[RFC] Add tests for GL_AMD_depth_clamp_separate

Submitted by Sagar Ghuge on Aug. 2, 2018, 3:29 a.m.

Details

Message ID 20180802032939.2383-1-sagar.ghuge@intel.com
State New
Headers show
Series "Add tests for GL_AMD_depth_clamp_separate" ( rev: 1 ) in Piglit

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Commit Message

Sagar Ghuge Aug. 2, 2018, 3:29 a.m.
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
---
 tests/opengl.py                               |   8 +
 tests/spec/CMakeLists.txt                     |   1 +
 .../CMakeLists.gl.txt                         |  15 ++
 .../amd_depth_clamp_separate/CMakeLists.txt   |   1 +
 .../depth-clamp-far-status.c                  | 147 ++++++++++++++++
 .../depth-clamp-near-status.c                 | 148 ++++++++++++++++
 .../depth-clamp-range.c                       | 159 ++++++++++++++++++
 7 files changed, 479 insertions(+)
 create mode 100644 tests/spec/amd_depth_clamp_separate/CMakeLists.gl.txt
 create mode 100644 tests/spec/amd_depth_clamp_separate/CMakeLists.txt
 create mode 100644 tests/spec/amd_depth_clamp_separate/depth-clamp-far-status.c
 create mode 100644 tests/spec/amd_depth_clamp_separate/depth-clamp-near-status.c
 create mode 100644 tests/spec/amd_depth_clamp_separate/depth-clamp-range.c

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diff --git a/tests/opengl.py b/tests/opengl.py
index 397676e65..8108cbd97 100644
--- a/tests/opengl.py
+++ b/tests/opengl.py
@@ -1703,6 +1703,14 @@  with profile.test_list.group_manager(
     g(['depth-clamp-range'])
     g(['depth-clamp-status'])
 
+# AMD_depth_clamp_separate
+with profile.test_list.group_manager(
+        PiglitGLTest, grouptools.join('spec', 'AMD_depth_clamp_separate')) as g:
+    g(['amd_depth_clamp_far_status'])
+    g(['amd_depth_clamp_near_status'])
+    g(['amd_depth_clamp_separate_range'])
+
+# Group ARB_draw_elements_base_vertex
 # Group ARB_draw_elements_base_vertex
 with profile.test_list.group_manager(
         PiglitGLTest,
diff --git a/tests/spec/CMakeLists.txt b/tests/spec/CMakeLists.txt
index 6cf3f76ed..a4f2c333c 100644
--- a/tests/spec/CMakeLists.txt
+++ b/tests/spec/CMakeLists.txt
@@ -1,3 +1,4 @@ 
+add_subdirectory (amd_depth_clamp_separate)
 add_subdirectory (amd_performance_monitor)
 add_subdirectory (amd_pinned_memory)
 add_subdirectory (arb_arrays_of_arrays)
diff --git a/tests/spec/amd_depth_clamp_separate/CMakeLists.gl.txt b/tests/spec/amd_depth_clamp_separate/CMakeLists.gl.txt
new file mode 100644
index 000000000..40dad8f53
--- /dev/null
+++ b/tests/spec/amd_depth_clamp_separate/CMakeLists.gl.txt
@@ -0,0 +1,15 @@ 
+include_directories(
+	${GLEXT_INCLUDE_DIR}
+	${OPENGL_INCLUDE_PATH}
+)
+
+link_libraries (
+	piglitutil_${piglit_target_api}
+	${OPENGL_gl_LIBRARY}
+)
+
+piglit_add_executable (amd_depth_clamp_near_status depth-clamp-near-status.c)
+piglit_add_executable (amd_depth_clamp_far_status depth-clamp-far-status.c)
+piglit_add_executable (amd_depth_clamp_separate_range depth-clamp-range.c)
+
+# vim: ft=cmake:
diff --git a/tests/spec/amd_depth_clamp_separate/CMakeLists.txt b/tests/spec/amd_depth_clamp_separate/CMakeLists.txt
new file mode 100644
index 000000000..4a012b958
--- /dev/null
+++ b/tests/spec/amd_depth_clamp_separate/CMakeLists.txt
@@ -0,0 +1 @@ 
+piglit_include_target_api()
\ No newline at end of file
diff --git a/tests/spec/amd_depth_clamp_separate/depth-clamp-far-status.c b/tests/spec/amd_depth_clamp_separate/depth-clamp-far-status.c
new file mode 100644
index 000000000..7b5ad563b
--- /dev/null
+++ b/tests/spec/amd_depth_clamp_separate/depth-clamp-far-status.c
@@ -0,0 +1,147 @@ 
+/**
+ * Copyright © 2018 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.
+ */
+
+/**
+ * Test that GL_DEPTH_CLAMP_FAR_AMD is a valid state
+ *
+ * Table 6.9 (Transformation state) of OpenGL 4.1 Core added 
+ * DEPTH_CLAMP_FAR_AMD
+ *
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_core_version = 41;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+void
+piglit_init(int argc, char **argv)
+{
+	bool pass = true;
+	GLint i;
+	GLfloat f;
+	GLboolean b;
+	GLdouble d;
+
+	/* Check that GL_DEPTH_CLAMP_FAR_AMD was initialized to TRUE */
+	if (glIsEnabled(GL_DEPTH_CLAMP_FAR_AMD)) {
+		printf("GL_DEPTH_CLAMP_FAR_AMD was not initialized to FALSE\n");
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	/* Test that GL_DEPTH_CLAMP_FAR_AMD
+	 * is enable/disabled correctly
+	 */
+	glEnable(GL_DEPTH_CLAMP_FAR_AMD);
+	if (!glIsEnabled(GL_DEPTH_CLAMP_FAR_AMD)) {
+		printf("GL_DEPTH_CLAMP_FAR_AMD was not enabled properly\n");
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	/* Test that glIsEnabled(GL_DEPTH_CLAMP) is true
+	 * if glEnable(GL_DEPTH_CLAMP_FAR_AMD) true
+	 */
+	if (!glIsEnabled(GL_DEPTH_CLAMP)) {
+		printf("GL_DEPTH_CLAMP was not enabled properly\n");
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	glDisable(GL_DEPTH_CLAMP_FAR_AMD);
+	if (glIsEnabled(GL_DEPTH_CLAMP_FAR_AMD)) {
+		printf("GL_DEPTH_CLAMP_FAR_AMD was not disabled properly\n");
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	/* Test that GL_DEPTH_CLAMP_FAR_AMD
+	 * disabled is returned from glGet calls
+	 */
+	glGetIntegerv(GL_DEPTH_CLAMP_FAR_AMD, &i);
+	if(i != 0) {
+		printf("i expected to be 0, but returned %d\n", i);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetFloatv(GL_DEPTH_CLAMP_FAR_AMD, &f);
+	if(f != 0.0f) {
+		printf("f expected to be 0.0, but returned %f\n", f);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetBooleanv(GL_DEPTH_CLAMP_FAR_AMD, &b);
+	if(b != GL_FALSE) {
+		printf("b expected to be 0, but returned %d\n", (int)b);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetDoublev(GL_DEPTH_CLAMP_FAR_AMD, &d);
+	if(d != 0.0) {
+		printf("d expected to be 0.0, but returned %f\n", d);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	/* Test that GL_DEPTH_CLAMP_FAR_AMD enabled
+	 * is returned from glGet calls
+	 */
+	glEnable(GL_DEPTH_CLAMP_FAR_AMD);
+
+	glGetIntegerv(GL_DEPTH_CLAMP_FAR_AMD, &i);
+	if(i != 1) {
+		printf("i expected to be 1, but returned %d\n", i);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetFloatv(GL_DEPTH_CLAMP_FAR_AMD, &f);
+	if(f != 1.0f) {
+		printf("f expected to be 1.0, but returned %f\n", f);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetBooleanv(GL_DEPTH_CLAMP_FAR_AMD, &b);
+	if(b != GL_TRUE) {
+		printf("b expected to be 1, but returned %d\n", (int)b);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetDoublev(GL_DEPTH_CLAMP_FAR_AMD, &d);
+	if(d != 1.0) {
+		printf("d expected to be 1.0, but returned %f\n", d);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	return PIGLIT_FAIL;
+}
diff --git a/tests/spec/amd_depth_clamp_separate/depth-clamp-near-status.c b/tests/spec/amd_depth_clamp_separate/depth-clamp-near-status.c
new file mode 100644
index 000000000..0dcdf0c3f
--- /dev/null
+++ b/tests/spec/amd_depth_clamp_separate/depth-clamp-near-status.c
@@ -0,0 +1,148 @@ 
+/**
+ * Copyright © 2018 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.
+ */
+
+/**
+ * Test that GL_DEPTH_CLAMP_NEAR_AMD is a valid state
+ *
+ * Table 6.9 (Transformation state) of OpenGL 4.1 Core added 
+ * DEPTH_CLAMP_NEAR_AMD
+ *
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_core_version = 41;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+void
+piglit_init(int argc, char **argv)
+{
+	bool pass = true;
+	GLint i;
+	GLfloat f;
+	GLboolean b;
+	GLdouble d;
+
+	/* Check that GL_DEPTH_CLAMP_NEAR_AMD was initialized to TRUE */
+	if (glIsEnabled(GL_DEPTH_CLAMP_NEAR_AMD)) {
+		printf("GL_DEPTH_CLAMP_NEAR_AMD was not initialized to FALSE\n");
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	/* Test that GL_DEPTH_CLAMP_NEAR_AMD
+	 * is enable/disabled correctly
+	 */
+	glEnable(GL_DEPTH_CLAMP_NEAR_AMD);
+	if (!glIsEnabled(GL_DEPTH_CLAMP_NEAR_AMD)) {
+		printf("GL_DEPTH_CLAMP_NEAR_AMD was not enabled properly\n");
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	/* Test that glIsEnabled(GL_DEPTH_CLAMP) is true
+	 * if glEnable(GL_DEPTH_CLAMP_NEAR_AMD) true
+	 */
+	if (!glIsEnabled(GL_DEPTH_CLAMP)) {
+		printf("GL_DEPTH_CLAMP was not enabled properly\n");
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
+	if (glIsEnabled(GL_DEPTH_CLAMP_NEAR_AMD)) {
+		printf("GL_DEPTH_CLAMP_NEAR_AMD was not disabled properly\n");
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	/* Test that GL_DEPTH_CLAMP_NEAR_AMD
+	 * disabled is returned from glGet calls
+	 */
+	glGetIntegerv(GL_DEPTH_CLAMP_NEAR_AMD, &i);
+	if(i != 0) {
+		printf("i expected to be 0, but returned %d\n", i);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetFloatv(GL_DEPTH_CLAMP_NEAR_AMD, &f);
+	if(f != 0.0f) {
+		printf("f expected to be 0.0, but returned %f\n", f);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetBooleanv(GL_DEPTH_CLAMP_NEAR_AMD, &b);
+	if(b != GL_FALSE) {
+		printf("b expected to be 0, but returned %d\n", (int)b);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetDoublev(GL_DEPTH_CLAMP_NEAR_AMD, &d);
+	if(d != 0.0) {
+		printf("d expected to be 0.0, but returned %f\n", d);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+
+	/* Test that GL_DEPTH_CLAMP_NEAR_AMD enabled
+	 * is returned from glGet calls
+	 */
+	glEnable(GL_DEPTH_CLAMP_NEAR_AMD);
+
+	glGetIntegerv(GL_DEPTH_CLAMP_NEAR_AMD, &i);
+	if(i != 1) {
+		printf("i expected to be 1, but returned %d\n", i);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetFloatv(GL_DEPTH_CLAMP_NEAR_AMD, &f);
+	if(f != 1.0f) {
+		printf("f expected to be 1.0, but returned %f\n", f);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetBooleanv(GL_DEPTH_CLAMP_NEAR_AMD, &b);
+	if(b != GL_TRUE) {
+		printf("b expected to be 1, but returned %d\n", (int)b);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+	glGetDoublev(GL_DEPTH_CLAMP_NEAR_AMD, &d);
+	if(d != 1.0) {
+		printf("d expected to be 1.0, but returned %f\n", d);
+		pass = false;
+	}
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	return PIGLIT_FAIL;
+}
diff --git a/tests/spec/amd_depth_clamp_separate/depth-clamp-range.c b/tests/spec/amd_depth_clamp_separate/depth-clamp-range.c
new file mode 100644
index 000000000..37fc4a831
--- /dev/null
+++ b/tests/spec/amd_depth_clamp_separate/depth-clamp-range.c
@@ -0,0 +1,159 @@ 
+/*
+ * Copyright © 2018 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 depth-clamp-range.c
+ *
+ * Tests that AMD_depth_clamp_separate enablement didn't break DepthRange 
+ * functionality, and properly uses the min/max selection.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_core_version = 41;
+	config.khr_no_error_support = PIGLIT_NO_ERRORS;
+	config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_DEPTH;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static GLuint program;
+static GLint projection_loc;
+
+static GLuint
+make_program(void)
+{
+	static const char *vs_text =
+		"#version 330 \n"
+		"in vec4 vertex; \n"
+		"uniform mat4 projection; \n"
+		"void main() \n"
+		"{ \n"
+		"   gl_Position = projection * vertex; \n"
+		"} \n";
+
+	static const char *fs_text =
+		"#version 330 \n"
+		"void main() \n"
+		"{ \n"
+		"   gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0); \n"
+		"} \n";
+
+	GLuint program = piglit_build_simple_program(vs_text, fs_text);
+
+	return program;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_require_extension("GL_AMD_depth_clamp_separate");
+	program = make_program();
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	GLboolean pass = GL_TRUE;
+	float white[3] = {1.0, 1.0, 1.0};
+	float clear[3] = {0.0, 0.0, 0.0};
+
+	glClearDepth(0.5);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_LEQUAL);
+
+	glUseProgram(program);
+
+	projection_loc = glGetUniformLocation(program, "projection");
+	piglit_ortho_uniform(projection_loc, piglit_width, piglit_height);
+
+	/* Keep in mind that the ortho projection flips near and far's signs,
+	 * so 1.0 to quad()'s z maps to glDepthRange's near, and -1.0 maps to
+	 * glDepthRange's far.
+	 */
+
+	/* Basic glDepthRange testing. */
+	glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
+	glDisable(GL_DEPTH_CLAMP_FAR_AMD);
+	glDepthRange(0, 1);
+	piglit_draw_rect_z(0.5, 10, 10, 10, 10); /* .25 - drawn. */
+
+	glDepthRange(1, 0);
+	piglit_draw_rect_z(0.5, 10, 30, 10, 10); /* 0.75 - not drawn. */
+
+	/* Now, test that near depth clamping works.*/
+	glEnable(GL_DEPTH_CLAMP_NEAR_AMD);
+	glDepthRange(0.25, 1.0);
+	piglit_draw_rect_z(4, 30, 10, 10, 10); /* .25 - drawn. */
+
+	glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
+	glEnable(GL_DEPTH_CLAMP_FAR_AMD);
+	glDepthRange(0.75, 1.0);
+	piglit_draw_rect_z(4, 30, 30, 10, 10); /* 0.75 - not drawn. */
+
+	/* Test that far clamping works.*/
+	glDepthRange(0.0, 0.25);
+	piglit_draw_rect_z(-4, 50, 10, 10, 10); /* .25 - drawn. */
+
+	glDepthRange(0.0, 0.75);
+	piglit_draw_rect_z(-4, 50, 30, 10, 10); /* 0.75 - not drawn. */
+
+	/* Now, flip near and far around and make sure that it's doing the
+	 * min/max of near and far in the clamping.
+	 */
+
+	/* Test that near (max) clamping works. */
+	glEnable(GL_DEPTH_CLAMP_NEAR_AMD);
+	glDepthRange(0.25, 0.0);
+	piglit_draw_rect_z(4, 70, 10, 10, 10); /* .25 - drawn. */
+
+	glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
+	glEnable(GL_DEPTH_CLAMP_FAR_AMD);
+	glDepthRange(0.75, 0.0);
+	piglit_draw_rect_z(4, 70, 30, 10, 10); /* 0.75 - not drawn. */
+
+	/* Now, test far (min) clamping works. */
+	glDepthRange(1.0, 0.0);
+	piglit_draw_rect_z(-4, 90, 10, 10, 10); /* 0.0 - drawn. */
+
+	glDisable(GL_DEPTH_CLAMP_FAR_AMD);
+	glDepthRange(1.0, 0.75);
+	piglit_draw_rect_z(-4, 90, 30, 10, 10); /* 0.75 - drawn. */
+
+	pass = piglit_probe_pixel_rgb(15, 15, white) && pass;
+	pass = piglit_probe_pixel_rgb(15, 35, clear) && pass;
+	pass = piglit_probe_pixel_rgb(35, 15, white) && pass;
+	pass = piglit_probe_pixel_rgb(35, 35, clear) && pass;
+	pass = piglit_probe_pixel_rgb(55, 15, white) && pass;
+	pass = piglit_probe_pixel_rgb(55, 35, clear) && pass;
+	pass = piglit_probe_pixel_rgb(75, 15, white) && pass;
+	pass = piglit_probe_pixel_rgb(75, 35, clear) && pass;
+	pass = piglit_probe_pixel_rgb(95, 15, white) && pass;
+	pass = piglit_probe_pixel_rgb(95, 35, clear) && pass;
+
+	piglit_present_results();
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}