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/arrayobj.h"
  32 #include "main/bufferobj.h"
  33
  34 #include "st_inlines.h"
  35 #include "st_context.h"
  36 #include "st_cb_bufferobjects.h"
  37
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_defines.h"
  40 #include "pipe/p_inlines.h"
  41
  42
  43
  44 /* Pixel buffers and Vertex/index buffers are handled through these
  45  * mesa callbacks.  Framebuffer/Renderbuffer objects are
  46  * created/managed elsewhere.
  47  */
  48
  49
  50
  51 /**
  52  * There is some duplication between mesa's bufferobjects and our
  53  * bufmgr buffers.  Both have an integer handle and a hashtable to
  54  * lookup an opaque structure.  It would be nice if the handles and
  55  * internal structure where somehow shared.
  56  */
  57 static struct gl_buffer_object *
  58 st_bufferobj_alloc(GLcontext *ctx, GLuint name, GLenum target)
  59 {
  60    struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
  61
  62    if (!st_obj)
  63       return NULL;
  64
  65    _mesa_initialize_buffer_object(&st_obj->Base, name, target);
  66
  67    return &st_obj->Base;
  68 }
  69
  70
  71
  72 /**
  73  * Deallocate/free a vertex/pixel buffer object.
  74  * Called via glDeleteBuffersARB().
  75  */
  76 static void
  77 st_bufferobj_free(GLcontext *ctx, struct gl_buffer_object *obj)
  78 {
  79    struct st_buffer_object *st_obj = st_buffer_object(obj);
  80
  81    if (st_obj->buffer)
  82       pipe_buffer_reference(&st_obj->buffer, NULL);
  83
  84    _mesa_free(st_obj);
  85 }
  86
  87
  88
  89 /**
  90  * Replace data in a subrange of buffer object.  If the data range
  91  * specified by size + offset extends beyond the end of the buffer or
  92  * if data is NULL, no copy is performed.
  93  * Called via glBufferSubDataARB().
  94  */
  95 static void
  96 st_bufferobj_subdata(GLcontext *ctx,
  97                      GLenum target,
  98                      GLintptrARB offset,
  99                      GLsizeiptrARB size,
 100                      const GLvoid * data, struct gl_buffer_object *obj)
 101 {
 102    struct st_buffer_object *st_obj = st_buffer_object(obj);
 103
 104    if (offset >= st_obj->size || size > (st_obj->size - offset))
 105       return;
 106
 107    st_cond_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer,
 108                                    offset, size, data);
 109 }
 110
 111
 112 /**
 113  * Called via glGetBufferSubDataARB().
 114  */
 115 static void
 116 st_bufferobj_get_subdata(GLcontext *ctx,
 117                          GLenum target,
 118                          GLintptrARB offset,
 119                          GLsizeiptrARB size,
 120                          GLvoid * data, struct gl_buffer_object *obj)
 121 {
 122    struct st_buffer_object *st_obj = st_buffer_object(obj);
 123
 124    if (offset >= st_obj->size || size > (st_obj->size - offset))
 125       return;
 126
 127    st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
 128                                   offset, size, data);
 129 }
 130
 131
 132 /**
 133  * Allocate space for and store data in a buffer object.  Any data that was
 134  * previously stored in the buffer object is lost.  If data is NULL,
 135  * memory will be allocated, but no copy will occur.
 136  * Called via glBufferDataARB().
 137  */
 138 static void
 139 st_bufferobj_data(GLcontext *ctx,
 140                   GLenum target,
 141                   GLsizeiptrARB size,
 142                   const GLvoid * data,
 143                   GLenum usage,
 144                   struct gl_buffer_object *obj)
 145 {
 146    struct st_context *st = st_context(ctx);
 147    struct pipe_context *pipe = st->pipe;
 148    struct st_buffer_object *st_obj = st_buffer_object(obj);
 149    unsigned buffer_usage;
 150
 151    st_obj->Base.Size = size;
 152    st_obj->Base.Usage = usage;
 153
 154    switch(target) {
 155    case GL_PIXEL_PACK_BUFFER_ARB:
 156    case GL_PIXEL_UNPACK_BUFFER_ARB:
 157       buffer_usage = PIPE_BUFFER_USAGE_PIXEL;
 158       break;
 159    case GL_ARRAY_BUFFER_ARB:
 160       buffer_usage = PIPE_BUFFER_USAGE_VERTEX;
 161       break;
 162    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 163       buffer_usage = PIPE_BUFFER_USAGE_INDEX;
 164       break;
 165    default:
 166       buffer_usage = 0;
 167    }
 168
 169    pipe_buffer_reference( &st_obj->buffer, NULL );
 170
 171    st_obj->buffer = pipe_buffer_create( pipe->screen, 32, buffer_usage, size );
 172
 173    if (!st_obj->buffer) {
 174       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB");
 175       return;
 176    }
 177
 178    st_obj->size = size;
 179
 180    if (data)
 181       st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
 182                                     size, data);
 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    GLuint 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 /**
 223  * Called via glMapBufferRange().
 224  */
 225 static void *
 226 st_bufferobj_map_range(GLcontext *ctx, GLenum target,
 227                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 228                        struct gl_buffer_object *obj)
 229 {
 230    struct pipe_context *pipe = st_context(ctx)->pipe;
 231    struct st_buffer_object *st_obj = st_buffer_object(obj);
 232    GLuint flags = 0;
 233    char *map;
 234
 235    if (access & GL_MAP_WRITE_BIT)
 236       flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 237
 238    if (access & GL_MAP_READ_BIT)
 239       flags |= PIPE_BUFFER_USAGE_CPU_READ;
 240
 241    /* ... other flags ...
 242     */
 243
 244    if (access & MESA_MAP_NOWAIT_BIT)
 245       flags |= PIPE_BUFFER_USAGE_DONTBLOCK;
 246
 247    assert(offset >= 0);
 248    assert(length >= 0);
 249    assert(offset < obj->Size);
 250    assert(offset + length <= obj->Size);
 251
 252    map = obj->Pointer = pipe_buffer_map_range(pipe->screen, st_obj->buffer, offset, length, flags);
 253    if(obj->Pointer) {
 254       obj->Offset = 0;
 255       obj->Length = obj->Size;
 256       map += offset;
 257    }
 258
 259    return map;
 260 }
 261
 262
 263 static void
 264 st_bufferobj_flush_mapped_range(GLcontext *ctx, GLenum target,
 265                                 GLintptr offset, GLsizeiptr length,
 266                                 struct gl_buffer_object *obj)
 267 {
 268    struct pipe_context *pipe = st_context(ctx)->pipe;
 269    struct st_buffer_object *st_obj = st_buffer_object(obj);
 270
 271    /* Subrange is relative to mapped range */
 272    assert(offset >= 0);
 273    assert(length >= 0);
 274    assert(offset < obj->Length);
 275    assert(offset + length <= obj->Length);
 276
 277    pipe_buffer_flush_mapped_range(pipe->screen, st_obj->buffer,
 278                                   obj->Offset + offset, length);
 279 }
 280
 281
 282 /**
 283  * Called via glUnmapBufferARB().
 284  */
 285 static GLboolean
 286 st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
 287 {
 288    struct pipe_context *pipe = st_context(ctx)->pipe;
 289    struct st_buffer_object *st_obj = st_buffer_object(obj);
 290
 291    pipe_buffer_unmap(pipe->screen, st_obj->buffer);
 292    obj->Pointer = NULL;
 293    obj->Offset = 0;
 294    obj->Length = 0;
 295    return GL_TRUE;
 296 }
 297
 298
 299 void
 300 st_init_bufferobject_functions(struct dd_function_table *functions)
 301 {
 302    functions->NewBufferObject = st_bufferobj_alloc;
 303    functions->DeleteBuffer = st_bufferobj_free;
 304    functions->BufferData = st_bufferobj_data;
 305    functions->BufferSubData = st_bufferobj_subdata;
 306    functions->GetBufferSubData = st_bufferobj_get_subdata;
 307    functions->MapBuffer = st_bufferobj_map;
 308    functions->MapBufferRange = st_bufferobj_map_range;
 309    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 310    functions->UnmapBuffer = st_bufferobj_unmap;
 311
 312    /* For GL_APPLE_vertex_array_object */
 313    functions->NewArrayObject = _mesa_new_array_object;
 314    functions->DeleteArrayObject = _mesa_delete_array_object;
 315 }