src/gallium/drivers/i915/i915_resource_buffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 VMware, Inc.
   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 VMWARE 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 <keithw@vmware.com>
  30   *   Michel Dänzer <daenzer@vmware.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 = slab_alloc_st(&i915->transfer_pool);
  74
  75    if (!transfer)
  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    slab_free_st(&i915->transfer_pool, transfer);
  93 }
  94
  95 void
  96 i915_buffer_subdata(struct pipe_context *rm_ctx,
  97                     struct pipe_resource *resource,
  98                     unsigned usage, unsigned offset,
  99                     unsigned size, const void *data)
 100 {
 101    struct i915_buffer *buffer = i915_buffer(resource);
 102
 103    memcpy(buffer->data + offset, data, size);
 104 }
 105
 106
 107 struct u_resource_vtbl i915_buffer_vtbl =
 108 {
 109    i915_buffer_get_handle,           /* get_handle */
 110    i915_buffer_destroy,              /* resource_destroy */
 111    i915_buffer_transfer_map,         /* transfer_map */
 112    u_default_transfer_flush_region,  /* transfer_flush_region */
 113    i915_buffer_transfer_unmap,       /* transfer_unmap */
 114 };
 115
 116
 117
 118 struct pipe_resource *
 119 i915_buffer_create(struct pipe_screen *screen,
 120                     const struct pipe_resource *template)
 121 {
 122    struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
 123
 124    if (!buf)
 125       return NULL;
 126
 127    buf->b.b = *template;
 128    buf->b.vtbl = &i915_buffer_vtbl;
 129    pipe_reference_init(&buf->b.b.reference, 1);
 130    buf->b.b.screen = screen;
 131    buf->data = align_malloc(template->width0, 64);
 132    buf->free_on_destroy = TRUE;
 133
 134    if (!buf->data)
 135       goto err;
 136
 137    return &buf->b.b;
 138
 139 err:
 140    FREE(buf);
 141    return NULL;
 142 }
 143
 144
 145
 146 struct pipe_resource *
 147 i915_user_buffer_create(struct pipe_screen *screen,
 148                         void *ptr,
 149                         unsigned bytes,
 150                         unsigned bind)
 151 {
 152    struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
 153
 154    if (!buf)
 155       return NULL;
 156
 157    pipe_reference_init(&buf->b.b.reference, 1);
 158    buf->b.vtbl = &i915_buffer_vtbl;
 159    buf->b.b.screen = screen;
 160    buf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */
 161    buf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 162    buf->b.b.bind = bind;
 163    buf->b.b.flags = 0;
 164    buf->b.b.width0 = bytes;
 165    buf->b.b.height0 = 1;
 166    buf->b.b.depth0 = 1;
 167    buf->b.b.array_size = 1;
 168
 169    buf->data = ptr;
 170    buf->free_on_destroy = FALSE;
 171
 172    return &buf->b.b;
 173 }