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_inlines.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_buffer_object *st_obj = ST_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    return &st_obj->Base;
  66 }
  67
  68
  69
  70 /**
  71  * Deallocate/free a vertex/pixel buffer object.
  72  * Called via glDeleteBuffersARB().
  73  */
  74 static void
  75 st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
  76 {
  77    struct pipe_context *pipe = st_context(ctx)->pipe;
  78    struct st_buffer_object *st_obj = st_buffer_object(obj);
  79
  80    if (st_obj->buffer)
  81       pipe_buffer_reference(pipe->screen, &st_obj->buffer, NULL);
  82
  83    _mesa_free(st_obj);
  84 }
  85
  86
  87
  88 /**
  89  * Replace data in a subrange of buffer object.  If the data range
  90  * specified by size + offset extends beyond the end of the buffer or
  91  * if data is NULL, no copy is performed.
  92  * Called via glBufferSubDataARB().
  93  */
  94 static void
  95 st_bufferobj_subdata(GLcontext *ctx,
  96                      GLenum target,
  97                      GLintptrARB offset,
  98                      GLsizeiptrARB size,
  99                      const GLvoid * data, struct gl_buffer_object *obj)
 100 {
 101    struct pipe_context *pipe = st_context(ctx)->pipe;
 102    struct st_buffer_object *st_obj = st_buffer_object(obj);
 103
 104    if (offset >= st_obj->size || size > (st_obj->size - offset))
 105       return;
 106
 107    pipe_buffer_write(pipe->screen, st_obj->buffer, offset, size, data);
 108 }
 109
 110
 111 /**
 112  * Called via glGetBufferSubDataARB().
 113  */
 114 static void
 115 st_bufferobj_get_subdata(GLcontext *ctx,
 116                          GLenum target,
 117                          GLintptrARB offset,
 118                          GLsizeiptrARB size,
 119                          GLvoid * data, struct gl_buffer_object *obj)
 120 {
 121    struct pipe_context *pipe = st_context(ctx)->pipe;
 122    struct st_buffer_object *st_obj = st_buffer_object(obj);
 123
 124    if (offset >= st_obj->size || size > (st_obj->size - offset))
 125       return;
 126
 127    pipe_buffer_read(pipe->screen, st_obj->buffer, offset, size, data);
 128 }
 129
 130
 131 /**
 132  * Allocate space for and store data in a buffer object.  Any data that was
 133  * previously stored in the buffer object is lost.  If data is NULL,
 134  * memory will be allocated, but no copy will occur.
 135  * Called via glBufferDataARB().
 136  */
 137 static void
 138 st_bufferobj_data(GLcontext *ctx,
 139                   GLenum target,
 140                   GLsizeiptrARB size,
 141                   const GLvoid * data,
 142                   GLenum usage,
 143                   struct gl_buffer_object *obj)
 144 {
 145    struct st_context *st = st_context(ctx);
 146    struct pipe_context *pipe = st->pipe;
 147    struct st_buffer_object *st_obj = st_buffer_object(obj);
 148    unsigned buffer_usage;
 149
 150    st_obj->Base.Size = size;
 151    st_obj->Base.Usage = usage;
 152
 153    switch(target) {
 154    case GL_PIXEL_PACK_BUFFER_ARB:
 155    case GL_PIXEL_UNPACK_BUFFER_ARB:
 156       buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
 157       break;
 158    case GL_ARRAY_BUFFER_ARB:
 159       buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
 160       break;
 161    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 162       buffer_usage = PIPE_BUFFER_USAGE_INDEX;
 163       break;
 164    default:
 165       buffer_usage = 0;
 166    }
 167
 168    pipe_buffer_reference( pipe->screen, &st_obj->buffer, NULL );
 169
 170    st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
 171
 172    st_obj->size = size;
 173
 174    if (data)
 175       st_bufferobj_subdata(ctx, target, 0, size, data, obj);
 176 }
 177
 178
 179 /**
 180  * Called via glMapBufferARB().
 181  */
 182 static void *
 183 st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
 184                  struct gl_buffer_object *obj)
 185 {
 186    struct pipe_context *pipe = st_context(ctx)->pipe;
 187    struct st_buffer_object *st_obj = st_buffer_object(obj);
 188    GLuint flags;
 189
 190    switch (access) {
 191    case GL_WRITE_ONLY:
 192       flags = PIPE_BUFFER_USAGE_CPU_WRITE;
 193       break;
 194    case GL_READ_ONLY:
 195       flags = PIPE_BUFFER_USAGE_CPU_READ;
 196       break;
 197    case GL_READ_WRITE:
 198       /* fall-through */
 199    default:
 200       flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
 201       break;
 202    }
 203
 204    obj->Pointer = pipe_buffer_map(pipe->screen, st_obj->buffer, flags);
 205    return obj->Pointer;
 206 }
 207
 208
 209
 210 /**
 211  * Called via glMapBufferRange().
 212  */
 213 static void *
 214 st_bufferobj_map_range(GLcontext *ctx, GLenum target,
 215                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 216                        struct gl_buffer_object *obj)
 217 {
 218    struct pipe_context *pipe = st_context(ctx)->pipe;
 219    struct st_buffer_object *st_obj = st_buffer_object(obj);
 220    GLuint flags = 0;
 221
 222    if (access & GL_MAP_WRITE_BIT)
 223       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 224
 225    if (access & GL_MAP_READ_BIT)
 226       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 227
 228    /* ... other flags ...
 229     */
 230
 231    if (access & MESA_MAP_NOWAIT_BIT)
 232       flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
 233
 234    obj->Pointer = pipe_buffer_map(pipe->screen, st_obj->buffer, flags);
 235    return obj->Pointer;
 236 }
 237
 238
 239
 240
 241 /**
 242  * Called via glUnmapBufferARB().
 243  */
 244 static GLboolean
 245 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
 246 {
 247    struct pipe_context *pipe = st_context(ctx)->pipe;
 248    struct st_buffer_object *st_obj = st_buffer_object(obj);
 249
 250    pipe_buffer_unmap(pipe->screen, st_obj->buffer);
 251    obj->Pointer = NULL;
 252    return GL_TRUE;
 253 }
 254
 255
 256 void
 257 st_init_bufferobject_functions(struct dd_function_table *functions)
 258 {
 259    functions->NewBufferObject = st_bufferobj_alloc;
 260    functions->DeleteBuffer = st_bufferobj_free;
 261    functions->BufferData = st_bufferobj_data;
 262    functions->BufferSubData = st_bufferobj_subdata;
 263    functions->GetBufferSubData = st_bufferobj_get_subdata;
 264    functions->MapBuffer = st_bufferobj_map;
 265    functions->MapBufferRange = st_bufferobj_map_range;
 266    functions->UnmapBuffer = st_bufferobj_unmap;
 267 }