#define LP_BLD_INTERP_H
-#include <llvm-c/Core.h>
+#include "gallivm/lp_bld.h"
+#include "gallivm/lp_bld_type.h"
#include "tgsi/tgsi_exec.h"
-#include "lp_bld_type.h"
-
+/**
+ * Describes how to compute the interpolation coefficients (a0, dadx, dady)
+ * from the vertices passed into our triangle/line/point functions by the
+ * draw module.
+ *
+ * Vertices are treated as an array of float[4] values, indexed by
+ * src_index.
+ *
+ * LP_INTERP_COLOR is translated to either LP_INTERP_CONSTANT or
+ * LINEAR depending on flatshade state.
+ */
+enum lp_interp {
+ LP_INTERP_CONSTANT,
+ LP_INTERP_COLOR,
+ LP_INTERP_LINEAR,
+ LP_INTERP_PERSPECTIVE,
+ LP_INTERP_POSITION,
+ LP_INTERP_FACING
+};
-struct tgsi_token;
+struct lp_shader_input {
+ ushort interp:4; /* enum lp_interp */
+ ushort usage_mask:4; /* bitmask of TGSI_WRITEMASK_x flags */
+ ushort src_index:8; /* where to find values in incoming vertices */
+};
struct lp_build_interp_soa_context
{
- struct lp_build_context base;
+ /* QUAD_SIZE x float */
+ struct lp_build_context coeff_bld;
unsigned num_attribs;
- unsigned mask[1 + PIPE_MAX_SHADER_INPUTS];
- unsigned mode[1 + PIPE_MAX_SHADER_INPUTS];
+ unsigned mask[1 + PIPE_MAX_SHADER_INPUTS]; /**< TGSI_WRITE_MASK_x */
+ enum lp_interp interp[1 + PIPE_MAX_SHADER_INPUTS];
+
+ LLVMValueRef x;
+ LLVMValueRef y;
- LLVMValueRef a0 [1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
- LLVMValueRef dadx[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
- LLVMValueRef dady[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
+ LLVMValueRef a [1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
+ LLVMValueRef dadq[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
- /* Attribute values before perspective divide */
- LLVMValueRef attribs_pre[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
+ LLVMValueRef oow;
LLVMValueRef attribs[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
void
lp_build_interp_soa_init(struct lp_build_interp_soa_context *bld,
- const struct tgsi_token *tokens,
- boolean flatshade,
+ struct gallivm_state *gallivm,
+ unsigned num_inputs,
+ const struct lp_shader_input *inputs,
LLVMBuilderRef builder,
struct lp_type type,
LLVMValueRef a0_ptr,
LLVMValueRef dadx_ptr,
LLVMValueRef dady_ptr,
- LLVMValueRef x0,
- LLVMValueRef y0);
+ LLVMValueRef x,
+ LLVMValueRef y);
+
+void
+lp_build_interp_soa_update_inputs(struct lp_build_interp_soa_context *bld,
+ struct gallivm_state *gallivm,
+ int quad_index);
void
-lp_build_interp_soa_update(struct lp_build_interp_soa_context *bld,
- int quad_index);
+lp_build_interp_soa_update_pos(struct lp_build_interp_soa_context *bld,
+ struct gallivm_state *gallivm,
+ int quad_index);
#endif /* LP_BLD_INTERP_H */