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

 *

 * Copyright 2009 VMware, Inc.

 * 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.

 *

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

/**

 * @author Jose Fonseca 

 * @author Keith Whitwell 

 */

#include "util/u_memory.h"

#include "util/u_math.h"

#include "util/u_dump.h"

#include "draw/draw_context.h"

#include "lp_screen.h"

#include "lp_context.h"

#include "lp_state.h"

#include "lp_debug.h"

static void *

llvmpipe_create_blend_state(struct pipe_context *pipe,

                            const struct pipe_blend_state *blend)

{

   struct pipe_blend_state *state = mem_dup(blend, sizeof *blend);

   int i;

   if (LP_PERF & PERF_NO_BLEND) {

      state->independent_blend_enable = 0;

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

	 state->rt[i].blend_enable = 0;

   }

   return state;

}

static void

llvmpipe_bind_blend_state(struct pipe_context *pipe, void *blend)

{

   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);

   if (llvmpipe->blend == blend)

      return;

   draw_flush(llvmpipe->draw);

   llvmpipe->blend = blend;

   llvmpipe->dirty |= LP_NEW_BLEND;

}

static void

llvmpipe_delete_blend_state(struct pipe_context *pipe, void *blend)

{

   FREE( blend );

}

static void

llvmpipe_set_blend_color(struct pipe_context *pipe,

                         const struct pipe_blend_color *blend_color)

{

   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);

   if(!blend_color)

      return;

   if(memcmp(&llvmpipe->blend_color, blend_color, sizeof *blend_color) == 0)

      return;

   draw_flush(llvmpipe->draw);

   memcpy(&llvmpipe->blend_color, blend_color, sizeof *blend_color);

   llvmpipe->dirty |= LP_NEW_BLEND_COLOR;

}

/** XXX move someday?  Or consolidate all these simple state setters

 * into one file.

 */

static void *

llvmpipe_create_depth_stencil_state(struct pipe_context *pipe,

				    const struct pipe_depth_stencil_alpha_state *depth_stencil)

{

   struct pipe_depth_stencil_alpha_state *state;

   state = mem_dup(depth_stencil, sizeof *depth_stencil);

   if (LP_PERF & PERF_NO_DEPTH) {

      state->depth.enabled = 0;

      state->depth.writemask = 0;

      state->stencil[0].enabled = 0;

      state->stencil[1].enabled = 0;

   }

   if (LP_PERF & PERF_NO_ALPHATEST) {

      state->alpha.enabled = 0;

   }

   return state;

}

static void

llvmpipe_bind_depth_stencil_state(struct pipe_context *pipe,

                                  void *depth_stencil)

{

   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);

   if (llvmpipe->depth_stencil == depth_stencil)

      return;

   draw_flush(llvmpipe->draw);

   llvmpipe->depth_stencil = depth_stencil;

   llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;

}

static void

llvmpipe_delete_depth_stencil_state(struct pipe_context *pipe, void *depth)

{

   FREE( depth );

}

static void

llvmpipe_set_stencil_ref(struct pipe_context *pipe,

                         const struct pipe_stencil_ref *stencil_ref)

{

   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);

   if(!stencil_ref)

      return;

   if(memcmp(&llvmpipe->stencil_ref, stencil_ref, sizeof *stencil_ref) == 0)

      return;

   draw_flush(llvmpipe->draw);

   memcpy(&llvmpipe->stencil_ref, stencil_ref, sizeof *stencil_ref);

   /* not sure. want new flag? */

   llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;

}

static void

llvmpipe_set_sample_mask(struct pipe_context *pipe,

                         unsigned sample_mask)

{

}

void

llvmpipe_init_blend_funcs(struct llvmpipe_context *llvmpipe)

{

   llvmpipe->pipe.create_blend_state = llvmpipe_create_blend_state;

   llvmpipe->pipe.bind_blend_state   = llvmpipe_bind_blend_state;

   llvmpipe->pipe.delete_blend_state = llvmpipe_delete_blend_state;

   llvmpipe->pipe.create_depth_stencil_alpha_state = llvmpipe_create_depth_stencil_state;

   llvmpipe->pipe.bind_depth_stencil_alpha_state   = llvmpipe_bind_depth_stencil_state;

   llvmpipe->pipe.delete_depth_stencil_alpha_state = llvmpipe_delete_depth_stencil_state;

   llvmpipe->pipe.set_blend_color = llvmpipe_set_blend_color;

   llvmpipe->pipe.set_stencil_ref = llvmpipe_set_stencil_ref;

   llvmpipe->pipe.set_sample_mask = llvmpipe_set_sample_mask;

}