UI: panel tabs, use simple color interpolation that ignores alpha

1 files changed, 27 insertions, 0 deletions

diff --git a/source/blender/blenlib/intern/math_vector.c b/source/blender/blenlib/intern/math_vector.c
index 367166578ae..54615a5264d 100644
--- a/source/blender/blenlib/intern/math_vector.c
+++ b/source/blender/blenlib/intern/math_vector.c
@@ -109,6 +109,33 @@ void interp_v3_v3v3v3_uv(float p[3], const float v1[3], const float v2[3], const
 	p[2] = v1[2] + ((v2[2] - v1[2]) * uv[0]) + ((v3[2] - v1[2]) * uv[1]);
 }
 
+void interp_v3_v3v3_uchar(char unsigned target[3], const unsigned char a[3], const unsigned char b[3], const float t)
+{
+	float s = 1.0f - t;
+
+	target[0] = (char)floorf(s * a[0] + t * b[0]);
+	target[1] = (char)floorf(s * a[1] + t * b[1]);
+	target[2] = (char)floorf(s * a[2] + t * b[2]);
+}
+void interp_v3_v3v3_char(char target[3], const char a[3], const char b[3], const float t)
+{
+	interp_v3_v3v3_char((char *)target, (const char *)a, (const char *)b, t);
+}
+
+void interp_v4_v4v4_uchar(char unsigned target[4], const unsigned char a[4], const unsigned char b[4], const float t)
+{
+	float s = 1.0f - t;
+
+	target[0] = (char)floorf(s * a[0] + t * b[0]);
+	target[1] = (char)floorf(s * a[1] + t * b[1]);
+	target[2] = (char)floorf(s * a[2] + t * b[2]);
+	target[3] = (char)floorf(s * a[3] + t * b[3]);
+}
+void interp_v4_v4v4_char(char target[4], const char a[4], const char b[4], const float t)
+{
+	interp_v4_v4v4_char((char *)target, (const char *)a, (const char *)b, t);
+}
+
 void mid_v3_v3v3(float v[3], const float v1[3], const float v2[3])
 {
 	v[0] = 0.5f * (v1[0] + v2[0]);