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/**********************************************************
* Copyright 2008-2009 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, sublicense, 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 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
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* 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 "util/u_inlines.h"
#include "pipe/p_defines.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "svga_context.h"
#include "svga_hw_reg.h"
static INLINE unsigned
svga_translate_compare_func(unsigned func)
{
switch (func) {
case PIPE_FUNC_NEVER: return SVGA3D_CMP_NEVER;
case PIPE_FUNC_LESS: return SVGA3D_CMP_LESS;
case PIPE_FUNC_LEQUAL: return SVGA3D_CMP_LESSEQUAL;
case PIPE_FUNC_GREATER: return SVGA3D_CMP_GREATER;
case PIPE_FUNC_GEQUAL: return SVGA3D_CMP_GREATEREQUAL;
case PIPE_FUNC_NOTEQUAL: return SVGA3D_CMP_NOTEQUAL;
case PIPE_FUNC_EQUAL: return SVGA3D_CMP_EQUAL;
case PIPE_FUNC_ALWAYS: return SVGA3D_CMP_ALWAYS;
default:
assert(0);
return SVGA3D_CMP_ALWAYS;
}
}
static INLINE unsigned
svga_translate_stencil_op(unsigned op)
{
switch (op) {
case PIPE_STENCIL_OP_KEEP: return SVGA3D_STENCILOP_KEEP;
case PIPE_STENCIL_OP_ZERO: return SVGA3D_STENCILOP_ZERO;
case PIPE_STENCIL_OP_REPLACE: return SVGA3D_STENCILOP_REPLACE;
case PIPE_STENCIL_OP_INCR: return SVGA3D_STENCILOP_INCR;
case PIPE_STENCIL_OP_DECR: return SVGA3D_STENCILOP_DECR;
case PIPE_STENCIL_OP_INCR_WRAP: return SVGA3D_STENCILOP_INCRSAT; /* incorrect? */
case PIPE_STENCIL_OP_DECR_WRAP: return SVGA3D_STENCILOP_DECRSAT; /* incorrect? */
case PIPE_STENCIL_OP_INVERT: return SVGA3D_STENCILOP_INVERT;
default:
assert(0);
return SVGA3D_STENCILOP_KEEP;
}
}
static void *
svga_create_depth_stencil_state(struct pipe_context *pipe,
const struct pipe_depth_stencil_alpha_state *templ)
{
struct svga_depth_stencil_state *ds = CALLOC_STRUCT( svga_depth_stencil_state );
/* Don't try to figure out CW/CCW correspondence with
* stencil[0]/[1] at this point. Presumably this can change as
* back/front face are modified.
*/
ds->stencil[0].enabled = templ->stencil[0].enabled;
if (ds->stencil[0].enabled) {
ds->stencil[0].func = svga_translate_compare_func(templ->stencil[0].func);
ds->stencil[0].fail = svga_translate_stencil_op(templ->stencil[0].fail_op);
ds->stencil[0].zfail = svga_translate_stencil_op(templ->stencil[0].zfail_op);
ds->stencil[0].pass = svga_translate_stencil_op(templ->stencil[0].zpass_op);
/* SVGA3D has one ref/mask/writemask triple shared between front &
* back face stencil. We really need two:
*/
ds->stencil_mask = templ->stencil[0].valuemask & 0xff;
ds->stencil_writemask = templ->stencil[0].writemask & 0xff;
}
ds->stencil[1].enabled = templ->stencil[1].enabled;
if (templ->stencil[1].enabled) {
ds->stencil[1].func = svga_translate_compare_func(templ->stencil[1].func);
ds->stencil[1].fail = svga_translate_stencil_op(templ->stencil[1].fail_op);
ds->stencil[1].zfail = svga_translate_stencil_op(templ->stencil[1].zfail_op);
ds->stencil[1].pass = svga_translate_stencil_op(templ->stencil[1].zpass_op);
ds->stencil_mask = templ->stencil[1].valuemask & 0xff;
ds->stencil_writemask = templ->stencil[1].writemask & 0xff;
}
ds->zenable = templ->depth.enabled;
if (ds->zenable) {
ds->zfunc = svga_translate_compare_func(templ->depth.func);
ds->zwriteenable = templ->depth.writemask;
}
ds->alphatestenable = templ->alpha.enabled;
if (ds->alphatestenable) {
ds->alphafunc = svga_translate_compare_func(templ->alpha.func);
ds->alpharef = templ->alpha.ref_value;
}
return ds;
}
static void svga_bind_depth_stencil_state(struct pipe_context *pipe,
void *depth_stencil)
{
struct svga_context *svga = svga_context(pipe);
svga->curr.depth = (const struct svga_depth_stencil_state *)depth_stencil;
svga->dirty |= SVGA_NEW_DEPTH_STENCIL;
}
static void svga_delete_depth_stencil_state(struct pipe_context *pipe,
void *depth_stencil)
{
FREE(depth_stencil);
}
static void svga_set_stencil_ref( struct pipe_context *pipe,
const struct pipe_stencil_ref *stencil_ref )
{
struct svga_context *svga = svga_context(pipe);
svga->curr.stencil_ref = *stencil_ref;
svga->dirty |= SVGA_NEW_STENCIL_REF;
}
void svga_init_depth_stencil_functions( struct svga_context *svga )
{
svga->pipe.create_depth_stencil_alpha_state = svga_create_depth_stencil_state;
svga->pipe.bind_depth_stencil_alpha_state = svga_bind_depth_stencil_state;
svga->pipe.delete_depth_stencil_alpha_state = svga_delete_depth_stencil_state;
svga->pipe.set_stencil_ref = svga_set_stencil_ref;
}
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