[Piglit] [PATCH 2/3] security/initialized-fbo: test contents of uninitialized renderbuffers

[Brian Paul]

---
 tests/all.tests                  |    1 +
 tests/security/CMakeLists.gl.txt |    1 +
 tests/security/initialized-fbo.c |  110 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 112 insertions(+), 0 deletions(-)
 create mode 100644 tests/security/initialized-fbo.c

diff --git a/tests/all.tests b/tests/all.tests
index eabf8ac..ba34f94 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -371,6 +371,7 @@ add_fbo_depthstencil_tests(general, 'default_fb')
 
 security = Group()
 add_plain_test(security, 'initialized-texmemory')
+add_plain_test(security, 'initialized-fbo')
 
 
 shaders = Group()
diff --git a/tests/security/CMakeLists.gl.txt b/tests/security/CMakeLists.gl.txt
index bddd591..072a050 100644
--- a/tests/security/CMakeLists.gl.txt
+++ b/tests/security/CMakeLists.gl.txt
@@ -12,5 +12,6 @@ link_libraries (
 
 
 piglit_add_executable (initialized-texmemory initialized-texmemory.c)
+piglit_add_executable (initialized-fbo initialized-fbo.c)
 
 # vim: ft=cmake:
diff --git a/tests/security/initialized-fbo.c b/tests/security/initialized-fbo.c
new file mode 100644
index 0000000..3ad5990
--- /dev/null
+++ b/tests/security/initialized-fbo.c
@@ -0,0 +1,110 @@
+/*
+ * 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 FBO memory is initialized to a constant color and not stale
+ * data that may show old 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(
+    512 /*window_width*/,
+    512 /*window_height*/,
+    GLUT_RGB | GLUT_DOUBLE)
+
+
+static GLuint fbo, rb;
+
+
+enum piglit_result
+piglit_display(void)
+{
+	GLfloat firstPixel[4];
+	bool pass = true;
+
+	/* read from fbo, draw to window */
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
+	glReadBuffer(GL_COLOR_ATTACHMENT0);
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+	glDrawBuffer(GL_BACK);
+
+        /* init color buffer to red */
+	glClearColor(1, 0, 0, 1);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	/* copy (undefined) fbo image to window */
+	glWindowPos2i(0, 0);
+	glCopyPixels(0, 0, piglit_width, piglit_height, GL_COLOR);
+
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+	glReadBuffer(GL_BACK);
+
+	glReadPixels(0, 0, 1, 1, GL_RGBA, GL_FLOAT, firstPixel);
+	pass = piglit_probe_rect_rgb(0, 0, piglit_width, piglit_height,
+				     firstPixel);
+
+	piglit_present_results();
+
+	return pass ? PIGLIT_PASS : PIGLIT_WARN;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_require_extension("GL_ARB_framebuffer_object");
+
+	glGenFramebuffers(1, &fbo);
+	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+	glGenRenderbuffers(1, &rb);
+	glBindRenderbuffer(GL_RENDERBUFFER, rb);
+	glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA,
+			      piglit_width, piglit_height);
+	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+				  GL_RENDERBUFFER, rb);
+
+	if (!piglit_check_gl_error(GL_NO_ERROR)) {
+		printf("fbo creation error\n");
+		piglit_report_result(PIGLIT_FAIL);
+		return;
+	}
+
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
+	    GL_FRAMEBUFFER_COMPLETE) {
+		printf("fbo incomplete\n");
+		piglit_report_result(PIGLIT_FAIL);
+		return;
+	}
+
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+	glViewport(0, 0, piglit_width, piglit_height);
+}
-- 
1.7.3.4