arb_framebuffer_no_attachments: add atomic counter test

Tests interaction with ARB_shader_atomic_counters. Test passes
on Nvidia binary driver (version 346.35).

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>

2 files changed, 167 insertions, 0 deletions

diff --git a/tests/spec/arb_framebuffer_no_attachments/CMakeLists.gl.txt b/tests/spec/arb_framebuffer_no_attachments/CMakeLists.gl.txt
index 53aba8ce4..311d62fec 100755
--- a/tests/spec/arb_framebuffer_no_attachments/CMakeLists.gl.txt
+++ b/tests/spec/arb_framebuffer_no_attachments/CMakeLists.gl.txt
@@ -11,3 +11,4 @@ link_libraries (
 
 piglit_add_executable (arb_framebuffer_no_attachments-minmax minmax.c)
 piglit_add_executable (arb_framebuffer_no_attachments-params params.c)
+piglit_add_executable (arb_framebuffer_no_attachments-atomic atomic.c)
diff --git a/tests/spec/arb_framebuffer_no_attachments/atomic.c b/tests/spec/arb_framebuffer_no_attachments/atomic.c
new file mode 100644
index 000000000..c32990fec
--- /dev/null
+++ b/tests/spec/arb_framebuffer_no_attachments/atomic.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright © 2015 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 atomic.c
+ *
+ * Test atomic counters with when a framebuffer with no attachments is bound.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_core_version = 31;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+const char *vs_source =
+	"#version 140\n"
+	"in vec4 piglit_vertex;\n"
+	"void main() {\n"
+	"	gl_Position = piglit_vertex;\n"
+	"}\n";
+
+const char *fs_source =
+	"#version 140\n"
+	"#extension GL_ARB_shader_atomic_counters : enable\n"
+	"layout(binding = 0, offset = 0) uniform atomic_uint counter;\n"
+	"void main() {\n"
+	"	atomicCounterIncrement(counter);\n"
+	"}\n";
+
+enum piglit_result
+piglit_display(void)
+{
+	return PIGLIT_FAIL;
+}
+
+static void
+reset_counter()
+{
+	/* Reset value of atomic counter. */
+	uint32_t *ptr =
+		(uint32_t *) glMapBufferRange(GL_ATOMIC_COUNTER_BUFFER, 0,
+			sizeof(uint32_t), GL_MAP_WRITE_BIT);
+	*ptr = 0;
+	glUnmapBuffer(GL_ATOMIC_COUNTER_BUFFER);
+}
+
+static bool
+compare_counter(uint32_t value, const char *subtest)
+{
+	/* Map atomic buffer and check that we have expected results. */
+	bool result = false;
+	uint32_t *ptr =
+		(uint32_t *) glMapBufferRange(GL_ATOMIC_COUNTER_BUFFER, 0,
+			sizeof(uint32_t), GL_MAP_READ_BIT);
+	result = (*ptr == value);
+	if (!result)
+		fprintf(stderr, "%s (subtest %s): expected %u, got %u\n",
+			__func__, subtest, value, *ptr);
+	glUnmapBuffer(GL_ATOMIC_COUNTER_BUFFER);
+	piglit_report_subtest_result(result ? PIGLIT_PASS : PIGLIT_FAIL,
+		subtest);
+	return result;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	GLuint buffer, fbo, vao;
+	GLint prog;
+	bool pass = true;
+	uint32_t counter = 0;
+
+	piglit_require_gl_version(31);
+	piglit_require_extension("GL_ARB_framebuffer_no_attachments");
+	piglit_require_extension("GL_ARB_shader_atomic_counters");
+
+	/* Create fbo with no attachments. */
+	glGenFramebuffers(1, &fbo);
+	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+
+	/* Setup default width and height. */
+	glFramebufferParameteri(GL_FRAMEBUFFER,
+		GL_FRAMEBUFFER_DEFAULT_WIDTH, piglit_width);
+	glFramebufferParameteri(GL_FRAMEBUFFER,
+		GL_FRAMEBUFFER_DEFAULT_HEIGHT, piglit_height);
+
+	/* Check that fbo is marked complete. */
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
+		GL_FRAMEBUFFER_COMPLETE)
+		piglit_report_result(PIGLIT_FAIL);
+
+	prog = piglit_build_simple_program(vs_source, fs_source);
+
+	/* Check that there are no errors. */
+	if (!prog || !piglit_check_gl_error(GL_NO_ERROR))
+		piglit_report_result(PIGLIT_FAIL);
+
+	glUseProgram(prog);
+
+	/* Create atomic counter buffer. */
+	glGenBuffers(1, &buffer);
+	glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, buffer);
+	glBufferData(GL_ATOMIC_COUNTER_BUFFER,
+		sizeof(uint32_t), &counter, GL_DYNAMIC_DRAW);
+
+	if (!piglit_check_gl_error(GL_NO_ERROR))
+		piglit_report_result(PIGLIT_FAIL);
+
+	/* Render rectangle using our program. */
+	glGenVertexArrays(1, &vao);
+	glBindVertexArray(vao);
+
+	piglit_draw_rect(-1, -1, 2, 2);
+
+	pass = pass && compare_counter(piglit_width * piglit_height, "Basic");
+
+	/* Reset counter and set 1x1 scissor rectangle. */
+	reset_counter();
+
+	glEnable(GL_SCISSOR_TEST);
+	glScissor(0, 0, 1, 1);
+
+	piglit_draw_rect(-1, -1, 2, 2);
+
+	glDisable(GL_SCISSOR_TEST);
+
+	pass = pass && compare_counter(1, "glScissor");
+
+	/* Reset counter and set 2x2 viewport. */
+	reset_counter();
+	glViewport(0, 0, 2, 2);
+
+	piglit_draw_rect(-1, -1, 2, 2);
+
+	pass = pass && compare_counter(4, "glViewport");
+
+	glDeleteFramebuffers(1, &fbo);
+	glDeleteVertexArrays(1, &vao);
+	glDeleteBuffers(1, &buffer);
+	glDeleteProgram(prog);
+
+	piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}