[Piglit] [PATCH 6/7] EXT_framebuffer_multisample/samples: Test for GL_SAMPLES and GL_SAMPLE_BUFFERS.

[Eric Anholt]

---
 tests/all.tests                                    |    1 +
 .../ext_framebuffer_multisample/CMakeLists.gl.txt  |    1 +
 tests/spec/ext_framebuffer_multisample/samples.c   |  119 ++++++++++++++++++++
 3 files changed, 121 insertions(+), 0 deletions(-)
 create mode 100644 tests/spec/ext_framebuffer_multisample/samples.c

diff --git a/tests/all.tests b/tests/all.tests
index 1cea5de..810cb0d 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -1220,6 +1220,7 @@ ext_framebuffer_multisample['negative-max-samples'] = concurrent_test('ext_frame
 ext_framebuffer_multisample['negative-readpixels'] = concurrent_test('ext_framebuffer_multisample-negative-readpixels')
 ext_framebuffer_multisample['renderbufferstorage-samples'] = concurrent_test('ext_framebuffer_multisample-renderbufferstorage-samples')
 ext_framebuffer_multisample['renderbuffer-samples'] = concurrent_test('ext_framebuffer_multisample-renderbuffer-samples')
+ext_framebuffer_multisample['samples'] = concurrent_test('ext_framebuffer_multisample-samples')
 
 ext_framebuffer_object = Group()
 spec['EXT_framebuffer_object'] = ext_framebuffer_object
diff --git a/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt b/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
index 1823ea5..2e12dfa 100644
--- a/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
+++ b/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
@@ -18,3 +18,4 @@ add_executable (ext_framebuffer_multisample-negative-max-samples negative-max-sa
 add_executable (ext_framebuffer_multisample-negative-readpixels negative-readpixels.c)
 add_executable (ext_framebuffer_multisample-renderbuffer-samples renderbuffer-samples.c)
 add_executable (ext_framebuffer_multisample-renderbufferstorage-samples renderbufferstorage-samples.c)
+add_executable (ext_framebuffer_multisample-samples samples.c)
diff --git a/tests/spec/ext_framebuffer_multisample/samples.c b/tests/spec/ext_framebuffer_multisample/samples.c
new file mode 100644
index 0000000..b9f0c0e
--- /dev/null
+++ b/tests/spec/ext_framebuffer_multisample/samples.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright © 2011 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.
+ */
+
+#include "piglit-util.h"
+
+/**
+ * @file samples.c
+ *
+ * From the EXT_framebuffer_multisample spec:
+ *
+ *     "The values of SAMPLE_BUFFERS and SAMPLES are derived from the
+ *      attachments of the currently bound framebuffer object.  If the
+ *      current DRAW_FRAMEBUFFER_BINDING_EXT is not "framebuffer
+ *      complete", then both SAMPLE_BUFFERS and SAMPLES are undefined.
+ *      Otherwise, SAMPLES is equal to the value of
+ *      RENDERBUFFER_SAMPLES_EXT for the attached images (which all
+ *      must have the same value for RENDERBUFFER_SAMPLES_EXT).
+ *      Further, SAMPLE_BUFFERS is one if SAMPLES is non-zero.
+ *      Otherwise, SAMPLE_BUFFERS is zero."
+ *
+ * See also negative-mismatched-samples.c.
+ */
+
+int piglit_width = 32;
+int piglit_height = 32;
+int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB | GLUT_ALPHA;
+
+enum piglit_result
+piglit_display(void)
+{
+	/* UNREACHED */
+	return PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	GLint max_samples, sample_buffers, samples, rb_samples;
+	GLuint rb, fb;
+	GLenum status;
+	bool pass = true;
+	int i;
+
+	piglit_require_extension("GL_EXT_framebuffer_multisample");
+
+	glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
+
+	glGenFramebuffersEXT(1, &fb);
+	glBindFramebufferEXT(GL_FRAMEBUFFER, fb);
+
+	glDrawBuffer(GL_COLOR_ATTACHMENT0);
+	glReadBuffer(GL_COLOR_ATTACHMENT0);
+
+	for (i = 0; i < max_samples; i++) {
+		glGenRenderbuffersEXT(1, &rb);
+		glBindRenderbufferEXT(GL_RENDERBUFFER, rb);
+		glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER,
+						    max_samples,
+						    GL_RGBA, 1, 1);
+
+		glFramebufferRenderbufferEXT(GL_FRAMEBUFFER,
+					     GL_COLOR_ATTACHMENT0,
+					     GL_RENDERBUFFER, rb);
+
+		status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER);
+		if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+			fprintf(stderr, "FBO incomplete\n");
+			piglit_report_result(PIGLIT_FAIL);
+		}
+
+		glGetRenderbufferParameterivEXT(GL_RENDERBUFFER,
+						GL_RENDERBUFFER_SAMPLES,
+						&rb_samples);
+
+		glGetIntegerv(GL_SAMPLES, &samples);
+		if (rb_samples != samples) {
+			fprintf(stderr,
+				"FBO reported GL_SAMPLES %d for "
+				"rb samples %d\n",
+				samples, rb_samples);
+			pass = false;
+		}
+
+		glGetIntegerv(GL_SAMPLE_BUFFERS, &sample_buffers);
+		if ((rb_samples != 0) != (sample_buffers == 1)) {
+			fprintf(stderr,
+				"FBO reported GL_SAMPLE_BUFFERS %d for "
+				"rb samples %d\n",
+				sample_buffers, samples);
+			pass = false;
+		}
+
+		glDeleteRenderbuffersEXT(1, &rb);
+	}
+
+	glDeleteFramebuffersEXT(1, &fb);
+
+	piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
-- 
1.7.7.3