src/gallium/drivers/llvmpipe/lp_buffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 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
  29 #include "util/u_inlines.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_math.h"
  32
  33 #include "lp_winsys.h"
  34 #include "lp_screen.h"
  35 #include "lp_texture.h"
  36 #include "lp_buffer.h"
  37
  38
  39 static void *
  40 llvmpipe_buffer_map(struct pipe_screen *screen,
  41                     struct pipe_buffer *buf,
  42                     unsigned flags)
  43 {
  44    struct llvmpipe_buffer *llvmpipe_buf = llvmpipe_buffer(buf);
  45    return llvmpipe_buf->data;
  46 }
  47
  48
  49 static void
  50 llvmpipe_buffer_unmap(struct pipe_screen *screen,
  51                       struct pipe_buffer *buf)
  52 {
  53 }
  54
  55
  56 static void
  57 llvmpipe_buffer_destroy(struct pipe_buffer *buf)
  58 {
  59    struct llvmpipe_buffer *sbuf = llvmpipe_buffer(buf);
  60
  61    if (!sbuf->userBuffer)
  62       align_free(sbuf->data);
  63
  64    FREE(sbuf);
  65 }
  66
  67
  68 static struct pipe_buffer *
  69 llvmpipe_buffer_create(struct pipe_screen *screen,
  70                        unsigned alignment,
  71                        unsigned usage,
  72                        unsigned size)
  73 {
  74    struct llvmpipe_buffer *buffer = CALLOC_STRUCT(llvmpipe_buffer);
  75
  76    pipe_reference_init(&buffer->base.reference, 1);
  77    buffer->base.screen = screen;
  78    buffer->base.alignment = MAX2(alignment, 16);
  79    buffer->base.usage = usage;
  80    buffer->base.size = size;
  81
  82    buffer->data = align_malloc(size, alignment);
  83
  84    return &buffer->base;
  85 }
  86
  87
  88 /**
  89  * Create buffer which wraps user-space data.
  90  */
  91 static struct pipe_buffer *
  92 llvmpipe_user_buffer_create(struct pipe_screen *screen,
  93                             void *ptr,
  94                             unsigned bytes)
  95 {
  96    struct llvmpipe_buffer *buffer;
  97
  98    buffer = CALLOC_STRUCT(llvmpipe_buffer);
  99    if(!buffer)
 100       return NULL;
 101
 102    pipe_reference_init(&buffer->base.reference, 1);
 103    buffer->base.screen = screen;
 104    buffer->base.size = bytes;
 105    buffer->userBuffer = TRUE;
 106    buffer->data = ptr;
 107
 108    return &buffer->base;
 109 }
 110
 111
 112 static void
 113 llvmpipe_fence_reference(struct pipe_screen *screen,
 114                          struct pipe_fence_handle **ptr,
 115                          struct pipe_fence_handle *fence)
 116 {
 117 }
 118
 119
 120 static int
 121 llvmpipe_fence_signalled(struct pipe_screen *screen,
 122                          struct pipe_fence_handle *fence,
 123                          unsigned flag)
 124 {
 125    return 0;
 126 }
 127
 128
 129 static int
 130 llvmpipe_fence_finish(struct pipe_screen *screen,
 131                       struct pipe_fence_handle *fence,
 132                       unsigned flag)
 133 {
 134    return 0;
 135 }
 136
 137
 138 void
 139 llvmpipe_init_screen_buffer_funcs(struct pipe_screen *screen)
 140 {
 141    screen->buffer_create = llvmpipe_buffer_create;
 142    screen->user_buffer_create = llvmpipe_user_buffer_create;
 143    screen->buffer_map = llvmpipe_buffer_map;
 144    screen->buffer_unmap = llvmpipe_buffer_unmap;
 145    screen->buffer_destroy = llvmpipe_buffer_destroy;
 146
 147    screen->fence_reference = llvmpipe_fence_reference;
 148    screen->fence_signalled = llvmpipe_fence_signalled;
 149    screen->fence_finish = llvmpipe_fence_finish;
 150
 151 }