[Piglit] [PATCH] arb_fragment_shader_interlock: Test image load/store.

Plamena Manolova plamena.manolova at intel.com
Wed Apr 19 00:58:23 UTC 2017


A test to check whether GL_ARB_fragment_shader_interlock operates as
expected. This test simulates blending behaviour by using image loads/stores
to a 3D texture. The bledning formula used is:
result = current_alpha * current_color + (1 - current_alpha) * previous_color
Multisampling is also enabled and tested at 2, 4, 8 and 16.

Signed-off-by: Plamena Manolova <plamena.manolova at intel.com>
---
 tests/all.py                                       |   5 +
 tests/spec/CMakeLists.txt                          |   1 +
 .../CMakeLists.gl.txt                              |  12 +
 .../arb_fragment_shader_interlock/CMakeLists.txt   |   1 +
 .../image-load-store.c                             | 298 +++++++++++++++++++++
 5 files changed, 317 insertions(+)
 create mode 100644 tests/spec/arb_fragment_shader_interlock/CMakeLists.gl.txt
 create mode 100644 tests/spec/arb_fragment_shader_interlock/CMakeLists.txt
 create mode 100644 tests/spec/arb_fragment_shader_interlock/image-load-store.c

diff --git a/tests/all.py b/tests/all.py
index a832ffb..1a28e62 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -4803,6 +4803,11 @@ with profile.test_list.group_manager(
     g(['arb_post_depth_coverage-sample-shading'])
 
 with profile.test_list.group_manager(
+        PiglitGLTest,
+        grouptools.join('spec', 'arb_fragment_shader_interlock')) as g:
+    g(['arb_fragment_shader_interlock-image-load-store'])
+
+with profile.test_list.group_manager(
     PiglitGLTest,
     grouptools.join('spec', 'arb_shader_image_size')) as g:
     g(['arb_shader_image_size-builtin'], 'builtin')
diff --git a/tests/spec/CMakeLists.txt b/tests/spec/CMakeLists.txt
index 5bdde84..5bfa76b 100644
--- a/tests/spec/CMakeLists.txt
+++ b/tests/spec/CMakeLists.txt
@@ -160,3 +160,4 @@ add_subdirectory (arb_shader_texture_image_samples)
 add_subdirectory (arb_texture_barrier)
 add_subdirectory (intel_conservative_rasterization)
 add_subdirectory (arb_post_depth_coverage)
+add_subdirectory (arb_fragment_shader_interlock)
diff --git a/tests/spec/arb_fragment_shader_interlock/CMakeLists.gl.txt b/tests/spec/arb_fragment_shader_interlock/CMakeLists.gl.txt
new file mode 100644
index 0000000..d8bb7da
--- /dev/null
+++ b/tests/spec/arb_fragment_shader_interlock/CMakeLists.gl.txt
@@ -0,0 +1,12 @@
+include_directories(
+	${GLEXT_INCLUDE_DIR}
+	${OPENGL_INCLUDE_PATH}
+)
+
+link_libraries (
+	piglitutil_${piglit_target_api}
+	${OPENGL_gl_LIBRARY}
+)
+
+piglit_add_executable (arb_fragment_shader_interlock-image-load-store
+	image-load-store.c)
diff --git a/tests/spec/arb_fragment_shader_interlock/CMakeLists.txt b/tests/spec/arb_fragment_shader_interlock/CMakeLists.txt
new file mode 100644
index 0000000..144a306
--- /dev/null
+++ b/tests/spec/arb_fragment_shader_interlock/CMakeLists.txt
@@ -0,0 +1 @@
+piglit_include_target_api()
diff --git a/tests/spec/arb_fragment_shader_interlock/image-load-store.c b/tests/spec/arb_fragment_shader_interlock/image-load-store.c
new file mode 100644
index 0000000..2f4a7d0
--- /dev/null
+++ b/tests/spec/arb_fragment_shader_interlock/image-load-store.c
@@ -0,0 +1,298 @@
+/*
+ * Copyright (c) 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.
+ */
+
+#include "piglit-util-gl.h"
+
+/*
+ * A test to check whether GL_ARB_fragment_shader_interlock operates as
+ * expected. This test simulates blending behaviour by using image loads/stores
+ * to a 3D texture. The bledning formula used is:
+ * result = current_alpha * current_color + (1 - current_alpha) * previous_color
+ * Multisampling is also enabled and tested at 2, 4, 8 and 16.
+ */
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+	config.supports_gl_compat_version = 42;
+	config.supports_gl_core_version = 42;
+	config.window_width = 100;
+	config.window_height = 100;
+	config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DEPTH |
+		PIGLIT_GL_VISUAL_DOUBLE;
+PIGLIT_GL_TEST_CONFIG_END
+
+static GLuint prog, vao, tex_frame, tex_blend, fbo;
+
+static GLuint
+make_fbo(void)
+{
+	GLuint fbo;
+	glGenFramebuffers(1, &fbo);
+	glBindFramebuffer(GL_FRAMEBUFFER, fbo );
+	glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex_frame);
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+		GL_TEXTURE_2D_MULTISAMPLE, tex_frame, 0);
+
+	return fbo;
+}
+
+static GLuint
+make_shader_program(void)
+{
+	static const char *vs_text =
+		"#version 430\n"
+		"layout(location = 0) in vec4 pos_in;\n"
+		"layout(location = 1) in vec4 col_in;\n"
+		"smooth out vec4 col_vary;\n"
+		"void main()\n"
+		"{\n"
+		"	gl_Position = pos_in;\n"
+		"	col_vary = col_in;\n"
+		"}\n";
+
+	static const char *fs_text =
+		"#version 430\n"
+		"#extension GL_ARB_fragment_shader_interlock: require\n"
+		"layout(sample_interlock_ordered) in;\n"
+		"layout(rgba32f, binding = 0) uniform image3D img_output;\n"
+		"layout(location = 1) uniform int sample_rate;\n"
+		"smooth in vec4 col_vary;\n"
+		"out vec4 col_out;\n"
+		"void main()\n"
+		"{\n"
+		"	vec4 result = vec4(0.0, 0.0, 0.0, 1.0);\n"
+		"	ivec3 current_sample_coord = ivec3(gl_FragCoord.x, gl_FragCoord.y, gl_SampleID);\n"
+		"	ivec3 result_coord = ivec3(gl_FragCoord.x, gl_FragCoord.y, sample_rate);\n"
+		"	int i;\n"
+		"	beginInvocationInterlockARB();\n"
+		"	vec4 current_sample_color = imageLoad(img_output, current_sample_coord);\n"
+		"	result.rgb += col_vary.a * col_vary.rgb + (1 - col_vary.a) * current_sample_color.rgb;\n"
+		"	imageStore(img_output, current_sample_coord, result);\n"
+		"\n"
+		"	for (i = 0; i < sample_rate; i++) {\n"
+		"		if (i != gl_SampleID) {\n"
+		"			ivec3 sample_coord = ivec3(gl_FragCoord.x, gl_FragCoord.y, i);\n"
+		"			vec4 sample_color = imageLoad(img_output, sample_coord);\n"
+		"			result.rgb += sample_color.rgb;\n"
+		"		}\n"
+		"	}\n"
+		"	result.rgb /= sample_rate;\n"
+		"	imageStore(img_output, result_coord, result);\n"
+		"	endInvocationInterlockARB();\n"
+		"	col_out = result;\n"
+		"}\n";
+
+	GLuint prog;
+
+	prog = piglit_build_simple_program(vs_text, fs_text);
+	glUseProgram(prog);
+
+	glBindAttribLocation(prog, 0, "pos_in");
+	glBindAttribLocation(prog, 1, "col_in");
+
+	glLinkProgram(prog);
+
+	if (!piglit_check_gl_error(GL_NO_ERROR)) {
+		piglit_report_result(PIGLIT_FAIL);
+	}
+
+	return prog;
+}
+
+static GLuint
+make_texture_buffer(void)
+{
+	GLuint tex;
+
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
+	glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 2,
+		GL_RGBA32F, piglit_width, piglit_height, false);
+	glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
+
+	return tex;
+}
+
+static GLuint
+make_texture_blend(void)
+{
+	GLuint tex;
+
+	glGenTextures(1, &tex);
+	glActiveTexture(GL_TEXTURE0);
+	glBindTexture(GL_TEXTURE_3D, tex);
+	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glBindImageTexture(0, tex, 0, GL_TRUE, 0, GL_READ_WRITE, GL_RGBA32F);
+
+	return tex;
+}
+
+static GLuint
+make_vao(void)
+{
+	static const float pos_col[18][6] = {
+		{ -1.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
+		{  0.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
+		{  0.0,  1.0, 0.0, 1.0, 0.0, 0.25 },
+		{  0.0,  1.0, 0.0, 1.0, 0.0, 0.25 },
+		{ -1.0,  1.0, 0.0, 1.0, 0.0, 0.25 },
+		{ -1.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
+		{ -1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
+		{  1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
+		{  1.0,  1.0, 1.0, 0.0, 0.0, 0.25 },
+		{  1.0,  1.0, 1.0, 0.0, 0.0, 0.25 },
+		{ -1.0,  1.0, 1.0, 0.0, 0.0, 0.25 },
+		{ -1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
+		{ -1.0, -1.0, 0.0, 0.0, 1.0, 0.25 },
+		{  1.0, -1.0, 0.0, 0.0, 1.0, 0.25 },
+		{  1.0,  1.0, 0.0, 0.0, 1.0, 0.25 },
+		{  1.0,  1.0, 0.0, 0.0, 1.0, 0.25 },
+		{ -1.0,  1.0, 0.0, 0.0, 1.0, 0.25 },
+		{ -1.0, -1.0, 0.0, 0.0, 1.0, 0.25 }
+	};
+
+	const int stride = sizeof(pos_col[0]);
+	GLuint vbo, vao;
+
+	glGenVertexArrays(1, &vao);
+	glBindVertexArray(vao);
+
+	glGenBuffers(1, &vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(pos_col), pos_col, GL_STATIC_DRAW);
+
+	glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, stride, (void *) 0);
+	glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, stride,
+		(void *)(sizeof(float) * 2));
+
+	glEnableVertexAttribArray(0);
+	glEnableVertexAttribArray(1);
+
+	if (!piglit_check_gl_error(GL_NO_ERROR)) {
+		piglit_report_result(PIGLIT_FAIL);
+	}
+
+	return vao;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_require_extension("GL_ARB_fragment_shader_interlock");
+
+	glEnable(GL_MULTISAMPLE);
+	glDisable(GL_CULL_FACE);
+	glClearColor(0.0, 0.0, 0.0, 1.0);
+
+	prog = make_shader_program();
+	vao = make_vao();
+	tex_frame = make_texture_buffer();
+	fbo = make_fbo();
+	tex_blend = make_texture_blend();
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	int samples[4] = { 2, 4, 8, 16 };
+	bool pass = true;
+	uint i, j, k, l;
+	uint result1[4] = { 47, 35, 63, 255 };
+	uint result2[4] = { 47, 0, 63, 255 };
+
+	glViewport(0, 0, piglit_width, piglit_height);
+
+	for (i = 0; i < 4; i++) {
+		GLfloat *tex_data = calloc(piglit_width * piglit_height *
+			(samples[i] + 1) * 4, sizeof(GLfloat));
+
+		glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA32F, piglit_width, piglit_height,
+			samples[i] + 1, 0, GL_RGBA, GL_FLOAT, tex_data);
+
+		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
+		glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex_frame);
+		glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, samples[i],
+			GL_RGBA8, piglit_width, piglit_height, false);
+		glUniform1i(1, samples[i]);
+
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT |
+			GL_STENCIL_BUFFER_BIT);
+
+		glUseProgram(prog);
+		glDrawArrays(GL_TRIANGLES, 0, 18);
+
+		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+		glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
+		glDrawBuffer(GL_BACK);
+		glBlitFramebuffer(0, 0, piglit_width, piglit_height, 0, 0, piglit_width,
+			piglit_height, GL_COLOR_BUFFER_BIT, GL_NEAREST);
+		piglit_present_results();
+
+		glGetTexImage(GL_TEXTURE_3D, 0, GL_RGBA, GL_FLOAT, tex_data);
+		for (j = 0; j < samples[i] + 1; j++) {
+			for (k = 0; k < piglit_height; k++) {
+				for (l = 0; l < piglit_width; l++) {
+					uint m = ((piglit_width * piglit_height * j) +
+						(k * piglit_width) + l) * 4;
+					uint r = fabs(tex_data[m]) * 255;
+					uint g = fabs(tex_data[m + 1]) * 255;
+					uint b = fabs(tex_data[m + 2]) * 255;
+					uint a = fabs(tex_data[m + 3]) * 255;
+
+					if ((l < piglit_width / 2) && (r != result1[0] ||
+						  g != result1[1] || b != result1[2] || a != result1[3])) {
+						printf("observed %u %u %u     %u %u %u %u\n", j, k, l, r,
+							g, b, a);
+						printf("expected %u %u %u     %u %u %u %u\n", j, k, l,
+						result1[0], result1[1], result1[2], result1[3]);
+						pass = false;
+						break;
+					}
+
+					if ((l > piglit_width / 2) && (r != result2[0] ||
+						  g != result2[1] || b != result2[2] || a != result2[3])) {
+						printf("observed %u %u %u     %u %u %u %u\n", j, k, l, r,
+							g, b, a);
+						printf("expected %u %u %u     %u %u %u %u\n", j, k, l,
+							result1[0], result1[1], result1[2], result1[3]);
+						pass = false;
+						break;
+					}
+				}
+				if (!pass)
+					break;
+			}
+			if (!pass)
+				break;
+		}
+
+		free(tex_data);
+		pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+		if (!pass)
+			break;
+	}
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
-- 
2.9.3



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