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

 *

 * Copyright 2006 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.

 *

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

 /*

  * Authors:

  *   Keith Whitwell 

  *   Michel Dänzer 

  */

#include "pipe/p_context.h"

#include "pipe/p_defines.h"

#include "util/u_inlines.h"

#include "util/u_math.h"

#include "util/u_memory.h"

#include "i915_context.h"

#include "i915_resource.h"

static boolean

i915_buffer_get_handle(struct pipe_screen *screen,

		       struct pipe_resource *resource,

		       struct winsys_handle *handle)

{

   return FALSE;

}

static void

i915_buffer_destroy(struct pipe_screen *screen,

		    struct pipe_resource *resource)

{

   struct i915_buffer *buffer = i915_buffer(resource);

   if (buffer->free_on_destroy)

      align_free(buffer->data);

   FREE(buffer);

}

static void *

i915_buffer_transfer_map(struct pipe_context *pipe,

                         struct pipe_resource *resource,

                         unsigned level,

                         unsigned usage,

                         const struct pipe_box *box,

                         struct pipe_transfer **ptransfer)

{

   struct i915_context *i915 = i915_context(pipe);

   struct i915_buffer *buffer = i915_buffer(resource);

   struct pipe_transfer *transfer = util_slab_alloc(&i915->transfer_pool);

   if (transfer == NULL)

      return NULL;

   transfer->resource = resource;

   transfer->level = level;

   transfer->usage = usage;

   transfer->box = *box;

   *ptransfer = transfer;

   return buffer->data + transfer->box.x;

}

static void

i915_buffer_transfer_unmap(struct pipe_context *pipe,

                           struct pipe_transfer *transfer)

{

   struct i915_context *i915 = i915_context(pipe);

   util_slab_free(&i915->transfer_pool, transfer);

}

static void

i915_buffer_transfer_inline_write( struct pipe_context *rm_ctx,

                                   struct pipe_resource *resource,

                                   unsigned level,

                                   unsigned usage,

                                   const struct pipe_box *box,

                                   const void *data,

                                   unsigned stride,

                                   unsigned layer_stride)

{

   struct i915_buffer *buffer = i915_buffer(resource);

   memcpy(buffer->data + box->x,

          data,

          box->width);

}

struct u_resource_vtbl i915_buffer_vtbl =

{

   i915_buffer_get_handle,	     /* get_handle */

   i915_buffer_destroy,		     /* resource_destroy */

   i915_buffer_transfer_map,	     /* transfer_map */

   u_default_transfer_flush_region,  /* transfer_flush_region */

   i915_buffer_transfer_unmap,	     /* transfer_unmap */

   i915_buffer_transfer_inline_write /* transfer_inline_write */

};

struct pipe_resource *

i915_buffer_create(struct pipe_screen *screen,

                    const struct pipe_resource *template)

{

   struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);

   if (!buf)

      return NULL;

   buf->b.b = *template;

   buf->b.vtbl = &i915_buffer_vtbl;

   pipe_reference_init(&buf->b.b.reference, 1);

   buf->b.b.screen = screen;

   buf->data = align_malloc(template->width0, 64);

   buf->free_on_destroy = TRUE;

   if (!buf->data)

      goto err;

   return &buf->b.b;

err:

   FREE(buf);

   return NULL;

}

struct pipe_resource *

i915_user_buffer_create(struct pipe_screen *screen,

                        void *ptr,

                        unsigned bytes,

                        unsigned bind)

{

   struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);

   if (!buf)

      return NULL;

   pipe_reference_init(&buf->b.b.reference, 1);

   buf->b.vtbl = &i915_buffer_vtbl;

   buf->b.b.screen = screen;

   buf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */

   buf->b.b.usage = PIPE_USAGE_IMMUTABLE;

   buf->b.b.bind = bind;

   buf->b.b.flags = 0;

   buf->b.b.width0 = bytes;

   buf->b.b.height0 = 1;

   buf->b.b.depth0 = 1;

   buf->b.b.array_size = 1;

   buf->data = ptr;

   buf->free_on_destroy = FALSE;

   return &buf->b.b;

}