diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2006-05-30 22:17:35 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2006-05-30 22:17:35 +0000 |
| commit | a8c4242395b1bce0eac2a20243e5289414a9f511 (patch) | |
| tree | 7ff0d74522c04fb170ad0ce472c1fe3562de4498 /src/mesa/shader/program_instruction.h | |
| parent | e4cb9cd167b2993a4d73871b80216af9766f130b (diff) | |
Define new NEGATE_* tokens for setting the src register's NegateBase field.
Before, we were using GL_TRUE/GL_FALSE in a few places.
Note: only the SWZ instruction can negate individual components.
Diffstat (limited to 'src/mesa/shader/program_instruction.h')
| -rw-r--r-- | src/mesa/shader/program_instruction.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/src/mesa/shader/program_instruction.h b/src/mesa/shader/program_instruction.h index 20886d9f02..93bcfc240a 100644 --- a/src/mesa/shader/program_instruction.h +++ b/src/mesa/shader/program_instruction.h @@ -75,6 +75,19 @@ /** + * Per-component negation masks + */ +/*@{*/ +#define NEGATE_X 0x1 +#define NEGATE_Y 0x2 +#define NEGATE_Z 0x4 +#define NEGATE_W 0x8 +#define NEGATE_XYZW 0xf +#define NEGATE_NONE 0x0 +/*@}*/ + + +/** * Program instruction opcodes, for both vertex and fragment programs. * \note changes to this opcode list must be reflected in t_vb_arbprogram.c */ @@ -173,7 +186,8 @@ struct prog_src_register */ /*@{*/ /** - * Per-component negation for the SWZ instruction. + * Per-component negation for the SWZ instruction. For non-SWZ + * instructions the only possible values are NEGATE_XYZW and NEGATE_NONE. * * \since * ARB_vertex_program, ARB_fragment_program @@ -190,8 +204,7 @@ struct prog_src_register GLuint Abs:1; /** - * Take the component-wise negation. The negation occurs \b after the - * (optional) absolute value operation. + * Post-absolute value negation (all components). */ GLuint NegateAbs:1; /*@}*/ |