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 struct intel_texture_image;
  37
  38 /**
  39  * Intel renderbuffer, derived from gl_renderbuffer.
  40  */
  41 struct intel_renderbuffer
  42 {
  43    struct gl_renderbuffer Base;
  44    struct intel_region *region;
  45
  46    /** Only used by depth renderbuffers for which HiZ is enabled. */
  47    struct intel_region *hiz_region;
  48
  49    /**
  50     * \name Packed depth/stencil unwrappers
  51     *
  52     * If the intel_context is using separate stencil and this renderbuffer has
  53     * a a packed depth/stencil format, then wrapped_depth and wrapped_stencil
  54     * are the real renderbuffers.
  55     */
  56    struct gl_renderbuffer *wrapped_depth;
  57    struct gl_renderbuffer *wrapped_stencil;
  58
  59    /** \} */
  60
  61    GLuint draw_offset; /**< Offset of drawing address within the region */
  62    GLuint draw_x, draw_y; /**< Offset of drawing within the region */
  63 };
  64
  65
  66 /**
  67  * gl_renderbuffer is a base class which we subclass.  The Class field
  68  * is used for simple run-time type checking.
  69  */
  70 #define INTEL_RB_CLASS 0x12345678
  71
  72
  73 /**
  74  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  75  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  76  * This is determined by checking the ClassID.
  77  */
  78 static INLINE struct intel_renderbuffer *
  79 intel_renderbuffer(struct gl_renderbuffer *rb)
  80 {
  81    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  82    if (irb && irb->Base.ClassID == INTEL_RB_CLASS) {
  83       /*_mesa_warning(NULL, "Returning non-intel Rb\n");*/
  84       return irb;
  85    }
  86    else
  87       return NULL;
  88 }
  89
  90
  91 /**
  92  * \brief Return the framebuffer attachment specified by attIndex.
  93  *
  94  * If the framebuffer lacks the specified attachment, then return null.
  95  *
  96  * If the attached renderbuffer is a wrapper, then return wrapped
  97  * renderbuffer.
  98  */
  99 static INLINE struct intel_renderbuffer *
 100 intel_get_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index attIndex)
 101 {
 102    struct gl_renderbuffer *rb;
 103    struct intel_renderbuffer *irb;
 104
 105    /* XXX: Who passes -1 to intel_get_renderbuffer? */
 106    if (attIndex < 0)
 107       return NULL;
 108
 109    rb = fb->Attachment[attIndex].Renderbuffer;
 110    if (!rb)
 111       return NULL;
 112
 113    irb = intel_renderbuffer(rb);
 114    if (!irb)
 115       return NULL;
 116
 117    switch (attIndex) {
 118    case BUFFER_DEPTH:
 119       if (irb->wrapped_depth) {
 120          irb = intel_renderbuffer(irb->wrapped_depth);
 121       }
 122       break;
 123    case BUFFER_STENCIL:
 124       if (irb->wrapped_stencil) {
 125          irb = intel_renderbuffer(irb->wrapped_stencil);
 126       }
 127       break;
 128    default:
 129       break;
 130    }
 131
 132    return irb;
 133 }
 134
 135 /**
 136  * If the framebuffer has a depth buffer attached, then return its HiZ region.
 137  * The HiZ region may be null.
 138  */
 139 static INLINE struct intel_region*
 140 intel_framebuffer_get_hiz_region(struct gl_framebuffer *fb)
 141 {
 142    struct intel_renderbuffer *rb = NULL;
 143    if (fb)
 144       rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 145
 146    if (rb)
 147       return rb->hiz_region;
 148    else
 149       return NULL;
 150 }
 151
 152 static INLINE bool
 153 intel_framebuffer_has_hiz(struct gl_framebuffer *fb)
 154 {
 155    return intel_framebuffer_get_hiz_region(fb) != NULL;
 156 }
 157
 158
 159 extern void
 160 intel_renderbuffer_set_region(struct intel_context *intel,
 161                               struct intel_renderbuffer *irb,
 162                               struct intel_region *region);
 163
 164 extern void
 165 intel_renderbuffer_set_hiz_region(struct intel_context *intel,
 166                                   struct intel_renderbuffer *rb,
 167                                   struct intel_region *region);
 168
 169
 170 extern struct intel_renderbuffer *
 171 intel_create_renderbuffer(gl_format format);
 172
 173 struct gl_renderbuffer*
 174 intel_create_wrapped_renderbuffer(struct gl_context * ctx,
 175                                   int width, int height,
 176                                   gl_format format);
 177
 178 GLboolean
 179 intel_alloc_renderbuffer_storage(struct gl_context * ctx,
 180                                  struct gl_renderbuffer *rb,
 181                                  GLenum internalFormat,
 182                                  GLuint width, GLuint height);
 183
 184 extern void
 185 intel_fbo_init(struct intel_context *intel);
 186
 187
 188 extern void
 189 intel_flip_renderbuffers(struct gl_framebuffer *fb);
 190
 191 void
 192 intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb,
 193                                    struct intel_texture_image *intel_image,
 194                                    int zoffset);
 195
 196 uint32_t
 197 intel_renderbuffer_tile_offsets(struct intel_renderbuffer *irb,
 198                                 uint32_t *tile_x,
 199                                 uint32_t *tile_y);
 200
 201 static INLINE struct intel_region *
 202 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
 203 {
 204    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
 205    if (irb)
 206       return irb->region;
 207    else
 208       return NULL;
 209 }
 210
 211 #endif /* INTEL_FBO_H */