i965: fix double-precision vertex inputs measurement

For double-precision vertex inputs we need to measure them in dvec4
terms, and for single-precision vertex inputs we need to measure them in
vec4 terms.

For the later case, we use type_size_vec4() function. For the former
case, we had a wrong implementation based on type_size_vec4().

This commit introduces a proper type_size_dvec4() function, that we use
to measure vertex inputs.

Measuring double-precision vertex inputs as dvec4 is required because
ARB_vertex_attrib_64bit states that these uses the same number of
locations than the single-precision version. That is, two consecutives
dvec4 would be located in location "x" and location "x+1", not "x+2".

Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 847a6d36566..bb2caa54e17 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -552,7 +552,7 @@ extern "C" int
 type_size_vs_input(const struct glsl_type *type)
 {
    if (type->is_double()) {
-      return type_size_vec4(type) / 2;
+      return type_size_dvec4(type);
    } else {
       return type_size_vec4(type);
    }