tests,util: Wrap glutPostRedisplay with piglit_post_redisplay

I'm trying to transition Piglit from using GLUT to using Waffle. This
requires killing all uses of GLUT functions, one-by-one.

This patch replaces all-but-one instance of glutPostRedisplay with a new
wrapper, piglit_post_redisplay. The sole remaining test that uses
glutPostRedisplay is windowoverlap; but that test doesn't use
piglit-framework, anyway.

Since piglit_escape_exit_key() calls piglit_post_redisplay() which is
defined in piglitutil_gl*, we must now link piglitutil_gl
into piglitglxutil to prevent link errors.
Acked-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-and-tested-by: Jordan Justen <jordan.l.justen@intel.com>
Tested-by: Paul Berry <stereotype441@gmail.com>
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>

tests/general/texgen.c

@@ -204,7 +204,7 @@ static void Key(unsigned char key, int x, int y)
 		exit(0);
 		break;
 	}
-	glutPostRedisplay();
+	piglit_post_redisplay();
 }
 
 void piglit_init(int argc, char *argv[])

tests/texturing/lodbias.c

@@ -289,7 +289,7 @@ static void Key(unsigned char key, int x, int y)
 		break;
 	}
 	printf("Current LOD bias: 1st tex: %i  2nd tex: %i\n", CurrentBias, CurrentBias2);
-	glutPostRedisplay();
+	piglit_post_redisplay();
 }
 
 void

tests/texturing/texdepth.c

@@ -365,7 +365,7 @@ static void Key(unsigned char key, int x, int y)
 		exit(0);
 		break;
 	}
-	glutPostRedisplay();
+	piglit_post_redisplay();
 }
 
 void

tests/util/CMakeLists.gl.txt

@@ -37,6 +37,9 @@ IF(BUILD_GLX_TESTS)
 		    piglit-dispatch.c
 		    piglit-dispatch-init.c
 	)
+	target_link_libraries(piglitglxutil
+		piglitutil_${piglit_target_api}
+		)
 	set (UTIL_GL_SOURCES
 		${UTIL_GL_SOURCES}
 		piglit-glx-util.c

tests/util/piglit-framework.c

@@ -140,3 +140,10 @@ piglit_gl_test_run(int argc, char *argv[],
 
 	assert(false);
 }
+
+void
+piglit_post_redisplay(void)
+{
+	if (!piglit_use_fbo && !piglit_automatic)
+		glutPostRedisplay();
+}

tests/util/piglit-framework.h

@@ -129,5 +129,6 @@ extern bool piglit_use_fbo;
 extern unsigned int piglit_winsys_fbo;
 
 extern void piglit_present_results();
+void piglit_post_redisplay(void);
 
 #endif /* PIGLIT_FRAMEWORK_H */

tests/util/piglit-util-gl.c

@@ -798,7 +798,7 @@ piglit_escape_exit_key(unsigned char key, int x, int y)
 			exit(0);
 			break;
 	}
-	glutPostRedisplay();
+	piglit_post_redisplay();
 }
 
 /**