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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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13
src/mesa/state_tracker/st_program.c
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@@ -351,7 +351,7 @@ st_translate_vertex_program(struct st_context *st,
NULL, /* input semantic name */
NULL, /* input semantic index */
NULL, /* interp mode */
NULL, /* is centroid */
NULL, /* interp location */
/* outputs */
num_outputs,
stvp->result_to_output,
@@ -481,6 +481,7 @@ st_translate_fragment_program(struct st_context *st,
GLuint outputMapping[FRAG_RESULT_MAX];
GLuint inputMapping[VARYING_SLOT_MAX];
GLuint interpMode[PIPE_MAX_SHADER_INPUTS]; /* XXX size? */
GLuint interpLocation[PIPE_MAX_SHADER_INPUTS];
GLuint attr;
GLbitfield64 inputsRead;
struct ureg_program *ureg;
@@ -489,7 +490,6 @@ st_translate_fragment_program(struct st_context *st,
ubyte input_semantic_name[PIPE_MAX_SHADER_INPUTS];
ubyte input_semantic_index[PIPE_MAX_SHADER_INPUTS];
GLboolean is_centroid[PIPE_MAX_SHADER_INPUTS];
uint fs_num_inputs = 0;
ubyte fs_output_semantic_name[PIPE_MAX_SHADER_OUTPUTS];
@@ -541,7 +541,12 @@ st_translate_fragment_program(struct st_context *st,
const GLuint slot = fs_num_inputs++;
inputMapping[attr] = slot;
is_centroid[slot] = (stfp->Base.IsCentroid & BITFIELD64_BIT(attr)) != 0;
if (stfp->Base.IsCentroid & BITFIELD64_BIT(attr))
interpLocation[slot] = TGSI_INTERPOLATE_LOC_CENTROID;
else if (stfp->Base.IsSample & BITFIELD64_BIT(attr))
interpLocation[slot] = TGSI_INTERPOLATE_LOC_SAMPLE;
else
interpLocation[slot] = TGSI_INTERPOLATE_LOC_CENTER;
switch (attr) {
case VARYING_SLOT_POS:
@@ -768,7 +773,7 @@ st_translate_fragment_program(struct st_context *st,
input_semantic_name,
input_semantic_index,
interpMode,
is_centroid,
interpLocation,
/* outputs */
fs_num_outputs,
outputMapping,