69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/**************************************************************************
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*
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* Copyright 2007 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors:
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* Keith Whitwell <keithw@vmware.com>
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*/
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#include "st_context.h"
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#include "pipe/p_context.h"
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#include "st_atom.h"
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#include "st_program.h"
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#include "util/u_debug.h"
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#include "cso_cache/cso_context.h"
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/* Second state atom for user clip planes:
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*/
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void st_update_clip( struct st_context *st )
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{
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struct pipe_clip_state clip;
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const struct gl_context *ctx = st->ctx;
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bool use_eye = FALSE;
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STATIC_ASSERT(sizeof(clip.ucp) <= sizeof(ctx->Transform._ClipUserPlane));
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/* if we have a vertex shader that writes clip vertex we need to pass
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the pre-projection transformed coordinates into the driver. */
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if (ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX])
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use_eye = TRUE;
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/* _ClipUserPlane = _NEW_TRANSFORM | _NEW_PROJECTION
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* EyeUserPlane = _NEW_TRANSFORM
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*/
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memcpy(clip.ucp,
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use_eye ? ctx->Transform.EyeUserPlane
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: ctx->Transform._ClipUserPlane, sizeof(clip.ucp));
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if (memcmp(&st->state.clip, &clip, sizeof(clip)) != 0) {
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st->state.clip = clip;
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st->pipe->set_clip_state(st->pipe, &clip);
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}
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}
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