Subversion Repositories Kolibri OS

/**************************************************************************

 *

 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

 * All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the

 * "Software"), to deal in the Software without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sub license, and/or sell copies of the Software, and to

 * permit persons to whom the Software is furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice (including the

 * next paragraph) shall be included in all copies or substantial portions

 * of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.

 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR

 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 **************************************************************************/

 /*

  * Authors:

  *   Keith Whitwell 

  *   Brian Paul

  */

#include "st_context.h"

#include "st_atom.h"

#include "st_cb_bitmap.h"

#include "st_cb_fbo.h"

#include "st_texture.h"

#include "pipe/p_context.h"

#include "cso_cache/cso_context.h"

#include "util/u_math.h"

#include "util/u_inlines.h"

#include "util/u_format.h"

/**

 * When doing GL render to texture, we have to be sure that finalize_texture()

 * didn't yank out the pipe_resource that we earlier created a surface for.

 * Check for that here and create a new surface if needed.

 */

static void

update_renderbuffer_surface(struct st_context *st,

                            struct st_renderbuffer *strb)

{

   struct pipe_context *pipe = st->pipe;

   struct pipe_resource *resource = strb->rtt ? strb->rtt->pt : strb->texture;

   int rtt_width = strb->Base.Width;

   int rtt_height = strb->Base.Height;

   enum pipe_format format = st->ctx->Color.sRGBEnabled ? resource->format : util_format_linear(resource->format);

   if (!strb->surface ||

       strb->surface->texture->nr_samples != strb->Base.NumSamples ||

       strb->surface->format != format ||

       strb->surface->texture != resource ||

       strb->surface->width != rtt_width ||

       strb->surface->height != rtt_height) {

      GLuint level;

      /* find matching mipmap level size */

      for (level = 0; level <= resource->last_level; level++) {

         if (u_minify(resource->width0, level) == rtt_width &&

             u_minify(resource->height0, level) == rtt_height) {

            struct pipe_surface surf_tmpl;

            memset(&surf_tmpl, 0, sizeof(surf_tmpl));

            surf_tmpl.format = format;

            surf_tmpl.u.tex.level = level;

            surf_tmpl.u.tex.first_layer = strb->rtt_face + strb->rtt_slice;

            surf_tmpl.u.tex.last_layer = strb->rtt_face + strb->rtt_slice;

            pipe_surface_reference(&strb->surface, NULL);

            strb->surface = pipe->create_surface(pipe,

                                                 resource,

                                                 &surf_tmpl);

#if 0

            printf("-- alloc new surface %d x %d into tex %p\n",

                   strb->surface->width, strb->surface->height,

                   texture);

#endif

            break;

         }

      }

   }

}

/**

 * Update framebuffer state (color, depth, stencil, etc. buffers)

 */

static void

update_framebuffer_state( struct st_context *st )

{

   struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;

   struct gl_framebuffer *fb = st->ctx->DrawBuffer;

   struct st_renderbuffer *strb;

   GLuint i;

   st_flush_bitmap_cache(st);

   st->state.fb_orientation = st_fb_orientation(fb);

   framebuffer->width = fb->Width;

   framebuffer->height = fb->Height;

   /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/

   /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state

    * to determine which surfaces to draw to

    */

   framebuffer->nr_cbufs = 0;

   for (i = 0; i < fb->_NumColorDrawBuffers; i++) {

      strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);

      if (strb) {

         /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/

         if (strb->rtt ||

             (strb->texture && util_format_is_srgb(strb->texture->format))) {

            /* rendering to a GL texture, may have to update surface */

            update_renderbuffer_surface(st, strb);

         }

         if (strb->surface) {

            pipe_surface_reference(&framebuffer->cbufs[framebuffer->nr_cbufs],

                                   strb->surface);

            framebuffer->nr_cbufs++;

         }

         strb->defined = GL_TRUE; /* we'll be drawing something */

      }

   }

   for (i = framebuffer->nr_cbufs; i < PIPE_MAX_COLOR_BUFS; i++) {

      pipe_surface_reference(&framebuffer->cbufs[i], NULL);

   }

   /*

    * Depth/Stencil renderbuffer/surface.

    */

   strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);

   if (strb) {

      if (strb->rtt) {

         /* rendering to a GL texture, may have to update surface */

         update_renderbuffer_surface(st, strb);

      }

      pipe_surface_reference(&framebuffer->zsbuf, strb->surface);

   }

   else {

      strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);

      if (strb) {

         assert(strb->surface);

         pipe_surface_reference(&framebuffer->zsbuf, strb->surface);

      }

      else

         pipe_surface_reference(&framebuffer->zsbuf, NULL);

   }

#ifdef DEBUG

   /* Make sure the resource binding flags were set properly */

   for (i = 0; i < framebuffer->nr_cbufs; i++) {

      assert(framebuffer->cbufs[i]->texture->bind & PIPE_BIND_RENDER_TARGET);

   }

   if (framebuffer->zsbuf) {

      assert(framebuffer->zsbuf->texture->bind & PIPE_BIND_DEPTH_STENCIL);

   }

#endif

   cso_set_framebuffer(st->cso_context, framebuffer);

}

const struct st_tracked_state st_update_framebuffer = {

   "st_update_framebuffer",				/* name */

   {							/* dirty */

      _NEW_BUFFERS,					/* mesa */

      ST_NEW_FRAMEBUFFER,				/* st */

   },

   update_framebuffer_state				/* update */

};