summaryrefslogtreecommitdiffstats
path: root/src/gallium/auxiliary
diff options
context:
space:
mode:
authorBrian Paul <[email protected]>2010-03-18 13:02:53 -0600
committerBrian Paul <[email protected]>2010-03-18 13:06:32 -0600
commit22e6dc387039e79f6d1435ae8b7422a6514d5d10 (patch)
tree15a8e1c26690f70b6d8486ebdc83fc6312a04619 /src/gallium/auxiliary
parentd219b8a022a6fdaa0106c6e160b594c359f85185 (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.c22
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_depth.h3
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 */