src/mesa/drivers/dri/i965/intel_batchbuffer.h

   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.
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  26  **************************************************************************/
  27
  28 #ifndef INTEL_BATCHBUFFER_H
  29 #define INTEL_BATCHBUFFER_H
  30
  31 #include "mtypes.h"
  32 #include "bufmgr.h"
  33
  34 struct intel_context;
  35
  36 #define BATCH_SZ (16 * 1024)
  37 #define BATCH_REFILL 4096
  38 #define BATCH_RESERVED 16
  39
  40 #define INTEL_BATCH_NO_CLIPRECTS 0x1
  41 #define INTEL_BATCH_CLIPRECTS    0x2
  42
  43 struct intel_batchbuffer {
  44    struct intel_context *intel;
  45
  46    struct buffer *buffer;
  47
  48    GLuint flags;
  49    GLuint offset;
  50
  51    GLubyte *map;
  52    GLubyte *ptr;
  53 };
  54
  55 struct intel_batchbuffer *intel_batchbuffer_alloc( struct intel_context *intel );
  56
  57 void intel_batchbuffer_free( struct intel_batchbuffer *batch );
  58
  59
  60 void intel_batchbuffer_flush( struct intel_batchbuffer *batch );
  61
  62 void intel_batchbuffer_unmap( struct intel_batchbuffer *batch );
  63 void intel_batchbuffer_map( struct intel_batchbuffer *batch );
  64
  65
  66 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  67  * Consider it a convenience function wrapping multple
  68  * intel_buffer_dword() calls.
  69  */
  70 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
  71                             const void *data,
  72                             GLuint bytes,
  73                             GLuint flags);
  74
  75 void intel_batchbuffer_release_space(struct intel_batchbuffer *batch,
  76                                    GLuint bytes);
  77
  78
  79 /* Inline functions - might actually be better off with these
  80  * non-inlined.  Certainly better off switching all command packets to
  81  * be passed as structs rather than dwords, but that's a little bit of
  82  * work...
  83  */
  84 static inline GLuint
  85 intel_batchbuffer_space( struct intel_batchbuffer *batch )
  86 {
  87    return (BATCH_SZ - BATCH_RESERVED) - (batch->ptr - (batch->map + batch->offset));
  88 }
  89
  90
  91 static inline void
  92 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch,
  93                              GLuint dword)
  94 {
  95    assert(batch->map);
  96    assert(intel_batchbuffer_space(batch) >= 4);
  97    *(GLuint *)(batch->ptr) = dword;
  98    batch->ptr += 4;
  99 }
 100
 101 static inline void
 102 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
 103                                 GLuint sz,
 104                                 GLuint flags)
 105 {
 106    assert(sz < BATCH_SZ - 8);
 107    if (intel_batchbuffer_space(batch) < sz ||
 108        (batch->flags != 0 && flags != 0 && batch->flags != flags))
 109       intel_batchbuffer_flush(batch);
 110
 111    batch->flags |= flags;
 112 }
 113
 114 void intel_batchbuffer_align( struct intel_batchbuffer *batch,
 115                               GLuint align,
 116                               GLuint sz );
 117
 118
 119 /* Here are the crusty old macros, to be removed:
 120  */
 121 #define BATCH_LOCALS
 122 #define BEGIN_BATCH(n, flags) intel_batchbuffer_require_space(intel->batch, n*4, flags)
 123 #define OUT_BATCH(d)  intel_batchbuffer_emit_dword(intel->batch, d)
 124 #define ADVANCE_BATCH() do { } while(0)
 125
 126
 127 #endif