src/gallium/drivers/rbug/rbug_context.c

/**************************************************************************
 *
 * Copyright 2010 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.
 *
 **************************************************************************/


#include "pipe/p_context.h"
#include "util/u_memory.h"
#include "util/u_inlines.h"
#include "util/u_simple_list.h"

#include "rbug/rbug_context.h"

#include "rbug_context.h"
#include "rbug_objects.h"


static void
rbug_destroy(struct pipe_context *_pipe)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   remove_from_list(&rb_pipe->list);
   pipe->destroy(pipe);

   FREE(rb_pipe);
}

static void
rbug_draw_block_locked(struct rbug_context *rb_pipe, int flag)
{

   if (rb_pipe->draw_blocker & flag) {
      rb_pipe->draw_blocked |= flag;
   } else if ((rb_pipe->draw_rule.blocker & flag) &&
              (rb_pipe->draw_blocker & RBUG_BLOCK_RULE)) {
      int k;
      boolean block = FALSE;
      debug_printf("%s (%p %p) (%p %p) (%p %u) (%p %u)\n", __FUNCTION__,
                   (void *) rb_pipe->draw_rule.fs, (void *) rb_pipe->curr.fs,
                   (void *) rb_pipe->draw_rule.vs, (void *) rb_pipe->curr.vs,
                   (void *) rb_pipe->draw_rule.surf, 0,
                   (void *) rb_pipe->draw_rule.texture, 0);
      if (rb_pipe->draw_rule.fs &&
          rb_pipe->draw_rule.fs == rb_pipe->curr.fs)
         block = TRUE;
      if (rb_pipe->draw_rule.vs &&
          rb_pipe->draw_rule.vs == rb_pipe->curr.vs)
         block = TRUE;
      if (rb_pipe->draw_rule.surf &&
          rb_pipe->draw_rule.surf == rb_pipe->curr.zsbuf)
            block = TRUE;
      if (rb_pipe->draw_rule.surf)
         for (k = 0; k < rb_pipe->curr.nr_cbufs; k++)
            if (rb_pipe->draw_rule.surf == rb_pipe->curr.cbufs[k])
               block = TRUE;
      if (rb_pipe->draw_rule.texture) {
         for (k = 0; k < rb_pipe->curr.num_fs_views; k++)
            if (rb_pipe->draw_rule.texture == rb_pipe->curr.fs_texs[k])
               block = TRUE;
         for (k = 0; k < rb_pipe->curr.num_vs_views; k++) {
            if (rb_pipe->draw_rule.texture == rb_pipe->curr.vs_texs[k]) {
               block = TRUE;
            }
         }
      }

      if (block)
         rb_pipe->draw_blocked |= (flag | RBUG_BLOCK_RULE);
   }

   if (rb_pipe->draw_blocked)
      rbug_notify_draw_blocked(rb_pipe);

   /* wait for rbug to clear the blocked flag */
   while (rb_pipe->draw_blocked & flag) {
      rb_pipe->draw_blocked |= flag;
      pipe_condvar_wait(rb_pipe->draw_cond, rb_pipe->draw_mutex);
   }

}

static void
rbug_draw_vbo(struct pipe_context *_pipe, const struct pipe_draw_info *info)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe_mutex_lock(rb_pipe->draw_mutex);
   rbug_draw_block_locked(rb_pipe, RBUG_BLOCK_BEFORE);

   pipe->draw_vbo(pipe, info);

   rbug_draw_block_locked(rb_pipe, RBUG_BLOCK_AFTER);
   pipe_mutex_unlock(rb_pipe->draw_mutex);
}

static struct pipe_query *
rbug_create_query(struct pipe_context *_pipe,
                  unsigned query_type)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   return pipe->create_query(pipe,
                             query_type);
}

static void
rbug_destroy_query(struct pipe_context *_pipe,
                   struct pipe_query *query)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->destroy_query(pipe,
                       query);
}

static void
rbug_begin_query(struct pipe_context *_pipe,
                 struct pipe_query *query)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->begin_query(pipe,
                     query);
}

static void
rbug_end_query(struct pipe_context *_pipe,
               struct pipe_query *query)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->end_query(pipe,
                   query);
}

static boolean
rbug_get_query_result(struct pipe_context *_pipe,
                      struct pipe_query *query,
                      boolean wait,
                      void *result)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   return pipe->get_query_result(pipe,
                                 query,
                                 wait,
                                 result);
}

static void *
rbug_create_blend_state(struct pipe_context *_pipe,
                        const struct pipe_blend_state *blend)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   return pipe->create_blend_state(pipe,
                                   blend);
}

static void
rbug_bind_blend_state(struct pipe_context *_pipe,
                      void *blend)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->bind_blend_state(pipe,
                              blend);
}

static void
rbug_delete_blend_state(struct pipe_context *_pipe,
                        void *blend)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->delete_blend_state(pipe,
                            blend);
}

static void *
rbug_create_sampler_state(struct pipe_context *_pipe,
                          const struct pipe_sampler_state *sampler)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   return pipe->create_sampler_state(pipe,
                                     sampler);
}

static void
rbug_bind_fragment_sampler_states(struct pipe_context *_pipe,
                                  unsigned num_samplers,
                                  void **samplers)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->bind_fragment_sampler_states(pipe,
                                      num_samplers,
                                      samplers);
}

static void
rbug_bind_vertex_sampler_states(struct pipe_context *_pipe,
                                unsigned num_samplers,
                                void **samplers)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->bind_vertex_sampler_states(pipe,
                                    num_samplers,
                                    samplers);
}

static void
rbug_delete_sampler_state(struct pipe_context *_pipe,
                          void *sampler)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->delete_sampler_state(pipe,
                              sampler);
}

static void *
rbug_create_rasterizer_state(struct pipe_context *_pipe,
                             const struct pipe_rasterizer_state *rasterizer)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   return pipe->create_rasterizer_state(pipe,
                                        rasterizer);
}

static void
rbug_bind_rasterizer_state(struct pipe_context *_pipe,
                           void *rasterizer)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->bind_rasterizer_state(pipe,
                               rasterizer);
}

static void
rbug_delete_rasterizer_state(struct pipe_context *_pipe,
                             void *rasterizer)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->delete_rasterizer_state(pipe,
                                 rasterizer);
}

static void *
rbug_create_depth_stencil_alpha_state(struct pipe_context *_pipe,
                                      const struct pipe_depth_stencil_alpha_state *depth_stencil_alpha)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   return pipe->create_depth_stencil_alpha_state(pipe,
                                                 depth_stencil_alpha);
}

static void
rbug_bind_depth_stencil_alpha_state(struct pipe_context *_pipe,
                                    void *depth_stencil_alpha)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->bind_depth_stencil_alpha_state(pipe,
                                        depth_stencil_alpha);
}

static void
rbug_delete_depth_stencil_alpha_state(struct pipe_context *_pipe,
                                      void *depth_stencil_alpha)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->delete_depth_stencil_alpha_state(pipe,
                                          depth_stencil_alpha);
}

static void *
rbug_create_fs_state(struct pipe_context *_pipe,
                     const struct pipe_shader_state *state)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   void *result;

   result = pipe->create_fs_state(pipe, state);
   if (!result)
      return NULL;

   return rbug_shader_create(rb_pipe, state, result, RBUG_SHADER_FRAGMENT);
}

static void
rbug_bind_fs_state(struct pipe_context *_pipe,
                   void *_fs)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   void *fs;

   fs = rbug_shader_unwrap(_fs);
   rb_pipe->curr.fs = rbug_shader(_fs);
   pipe->bind_fs_state(pipe,
                       fs);
}

static void
rbug_delete_fs_state(struct pipe_context *_pipe,
                     void *_fs)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct rbug_shader *rb_shader = rbug_shader(_fs);

   rbug_shader_destroy(rb_pipe, rb_shader);
}

static void *
rbug_create_vs_state(struct pipe_context *_pipe,
                     const struct pipe_shader_state *state)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   void *result;

   result = pipe->create_vs_state(pipe, state);
   if (!result)
      return NULL;

   return rbug_shader_create(rb_pipe, state, result, RBUG_SHADER_VERTEX);
}

static void
rbug_bind_vs_state(struct pipe_context *_pipe,
                   void *_vs)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   void *vs;

   vs = rbug_shader_unwrap(_vs);
   rb_pipe->curr.vs = rbug_shader(_vs);
   pipe->bind_vs_state(pipe,
                       vs);
}

static void
rbug_delete_vs_state(struct pipe_context *_pipe,
                     void *_vs)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct rbug_shader *rb_shader = rbug_shader(_vs);

   rbug_shader_destroy(rb_pipe, rb_shader);
}

static void *
rbug_create_gs_state(struct pipe_context *_pipe,
                     const struct pipe_shader_state *state)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   void *result;

   result = pipe->create_gs_state(pipe, state);
   if (!result)
      return NULL;

   return rbug_shader_create(rb_pipe, state, result, RBUG_SHADER_GEOM);
}

static void
rbug_bind_gs_state(struct pipe_context *_pipe,
                   void *_gs)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   void *gs;

   gs = rbug_shader_unwrap(_gs);
   rb_pipe->curr.gs = rbug_shader(_gs);
   pipe->bind_gs_state(pipe,
                       gs);
}

static void
rbug_delete_gs_state(struct pipe_context *_pipe,
                     void *_gs)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct rbug_shader *rb_shader = rbug_shader(_gs);

   rbug_shader_destroy(rb_pipe, rb_shader);
}

static void *
rbug_create_vertex_elements_state(struct pipe_context *_pipe,
                                  unsigned num_elements,
                                  const struct pipe_vertex_element *vertex_elements)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   return pipe->create_vertex_elements_state(pipe,
                                             num_elements,
                                             vertex_elements);
}

static void
rbug_bind_vertex_elements_state(struct pipe_context *_pipe,
                                void *velems)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->bind_vertex_elements_state(pipe,
                                    velems);
}

static void
rbug_delete_vertex_elements_state(struct pipe_context *_pipe,
                                  void *velems)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->delete_vertex_elements_state(pipe,
                                      velems);
}

static void
rbug_set_blend_color(struct pipe_context *_pipe,
                     const struct pipe_blend_color *blend_color)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->set_blend_color(pipe,
                         blend_color);
}

static void
rbug_set_stencil_ref(struct pipe_context *_pipe,
                     const struct pipe_stencil_ref *stencil_ref)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->set_stencil_ref(pipe,
                         stencil_ref);
}

static void
rbug_set_clip_state(struct pipe_context *_pipe,
                    const struct pipe_clip_state *clip)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->set_clip_state(pipe,
                        clip);
}

static void
rbug_set_constant_buffer(struct pipe_context *_pipe,
                         uint shader,
                         uint index,
                         struct pipe_resource *_resource)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_resource *unwrapped_resource;
   struct pipe_resource *resource = NULL;

   /* XXX hmm? unwrap the input state */
   if (_resource) {
      unwrapped_resource = rbug_resource_unwrap(_resource);
      resource = unwrapped_resource;
   }

   pipe->set_constant_buffer(pipe,
                             shader,
                             index,
                             resource);
}

static void
rbug_set_framebuffer_state(struct pipe_context *_pipe,
                           const struct pipe_framebuffer_state *_state)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_framebuffer_state unwrapped_state;
   struct pipe_framebuffer_state *state = NULL;
   unsigned i;

   rb_pipe->curr.nr_cbufs = 0;
   memset(rb_pipe->curr.cbufs, 0, sizeof(rb_pipe->curr.cbufs));

   /* unwrap the input state */
   if (_state) {
      memcpy(&unwrapped_state, _state, sizeof(unwrapped_state));

      rb_pipe->curr.nr_cbufs = _state->nr_cbufs;
      for(i = 0; i < _state->nr_cbufs; i++) {
         unwrapped_state.cbufs[i] = rbug_surface_unwrap(_state->cbufs[i]);
         if (_state->cbufs[i])
            rb_pipe->curr.cbufs[i] = rbug_resource(_state->cbufs[i]->texture);
      }
      unwrapped_state.zsbuf = rbug_surface_unwrap(_state->zsbuf);
      state = &unwrapped_state;
   }

   pipe->set_framebuffer_state(pipe,
                               state);
}

static void
rbug_set_polygon_stipple(struct pipe_context *_pipe,
                         const struct pipe_poly_stipple *poly_stipple)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->set_polygon_stipple(pipe,
                             poly_stipple);
}

static void
rbug_set_scissor_state(struct pipe_context *_pipe,
                       const struct pipe_scissor_state *scissor)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->set_scissor_state(pipe,
                           scissor);
}

static void
rbug_set_viewport_state(struct pipe_context *_pipe,
                        const struct pipe_viewport_state *viewport)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->set_viewport_state(pipe,
                            viewport);
}

static void
rbug_set_fragment_sampler_views(struct pipe_context *_pipe,
                                unsigned num,
                                struct pipe_sampler_view **_views)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_sampler_view *unwrapped_views[PIPE_MAX_SAMPLERS];
   struct pipe_sampler_view **views = NULL;
   unsigned i;

   rb_pipe->curr.num_fs_views = 0;
   memset(rb_pipe->curr.fs_views, 0, sizeof(rb_pipe->curr.fs_views));
   memset(rb_pipe->curr.fs_texs, 0, sizeof(rb_pipe->curr.fs_texs));
   memset(unwrapped_views, 0, sizeof(unwrapped_views));

   if (_views) {
      rb_pipe->curr.num_fs_views = num;
      for (i = 0; i < num; i++) {
         rb_pipe->curr.fs_views[i] = rbug_sampler_view(_views[i]);
         rb_pipe->curr.fs_texs[i] = rbug_resource(_views[i] ? _views[i]->texture : NULL);
         unwrapped_views[i] = rbug_sampler_view_unwrap(_views[i]);
      }
      views = unwrapped_views;
   }

   pipe->set_fragment_sampler_views(pipe, num, views);
}

static void
rbug_set_vertex_sampler_views(struct pipe_context *_pipe,
                              unsigned num,
                              struct pipe_sampler_view **_views)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_sampler_view *unwrapped_views[PIPE_MAX_VERTEX_SAMPLERS];
   struct pipe_sampler_view **views = NULL;
   unsigned i;

   rb_pipe->curr.num_vs_views = 0;
   memset(rb_pipe->curr.vs_views, 0, sizeof(rb_pipe->curr.vs_views));
   memset(rb_pipe->curr.vs_texs, 0, sizeof(rb_pipe->curr.vs_texs));
   memset(unwrapped_views, 0, sizeof(unwrapped_views));

   if (_views) {
      rb_pipe->curr.num_vs_views = num;
      for (i = 0; i < num; i++) {
         rb_pipe->curr.vs_views[i] = rbug_sampler_view(_views[i]);
         rb_pipe->curr.vs_texs[i] = rbug_resource(_views[i]->texture);
         unwrapped_views[i] = rbug_sampler_view_unwrap(_views[i]);
      }
      views = unwrapped_views;
   }

   pipe->set_vertex_sampler_views(pipe, num, views);
}

static void
rbug_set_vertex_buffers(struct pipe_context *_pipe,
                        unsigned num_buffers,
                        const struct pipe_vertex_buffer *_buffers)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_vertex_buffer unwrapped_buffers[PIPE_MAX_SHADER_INPUTS];
   struct pipe_vertex_buffer *buffers = NULL;
   unsigned i;

   if (num_buffers) {
      memcpy(unwrapped_buffers, _buffers, num_buffers * sizeof(*_buffers));
      for (i = 0; i < num_buffers; i++)
         unwrapped_buffers[i].buffer = rbug_resource_unwrap(_buffers[i].buffer);
      buffers = unwrapped_buffers;
   }

   pipe->set_vertex_buffers(pipe,
                            num_buffers,
                            buffers);
}

static void
rbug_set_index_buffer(struct pipe_context *_pipe,
                      const struct pipe_index_buffer *_ib)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_index_buffer unwrapped_ib, *ib = NULL;

   if (_ib) {
      unwrapped_ib = *_ib;
      unwrapped_ib.buffer = rbug_resource_unwrap(_ib->buffer);
      ib = &unwrapped_ib;
   }

   pipe->set_index_buffer(pipe, ib);
}

static void
rbug_set_sample_mask(struct pipe_context *_pipe,
                     unsigned sample_mask)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->set_sample_mask(pipe, sample_mask);
}

static void
rbug_resource_copy_region(struct pipe_context *_pipe,
                          struct pipe_resource *_dst,
                          struct pipe_subresource subdst,
                          unsigned dstx,
                          unsigned dsty,
                          unsigned dstz,
                          struct pipe_resource *_src,
                          struct pipe_subresource subsrc,
                          unsigned srcx,
                          unsigned srcy,
                          unsigned srcz,
                          unsigned width,
                          unsigned height)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct rbug_resource *rb_resource_dst = rbug_resource(_dst);
   struct rbug_resource *rb_resource_src = rbug_resource(_src);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_resource *dst = rb_resource_dst->resource;
   struct pipe_resource *src = rb_resource_src->resource;

   pipe->resource_copy_region(pipe,
                              dst,
                              subdst,
                              dstx,
                              dsty,
                              dstz,
                              src,
                              subsrc,
                              srcx,
                              srcy,
                              srcz,
                              width,
                              height);
}

static void
rbug_clear(struct pipe_context *_pipe,
           unsigned buffers,
           const float *rgba,
           double depth,
           unsigned stencil)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->clear(pipe,
               buffers,
               rgba,
               depth,
               stencil);
}

static void
rbug_clear_render_target(struct pipe_context *_pipe,
                         struct pipe_surface *_dst,
                         const float *rgba,
                         unsigned dstx, unsigned dsty,
                         unsigned width, unsigned height)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct rbug_surface *rb_surface_dst = rbug_surface(_dst);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_surface *dst = rb_surface_dst->surface;

   pipe->clear_render_target(pipe,
                             dst,
                             rgba,
                             dstx,
                             dsty,
                             width,
                             height);
}

static void
rbug_clear_depth_stencil(struct pipe_context *_pipe,
                         struct pipe_surface *_dst,
                         unsigned clear_flags,
                         double depth,
                         unsigned stencil,
                         unsigned dstx, unsigned dsty,
                         unsigned width, unsigned height)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct rbug_surface *rb_surface_dst = rbug_surface(_dst);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_surface *dst = rb_surface_dst->surface;

   pipe->clear_depth_stencil(pipe,
                             dst,
                             clear_flags,
                             depth,
                             stencil,
                             dstx,
                             dsty,
                             width,
                             height);
}

static void
rbug_flush(struct pipe_context *_pipe,
           unsigned flags,
           struct pipe_fence_handle **fence)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct pipe_context *pipe = rb_pipe->pipe;

   pipe->flush(pipe,
               flags,
               fence);
}

static unsigned int
rbug_is_resource_referenced(struct pipe_context *_pipe,
                            struct pipe_resource *_resource,
                            unsigned face,
                            unsigned level)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct rbug_resource *rb_resource = rbug_resource(_resource);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_resource *resource = rb_resource->resource;

   return pipe->is_resource_referenced(pipe,
                                       resource,
                                       face,
                                       level);
}

static struct pipe_sampler_view *
rbug_context_create_sampler_view(struct pipe_context *_pipe,
                                 struct pipe_resource *_resource,
                                 const struct pipe_sampler_view *templ)
{
   struct rbug_context *rb_pipe = rbug_context(_pipe);
   struct rbug_resource *rb_resource = rbug_resource(_resource);
   struct pipe_context *pipe = rb_pipe->pipe;
   struct pipe_resource *resource = rb_resource->resource;
   struct pipe_sampler_view *result;

   result = pipe->create_sampler_view(pipe,
                                      resource,
                                      templ);

   if (result)
      return rbug_sampler_view_create(rb_pipe, rb_resource, result);
   return NULL;
}

static void
rbug_context_sampler_view_destroy(struct pipe_context *_pipe,
                                  struct pipe_sampler_view *_view)
{
   rbug_sampler_view_destroy(rbug_context(_pipe),
                             rbug_sampler_view(_view));
}

static struct pipe_transfer *
rbug_context_get_transfer(struct pipe_context *_context,
                          struct pipe_resource *_resource,
                          struct pipe_subresource sr,
                          unsigned usage,
                          const struct pipe_box *box)
{
   struct rbug_context *rb_pipe = rbug_context(_context);
   struct rbug_resource *rb_resource = rbug_resource(_resource);
   struct pipe_context *context = rb_pipe->pipe;
   struct pipe_resource *resource = rb_resource->resource;
   struct pipe_transfer *result;

   result = context->get_transfer(context,
                                  resource,
                                  sr,
                                  usage,
                                  box);

   if (result)
      return rbug_transfer_create(rb_pipe, rb_resource, result);
   return NULL;
}

static void
rbug_context_transfer_destroy(struct pipe_context *_pipe,
                              struct pipe_transfer *_transfer)
{
   rbug_transfer_destroy(rbug_context(_pipe),
                             rbug_transfer(_transfer));
}

static void *
rbug_context_transfer_map(struct pipe_context *_context,
                          struct pipe_transfer *_transfer)
{
   struct rbug_context *rb_pipe = rbug_context(_context);
   struct rbug_transfer *rb_transfer = rbug_transfer(_transfer);
   struct pipe_context *context = rb_pipe->pipe;
   struct pipe_transfer *transfer = rb_transfer->transfer;

   return context->transfer_map(context,
                                transfer);
}



static void
rbug_context_transfer_flush_region(struct pipe_context *_context,
                                   struct pipe_transfer *_transfer,
                                   const struct pipe_box *box)
{
   struct rbug_context *rb_pipe = rbug_context(_context);
   struct rbug_transfer *rb_transfer = rbug_transfer(_transfer);
   struct pipe_context *context = rb_pipe->pipe;
   struct pipe_transfer *transfer = rb_transfer->transfer;

   context->transfer_flush_region(context,
                                  transfer,
                                  box);
}


static void
rbug_context_transfer_unmap(struct pipe_context *_context,
                            struct pipe_transfer *_transfer)
{
   struct rbug_context *rb_pipe = rbug_context(_context);
   struct rbug_transfer *rb_transfer = rbug_transfer(_transfer);
   struct pipe_context *context = rb_pipe->pipe;
   struct pipe_transfer *transfer = rb_transfer->transfer;

   context->transfer_unmap(context,
                           transfer);
}


static void
rbug_context_transfer_inline_write(struct pipe_context *_context,
                                   struct pipe_resource *_resource,
                                   struct pipe_subresource sr,
                                   unsigned usage,
                                   const struct pipe_box *box,
                                   const void *data,
                                   unsigned stride,
                                   unsigned slice_stride)
{
   struct rbug_context *rb_pipe = rbug_context(_context);
   struct rbug_resource *rb_resource = rbug_resource(_resource);
   struct pipe_context *context = rb_pipe->pipe;
   struct pipe_resource *resource = rb_resource->resource;

   context->transfer_inline_write(context,
                                  resource,
                                  sr,
                                  usage,
                                  box,
                                  data,
                                  stride,
                                  slice_stride);
}


struct pipe_context *
rbug_context_create(struct pipe_screen *_screen, struct pipe_context *pipe)
{
   struct rbug_context *rb_pipe;
   struct rbug_screen *rb_screen = rbug_screen(_screen);

   if (!rb_screen)
      return NULL;

   rb_pipe = CALLOC_STRUCT(rbug_context);
   if (!rb_pipe)
      return NULL;

   pipe_mutex_init(rb_pipe->draw_mutex);
   pipe_condvar_init(rb_pipe->draw_cond);
   pipe_mutex_init(rb_pipe->call_mutex);
   pipe_mutex_init(rb_pipe->list_mutex);
   make_empty_list(&rb_pipe->shaders);

   rb_pipe->base.winsys = NULL;
   rb_pipe->base.screen = _screen;
   rb_pipe->base.priv = pipe->priv; /* expose wrapped data */
   rb_pipe->base.draw = NULL;

   rb_pipe->base.destroy = rbug_destroy;
   rb_pipe->base.draw_vbo = rbug_draw_vbo;
   rb_pipe->base.create_query = rbug_create_query;
   rb_pipe->base.destroy_query = rbug_destroy_query;
   rb_pipe->base.begin_query = rbug_begin_query;
   rb_pipe->base.end_query = rbug_end_query;
   rb_pipe->base.get_query_result = rbug_get_query_result;
   rb_pipe->base.create_blend_state = rbug_create_blend_state;
   rb_pipe->base.bind_blend_state = rbug_bind_blend_state;
   rb_pipe->base.delete_blend_state = rbug_delete_blend_state;
   rb_pipe->base.create_sampler_state = rbug_create_sampler_state;
   rb_pipe->base.bind_fragment_sampler_states = rbug_bind_fragment_sampler_states;
   rb_pipe->base.bind_vertex_sampler_states = rbug_bind_vertex_sampler_states;
   rb_pipe->base.delete_sampler_state = rbug_delete_sampler_state;
   rb_pipe->base.create_rasterizer_state = rbug_create_rasterizer_state;
   rb_pipe->base.bind_rasterizer_state = rbug_bind_rasterizer_state;
   rb_pipe->base.delete_rasterizer_state = rbug_delete_rasterizer_state;
   rb_pipe->base.create_depth_stencil_alpha_state = rbug_create_depth_stencil_alpha_state;
   rb_pipe->base.bind_depth_stencil_alpha_state = rbug_bind_depth_stencil_alpha_state;
   rb_pipe->base.delete_depth_stencil_alpha_state = rbug_delete_depth_stencil_alpha_state;
   rb_pipe->base.create_fs_state = rbug_create_fs_state;
   rb_pipe->base.bind_fs_state = rbug_bind_fs_state;
   rb_pipe->base.delete_fs_state = rbug_delete_fs_state;
   rb_pipe->base.create_vs_state = rbug_create_vs_state;
   rb_pipe->base.bind_vs_state = rbug_bind_vs_state;
   rb_pipe->base.delete_vs_state = rbug_delete_vs_state;
   rb_pipe->base.create_gs_state = rbug_create_gs_state;
   rb_pipe->base.bind_gs_state = rbug_bind_gs_state;
   rb_pipe->base.delete_gs_state = rbug_delete_gs_state;
   rb_pipe->base.create_vertex_elements_state = rbug_create_vertex_elements_state;
   rb_pipe->base.bind_vertex_elements_state = rbug_bind_vertex_elements_state;
   rb_pipe->base.delete_vertex_elements_state = rbug_delete_vertex_elements_state;
   rb_pipe->base.set_blend_color = rbug_set_blend_color;
   rb_pipe->base.set_stencil_ref = rbug_set_stencil_ref;
   rb_pipe->base.set_clip_state = rbug_set_clip_state;
   rb_pipe->base.set_constant_buffer = rbug_set_constant_buffer;
   rb_pipe->base.set_framebuffer_state = rbug_set_framebuffer_state;
   rb_pipe->base.set_polygon_stipple = rbug_set_polygon_stipple;
   rb_pipe->base.set_scissor_state = rbug_set_scissor_state;
   rb_pipe->base.set_viewport_state = rbug_set_viewport_state;
   rb_pipe->base.set_fragment_sampler_views = rbug_set_fragment_sampler_views;
   rb_pipe->base.set_vertex_sampler_views = rbug_set_vertex_sampler_views;
   rb_pipe->base.set_vertex_buffers = rbug_set_vertex_buffers;
   rb_pipe->base.set_index_buffer = rbug_set_index_buffer;
   rb_pipe->base.set_sample_mask = rbug_set_sample_mask;
   rb_pipe->base.resource_copy_region = rbug_resource_copy_region;
   rb_pipe->base.clear = rbug_clear;
   rb_pipe->base.clear_render_target = rbug_clear_render_target;
   rb_pipe->base.clear_depth_stencil = rbug_clear_depth_stencil;
   rb_pipe->base.flush = rbug_flush;
   rb_pipe->base.is_resource_referenced = rbug_is_resource_referenced;
   rb_pipe->base.create_sampler_view = rbug_context_create_sampler_view;
   rb_pipe->base.sampler_view_destroy = rbug_context_sampler_view_destroy;
   rb_pipe->base.get_transfer = rbug_context_get_transfer;
   rb_pipe->base.transfer_destroy = rbug_context_transfer_destroy;
   rb_pipe->base.transfer_map = rbug_context_transfer_map;
   rb_pipe->base.transfer_unmap = rbug_context_transfer_unmap;
   rb_pipe->base.transfer_flush_region = rbug_context_transfer_flush_region;
   rb_pipe->base.transfer_inline_write = rbug_context_transfer_inline_write;

   rb_pipe->pipe = pipe;

   rbug_screen_add_to_list(rb_screen, contexts, rb_pipe);

   return &rb_pipe->base;
}