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 "intel_screen.h"
  32
  33 struct intel_context;
  34
  35 /**
  36  * Intel framebuffer, derived from gl_framebuffer.
  37  */
  38 struct intel_framebuffer
  39 {
  40    struct gl_framebuffer Base;
  41
  42    struct intel_renderbuffer *color_rb[2];
  43
  44    /* VBI
  45     */
  46    GLuint vbl_waited;
  47
  48    int64_t swap_ust;
  49    int64_t swap_missed_ust;
  50
  51    GLuint swap_count;
  52    GLuint swap_missed_count;
  53 };
  54
  55
  56 /**
  57  * Intel renderbuffer, derived from gl_renderbuffer.
  58  * Note: The PairedDepth and PairedStencil fields use renderbuffer IDs,
  59  * not pointers because in some circumstances a deleted renderbuffer could
  60  * result in a dangling pointer here.
  61  */
  62 struct intel_renderbuffer
  63 {
  64    struct gl_renderbuffer Base;
  65    struct intel_region *region;
  66    GLuint pfPitch;              /* possibly paged flipped pitch */
  67    GLboolean RenderToTexture;   /* RTT? */
  68
  69    GLuint pf_pending;  /**< sequence number of pending flip */
  70
  71    GLuint vbl_pending;   /**< vblank sequence number of pending flip */
  72
  73    uint8_t *span_cache;
  74    unsigned long span_cache_offset;
  75 };
  76
  77
  78 /**
  79  * gl_renderbuffer is a base class which we subclass.  The Class field
  80  * is used for simple run-time type checking.
  81  */
  82 #define INTEL_RB_CLASS 0x12345678
  83
  84
  85 /**
  86  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  87  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  88  * This is determined by checking the ClassID.
  89  */
  90 static INLINE struct intel_renderbuffer *
  91 intel_renderbuffer(struct gl_renderbuffer *rb)
  92 {
  93    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  94    if (irb && irb->Base.ClassID == INTEL_RB_CLASS) {
  95       /*_mesa_warning(NULL, "Returning non-intel Rb\n");*/
  96       return irb;
  97    }
  98    else
  99       return NULL;
 100 }
 101
 102
 103 /**
 104  * Return a framebuffer's renderbuffer, named by a BUFFER_x index.
 105  */
 106 static INLINE struct intel_renderbuffer *
 107 intel_get_renderbuffer(struct gl_framebuffer *fb, int attIndex)
 108 {
 109    if (attIndex >= 0)
 110       return intel_renderbuffer(fb->Attachment[attIndex].Renderbuffer);
 111    else
 112       return NULL;
 113 }
 114
 115
 116 extern void
 117 intel_renderbuffer_set_region(struct intel_renderbuffer *irb,
 118                               struct intel_region *region);
 119
 120
 121 extern struct intel_renderbuffer *
 122 intel_create_renderbuffer(GLenum intFormat);
 123
 124
 125 extern void
 126 intel_fbo_init(struct intel_context *intel);
 127
 128
 129 extern void
 130 intel_flip_renderbuffers(struct intel_framebuffer *intel_fb);
 131
 132
 133 static INLINE struct intel_region *
 134 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
 135 {
 136    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
 137    if (irb)
 138       return irb->region;
 139    else
 140       return NULL;
 141 }
 142
 143
 144 /**
 145  * Are we currently rendering into a texture?
 146  */
 147 static INLINE GLboolean
 148 intel_rendering_to_texture(const GLcontext *ctx)
 149 {
 150    if (ctx->DrawBuffer->Name) {
 151       /* User-created FBO */
 152       const struct intel_renderbuffer *irb =
 153          intel_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
 154       return irb && irb->RenderToTexture;
 155    }
 156    else {
 157       return GL_FALSE;
 158    }
 159 }
 160
 161
 162 #endif /* INTEL_FBO_H */