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 "main/formats.h"
  32 #include "intel_screen.h"
  33
  34 struct intel_context;
  35
  36 /**
  37  * Intel renderbuffer, derived from gl_renderbuffer.
  38  */
  39 struct intel_renderbuffer
  40 {
  41    struct gl_renderbuffer Base;
  42    struct intel_region *region;
  43
  44    uint8_t *span_cache;
  45    unsigned long span_cache_offset;
  46 };
  47
  48
  49 /**
  50  * gl_renderbuffer is a base class which we subclass.  The Class field
  51  * is used for simple run-time type checking.
  52  */
  53 #define INTEL_RB_CLASS 0x12345678
  54
  55
  56 /**
  57  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  58  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  59  * This is determined by checking the ClassID.
  60  */
  61 static INLINE struct intel_renderbuffer *
  62 intel_renderbuffer(struct gl_renderbuffer *rb)
  63 {
  64    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  65    if (irb && irb->Base.ClassID == INTEL_RB_CLASS) {
  66       /*_mesa_warning(NULL, "Returning non-intel Rb\n");*/
  67       return irb;
  68    }
  69    else
  70       return NULL;
  71 }
  72
  73
  74 /**
  75  * Return a framebuffer's renderbuffer, named by a BUFFER_x index.
  76  */
  77 static INLINE struct intel_renderbuffer *
  78 intel_get_renderbuffer(struct gl_framebuffer *fb, int attIndex)
  79 {
  80    if (attIndex >= 0)
  81       return intel_renderbuffer(fb->Attachment[attIndex].Renderbuffer);
  82    else
  83       return NULL;
  84 }
  85
  86
  87 extern void
  88 intel_renderbuffer_set_region(struct intel_renderbuffer *irb,
  89                               struct intel_region *region);
  90
  91
  92 extern struct intel_renderbuffer *
  93 intel_create_renderbuffer(gl_format format);
  94
  95
  96 extern void
  97 intel_fbo_init(struct intel_context *intel);
  98
  99
 100 extern void
 101 intel_flip_renderbuffers(struct gl_framebuffer *fb);
 102
 103
 104 static INLINE struct intel_region *
 105 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
 106 {
 107    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
 108    if (irb)
 109       return irb->region;
 110    else
 111       return NULL;
 112 }
 113
 114
 115 #endif /* INTEL_FBO_H */