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_inlines.h"
  34 #include "st_context.h"
  35 #include "st_cb_bufferobjects.h"
  36
  37 #include "pipe/p_context.h"
  38 #include "pipe/p_defines.h"
  39 #include "pipe/p_inlines.h"
  40
  41
  42
  43 /* Pixel buffers and Vertex/index buffers are handled through these
  44  * mesa callbacks.  Framebuffer/Renderbuffer objects are
  45  * created/managed elsewhere.
  46  */
  47
  48
  49
  50 /**
  51  * There is some duplication between mesa's bufferobjects and our
  52  * bufmgr buffers.  Both have an integer handle and a hashtable to
  53  * lookup an opaque structure.  It would be nice if the handles and
  54  * internal structure where somehow shared.
  55  */
  56 static struct gl_buffer_object *
  57 st_bufferobj_alloc(GLcontext *ctx, GLuint name, GLenum target)
  58 {
  59    struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
  60
  61    if (!st_obj)
  62       return NULL;
  63
  64    _mesa_initialize_buffer_object(&st_obj->Base, name, target);
  65
  66    return &st_obj->Base;
  67 }
  68
  69
  70
  71 /**
  72  * Deallocate/free a vertex/pixel buffer object.
  73  * Called via glDeleteBuffersARB().
  74  */
  75 static void
  76 st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
  77 {
  78    struct st_buffer_object *st_obj = st_buffer_object(obj);
  79
  80    if (st_obj->buffer)
  81       pipe_buffer_reference(&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 st_buffer_object *st_obj = st_buffer_object(obj);
 102
 103    if (offset >= st_obj->size || size > (st_obj->size - offset))
 104       return;
 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    if (offset >= st_obj->size || size > (st_obj->size - offset))
 124       return;
 125
 126    st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
 127                                   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( &st_obj->buffer, NULL );
 169
 170    st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
 171
 172    if (!st_obj->buffer) {
 173       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB");
 174       return;
 175    }
 176
 177    st_obj->size = size;
 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    GLuint 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 /**
 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    GLuint flags = 0;
 232    char *map;
 233
 234    if (access & GL_MAP_WRITE_BIT)
 235       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 236
 237    if (access & GL_MAP_READ_BIT)
 238       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 239
 240    /* ... other flags ...
 241     */
 242
 243    if (access & MESA_MAP_NOWAIT_BIT)
 244       flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
 245
 246    assert(offset >= 0);
 247    assert(length >= 0);
 248    assert(offset < obj->Size);
 249    assert(offset + length <= obj->Size);
 250
 251    map = obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
 252    if(obj->Pointer) {
 253       obj->Offset = 0;
 254       obj->Length = obj->Size;
 255       map += offset;
 256    }
 257
 258    return map;
 259 }
 260
 261
 262 static void
 263 st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
 264                                 GLintptr offset, GLsizeiptr length,
 265                                 struct gl_buffer_object *obj)
 266 {
 267    struct pipe_context *pipe = st_context(ctx)->pipe;
 268    struct st_buffer_object *st_obj = st_buffer_object(obj);
 269
 270    /* Subrange is relative to mapped range */
 271    assert(offset >= 0);
 272    assert(length >= 0);
 273    assert(offset < obj->Length);
 274    assert(offset + length <= obj->Length);
 275
 276    pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
 277                                   obj->Offset + offset, length);
 278 }
 279
 280
 281 /**
 282  * Called via glUnmapBufferARB().
 283  */
 284 static GLboolean
 285 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
 286 {
 287    struct pipe_context *pipe = st_context(ctx)->pipe;
 288    struct st_buffer_object *st_obj = st_buffer_object(obj);
 289
 290    pipe_buffer_unmap(pipe->screen, st_obj->buffer);
 291    obj->Pointer = NULL;
 292    obj->Offset = 0;
 293    obj->Length = 0;
 294    return GL_TRUE;
 295 }
 296
 297
 298 void
 299 st_init_bufferobject_functions(struct dd_function_table *functions)
 300 {
 301    functions->NewBufferObject = st_bufferobj_alloc;
 302    functions->DeleteBuffer = st_bufferobj_free;
 303    functions->BufferData = st_bufferobj_data;
 304    functions->BufferSubData = st_bufferobj_subdata;
 305    functions->GetBufferSubData = st_bufferobj_get_subdata;
 306    functions->MapBuffer = st_bufferobj_map;
 307    functions->MapBufferRange = st_bufferobj_map_range;
 308    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 309    functions->UnmapBuffer = st_bufferobj_unmap;
 310 }