[Piglit] [PATCH] arb_clear_texture-clear-max-level: exercise an nvidia ARB_clear_texture bug

[Brian Paul]

---
 tests/all.py                                   |   1 +
 tests/spec/arb_clear_texture/CMakeLists.gl.txt |   1 +
 tests/spec/arb_clear_texture/clear-max-level.c | 130 +++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 tests/spec/arb_clear_texture/clear-max-level.c

diff --git a/tests/all.py b/tests/all.py
index ad5741d..d5431a8 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -3578,6 +3578,7 @@ with profile.group_manager(
 with profile.group_manager(
         PiglitGLTest,
         grouptools.join('spec', 'arb_clear_texture')) as g:
+    g(['arb_clear_texture-clear-max-level'])
     g(['arb_clear_texture-simple'])
     g(['arb_clear_texture-error'])
     g(['arb_clear_texture-3d'])
diff --git a/tests/spec/arb_clear_texture/CMakeLists.gl.txt b/tests/spec/arb_clear_texture/CMakeLists.gl.txt
index 726d5d8..722f5e6 100644
--- a/tests/spec/arb_clear_texture/CMakeLists.gl.txt
+++ b/tests/spec/arb_clear_texture/CMakeLists.gl.txt
@@ -8,6 +8,7 @@ link_libraries (
 	${OPENGL_gl_LIBRARY}
 )
 
+piglit_add_executable (arb_clear_texture-clear-max-level clear-max-level.c)
 piglit_add_executable (arb_clear_texture-simple simple.c)
 piglit_add_executable (arb_clear_texture-error error.c common.c)
 piglit_add_executable (arb_clear_texture-3d 3d.c)
diff --git a/tests/spec/arb_clear_texture/clear-max-level.c b/tests/spec/arb_clear_texture/clear-max-level.c
new file mode 100644
index 0000000..be14898
--- /dev/null
+++ b/tests/spec/arb_clear_texture/clear-max-level.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2015 VMware, Inc.
+ *
+ * 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 clear-max-level.c
+ *
+ * Exercise an nvidia driver bug where clearing a texture mipmap level
+ * fails if the level is >= GL_TEXTURE_MAX_LEVEL.
+ *
+ * BTW, glCopyImageSubData() seems to also fail if the src/dest mipmap level
+ * is >= GL_TEXTURE_MAX_LEVEL.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+	config.supports_gl_compat_version = 14;
+	config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+PIGLIT_GL_TEST_CONFIG_END
+
+
+static bool
+test_clear(GLint maxLevel)
+{
+	const GLenum target = GL_TEXTURE_2D;
+	const int width = 32, height = 32, numLevels = 3;
+	const GLenum texInternalFormat = GL_RGBA8;
+	GLfloat *texData;
+	int i, l;
+	bool pass = true;
+	GLuint tex;
+
+	/* Create texture */
+	glGenTextures(1, &tex);
+	glBindTexture(target, tex);
+	glTexStorage2D(target,
+		       numLevels,
+		       texInternalFormat,
+		       width,
+		       height);
+	if (!piglit_check_gl_error(GL_NO_ERROR))
+		return false;
+
+	glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(target, GL_TEXTURE_BASE_LEVEL, 0);
+	glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevel);
+
+	/* clear levels to unique values */
+	for (l = 0; l < numLevels; ++l) {
+		GLfloat value[4];
+		value[0] = value[1] = value[2] = value[3] = l * 0.125;
+		glClearTexImage(tex, l, GL_RGBA, GL_FLOAT, value);
+		if (!piglit_check_gl_error(GL_NO_ERROR))
+			return false;
+	}
+
+	/* check results */
+	texData = malloc(width * height * 4 * sizeof(GLfloat));
+
+	for (l = 0; l < numLevels; l++) {
+		float expected = l * 0.125;
+		float w = MAX2(1, width >> l);
+		float h = MAX2(1, width >> l);
+		glPixelStorei(GL_PACK_ALIGNMENT, 1);
+		glGetTexImage(target, l, GL_RGBA, GL_FLOAT, texData);
+		if (!piglit_check_gl_error(GL_NO_ERROR))
+			return false;
+		for (i = 0; i < 4 * w * h; i++) {
+			if (texData[i] != expected) {
+				printf("Failure:\n");
+				printf("\tmipmap level %d, pixel %d\n",
+				       l, i / 4);
+				printf("\tGL_TEXTURE_MAX_LEVEL %d\n", maxLevel);
+				printf("\texpected value %g, found %g\n",
+				       expected, texData[i]);
+				pass = false;
+				break;
+			}
+		}
+	}
+
+	free(texData);
+	glDeleteTextures(1, &tex);
+
+	return pass;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+	bool pass = true;
+
+	piglit_require_extension("GL_ARB_texture_storage");
+	piglit_require_extension("GL_ARB_clear_texture");
+
+	pass = test_clear(0) && pass;
+	pass = test_clear(1) && pass;
+	pass = test_clear(2) && pass;
+
+	piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+	/* unused */
+	return PIGLIT_FAIL;
+}
-- 
1.9.1