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    if (offset >= st_obj->size || size > (st_obj->size - offset))
 102       return;
 103
 104    st_cond_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer,
 105                                    offset, size, data);
 106 }
 107
 108
 109 /**
 110  * Called via glGetBufferSubDataARB().
 111  */
 112 static void
 113 st_bufferobj_get_subdata(GLcontext *ctx,
 114                          GLenum target,
 115                          GLintptrARB offset,
 116                          GLsizeiptrARB size,
 117                          GLvoid * data, struct gl_buffer_object *obj)
 118 {
 119    struct st_buffer_object *st_obj = st_buffer_object(obj);
 120
 121    if (offset >= st_obj->size || size > (st_obj->size - offset))
 122       return;
 123
 124    st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
 125                                   offset, size, data);
 126 }
 127
 128
 129 /**
 130  * Allocate space for and store data in a buffer object.  Any data that was
 131  * previously stored in the buffer object is lost.  If data is NULL,
 132  * memory will be allocated, but no copy will occur.
 133  * Called via glBufferDataARB().
 134  */
 135 static void
 136 st_bufferobj_data(GLcontext *ctx,
 137                   GLenum target,
 138                   GLsizeiptrARB size,
 139                   const GLvoid * data,
 140                   GLenum usage,
 141                   struct gl_buffer_object *obj)
 142 {
 143    struct st_context *st = st_context(ctx);
 144    struct pipe_context *pipe = st->pipe;
 145    struct st_buffer_object *st_obj = st_buffer_object(obj);
 146    unsigned buffer_usage;
 147
 148    st_obj->Base.Size = size;
 149    st_obj->Base.Usage = usage;
 150
 151    switch(target) {
 152    case GL_PIXEL_PACK_BUFFER_ARB:
 153    case GL_PIXEL_UNPACK_BUFFER_ARB:
 154       buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
 155       break;
 156    case GL_ARRAY_BUFFER_ARB:
 157       buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
 158       break;
 159    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 160       buffer_usage = PIPE_BUFFER_USAGE_INDEX;
 161       break;
 162    default:
 163       buffer_usage = 0;
 164    }
 165
 166    pipe_buffer_reference( &st_obj->buffer, NULL );
 167
 168    st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
 169
 170    if (!st_obj->buffer) {
 171       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB");
 172       return;
 173    }
 174
 175    st_obj->size = size;
 176
 177    if (data)
 178       st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
 179                                     size, data);
 180 }
 181
 182
 183 /**
 184  * Called via glMapBufferARB().
 185  */
 186 static void *
 187 st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
 188                  struct gl_buffer_object *obj)
 189 {
 190    struct st_buffer_object *st_obj = st_buffer_object(obj);
 191    uint flags;
 192
 193    switch (access) {
 194    case GL_WRITE_ONLY:
 195       flags = PIPE_BUFFER_USAGE_CPU_WRITE;
 196       break;
 197    case GL_READ_ONLY:
 198       flags = PIPE_BUFFER_USAGE_CPU_READ;
 199       break;
 200    case GL_READ_WRITE:
 201       /* fall-through */
 202    default:
 203       flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
 204       break;
 205    }
 206
 207    obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
 208                                                 st_obj->buffer,
 209                                                 flags);
 210    if (obj->Pointer) {
 211       obj->Offset = 0;
 212       obj->Length = obj->Size;
 213    }
 214    return obj->Pointer;
 215 }
 216
 217
 218 /**
 219  * Called via glMapBufferRange().
 220  */
 221 static void *
 222 st_bufferobj_map_range(GLcontext *ctx, GLenum target,
 223                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 224                        struct gl_buffer_object *obj)
 225 {
 226    struct pipe_context *pipe = st_context(ctx)->pipe;
 227    struct st_buffer_object *st_obj = st_buffer_object(obj);
 228    uint flags = 0x0;
 229    char *map;
 230
 231    if (access & GL_MAP_WRITE_BIT)
 232       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 233
 234    if (access & GL_MAP_READ_BIT)
 235       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 236
 237    /* ... other flags ...
 238     */
 239
 240    if (access & MESA_MAP_NOWAIT_BIT)
 241       flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
 242
 243    assert(offset >= 0);
 244    assert(length >= 0);
 245    assert(offset < obj->Size);
 246    assert(offset + length <= obj->Size);
 247
 248    map = obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
 249    if(obj->Pointer) {
 250       obj->Offset = offset;
 251       obj->Length = length;
 252       map += offset;
 253    }
 254
 255    return map;
 256 }
 257
 258
 259 static void
 260 st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
 261                                 GLintptr offset, GLsizeiptr length,
 262                                 struct gl_buffer_object *obj)
 263 {
 264    struct pipe_context *pipe = st_context(ctx)->pipe;
 265    struct st_buffer_object *st_obj = st_buffer_object(obj);
 266
 267    /* Subrange is relative to mapped range */
 268    assert(offset >= 0);
 269    assert(length >= 0);
 270    assert(offset + length <= obj->Length);
 271
 272    pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
 273                                   obj->Offset + offset, length);
 274 }
 275
 276
 277 /**
 278  * Called via glUnmapBufferARB().
 279  */
 280 static GLboolean
 281 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
 282 {
 283    struct pipe_context *pipe = st_context(ctx)->pipe;
 284    struct st_buffer_object *st_obj = st_buffer_object(obj);
 285
 286    pipe_buffer_unmap(pipe->screen, st_obj->buffer);
 287    obj->Pointer = NULL;
 288    obj->Offset = 0;
 289    obj->Length = 0;
 290    return GL_TRUE;
 291 }
 292
 293
 294 /**
 295  * Called via glCopyBufferSubData().
 296  */
 297 static void
 298 st_copy_buffer_subdata(GLcontext *ctx,
 299                        struct gl_buffer_object *src,
 300                        struct gl_buffer_object *dst,
 301                        GLintptr readOffset, GLintptr writeOffset,
 302                        GLsizeiptr size)
 303 {
 304    struct pipe_context *pipe = st_context(ctx)->pipe;
 305    struct st_buffer_object *srcObj = st_buffer_object(src);
 306    struct st_buffer_object *dstObj = st_buffer_object(dst);
 307    ubyte *srcPtr, *dstPtr;
 308
 309    /* buffer should not already be mapped */
 310    assert(!src->Pointer);
 311    assert(!dst->Pointer);
 312
 313    srcPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
 314                                             srcObj->buffer,
 315                                             readOffset, size,
 316                                             PIPE_BUFFER_USAGE_CPU_READ);
 317
 318    dstPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
 319                                             dstObj->buffer,
 320                                             writeOffset, size,
 321                                             PIPE_BUFFER_USAGE_CPU_WRITE);
 322
 323    if (srcPtr && dstPtr)
 324       _mesa_memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
 325
 326    pipe_buffer_unmap(pipe->screen, srcObj->buffer);
 327    pipe_buffer_unmap(pipe->screen, dstObj->buffer);
 328 }
 329
 330
 331 void
 332 st_init_bufferobject_functions(struct dd_function_table *functions)
 333 {
 334    functions->NewBufferObject = st_bufferobj_alloc;
 335    functions->DeleteBuffer = st_bufferobj_free;
 336    functions->BufferData = st_bufferobj_data;
 337    functions->BufferSubData = st_bufferobj_subdata;
 338    functions->GetBufferSubData = st_bufferobj_get_subdata;
 339    functions->MapBuffer = st_bufferobj_map;
 340    functions->MapBufferRange = st_bufferobj_map_range;
 341    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 342    functions->UnmapBuffer = st_bufferobj_unmap;
 343    functions->CopyBufferSubData = st_copy_buffer_subdata;
 344
 345    /* For GL_APPLE_vertex_array_object */
 346    functions->NewArrayObject = _mesa_new_array_object;
 347    functions->DeleteArrayObject = _mesa_delete_array_object;
 348 }