security/initialized-vbo: test contents of uninitialized VBOs

Reviewed-by: José Fonseca <jfonseca@vmware.com>

2 files changed, 79 insertions, 0 deletions

diff --git a/tests/security/CMakeLists.gl.txt b/tests/security/CMakeLists.gl.txt
index 072a050f..db91e747 100644
--- a/tests/security/CMakeLists.gl.txt
+++ b/tests/security/CMakeLists.gl.txt
@@ -13,5 +13,6 @@ link_libraries (
 
 piglit_add_executable (initialized-texmemory initialized-texmemory.c)
 piglit_add_executable (initialized-fbo initialized-fbo.c)
+piglit_add_executable (initialized-vbo initialized-vbo.c)
 
 # vim: ft=cmake:
diff --git a/tests/security/initialized-vbo.c b/tests/security/initialized-vbo.c
new file mode 100644
index 00000000..2aaeebd1
--- /dev/null
+++ b/tests/security/initialized-vbo.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright © 2012 VMware, Inc.
+ *
+ * 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 VBO memory is initialized to a constant value and not stale
+ * data that may show previous contents of VRAM.
+ *
+ * To pass this test an OpenGL implementation should initialize the
+ * contents of the new buffer to some fixed value (like all zeros).
+ * But since that's not spec'd by OpenGL, we only return WARN instead of
+ * FAIL if that's not the case.
+ *
+ * Brian Paul
+ * June 2012
+ */
+
+#include "piglit-util.h"
+
+PIGLIT_GL_TEST_MAIN(
+    100 /*window_width*/,
+    100 /*window_height*/,
+    GLUT_RGB | GLUT_DOUBLE)
+
+
+enum piglit_result
+piglit_display(void)
+{
+	GLsizei size = 10 * 1000 * 1000;
+	GLuint buf;
+	GLubyte *tmp = malloc(size);
+	int i;
+	bool pass = true;
+
+	glGenBuffers(1, &buf);
+	glBindBuffer(GL_ARRAY_BUFFER, buf);
+	glBufferData(GL_ARRAY_BUFFER, size, NULL, GL_STATIC_DRAW);
+
+	glGetBufferSubData(GL_ARRAY_BUFFER, 0, size, tmp);
+
+	/* check if all same values */
+	for (i = 1; i < size; i++) {
+		if (tmp[i] != tmp[0]) {
+			pass = false;
+			break;
+		}
+	}
+
+	glDeleteBuffers(1, &buf);
+
+	return pass ? PIGLIT_PASS : PIGLIT_WARN;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_require_extension("GL_ARB_vertex_buffer_object");
+}