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 <stdbool.h>
  32 #include <assert.h>
  33 #include "main/formats.h"
  34 #include "intel_context.h"
  35 #include "intel_screen.h"
  36
  37 struct intel_context;
  38 struct intel_texture_image;
  39
  40 /**
  41  * Intel renderbuffer, derived from gl_renderbuffer.
  42  */
  43 struct intel_renderbuffer
  44 {
  45    struct gl_renderbuffer Base;
  46    struct intel_region *region;
  47    drm_intel_bo *map_bo;
  48    void *map_buffer;
  49    GLuint map_x, map_y, map_w, map_h;
  50    GLbitfield map_mode;
  51
  52    /** Only used by depth renderbuffers for which HiZ is enabled. */
  53    struct intel_region *hiz_region;
  54
  55    /**
  56     * \name Packed depth/stencil unwrappers
  57     *
  58     * If the intel_context is using separate stencil and this renderbuffer has
  59     * a packed depth/stencil format, then wrapped_depth and wrapped_stencil
  60     * are the real renderbuffers.
  61     */
  62    struct gl_renderbuffer *wrapped_depth;
  63    struct gl_renderbuffer *wrapped_stencil;
  64    /** \} */
  65
  66    GLuint draw_x, draw_y; /**< Offset of drawing within the region */
  67 };
  68
  69
  70 /**
  71  * gl_renderbuffer is a base class which we subclass.  The Class field
  72  * is used for simple run-time type checking.
  73  */
  74 #define INTEL_RB_CLASS 0x12345678
  75
  76
  77 /**
  78  * Return a gl_renderbuffer ptr casted to intel_renderbuffer.
  79  * NULL will be returned if the rb isn't really an intel_renderbuffer.
  80  * This is determined by checking the ClassID.
  81  */
  82 static INLINE struct intel_renderbuffer *
  83 intel_renderbuffer(struct gl_renderbuffer *rb)
  84 {
  85    struct intel_renderbuffer *irb = (struct intel_renderbuffer *) rb;
  86    if (irb && irb->Base.ClassID == INTEL_RB_CLASS) {
  87       /*_mesa_warning(NULL, "Returning non-intel Rb\n");*/
  88       return irb;
  89    }
  90    else
  91       return NULL;
  92 }
  93
  94
  95 /**
  96  * \brief Return the framebuffer attachment specified by attIndex.
  97  *
  98  * If the framebuffer lacks the specified attachment, then return null.
  99  *
 100  * If the attached renderbuffer is a wrapper, then return wrapped
 101  * renderbuffer.
 102  */
 103 static INLINE struct intel_renderbuffer *
 104 intel_get_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index attIndex)
 105 {
 106    struct gl_renderbuffer *rb;
 107    struct intel_renderbuffer *irb;
 108
 109    assert((unsigned)attIndex < ARRAY_SIZE(fb->Attachment));
 110
 111    rb = fb->Attachment[attIndex].Renderbuffer;
 112    if (!rb)
 113       return NULL;
 114
 115    irb = intel_renderbuffer(rb);
 116    if (!irb)
 117       return NULL;
 118
 119    switch (attIndex) {
 120    case BUFFER_DEPTH:
 121       if (irb->wrapped_depth) {
 122          irb = intel_renderbuffer(irb->wrapped_depth);
 123       }
 124       break;
 125    case BUFFER_STENCIL:
 126       if (irb->wrapped_stencil) {
 127          irb = intel_renderbuffer(irb->wrapped_stencil);
 128       }
 129       break;
 130    default:
 131       break;
 132    }
 133
 134    return irb;
 135 }
 136
 137 /**
 138  * If the framebuffer has a depth buffer attached, then return its HiZ region.
 139  * The HiZ region may be null.
 140  */
 141 static INLINE struct intel_region*
 142 intel_framebuffer_get_hiz_region(struct gl_framebuffer *fb)
 143 {
 144    struct intel_renderbuffer *rb = NULL;
 145    if (fb)
 146       rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 147
 148    if (rb)
 149       return rb->hiz_region;
 150    else
 151       return NULL;
 152 }
 153
 154 static INLINE bool
 155 intel_framebuffer_has_hiz(struct gl_framebuffer *fb)
 156 {
 157    return intel_framebuffer_get_hiz_region(fb) != NULL;
 158 }
 159
 160 extern struct intel_renderbuffer *
 161 intel_create_renderbuffer(gl_format format);
 162
 163 struct gl_renderbuffer*
 164 intel_create_wrapped_renderbuffer(struct gl_context * ctx,
 165                                   int width, int height,
 166                                   gl_format format);
 167
 168 GLboolean
 169 intel_alloc_renderbuffer_storage(struct gl_context * ctx,
 170                                  struct gl_renderbuffer *rb,
 171                                  GLenum internalFormat,
 172                                  GLuint width, GLuint height);
 173
 174 extern void
 175 intel_fbo_init(struct intel_context *intel);
 176
 177
 178 extern void
 179 intel_flip_renderbuffers(struct gl_framebuffer *fb);
 180
 181 void
 182 intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb,
 183                                    struct intel_texture_image *intel_image,
 184                                    int zoffset);
 185
 186 uint32_t
 187 intel_renderbuffer_tile_offsets(struct intel_renderbuffer *irb,
 188                                 uint32_t *tile_x,
 189                                 uint32_t *tile_y);
 190
 191 static INLINE struct intel_region *
 192 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
 193 {
 194    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
 195    if (irb)
 196       return irb->region;
 197    else
 198       return NULL;
 199 }
 200
 201 #endif /* INTEL_FBO_H */