[Piglit] [PATCH 11/11] arb_clear_buffer_object: Clear a 0-length range.

[Fabian Bieler]

Check that clearing of 0-length ranges is a no-op that doesn't generate any
errors.

Signed-off-by: Fabian Bieler <fabianbieler at fastmail.fm>
---
 tests/all.py                                       |  1 +
 .../spec/arb_clear_buffer_object/CMakeLists.gl.txt |  1 +
 tests/spec/arb_clear_buffer_object/zero-size.c     | 93 ++++++++++++++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 tests/spec/arb_clear_buffer_object/zero-size.c

diff --git a/tests/all.py b/tests/all.py
index b6ddcef..2ab1d2a 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -3056,6 +3056,7 @@ add_concurrent_test(arb_clear_buffer_object, 'arb_clear_buffer_object-sub-invali
 add_concurrent_test(arb_clear_buffer_object, 'arb_clear_buffer_object-sub-mapped')
 add_concurrent_test(arb_clear_buffer_object, 'arb_clear_buffer_object-sub-overlap')
 add_concurrent_test(arb_clear_buffer_object, 'arb_clear_buffer_object-sub-simple')
+add_concurrent_test(arb_clear_buffer_object, 'arb_clear_buffer_object-zero-size')
 
 arb_copy_buffer = Group()
 spec['ARB_copy_buffer'] = arb_copy_buffer
diff --git a/tests/spec/arb_clear_buffer_object/CMakeLists.gl.txt b/tests/spec/arb_clear_buffer_object/CMakeLists.gl.txt
index a5cf930..3a1565d 100644
--- a/tests/spec/arb_clear_buffer_object/CMakeLists.gl.txt
+++ b/tests/spec/arb_clear_buffer_object/CMakeLists.gl.txt
@@ -18,5 +18,6 @@ piglit_add_executable (arb_clear_buffer_object-sub-invalid-size sub-invalid-size
 piglit_add_executable (arb_clear_buffer_object-sub-mapped sub-mapped.c common.c)
 piglit_add_executable (arb_clear_buffer_object-sub-overlap sub-overlap.c common.c)
 piglit_add_executable (arb_clear_buffer_object-sub-simple sub-simple.c common.c)
+piglit_add_executable (arb_clear_buffer_object-zero-size zero-size.c common.c)
 
 # vim: ft=cmake:
diff --git a/tests/spec/arb_clear_buffer_object/zero-size.c b/tests/spec/arb_clear_buffer_object/zero-size.c
new file mode 100644
index 0000000..400a4f3
--- /dev/null
+++ b/tests/spec/arb_clear_buffer_object/zero-size.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright © 2014 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 zero-size.c
+ *
+ * Clear with size set to zero and verify that the buffer data was not altered.
+ */
+
+#include "piglit-util-gl-common.h"
+#include "common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 15;
+	config.supports_gl_core_version = 31;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+enum piglit_result
+piglit_display(void)
+{
+	return PIGLIT_PASS;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	bool pass = true;
+	const int buffer_size = 1<<20;
+	unsigned int buffer;
+	static const char *const data_zero = "\x00\x00\x00\x00";
+	static const char *const data_init = "\xff\xff\xff\xff"
+					     "\xff\xff\xff\xff"
+					     "\x00\x00\x00\x00"
+					     "\x00\x00\x00\x00"
+					     "\x55\x55\x55\x55"
+					     "\x55\x55\x55\x55"
+					     "\xaa\xaa\xaa\xaa"
+					     "\xaa\xaa\xaa\xaa"
+					     "\xff\x00\xff\x00"
+					     "\xff\x00\xff\x00"
+					     "\x00\xff\x00\xff"
+					     "\x00\xff\x00\xff"
+					     "\x91\xcc\x45\x36"
+					     "\xd3\xe4\xe3\x5b"
+					     "\x79\x1e\x21\x39"
+					     "\xa8\xfa\x69\x6a";
+
+
+	piglit_require_extension("GL_ARB_clear_buffer_object");
+
+	glGenBuffers(1, &buffer);
+	glBindBuffer(GL_ARRAY_BUFFER, buffer);
+	glBufferData(GL_ARRAY_BUFFER, buffer_size, NULL, GL_STREAM_READ);
+	fill_array_buffer(64, data_init);
+
+	glClearBufferSubData(GL_ARRAY_BUFFER, GL_RGBA8, 0, 0, GL_RGBA,
+			GL_UNSIGNED_BYTE, data_zero);
+	glClearBufferSubData(GL_ARRAY_BUFFER, GL_RGBA8, buffer_size/2, 0, GL_RGBA,
+			GL_UNSIGNED_BYTE, data_zero);
+	glClearBufferSubData(GL_ARRAY_BUFFER, GL_RGBA8, buffer_size, 0, GL_RGBA,
+			GL_UNSIGNED_BYTE, data_zero);
+
+	pass = check_array_buffer_data(64, data_init) && pass;
+
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
+	glDeleteBuffers(1, &buffer);
+
+	pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+	piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
-- 
1.8.3.2