src/mesa/pipe/i915simple/i915_winsys.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  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.
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  27
  28 #ifndef I915_WINSYS_H
  29 #define I915_WINSYS_H
  30
  31
  32 /* This is the interface that softpipe requires any window system
  33  * hosting it to implement.  This is the only include file in softpipe
  34  * which is public.
  35  */
  36
  37
  38 /* Pipe drivers are (meant to be!) independent of both GL and the
  39  * window system.  The window system provides a buffer manager and a
  40  * set of additional hooks for things like command buffer submission,
  41  * etc.
  42  *
  43  * There clearly has to be some agreement between the window system
  44  * driver and the hardware driver about the format of command buffers,
  45  * etc.
  46  */
  47
  48 struct pipe_buffer_handle;
  49 struct pipe_winsys;
  50
  51 struct i915_winsys {
  52
  53    /* An over-simple batchbuffer mechanism.  Will want to improve the
  54     * performance of this, perhaps based on the cmdstream stuff.  It
  55     * would be pretty impossible to implement swz on top of this
  56     * interface.
  57     *
  58     * Will also need additions/changes to implement static/dynamic
  59     * indirect state.
  60     */
  61    unsigned *(*batch_start)( struct i915_winsys *sws,
  62                              unsigned dwords,
  63                              unsigned relocs );
  64    void (*batch_dword)( struct i915_winsys *sws,
  65                         unsigned dword );
  66    void (*batch_reloc)( struct i915_winsys *sws,
  67                         struct pipe_buffer_handle *buf,
  68                         unsigned access_flags,
  69                         unsigned delta );
  70    void (*batch_flush)( struct i915_winsys *sws );
  71
  72 };
  73
  74 #define I915_BUFFER_ACCESS_WRITE   0x1
  75 #define I915_BUFFER_ACCESS_READ    0x2
  76
  77
  78 struct pipe_context *i915_create( struct pipe_winsys *,
  79                                   struct i915_winsys *,
  80                                   unsigned pci_id );
  81
  82
  83 #endif