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 PairedDepth;   /**< only used if this is a depth renderbuffer */
  70    GLuint PairedStencil; /**< only used if this is a stencil renderbuffer */
  71
  72    GLuint vbl_pending;   /**< vblank sequence number of pending flip */
  73
  74    uint8_t *span_cache;
  75    unsigned long span_cache_offset;
  76 };
  77
  78 extern struct intel_renderbuffer *intel_renderbuffer(struct gl_renderbuffer
  79                                                      *rb);
  80
  81 extern void
  82 intel_renderbuffer_set_region(struct intel_renderbuffer *irb,
  83                               struct intel_region *region);
  84
  85 extern struct intel_renderbuffer *
  86 intel_create_renderbuffer(GLenum intFormat);
  87
  88 extern void intel_fbo_init(struct intel_context *intel);
  89
  90
  91 /* XXX make inline or macro */
  92 extern struct intel_renderbuffer *intel_get_renderbuffer(struct gl_framebuffer
  93                                                          *fb,
  94                                                          int attIndex);
  95
  96 extern void intel_flip_renderbuffers(struct intel_framebuffer *intel_fb);
  97
  98
  99 /* XXX make inline or macro */
 100 extern struct intel_region *intel_get_rb_region(struct gl_framebuffer *fb,
 101                                                 GLuint attIndex);
 102
 103
 104
 105 /**
 106  * Are we currently rendering into a texture?
 107  */
 108 static INLINE GLboolean
 109 intel_rendering_to_texture(const GLcontext *ctx)
 110 {
 111    if (ctx->DrawBuffer->Name) {
 112       /* User-created FBO */
 113       const struct intel_renderbuffer *irb =
 114          intel_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
 115       return irb && irb->RenderToTexture;
 116    }
 117    else {
 118       return GL_FALSE;
 119    }
 120 }
 121
 122
 123 #endif /* INTEL_FBO_H */