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  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_context *pipe = st->pipe;
  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.             struct pipe_surface surf_tmpl;
  69.             memset(&surf_tmpl, 0, sizeof(surf_tmpl));
  70.             surf_tmpl.format = resource->format;
  71.             surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
  72.             surf_tmpl.u.tex.level = level;
  73.             surf_tmpl.u.tex.first_layer = strb->rtt_face + strb->rtt_slice;
  74.             surf_tmpl.u.tex.last_layer = strb->rtt_face + strb->rtt_slice;
  75.  
  76.             pipe_surface_reference(&strb->surface, NULL);
  77.  
  78.             strb->surface = pipe->create_surface(pipe,
  79.                                                  resource,
  80.                                                  &surf_tmpl);
  81. #if 0
  82.             printf("-- alloc new surface %d x %d into tex %p\n",
  83.                    strb->surface->width, strb->surface->height,
  84.                    texture);
  85. #endif
  86.             break;
  87.          }
  88.       }
  89.    }
  90. }
  91.  
  92.  
  93. /**
  94.  * Update framebuffer state (color, depth, stencil, etc. buffers)
  95.  */
  96. static void
  97. update_framebuffer_state( struct st_context *st )
  98. {
  99.    struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
  100.    struct gl_framebuffer *fb = st->ctx->DrawBuffer;
  101.    struct st_renderbuffer *strb;
  102.    GLuint i;
  103.  
  104.    framebuffer->width = fb->Width;
  105.    framebuffer->height = fb->Height;
  106.  
  107.    /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
  108.  
  109.    /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
  110.     * to determine which surfaces to draw to
  111.     */
  112.    framebuffer->nr_cbufs = 0;
  113.    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
  114.       strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
  115.  
  116.       if (strb) {
  117.          /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/
  118.          if (strb->rtt) {
  119.             /* rendering to a GL texture, may have to update surface */
  120.             update_renderbuffer_surface(st, strb);
  121.          }
  122.  
  123.          if (strb->surface) {
  124.             pipe_surface_reference(&framebuffer->cbufs[framebuffer->nr_cbufs],
  125.                                    strb->surface);
  126.             framebuffer->nr_cbufs++;
  127.          }
  128.          strb->defined = GL_TRUE; /* we'll be drawing something */
  129.       }
  130.    }
  131.    for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {
  132.       pipe_surface_reference(&framebuffer->cbufs[i], NULL);
  133.    }
  134.  
  135.    /*
  136.     * Depth/Stencil renderbuffer/surface.
  137.     */
  138.    strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
  139.    if (strb) {
  140.       strb = st_renderbuffer(strb->Base.Wrapped);
  141.       if (strb->rtt) {
  142.          /* rendering to a GL texture, may have to update surface */
  143.          update_renderbuffer_surface(st, strb);
  144.       }
  145.       pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
  146.    }
  147.    else {
  148.       strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
  149.       if (strb) {
  150.          strb = st_renderbuffer(strb->Base.Wrapped);
  151.          assert(strb->surface);
  152.          pipe_surface_reference(&framebuffer->zsbuf, strb->surface);
  153.       }
  154.       else
  155.          pipe_surface_reference(&framebuffer->zsbuf, NULL);
  156.    }
  157.  
  158. #ifdef DEBUG
  159.    /* Make sure the resource binding flags were set properly */
  160.    for (i = 0; i < framebuffer->nr_cbufs; i++) {
  161.       assert(framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);
  162.    }
  163.    if (framebuffer->zsbuf) {
  164.       assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);
  165.    }
  166. #endif
  167.  
  168.    cso_set_framebuffer(st->cso_context, framebuffer);
  169. }
  170.  
  171.  
  172. const struct st_tracked_state st_update_framebuffer = {
  173.    "st_update_framebuffer",                             /* name */
  174.    {                                                    /* dirty */
  175.       _NEW_BUFFERS,                                     /* mesa */
  176.       ST_NEW_FRAMEBUFFER,                               /* st */
  177.    },
  178.    update_framebuffer_state                             /* update */
  179. };
  180.  
  181.