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 "pipe/p_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    if (st_obj->buffer)
  79       pipe_buffer_reference(&st_obj->buffer, NULL);
  80
  81    _mesa_free(st_obj);
  82 }
  83
  84
  85
  86 /**
  87  * Replace data in a subrange of buffer object.  If the data range
  88  * specified by size + offset extends beyond the end of the buffer or
  89  * if data is NULL, no copy is performed.
  90  * Called via glBufferSubDataARB().
  91  */
  92 static void
  93 st_bufferobj_subdata(GLcontext *ctx,
  94                      GLenum target,
  95                      GLintptrARB offset,
  96                      GLsizeiptrARB size,
  97                      const GLvoid * data, struct gl_buffer_object *obj)
  98 {
  99    struct st_buffer_object *st_obj = st_buffer_object(obj);
 100
 101    /* we may be called from VBO code, so double-check params here */
 102    ASSERT(offset >= 0);
 103    ASSERT(size >= 0);
 104    ASSERT(offset + size <= obj->Size);
 105
 106    st_cond_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer,
 107                                    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 st_buffer_object *st_obj = st_buffer_object(obj);
 122
 123    /* we may be called from VBO code, so double-check params here */
 124    ASSERT(offset >= 0);
 125    ASSERT(size >= 0);
 126    ASSERT(offset + size <= obj->Size);
 127
 128    st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
 129                                   offset, size, data);
 130 }
 131
 132
 133 /**
 134  * Allocate space for and store data in a buffer object.  Any data that was
 135  * previously stored in the buffer object is lost.  If data is NULL,
 136  * memory will be allocated, but no copy will occur.
 137  * Called via ctx->Driver.BufferData().
 138  * \return GL_TRUE for success, GL_FALSE if out of memory
 139  */
 140 static GLboolean
 141 st_bufferobj_data(GLcontext *ctx,
 142                   GLenum target,
 143                   GLsizeiptrARB size,
 144                   const GLvoid * data,
 145                   GLenum usage,
 146                   struct gl_buffer_object *obj)
 147 {
 148    struct st_context *st = st_context(ctx);
 149    struct pipe_context *pipe = st->pipe;
 150    struct st_buffer_object *st_obj = st_buffer_object(obj);
 151    unsigned buffer_usage;
 152
 153    st_obj->Base.Size = size;
 154    st_obj->Base.Usage = usage;
 155
 156    switch(target) {
 157    case GL_PIXEL_PACK_BUFFER_ARB:
 158    case GL_PIXEL_UNPACK_BUFFER_ARB:
 159       buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
 160       break;
 161    case GL_ARRAY_BUFFER_ARB:
 162       buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
 163       break;
 164    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 165       buffer_usage = PIPE_BUFFER_USAGE_INDEX;
 166       break;
 167    default:
 168       buffer_usage = 0;
 169    }
 170
 171    pipe_buffer_reference( &st_obj->buffer, NULL );
 172
 173    st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
 174
 175    if (!st_obj->buffer) {
 176       return GL_FALSE;
 177    }
 178
 179    if (data)
 180       st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
 181                                     size, data);
 182    return GL_TRUE;
 183 }
 184
 185
 186 /**
 187  * Called via glMapBufferARB().
 188  */
 189 static void *
 190 st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
 191                  struct gl_buffer_object *obj)
 192 {
 193    struct st_buffer_object *st_obj = st_buffer_object(obj);
 194    uint flags;
 195
 196    switch (access) {
 197    case GL_WRITE_ONLY:
 198       flags = PIPE_BUFFER_USAGE_CPU_WRITE;
 199       break;
 200    case GL_READ_ONLY:
 201       flags = PIPE_BUFFER_USAGE_CPU_READ;
 202       break;
 203    case GL_READ_WRITE:
 204       /* fall-through */
 205    default:
 206       flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
 207       break;
 208    }
 209
 210    obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
 211                                                 st_obj->buffer,
 212                                                 flags);
 213    if (obj->Pointer) {
 214       obj->Offset = 0;
 215       obj->Length = obj->Size;
 216    }
 217    return obj->Pointer;
 218 }
 219
 220
 221 /**
 222  * Called via glMapBufferRange().
 223  */
 224 static void *
 225 st_bufferobj_map_range(GLcontext *ctx, GLenum target,
 226                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 227                        struct gl_buffer_object *obj)
 228 {
 229    struct pipe_context *pipe = st_context(ctx)->pipe;
 230    struct st_buffer_object *st_obj = st_buffer_object(obj);
 231    uint flags = 0x0;
 232
 233    if (access & GL_MAP_WRITE_BIT)
 234       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 235
 236    if (access & GL_MAP_READ_BIT)
 237       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 238
 239    if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
 240       flags |= PIPE_BUFFER_USAGE_FLUSH_EXPLICIT;
 241
 242    /* ... other flags ...
 243     */
 244
 245    if (access & MESA_MAP_NOWAIT_BIT)
 246       flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
 247
 248    assert(offset >= 0);
 249    assert(length >= 0);
 250    assert(offset < obj->Size);
 251    assert(offset + length <= obj->Size);
 252
 253    obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
 254    if (obj->Pointer) {
 255       obj->Pointer = (ubyte *) obj->Pointer + offset;
 256       obj->Offset = offset;
 257       obj->Length = length;
 258       obj->AccessFlags = access;
 259    }
 260
 261    return obj->Pointer;
 262 }
 263
 264
 265 static void
 266 st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
 267                                 GLintptr offset, GLsizeiptr length,
 268                                 struct gl_buffer_object *obj)
 269 {
 270    struct pipe_context *pipe = st_context(ctx)->pipe;
 271    struct st_buffer_object *st_obj = st_buffer_object(obj);
 272
 273    /* Subrange is relative to mapped range */
 274    assert(offset >= 0);
 275    assert(length >= 0);
 276    assert(offset + length <= obj->Length);
 277
 278    pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
 279                                   obj->Offset + offset, length);
 280 }
 281
 282
 283 /**
 284  * Called via glUnmapBufferARB().
 285  */
 286 static GLboolean
 287 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
 288 {
 289    struct pipe_context *pipe = st_context(ctx)->pipe;
 290    struct st_buffer_object *st_obj = st_buffer_object(obj);
 291
 292    pipe_buffer_unmap(pipe->screen, st_obj->buffer);
 293    obj->Pointer = NULL;
 294    obj->Offset = 0;
 295    obj->Length = 0;
 296    return GL_TRUE;
 297 }
 298
 299
 300 /**
 301  * Called via glCopyBufferSubData().
 302  */
 303 static void
 304 st_copy_buffer_subdata(GLcontext *ctx,
 305                        struct gl_buffer_object *src,
 306                        struct gl_buffer_object *dst,
 307                        GLintptr readOffset, GLintptr writeOffset,
 308                        GLsizeiptr size)
 309 {
 310    struct pipe_context *pipe = st_context(ctx)->pipe;
 311    struct st_buffer_object *srcObj = st_buffer_object(src);
 312    struct st_buffer_object *dstObj = st_buffer_object(dst);
 313    ubyte *srcPtr, *dstPtr;
 314
 315    /* buffer should not already be mapped */
 316    assert(!src->Pointer);
 317    assert(!dst->Pointer);
 318
 319    srcPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
 320                                             srcObj->buffer,
 321                                             readOffset, size,
 322                                             PIPE_BUFFER_USAGE_CPU_READ);
 323
 324    dstPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
 325                                             dstObj->buffer,
 326                                             writeOffset, size,
 327                                             PIPE_BUFFER_USAGE_CPU_WRITE);
 328
 329    if (srcPtr && dstPtr)
 330       _mesa_memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
 331
 332    pipe_buffer_unmap(pipe->screen, srcObj->buffer);
 333    pipe_buffer_unmap(pipe->screen, dstObj->buffer);
 334 }
 335
 336
 337 void
 338 st_init_bufferobject_functions(struct dd_function_table *functions)
 339 {
 340    functions->NewBufferObject = st_bufferobj_alloc;
 341    functions->DeleteBuffer = st_bufferobj_free;
 342    functions->BufferData = st_bufferobj_data;
 343    functions->BufferSubData = st_bufferobj_subdata;
 344    functions->GetBufferSubData = st_bufferobj_get_subdata;
 345    functions->MapBuffer = st_bufferobj_map;
 346    functions->MapBufferRange = st_bufferobj_map_range;
 347    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 348    functions->UnmapBuffer = st_bufferobj_unmap;
 349    functions->CopyBufferSubData = st_copy_buffer_subdata;
 350
 351    /* For GL_APPLE_vertex_array_object */
 352    functions->NewArrayObject = _mesa_new_array_object;
 353    functions->DeleteArrayObject = _mesa_delete_array_object;
 354 }