From c6d74bcbfcb54e0c03f4c3d7e82bc1267f36ffe4 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 8 Dec 2010 18:21:18 -0700 Subject: mesa: add PROGRAM_SYSTEM_VALUE and related tokens System values are shader inputs which don't necessarily change from vertex to vertex or fragment to fragment. gl_InstanceID and gl_FrontFacing are examples. --- src/mesa/main/mtypes.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'src/mesa/main/mtypes.h') diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index 80c20e09d9..417f8df8e3 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -1747,11 +1747,24 @@ typedef enum PROGRAM_WRITE_ONLY, /**< A dummy, write-only register */ PROGRAM_ADDRESS, /**< machine->AddressReg */ PROGRAM_SAMPLER, /**< for shader samplers, compile-time only */ + PROGRAM_SYSTEM_VALUE,/**< InstanceId, PrimitiveID, etc. */ PROGRAM_UNDEFINED, /**< Invalid/TBD value */ PROGRAM_FILE_MAX } gl_register_file; +/** + * If the register file is PROGRAM_SYSTEM_VALUE, the register index will be + * one of these values. + */ +typedef enum +{ + SYSTEM_VALUE_FRONT_FACE, /**< Fragment shader only (not done yet) */ + SYSTEM_VALUE_INSTANCE_ID, /**< Vertex shader only */ + SYSTEM_VALUE_MAX /**< Number of values */ +} gl_system_value; + + /** Vertex and fragment instructions */ struct prog_instruction; struct gl_program_parameter_list; @@ -1774,6 +1787,7 @@ struct gl_program GLbitfield InputsRead; /**< Bitmask of which input regs are read */ GLbitfield64 OutputsWritten; /**< Bitmask of which output regs are written */ + GLbitfield SystemValuesRead; /**< Bitmask of SYSTEM_VALUE_x inputs used */ GLbitfield InputFlags[MAX_PROGRAM_INPUTS]; /**< PROG_PARAM_BIT_x flags */ GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */ GLbitfield TexturesUsed[MAX_TEXTURE_UNITS]; /**< TEXTURE_x_BIT bitmask */ -- cgit v1.2.3