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/**************************************************************************

 *

 * Copyright 2003 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 

  */

#include "main/glheader.h"

#include "main/macros.h"

#include "main/enums.h"

#include "main/shaderapi.h"

#include "program/prog_instruction.h"

#include "program/program.h"

#include "cso_cache/cso_context.h"

#include "draw/draw_context.h"

#include "st_context.h"

#include "st_debug.h"

#include "st_program.h"

#include "st_mesa_to_tgsi.h"

#include "st_cb_program.h"

#include "st_glsl_to_tgsi.h"

/**

 * Called via ctx->Driver.BindProgram() to bind an ARB vertex or

 * fragment program.

 */

static void

st_bind_program(struct gl_context *ctx, GLenum target, struct gl_program *prog)

{

   struct st_context *st = st_context(ctx);

   switch (target) {

   case GL_VERTEX_PROGRAM_ARB:

      st->dirty.st |= ST_NEW_VERTEX_PROGRAM;

      break;

   case GL_FRAGMENT_PROGRAM_ARB:

      st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;

      break;

   case MESA_GEOMETRY_PROGRAM:

      st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;

      break;

   }

}

/**

 * Called via ctx->Driver.UseProgram() to bind a linked GLSL program

 * (vertex shader + fragment shader).

 */

static void

st_use_program(struct gl_context *ctx, struct gl_shader_program *shProg)

{

   struct st_context *st = st_context(ctx);

   st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;

   st->dirty.st |= ST_NEW_VERTEX_PROGRAM;

   st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;

}

/**

 * Called via ctx->Driver.NewProgram() to allocate a new vertex or

 * fragment program.

 */

static struct gl_program *

st_new_program(struct gl_context *ctx, GLenum target, GLuint id)

{

   switch (target) {

   case GL_VERTEX_PROGRAM_ARB: {

      struct st_vertex_program *prog = ST_CALLOC_STRUCT(st_vertex_program);

      return _mesa_init_vertex_program(ctx, &prog->Base, target, id);

   }

   case GL_FRAGMENT_PROGRAM_ARB: {

      struct st_fragment_program *prog = ST_CALLOC_STRUCT(st_fragment_program);

      return _mesa_init_fragment_program(ctx, &prog->Base, target, id);

   }

   case MESA_GEOMETRY_PROGRAM: {

      struct st_geometry_program *prog = ST_CALLOC_STRUCT(st_geometry_program);

      return _mesa_init_geometry_program(ctx, &prog->Base, target, id);

   }

   default:

      assert(0);

      return NULL;

   }

}

/**

 * Called via ctx->Driver.DeleteProgram()

 */

static void

st_delete_program(struct gl_context *ctx, struct gl_program *prog)

{

   struct st_context *st = st_context(ctx);

   switch( prog->Target ) {

   case GL_VERTEX_PROGRAM_ARB:

      {

         struct st_vertex_program *stvp = (struct st_vertex_program *) prog;

         st_release_vp_variants( st, stvp );

         if (stvp->glsl_to_tgsi)

            free_glsl_to_tgsi_visitor(stvp->glsl_to_tgsi);

      }

      break;

   case MESA_GEOMETRY_PROGRAM:

      {

         struct st_geometry_program *stgp =

            (struct st_geometry_program *) prog;

         st_release_gp_variants(st, stgp);

         if (stgp->glsl_to_tgsi)

            free_glsl_to_tgsi_visitor(stgp->glsl_to_tgsi);

      }

      break;

   case GL_FRAGMENT_PROGRAM_ARB:

      {

         struct st_fragment_program *stfp =

            (struct st_fragment_program *) prog;

         st_release_fp_variants(st, stfp);

         if (stfp->glsl_to_tgsi)

            free_glsl_to_tgsi_visitor(stfp->glsl_to_tgsi);

      }

      break;

   default:

      assert(0); /* problem */

   }

   /* delete base class */

   _mesa_delete_program( ctx, prog );

}

/**

 * Called via ctx->Driver.IsProgramNative()

 */

static GLboolean

st_is_program_native(struct gl_context *ctx,

                     GLenum target,

                     struct gl_program *prog)

{

   return GL_TRUE;

}

/**

 * Called via ctx->Driver.ProgramStringNotify()

 * Called when the program's text/code is changed.  We have to free

 * all shader variants and corresponding gallium shaders when this happens.

 */

static GLboolean

st_program_string_notify( struct gl_context *ctx,

                                           GLenum target,

                                           struct gl_program *prog )

{

   struct st_context *st = st_context(ctx);

   if (target == GL_FRAGMENT_PROGRAM_ARB) {

      struct st_fragment_program *stfp = (struct st_fragment_program *) prog;

      st_release_fp_variants(st, stfp);

      if (st->fp == stfp)

	 st->dirty.st |= ST_NEW_FRAGMENT_PROGRAM;

   }

   else if (target == MESA_GEOMETRY_PROGRAM) {

      struct st_geometry_program *stgp = (struct st_geometry_program *) prog;

      st_release_gp_variants(st, stgp);

      if (st->gp == stgp)

	 st->dirty.st |= ST_NEW_GEOMETRY_PROGRAM;

   }

   else if (target == GL_VERTEX_PROGRAM_ARB) {

      struct st_vertex_program *stvp = (struct st_vertex_program *) prog;

      st_release_vp_variants( st, stvp );

      if (st->vp == stvp)

	 st->dirty.st |= ST_NEW_VERTEX_PROGRAM;

   }

   if (ST_DEBUG & DEBUG_PRECOMPILE)

      st_precompile_shader_variant(st, prog);

   /* XXX check if program is legal, within limits */

   return GL_TRUE;

}

/**

 * Plug in the program and shader-related device driver functions.

 */

void

st_init_program_functions(struct dd_function_table *functions)

{

   functions->BindProgram = st_bind_program;

   functions->UseProgram = st_use_program;

   functions->NewProgram = st_new_program;

   functions->DeleteProgram = st_delete_program;

   functions->IsProgramNative = st_is_program_native;

   functions->ProgramStringNotify = st_program_string_notify;

   functions->LinkShader = st_link_shader;

}