svga: add new svga_state_gs.c file

Signed-off-by: Brian Paul <brianp@vmware.com>

src/gallium/drivers/svga/svga_state_gs.c

@@ -0,0 +1,264 @@
+/**********************************************************
+ * Copyright 2014 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, 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 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 AUTHORS OR COPYRIGHT HOLDERS
+ * 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.
+ *
+ **********************************************************/
+
+#include "util/u_inlines.h"
+#include "util/u_memory.h"
+#include "util/u_bitmask.h"
+#include "translate/translate.h"
+#include "tgsi/tgsi_ureg.h"
+
+#include "svga_context.h"
+#include "svga_cmd.h"
+#include "svga_shader.h"
+#include "svga_tgsi.h"
+#include "svga_streamout.h"
+#include "svga_format.h"
+
+/**
+ * If we fail to compile a geometry shader we'll use a dummy/fallback shader
+ * that simply emits the incoming vertices.
+ */
+static const struct tgsi_token *
+get_dummy_geometry_shader(void)
+{
+   //XXX
+   return NULL;
+}
+
+
+static struct svga_shader_variant *
+translate_geometry_program(struct svga_context *svga,
+                           const struct svga_geometry_shader *gs,
+                           const struct svga_compile_key *key)
+{
+   if (svga_have_vgpu10(svga)) {
+      return svga_tgsi_vgpu10_translate(svga, &gs->base, key,
+                                        PIPE_SHADER_GEOMETRY);
+   }
+   else {
+      return svga_tgsi_vgpu9_translate(&gs->base, key, PIPE_SHADER_GEOMETRY);
+   }
+}
+
+
+/**
+ * Translate TGSI shader into an svga shader variant.
+ */
+static enum pipe_error
+compile_gs(struct svga_context *svga,
+           struct svga_geometry_shader *gs,
+           const struct svga_compile_key *key,
+           struct svga_shader_variant **out_variant)
+{
+   struct svga_shader_variant *variant;
+   enum pipe_error ret = PIPE_ERROR;
+
+   variant = translate_geometry_program(svga, gs, key);
+   if (variant == NULL) {
+      /* some problem during translation, try the dummy shader */
+      const struct tgsi_token *dummy = get_dummy_geometry_shader();
+      if (!dummy) {
+         ret = PIPE_ERROR_OUT_OF_MEMORY;
+         goto fail;
+      }
+      debug_printf("Failed to compile geometry shader, using dummy shader instead.\n");
+      FREE((void *) gs->base.tokens);
+      gs->base.tokens = dummy;
+      variant = translate_geometry_program(svga, gs, key);
+      if (variant == NULL) {
+         ret = PIPE_ERROR;
+         goto fail;
+      }
+   }
+
+   ret = svga_define_shader(svga, SVGA3D_SHADERTYPE_GS, variant);
+   if (ret != PIPE_OK)
+      goto fail;
+
+   *out_variant = variant;
+
+   return PIPE_OK;
+
+fail:
+   if (variant) {
+      svga_destroy_shader_variant(svga, SVGA3D_SHADERTYPE_GS, variant);
+   }
+   return ret;
+}
+
+static void
+make_gs_key(struct svga_context *svga, struct svga_compile_key *key)
+{
+   struct svga_geometry_shader *gs = svga->curr.gs;
+
+   memset(key, 0, sizeof *key);
+
+   /*
+    * SVGA_NEW_TEXTURE_BINDING | SVGA_NEW_SAMPLER
+    */
+   svga_init_shader_key_common(svga, PIPE_SHADER_GEOMETRY, key);
+
+   memcpy(key->generic_remap_table, gs->generic_remap_table,
+          sizeof(gs->generic_remap_table));
+
+   key->gs.vs_generic_outputs = svga->curr.vs->generic_outputs;
+
+   key->gs.need_prescale = svga->state.hw_clear.prescale.enabled;
+
+   key->gs.writes_psize = gs->base.info.writes_psize;
+   key->gs.wide_point = gs->wide_point;
+   key->sprite_coord_enable = svga->curr.rast->templ.sprite_coord_enable;
+   key->sprite_origin_lower_left = (svga->curr.rast->templ.sprite_coord_mode
+                                    == PIPE_SPRITE_COORD_LOWER_LEFT);
+
+   /* SVGA_NEW_RAST */
+   key->clip_plane_enable = svga->curr.rast->templ.clip_plane_enable;
+}
+
+
+/**
+ * svga_reemit_gs_bindings - Reemit the geometry shader bindings
+ */
+enum pipe_error
+svga_reemit_gs_bindings(struct svga_context *svga)
+{
+   enum pipe_error ret;
+   struct svga_winsys_gb_shader *gbshader = NULL;
+   SVGA3dShaderId shaderId = SVGA3D_INVALID_ID;
+
+   assert(svga->rebind.flags.gs);
+   assert(svga_have_gb_objects(svga));
+
+   /* Geometry Shader is only supported in vgpu10 */
+   assert(svga_have_vgpu10(svga));
+
+   if (svga->state.hw_draw.gs) {
+      gbshader = svga->state.hw_draw.gs->gb_shader;
+      shaderId = svga->state.hw_draw.gs->id;
+   }
+
+   if (!svga_need_to_rebind_resources(svga)) {
+      ret =  svga->swc->resource_rebind(svga->swc, NULL, gbshader,
+                                        SVGA_RELOC_READ);
+      goto out;
+   }
+
+   ret = SVGA3D_vgpu10_SetShader(svga->swc, SVGA3D_SHADERTYPE_GS,
+                                 gbshader, shaderId);
+
+ out:
+   if (ret != PIPE_OK)
+      return ret;
+
+   svga->rebind.flags.gs = FALSE;
+   return PIPE_OK;
+}
+
+static enum pipe_error
+emit_hw_gs(struct svga_context *svga, unsigned dirty)
+{
+   struct svga_shader_variant *variant;
+   struct svga_geometry_shader *gs = svga->curr.gs;
+   enum pipe_error ret = PIPE_OK;
+   struct svga_compile_key key;
+
+   /* If there's a user-defined GS, we should have a pointer to a derived
+    * GS.  This should have been resolved in update_tgsi_transform().
+    */
+   if (svga->curr.user_gs)
+      assert(svga->curr.gs);
+
+   if (gs == NULL) {
+      if (svga->state.hw_draw.gs != NULL) {
+
+         /** The previous geometry shader is made inactive.
+          *  Needs to unbind the geometry shader.
+          */
+         ret = svga_set_shader(svga, SVGA3D_SHADERTYPE_GS, NULL);
+         svga->state.hw_draw.gs = NULL;
+      }
+      return ret;
+   }
+
+   /* If there is stream output info for this geometry shader, then use
+    * it instead of the one from the vertex shader.
+    */
+   if (svga_have_gs_streamout(svga)) {
+      svga_set_stream_output(svga, gs->base.stream_output);
+   }
+   else if (!svga_have_vs_streamout(svga)) {
+      /* turn off stream out */
+      svga_set_stream_output(svga, NULL);
+   }
+
+   /* SVGA_NEW_NEED_SWTNL */
+   if (svga->state.sw.need_swtnl && !svga_have_vgpu10(svga)) {
+      /* No geometry shader is needed */
+      variant = NULL;
+   }
+   else {
+      make_gs_key(svga, &key);
+
+      /* See if we already have a GS variant that matches the key */
+      variant = svga_search_shader_key(&gs->base, &key);
+
+      if (!variant) {
+         ret = compile_gs(svga, gs, &key, &variant);
+         if (ret != PIPE_OK)
+            return ret;
+
+         /* insert the new variant at head of linked list */
+         assert(variant);
+         variant->next = gs->base.variants;
+         gs->base.variants = variant;
+      }
+   }
+
+   if (variant != svga->state.hw_draw.gs) {
+      /* Bind the new variant */
+      ret = svga_set_shader(svga, SVGA3D_SHADERTYPE_GS, variant);
+      if (ret != PIPE_OK)
+         return ret;
+
+      svga->rebind.flags.gs = FALSE;
+      svga->dirty |= SVGA_NEW_GS_VARIANT;
+      svga->state.hw_draw.gs = variant;
+   }
+
+   return PIPE_OK;
+}
+
+struct svga_tracked_state svga_hw_gs =
+{
+   "geometry shader (hwtnl)",
+   (SVGA_NEW_VS |
+    SVGA_NEW_FS |
+    SVGA_NEW_GS |
+    SVGA_NEW_TEXTURE_BINDING |
+    SVGA_NEW_SAMPLER |
+    SVGA_NEW_RAST |
+    SVGA_NEW_NEED_SWTNL),
+   emit_hw_gs
+};