diff options
author | Brian Paul <[email protected]> | 2010-03-18 13:02:53 -0600 |
---|---|---|
committer | Brian Paul <[email protected]> | 2010-03-18 13:06:32 -0600 |
commit | 22e6dc387039e79f6d1435ae8b7422a6514d5d10 (patch) | |
tree | 15a8e1c26690f70b6d8486ebdc83fc6312a04619 /src/gallium/auxiliary | |
parent | d219b8a022a6fdaa0106c6e160b594c359f85185 (diff) |
gallivm/llvmpipe: added lp_rast_shader_inputs::facing and pass through
The triangle rasterizer sets this field to indicate front/back-facing.
It gets passed into the generated fragment code as another parameter.
Used now for stencil front/back selection but will also be used for
fragment shaders in general (see TGSI_SEMANTIC_FACE).
With this commit two-sided stenciling mostly works but there's
still a bug or two...
Diffstat (limited to 'src/gallium/auxiliary')
-rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_depth.c | 22 | ||||
-rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_depth.h | 3 |
2 files changed, 15 insertions, 10 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_depth.c b/src/gallium/auxiliary/gallivm/lp_bld_depth.c index c253764e603..e1558dca0e7 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_depth.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_depth.c @@ -143,7 +143,7 @@ lp_build_stencil_test(struct lp_build_context *bld, struct lp_build_if_state if_ctx; LLVMValueRef front_facing; LLVMValueRef zero = LLVMConstReal(LLVMFloatType(), 0.0); - LLVMValueRef result = NULL; + LLVMValueRef result = bld->undef; flow_ctx = lp_build_flow_create(bld->builder); lp_build_flow_scope_begin(flow_ctx); @@ -151,7 +151,7 @@ lp_build_stencil_test(struct lp_build_context *bld, lp_build_flow_scope_declare(flow_ctx, &result); /* front_facing = face > 0.0 */ - front_facing = lp_build_cmp(bld, PIPE_FUNC_GREATER, face, zero); + front_facing = LLVMBuildFCmp(bld->builder, LLVMRealUGT, face, zero, ""); lp_build_if(&if_ctx, flow_ctx, bld->builder, front_facing); { @@ -287,7 +287,7 @@ lp_build_stencil_op(struct lp_build_context *bld, struct lp_build_if_state if_ctx; LLVMValueRef front_facing; LLVMValueRef zero = LLVMConstReal(LLVMFloatType(), 0.0); - LLVMValueRef result = NULL; + LLVMValueRef result = bld->undef; flow_ctx = lp_build_flow_create(bld->builder); lp_build_flow_scope_begin(flow_ctx); @@ -295,7 +295,7 @@ lp_build_stencil_op(struct lp_build_context *bld, lp_build_flow_scope_declare(flow_ctx, &result); /* front_facing = face > 0.0 */ - front_facing = lp_build_cmp(bld, PIPE_FUNC_GREATER, face, zero); + front_facing = LLVMBuildFCmp(bld->builder, LLVMRealUGT, face, zero, ""); lp_build_if(&if_ctx, flow_ctx, bld->builder, front_facing); { @@ -367,11 +367,15 @@ lp_depth_type(const struct util_format_description *format_desc, * Generate code for performing depth and/or stencil tests. * We operate on a vector of values (typically a 2x2 quad). * + * \param depth the depth test state + * \param stencil the front/back stencil state * \param type the data type of the fragment depth/stencil values * \param format_desc description of the depth/stencil surface - * \param mask the alive/dead pixel mask for the quad - * \param src the incoming depth/stencil values (a 2x2 quad) - * \param dst_ptr the outgoing/updated depth/stencil values + * \param mask the alive/dead pixel mask for the quad (vector) + * \param stencil_refs the front/back stencil ref values (scalar) + * \param z_src the incoming depth/stencil values (a 2x2 quad) + * \param zs_dst_ptr pointer to depth/stencil values in framebuffer + * \param facing contains float value indicating front/back facing polygon */ void lp_build_depth_stencil_test(LLVMBuilderRef builder, @@ -382,7 +386,8 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, struct lp_build_mask_context *mask, LLVMValueRef stencil_refs[2], LLVMValueRef z_src, - LLVMValueRef zs_dst_ptr) + LLVMValueRef zs_dst_ptr, + LLVMValueRef face) { struct lp_build_context bld; unsigned z_swizzle, s_swizzle; @@ -391,7 +396,6 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, LLVMValueRef z_bitmask = NULL, s_bitmask = NULL; LLVMValueRef z_pass = NULL, s_pass_mask = NULL; LLVMValueRef orig_mask = mask->value; - LLVMValueRef face = NULL; assert(depth->enabled || stencil[0].enabled); diff --git a/src/gallium/auxiliary/gallivm/lp_bld_depth.h b/src/gallium/auxiliary/gallivm/lp_bld_depth.h index 5708ced9839..27dd46b625d 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_depth.h +++ b/src/gallium/auxiliary/gallivm/lp_bld_depth.h @@ -59,7 +59,8 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, struct lp_build_mask_context *mask, LLVMValueRef stencil_refs[2], LLVMValueRef zs_src, - LLVMValueRef zs_dst_ptr); + LLVMValueRef zs_dst_ptr, + LLVMValueRef facing); #endif /* !LP_BLD_DEPTH_H */ |