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

 * Copyright 2008-2009 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, 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 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.

 *

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

#include "svga_cmd.h"

#include "util/u_inlines.h"

#include "svga_context.h"

#include "svga_surface.h"

static void svga_set_scissor_states( struct pipe_context *pipe,

                                     unsigned start_slot,

                                     unsigned num_scissors,

                                     const struct pipe_scissor_state *scissors )

{

   struct svga_context *svga = svga_context(pipe);

   memcpy( &svga->curr.scissor, scissors, sizeof(*scissors) );

   svga->dirty |= SVGA_NEW_SCISSOR;

}

static void svga_set_polygon_stipple( struct pipe_context *pipe,

                                      const struct pipe_poly_stipple *stipple )

{

   /* overridden by the draw module */

}

void svga_cleanup_framebuffer(struct svga_context *svga)

{

   struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;

   struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;

   int i;

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

      pipe_surface_reference(&curr->cbufs[i], NULL);

      pipe_surface_reference(&hw->cbufs[i], NULL);

   }

   pipe_surface_reference(&curr->zsbuf, NULL);

   pipe_surface_reference(&hw->zsbuf, NULL);

}

#define DEPTH_BIAS_SCALE_FACTOR_D16    ((float)(1<<15))

#define DEPTH_BIAS_SCALE_FACTOR_D24S8  ((float)(1<<23))

#define DEPTH_BIAS_SCALE_FACTOR_D32    ((float)(1<<31))

static void svga_set_framebuffer_state(struct pipe_context *pipe,

				       const struct pipe_framebuffer_state *fb)

{

   struct svga_context *svga = svga_context(pipe);

   struct pipe_framebuffer_state *dst = &svga->curr.framebuffer;

   boolean propagate = FALSE;

   unsigned i;

   dst->width = fb->width;

   dst->height = fb->height;

   dst->nr_cbufs = fb->nr_cbufs;

   /* check if we need to propagate any of the target surfaces */

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

      if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])

         if (svga_surface_needs_propagation(dst->cbufs[i]))

            propagate = TRUE;

   }

   if (propagate) {

      /* make sure that drawing calls comes before propagation calls */

      svga_hwtnl_flush_retry( svga );

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

         if (dst->cbufs[i] && dst->cbufs[i] != fb->cbufs[i])

            svga_propagate_surface(svga, dst->cbufs[i]);

   }

   /* XXX: Actually the virtual hardware may support rendertargets with

    * different size, depending on the host API and driver, but since we cannot

    * know that make no such assumption here. */

   for(i = 0; i < fb->nr_cbufs; ++i) {

      if (fb->zsbuf && fb->cbufs[i]) {

         assert(fb->zsbuf->width == fb->cbufs[i]->width);

         assert(fb->zsbuf->height == fb->cbufs[i]->height);

      }

   }

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

      pipe_surface_reference(&dst->cbufs[i],

                             (i < fb->nr_cbufs) ? fb->cbufs[i] : NULL);

   }

   pipe_surface_reference(&dst->zsbuf, fb->zsbuf);

   if (svga->curr.framebuffer.zsbuf)

   {

      switch (svga->curr.framebuffer.zsbuf->format) {

      case PIPE_FORMAT_Z16_UNORM:

         svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D16;

         break;

      case PIPE_FORMAT_Z24_UNORM_S8_UINT:

      case PIPE_FORMAT_Z24X8_UNORM:

      case PIPE_FORMAT_S8_UINT_Z24_UNORM:

      case PIPE_FORMAT_X8Z24_UNORM:

         svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D24S8;

         break;

      case PIPE_FORMAT_Z32_UNORM:

         svga->curr.depthscale = 1.0f / DEPTH_BIAS_SCALE_FACTOR_D32;

         break;

      case PIPE_FORMAT_Z32_FLOAT:

         svga->curr.depthscale = 1.0f / ((float)(1<<23));

         break;

      default:

         svga->curr.depthscale = 0.0f;

         break;

      }

   }

   else {

      svga->curr.depthscale = 0.0f;

   }

   svga->dirty |= SVGA_NEW_FRAME_BUFFER;

}

static void svga_set_clip_state( struct pipe_context *pipe,

                                 const struct pipe_clip_state *clip )

{

   struct svga_context *svga = svga_context(pipe);

   svga->curr.clip = *clip; /* struct copy */

   svga->dirty |= SVGA_NEW_CLIP;

}

/* Called when driver state tracker notices changes to the viewport

 * matrix:

 */

static void svga_set_viewport_states( struct pipe_context *pipe,

                                      unsigned start_slot,

                                      unsigned num_viewports,

                                      const struct pipe_viewport_state *viewports )

{

   struct svga_context *svga = svga_context(pipe);

   svga->curr.viewport = *viewports; /* struct copy */

   svga->dirty |= SVGA_NEW_VIEWPORT;

}

void svga_init_misc_functions( struct svga_context *svga )

{

   svga->pipe.set_scissor_states = svga_set_scissor_states;

   svga->pipe.set_polygon_stipple = svga_set_polygon_stipple;

   svga->pipe.set_framebuffer_state = svga_set_framebuffer_state;

   svga->pipe.set_clip_state = svga_set_clip_state;

   svga->pipe.set_viewport_states = svga_set_viewport_states;

}