src/gallium/drivers/i915simple/i915_winsys.h

   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  * \file
  30  * This is the interface that i915simple requires any window system
  31  * hosting it to implement.  This is the only include file in i915simple
  32  * which is public.
  33  *
  34  * This isn't currently true as the winsys needs i915_batchbuffer.h
  35  */
  36
  37 #ifndef I915_WINSYS_H
  38 #define I915_WINSYS_H
  39
  40
  41 #include "pipe/p_defines.h"
  42
  43
  44 #ifdef __cplusplus
  45 extern "C" {
  46 #endif
  47
  48
  49 /* Pipe drivers are independent of both GL and the window system.
  50  * The window system provides a buffer manager and a set of additional
  51  * hooks for things like command buffer submission, etc.
  52  *
  53  * There clearly has to be some agreement between the window system
  54  * driver and the hardware driver about the format of command buffers,
  55  * etc.
  56  */
  57
  58 struct i915_batchbuffer;
  59 struct pipe_texture;
  60 struct pipe_buffer;
  61 struct pipe_fence_handle;
  62 struct pipe_winsys;
  63 struct pipe_screen;
  64
  65
  66 /**
  67  * Additional winsys interface for i915simple.
  68  *
  69  * It is an over-simple batchbuffer mechanism.  Will want to improve the
  70  * performance of this, perhaps based on the cmdstream stuff.  It
  71  * would be pretty impossible to implement swz on top of this
  72  * interface.
  73  *
  74  * Will also need additions/changes to implement static/dynamic
  75  * indirect state.
  76  */
  77 struct i915_winsys {
  78
  79    void (*destroy)( struct i915_winsys *sws );
  80
  81    /**
  82     * Get the current batch buffer from the winsys.
  83     */
  84    struct i915_batchbuffer *(*batch_get)( struct i915_winsys *sws );
  85
  86    /**
  87     * Emit a relocation to a buffer.
  88     *
  89     * Used not only when the buffer addresses are not pinned, but also to
  90     * ensure refered buffers will not be destroyed until the current batch
  91     * buffer execution is finished.
  92     *
  93     * The access flags is a combination of I915_BUFFER_ACCESS_WRITE and
  94     * I915_BUFFER_ACCESS_READ macros.
  95     */
  96    void (*batch_reloc)( struct i915_winsys *sws,
  97                         struct pipe_buffer *buf,
  98                         unsigned access_flags,
  99                         unsigned delta );
 100
 101    /**
 102     * Flush the batch.
 103     */
 104    void (*batch_flush)( struct i915_winsys *sws,
 105                         struct pipe_fence_handle **fence );
 106 };
 107
 108 #define I915_BUFFER_ACCESS_WRITE   0x1
 109 #define I915_BUFFER_ACCESS_READ    0x2
 110
 111 #define I915_BUFFER_USAGE_LIT_VERTEX  (PIPE_BUFFER_USAGE_CUSTOM << 0)
 112 #define I915_BUFFER_USAGE_SCANOUT     (PIPE_BUFFER_USAGE_CUSTOM << 1)
 113
 114
 115 /**
 116  * Create i915 pipe_screen.
 117  */
 118 struct pipe_screen *i915_create_screen( struct pipe_winsys *winsys,
 119                                         uint pci_id );
 120
 121 /**
 122  * Create a i915 pipe_context.
 123  */
 124 struct pipe_context *i915_create_context( struct pipe_screen *screen,
 125                                           struct pipe_winsys *winsys,
 126                                           struct i915_winsys *i915 );
 127
 128 /**
 129  * Used for the winsys to get the buffer used for a texture
 130  * and also the stride used for the texture.
 131  *
 132  * Buffer is referenced for you so you need to unref after use.
 133  *
 134  * This is needed for example kms.
 135  */
 136 boolean i915_get_texture_buffer( struct pipe_texture *texture,
 137                                  struct pipe_buffer **buf,
 138                                  unsigned *stride );
 139
 140 #ifdef __cplusplus
 141 }
 142 #endif
 143
 144 #endif