct brw_ff_gs_prog_key *key)
+{
+   static const unsigned swizzle_for_offset[4] = {
+      BRW_SWIZZLE4(0, 1, 2, 3),
+      BRW_SWIZZLE4(1, 2, 3, 3),
+      BRW_SWIZZLE4(2, 3, 3, 3),
+      BRW_SWIZZLE4(3, 3, 3, 3)
+   };
+
+   struct gl_context *ctx = &brw->ctx;
+
+   memset(key, 0, sizeof(*key));
+
+   /* CACHE_NEW_VS_PROG (part of VUE map) */
+   key->attrs = brw->vs.prog_data->base.vue_map.slots_valid;
+
+   /* BRW_NEW_PRIMITIVE */
+   key->primitive = brw->primitive;
+
+   /* _NEW_LIGHT */
+   key->pv_first = (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION);
+   if (key->primitive == _3DPRIM_QUADLIST && ctx->Light.ShadeModel != GL_FLAT) {
+      /* Provide consistent primitive order with brw_set_prim's
+       * optimization of single quads to trifans.
+       */
+      key->pv_first = true;
+   }
+
+   if (brw->gen >= 7) {
+      /* On Gen7 and later, we don't use GS (yet). */
+      key->need_gs_prog = false;
+   } else if (brw->gen == 6) {
+      /* On Gen6, GS is used for transform feedback. */
+      /* BRW_NEW_TRANSFORM_FEEDBACK */
+      if (_mesa_is_xfb_active_and_unpaused(ctx)) {
+         const struct gl_shader_program *shaderprog =
+            ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX];
+         const struct gl_transform_feedback_info *linked_xfb_info =
+            &shaderprog->LinkedTransformFeedback;
+         int i;
+
+         /* Make sure that the VUE slots won't overflow the unsigned chars in
+          * key->transform_feedback_bindings[].
+          */
+         STATIC_ASSERT(BRW_VARYING_SLOT_COUNT <= 256);
+
+         /* Make sure that we don't need more binding table entries than we've
+          * set aside for use in transform feedback.  (We shouldn't, since we
+          * set aside enough binding table entries to have one per component).
+          */
+         assert(linked_xfb_info->NumOutputs <= BRW_MAX_SOL_BINDINGS);
+
+         key->need_gs_prog = true;
+         key->num_transform_feedback_bindings = linked_xfb_info->NumOutputs;
+         for (i = 0; i < key->num_transform_feedback_bindings; ++i) {
+            key->transform_feedback_bindings[i] =
+               linked_xfb_info->Outputs[i].OutputRegister;
+            key->transform_feedback_swizzles[i] =
+               swizzle_for_offset[linked_xfb_info->Outputs[i].ComponentOffset];
+         }
+      }
+   } else {
+      /* Pre-gen6, GS is used to transform QUADLIST, QUADSTRIP, and LINELOOP
+       * into simpler primitives.
+       */
+      key->need_gs_prog = (brw->primitive == _3DPRIM_QUADLIST ||
+                           brw->primitive == _3DPRIM_QUADSTRIP ||
+                           brw->primitive == _3DPRIM_LINELOOP);
+   }
+}
+
+/* Calculate interpolants for triangle and line rasterization.
+ */
+static void
+brw_upload_ff_gs_prog(struct brw_context *brw)
+{
+   struct brw_ff_gs_prog_key key;
+   /* Populate the key:
+    */
+   populate_key(brw, &key);
+
+   if (brw->ff_gs.prog_active != key.need_gs_prog) {
+      brw->state.dirty.cache |= CACHE_NEW_FF_GS_PROG;
+      brw->ff_gs.prog_active = key.need_gs_prog;
+   }
+
+   if (brw->ff_gs.prog_active) {
+      if (!brw_search_cache(&brw->cache, BRW_FF_GS_PROG,
+			    &key, sizeof(key),
+			    &brw->ff_gs.prog_offset, &brw->ff_gs.prog_data)) {
+	 compile_ff_gs_prog( brw, &key );
+      }
+   }
+}
+
+void gen6_brw_upload_ff_gs_prog(struct brw_context *brw)
+{
+   brw_upload_ff_gs_prog(brw);
+}
+
+const struct brw_tracked_state brw_ff_gs_prog = {
+   .dirty = {
+      .mesa  = (_NEW_LIGHT),
+      .brw   = (BRW_NEW_PRIMITIVE |
+                BRW_NEW_TRANSFORM_FEEDBACK),
+      .cache = CACHE_NEW_VS_PROG
+   },
+   .emit = brw_upload_ff_gs_prog
+};