diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c')
-rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c | 91 |
1 files changed, 90 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c index 50b61dc224..a410688350 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c @@ -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); } /* |