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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* 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.
*
**************************************************************************/
#include "main/glheader.h"
#include "st_context.h"
#include "st_cb_viewport.h"
#include "pipe/p_state.h"
#include "pipe/p_defines.h"
#include "util/u_atomic.h"
/**
* Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer.
* Return NULL if the struct gl_framebuffer is a user-created framebuffer.
* We'll only return non-null for window system framebuffers.
* Note that this function may fail.
*/
static INLINE struct st_framebuffer *
st_ws_framebuffer(struct gl_framebuffer *fb)
{
/* FBO cannot be casted. See st_new_framebuffer */
return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL);
}
static void st_viewport(struct gl_context * ctx, GLint x, GLint y,
GLsizei width, GLsizei height)
{
struct st_context *st = ctx->st;
struct st_framebuffer *stdraw;
struct st_framebuffer *stread;
if (!st->invalidate_on_gl_viewport)
return;
/*
* Normally we'd want the state tracker manager to mark the drawables
* invalid only when needed. This will force the state tracker manager
* to revalidate the drawable, rather than just update the context with
* the latest cached drawable info.
*/
stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
stread = st_ws_framebuffer(st->ctx->ReadBuffer);
if (stdraw && stdraw->iface)
stdraw->iface_stamp = p_atomic_read(&stdraw->iface->stamp) - 1;
if (stread && stread != stdraw && stread->iface)
stread->iface_stamp = p_atomic_read(&stread->iface->stamp) - 1;
}
void st_init_viewport_functions(struct dd_function_table *functions)
{
functions->Viewport = st_viewport;
}
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