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/************************************************************************** |
* |
* Copyright 2007 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 VMWARE 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. |
* |
**************************************************************************/ |
|
/* |
* Authors: |
* Keith Whitwell <keithw@vmware.com> |
* Brian Paul |
* Zack Rusin |
*/ |
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#include <assert.h> |
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#include "st_context.h" |
#include "st_atom.h" |
#include "pipe/p_context.h" |
#include "pipe/p_defines.h" |
#include "cso_cache/cso_context.h" |
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#include "main/core.h" |
#include "main/stencil.h" |
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/** |
* Convert an OpenGL compare mode to a pipe tokens. |
*/ |
GLuint |
st_compare_func_to_pipe(GLenum func) |
{ |
/* Same values, just biased */ |
STATIC_ASSERT(PIPE_FUNC_NEVER == GL_NEVER - GL_NEVER); |
STATIC_ASSERT(PIPE_FUNC_LESS == GL_LESS - GL_NEVER); |
STATIC_ASSERT(PIPE_FUNC_EQUAL == GL_EQUAL - GL_NEVER); |
STATIC_ASSERT(PIPE_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER); |
STATIC_ASSERT(PIPE_FUNC_GREATER == GL_GREATER - GL_NEVER); |
STATIC_ASSERT(PIPE_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER); |
STATIC_ASSERT(PIPE_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER); |
STATIC_ASSERT(PIPE_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER); |
assert(func >= GL_NEVER); |
assert(func <= GL_ALWAYS); |
return func - GL_NEVER; |
} |
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/** |
* Convert GLenum stencil op tokens to pipe tokens. |
*/ |
static GLuint |
gl_stencil_op_to_pipe(GLenum func) |
{ |
switch (func) { |
case GL_KEEP: |
return PIPE_STENCIL_OP_KEEP; |
case GL_ZERO: |
return PIPE_STENCIL_OP_ZERO; |
case GL_REPLACE: |
return PIPE_STENCIL_OP_REPLACE; |
case GL_INCR: |
return PIPE_STENCIL_OP_INCR; |
case GL_DECR: |
return PIPE_STENCIL_OP_DECR; |
case GL_INCR_WRAP: |
return PIPE_STENCIL_OP_INCR_WRAP; |
case GL_DECR_WRAP: |
return PIPE_STENCIL_OP_DECR_WRAP; |
case GL_INVERT: |
return PIPE_STENCIL_OP_INVERT; |
default: |
assert("invalid GL token in gl_stencil_op_to_pipe()" == NULL); |
return 0; |
} |
} |
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static void |
update_depth_stencil_alpha(struct st_context *st) |
{ |
struct pipe_depth_stencil_alpha_state *dsa = &st->state.depth_stencil; |
struct pipe_stencil_ref sr; |
struct gl_context *ctx = st->ctx; |
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memset(dsa, 0, sizeof(*dsa)); |
memset(&sr, 0, sizeof(sr)); |
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if (ctx->Depth.Test && ctx->DrawBuffer->Visual.depthBits > 0) { |
dsa->depth.enabled = 1; |
dsa->depth.writemask = ctx->Depth.Mask; |
dsa->depth.func = st_compare_func_to_pipe(ctx->Depth.Func); |
} |
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if (ctx->Stencil.Enabled && ctx->DrawBuffer->Visual.stencilBits > 0) { |
dsa->stencil[0].enabled = 1; |
dsa->stencil[0].func = st_compare_func_to_pipe(ctx->Stencil.Function[0]); |
dsa->stencil[0].fail_op = gl_stencil_op_to_pipe(ctx->Stencil.FailFunc[0]); |
dsa->stencil[0].zfail_op = gl_stencil_op_to_pipe(ctx->Stencil.ZFailFunc[0]); |
dsa->stencil[0].zpass_op = gl_stencil_op_to_pipe(ctx->Stencil.ZPassFunc[0]); |
dsa->stencil[0].valuemask = ctx->Stencil.ValueMask[0] & 0xff; |
dsa->stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff; |
sr.ref_value[0] = _mesa_get_stencil_ref(ctx, 0); |
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if (ctx->Stencil._TestTwoSide) { |
const GLuint back = ctx->Stencil._BackFace; |
dsa->stencil[1].enabled = 1; |
dsa->stencil[1].func = st_compare_func_to_pipe(ctx->Stencil.Function[back]); |
dsa->stencil[1].fail_op = gl_stencil_op_to_pipe(ctx->Stencil.FailFunc[back]); |
dsa->stencil[1].zfail_op = gl_stencil_op_to_pipe(ctx->Stencil.ZFailFunc[back]); |
dsa->stencil[1].zpass_op = gl_stencil_op_to_pipe(ctx->Stencil.ZPassFunc[back]); |
dsa->stencil[1].valuemask = ctx->Stencil.ValueMask[back] & 0xff; |
dsa->stencil[1].writemask = ctx->Stencil.WriteMask[back] & 0xff; |
sr.ref_value[1] = _mesa_get_stencil_ref(ctx, back); |
} |
else { |
/* This should be unnecessary. Drivers must not expect this to |
* contain valid data, except the enabled bit |
*/ |
dsa->stencil[1] = dsa->stencil[0]; |
dsa->stencil[1].enabled = 0; |
sr.ref_value[1] = sr.ref_value[0]; |
} |
} |
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if (ctx->Color.AlphaEnabled) { |
dsa->alpha.enabled = 1; |
dsa->alpha.func = st_compare_func_to_pipe(ctx->Color.AlphaFunc); |
dsa->alpha.ref_value = ctx->Color.AlphaRefUnclamped; |
} |
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cso_set_depth_stencil_alpha(st->cso_context, dsa); |
cso_set_stencil_ref(st->cso_context, &sr); |
} |
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const struct st_tracked_state st_update_depth_stencil_alpha = { |
"st_update_depth_stencil", /* name */ |
{ /* dirty */ |
(_NEW_DEPTH|_NEW_STENCIL|_NEW_COLOR|_NEW_BUFFERS),/* mesa */ |
0, /* st */ |
}, |
update_depth_stencil_alpha /* update */ |
}; |