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 /**
  30  * Functions for pixel buffer objects and vertex/element buffer objects.
  31  */
  32
  33
  34 #include "main/imports.h"
  35 #include "main/mtypes.h"
  36 #include "main/arrayobj.h"
  37 #include "main/bufferobj.h"
  38
  39 #include "st_inlines.h"
  40 #include "st_context.h"
  41 #include "st_cb_bufferobjects.h"
  42
  43 #include "pipe/p_context.h"
  44 #include "pipe/p_defines.h"
  45 #include "util/u_inlines.h"
  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_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
  58
  59    if (!st_obj)
  60       return NULL;
  61
  62    _mesa_initialize_buffer_object(&st_obj->Base, name, target);
  63
  64    return &st_obj->Base;
  65 }
  66
  67
  68
  69 /**
  70  * Deallocate/free a vertex/pixel buffer object.
  71  * Called via glDeleteBuffersARB().
  72  */
  73 static void
  74 st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
  75 {
  76    struct st_buffer_object *st_obj = st_buffer_object(obj);
  77
  78    assert(obj->RefCount == 0);
  79
  80    if (st_obj->buffer)
  81       pipe_buffer_reference(&st_obj->buffer, NULL);
  82
  83    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 st_buffer_object *st_obj = st_buffer_object(obj);
 102
 103    /* we may be called from VBO code, so double-check params here */
 104    ASSERT(offset >= 0);
 105    ASSERT(size >= 0);
 106    ASSERT(offset + size <= obj->Size);
 107
 108    if (!size)
 109       return;
 110
 111    /*
 112     * According to ARB_vertex_buffer_object specification, if data is null,
 113     * then the contents of the buffer object's data store is undefined. We just
 114     * ignore, and leave it unchanged.
 115     */
 116    if (!data)
 117       return;
 118
 119    st_cond_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer,
 120                                    offset, size, data);
 121 }
 122
 123
 124 /**
 125  * Called via glGetBufferSubDataARB().
 126  */
 127 static void
 128 st_bufferobj_get_subdata(GLcontext *ctx,
 129                          GLenum target,
 130                          GLintptrARB offset,
 131                          GLsizeiptrARB size,
 132                          GLvoid * data, struct gl_buffer_object *obj)
 133 {
 134    struct st_buffer_object *st_obj = st_buffer_object(obj);
 135
 136    /* we may be called from VBO code, so double-check params here */
 137    ASSERT(offset >= 0);
 138    ASSERT(size >= 0);
 139    ASSERT(offset + size <= obj->Size);
 140
 141    if (!size)
 142       return;
 143
 144    st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
 145                                   offset, size, data);
 146 }
 147
 148
 149 /**
 150  * Allocate space for and store data in a buffer object.  Any data that was
 151  * previously stored in the buffer object is lost.  If data is NULL,
 152  * memory will be allocated, but no copy will occur.
 153  * Called via ctx->Driver.BufferData().
 154  * \return GL_TRUE for success, GL_FALSE if out of memory
 155  */
 156 static GLboolean
 157 st_bufferobj_data(GLcontext *ctx,
 158                   GLenum target,
 159                   GLsizeiptrARB size,
 160                   const GLvoid * data,
 161                   GLenum usage,
 162                   struct gl_buffer_object *obj)
 163 {
 164    struct st_context *st = st_context(ctx);
 165    struct pipe_context *pipe = st->pipe;
 166    struct st_buffer_object *st_obj = st_buffer_object(obj);
 167    unsigned buffer_usage;
 168
 169    st_obj->Base.Size = size;
 170    st_obj->Base.Usage = usage;
 171
 172    switch(target) {
 173    case GL_PIXEL_PACK_BUFFER_ARB:
 174    case GL_PIXEL_UNPACK_BUFFER_ARB:
 175       buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
 176       break;
 177    case GL_ARRAY_BUFFER_ARB:
 178       buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
 179       break;
 180    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 181       buffer_usage = PIPE_BUFFER_USAGE_INDEX;
 182       break;
 183    default:
 184       buffer_usage = 0;
 185    }
 186
 187    pipe_buffer_reference( &st_obj->buffer, NULL );
 188
 189    if (size != 0) {
 190       st_obj->buffer = pipe_buffer_create(pipe->screen, 32, buffer_usage, size);
 191
 192       if (!st_obj->buffer) {
 193          return GL_FALSE;
 194       }
 195
 196       if (data)
 197          st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
 198                                        size, data);
 199       return GL_TRUE;
 200    }
 201
 202    return GL_TRUE;
 203 }
 204
 205
 206 /**
 207  * Called via glMapBufferARB().
 208  */
 209 static void *
 210 st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
 211                  struct gl_buffer_object *obj)
 212 {
 213    struct st_buffer_object *st_obj = st_buffer_object(obj);
 214    uint flags;
 215
 216    switch (access) {
 217    case GL_WRITE_ONLY:
 218       flags = PIPE_BUFFER_USAGE_CPU_WRITE;
 219       break;
 220    case GL_READ_ONLY:
 221       flags = PIPE_BUFFER_USAGE_CPU_READ;
 222       break;
 223    case GL_READ_WRITE:
 224       /* fall-through */
 225    default:
 226       flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
 227       break;
 228    }
 229
 230    obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
 231                                                 st_obj->buffer,
 232                                                 flags);
 233    if (obj->Pointer) {
 234       obj->Offset = 0;
 235       obj->Length = obj->Size;
 236    }
 237    return obj->Pointer;
 238 }
 239
 240
 241 /**
 242  * Dummy data whose's pointer is used for zero length ranges.
 243  */
 244 static long
 245 st_bufferobj_zero_length_range = 0;
 246
 247
 248 /**
 249  * Called via glMapBufferRange().
 250  */
 251 static void *
 252 st_bufferobj_map_range(GLcontext *ctx, GLenum target,
 253                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 254                        struct gl_buffer_object *obj)
 255 {
 256    struct pipe_context *pipe = st_context(ctx)->pipe;
 257    struct st_buffer_object *st_obj = st_buffer_object(obj);
 258    uint flags = 0x0;
 259
 260    if (access & GL_MAP_WRITE_BIT)
 261       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 262
 263    if (access & GL_MAP_READ_BIT)
 264       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 265
 266    if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
 267       flags |= PIPE_BUFFER_USAGE_FLUSH_EXPLICIT;
 268
 269    if (access & GL_MAP_UNSYNCHRONIZED_BIT)
 270       flags |= PIPE_BUFFER_USAGE_UNSYNCHRONIZED;
 271
 272    /* ... other flags ...
 273     */
 274
 275    if (access & MESA_MAP_NOWAIT_BIT)
 276       flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
 277
 278    assert(offset >= 0);
 279    assert(length >= 0);
 280    assert(offset < obj->Size);
 281    assert(offset + length <= obj->Size);
 282
 283    /*
 284     * We go out of way here to hide the degenerate yet valid case of zero
 285     * length range from the pipe driver.
 286     */
 287    if (!length) {
 288       obj->Pointer = &st_bufferobj_zero_length_range;
 289    }
 290    else {
 291       obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
 292       if (obj->Pointer) {
 293          obj->Pointer = (ubyte *) obj->Pointer + offset;
 294       }
 295    }
 296
 297    if (obj->Pointer) {
 298       obj->Offset = offset;
 299       obj->Length = length;
 300       obj->AccessFlags = access;
 301    }
 302
 303    return obj->Pointer;
 304 }
 305
 306
 307 static void
 308 st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
 309                                 GLintptr offset, GLsizeiptr length,
 310                                 struct gl_buffer_object *obj)
 311 {
 312    struct pipe_context *pipe = st_context(ctx)->pipe;
 313    struct st_buffer_object *st_obj = st_buffer_object(obj);
 314
 315    /* Subrange is relative to mapped range */
 316    assert(offset >= 0);
 317    assert(length >= 0);
 318    assert(offset + length <= obj->Length);
 319
 320    if (!length)
 321       return;
 322
 323    pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
 324                                   obj->Offset + offset, length);
 325 }
 326
 327
 328 /**
 329  * Called via glUnmapBufferARB().
 330  */
 331 static GLboolean
 332 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
 333 {
 334    struct pipe_context *pipe = st_context(ctx)->pipe;
 335    struct st_buffer_object *st_obj = st_buffer_object(obj);
 336
 337    if(obj->Length)
 338       pipe_buffer_unmap(pipe->screen, st_obj->buffer);
 339
 340    obj->Pointer = NULL;
 341    obj->Offset = 0;
 342    obj->Length = 0;
 343    return GL_TRUE;
 344 }
 345
 346
 347 /**
 348  * Called via glCopyBufferSubData().
 349  */
 350 static void
 351 st_copy_buffer_subdata(GLcontext *ctx,
 352                        struct gl_buffer_object *src,
 353                        struct gl_buffer_object *dst,
 354                        GLintptr readOffset, GLintptr writeOffset,
 355                        GLsizeiptr size)
 356 {
 357    struct pipe_context *pipe = st_context(ctx)->pipe;
 358    struct st_buffer_object *srcObj = st_buffer_object(src);
 359    struct st_buffer_object *dstObj = st_buffer_object(dst);
 360    ubyte *srcPtr, *dstPtr;
 361
 362    if(!size)
 363       return;
 364
 365    /* buffer should not already be mapped */
 366    assert(!src->Pointer);
 367    assert(!dst->Pointer);
 368
 369    srcPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
 370                                             srcObj->buffer,
 371                                             readOffset, size,
 372                                             PIPE_BUFFER_USAGE_CPU_READ);
 373
 374    dstPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
 375                                             dstObj->buffer,
 376                                             writeOffset, size,
 377                                             PIPE_BUFFER_USAGE_CPU_WRITE);
 378
 379    if (srcPtr && dstPtr)
 380       memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
 381
 382    pipe_buffer_unmap(pipe->screen, srcObj->buffer);
 383    pipe_buffer_unmap(pipe->screen, dstObj->buffer);
 384 }
 385
 386
 387 void
 388 st_init_bufferobject_functions(struct dd_function_table *functions)
 389 {
 390    functions->NewBufferObject = st_bufferobj_alloc;
 391    functions->DeleteBuffer = st_bufferobj_free;
 392    functions->BufferData = st_bufferobj_data;
 393    functions->BufferSubData = st_bufferobj_subdata;
 394    functions->GetBufferSubData = st_bufferobj_get_subdata;
 395    functions->MapBuffer = st_bufferobj_map;
 396    functions->MapBufferRange = st_bufferobj_map_range;
 397    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 398    functions->UnmapBuffer = st_bufferobj_unmap;
 399    functions->CopyBufferSubData = st_copy_buffer_subdata;
 400
 401    /* For GL_APPLE_vertex_array_object */
 402    functions->NewArrayObject = _mesa_new_array_object;
 403    functions->DeleteArrayObject = _mesa_delete_array_object;
 404 }