GL_ARB_fragment_program/sparse-samplers: Test for a bug in i965.

3 files changed, 156 insertions, 0 deletions

diff --git a/tests/all.tests b/tests/all.tests
index 5a29da7e..911cd611 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -998,6 +998,7 @@ add_plain_test(arb_fragment_program, 'fp-lit-mask')
 add_plain_test(arb_fragment_program, 'fp-lit-src-equals-dst')
 add_plain_test(arb_fragment_program, 'fp-long-alu')
 add_plain_test(arb_fragment_program, 'fp-set-01')
+arb_fragment_program['sparse-samplers'] = concurrent_test('arb_fragment_program-sparse-samplers')
 add_plain_test(arb_fragment_program, 'trinity-fp1')
 arb_fragment_program['incomplete-texture-arb_fp'] = concurrent_test('incomplete-texture -auto arb_fp')
 
diff --git a/tests/spec/arb_fragment_program/CMakeLists.gl.txt b/tests/spec/arb_fragment_program/CMakeLists.gl.txt
index bdcf559e..0b63adac 100644
--- a/tests/spec/arb_fragment_program/CMakeLists.gl.txt
+++ b/tests/spec/arb_fragment_program/CMakeLists.gl.txt
@@ -10,5 +10,6 @@ link_libraries (
 )
 
 piglit_add_executable (arb_fragment_program-minmax minmax.c)
+piglit_add_executable (arb_fragment_program-sparse-samplers sparse-samplers.c)
 
 # vim: ft=cmake:
diff --git a/tests/spec/arb_fragment_program/sparse-samplers.c b/tests/spec/arb_fragment_program/sparse-samplers.c
new file mode 100644
index 00000000..7faf2c94
--- /dev/null
+++ b/tests/spec/arb_fragment_program/sparse-samplers.c
@@ -0,0 +1,154 @@
+/*
+ * 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.
+ */
+
+/**
+ * Tests that sampler behavior works when texture units are not used
+ * contiguously starting from 0.
+ */
+
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 10;
+
+	config.window_width = 400;
+	config.window_height = 100;
+	config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_ALPHA;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static int texrect_w;
+static int texrect_h;
+static const float r[] = {1, 0, 0, 1};
+static const float g[] = {0, 1, 0, 1};
+static const float b[] = {0, 0, 1, 1};
+static const float w[] = {1, 1, 1, 1};
+
+static bool
+test_nearest(int x)
+{
+	return (piglit_probe_rect_rgba(x, 0,
+				       texrect_w, texrect_h, r) &&
+		piglit_probe_rect_rgba(x + texrect_w, 0,
+				       texrect_w, texrect_h, g) &&
+		piglit_probe_rect_rgba(x, texrect_h,
+				       texrect_w, texrect_h, b) &&
+		piglit_probe_rect_rgba(x + texrect_w, texrect_h,
+				       texrect_w, texrect_h, w));
+}
+
+static bool
+test_linear(int x)
+{
+	float average[4];
+	int i;
+
+	/* Figure out what the blended middle pixel of the magnified
+	 * texture ought to be.  Given a default piglit tolerance of
+	 * .02, the texture needs to be at least around 64x64 for this
+	 * to probably work out.
+	 */
+	for (i = 0; i < 4; i++)
+		average[i] = (r[i] + g[i] + b[i] + w[i]) / 4;
+
+	return (piglit_probe_pixel_rgba(x,
+					0,
+					r) &&
+		piglit_probe_pixel_rgba(x + texrect_w * 2 - 1,
+					0,
+					g) &&
+		piglit_probe_pixel_rgba(x,
+					texrect_h * 2 - 1,
+					b) &&
+		piglit_probe_pixel_rgba(x + texrect_w * 2 - 1,
+					texrect_h * 2 - 1,
+					w) &&
+		piglit_probe_pixel_rgba(x + texrect_w,
+					texrect_h, average));
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	static const char *fp_source =
+		"!!ARBfp1.0\n"
+		"TEX result.color, fragment.texcoord[0], texture[1], 2D;\n"
+		"END\n";
+	bool pass = true;
+	GLuint tex;
+	GLuint prog;
+
+	texrect_w = piglit_width / 4 / 2;
+	texrect_h = piglit_height / 2;
+
+	glGenProgramsARB(1, &prog);
+	glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, prog);
+	glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB,
+			   GL_PROGRAM_FORMAT_ASCII_ARB,
+			   strlen(fp_source),
+			   (const GLubyte *) fp_source);
+
+	glEnable(GL_FRAGMENT_PROGRAM_ARB);
+
+	glActiveTexture(GL_TEXTURE1);
+	tex = piglit_rgbw_texture(GL_RGBA, 2, 2, false, false,
+				  GL_UNSIGNED_NORMALIZED);
+
+	/* Given that the failure mode we had that led to this test
+	 * being written was that the sampler state read was
+	 * pseudo-random, go through several statechanges on the
+	 * sampler to make sure we're reliably getting our sampler
+	 * state.
+	 */
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	piglit_draw_rect_tex(-1, -1, 0.5, 2,
+			     0, 0, 1, 1);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	piglit_draw_rect_tex(-0.5, -1, 0.5, 2,
+			     0, 0, 1, 1);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	piglit_draw_rect_tex(0, -1, 0.5, 2,
+			     0, 0, 1, 1);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	piglit_draw_rect_tex(0.5, -1, 0.5, 2,
+			     0, 0, 1, 1);
+
+	pass = pass && test_nearest(piglit_width * 0 / 4);
+	pass = pass && test_linear(piglit_width * 1 / 4);
+	pass = pass && test_nearest(piglit_width * 2 / 4);
+	pass = pass && test_linear(piglit_width * 3 / 4);
+
+	piglit_present_results();
+
+	glDeleteTextures(1, &tex);
+	glDisable(GL_FRAGMENT_PROGRAM_ARB);
+	glDeleteProgramsARB(1, &prog);
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+}