#define FREEDRENO_LOWERING_H_
#include "pipe/p_shader_tokens.h"
+#include "tgsi/tgsi_scan.h"
-const struct tgsi_token * fd_transform_lowering(const struct tgsi_token *tokens);
+struct fd_lowering_config {
+ /* For fragment shaders, generate a shader that emulates two
+ * sided color by inserting a BGCOLOR input for each COLOR
+ * input, and insert a CMP instruction to select the correct
+ * color to use based on the TGSI_SEMANTIC_FACE input.
+ *
+ * Note that drivers which use this to emulate two sided color
+ * will:
+ * a) need to generate (on demand) alternate shaders to use
+ * depending on the rasterizer state (ie. whether two
+ * sided shading enabled)
+ * b) expect to see the BGCOLOR semantic name in fragment
+ * shaders. During linkage, the driver should simply
+ * map VS.OUT.BGCOLOR[n] to FS.IN.BGCOLOR[n] (in the
+ * same was as linking other outs/ins).
+ */
+ unsigned color_two_side : 1;
+
+ /* TODO support for alpha_to_one as well?? */
+
+ /* Individual OPC lowerings, if lower_<opc> is TRUE then
+ * enable lowering of TGSI_OPCODE_<opc>
+ */
+ unsigned lower_DST : 1;
+ unsigned lower_XPD : 1;
+ unsigned lower_SCS : 1;
+ unsigned lower_LRP : 1;
+ unsigned lower_FRC : 1;
+ unsigned lower_POW : 1;
+ unsigned lower_LIT : 1;
+ unsigned lower_EXP : 1;
+ unsigned lower_LOG : 1;
+ unsigned lower_DP4 : 1;
+ unsigned lower_DP3 : 1;
+ unsigned lower_DPH : 1;
+ unsigned lower_DP2 : 1;
+ unsigned lower_DP2A : 1;
+};
+
+const struct tgsi_token * fd_transform_lowering(
+ const struct fd_lowering_config *config,
+ const struct tgsi_token *tokens,
+ struct tgsi_shader_info *info);
#endif /* FREEDRENO_LOWERING_H_ */