src/mesa/drivers/dri/i915/intel_fbo.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 VMware, Inc.
   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 VMWARE 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 "intel_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_context;
  44 struct intel_mipmap_tree;
  45 struct intel_texture_image;
  46
  47 /**
  48  * Intel renderbuffer, derived from gl_renderbuffer.
  49  */
  50 struct intel_renderbuffer
  51 {
  52    struct swrast_renderbuffer Base;
  53    struct intel_mipmap_tree *mt; /**< The renderbuffer storage. */
  54
  55    /**
  56     * \name Miptree view
  57     * \{
  58     *
  59     * Multiple renderbuffers may simultaneously wrap a single texture and each
  60     * provide a different view into that texture. The fields below indicate
  61     * which miptree slice is wrapped by this renderbuffer.  The fields' values
  62     * are consistent with the 'level' and 'layer' parameters of
  63     * glFramebufferTextureLayer().
  64     *
  65     * For renderbuffers not created with glFramebufferTexture*(), mt_level and
  66     * mt_layer are 0.
  67     */
  68    unsigned int mt_level;
  69    unsigned int mt_layer;
  70    /** \} */
  71
  72    GLuint draw_x, draw_y; /**< Offset of drawing within the region */
  73 };
  74
  75
  76 /**
  77  * gl_renderbuffer is a base class which we subclass.  The Class field
  78  * is used for simple run-time type checking.
  79  */
  80 #define INTEL_RB_CLASS 0x12345678
  81
  82
  83 /**
  84  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  85  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  86  * This is determined by checking the ClassID.
  87  */
  88 static inline struct intel_renderbuffer *
  89 intel_renderbuffer(struct gl_renderbuffer *rb)
  90 {
  91    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  92    if (irb && irb->Base.Base.ClassID == INTEL_RB_CLASS)
  93       return irb;
  94    else
  95       return NULL;
  96 }
  97
  98
  99 /**
 100  * \brief Return the framebuffer attachment specified by attIndex.
 101  *
 102  * If the framebuffer lacks the specified attachment, then return null.
 103  *
 104  * If the attached renderbuffer is a wrapper, then return wrapped
 105  * renderbuffer.
 106  */
 107 static inline struct intel_renderbuffer *
 108 intel_get_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index attIndex)
 109 {
 110    struct gl_renderbuffer *rb;
 111
 112    assert((unsigned)attIndex < ARRAY_SIZE(fb->Attachment));
 113
 114    rb = fb->Attachment[attIndex].Renderbuffer;
 115    if (!rb)
 116       return NULL;
 117
 118    return intel_renderbuffer(rb);
 119 }
 120
 121
 122 static inline mesa_format
 123 intel_rb_format(const struct intel_renderbuffer *rb)
 124 {
 125    return rb->Base.Base.Format;
 126 }
 127
 128 extern struct intel_renderbuffer *
 129 intel_create_renderbuffer(mesa_format format);
 130
 131 struct intel_renderbuffer *
 132 intel_create_private_renderbuffer(mesa_format format);
 133
 134 struct gl_renderbuffer*
 135 intel_create_wrapped_renderbuffer(struct gl_context * ctx,
 136                                   int width, int height,
 137                                   mesa_format format);
 138
 139 extern void
 140 intel_fbo_init(struct intel_context *intel);
 141
 142
 143 extern void
 144 intel_flip_renderbuffers(struct gl_framebuffer *fb);
 145
 146 void
 147 intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb);
 148
 149 static inline uint32_t
 150 intel_renderbuffer_get_tile_offsets(struct intel_renderbuffer *irb,
 151                                     uint32_t *tile_x,
 152                                     uint32_t *tile_y)
 153 {
 154    return intel_miptree_get_tile_offsets(irb->mt, irb->mt_level, irb->mt_layer,
 155                                          tile_x, tile_y);
 156 }
 157
 158 struct intel_region*
 159 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex);
 160
 161 #ifdef __cplusplus
 162 }
 163 #endif
 164
 165 #endif /* INTEL_FBO_H */