/*
 * Mesa 3-D graphics library
 *
 * Copyright © 2015 Red Hat
 *
 * 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 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.
 *
 * Authors:
 *    Rob Clark <robclark@freedesktop.org>
 */

#include "shader_enums.h"
#include "util/macros.h"
#include "mesa/main/config.h"

#define ENUM(x) [x] = #x
#define NAME(val) ((((val) < ARRAY_SIZE(names)) && names[(val)]) ? names[(val)] : "UNKNOWN")

const char * gl_shader_stage_name(gl_shader_stage stage)
{
   static const char *names[] = {
      ENUM(MESA_SHADER_VERTEX),
      ENUM(MESA_SHADER_TESS_CTRL),
      ENUM(MESA_SHADER_TESS_EVAL),
      ENUM(MESA_SHADER_GEOMETRY),
      ENUM(MESA_SHADER_FRAGMENT),
      ENUM(MESA_SHADER_COMPUTE),
   };
   STATIC_ASSERT(ARRAY_SIZE(names) == MESA_SHADER_STAGES);
   return NAME(stage);
}

/**
 * Translate a gl_shader_stage to a short shader stage name for debug
 * printouts and error messages.
 */
const char * _mesa_shader_stage_to_string(unsigned stage)
{
   switch (stage) {
   case MESA_SHADER_VERTEX:   return "vertex";
   case MESA_SHADER_FRAGMENT: return "fragment";
   case MESA_SHADER_GEOMETRY: return "geometry";
   case MESA_SHADER_COMPUTE:  return "compute";
   case MESA_SHADER_TESS_CTRL: return "tess ctrl";
   case MESA_SHADER_TESS_EVAL: return "tess eval";
   }

   unreachable("Unknown shader stage.");
}

/**
 * Translate a gl_shader_stage to a shader stage abbreviation (VS, GS, FS)
 * for debug printouts and error messages.
 */
const char * _mesa_shader_stage_to_abbrev(unsigned stage)
{
   switch (stage) {
   case MESA_SHADER_VERTEX:   return "VS";
   case MESA_SHADER_FRAGMENT: return "FS";
   case MESA_SHADER_GEOMETRY: return "GS";
   case MESA_SHADER_COMPUTE:  return "CS";
   case MESA_SHADER_TESS_CTRL: return "TCS";
   case MESA_SHADER_TESS_EVAL: return "TES";
   }

   unreachable("Unknown shader stage.");
}

const char * gl_vert_attrib_name(gl_vert_attrib attrib)
{
   static const char *names[] = {
      ENUM(VERT_ATTRIB_POS),
      ENUM(VERT_ATTRIB_WEIGHT),
      ENUM(VERT_ATTRIB_NORMAL),
      ENUM(VERT_ATTRIB_COLOR0),
      ENUM(VERT_ATTRIB_COLOR1),
      ENUM(VERT_ATTRIB_FOG),
      ENUM(VERT_ATTRIB_COLOR_INDEX),
      ENUM(VERT_ATTRIB_EDGEFLAG),
      ENUM(VERT_ATTRIB_TEX0),
      ENUM(VERT_ATTRIB_TEX1),
      ENUM(VERT_ATTRIB_TEX2),
      ENUM(VERT_ATTRIB_TEX3),
      ENUM(VERT_ATTRIB_TEX4),
      ENUM(VERT_ATTRIB_TEX5),
      ENUM(VERT_ATTRIB_TEX6),
      ENUM(VERT_ATTRIB_TEX7),
      ENUM(VERT_ATTRIB_POINT_SIZE),
      ENUM(VERT_ATTRIB_GENERIC0),
      ENUM(VERT_ATTRIB_GENERIC1),
      ENUM(VERT_ATTRIB_GENERIC2),
      ENUM(VERT_ATTRIB_GENERIC3),
      ENUM(VERT_ATTRIB_GENERIC4),
      ENUM(VERT_ATTRIB_GENERIC5),
      ENUM(VERT_ATTRIB_GENERIC6),
      ENUM(VERT_ATTRIB_GENERIC7),
      ENUM(VERT_ATTRIB_GENERIC8),
      ENUM(VERT_ATTRIB_GENERIC9),
      ENUM(VERT_ATTRIB_GENERIC10),
      ENUM(VERT_ATTRIB_GENERIC11),
      ENUM(VERT_ATTRIB_GENERIC12),
      ENUM(VERT_ATTRIB_GENERIC13),
      ENUM(VERT_ATTRIB_GENERIC14),
      ENUM(VERT_ATTRIB_GENERIC15),
   };
   STATIC_ASSERT(ARRAY_SIZE(names) == VERT_ATTRIB_MAX);
   return NAME(attrib);
}

const char * gl_varying_slot_name(gl_varying_slot slot)
{
   static const char *names[] = {
      ENUM(VARYING_SLOT_POS),
      ENUM(VARYING_SLOT_COL0),
      ENUM(VARYING_SLOT_COL1),
      ENUM(VARYING_SLOT_FOGC),
      ENUM(VARYING_SLOT_TEX0),
      ENUM(VARYING_SLOT_TEX1),
      ENUM(VARYING_SLOT_TEX2),
      ENUM(VARYING_SLOT_TEX3),
      ENUM(VARYING_SLOT_TEX4),
      ENUM(VARYING_SLOT_TEX5),
      ENUM(VARYING_SLOT_TEX6),
      ENUM(VARYING_SLOT_TEX7),
      ENUM(VARYING_SLOT_PSIZ),
      ENUM(VARYING_SLOT_BFC0),
      ENUM(VARYING_SLOT_BFC1),
      ENUM(VARYING_SLOT_EDGE),
      ENUM(VARYING_SLOT_CLIP_VERTEX),
      ENUM(VARYING_SLOT_CLIP_DIST0),
      ENUM(VARYING_SLOT_CLIP_DIST1),
      ENUM(VARYING_SLOT_PRIMITIVE_ID),
      ENUM(VARYING_SLOT_LAYER),
      ENUM(VARYING_SLOT_VIEWPORT),
      ENUM(VARYING_SLOT_FACE),
      ENUM(VARYING_SLOT_PNTC),
      ENUM(VARYING_SLOT_TESS_LEVEL_OUTER),
      ENUM(VARYING_SLOT_TESS_LEVEL_INNER),
      ENUM(VARYING_SLOT_VAR0),
      ENUM(VARYING_SLOT_VAR1),
      ENUM(VARYING_SLOT_VAR2),
      ENUM(VARYING_SLOT_VAR3),
      ENUM(VARYING_SLOT_VAR4),
      ENUM(VARYING_SLOT_VAR5),
      ENUM(VARYING_SLOT_VAR6),
      ENUM(VARYING_SLOT_VAR7),
      ENUM(VARYING_SLOT_VAR8),
      ENUM(VARYING_SLOT_VAR9),
      ENUM(VARYING_SLOT_VAR10),
      ENUM(VARYING_SLOT_VAR11),
      ENUM(VARYING_SLOT_VAR12),
      ENUM(VARYING_SLOT_VAR13),
      ENUM(VARYING_SLOT_VAR14),
      ENUM(VARYING_SLOT_VAR15),
      ENUM(VARYING_SLOT_VAR16),
      ENUM(VARYING_SLOT_VAR17),
      ENUM(VARYING_SLOT_VAR18),
      ENUM(VARYING_SLOT_VAR19),
      ENUM(VARYING_SLOT_VAR20),
      ENUM(VARYING_SLOT_VAR21),
      ENUM(VARYING_SLOT_VAR22),
      ENUM(VARYING_SLOT_VAR23),
      ENUM(VARYING_SLOT_VAR24),
      ENUM(VARYING_SLOT_VAR25),
      ENUM(VARYING_SLOT_VAR26),
      ENUM(VARYING_SLOT_VAR27),
      ENUM(VARYING_SLOT_VAR28),
      ENUM(VARYING_SLOT_VAR29),
      ENUM(VARYING_SLOT_VAR30),
      ENUM(VARYING_SLOT_VAR31),
   };
   STATIC_ASSERT(ARRAY_SIZE(names) == VARYING_SLOT_MAX);
   return NAME(slot);
}

const char * gl_system_value_name(gl_system_value sysval)
{
   static const char *names[] = {
     ENUM(SYSTEM_VALUE_VERTEX_ID),
     ENUM(SYSTEM_VALUE_INSTANCE_ID),
     ENUM(SYSTEM_VALUE_VERTEX_ID_ZERO_BASE),
     ENUM(SYSTEM_VALUE_BASE_VERTEX),
     ENUM(SYSTEM_VALUE_INVOCATION_ID),
     ENUM(SYSTEM_VALUE_FRONT_FACE),
     ENUM(SYSTEM_VALUE_SAMPLE_ID),
     ENUM(SYSTEM_VALUE_SAMPLE_POS),
     ENUM(SYSTEM_VALUE_SAMPLE_MASK_IN),
     ENUM(SYSTEM_VALUE_TESS_COORD),
     ENUM(SYSTEM_VALUE_VERTICES_IN),
     ENUM(SYSTEM_VALUE_PRIMITIVE_ID),
     ENUM(SYSTEM_VALUE_TESS_LEVEL_OUTER),
     ENUM(SYSTEM_VALUE_TESS_LEVEL_INNER),
     ENUM(SYSTEM_VALUE_LOCAL_INVOCATION_ID),
     ENUM(SYSTEM_VALUE_LOCAL_INVOCATION_INDEX),
     ENUM(SYSTEM_VALUE_GLOBAL_INVOCATION_ID),
     ENUM(SYSTEM_VALUE_WORK_GROUP_ID),
     ENUM(SYSTEM_VALUE_NUM_WORK_GROUPS),
     ENUM(SYSTEM_VALUE_VERTEX_CNT),
   };
   STATIC_ASSERT(ARRAY_SIZE(names) == SYSTEM_VALUE_MAX);
   return NAME(sysval);
}

const char * glsl_interp_qualifier_name(enum glsl_interp_qualifier qual)
{
   static const char *names[] = {
      ENUM(INTERP_QUALIFIER_NONE),
      ENUM(INTERP_QUALIFIER_SMOOTH),
      ENUM(INTERP_QUALIFIER_FLAT),
      ENUM(INTERP_QUALIFIER_NOPERSPECTIVE),
   };
   STATIC_ASSERT(ARRAY_SIZE(names) == INTERP_QUALIFIER_COUNT);
   return NAME(qual);
}

const char * gl_frag_result_name(gl_frag_result result)
{
   static const char *names[] = {
      ENUM(FRAG_RESULT_DEPTH),
      ENUM(FRAG_RESULT_STENCIL),
      ENUM(FRAG_RESULT_COLOR),
      ENUM(FRAG_RESULT_SAMPLE_MASK),
      ENUM(FRAG_RESULT_DATA0),
      ENUM(FRAG_RESULT_DATA1),
      ENUM(FRAG_RESULT_DATA2),
      ENUM(FRAG_RESULT_DATA3),
      ENUM(FRAG_RESULT_DATA4),
      ENUM(FRAG_RESULT_DATA5),
      ENUM(FRAG_RESULT_DATA6),
      ENUM(FRAG_RESULT_DATA7),
   };
   STATIC_ASSERT(ARRAY_SIZE(names) == FRAG_RESULT_MAX);
   return NAME(result);
}