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