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

 *

 * Copyright 2007 VMware, Inc.

 * All Rights Reserved.

 * Copyright 2008 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.

 *

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

/* Author:

 *    Keith Whitwell 

 */

#include "draw/draw_context.h"

#include "draw/draw_vbuf.h"

#include "pipe/p_defines.h"

#include "util/u_inlines.h"

#include "util/u_math.h"

#include "util/u_memory.h"

#include "util/simple_list.h"

#include "lp_clear.h"

#include "lp_context.h"

#include "lp_flush.h"

#include "lp_perf.h"

#include "lp_state.h"

#include "lp_surface.h"

#include "lp_query.h"

#include "lp_setup.h"

/* This is only safe if there's just one concurrent context */

#ifdef PIPE_SUBSYSTEM_EMBEDDED

#define USE_GLOBAL_LLVM_CONTEXT

#endif

static void llvmpipe_destroy( struct pipe_context *pipe )

{

   struct llvmpipe_context *llvmpipe = llvmpipe_context( pipe );

   uint i, j;

   lp_print_counters();

   if (llvmpipe->blitter) {

      util_blitter_destroy(llvmpipe->blitter);

   }

   /* This will also destroy llvmpipe->setup:

    */

   if (llvmpipe->draw)

      draw_destroy( llvmpipe->draw );

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

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

   }

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

   for (i = 0; i < Elements(llvmpipe->sampler_views[0]); i++) {

      pipe_sampler_view_reference(&llvmpipe->sampler_views[PIPE_SHADER_FRAGMENT][i], NULL);

   }

   for (i = 0; i < Elements(llvmpipe->sampler_views[0]); i++) {

      pipe_sampler_view_reference(&llvmpipe->sampler_views[PIPE_SHADER_VERTEX][i], NULL);

   }

   for (i = 0; i < Elements(llvmpipe->sampler_views[0]); i++) {

      pipe_sampler_view_reference(&llvmpipe->sampler_views[PIPE_SHADER_GEOMETRY][i], NULL);

   }

   for (i = 0; i < Elements(llvmpipe->constants); i++) {

      for (j = 0; j < Elements(llvmpipe->constants[i]); j++) {

         pipe_resource_reference(&llvmpipe->constants[i][j].buffer, NULL);

      }

   }

   for (i = 0; i < llvmpipe->num_vertex_buffers; i++) {

      pipe_resource_reference(&llvmpipe->vertex_buffer[i].buffer, NULL);

   }

   lp_delete_setup_variants(llvmpipe);

#ifndef USE_GLOBAL_LLVM_CONTEXT

   LLVMContextDispose(llvmpipe->context);

#endif

   llvmpipe->context = NULL;

   align_free( llvmpipe );

}

static void

do_flush( struct pipe_context *pipe,

          struct pipe_fence_handle **fence,

          unsigned flags)

{

   llvmpipe_flush(pipe, fence, __FUNCTION__);

}

static void

llvmpipe_render_condition ( struct pipe_context *pipe,

                            struct pipe_query *query,

                            boolean condition,

                            uint mode )

{

   struct llvmpipe_context *llvmpipe = llvmpipe_context( pipe );

   llvmpipe->render_cond_query = query;

   llvmpipe->render_cond_mode = mode;

   llvmpipe->render_cond_cond = condition;

}

struct pipe_context *

llvmpipe_create_context( struct pipe_screen *screen, void *priv )

{

   struct llvmpipe_context *llvmpipe;

   llvmpipe = align_malloc(sizeof(struct llvmpipe_context), 16);

   if (!llvmpipe)

      return NULL;

   util_init_math();

   memset(llvmpipe, 0, sizeof *llvmpipe);

   make_empty_list(&llvmpipe->fs_variants_list);

   make_empty_list(&llvmpipe->setup_variants_list);

   llvmpipe->pipe.screen = screen;

   llvmpipe->pipe.priv = priv;

   /* Init the pipe context methods */

   llvmpipe->pipe.destroy = llvmpipe_destroy;

   llvmpipe->pipe.set_framebuffer_state = llvmpipe_set_framebuffer_state;

   llvmpipe->pipe.clear = llvmpipe_clear;

   llvmpipe->pipe.flush = do_flush;

   llvmpipe->pipe.render_condition = llvmpipe_render_condition;

   llvmpipe_init_blend_funcs(llvmpipe);

   llvmpipe_init_clip_funcs(llvmpipe);

   llvmpipe_init_draw_funcs(llvmpipe);

   llvmpipe_init_sampler_funcs(llvmpipe);

   llvmpipe_init_query_funcs( llvmpipe );

   llvmpipe_init_vertex_funcs(llvmpipe);

   llvmpipe_init_so_funcs(llvmpipe);

   llvmpipe_init_fs_funcs(llvmpipe);

   llvmpipe_init_vs_funcs(llvmpipe);

   llvmpipe_init_gs_funcs(llvmpipe);

   llvmpipe_init_rasterizer_funcs(llvmpipe);

   llvmpipe_init_context_resource_funcs( &llvmpipe->pipe );

   llvmpipe_init_surface_functions(llvmpipe);

#ifdef USE_GLOBAL_LLVM_CONTEXT

   llvmpipe->context = LLVMGetGlobalContext();

#else

   llvmpipe->context = LLVMContextCreate();

#endif

   if (!llvmpipe->context)

      goto fail;

   /*

    * Create drawing context and plug our rendering stage into it.

    */

   llvmpipe->draw = draw_create_with_llvm_context(&llvmpipe->pipe,

                                                  llvmpipe->context);

   if (!llvmpipe->draw)

      goto fail;

   /* FIXME: devise alternative to draw_texture_samplers */

   llvmpipe->setup = lp_setup_create( &llvmpipe->pipe,

                                      llvmpipe->draw );

   if (!llvmpipe->setup)

      goto fail;

   llvmpipe->blitter = util_blitter_create(&llvmpipe->pipe);

   if (!llvmpipe->blitter) {

      goto fail;

   }

   /* must be done before installing Draw stages */

   util_blitter_cache_all_shaders(llvmpipe->blitter);

   /* plug in AA line/point stages */

   draw_install_aaline_stage(llvmpipe->draw, &llvmpipe->pipe);

   draw_install_aapoint_stage(llvmpipe->draw, &llvmpipe->pipe);

   draw_install_pstipple_stage(llvmpipe->draw, &llvmpipe->pipe);

   /* convert points and lines into triangles:

    * (otherwise, draw points and lines natively)

    */

   draw_wide_point_sprites(llvmpipe->draw, FALSE);

   draw_enable_point_sprites(llvmpipe->draw, FALSE);

   draw_wide_point_threshold(llvmpipe->draw, 10000.0);

   draw_wide_line_threshold(llvmpipe->draw, 10000.0);

   lp_reset_counters();

   return &llvmpipe->pipe;

 fail:

   llvmpipe_destroy(&llvmpipe->pipe);

   return NULL;

}