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gallium: switch dedicated centroid field to interpolation location

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The new location field can be either center, centroid, or sample, which
indicates the location that the shader should interpolate at.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
Ilia Mirkin
2014-07-01 20:54:01 -04:00
parent e3b16294cb
commit 4c97ed4411
17 changed files with 57 additions and 31 deletions
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9
src/gallium/include/pipe/p_shader_tokens.h
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@@ -103,6 +103,11 @@ enum tgsi_file_type {
#define TGSI_INTERPOLATE_COLOR 3 /* special color case for smooth/flat */
#define TGSI_INTERPOLATE_COUNT 4
#define TGSI_INTERPOLATE_LOC_CENTER 0
#define TGSI_INTERPOLATE_LOC_CENTROID 1
#define TGSI_INTERPOLATE_LOC_SAMPLE 2
#define TGSI_INTERPOLATE_LOC_COUNT 3
#define TGSI_CYLINDRICAL_WRAP_X (1 << 0)
#define TGSI_CYLINDRICAL_WRAP_Y (1 << 1)
#define TGSI_CYLINDRICAL_WRAP_Z (1 << 2)
@@ -138,9 +143,9 @@ struct tgsi_declaration_dimension
struct tgsi_declaration_interp
{
unsigned Interpolate : 4; /**< one of TGSI_INTERPOLATE_x */
unsigned Centroid : 1; /**< centroid sampling? */
unsigned Location : 2; /**< one of TGSI_INTERPOLATE_LOC_x */
unsigned CylindricalWrap:4; /**< TGSI_CYLINDRICAL_WRAP_x flags */
unsigned Padding : 23;
unsigned Padding : 22;
};
#define TGSI_SEMANTIC_POSITION 0