141 lines
4.9 KiB
C
141 lines
4.9 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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* Brian Paul
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* Zack Rusin
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*/
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#include <assert.h>
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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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#include "cso_cache/cso_context.h"
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#include "main/samplerobj.h"
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#include "main/stencil.h"
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/**
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* Convert GLenum stencil op tokens to pipe tokens.
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*/
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static GLuint
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gl_stencil_op_to_pipe(GLenum func)
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{
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switch (func) {
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case GL_KEEP:
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return PIPE_STENCIL_OP_KEEP;
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case GL_ZERO:
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return PIPE_STENCIL_OP_ZERO;
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case GL_REPLACE:
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return PIPE_STENCIL_OP_REPLACE;
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case GL_INCR:
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return PIPE_STENCIL_OP_INCR;
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case GL_DECR:
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return PIPE_STENCIL_OP_DECR;
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case GL_INCR_WRAP:
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return PIPE_STENCIL_OP_INCR_WRAP;
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case GL_DECR_WRAP:
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return PIPE_STENCIL_OP_DECR_WRAP;
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case GL_INVERT:
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return PIPE_STENCIL_OP_INVERT;
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default:
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assert("invalid GL token in gl_stencil_op_to_pipe()" == NULL);
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return 0;
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}
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}
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void
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st_update_depth_stencil_alpha(struct st_context *st)
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{
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struct pipe_depth_stencil_alpha_state *dsa = &st->state.depth_stencil;
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struct pipe_stencil_ref sr;
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struct gl_context *ctx = st->ctx;
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memset(dsa, 0, sizeof(*dsa));
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memset(&sr, 0, sizeof(sr));
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if (ctx->DrawBuffer->Visual.depthBits > 0) {
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if (ctx->Depth.Test) {
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dsa->depth_enabled = 1;
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dsa->depth_func = func_to_gallium(ctx->Depth.Func);
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if (dsa->depth_func != PIPE_FUNC_EQUAL)
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dsa->depth_writemask = ctx->Depth.Mask;
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}
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if (ctx->Depth.BoundsTest) {
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dsa->depth_bounds_test = 1;
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dsa->depth_bounds_min = ctx->Depth.BoundsMin;
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dsa->depth_bounds_max = ctx->Depth.BoundsMax;
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}
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}
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if (ctx->Stencil.Enabled && ctx->DrawBuffer->Visual.stencilBits > 0) {
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dsa->stencil[0].enabled = 1;
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dsa->stencil[0].func = func_to_gallium(ctx->Stencil.Function[0]);
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dsa->stencil[0].fail_op = gl_stencil_op_to_pipe(ctx->Stencil.FailFunc[0]);
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dsa->stencil[0].zfail_op = gl_stencil_op_to_pipe(ctx->Stencil.ZFailFunc[0]);
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dsa->stencil[0].zpass_op = gl_stencil_op_to_pipe(ctx->Stencil.ZPassFunc[0]);
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dsa->stencil[0].valuemask = ctx->Stencil.ValueMask[0] & 0xff;
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dsa->stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
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sr.ref_value[0] = _mesa_get_stencil_ref(ctx, 0);
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if (_mesa_stencil_is_two_sided(ctx)) {
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const GLuint back = ctx->Stencil._BackFace;
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dsa->stencil[1].enabled = 1;
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dsa->stencil[1].func = func_to_gallium(ctx->Stencil.Function[back]);
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dsa->stencil[1].fail_op = gl_stencil_op_to_pipe(ctx->Stencil.FailFunc[back]);
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dsa->stencil[1].zfail_op = gl_stencil_op_to_pipe(ctx->Stencil.ZFailFunc[back]);
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dsa->stencil[1].zpass_op = gl_stencil_op_to_pipe(ctx->Stencil.ZPassFunc[back]);
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dsa->stencil[1].valuemask = ctx->Stencil.ValueMask[back] & 0xff;
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dsa->stencil[1].writemask = ctx->Stencil.WriteMask[back] & 0xff;
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sr.ref_value[1] = _mesa_get_stencil_ref(ctx, back);
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}
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else {
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/* This should be unnecessary. Drivers must not expect this to
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* contain valid data, except the enabled bit
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*/
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dsa->stencil[1] = dsa->stencil[0];
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dsa->stencil[1].enabled = 0;
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sr.ref_value[1] = sr.ref_value[0];
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}
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}
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if (ctx->Color.AlphaEnabled && !st->lower_alpha_test &&
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!(ctx->DrawBuffer->_IntegerBuffers & 0x1)) {
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dsa->alpha_enabled = 1;
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dsa->alpha_func = func_to_gallium(ctx->Color.AlphaFunc);
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dsa->alpha_ref_value = ctx->Color.AlphaRefUnclamped;
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}
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cso_set_depth_stencil_alpha(st->cso_context, dsa);
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cso_set_stencil_ref(st->cso_context, sr);
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}
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