94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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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 TUNGSTEN GRAPHICS 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 <keith@tungstengraphics.com>
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* Brian Paul
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*/
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#include "st_context.h"
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#include "st_atom.h"
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#include "pipe/p_context.h"
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#include "pipe/p_defines.h"
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/**
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* Convert GLenum depth func tokens to pipe tokens.
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*/
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static GLuint
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gl_depth_func_to_sp(GLenum func)
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{
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/* Same values, just biased */
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assert(PIPE_FUNC_NEVER == GL_NEVER - GL_NEVER);
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assert(PIPE_FUNC_LESS == GL_LESS - GL_NEVER);
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assert(PIPE_FUNC_EQUAL == GL_EQUAL - GL_NEVER);
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assert(PIPE_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER);
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assert(PIPE_FUNC_GREATER == GL_GREATER - GL_NEVER);
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assert(PIPE_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER);
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assert(PIPE_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER);
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assert(PIPE_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER);
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assert(func >= GL_NEVER);
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assert(func <= GL_ALWAYS);
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return func - GL_NEVER;
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}
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static void
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update_depth( struct st_context *st )
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{
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struct pipe_depth_state depth;
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memset(&depth, 0, sizeof(depth));
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depth.enabled = st->ctx->Depth.Test;
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depth.writemask = st->ctx->Depth.Mask;
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depth.func = gl_depth_func_to_sp(st->ctx->Depth.Func);
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depth.clear = st->ctx->Depth.Clear;
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if (st->ctx->Query.CurrentOcclusionObject &&
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st->ctx->Query.CurrentOcclusionObject->Active)
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depth.occlusion_count = 1;
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if (memcmp(&depth, &st->state.depth, sizeof(depth)) != 0) {
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/* state has changed */
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st->state.depth = depth; /* struct copy */
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st->pipe->set_depth_state(st->pipe, &depth); /* set new state */
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}
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}
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const struct st_tracked_state st_update_depth = {
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.name = "st_update_depth",
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.dirty = {
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.mesa = (_NEW_DEPTH),
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.st = 0,
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},
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.update = update_depth
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};
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