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gallivm: checkpoint WIP cubemap code

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This commit is contained in:
Brian Paul
2010-03-11 16:26:52 -07:00
parent 0b3bb6318e
commit e574b79485
1 changed files with 90 additions and 1 deletions
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src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
+90 -1
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@@ -48,6 +48,7 @@
#include "lp_bld_logic.h"
#include "lp_bld_swizzle.h"
#include "lp_bld_pack.h"
#include "lp_bld_flow.h"
#include "lp_bld_format.h"
#include "lp_bld_sample.h"
@@ -1200,6 +1201,93 @@ lp_build_sample_image_linear(struct lp_build_sample_context *bld,
}
/**
* Generate code to do cube face selection and per-face texcoords.
*/
static void
lp_build_cube_lookup(struct lp_build_sample_context *bld,
LLVMValueRef s,
LLVMValueRef t,
LLVMValueRef r,
LLVMValueRef *face,
LLVMValueRef *face_s,
LLVMValueRef *face_t)
{
#if 0
struct lp_build_context *float_bld = &bld->float_bld;
LLVMValueRef rx, ry, rz;
LLVMValueRef arx, ary, arz;
LLVMValueRef sc, tc, ma;
LLVMValueRef c25 = LLVMConstReal(LLVMFloatType(), 0.25);
LLVMValueRef arx_ge_ary, arx_ge_arz;
LLVMValueRef ary_ge_arx, ary_ge_arz;
LLVMValueRef arx_ge_ary_arz, ary_ge_arx_arz;
LLVMValueRef rx_pos, ry_pos, rz_pos;
assert(bld->coord_bld.type.length == 4);
/*
* Use the average of the four pixel's texcoords to choose the face.
*/
rx = lp_build_mul(float_bld, c25,
lp_build_sum_vector(&bld->coord_bld, s));
ry = lp_build_mul(float_bld, c25,
lp_build_sum_vector(&bld->coord_bld, t));
rz = lp_build_mul(float_bld, c25,
lp_build_sum_vector(&bld->coord_bld, r));
arx = lp_build_abs(float_bld, rx);
ary = lp_build_abs(float_bld, ry);
arz = lp_build_abs(float_bld, rz);
/*
* Compare sign/magnitude of rx,ry,rz to determine face
*/
arx_ge_ary = LLVMBuildFCmp(bld->builder, LLVMRealUGE, arx, ary, "");
arx_ge_arz = LLVMBuildFCmp(bld->builder, LLVMRealUGE, arx, arz, "");
ary_ge_arx = LLVMBuildFCmp(bld->builder, LLVMRealUGE, ary, arx, "");
ary_ge_arz = LLVMBuildFCmp(bld->builder, LLVMRealUGE, ary, arz, "");
arx_ge_ary_arz = LLVMBuildAnd(bld->builder, arx_ge_ary, arx_ge_arz, "");
ary_ge_arx_arz = LLVMBuildAnd(bld->builder, ary_ge_arx, ary_ge_arz, "");
rx_pos = LLVMBuildFCmp(bld->builder, LLVMRealUGE, rx, float_bld->zero, "");
ry_pos = LLVMBuildFCmp(bld->builder, LLVMRealUGE, ry, float_bld->zero, "");
rz_pos = LLVMBuildFCmp(bld->builder, LLVMRealUGE, rz, float_bld->zero, "");
{
struct lp_build_flow_context *flow_ctx;
struct lp_build_if_state if_ctx, if2_ctx;
flow_ctx = lp_build_flow_create(bld->builder);
lp_build_if(&if_ctx, flow_ctx, bld->builder, arx_ge_ary_arz);
{
#if 0
lp_build_if(&if2_ctx, flow_ctx, bld->builder, rx_pos);
{
/* Positive X face */
}
lp_build_else(&if2_ctx);
{
/* Negative X face */
}
lp_build_endif(&if2_ctx);
#endif
}
lp_build_else(&if_ctx);
{
}
lp_build_endif(&if_ctx);
lp_build_flow_destroy(flow_ctx);
}
#endif
}
/**
* General texture sampling codegen.
@@ -1303,7 +1391,8 @@ lp_build_sample_general(struct lp_build_sample_context *bld,
* Choose cube face, recompute texcoords.
*/
if (bld->static_state->target == PIPE_TEXTURE_CUBE) {
LLVMValueRef face, face_s, face_t;
lp_build_cube_lookup(bld, s, t, r, &face, &face_s, &face_t);
}
/*