fbo: Add the first in a series of negative FBO completeness tests

This test will eventually contain a number of subtests that verify
certain framebuffer incompleteness scenarios.

The first test tries a 0x0 color texture (and renderbuffer).  This
should result in GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT, but in Mesa it
results in a segfault instead.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

1 files changed, 220 insertions, 0 deletions

diff --git a/tests/fbo/fbo-incomplete.cpp b/tests/fbo/fbo-incomplete.cpp
new file mode 100644
index 000000000..a13da8960
--- /dev/null
+++ b/tests/fbo/fbo-incomplete.cpp
@@ -0,0 +1,220 @@
+/*
+ * Copyright © 2013 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 fbo-incomplete.c
+ * Collection of negative framebuffer completeness tests.
+ */
+
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 10;
+
+	config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static const float green[] = { 0.f, 1.f, 0.f, 1.f };
+
+class incomplete_fbo_test {
+public:
+
+	incomplete_fbo_test(const char *_name, GLenum _target)
+		: name(_name), target(_target), tex(0), rb(0), fbo(0),
+		  _pass(true)
+	{
+		if (target == GL_RENDERBUFFER) {
+			glGenRenderbuffers(1, &rb);
+			glBindRenderbuffer(target, rb);
+		} else {
+			glGenTextures(1, &tex);
+			glBindTexture(target, tex);
+			glTexParameteri(target,
+					GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		}
+
+		glGenFramebuffers(1, &fbo);
+		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
+	}
+
+
+	~incomplete_fbo_test()
+	{
+		if (target == GL_RENDERBUFFER)
+			glBindRenderbuffer(target, 0);
+		else
+			glBindTexture(target, 0);
+
+		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+		glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+
+		glDeleteTextures(1, &tex);
+		glDeleteRenderbuffers(1, &rb);
+		glDeleteFramebuffers(1, &fbo);
+
+		piglit_report_subtest_result(_pass ? PIGLIT_PASS : PIGLIT_FAIL,
+					     name);
+	}
+
+	bool check_fbo_status(GLenum expect)
+	{
+		GLenum status = glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER);
+		if (status != expect) {
+			fprintf(stderr,
+				"status was %s (0x%04x), "
+				"expected %s (0x%04x).\n",
+				piglit_get_gl_enum_name(status),
+				status,
+				piglit_get_gl_enum_name(expect),
+				expect);
+			return false;
+		}
+
+		return true;
+	}
+
+	bool pass()
+	{
+		_pass = true;
+		return true;
+	}
+
+	bool fail()
+	{
+		_pass = false;
+		return false;
+	}
+
+	const char *name;
+	GLenum target;
+	GLuint tex;
+	GLuint rb;
+	GLuint fbo;
+
+private:
+	bool _pass;
+};
+
+/**
+ * Verify that attaching a 0x0 texture results in incompleteness.
+ */
+bool
+incomplete_0_by_0_texture(void)
+{
+	incomplete_fbo_test t("0x0 texture", GL_TEXTURE_2D);
+
+	/* Attach a 0x0 texture to the framebuffer.  That should make it
+	 * incomplete.
+	 */
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, 0, GL_RGBA,
+		     GL_UNSIGNED_BYTE, NULL);
+	glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+			       GL_TEXTURE_2D, t.tex, 0);
+
+	if (!piglit_check_gl_error(GL_NO_ERROR))
+		return t.fail();
+
+	if (!t.check_fbo_status(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT))
+		return t.fail();
+
+	/* Allocate some storage for the texture and verify that the FBO is
+	 * now complete.
+	 */
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 4, 4, 0, GL_RGBA,
+		     GL_UNSIGNED_BYTE, NULL);
+
+	if (!t.check_fbo_status(GL_FRAMEBUFFER_COMPLETE))
+		return t.fail();
+
+	/* Verify that simple rendering can occur to the FBO.
+	 */
+	glClearColor(0.f, 1.f, 0.f, 1.f);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, t.fbo);
+	if (!piglit_probe_rect_rgba(0, 0, 4, 4, green))
+		return t.fail();
+
+	return t.pass();
+}
+
+/**
+ * Verify that attaching a 0x0 renderbuffer results in incompleteness.
+ */
+bool
+incomplete_0_by_0_renderbuffer(void)
+{
+	incomplete_fbo_test t("0x0 renderbuffer", GL_RENDERBUFFER);
+
+	/* Attach a 0x0 renderbuffer to the framebuffer.  That should make it
+	 * incomplete.
+	 */
+	glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, 0, 0);
+	glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+				  GL_RENDERBUFFER, t.rb);
+	if (!piglit_check_gl_error(GL_NO_ERROR))
+		return t.fail();
+
+	if (!t.check_fbo_status(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT))
+		return t.fail();
+
+	/* Allocate some storage for the renderbuffer and verify that
+	 * the FBO is now complete.
+	 */
+	glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, 4, 4);
+
+	if (!t.check_fbo_status(GL_FRAMEBUFFER_COMPLETE))
+		return t.fail();
+
+	/* Verify that simple rendering can occur to the FBO.
+	 */
+	glClearColor(0.f, 1.f, 0.f, 1.f);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, t.fbo);
+	if (!piglit_probe_rect_rgba(0, 0, 4, 4, green))
+		return t.fail();
+
+	return t.pass();
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	return PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	bool pass = true;
+
+	piglit_require_extension("GL_ARB_framebuffer_object");
+
+	pass = incomplete_0_by_0_texture() && pass;
+	pass = incomplete_0_by_0_renderbuffer() && pass;
+
+	piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}