src/mesa/drivers/dri/i965/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 "main/macros.h"
  35 #include "brw_context.h"
  36 #include "intel_mipmap_tree.h"
  37 #include "intel_screen.h"
  38
  39 #ifdef __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 struct intel_mipmap_tree;
  44 struct intel_texture_image;
  45
  46 /**
  47  * Intel renderbuffer, derived from gl_renderbuffer.
  48  */
  49 struct intel_renderbuffer
  50 {
  51    struct swrast_renderbuffer Base;
  52    struct intel_mipmap_tree *mt; /**< The renderbuffer storage. */
  53
  54    /**
  55     * \name Miptree view
  56     * \{
  57     *
  58     * Multiple renderbuffers may simultaneously wrap a single texture and each
  59     * provide a different view into that texture. The fields below indicate
  60     * which miptree slice is wrapped by this renderbuffer.  The fields' values
  61     * are consistent with the 'level' and 'layer' parameters of
  62     * glFramebufferTextureLayer().
  63     *
  64     * For renderbuffers not created with glFramebufferTexture*(), mt_level and
  65     * mt_layer are 0.
  66     */
  67    unsigned int mt_level;
  68    unsigned int mt_layer;
  69    /** \} */
  70
  71    GLuint draw_x, draw_y; /**< Offset of drawing within the region */
  72 };
  73
  74
  75 /**
  76  * gl_renderbuffer is a base class which we subclass.  The Class field
  77  * is used for simple run-time type checking.
  78  */
  79 #define INTEL_RB_CLASS 0x12345678
  80
  81
  82 /**
  83  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  84  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  85  * This is determined by checking the ClassID.
  86  */
  87 static INLINE struct intel_renderbuffer *
  88 intel_renderbuffer(struct gl_renderbuffer *rb)
  89 {
  90    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  91    if (irb && irb->Base.Base.ClassID == INTEL_RB_CLASS) {
  92       /*_mesa_warning(NULL, "Returning non-intel Rb\n");*/
  93       return irb;
  94    }
  95    else
  96       return NULL;
  97 }
  98
  99
 100 /**
 101  * \brief Return the framebuffer attachment specified by attIndex.
 102  *
 103  * If the framebuffer lacks the specified attachment, then return null.
 104  *
 105  * If the attached renderbuffer is a wrapper, then return wrapped
 106  * renderbuffer.
 107  */
 108 static INLINE struct intel_renderbuffer *
 109 intel_get_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index attIndex)
 110 {
 111    struct gl_renderbuffer *rb;
 112
 113    assert((unsigned)attIndex < ARRAY_SIZE(fb->Attachment));
 114
 115    rb = fb->Attachment[attIndex].Renderbuffer;
 116    if (!rb)
 117       return NULL;
 118
 119    return intel_renderbuffer(rb);
 120 }
 121
 122
 123 static INLINE gl_format
 124 intel_rb_format(const struct intel_renderbuffer *rb)
 125 {
 126    return rb->Base.Base.Format;
 127 }
 128
 129 extern struct intel_renderbuffer *
 130 intel_create_renderbuffer(gl_format format, unsigned num_samples);
 131
 132 struct intel_renderbuffer *
 133 intel_create_private_renderbuffer(gl_format format, unsigned num_samples);
 134
 135 struct gl_renderbuffer*
 136 intel_create_wrapped_renderbuffer(struct gl_context * ctx,
 137                                   int width, int height,
 138                                   gl_format format);
 139
 140 extern void
 141 intel_fbo_init(struct brw_context *brw);
 142
 143 void
 144 intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb);
 145
 146 static inline uint32_t
 147 intel_renderbuffer_get_tile_offsets(struct intel_renderbuffer *irb,
 148                                     uint32_t *tile_x,
 149                                     uint32_t *tile_y)
 150 {
 151    return intel_miptree_get_tile_offsets(irb->mt, irb->mt_level, irb->mt_layer,
 152                                          tile_x, tile_y);
 153 }
 154
 155 void
 156 intel_renderbuffer_set_needs_downsample(struct intel_renderbuffer *irb);
 157
 158 bool
 159 intel_renderbuffer_has_hiz(struct intel_renderbuffer *irb);
 160
 161 void
 162 intel_renderbuffer_set_needs_hiz_resolve(struct intel_renderbuffer *irb);
 163
 164 void
 165 intel_renderbuffer_set_needs_depth_resolve(struct intel_renderbuffer *irb);
 166
 167
 168 /**
 169  * \brief Perform a HiZ resolve on the renderbuffer.
 170  *
 171  * It is safe to call this function on a renderbuffer without HiZ. In that
 172  * case, the function is a no-op.
 173  *
 174  * \return false if no resolve was needed
 175  */
 176 bool
 177 intel_renderbuffer_resolve_hiz(struct brw_context *brw,
 178                                struct intel_renderbuffer *irb);
 179
 180 /**
 181  * \brief Perform a depth resolve on the renderbuffer.
 182  *
 183  * It is safe to call this function on a renderbuffer without HiZ. In that
 184  * case, the function is a no-op.
 185  *
 186  * \return false if no resolve was needed
 187  */
 188 bool
 189 intel_renderbuffer_resolve_depth(struct brw_context *brw,
 190                                  struct intel_renderbuffer *irb);
 191
 192 void intel_renderbuffer_move_to_temp(struct brw_context *brw,
 193                                      struct intel_renderbuffer *irb,
 194                                      bool invalidate);
 195
 196 unsigned
 197 intel_quantize_num_samples(struct intel_screen *intel, unsigned num_samples);
 198
 199 #ifdef __cplusplus
 200 }
 201 #endif
 202
 203 #endif /* INTEL_FBO_H */