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src/gallium/auxiliary/draw/draw_vs.c

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+/**************************************************************************
+ *
+ * Copyright 2007 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE 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]>
+  *   Brian Paul
+  */
+
+#include "util/u_math.h"
+#include "util/u_memory.h"
+
+#include "pipe/p_shader_tokens.h"
+#include "pipe/p_context.h"
+#include "pipe/p_screen.h"
+
+#include "draw_private.h"
+#include "draw_context.h"
+#include "draw_vs.h"
+
+#include "translate/translate.h"
+#include "translate/translate_cache.h"
+
+#include "tgsi/tgsi_dump.h"
+#include "tgsi/tgsi_exec.h"
+#include "tgsi/tgsi_ureg.h"
+
+#include "nir/nir_to_tgsi.h"
+
+DEBUG_GET_ONCE_BOOL_OPTION(gallium_dump_vs, "GALLIUM_DUMP_VS", false)
+
+
+struct draw_vertex_shader *
+draw_create_vertex_shader(struct draw_context *draw,
+                          const struct pipe_shader_state *shader)
+{
+   struct draw_vertex_shader *vs = NULL;
+   struct pipe_shader_state state = *shader;
+
+   if (draw->dump_vs) {
+      tgsi_dump(shader->tokens, 0);
+   }
+
+#if DRAW_LLVM_AVAILABLE
+   bool is_allocated = false;
+   if (draw->pt.middle.llvm) {
+      struct pipe_screen *screen = draw->pipe->screen;
+      if (shader->type == PIPE_SHADER_IR_NIR &&
+          !screen->shader_caps[MESA_SHADER_VERTEX].integers) {
+        state.type = PIPE_SHADER_IR_TGSI;
+        state.tokens = nir_to_tgsi(shader->ir.nir, screen);
+        is_allocated = true;
+      }
+      vs = draw_create_vs_llvm(draw, &state);
+   }
+#endif
+
+   if (!vs) {
+      vs = draw_create_vs_exec(draw, &state);
+   }
+
+#if DRAW_LLVM_AVAILABLE
+   if (is_allocated) {
+      ureg_free_tokens(state.tokens);
+   }
+#endif
+
+   if (vs) {
+      bool found_clipvertex = false;
+      vs->position_output = -1;
+      for (unsigned i = 0; i < vs->info.num_outputs; i++) {
+         if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
+             vs->info.output_semantic_index[i] == 0) {
+            vs->position_output = i;
+         } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_EDGEFLAG &&
+             vs->info.output_semantic_index[i] == 0) {
+            vs->edgeflag_output = i;
+         } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPVERTEX &&
+                  vs->info.output_semantic_index[i] == 0) {
+            found_clipvertex = true;
+            vs->clipvertex_output = i;
+         } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_VIEWPORT_INDEX) {
+            vs->viewport_index_output = i;
+         } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
+            assert(vs->info.output_semantic_index[i] <
+                         PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT);
+            vs->ccdistance_output[vs->info.output_semantic_index[i]] = i;
+         }
+      }
+      if (!found_clipvertex)
+         vs->clipvertex_output = vs->position_output;
+   }
+
+   assert(vs);
+   return vs;
+}
+
+
+void
+draw_bind_vertex_shader(struct draw_context *draw,
+                        struct draw_vertex_shader *dvs)
+{
+   draw_do_flush(draw, DRAW_FLUSH_STATE_CHANGE);
+
+   if (dvs) {
+      draw->vs.vertex_shader = dvs;
+      draw->vs.num_vs_outputs = dvs->info.num_outputs;
+      draw->vs.position_output = dvs->position_output;
+      draw->vs.edgeflag_output = dvs->edgeflag_output;
+      draw->vs.clipvertex_output = dvs->clipvertex_output;
+      draw->vs.ccdistance_output[0] = dvs->ccdistance_output[0];
+      draw->vs.ccdistance_output[1] = dvs->ccdistance_output[1];
+      dvs->prepare(dvs, draw);
+      draw_update_clip_flags(draw);
+      draw_update_viewport_flags(draw);
+   } else {
+      draw->vs.vertex_shader = NULL;
+      draw->vs.num_vs_outputs = 0;
+   }
+}
+
+
+void
+draw_delete_vertex_shader(struct draw_context *draw,
+                          struct draw_vertex_shader *dvs)
+{
+   for (unsigned i = 0; i < dvs->nr_variants; i++)
+      dvs->variant[i]->destroy(dvs->variant[i]);
+
+   dvs->nr_variants = 0;
+
+   dvs->delete(dvs);
+}
+
+
+bool
+draw_vs_init(struct draw_context *draw)
+{
+   draw->dump_vs = debug_get_option_gallium_dump_vs();
+
+   if (!draw->llvm) {
+      draw->vs.tgsi.machine = tgsi_exec_machine_create(MESA_SHADER_VERTEX);
+      if (!draw->vs.tgsi.machine)
+         return false;
+   }
+
+   draw->vs.emit_cache = translate_cache_create();
+   if (!draw->vs.emit_cache)
+      return false;
+
+   draw->vs.fetch_cache = translate_cache_create();
+   if (!draw->vs.fetch_cache)
+      return false;
+
+   return true;
+}
+
+
+void
+draw_vs_destroy(struct draw_context *draw)
+{
+   if (draw->vs.fetch_cache)
+      translate_cache_destroy(draw->vs.fetch_cache);
+
+   if (draw->vs.emit_cache)
+      translate_cache_destroy(draw->vs.emit_cache);
+
+   if (!draw->llvm)
+      tgsi_exec_machine_destroy(draw->vs.tgsi.machine);
+}
+
+
+struct draw_vs_variant *
+draw_vs_lookup_variant(struct draw_vertex_shader *vs,
+                       const struct draw_vs_variant_key *key)
+{
+   /* Lookup existing variant:
+    */
+   for (unsigned i = 0; i < vs->nr_variants; i++)
+      if (draw_vs_variant_key_compare(key, &vs->variant[i]->key) == 0)
+         return vs->variant[i];
+
+   /* Else have to create a new one:
+    */
+   struct draw_vs_variant *variant = vs->create_variant(vs, key);
+   if (!variant)
+      return NULL;
+
+   /* Add it to our list, could be smarter:
+    */
+   if (vs->nr_variants < ARRAY_SIZE(vs->variant)) {
+      vs->variant[vs->nr_variants++] = variant;
+   } else {
+      vs->last_variant++;
+      vs->last_variant %= ARRAY_SIZE(vs->variant);
+      vs->variant[vs->last_variant]->destroy(vs->variant[vs->last_variant]);
+      vs->variant[vs->last_variant] = variant;
+   }
+
+   return variant;
+}
+
+
+struct translate *
+draw_vs_get_fetch(struct draw_context *draw,
+                  struct translate_key *key)
+{
+   if (!draw->vs.fetch ||
+       translate_key_compare(&draw->vs.fetch->key, key) != 0) {
+      translate_key_sanitize(key);
+      draw->vs.fetch = translate_cache_find(draw->vs.fetch_cache, key);
+   }
+
+   return draw->vs.fetch;
+}
+
+
+struct translate *
+draw_vs_get_emit(struct draw_context *draw,
+                 struct translate_key *key)
+{
+   if (!draw->vs.emit ||
+       translate_key_compare(&draw->vs.emit->key, key) != 0) {
+      translate_key_sanitize(key);
+      draw->vs.emit = translate_cache_find(draw->vs.emit_cache, key);
+   }
+
+   return draw->vs.emit;
+}
+
+
+void
+draw_vs_attach_so(struct draw_vertex_shader *dvs,
+                  const struct pipe_stream_output_info *info)
+{
+   dvs->state.stream_output = *info;
+}
+
+
+void
+draw_vs_reset_so(struct draw_vertex_shader *dvs)
+{
+   memset(&dvs->state.stream_output, 0, sizeof(dvs->state.stream_output));
+}