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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
  4.  * All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the
  8.  * "Software"), to deal in the Software without restriction, including
  9.  * without limitation the rights to use, copy, modify, merge, publish,
  10.  * distribute, sub license, and/or sell copies of the Software, and to
  11.  * permit persons to whom the Software is furnished to do so, subject to
  12.  * the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice (including the
  15.  * next paragraph) shall be included in all copies or substantial portions
  16.  * of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21.  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  *
  26.  **************************************************************************/
  27.  /*
  28.   * Authors:
  29.   *   Keith Whitwell <keith@tungstengraphics.com>
  30.   *   Michel Dänzer <michel@tungstengraphics.com>
  31.   */
  32.  
  33. #include "pipe/p_context.h"
  34. #include "pipe/p_defines.h"
  35. #include "util/u_inlines.h"
  36. #include "util/u_math.h"
  37. #include "util/u_memory.h"
  38.  
  39. #include "i915_context.h"
  40. #include "i915_resource.h"
  41.  
  42.  
  43.  
  44. static boolean
  45. i915_buffer_get_handle(struct pipe_screen *screen,
  46.                        struct pipe_resource *resource,
  47.                        struct winsys_handle *handle)
  48. {
  49.    return FALSE;
  50. }
  51.  
  52. static void
  53. i915_buffer_destroy(struct pipe_screen *screen,
  54.                     struct pipe_resource *resource)
  55. {
  56.    struct i915_buffer *buffer = i915_buffer(resource);
  57.    if (buffer->free_on_destroy)
  58.       align_free(buffer->data);
  59.    FREE(buffer);
  60. }
  61.  
  62.  
  63. static void *
  64. i915_buffer_transfer_map(struct pipe_context *pipe,
  65.                          struct pipe_resource *resource,
  66.                          unsigned level,
  67.                          unsigned usage,
  68.                          const struct pipe_box *box,
  69.                          struct pipe_transfer **ptransfer)
  70. {
  71.    struct i915_context *i915 = i915_context(pipe);
  72.    struct i915_buffer *buffer = i915_buffer(resource);
  73.    struct pipe_transfer *transfer = util_slab_alloc(&i915->transfer_pool);
  74.  
  75.    if (transfer == NULL)
  76.       return NULL;
  77.  
  78.    transfer->resource = resource;
  79.    transfer->level = level;
  80.    transfer->usage = usage;
  81.    transfer->box = *box;
  82.    *ptransfer = transfer;
  83.  
  84.    return buffer->data + transfer->box.x;
  85. }
  86.  
  87. static void
  88. i915_buffer_transfer_unmap(struct pipe_context *pipe,
  89.                            struct pipe_transfer *transfer)
  90. {
  91.    struct i915_context *i915 = i915_context(pipe);
  92.    util_slab_free(&i915->transfer_pool, transfer);
  93. }
  94.  
  95. static void
  96. i915_buffer_transfer_inline_write( struct pipe_context *rm_ctx,
  97.                                    struct pipe_resource *resource,
  98.                                    unsigned level,
  99.                                    unsigned usage,
  100.                                    const struct pipe_box *box,
  101.                                    const void *data,
  102.                                    unsigned stride,
  103.                                    unsigned layer_stride)
  104. {
  105.    struct i915_buffer *buffer = i915_buffer(resource);
  106.  
  107.    memcpy(buffer->data + box->x,
  108.           data,
  109.           box->width);
  110. }
  111.  
  112.  
  113. struct u_resource_vtbl i915_buffer_vtbl =
  114. {
  115.    i915_buffer_get_handle,           /* get_handle */
  116.    i915_buffer_destroy,              /* resource_destroy */
  117.    i915_buffer_transfer_map,         /* transfer_map */
  118.    u_default_transfer_flush_region,  /* transfer_flush_region */
  119.    i915_buffer_transfer_unmap,       /* transfer_unmap */
  120.    i915_buffer_transfer_inline_write /* transfer_inline_write */
  121. };
  122.  
  123.  
  124.  
  125. struct pipe_resource *
  126. i915_buffer_create(struct pipe_screen *screen,
  127.                     const struct pipe_resource *template)
  128. {
  129.    struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
  130.  
  131.    if (!buf)
  132.       return NULL;
  133.  
  134.    buf->b.b = *template;
  135.    buf->b.vtbl = &i915_buffer_vtbl;
  136.    pipe_reference_init(&buf->b.b.reference, 1);
  137.    buf->b.b.screen = screen;
  138.    buf->data = align_malloc(template->width0, 16);
  139.    buf->free_on_destroy = TRUE;
  140.  
  141.    if (!buf->data)
  142.       goto err;
  143.  
  144.    return &buf->b.b;
  145.  
  146. err:
  147.    FREE(buf);
  148.    return NULL;
  149. }
  150.  
  151.  
  152.  
  153. struct pipe_resource *
  154. i915_user_buffer_create(struct pipe_screen *screen,
  155.                         void *ptr,
  156.                         unsigned bytes,
  157.                         unsigned bind)
  158. {
  159.    struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
  160.  
  161.    if (!buf)
  162.       return NULL;
  163.  
  164.    pipe_reference_init(&buf->b.b.reference, 1);
  165.    buf->b.vtbl = &i915_buffer_vtbl;
  166.    buf->b.b.screen = screen;
  167.    buf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */
  168.    buf->b.b.usage = PIPE_USAGE_IMMUTABLE;
  169.    buf->b.b.bind = bind;
  170.    buf->b.b.flags = 0;
  171.    buf->b.b.width0 = bytes;
  172.    buf->b.b.height0 = 1;
  173.    buf->b.b.depth0 = 1;
  174.    buf->b.b.array_size = 1;
  175.  
  176.    buf->data = ptr;
  177.    buf->free_on_destroy = FALSE;
  178.  
  179.    return &buf->b.b;
  180. }
  181.