src/mesa/state_tracker/st_cb_bufferobjects.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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
  29 #include "main/imports.h"
  30 #include "main/mtypes.h"
  31 #include "main/bufferobj.h"
  32
  33 #include "st_context.h"
  34 #include "st_cb_bufferobjects.h"
  35
  36 #include "pipe/p_context.h"
  37 #include "pipe/p_defines.h"
  38 #include "pipe/p_winsys.h"
  39
  40
  41
  42 /* Pixel buffers and Vertex/index buffers are handled through these
  43  * mesa callbacks.  Framebuffer/Renderbuffer objects are
  44  * created/managed elsewhere.
  45  */
  46
  47
  48
  49 /**
  50  * There is some duplication between mesa's bufferobjects and our
  51  * bufmgr buffers.  Both have an integer handle and a hashtable to
  52  * lookup an opaque structure.  It would be nice if the handles and
  53  * internal structure where somehow shared.
  54  */
  55 static struct gl_buffer_object *
  56 st_bufferobj_alloc(GLcontext *ctx, GLuint name, GLenum target)
  57 {
  58    struct st_context *st = st_context(ctx);
  59    struct st_buffer_object *st_obj = CALLOC_STRUCT(st_buffer_object);
  60
  61    if (!st_obj)
  62       return NULL;
  63
  64    _mesa_initialize_buffer_object(&st_obj->Base, name, target);
  65
  66    st_obj->buffer = st->pipe->winsys->buffer_create( st->pipe->winsys, 32 );
  67
  68    return &st_obj->Base;
  69 }
  70
  71
  72
  73 /**
  74  * Deallocate/free a vertex/pixel buffer object.
  75  * Called via glDeleteBuffersARB().
  76  */
  77 static void
  78 st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
  79 {
  80    struct pipe_context *pipe = st_context(ctx)->pipe;
  81    struct st_buffer_object *st_obj = st_buffer_object(obj);
  82
  83    if (st_obj->buffer)
  84       pipe->winsys->buffer_reference(pipe->winsys, &st_obj->buffer, NULL);
  85
  86    free(st_obj);
  87 }
  88
  89
  90
  91 /**
  92  * Allocate space for and store data in a buffer object.  Any data that was
  93  * previously stored in the buffer object is lost.  If data is NULL,
  94  * memory will be allocated, but no copy will occur.
  95  * Called via glBufferDataARB().
  96  */
  97 static void
  98 st_bufferobj_data(GLcontext *ctx,
  99                   GLenum target,
 100                   GLsizeiptrARB size,
 101                   const GLvoid * data,
 102                   GLenum usage,
 103                   struct gl_buffer_object *obj)
 104 {
 105    struct pipe_context *pipe = st_context(ctx)->pipe;
 106    struct st_buffer_object *st_obj = st_buffer_object(obj);
 107    unsigned buffer_usage;
 108
 109    st_obj->Base.Size = size;
 110    st_obj->Base.Usage = usage;
 111
 112    switch(target) {
 113    case GL_PIXEL_PACK_BUFFER_ARB:
 114    case GL_PIXEL_UNPACK_BUFFER_ARB:
 115       buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
 116       break;
 117    case GL_ARRAY_BUFFER_ARB:
 118       buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
 119       break;
 120    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 121       buffer_usage = PIPE_BUFFER_USAGE_INDEX;
 122       break;
 123    default:
 124       buffer_usage = 0;
 125    }
 126
 127    pipe->winsys->buffer_data( pipe->winsys, st_obj->buffer,
 128                               size, data,
 129                               buffer_usage );
 130 }
 131
 132
 133 /**
 134  * Replace data in a subrange of buffer object.  If the data range
 135  * specified by size + offset extends beyond the end of the buffer or
 136  * if data is NULL, no copy is performed.
 137  * Called via glBufferSubDataARB().
 138  */
 139 static void
 140 st_bufferobj_subdata(GLcontext *ctx,
 141                      GLenum target,
 142                      GLintptrARB offset,
 143                      GLsizeiptrARB size,
 144                      const GLvoid * data, struct gl_buffer_object *obj)
 145 {
 146    struct pipe_context *pipe = st_context(ctx)->pipe;
 147    struct st_buffer_object *st_obj = st_buffer_object(obj);
 148
 149    pipe->winsys->buffer_subdata(pipe->winsys, st_obj->buffer, offset, size, data);
 150 }
 151
 152
 153 /**
 154  * Called via glGetBufferSubDataARB().
 155  */
 156 static void
 157 st_bufferobj_get_subdata(GLcontext *ctx,
 158                          GLenum target,
 159                          GLintptrARB offset,
 160                          GLsizeiptrARB size,
 161                          GLvoid * data, struct gl_buffer_object *obj)
 162 {
 163    struct pipe_context *pipe = st_context(ctx)->pipe;
 164    struct st_buffer_object *st_obj = st_buffer_object(obj);
 165
 166    pipe->winsys->buffer_get_subdata(pipe->winsys, st_obj->buffer, offset, size, data);
 167 }
 168
 169
 170 /**
 171  * Called via glMapBufferARB().
 172  */
 173 static void *
 174 st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
 175                  struct gl_buffer_object *obj)
 176 {
 177    struct pipe_context *pipe = st_context(ctx)->pipe;
 178    struct st_buffer_object *st_obj = st_buffer_object(obj);
 179    GLuint flags;
 180
 181    switch (access) {
 182    case GL_WRITE_ONLY:
 183       flags = PIPE_BUFFER_FLAG_WRITE;
 184       break;
 185    case GL_READ_ONLY:
 186       flags = PIPE_BUFFER_FLAG_READ;
 187       break;
 188    case GL_READ_WRITE:
 189       /* fall-through */
 190    default:
 191       flags = PIPE_BUFFER_FLAG_READ | PIPE_BUFFER_FLAG_WRITE;
 192       break;
 193    }
 194
 195    obj->Pointer = pipe->winsys->buffer_map(pipe->winsys, st_obj->buffer, flags);
 196    return obj->Pointer;
 197 }
 198
 199
 200 /**
 201  * Called via glMapBufferARB().
 202  */
 203 static GLboolean
 204 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
 205 {
 206    struct pipe_context *pipe = st_context(ctx)->pipe;
 207    struct st_buffer_object *st_obj = st_buffer_object(obj);
 208
 209    pipe->winsys->buffer_unmap(pipe->winsys, st_obj->buffer);
 210    obj->Pointer = NULL;
 211    return GL_TRUE;
 212 }
 213
 214
 215 void
 216 st_init_bufferobject_functions(struct dd_function_table *functions)
 217 {
 218    functions->NewBufferObject = st_bufferobj_alloc;
 219    functions->DeleteBuffer = st_bufferobj_free;
 220    functions->BufferData = st_bufferobj_data;
 221    functions->BufferSubData = st_bufferobj_subdata;
 222    functions->GetBufferSubData = st_bufferobj_get_subdata;
 223    functions->MapBuffer = st_bufferobj_map;
 224    functions->UnmapBuffer = st_bufferobj_unmap;
 225 }