st/mesa: add conversion for tessellation shaders

Based on code from Ilia Mirkin <imirkin@alum.mit.edu>.

1 files changed, 219 insertions, 88 deletions

diff --git a/src/mesa/state_tracker/st_program.c b/src/mesa/state_tracker/st_program.c
index 9925794..e62dd7a 100644
--- a/src/mesa/state_tracker/st_program.c
+++ b/src/mesa/state_tracker/st_program.c
@@ -932,61 +932,52 @@ st_get_fp_variant(struct st_context *st,
 
 
 /**
- * Translate a geometry program to create a new variant.
+ * Translate a program. This is common code for geometry and tessellation
+ * shaders.
  */
-static struct st_gp_variant *
-st_translate_geometry_program(struct st_context *st,
-                              struct st_geometry_program *stgp,
-                              const struct st_gp_variant_key *key)
+static void
+st_translate_program_common(struct st_context *st,
+                            struct gl_program *prog,
+                            struct glsl_to_tgsi_visitor *glsl_to_tgsi,
+                            struct ureg_program *ureg,
+                            unsigned tgsi_processor,
+                            struct pipe_shader_state *out_state)
 {
-   GLuint inputSlotToAttr[VARYING_SLOT_MAX];
-   GLuint inputMapping[VARYING_SLOT_MAX];
-   GLuint outputSlotToAttr[VARYING_SLOT_MAX];
-   GLuint outputMapping[VARYING_SLOT_MAX];
-   struct pipe_context *pipe = st->pipe;
+   GLuint inputSlotToAttr[VARYING_SLOT_TESS_MAX];
+   GLuint inputMapping[VARYING_SLOT_TESS_MAX];
+   GLuint outputSlotToAttr[VARYING_SLOT_TESS_MAX];
+   GLuint outputMapping[VARYING_SLOT_TESS_MAX];
    GLuint attr;
 
-   uint gs_num_inputs = 0;
-
    ubyte input_semantic_name[PIPE_MAX_SHADER_INPUTS];
    ubyte input_semantic_index[PIPE_MAX_SHADER_INPUTS];
+   uint num_inputs = 0;
 
-   ubyte gs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
-   ubyte gs_output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
-   uint gs_num_outputs = 0;
+   ubyte output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
+   ubyte output_semantic_index[PIPE_MAX_SHADER_OUTPUTS];
+   uint num_outputs = 0;
 
    GLint i;
-   struct ureg_program *ureg;
-   struct pipe_shader_state state = {0};
-   struct st_gp_variant *gpv;
-
-   gpv = CALLOC_STRUCT(st_gp_variant);
-   if (!gpv)
-      return NULL;
-
-   ureg = ureg_create_with_screen(TGSI_PROCESSOR_GEOMETRY, st->pipe->screen);
-   if (ureg == NULL) {
-      free(gpv);
-      return NULL;
-   }
 
    memset(inputSlotToAttr, 0, sizeof(inputSlotToAttr));
    memset(inputMapping, 0, sizeof(inputMapping));
    memset(outputSlotToAttr, 0, sizeof(outputSlotToAttr));
    memset(outputMapping, 0, sizeof(outputMapping));
+   memset(out_state, 0, sizeof(*out_state));
 
    /*
     * Convert Mesa program inputs to TGSI input register semantics.
     */
    for (attr = 0; attr < VARYING_SLOT_MAX; attr++) {
-      if ((stgp->Base.Base.InputsRead & BITFIELD64_BIT(attr)) != 0) {
-         const GLuint slot = gs_num_inputs++;
+      if ((prog->InputsRead & BITFIELD64_BIT(attr)) != 0) {
+         const GLuint slot = num_inputs++;
 
          inputMapping[attr] = slot;
          inputSlotToAttr[slot] = attr;
 
          switch (attr) {
          case VARYING_SLOT_PRIMITIVE_ID:
+            assert(tgsi_processor == TGSI_PROCESSOR_GEOMETRY);
             input_semantic_name[slot] = TGSI_SEMANTIC_PRIMID;
             input_semantic_index[slot] = 0;
             break;
@@ -1038,19 +1029,33 @@ st_translate_geometry_program(struct st_context *st,
             /* fall through */
          case VARYING_SLOT_VAR0:
          default:
-            assert(attr >= VARYING_SLOT_VAR0 && attr < VARYING_SLOT_MAX);
+            assert(attr >= VARYING_SLOT_VAR0 ||
+                   (attr >= VARYING_SLOT_TEX0 && attr <= VARYING_SLOT_TEX7));
             input_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
             input_semantic_index[slot] =
                st_get_generic_varying_index(st, attr);
-         break;
+            break;
          }
       }
    }
 
+   /* Also add patch inputs. */
+   for (attr = 0; attr < 32; attr++) {
+      if (prog->PatchInputsRead & (1 << attr)) {
+         GLuint slot = num_inputs++;
+         GLuint patch_attr = VARYING_SLOT_PATCH0 + attr;
+
+         inputMapping[patch_attr] = slot;
+         inputSlotToAttr[slot] = patch_attr;
+         input_semantic_name[slot] = TGSI_SEMANTIC_PATCH;
+         input_semantic_index[slot] = attr;
+      }
+   }
+
    /* initialize output semantics to defaults */
    for (i = 0; i < PIPE_MAX_SHADER_OUTPUTS; i++) {
-      gs_output_semantic_name[i] = TGSI_SEMANTIC_GENERIC;
-      gs_output_semantic_index[i] = 0;
+      output_semantic_name[i] = TGSI_SEMANTIC_GENERIC;
+      output_semantic_index[i] = 0;
    }
 
    /*
@@ -1058,8 +1063,8 @@ st_translate_geometry_program(struct st_context *st,
     * mapping and the semantic information for each output.
     */
    for (attr = 0; attr < VARYING_SLOT_MAX; attr++) {
-      if (stgp->Base.Base.OutputsWritten & BITFIELD64_BIT(attr)) {
-         GLuint slot = gs_num_outputs++;
+      if (prog->OutputsWritten & BITFIELD64_BIT(attr)) {
+         GLuint slot = num_outputs++;
 
          outputMapping[attr] = slot;
          outputSlotToAttr[slot] = attr;
@@ -1067,56 +1072,64 @@ st_translate_geometry_program(struct st_context *st,
          switch (attr) {
          case VARYING_SLOT_POS:
             assert(slot == 0);
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_POSITION;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_COL0:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_COL1:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
-            gs_output_semantic_index[slot] = 1;
+            output_semantic_name[slot] = TGSI_SEMANTIC_COLOR;
+            output_semantic_index[slot] = 1;
             break;
          case VARYING_SLOT_BFC0:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_BFC1:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
-            gs_output_semantic_index[slot] = 1;
+            output_semantic_name[slot] = TGSI_SEMANTIC_BCOLOR;
+            output_semantic_index[slot] = 1;
             break;
          case VARYING_SLOT_FOGC:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_FOG;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_PSIZ:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_CLIP_VERTEX:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_CLIPVERTEX;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_CLIPVERTEX;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_CLIP_DIST0:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_CLIP_DIST1:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
-            gs_output_semantic_index[slot] = 1;
+            output_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
+            output_semantic_index[slot] = 1;
             break;
          case VARYING_SLOT_LAYER:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_LAYER;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_LAYER;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_PRIMITIVE_ID:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_PRIMID;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_PRIMID;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_VIEWPORT:
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_VIEWPORT_INDEX;
-            gs_output_semantic_index[slot] = 0;
+            output_semantic_name[slot] = TGSI_SEMANTIC_VIEWPORT_INDEX;
+            output_semantic_index[slot] = 0;
+            break;
+         case VARYING_SLOT_TESS_LEVEL_OUTER:
+            output_semantic_name[slot] = TGSI_SEMANTIC_TESSOUTER;
+            output_semantic_index[slot] = 0;
+            break;
+         case VARYING_SLOT_TESS_LEVEL_INNER:
+            output_semantic_name[slot] = TGSI_SEMANTIC_TESSINNER;
+            output_semantic_index[slot] = 0;
             break;
          case VARYING_SLOT_TEX0:
          case VARYING_SLOT_TEX1:
@@ -1127,36 +1140,44 @@ st_translate_geometry_program(struct st_context *st,
          case VARYING_SLOT_TEX6:
          case VARYING_SLOT_TEX7:
             if (st->needs_texcoord_semantic) {
-               gs_output_semantic_name[slot] = TGSI_SEMANTIC_TEXCOORD;
-               gs_output_semantic_index[slot] = attr - VARYING_SLOT_TEX0;
+               output_semantic_name[slot] = TGSI_SEMANTIC_TEXCOORD;
+               output_semantic_index[slot] = attr - VARYING_SLOT_TEX0;
                break;
             }
             /* fall through */
          case VARYING_SLOT_VAR0:
          default:
-            assert(slot < ARRAY_SIZE(gs_output_semantic_name));
-            assert(attr >= VARYING_SLOT_VAR0);
-            gs_output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
-            gs_output_semantic_index[slot] =
+            assert(slot < ARRAY_SIZE(output_semantic_name));
+            assert(attr >= VARYING_SLOT_VAR0 ||
+                   (attr >= VARYING_SLOT_TEX0 && attr <= VARYING_SLOT_TEX7));
+            output_semantic_name[slot] = TGSI_SEMANTIC_GENERIC;
+            output_semantic_index[slot] =
                st_get_generic_varying_index(st, attr);
-         break;
+            break;
          }
       }
    }
 
-   ureg_property(ureg, TGSI_PROPERTY_GS_INPUT_PRIM, stgp->Base.InputType);
-   ureg_property(ureg, TGSI_PROPERTY_GS_OUTPUT_PRIM, stgp->Base.OutputType);
-   ureg_property(ureg, TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES,
-                 stgp->Base.VerticesOut);
-   ureg_property(ureg, TGSI_PROPERTY_GS_INVOCATIONS, stgp->Base.Invocations);
+   /* Also add patch outputs. */
+   for (attr = 0; attr < 32; attr++) {
+      if (prog->PatchOutputsWritten & (1 << attr)) {
+         GLuint slot = num_outputs++;
+         GLuint patch_attr = VARYING_SLOT_PATCH0 + attr;
+
+         outputMapping[patch_attr] = slot;
+         outputSlotToAttr[slot] = patch_attr;
+         output_semantic_name[slot] = TGSI_SEMANTIC_PATCH;
+         output_semantic_index[slot] = attr;
+      }
+   }
 
    st_translate_program(st->ctx,
-                        TGSI_PROCESSOR_GEOMETRY,
+                        tgsi_processor,
                         ureg,
-                        stgp->glsl_to_tgsi,
-                        &stgp->Base.Base,
+                        glsl_to_tgsi,
+                        prog,
                         /* inputs */
-                        gs_num_inputs,
+                        num_inputs,
                         inputMapping,
                         inputSlotToAttr,
                         input_semantic_name,
@@ -1164,30 +1185,64 @@ st_translate_geometry_program(struct st_context *st,
                         NULL,
                         NULL,
                         /* outputs */
-                        gs_num_outputs,
+                        num_outputs,
                         outputMapping,
                         outputSlotToAttr,
-                        gs_output_semantic_name,
-                        gs_output_semantic_index,
+                        output_semantic_name,
+                        output_semantic_index,
                         FALSE,
                         FALSE);
 
-   state.tokens = ureg_get_tokens(ureg, NULL);
+   out_state->tokens = ureg_get_tokens(ureg, NULL);
    ureg_destroy(ureg);
 
-   st_translate_stream_output_info(stgp->glsl_to_tgsi,
+   st_translate_stream_output_info(glsl_to_tgsi,
                                    outputMapping,
-                                   &state.stream_output);
+                                   &out_state->stream_output);
 
    if ((ST_DEBUG & DEBUG_TGSI) && (ST_DEBUG & DEBUG_MESA)) {
-      _mesa_print_program(&stgp->Base.Base);
+      _mesa_print_program(prog);
       debug_printf("\n");
    }
 
    if (ST_DEBUG & DEBUG_TGSI) {
-      tgsi_dump(state.tokens, 0);
+      tgsi_dump(out_state->tokens, 0);
       debug_printf("\n");
    }
+}
+
+
+/**
+ * Translate a geometry program to create a new variant.
+ */
+static struct st_gp_variant *
+st_translate_geometry_program(struct st_context *st,
+                              struct st_geometry_program *stgp,
+                              const struct st_gp_variant_key *key)
+{
+   struct pipe_context *pipe = st->pipe;
+   struct ureg_program *ureg;
+   struct st_gp_variant *gpv;
+   struct pipe_shader_state state;
+
+   ureg = ureg_create_with_screen(TGSI_PROCESSOR_GEOMETRY, st->pipe->screen);
+   if (ureg == NULL)
+      return NULL;
+
+   ureg_property(ureg, TGSI_PROPERTY_GS_INPUT_PRIM, stgp->Base.InputType);
+   ureg_property(ureg, TGSI_PROPERTY_GS_OUTPUT_PRIM, stgp->Base.OutputType);
+   ureg_property(ureg, TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES,
+                 stgp->Base.VerticesOut);
+   ureg_property(ureg, TGSI_PROPERTY_GS_INVOCATIONS, stgp->Base.Invocations);
+
+   st_translate_program_common(st, &stgp->Base.Base, stgp->glsl_to_tgsi, ureg,
+                               TGSI_PROCESSOR_GEOMETRY, &state);
+
+   gpv = CALLOC_STRUCT(st_gp_variant);
+   if (!gpv) {
+      ureg_free_tokens(state.tokens);
+      return NULL;
+   }
 
    /* fill in new variant */
    gpv->driver_shader = pipe->create_gs_state(pipe, &state);
@@ -1237,7 +1292,34 @@ st_translate_tessctrl_program(struct st_context *st,
                               struct st_tessctrl_program *sttcp,
                               const struct st_tcp_variant_key *key)
 {
-   return NULL; /* will be updated in the next commit */
+   struct pipe_context *pipe = st->pipe;
+   struct ureg_program *ureg;
+   struct st_tcp_variant *tcpv;
+   struct pipe_shader_state state;
+
+   ureg = ureg_create_with_screen(TGSI_PROCESSOR_TESS_CTRL, pipe->screen);
+   if (ureg == NULL) {
+      return NULL;
+   }
+
+   ureg_property(ureg, TGSI_PROPERTY_TCS_VERTICES_OUT,
+                 sttcp->Base.VerticesOut);
+
+   st_translate_program_common(st, &sttcp->Base.Base, sttcp->glsl_to_tgsi,
+                               ureg, TGSI_PROCESSOR_TESS_CTRL, &state);
+
+   tcpv = CALLOC_STRUCT(st_tcp_variant);
+   if (!tcpv) {
+      ureg_free_tokens(state.tokens);
+      return NULL;
+   }
+
+   /* fill in new variant */
+   tcpv->driver_shader = pipe->create_tcs_state(pipe, &state);
+   tcpv->key = *key;
+
+   ureg_free_tokens(state.tokens);
+   return tcpv;
 }
 
 
@@ -1280,7 +1362,56 @@ st_translate_tesseval_program(struct st_context *st,
                               struct st_tesseval_program *sttep,
                               const struct st_tep_variant_key *key)
 {
-   return NULL; /* will be updated in the next commit */
+   struct pipe_context *pipe = st->pipe;
+   struct ureg_program *ureg;
+   struct st_tep_variant *tepv;
+   struct pipe_shader_state state;
+
+   ureg = ureg_create_with_screen(TGSI_PROCESSOR_TESS_EVAL, pipe->screen);
+   if (ureg == NULL) {
+      return NULL;
+   }
+
+   if (sttep->Base.PrimitiveMode == GL_ISOLINES)
+      ureg_property(ureg, TGSI_PROPERTY_TES_PRIM_MODE, GL_LINES);
+   else
+      ureg_property(ureg, TGSI_PROPERTY_TES_PRIM_MODE, sttep->Base.PrimitiveMode);
+
+   switch (sttep->Base.Spacing) {
+   case GL_EQUAL:
+      ureg_property(ureg, TGSI_PROPERTY_TES_SPACING, PIPE_TESS_SPACING_EQUAL);
+      break;
+   case GL_FRACTIONAL_EVEN:
+      ureg_property(ureg, TGSI_PROPERTY_TES_SPACING,
+                    PIPE_TESS_SPACING_FRACTIONAL_EVEN);
+      break;
+   case GL_FRACTIONAL_ODD:
+      ureg_property(ureg, TGSI_PROPERTY_TES_SPACING,
+                    PIPE_TESS_SPACING_FRACTIONAL_ODD);
+      break;
+   default:
+      assert(0);
+   }
+
+   ureg_property(ureg, TGSI_PROPERTY_TES_VERTEX_ORDER_CW,
+                 sttep->Base.VertexOrder == GL_CW);
+   ureg_property(ureg, TGSI_PROPERTY_TES_POINT_MODE, sttep->Base.PointMode);
+
+   st_translate_program_common(st, &sttep->Base.Base, sttep->glsl_to_tgsi,
+                               ureg, TGSI_PROCESSOR_TESS_EVAL, &state);
+
+   tepv = CALLOC_STRUCT(st_tep_variant);
+   if (!tepv) {
+      ureg_free_tokens(state.tokens);
+      return NULL;
+   }
+
+   /* fill in new variant */
+   tepv->driver_shader = pipe->create_tes_state(pipe, &state);
+   tepv->key = *key;
+
+   ureg_free_tokens(state.tokens);
+   return tepv;
 }