diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_interp.c')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_interp.c | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_interp.c b/src/gallium/drivers/llvmpipe/lp_bld_interp.c index 2a374f8c39..c9da8900d0 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_interp.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_interp.c @@ -206,7 +206,7 @@ coeffs_init(struct lp_build_interp_soa_context *bld, dadq2 = LLVMBuildFAdd(builder, dadq, dadq, ""); /* - * a = a0 + x * dadx + y * dady + * a = a0 + (x * dadx + y * dady) */ if (attrib == 0 && chan == 0) { @@ -219,11 +219,11 @@ coeffs_init(struct lp_build_interp_soa_context *bld, a = a0; if (interp != LP_INTERP_CONSTANT && interp != LP_INTERP_FACING) { - LLVMValueRef tmp; - tmp = LLVMBuildFMul(builder, bld->x, dadx, ""); - a = LLVMBuildFAdd(builder, a, tmp, ""); - tmp = LLVMBuildFMul(builder, bld->y, dady, ""); - a = LLVMBuildFAdd(builder, a, tmp, ""); + LLVMValueRef ax, ay, axy; + ax = LLVMBuildFMul(builder, bld->x, dadx, ""); + ay = LLVMBuildFMul(builder, bld->y, dady, ""); + axy = LLVMBuildFAdd(builder, ax, ay, ""); + a = LLVMBuildFAdd(builder, a, axy, ""); } } @@ -272,7 +272,10 @@ coeffs_init(struct lp_build_interp_soa_context *bld, * This is called when we move from one quad to the next. */ static void -attribs_update(struct lp_build_interp_soa_context *bld, int quad_index) +attribs_update(struct lp_build_interp_soa_context *bld, + int quad_index, + int start, + int end) { struct lp_build_context *coeff_bld = &bld->coeff_bld; LLVMValueRef shuffle = lp_build_const_int_vec(coeff_bld->type, quad_index); @@ -282,7 +285,7 @@ attribs_update(struct lp_build_interp_soa_context *bld, int quad_index) assert(quad_index < 4); - for(attrib = 0; attrib < bld->num_attribs; ++attrib) { + for(attrib = start; attrib < end; ++attrib) { const unsigned mask = bld->mask[attrib]; const unsigned interp = bld->interp[attrib]; for(chan = 0; chan < NUM_CHANNELS; ++chan) { @@ -350,6 +353,14 @@ attribs_update(struct lp_build_interp_soa_context *bld, int quad_index) } #endif + if (attrib == 0 && chan == 2) { + /* FIXME: Depth values can exceed 1.0, due to the fact that + * setup interpolation coefficients refer to (0,0) which causes + * precision loss. So we must clamp to 1.0 here to avoid artifacts + */ + a = lp_build_min(coeff_bld, a, coeff_bld->one); + } + attrib_name(a, attrib, chan, ""); } bld->attribs[attrib][chan] = a; @@ -434,8 +445,6 @@ lp_build_interp_soa_init(struct lp_build_interp_soa_context *bld, pos_init(bld, x0, y0); coeffs_init(bld, a0_ptr, dadx_ptr, dady_ptr); - - attribs_update(bld, 0); } @@ -443,10 +452,20 @@ lp_build_interp_soa_init(struct lp_build_interp_soa_context *bld, * Advance the position and inputs to the given quad within the block. */ void -lp_build_interp_soa_update(struct lp_build_interp_soa_context *bld, - int quad_index) +lp_build_interp_soa_update_inputs(struct lp_build_interp_soa_context *bld, + int quad_index) +{ + assert(quad_index < 4); + + attribs_update(bld, quad_index, 1, bld->num_attribs); +} + +void +lp_build_interp_soa_update_pos(struct lp_build_interp_soa_context *bld, + int quad_index) { assert(quad_index < 4); - attribs_update(bld, quad_index); + attribs_update(bld, quad_index, 0, 1); } + |