src/mesa/drivers/dri/intel/intel_fbo.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.
  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 #ifndef INTEL_FBO_H
  29 #define INTEL_FBO_H
  30
  31 #include <stdbool.h>
  32 #include "main/formats.h"
  33 #include "intel_screen.h"
  34
  35 struct intel_context;
  36
  37 /**
  38  * Intel renderbuffer, derived from gl_renderbuffer.
  39  */
  40 struct intel_renderbuffer
  41 {
  42    struct gl_renderbuffer Base;
  43    struct intel_region *region;
  44
  45    /** Only used by depth renderbuffers for which HiZ is enabled. */
  46    struct intel_region *hiz_region;
  47
  48    GLuint draw_offset; /**< Offset of drawing address within the region */
  49    GLuint draw_x, draw_y; /**< Offset of drawing within the region */
  50 };
  51
  52
  53 /**
  54  * gl_renderbuffer is a base class which we subclass.  The Class field
  55  * is used for simple run-time type checking.
  56  */
  57 #define INTEL_RB_CLASS 0x12345678
  58
  59
  60 /**
  61  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  62  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  63  * This is determined by checking the ClassID.
  64  */
  65 static INLINE struct intel_renderbuffer *
  66 intel_renderbuffer(struct gl_renderbuffer *rb)
  67 {
  68    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  69    if (irb && irb->Base.ClassID == INTEL_RB_CLASS) {
  70       /*_mesa_warning(NULL, "Returning non-intel Rb\n");*/
  71       return irb;
  72    }
  73    else
  74       return NULL;
  75 }
  76
  77
  78 /**
  79  * Return a framebuffer's renderbuffer, named by a BUFFER_x index.
  80  */
  81 static INLINE struct intel_renderbuffer *
  82 intel_get_renderbuffer(struct gl_framebuffer *fb, int attIndex)
  83 {
  84    if (attIndex >= 0)
  85       return intel_renderbuffer(fb->Attachment[attIndex].Renderbuffer);
  86    else
  87       return NULL;
  88 }
  89
  90 /**
  91  * If the framebuffer has a depth buffer attached, then return its HiZ region.
  92  * The HiZ region may be null.
  93  */
  94 static INLINE struct intel_region*
  95 intel_framebuffer_get_hiz_region(struct gl_framebuffer *fb)
  96 {
  97    struct intel_renderbuffer *rb = NULL;
  98    if (fb)
  99       rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 100
 101    if (rb)
 102       return rb->hiz_region;
 103    else
 104       return NULL;
 105 }
 106
 107 static INLINE bool
 108 intel_framebuffer_has_hiz(struct gl_framebuffer *fb)
 109 {
 110    return intel_framebuffer_get_hiz_region(fb) != NULL;
 111 }
 112
 113
 114 extern void
 115 intel_renderbuffer_set_region(struct intel_context *intel,
 116                               struct intel_renderbuffer *irb,
 117                               struct intel_region *region);
 118
 119 extern void
 120 intel_renderbuffer_set_hiz_region(struct intel_context *intel,
 121                                   struct intel_renderbuffer *rb,
 122                                   struct intel_region *region);
 123
 124
 125 extern struct intel_renderbuffer *
 126 intel_create_renderbuffer(gl_format format);
 127
 128
 129 extern void
 130 intel_fbo_init(struct intel_context *intel);
 131
 132
 133 extern void
 134 intel_flip_renderbuffers(struct gl_framebuffer *fb);
 135
 136 uint32_t
 137 intel_renderbuffer_tile_offsets(struct intel_renderbuffer *irb,
 138                                 uint32_t *tile_x,
 139                                 uint32_t *tile_y);
 140
 141 static INLINE struct intel_region *
 142 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
 143 {
 144    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
 145    if (irb)
 146       return irb->region;
 147    else
 148       return NULL;
 149 }
 150
 151 #endif /* INTEL_FBO_H */