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#include "util/u_math.h"
#include "util/u_memory.h"
#include "brw_context.h"
#include "brw_defines.h"
/* XXX: Fixme - include this to get IZ_ defines
*/
#include "brw_wm.h"
static unsigned brw_translate_compare_func(unsigned func)
{
switch (func) {
case PIPE_FUNC_NEVER:
return BRW_COMPAREFUNCTION_NEVER;
case PIPE_FUNC_LESS:
return BRW_COMPAREFUNCTION_LESS;
case PIPE_FUNC_LEQUAL:
return BRW_COMPAREFUNCTION_LEQUAL;
case PIPE_FUNC_GREATER:
return BRW_COMPAREFUNCTION_GREATER;
case PIPE_FUNC_GEQUAL:
return BRW_COMPAREFUNCTION_GEQUAL;
case PIPE_FUNC_NOTEQUAL:
return BRW_COMPAREFUNCTION_NOTEQUAL;
case PIPE_FUNC_EQUAL:
return BRW_COMPAREFUNCTION_EQUAL;
case PIPE_FUNC_ALWAYS:
return BRW_COMPAREFUNCTION_ALWAYS;
default:
assert(0);
return BRW_COMPAREFUNCTION_ALWAYS;
}
}
static unsigned translate_stencil_op(unsigned op)
{
switch (op) {
case PIPE_STENCIL_OP_KEEP:
return BRW_STENCILOP_KEEP;
case PIPE_STENCIL_OP_ZERO:
return BRW_STENCILOP_ZERO;
case PIPE_STENCIL_OP_REPLACE:
return BRW_STENCILOP_REPLACE;
case PIPE_STENCIL_OP_INCR:
return BRW_STENCILOP_INCRSAT;
case PIPE_STENCIL_OP_DECR:
return BRW_STENCILOP_DECRSAT;
case PIPE_STENCIL_OP_INCR_WRAP:
return BRW_STENCILOP_INCR;
case PIPE_STENCIL_OP_DECR_WRAP:
return BRW_STENCILOP_DECR;
case PIPE_STENCIL_OP_INVERT:
return BRW_STENCILOP_INVERT;
default:
assert(0);
return BRW_STENCILOP_ZERO;
}
}
static void create_bcc_state( struct brw_depth_stencil_state *zstencil,
const struct pipe_depth_stencil_alpha_state *templ )
{
if (templ->stencil[0].enabled) {
zstencil->cc0.stencil_enable = 1;
zstencil->cc0.stencil_func =
brw_translate_compare_func(templ->stencil[0].func);
zstencil->cc0.stencil_fail_op =
translate_stencil_op(templ->stencil[0].fail_op);
zstencil->cc0.stencil_pass_depth_fail_op =
translate_stencil_op(templ->stencil[0].zfail_op);
zstencil->cc0.stencil_pass_depth_pass_op =
translate_stencil_op(templ->stencil[0].zpass_op);
zstencil->cc1.stencil_ref = templ->stencil[0].ref_value;
zstencil->cc1.stencil_write_mask = templ->stencil[0].writemask;
zstencil->cc1.stencil_test_mask = templ->stencil[0].valuemask;
if (templ->stencil[1].enabled) {
zstencil->cc0.bf_stencil_enable = 1;
zstencil->cc0.bf_stencil_func =
brw_translate_compare_func(templ->stencil[1].func);
zstencil->cc0.bf_stencil_fail_op =
translate_stencil_op(templ->stencil[1].fail_op);
zstencil->cc0.bf_stencil_pass_depth_fail_op =
translate_stencil_op(templ->stencil[1].zfail_op);
zstencil->cc0.bf_stencil_pass_depth_pass_op =
translate_stencil_op(templ->stencil[1].zpass_op);
zstencil->cc1.bf_stencil_ref = templ->stencil[1].ref_value;
zstencil->cc2.bf_stencil_write_mask = templ->stencil[1].writemask;
zstencil->cc2.bf_stencil_test_mask = templ->stencil[1].valuemask;
}
zstencil->cc0.stencil_write_enable = (zstencil->cc1.stencil_write_mask ||
zstencil->cc2.bf_stencil_write_mask);
}
if (templ->alpha.enabled) {
zstencil->cc3.alpha_test = 1;
zstencil->cc3.alpha_test_func = brw_translate_compare_func(templ->alpha.func);
zstencil->cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
zstencil->cc7.alpha_ref.ub[0] = float_to_ubyte(templ->alpha.ref_value);
}
if (templ->depth.enabled) {
zstencil->cc2.depth_test = 1;
zstencil->cc2.depth_test_function = brw_translate_compare_func(templ->depth.func);
zstencil->cc2.depth_write_enable = templ->depth.writemask;
}
}
static void create_wm_iz_state( struct brw_depth_stencil_state *zstencil )
{
if (zstencil->cc3.alpha_test)
zstencil->iz_lookup |= IZ_PS_KILL_ALPHATEST_BIT;
if (zstencil->cc2.depth_test)
zstencil->iz_lookup |= IZ_DEPTH_TEST_ENABLE_BIT;
if (zstencil->cc2.depth_write_enable)
zstencil->iz_lookup |= IZ_DEPTH_WRITE_ENABLE_BIT;
if (zstencil->cc0.stencil_enable)
zstencil->iz_lookup |= IZ_STENCIL_TEST_ENABLE_BIT;
if (zstencil->cc0.stencil_write_enable)
zstencil->iz_lookup |= IZ_STENCIL_WRITE_ENABLE_BIT;
}
static void *
brw_create_depth_stencil_state( struct pipe_context *pipe,
const struct pipe_depth_stencil_alpha_state *templ )
{
struct brw_depth_stencil_state *zstencil = CALLOC_STRUCT(brw_depth_stencil_state);
create_bcc_state( zstencil, templ );
create_wm_iz_state( zstencil );
return (void *)zstencil;
}
static void brw_bind_depth_stencil_state(struct pipe_context *pipe,
void *cso)
{
struct brw_context *brw = brw_context(pipe);
brw->curr.zstencil = (const struct brw_depth_stencil_state *)cso;
brw->state.dirty.mesa |= PIPE_NEW_DEPTH_STENCIL_ALPHA;
}
static void brw_delete_depth_stencil_state(struct pipe_context *pipe,
void *cso)
{
struct brw_context *brw = brw_context(pipe);
assert((const void *)cso != (const void *)brw->curr.zstencil);
FREE(cso);
}
void brw_pipe_depth_stencil_init( struct brw_context *brw )
{
brw->base.create_depth_stencil_alpha_state = brw_create_depth_stencil_state;
brw->base.bind_depth_stencil_alpha_state = brw_bind_depth_stencil_state;
brw->base.delete_depth_stencil_alpha_state = brw_delete_depth_stencil_state;
}
void brw_pipe_depth_stencil_cleanup( struct brw_context *brw )
{
}
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