src/mesa/drivers/dri/i965/intel_buffer_objects.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 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 "imports.h"
  30 #include "mtypes.h"
  31 #include "bufferobj.h"
  32
  33 #include "intel_context.h"
  34 #include "intel_buffer_objects.h"
  35 #include "bufmgr.h"
  36
  37
  38 /**
  39  * There is some duplication between mesa's bufferobjects and our
  40  * bufmgr buffers.  Both have an integer handle and a hashtable to
  41  * lookup an opaque structure.  It would be nice if the handles and
  42  * internal structure where somehow shared.
  43  */
  44 static struct gl_buffer_object *intel_bufferobj_alloc( GLcontext *ctx,
  45                                                        GLuint name,
  46                                                        GLenum target )
  47 {
  48    struct intel_context *intel = intel_context(ctx);
  49    struct intel_buffer_object *obj = MALLOC_STRUCT(intel_buffer_object);
  50
  51    _mesa_initialize_buffer_object(&obj->Base, name, target);
  52
  53    /* XXX:  We generate our own handle, which is different to 'name' above.
  54     */
  55    bmGenBuffers(intel, "bufferobj", 1, &obj->buffer, 6);
  56    assert(obj->buffer);
  57
  58    return &obj->Base;
  59 }
  60
  61
  62 /**
  63  * Deallocate/free a vertex/pixel buffer object.
  64  * Called via glDeleteBuffersARB().
  65  */
  66 static void intel_bufferobj_free( GLcontext *ctx,
  67                                   struct gl_buffer_object *obj )
  68 {
  69    struct intel_context *intel = intel_context(ctx);
  70    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
  71
  72    assert(intel_obj);
  73
  74    if (intel_obj->buffer)
  75       bmDeleteBuffers( intel, 1, &intel_obj->buffer );
  76
  77    _mesa_free(intel_obj);
  78 }
  79
  80
  81
  82 /**
  83  * Allocate space for and store data in a buffer object.  Any data that was
  84  * previously stored in the buffer object is lost.  If data is NULL,
  85  * memory will be allocated, but no copy will occur.
  86  * Called via glBufferDataARB().
  87  */
  88 static void intel_bufferobj_data( GLcontext *ctx,
  89                                   GLenum target,
  90                                   GLsizeiptrARB size,
  91                                   const GLvoid *data,
  92                                   GLenum usage,
  93                                   struct gl_buffer_object *obj )
  94 {
  95    struct intel_context *intel = intel_context(ctx);
  96    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
  97
  98    /* XXX: do something useful with 'usage' (eg. populate flags
  99     * argument below)
 100     */
 101    assert(intel_obj);
 102
 103    obj->Size = size;
 104    obj->Usage = usage;
 105
 106    bmBufferDataAUB(intel, intel_obj->buffer, size, data, 0,
 107                    0, 0);
 108 }
 109
 110
 111 /**
 112  * Replace data in a subrange of buffer object.  If the data range
 113  * specified by size + offset extends beyond the end of the buffer or
 114  * if data is NULL, no copy is performed.
 115  * Called via glBufferSubDataARB().
 116  */
 117 static void intel_bufferobj_subdata( GLcontext *ctx,
 118                                      GLenum target,
 119                                      GLintptrARB offset,
 120                                      GLsizeiptrARB size,
 121                                      const GLvoid * data,
 122                                      struct gl_buffer_object * obj )
 123 {
 124    struct intel_context *intel = intel_context(ctx);
 125    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 126
 127    assert(intel_obj);
 128    bmBufferSubDataAUB(intel, intel_obj->buffer, offset, size, data, 0, 0);
 129 }
 130
 131
 132 /**
 133  * Called via glGetBufferSubDataARB().
 134  */
 135 static void intel_bufferobj_get_subdata( GLcontext *ctx,
 136                                          GLenum target,
 137                                          GLintptrARB offset,
 138                                          GLsizeiptrARB size,
 139                                          GLvoid * data,
 140                                          struct gl_buffer_object * obj )
 141 {
 142    struct intel_context *intel = intel_context(ctx);
 143    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 144
 145    assert(intel_obj);
 146    bmBufferGetSubData(intel, intel_obj->buffer, offset, size, data);
 147 }
 148
 149
 150
 151 /**
 152  * Called via glMapBufferARB().
 153  */
 154 static void *intel_bufferobj_map( GLcontext *ctx,
 155                                   GLenum target,
 156                                   GLenum access,
 157                                   struct gl_buffer_object *obj )
 158 {
 159    struct intel_context *intel = intel_context(ctx);
 160    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 161
 162    /* XXX: Translate access to flags arg below:
 163     */
 164    assert(intel_obj);
 165    assert(intel_obj->buffer);
 166    obj->Pointer = bmMapBuffer(intel, intel_obj->buffer, 0);
 167    return obj->Pointer;
 168 }
 169
 170
 171 /**
 172  * Called via glMapBufferARB().
 173  */
 174 static GLboolean intel_bufferobj_unmap( GLcontext *ctx,
 175                                         GLenum target,
 176                                         struct gl_buffer_object *obj )
 177 {
 178    struct intel_context *intel = intel_context(ctx);
 179    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 180
 181    assert(intel_obj);
 182    assert(intel_obj->buffer);
 183    assert(obj->Pointer);
 184    bmUnmapBufferAUB(intel, intel_obj->buffer, 0, 0);
 185    obj->Pointer = NULL;
 186    return GL_TRUE;
 187 }
 188
 189 struct buffer *intel_bufferobj_buffer( const struct intel_buffer_object *intel_obj )
 190 {
 191    assert(intel_obj->Base.Name);
 192    assert(intel_obj->buffer);
 193    return intel_obj->buffer;
 194 }
 195
 196 void intel_bufferobj_init( struct intel_context *intel )
 197 {
 198    GLcontext *ctx = &intel->ctx;
 199
 200    ctx->Driver.NewBufferObject = intel_bufferobj_alloc;
 201    ctx->Driver.DeleteBuffer = intel_bufferobj_free;
 202    ctx->Driver.BufferData = intel_bufferobj_data;
 203    ctx->Driver.BufferSubData = intel_bufferobj_subdata;
 204    ctx->Driver.GetBufferSubData = intel_bufferobj_get_subdata;
 205    ctx->Driver.MapBuffer = intel_bufferobj_map;
 206    ctx->Driver.UnmapBuffer = intel_bufferobj_unmap;
 207 }