commit da93767346ee206eee9e22c99377cdc41869c388
Author: Gordon Jin <gordon.jin@intel.com>
Date:   Fri Feb 25 10:27:58 2011 +0800

    add shader test glsl-link-global-init

diff --git a/tests/all.tests b/tests/all.tests
index 072208f..642fec5 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -729,6 +729,7 @@ add_shader_generic(shaders, 'glsl-link-varyings-1')
 add_shader_generic(shaders, 'glsl-link-varyings-2')
 add_shader_generic(shaders, 'glsl-link-varyings-3')
 add_shader_generic(shaders, 'glsl-link-varying-TexCoord')
+add_shader_generic(shaders, 'glsl-link-global-init')
 add_shader_generic(shaders, 'glsl-override-builtin')
 add_shader_generic(shaders, 'glsl-override-builtin-2')
 add_plain_test(shaders, 'glsl-kwin-blur-1')
diff --git a/tests/shaders/CMakeLists.txt b/tests/shaders/CMakeLists.txt
index 27a7806..80f8fe6 100644
--- a/tests/shaders/CMakeLists.txt
+++ b/tests/shaders/CMakeLists.txt
@@ -121,6 +121,7 @@ add_executable (glsl-link-initializer-06 glsl-link-initializer-06.c)
 add_executable (glsl-link-invariant-01 glsl-link-invariant-01.c)
 add_executable (glsl-link-centroid-01 glsl-link-centroid-01.c)
 add_executable (glsl-link-struct-array glsl-link-struct-array.c)
+add_executable (glsl-link-global-init glsl-link-global-init.c)
 add_executable (gpu_shader4_attribs gpu_shader4_attribs.c)
 add_executable (vp-address-01 vp-address-01.c)
 add_executable (vp-address-02 vp-address-02.c)
diff --git a/tests/shaders/glsl-link-global-init-a.vert b/tests/shaders/glsl-link-global-init-a.vert
new file mode 100644
index 0000000..f8dc990
--- /dev/null
+++ b/tests/shaders/glsl-link-global-init-a.vert
@@ -0,0 +1,7 @@
+float f = 0.1;
+void myfunc();
+void main()
+{
+	myfunc();
+	gl_Position = gl_Vertex;
+}
diff --git a/tests/shaders/glsl-link-global-init-b.vert b/tests/shaders/glsl-link-global-init-b.vert
new file mode 100644
index 0000000..a1f4d3b
--- /dev/null
+++ b/tests/shaders/glsl-link-global-init-b.vert
@@ -0,0 +1,4 @@
+float f = 0.2;
+void myfunc()
+{
+}
diff --git a/tests/shaders/glsl-link-global-init.c b/tests/shaders/glsl-link-global-init.c
new file mode 100644
index 0000000..4cf1702
--- /dev/null
+++ b/tests/shaders/glsl-link-global-init.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/**
+ * \file glsl-link-global-init.c
+ *
+ * Negative test for initializing a shared global in 2 shaders to different
+ * values.
+ *
+ * The test verifies that linking these 2 shaders together results in an error, 
+ * according to GLSL 1.10 section 4.2:
+ * All initializers for a shared global must have the same value, or a link
+ * error will result.
+ *
+ * \author Gordon Jin
+ */
+
+#include "piglit-util.h"
+
+int piglit_width = 100, piglit_height = 100;
+int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
+
+enum piglit_result
+piglit_display(void)
+{
+	return PIGLIT_FAILURE;
+}
+
+/**
+ * Don't use piglit_link_check_status because it will log a message to stderr
+ * when the link fails.  Since this test wants the link to fail, logging an
+ * error message will cause the test to be listed as "warn" instead of "pass".
+ */
+GLboolean
+link_check_status(GLint prog)
+{
+	GLint ok;
+
+	glGetProgramiv(prog, GL_LINK_STATUS, &ok);
+	if (!ok) {
+		GLchar *info;
+		GLint size;
+
+		glGetProgramiv(prog, GL_INFO_LOG_LENGTH, &size);
+		info = malloc(size);
+
+		glGetProgramInfoLog(prog, size, NULL, info);
+		printf("Failed to link: %s\n", info);
+
+		free(info);
+	}
+
+	return ok;
+}
+
+void piglit_init(int argc, char **argv)
+{
+	GLint vert[2];
+	GLint prog;
+	GLboolean ok;
+
+	if (!GLEW_VERSION_2_0) {
+		printf("Requires OpenGL 2.0\n");
+		piglit_report_result(PIGLIT_SKIP);
+	}
+
+	vert[0] =
+		piglit_compile_shader(GL_VERTEX_SHADER,
+				      "shaders/glsl-link-global-init-a.vert");
+	vert[1] =
+		piglit_compile_shader(GL_VERTEX_SHADER,
+				      "shaders/glsl-link-global-init-b.vert");
+	prog = glCreateProgram();
+	glAttachShader(prog, vert[0]);
+	glAttachShader(prog, vert[1]);
+	glLinkProgram(prog);
+
+	ok = link_check_status(prog);
+	if (ok)
+		fprintf(stderr,
+			"Program should have failed linking, but "
+			"it was (incorrectly) successful.\n");
+
+	piglit_report_result((!ok) ? PIGLIT_SUCCESS : PIGLIT_FAILURE);
+}
+