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

 *

 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

 * 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 TUNGSTEN GRAPHICS 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.

 *

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

#include "main/imports.h"

#include "main/context.h"

#include "main/shaderobj.h"

#include "program/prog_cache.h"

#include "vbo/vbo.h"

#include "glapi/glapi.h"

#include "st_context.h"

#include "st_debug.h"

#include "st_cb_accum.h"

#include "st_cb_bitmap.h"

#include "st_cb_blit.h"

#include "st_cb_bufferobjects.h"

#include "st_cb_clear.h"

#include "st_cb_condrender.h"

#include "st_cb_drawpixels.h"

#include "st_cb_rasterpos.h"

#include "st_cb_drawtex.h"

#include "st_cb_eglimage.h"

#include "st_cb_fbo.h"

#include "st_cb_feedback.h"

#include "st_cb_program.h"

#include "st_cb_queryobj.h"

#include "st_cb_readpixels.h"

#include "st_cb_texture.h"

#include "st_cb_xformfb.h"

#include "st_cb_flush.h"

#include "st_cb_strings.h"

#include "st_cb_viewport.h"

#include "st_atom.h"

#include "st_draw.h"

#include "st_extensions.h"

#include "st_gen_mipmap.h"

#include "st_program.h"

#include "pipe/p_context.h"

#include "util/u_inlines.h"

#include "cso_cache/cso_context.h"

DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)

/**

 * Called via ctx->Driver.UpdateState()

 */

void st_invalidate_state(struct gl_context * ctx, GLuint new_state)

{

   struct st_context *st = st_context(ctx);

   st->dirty.mesa |= new_state;

   st->dirty.st |= ST_NEW_MESA;

   /* This is the only core Mesa module we depend upon.

    * No longer use swrast, swsetup, tnl.

    */

   _vbo_InvalidateState(ctx, new_state);

}

/**

 * Check for multisample env var override.

 */

int

st_get_msaa(void)

{

   const char *msaa = _mesa_getenv("__GL_FSAA_MODE");

   if (msaa)

      return atoi(msaa);

   return 0;

}

static struct st_context *

st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe )

{

   uint i;

   struct st_context *st = ST_CALLOC_STRUCT( st_context );

   ctx->st = st;

   st->ctx = ctx;

   st->pipe = pipe;

   /* XXX: this is one-off, per-screen init: */

   st_debug_init();

   /* state tracker needs the VBO module */

   _vbo_CreateContext(ctx);

   st->dirty.mesa = ~0;

   st->dirty.st = ~0;

   st->cso_context = cso_create_context(pipe);

   st_init_atoms( st );

   st_init_bitmap(st);

   st_init_clear(st);

   st_init_draw( st );

   st_init_generate_mipmap(st);

   st_init_blit(st);

   if(pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))

      st->internal_target = PIPE_TEXTURE_2D;

   else

      st->internal_target = PIPE_TEXTURE_RECT;

   for (i = 0; i < PIPE_MAX_SAMPLERS; i++)

      st->state.sampler_list[i] = &st->state.samplers[i];

   for (i = 0; i < 3; i++) {

      memset(&st->velems_util_draw[i], 0, sizeof(struct pipe_vertex_element));

      st->velems_util_draw[i].src_offset = i * 4 * sizeof(float);

      st->velems_util_draw[i].instance_divisor = 0;

      st->velems_util_draw[i].vertex_buffer_index = 0;

      st->velems_util_draw[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;

   }

   /* we want all vertex data to be placed in buffer objects */

   vbo_use_buffer_objects(ctx);

   /* Need these flags:

    */

   st->ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;

   st->ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;

   st->pixel_xfer.cache = _mesa_new_program_cache();

   st->force_msaa = st_get_msaa();

   /* GL limits and extensions */

   st_init_limits(st);

   st_init_extensions(st);

   return st;

}

struct st_context *st_create_context(gl_api api, struct pipe_context *pipe,

                                     const struct gl_config *visual,

                                     struct st_context *share)

{

   struct gl_context *ctx;

   struct gl_context *shareCtx = share ? share->ctx : NULL;

   struct dd_function_table funcs;

   /* Sanity checks */

   assert(MESA_SHADER_VERTEX == PIPE_SHADER_VERTEX);

   assert(MESA_SHADER_FRAGMENT == PIPE_SHADER_FRAGMENT);

   assert(MESA_SHADER_GEOMETRY == PIPE_SHADER_GEOMETRY);

   memset(&funcs, 0, sizeof(funcs));

   st_init_driver_functions(&funcs);

   ctx = _mesa_create_context_for_api(api, visual, shareCtx, &funcs, NULL);

   /* XXX: need a capability bit in gallium to query if the pipe

    * driver prefers DP4 or MUL/MAD for vertex transformation.

    */

   if (debug_get_option_mesa_mvp_dp4())

      _mesa_set_mvp_with_dp4( ctx, GL_TRUE );

   return st_create_context_priv(ctx, pipe);

}

static void st_destroy_context_priv( struct st_context *st )

{

   uint i;

   st_destroy_atoms( st );

   st_destroy_draw( st );

   st_destroy_generate_mipmap(st);

   st_destroy_blit(st);

   st_destroy_clear(st);

   st_destroy_bitmap(st);

   st_destroy_drawpix(st);

   st_destroy_drawtex(st);

   for (i = 0; i < Elements(st->state.sampler_views); i++) {

      pipe_sampler_view_reference(&st->state.sampler_views[i], NULL);

   }

   for (i = 0; i < Elements(st->state.constants); i++) {

      if (st->state.constants[i]) {

         pipe_resource_reference(&st->state.constants[i], NULL);

      }

   }

   if (st->default_texture) {

      st->ctx->Driver.DeleteTexture(st->ctx, st->default_texture);

      st->default_texture = NULL;

   }

   free( st );

}

void st_destroy_context( struct st_context *st )

{

   struct pipe_context *pipe = st->pipe;

   struct cso_context *cso = st->cso_context;

   struct gl_context *ctx = st->ctx;

   GLuint i;

   /* need to unbind and destroy CSO objects before anything else */

   cso_release_all(st->cso_context);

   st_reference_fragprog(st, &st->fp, NULL);

   st_reference_vertprog(st, &st->vp, NULL);

   /* release framebuffer surfaces */

   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {

      pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);

   }

   pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);

   pipe->set_index_buffer(pipe, NULL);

   for (i = 0; i < PIPE_SHADER_TYPES; i++) {

      pipe->set_constant_buffer(pipe, i, 0, NULL);

      pipe_resource_reference(&st->state.constants[i], NULL);

   }

   _mesa_delete_program_cache(st->ctx, st->pixel_xfer.cache);

   _vbo_DestroyContext(st->ctx);

   _mesa_free_context_data(ctx);

   st_destroy_context_priv(st);

   cso_destroy_context(cso);

   pipe->destroy( pipe );

   free(ctx);

}

void st_init_driver_functions(struct dd_function_table *functions)

{

   _mesa_init_shader_object_functions(functions);

   st_init_accum_functions(functions);

   st_init_blit_functions(functions);

   st_init_bufferobject_functions(functions);

   st_init_clear_functions(functions);

   st_init_bitmap_functions(functions);

   st_init_drawpixels_functions(functions);

   st_init_rasterpos_functions(functions);

   st_init_drawtex_functions(functions);

   st_init_eglimage_functions(functions);

   st_init_fbo_functions(functions);

   st_init_feedback_functions(functions);

   st_init_program_functions(functions);

   st_init_query_functions(functions);

   st_init_cond_render_functions(functions);

   st_init_readpixels_functions(functions);

   st_init_texture_functions(functions);

   st_init_flush_functions(functions);

   st_init_string_functions(functions);

   st_init_viewport_functions(functions);

   st_init_xformfb_functions(functions);

   functions->UpdateState = st_invalidate_state;

}