[Piglit] [PATCH 3/6] arb_gpu_shader5: add interpolateAtSample test

Chris Forbes chrisf at ijw.co.nz
Sat Dec 6 18:04:38 PST 2014


Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
---
 tests/all.py                                     |   1 +
 tests/spec/arb_gpu_shader5/CMakeLists.gl.txt     |   1 +
 tests/spec/arb_gpu_shader5/interpolateAtSample.c | 182 +++++++++++++++++++++++
 3 files changed, 184 insertions(+)
 create mode 100644 tests/spec/arb_gpu_shader5/interpolateAtSample.c

diff --git a/tests/all.py b/tests/all.py
index 07e64fa..3746d6e 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -1939,6 +1939,7 @@ add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-xfb-streams-without-invoca
 add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-emitstreamvertex_nodraw')
 add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtCentroid')
 add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtCentroid-packing')
+add_concurrent_test(arb_gpu_shader5, 'arb_gpu_shader5-interpolateAtSample')
 
 arb_shader_subroutine = {}
 spec['ARB_shader_subroutine'] = arb_shader_subroutine
diff --git a/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt b/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt
index a0058bb..4a69620 100644
--- a/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt
+++ b/tests/spec/arb_gpu_shader5/CMakeLists.gl.txt
@@ -12,3 +12,4 @@ link_libraries (
 piglit_add_executable (arb_gpu_shader5-minmax minmax.c)
 piglit_add_executable (arb_gpu_shader5-interpolateAtCentroid interpolateAtCentroid.c)
 piglit_add_executable (arb_gpu_shader5-interpolateAtCentroid-packing interpolateAtCentroid-packing.c)
+piglit_add_executable (arb_gpu_shader5-interpolateAtSample interpolateAtSample.c)
diff --git a/tests/spec/arb_gpu_shader5/interpolateAtSample.c b/tests/spec/arb_gpu_shader5/interpolateAtSample.c
new file mode 100644
index 0000000..bd79066
--- /dev/null
+++ b/tests/spec/arb_gpu_shader5/interpolateAtSample.c
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 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 interpolateAtSample.c
+ *
+ * Test ARB_gpu_shader5 interpolateAtSample builtin
+ *
+ * Tests that interpolateAtSample(x) gives the correct result.
+ *
+ * R, 1-G channels are interesting; a correct implementation should produce
+ * (0,1,0) in all pixels.
+ *
+ * We require 3.2, so the following assumptions are made:
+ * - MAX_SAMPLES >= 4 (although we dont require exactly 4 samples; if only an
+ *   8x mode is supported, the test should still work)
+ * - GLSL 1.50 and Multisample textures are supported.
+ */
+
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_core_version = 32;
+
+	config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+GLuint ms_fbo, vao, bo;
+GLint draw_prog, test_prog;
+GLint sample_pos_loc;
+
+float green[] = { 0, 1, 0 };
+float verts[][2] = { { -1, -1 }, { 1, -1 }, { -1, 1 }, { 1, 1 }, };
+#define GAIN "5"			/* multiplier for absolute difference; make the error more visible. */
+
+
+enum piglit_result
+piglit_display(void)
+{
+	bool pass = true;
+	GLfloat pos[2];
+	glGetMultisamplefv(GL_SAMPLE_POSITION, 0, pos);
+	/* API gives us 0..1 sample position; get it into
+	 * -0.5..0.5 space.
+	 */
+	pos[0] -= 0.5f;
+	pos[1] -= 0.5f;
+
+	glViewport(0, 0, 64, 64);
+
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ms_fbo);
+	glUseProgram(draw_prog);
+	glUniform2fv(sample_pos_loc, 1, pos);
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
+	glUseProgram(test_prog);
+	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+	pass = piglit_probe_rect_rgb(0, 0, 64, 64, green) && pass;
+
+	piglit_present_results();
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+
+void
+piglit_init(int argc, char**argv)
+{
+	GLuint tex;
+	piglit_require_extension("GL_ARB_gpu_shader5");
+
+	glGenFramebuffers(1, &ms_fbo);
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ms_fbo);
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
+	glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 4,
+				GL_RGBA, 64, 64, GL_TRUE);
+	glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+			       GL_TEXTURE_2D_MULTISAMPLE, tex, 0);
+
+	if (!piglit_check_gl_error(GL_NO_ERROR)) {
+		printf("fbo setup failed.\n");
+		piglit_report_result(PIGLIT_SKIP);
+	}
+
+	/* Test quantity varies from -1 to +1 over 64 pixels --
+	 * so moving 1px changes its value by 1/32.
+	 */
+	draw_prog = piglit_build_simple_program(
+		"#version 150\n"
+		"uniform vec2 sample_pos;\n"
+		"in vec2 p;\n"
+		"out vec2 test;\n"
+		"out vec2 ref;\n"
+		"void main() {\n"
+		"	gl_Position = vec4(p, 0, 1);\n"
+		"	test = p;\n"
+		"	ref = p;\n"
+		"	ref.xy += sample_pos / 32;\n"
+		"}\n",
+
+		"#version 150\n"
+		"#extension GL_ARB_gpu_shader5: require\n"
+		"const int sample_id = 0;\n"
+		"in vec2 test;\n"
+		"in vec2 ref;\n"
+		"void main() {\n"
+		"	gl_FragColor = vec4(" GAIN " * abs(\n"
+		"		interpolateAtSample(test, sample_id) - ref), 0, 1);\n"
+		"}\n");
+	if (!draw_prog) {
+		printf("draw_prog compile/link failed\n");
+		piglit_report_result(PIGLIT_FAIL);
+	}
+
+	test_prog = piglit_build_simple_program(
+		"#version 150\n"
+		"in vec2 p;\n"
+		"void main() {\n"
+		"	gl_Position = vec4(p, 0, 1);\n"
+		"}\n",
+
+		"#version 150\n"
+		"uniform sampler2DMS s;\n"
+		"void main() {\n"
+		"	vec4 temp = \n"
+		"		texelFetch(s, ivec2(gl_FragCoord.xy), 0) +\n"
+		"		texelFetch(s, ivec2(gl_FragCoord.xy), 1) +\n"
+		"		texelFetch(s, ivec2(gl_FragCoord.xy), 2) +\n"
+		"		texelFetch(s, ivec2(gl_FragCoord.xy), 3);\n"
+		"	gl_FragColor = vec4(temp.x, 1-temp.y, temp.z, temp.w);\n"
+		"}\n");
+	if (!test_prog) {
+		printf("test_prog compile/link failed\n");
+		piglit_report_result(PIGLIT_FAIL);
+	}
+
+	sample_pos_loc = glGetUniformLocation(draw_prog, "sample_pos");
+
+	glUseProgram(test_prog);
+	glUniform1i(glGetUniformLocation(test_prog, "s"), 0);
+
+	if (!piglit_check_gl_error(GL_NO_ERROR)) {
+		printf("shader setup failed\n");
+		piglit_report_result(PIGLIT_SKIP);
+	}
+
+	glGenVertexArrays(1, &vao);
+	glBindVertexArray(vao);
+	
+	glEnableVertexAttribArray(0);
+	glGenBuffers(1, &bo);
+	glBindBuffer(GL_ARRAY_BUFFER, bo);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
+	glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, (GLvoid const *)0);
+}
+
-- 
2.1.3



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