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 struct pipe_transfer *
  64 i915_get_transfer(struct pipe_context *pipe,
  65                   struct pipe_resource *resource,
  66                   unsigned level,
  67                   unsigned usage,
  68                   const struct pipe_box *box)
  69 {
  70    struct i915_context *i915 = i915_context(pipe);
  71    struct pipe_transfer *transfer = util_slab_alloc(&i915->transfer_pool);
  72
  73    if (transfer == NULL)
  74       return NULL;
  75
  76    transfer->resource = resource;
  77    transfer->level = level;
  78    transfer->usage = usage;
  79    transfer->box = *box;
  80
  81    /* Note strides are zero, this is ok for buffers, but not for
  82     * textures 2d & higher at least.
  83     */
  84    return transfer;
  85 }
  86
  87 static void
  88 i915_transfer_destroy(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_map( struct pipe_context *pipe,
  97                           struct pipe_transfer *transfer )
  98 {
  99    struct i915_buffer *buffer = i915_buffer(transfer->resource);
 100    return buffer->data + transfer->box.x;
 101 }
 102
 103
 104 static void
 105 i915_buffer_transfer_inline_write( struct pipe_context *rm_ctx,
 106                                    struct pipe_resource *resource,
 107                                    unsigned level,
 108                                    unsigned usage,
 109                                    const struct pipe_box *box,
 110                                    const void *data,
 111                                    unsigned stride,
 112                                    unsigned layer_stride)
 113 {
 114    struct i915_buffer *buffer = i915_buffer(resource);
 115
 116    memcpy(buffer->data + box->x,
 117           data,
 118           box->width);
 119 }
 120
 121
 122 struct u_resource_vtbl i915_buffer_vtbl =
 123 {
 124    i915_buffer_get_handle,           /* get_handle */
 125    i915_buffer_destroy,              /* resource_destroy */
 126    i915_get_transfer,                /* get_transfer */
 127    i915_transfer_destroy,            /* transfer_destroy */
 128    i915_buffer_transfer_map,         /* transfer_map */
 129    u_default_transfer_flush_region,  /* transfer_flush_region */
 130    u_default_transfer_unmap,         /* transfer_unmap */
 131    i915_buffer_transfer_inline_write /* transfer_inline_write */
 132 };
 133
 134
 135
 136 struct pipe_resource *
 137 i915_buffer_create(struct pipe_screen *screen,
 138                     const struct pipe_resource *template)
 139 {
 140    struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
 141
 142    if (!buf)
 143       return NULL;
 144
 145    buf->b.b = *template;
 146    buf->b.vtbl = &i915_buffer_vtbl;
 147    pipe_reference_init(&buf->b.b.reference, 1);
 148    buf->b.b.screen = screen;
 149    buf->data = align_malloc(template->width0, 16);
 150    buf->free_on_destroy = TRUE;
 151
 152    if (!buf->data)
 153       goto err;
 154
 155    return &buf->b.b;
 156
 157 err:
 158    FREE(buf);
 159    return NULL;
 160 }
 161
 162
 163
 164 struct pipe_resource *
 165 i915_user_buffer_create(struct pipe_screen *screen,
 166                         void *ptr,
 167                         unsigned bytes,
 168                         unsigned bind)
 169 {
 170    struct i915_buffer *buf = CALLOC_STRUCT(i915_buffer);
 171
 172    if (!buf)
 173       return NULL;
 174
 175    pipe_reference_init(&buf->b.b.reference, 1);
 176    buf->b.vtbl = &i915_buffer_vtbl;
 177    buf->b.b.screen = screen;
 178    buf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */
 179    buf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 180    buf->b.b.bind = bind;
 181    buf->b.b.flags = 0;
 182    buf->b.b.width0 = bytes;
 183    buf->b.b.height0 = 1;
 184    buf->b.b.depth0 = 1;
 185    buf->b.b.array_size = 1;
 186
 187    buf->data = ptr;
 188    buf->free_on_destroy = FALSE;
 189
 190    return &buf->b.b;
 191 }