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      1 /**************************************************************************
      2  *
      3  * Copyright 2009 VMware, Inc.
      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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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     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 #include "main/glheader.h"
     29 #include "st_context.h"
     30 #include "st_cb_fbo.h"
     31 #include "st_cb_viewport.h"
     32 
     33 #include "pipe/p_state.h"
     34 #include "pipe/p_defines.h"
     35 #include "util/u_atomic.h"
     36 
     37 
     38 static void st_viewport(struct gl_context *ctx)
     39 {
     40    struct st_context *st = ctx->st;
     41    struct st_framebuffer *stdraw;
     42    struct st_framebuffer *stread;
     43 
     44    if (!st->invalidate_on_gl_viewport)
     45       return;
     46 
     47    /*
     48     * Normally we'd want the state tracker manager to mark the drawables
     49     * invalid only when needed. This will force the state tracker manager
     50     * to revalidate the drawable, rather than just update the context with
     51     * the latest cached drawable info.
     52     */
     53 
     54    stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
     55    stread = st_ws_framebuffer(st->ctx->ReadBuffer);
     56 
     57    if (stdraw)
     58       stdraw->iface_stamp = p_atomic_read(&stdraw->iface->stamp) - 1;
     59    if (stread && stread != stdraw)
     60       stread->iface_stamp = p_atomic_read(&stread->iface->stamp) - 1;
     61 }
     62 
     63 void st_init_viewport_functions(struct dd_function_table *functions)
     64 {
     65    functions->Viewport = st_viewport;
     66 }
     67