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    /**
  49     * \name Packed depth/stencil unwrappers
  50     *
  51     * If the intel_context is using separate stencil and this renderbuffer has
  52     * a a packed depth/stencil format, then wrapped_depth and wrapped_stencil
  53     * are the real renderbuffers.
  54     */
  55    struct gl_renderbuffer *wrapped_depth;
  56    struct gl_renderbuffer *wrapped_stencil;
  57
  58    /** \} */
  59
  60    GLuint draw_offset; /**< Offset of drawing address within the region */
  61    GLuint draw_x, draw_y; /**< Offset of drawing within the region */
  62 };
  63
  64
  65 /**
  66  * gl_renderbuffer is a base class which we subclass.  The Class field
  67  * is used for simple run-time type checking.
  68  */
  69 #define INTEL_RB_CLASS 0x12345678
  70
  71
  72 /**
  73  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  74  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  75  * This is determined by checking the ClassID.
  76  */
  77 static INLINE struct intel_renderbuffer *
  78 intel_renderbuffer(struct gl_renderbuffer *rb)
  79 {
  80    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  81    if (irb && irb->Base.ClassID == INTEL_RB_CLASS) {
  82       /*_mesa_warning(NULL, "Returning non-intel Rb\n");*/
  83       return irb;
  84    }
  85    else
  86       return NULL;
  87 }
  88
  89
  90 /**
  91  * \brief Return the framebuffer attachment specified by attIndex.
  92  *
  93  * If the framebuffer lacks the specified attachment, then return null.
  94  *
  95  * If the attached renderbuffer is a wrapper, then return wrapped
  96  * renderbuffer.
  97  */
  98 static INLINE struct intel_renderbuffer *
  99 intel_get_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index attIndex)
 100 {
 101    struct gl_renderbuffer *rb;
 102    struct intel_renderbuffer *irb;
 103
 104    /* XXX: Who passes -1 to intel_get_renderbuffer? */
 105    if (attIndex < 0)
 106       return NULL;
 107
 108    rb = fb->Attachment[attIndex].Renderbuffer;
 109    if (!rb)
 110       return NULL;
 111
 112    irb = intel_renderbuffer(rb);
 113    if (!irb)
 114       return NULL;
 115
 116    switch (attIndex) {
 117    case BUFFER_DEPTH:
 118       if (irb->wrapped_depth) {
 119          irb = intel_renderbuffer(irb->wrapped_depth);
 120       }
 121       break;
 122    case BUFFER_STENCIL:
 123       if (irb->wrapped_stencil) {
 124          irb = intel_renderbuffer(irb->wrapped_stencil);
 125       }
 126       break;
 127    default:
 128       break;
 129    }
 130
 131    return irb;
 132 }
 133
 134 /**
 135  * If the framebuffer has a depth buffer attached, then return its HiZ region.
 136  * The HiZ region may be null.
 137  */
 138 static INLINE struct intel_region*
 139 intel_framebuffer_get_hiz_region(struct gl_framebuffer *fb)
 140 {
 141    struct intel_renderbuffer *rb = NULL;
 142    if (fb)
 143       rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 144
 145    if (rb)
 146       return rb->hiz_region;
 147    else
 148       return NULL;
 149 }
 150
 151 static INLINE bool
 152 intel_framebuffer_has_hiz(struct gl_framebuffer *fb)
 153 {
 154    return intel_framebuffer_get_hiz_region(fb) != NULL;
 155 }
 156
 157
 158 extern void
 159 intel_renderbuffer_set_region(struct intel_context *intel,
 160                               struct intel_renderbuffer *irb,
 161                               struct intel_region *region);
 162
 163 extern void
 164 intel_renderbuffer_set_hiz_region(struct intel_context *intel,
 165                                   struct intel_renderbuffer *rb,
 166                                   struct intel_region *region);
 167
 168
 169 extern struct intel_renderbuffer *
 170 intel_create_renderbuffer(gl_format format);
 171
 172
 173 extern void
 174 intel_fbo_init(struct intel_context *intel);
 175
 176
 177 extern void
 178 intel_flip_renderbuffers(struct gl_framebuffer *fb);
 179
 180 uint32_t
 181 intel_renderbuffer_tile_offsets(struct intel_renderbuffer *irb,
 182                                 uint32_t *tile_x,
 183                                 uint32_t *tile_y);
 184
 185 static INLINE struct intel_region *
 186 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
 187 {
 188    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
 189    if (irb)
 190       return irb->region;
 191    else
 192       return NULL;
 193 }
 194
 195 #endif /* INTEL_FBO_H */