[Mesa-dev] [PATCH 1/3] mesa/get: Make GetFloat/GetDouble of TYPE_INT_N not normalize things.

[Kenneth Graunke]

GetFloat of integer valued things is supposed to perform a simple
int -> float conversion.  INT_TO_FLOAT is not that.  Instead, it
converts [-2147483648, 2147483647] to a normalized [-1.0, 1.0] float.

This is only used for COMPRESSED_TEXTURE_FORMATS, which nobody in
their right mind would try and access via glGetFloat(), but we may
as well fix it.

Found by inspection.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/main/get.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index ba02cb2..25444e7 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1564,7 +1564,7 @@ _mesa_GetFloatv(GLenum pname, GLfloat *params)
 
    case TYPE_INT_N:
       for (i = 0; i < v.value_int_n.n; i++)
-	 params[i] = INT_TO_FLOAT(v.value_int_n.ints[i]);
+	 params[i] = (GLfloat) v.value_int_n.ints[i];
       break;
 
    case TYPE_INT64:
@@ -2536,7 +2536,7 @@ _mesa_GetDoublei_v(GLenum pname, GLuint index, GLdouble *params)
 
    case TYPE_INT_N:
       for (i = 0; i < v.value_int_n.n; i++)
-	 params[i] = (GLdouble) INT_TO_FLOAT(v.value_int_n.ints[i]);
+	 params[i] = (GLdouble) v.value_int_n.ints[i];
       break;
 
    case TYPE_INT64:
-- 
2.10.2