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 glBufferDataARB().
 138  */
 139 static void
 140 st_bufferobj_data(GLcontext *ctx,
 141                   GLenum target,
 142                   GLsizeiptrARB size,
 143                   const GLvoid * data,
 144                   GLenum usage,
 145                   struct gl_buffer_object *obj)
 146 {
 147    struct st_context *st = st_context(ctx);
 148    struct pipe_context *pipe = st->pipe;
 149    struct st_buffer_object *st_obj = st_buffer_object(obj);
 150    unsigned buffer_usage;
 151
 152    st_obj->Base.Size = size;
 153    st_obj->Base.Usage = usage;
 154
 155    switch(target) {
 156    case GL_PIXEL_PACK_BUFFER_ARB:
 157    case GL_PIXEL_UNPACK_BUFFER_ARB:
 158       buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
 159       break;
 160    case GL_ARRAY_BUFFER_ARB:
 161       buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
 162       break;
 163    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 164       buffer_usage = PIPE_BUFFER_USAGE_INDEX;
 165       break;
 166    default:
 167       buffer_usage = 0;
 168    }
 169
 170    pipe_buffer_reference( &st_obj->buffer, NULL );
 171
 172    st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
 173
 174    if (!st_obj->buffer) {
 175       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB");
 176       return;
 177    }
 178
 179    if (data)
 180       st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
 181                                     size, data);
 182 }
 183
 184
 185 /**
 186  * Called via glMapBufferARB().
 187  */
 188 static void *
 189 st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
 190                  struct gl_buffer_object *obj)
 191 {
 192    struct st_buffer_object *st_obj = st_buffer_object(obj);
 193    uint flags;
 194
 195    switch (access) {
 196    case GL_WRITE_ONLY:
 197       flags = PIPE_BUFFER_USAGE_CPU_WRITE;
 198       break;
 199    case GL_READ_ONLY:
 200       flags = PIPE_BUFFER_USAGE_CPU_READ;
 201       break;
 202    case GL_READ_WRITE:
 203       /* fall-through */
 204    default:
 205       flags = PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE;
 206       break;
 207    }
 208
 209    obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
 210                                                 st_obj->buffer,
 211                                                 flags);
 212    if (obj->Pointer) {
 213       obj->Offset = 0;
 214       obj->Length = obj->Size;
 215    }
 216    return obj->Pointer;
 217 }
 218
 219
 220 /**
 221  * Called via glMapBufferRange().
 222  */
 223 static void *
 224 st_bufferobj_map_range(GLcontext *ctx, GLenum target,
 225                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 226                        struct gl_buffer_object *obj)
 227 {
 228    struct pipe_context *pipe = st_context(ctx)->pipe;
 229    struct st_buffer_object *st_obj = st_buffer_object(obj);
 230    uint flags = 0x0;
 231    char *map;
 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    /* ... other flags ...
 240     */
 241
 242    if (access & MESA_MAP_NOWAIT_BIT)
 243       flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
 244
 245    assert(offset >= 0);
 246    assert(length >= 0);
 247    assert(offset < obj->Size);
 248    assert(offset + length <= obj->Size);
 249
 250    map = obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
 251    if(obj->Pointer) {
 252       obj->Offset = offset;
 253       obj->Length = length;
 254       map += offset;
 255    }
 256
 257    return map;
 258 }
 259
 260
 261 static void
 262 st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
 263                                 GLintptr offset, GLsizeiptr length,
 264                                 struct gl_buffer_object *obj)
 265 {
 266    struct pipe_context *pipe = st_context(ctx)->pipe;
 267    struct st_buffer_object *st_obj = st_buffer_object(obj);
 268
 269    /* Subrange is relative to mapped range */
 270    assert(offset >= 0);
 271    assert(length >= 0);
 272    assert(offset + length <= obj->Length);
 273
 274    pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
 275                                   obj->Offset + offset, length);
 276 }
 277
 278
 279 /**
 280  * Called via glUnmapBufferARB().
 281  */
 282 static GLboolean
 283 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
 284 {
 285    struct pipe_context *pipe = st_context(ctx)->pipe;
 286    struct st_buffer_object *st_obj = st_buffer_object(obj);
 287
 288    pipe_buffer_unmap(pipe->screen, st_obj->buffer);
 289    obj->Pointer = NULL;
 290    obj->Offset = 0;
 291    obj->Length = 0;
 292    return GL_TRUE;
 293 }
 294
 295
 296 /**
 297  * Called via glCopyBufferSubData().
 298  */
 299 static void
 300 st_copy_buffer_subdata(GLcontext *ctx,
 301                        struct gl_buffer_object *src,
 302                        struct gl_buffer_object *dst,
 303                        GLintptr readOffset, GLintptr writeOffset,
 304                        GLsizeiptr size)
 305 {
 306    struct pipe_context *pipe = st_context(ctx)->pipe;
 307    struct st_buffer_object *srcObj = st_buffer_object(src);
 308    struct st_buffer_object *dstObj = st_buffer_object(dst);
 309    ubyte *srcPtr, *dstPtr;
 310
 311    /* buffer should not already be mapped */
 312    assert(!src->Pointer);
 313    assert(!dst->Pointer);
 314
 315    srcPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
 316                                             srcObj->buffer,
 317                                             readOffset, size,
 318                                             PIPE_BUFFER_USAGE_CPU_READ);
 319
 320    dstPtr = (ubyte *) pipe_buffer_map_range(pipe->screen,
 321                                             dstObj->buffer,
 322                                             writeOffset, size,
 323                                             PIPE_BUFFER_USAGE_CPU_WRITE);
 324
 325    if (srcPtr && dstPtr)
 326       _mesa_memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
 327
 328    pipe_buffer_unmap(pipe->screen, srcObj->buffer);
 329    pipe_buffer_unmap(pipe->screen, dstObj->buffer);
 330 }
 331
 332
 333 void
 334 st_init_bufferobject_functions(struct dd_function_table *functions)
 335 {
 336    functions->NewBufferObject = st_bufferobj_alloc;
 337    functions->DeleteBuffer = st_bufferobj_free;
 338    functions->BufferData = st_bufferobj_data;
 339    functions->BufferSubData = st_bufferobj_subdata;
 340    functions->GetBufferSubData = st_bufferobj_get_subdata;
 341    functions->MapBuffer = st_bufferobj_map;
 342    functions->MapBufferRange = st_bufferobj_map_range;
 343    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 344    functions->UnmapBuffer = st_bufferobj_unmap;
 345    functions->CopyBufferSubData = st_copy_buffer_subdata;
 346
 347    /* For GL_APPLE_vertex_array_object */
 348    functions->NewArrayObject = _mesa_new_array_object;
 349    functions->DeleteArrayObject = _mesa_delete_array_object;
 350 }