src/gallium/drivers/i915/i915_resource_buffer.c

   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_transfer *transfer )
  66 {
  67    struct i915_buffer *buffer = i915_buffer(transfer->resource);
  68    return buffer->data + transfer->box.x;
  69 }
  70
  71
  72 static void
  73 i915_buffer_transfer_inline_write( struct pipe_context *rm_ctx,
  74                                    struct pipe_resource *resource,
  75                                    struct pipe_subresource sr,
  76                                    unsigned usage,
  77                                    const struct pipe_box *box,
  78                                    const void *data,
  79                                    unsigned stride,
  80                                    unsigned slice_stride)
  81 {
  82    struct i915_buffer *buffer = i915_buffer(resource);
  83
  84    memcpy(buffer->data + box->x,
  85           data,
  86           box->width);
  87 }
  88
  89
  90 struct u_resource_vtbl i915_buffer_vtbl =
  91 {
  92    i915_buffer_get_handle,           /* get_handle */
  93    i915_buffer_destroy,              /* resource_destroy */
  94    NULL,                             /* is_resource_referenced */
  95    u_default_get_transfer,           /* get_transfer */
  96    u_default_transfer_destroy,       /* transfer_destroy */
  97    i915_buffer_transfer_map,         /* transfer_map */
  98    u_default_transfer_flush_region,  /* transfer_flush_region */
  99    u_default_transfer_unmap,         /* transfer_unmap */
 100    i915_buffer_transfer_inline_write /* transfer_inline_write */
 101 };
 102
 103
 104
 105 struct pipe_resource *
 106 i915_buffer_create(struct pipe_screen *screen,
 107                     const struct pipe_resource *template)
 108 {
 109    struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
 110
 111    if (!buf)
 112       return NULL;
 113
 114    buf->b.b = *template;
 115    buf->b.vtbl = &i915_buffer_vtbl;
 116    pipe_reference_init(&buf->b.b.reference, 1);
 117    buf->b.b.screen = screen;
 118
 119    buf->data = MALLOC(template->width0);
 120    buf->free_on_destroy = TRUE;
 121
 122    if (!buf->data)
 123       goto err;
 124
 125    return &buf->b.b;
 126
 127 err:
 128    FREE(buf);
 129    return NULL;
 130 }
 131
 132
 133
 134 struct pipe_resource *
 135 i915_user_buffer_create(struct pipe_screen *screen,
 136                         void *ptr,
 137                         unsigned bytes,
 138                         unsigned bind)
 139 {
 140    struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
 141
 142    if (!buf)
 143       return NULL;
 144
 145    pipe_reference_init(&buf->b.b.reference, 1);
 146    buf->b.vtbl = &i915_buffer_vtbl;
 147    buf->b.b.screen = screen;
 148    buf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */
 149    buf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 150    buf->b.b.bind = bind;
 151    buf->b.b.flags = 0;
 152    buf->b.b.width0 = bytes;
 153    buf->b.b.height0 = 1;
 154    buf->b.b.depth0 = 1;
 155
 156    buf->data = ptr;
 157    buf->free_on_destroy = FALSE;
 158
 159    return &buf->b.b;
 160 }