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 <assert.h>
  33 #include "main/formats.h"
  34 #include "intel_context.h"
  35 #include "intel_screen.h"
  36
  37 struct intel_context;
  38 struct intel_texture_image;
  39
  40 /**
  41  * Intel renderbuffer, derived from gl_renderbuffer.
  42  */
  43 struct intel_renderbuffer
  44 {
  45    struct gl_renderbuffer Base;
  46    struct intel_region *region;
  47
  48    /** Only used by depth renderbuffers for which HiZ is enabled. */
  49    struct intel_region *hiz_region;
  50
  51    /**
  52     * \name Packed depth/stencil unwrappers
  53     *
  54     * If the intel_context is using separate stencil and this renderbuffer has
  55     * a a packed depth/stencil format, then wrapped_depth and wrapped_stencil
  56     * are the real renderbuffers.
  57     */
  58    struct gl_renderbuffer *wrapped_depth;
  59    struct gl_renderbuffer *wrapped_stencil;
  60
  61    /** \} */
  62
  63    GLuint draw_x, draw_y; /**< Offset of drawing within the region */
  64 };
  65
  66
  67 /**
  68  * gl_renderbuffer is a base class which we subclass.  The Class field
  69  * is used for simple run-time type checking.
  70  */
  71 #define INTEL_RB_CLASS 0x12345678
  72
  73
  74 /**
  75  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  76  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  77  * This is determined by checking the ClassID.
  78  */
  79 static INLINE struct intel_renderbuffer *
  80 intel_renderbuffer(struct gl_renderbuffer *rb)
  81 {
  82    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  83    if (irb && irb->Base.ClassID == INTEL_RB_CLASS) {
  84       /*_mesa_warning(NULL, "Returning non-intel Rb\n");*/
  85       return irb;
  86    }
  87    else
  88       return NULL;
  89 }
  90
  91
  92 /**
  93  * \brief Return the framebuffer attachment specified by attIndex.
  94  *
  95  * If the framebuffer lacks the specified attachment, then return null.
  96  *
  97  * If the attached renderbuffer is a wrapper, then return wrapped
  98  * renderbuffer.
  99  */
 100 static INLINE struct intel_renderbuffer *
 101 intel_get_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index attIndex)
 102 {
 103    struct gl_renderbuffer *rb;
 104    struct intel_renderbuffer *irb;
 105
 106    assert((unsigned)attIndex < ARRAY_SIZE(fb->Attachment));
 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 extern struct intel_renderbuffer *
 158 intel_create_renderbuffer(gl_format format);
 159
 160 struct gl_renderbuffer*
 161 intel_create_wrapped_renderbuffer(struct gl_context * ctx,
 162                                   int width, int height,
 163                                   gl_format format);
 164
 165 GLboolean
 166 intel_alloc_renderbuffer_storage(struct gl_context * ctx,
 167                                  struct gl_renderbuffer *rb,
 168                                  GLenum internalFormat,
 169                                  GLuint width, GLuint height);
 170
 171 extern void
 172 intel_fbo_init(struct intel_context *intel);
 173
 174
 175 extern void
 176 intel_flip_renderbuffers(struct gl_framebuffer *fb);
 177
 178 void
 179 intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb,
 180                                    struct intel_texture_image *intel_image,
 181                                    int zoffset);
 182
 183 uint32_t
 184 intel_renderbuffer_tile_offsets(struct intel_renderbuffer *irb,
 185                                 uint32_t *tile_x,
 186                                 uint32_t *tile_y);
 187
 188 static INLINE struct intel_region *
 189 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
 190 {
 191    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
 192    if (irb)
 193       return irb->region;
 194    else
 195       return NULL;
 196 }
 197
 198 #endif /* INTEL_FBO_H */