src/mesa/state_tracker/st_atom_framebuffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "st_context.h"
  35 #include "st_atom.h"
  36 #include "st_cb_fbo.h"
  37 #include "st_texture.h"
  38 #include "pipe/p_context.h"
  39 #include "cso_cache/cso_context.h"
  40 #include "util/u_math.h"
  41 #include "util/u_inlines.h"
  42
  43
  44
  45 /**
  46  * When doing GL render to texture, we have to be sure that finalize_texture()
  47  * didn't yank out the pipe_resource that we earlier created a surface for.
  48  * Check for that here and create a new surface if needed.
  49  */
  50 static void
  51 update_renderbuffer_surface(struct st_context *st,
  52                             struct st_renderbuffer *strb)
  53 {
  54    struct pipe_screen *screen = st->pipe->screen;
  55    struct pipe_resource *resource = strb->rtt->pt;
  56    int rtt_width = strb->Base.Width;
  57    int rtt_height = strb->Base.Height;
  58
  59    if (!strb->surface ||
  60        strb->surface->texture != resource ||
  61        strb->surface->width != rtt_width ||
  62        strb->surface->height != rtt_height) {
  63       GLuint level;
  64       /* find matching mipmap level size */
  65       for (level = 0; level <= resource->last_level; level++) {
  66          if (u_minify(resource->width0, level) == rtt_width &&
  67              u_minify(resource->height0, level) == rtt_height) {
  68
  69             pipe_surface_reference(&strb->surface, NULL);
  70
  71             strb->surface = screen->get_tex_surface(screen,
  72                                                     resource,
  73                                                     strb->rtt_face,
  74                                                     level,
  75                                                     strb->rtt_slice,
  76                                                     PIPE_BIND_RENDER_TARGET);
  77 #if 0
  78             printf("-- alloc new surface %d x %d into tex %p\n",
  79                    strb->surface->width, strb->surface->height,
  80                    texture);
  81 #endif
  82             break;
  83          }
  84       }
  85    }
  86 }
  87
  88
  89 /**
  90  * Update framebuffer state (color, depth, stencil, etc. buffers)
  91  */
  92 static void
  93 update_framebuffer_state( struct st_context *st )
  94 {
  95    struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
  96    struct gl_framebuffer *fb = st->ctx->DrawBuffer;
  97    struct st_renderbuffer *strb;
  98    GLuint i;
  99
 100    framebuffer->width = fb->Width;
 101    framebuffer->height = fb->Height;
 102
 103    /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
 104
 105    /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
 106     * to determine which surfaces to draw to
 107     */
 108    framebuffer->nr_cbufs = 0;
 109    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
 110       strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
 111
 112       if (strb) {
 113          /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/
 114          if (strb->rtt) {
 115             /* rendering to a GL texture, may have to update surface */
 116             update_renderbuffer_surface(st, strb);
 117          }
 118
 119          if (strb->surface) {
 120             pipe_surface_reference(&framebuffer->cbufs[framebuffer->nr_cbufs],
 121                                    strb->surface);
 122             framebuffer->nr_cbufs++;
 123          }
 124          strb->defined = GL_TRUE; /* we'll be drawing something */
 125       }
 126    }
 127    for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
 128       pipe_surface_reference(&framebuffer->cbufs[i], NULL);
 129    }
 130
 131    /*
 132     * Depth/Stencil renderbuffer/surface.
 133     */
 134    strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
 135    if (strb) {
 136       strb = st_renderbuffer(strb->Base.Wrapped);
 137       if (strb->rtt) {
 138          /* rendering to a GL texture, may have to update surface */
 139          update_renderbuffer_surface(st, strb);
 140       }
 141       pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
 142    }
 143    else {
 144       strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
 145       if (strb) {
 146          strb = st_renderbuffer(strb->Base.Wrapped);
 147          assert(strb->surface);
 148          pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
 149       }
 150       else
 151          pipe_surface_reference(&framebuffer->zsbuf, NULL);
 152    }
 153
 154 #ifdef DEBUG
 155    /* Make sure the resource binding flags were set properly */
 156    for (i = 0; i < framebuffer->nr_cbufs; i++) {
 157       assert(framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
 158    }
 159    if (framebuffer->zsbuf) {
 160       assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
 161    }
 162 #endif
 163
 164    cso_set_framebuffer(st->cso_context, framebuffer);
 165 }
 166
 167
 168 const struct st_tracked_state st_update_framebuffer = {
 169    "st_update_framebuffer",                             /* name */
 170    {                                                    /* dirty */
 171       _NEW_BUFFERS,                                     /* mesa */
 172       ST_NEW_FRAMEBUFFER,                               /* st */
 173    },
 174    update_framebuffer_state                             /* update */
 175 };
 176