depth-level-clamp: Test for a miptree relayout failure in the 965 driver.

This test may be obsoleted later if we stop relayouting due to
baselevel, but for now this shows off a failure in the relayout code
when doing a fallback blit.

3 files changed, 166 insertions, 0 deletions

diff --git a/tests/all.tests b/tests/all.tests
index 6112d415f..f485085ea 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -258,6 +258,7 @@ texturing = Group()
 add_plain_test(texturing, 'array-texture')
 add_plain_test(texturing, 'copytexsubimage')
 add_plain_test(texturing, 'cubemap')
+add_plain_test(texturing, 'depth-level-clamp')
 add_plain_test(texturing, 'gen-teximage')
 add_plain_test(texturing, 'gen-compressed-teximage')
 add_plain_test(texturing, 'gen-nonzero-unit')
diff --git a/tests/texturing/CMakeLists.txt b/tests/texturing/CMakeLists.txt
index f6919a6af..86d4e5149 100644
--- a/tests/texturing/CMakeLists.txt
+++ b/tests/texturing/CMakeLists.txt
@@ -22,6 +22,7 @@ link_libraries (
 add_executable (array-texture array-texture.c)
 add_executable (copytexsubimage copytexsubimage.c)
 add_executable (cubemap cubemap.c)
+add_executable (depth-level-clamp depth-level-clamp.c)
 add_executable (gen-compressed-teximage gen-compressed-teximage.c)
 add_executable (gen-nonzero-unit gen-nonzero-unit.c)
 add_executable (gen-teximage gen-teximage.c)
diff --git a/tests/texturing/depth-level-clamp.c b/tests/texturing/depth-level-clamp.c
new file mode 100644
index 000000000..a7c1009f3
--- /dev/null
+++ b/tests/texturing/depth-level-clamp.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright © 2010 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.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+/**
+ * @file depth-level-clamp.c
+ *
+ * Tests that glTexImage2D()ing in the mipmap levels of a depth texture and then
+ * rendering with them with various clamping works correctly.
+ *
+ * This test is designed to catch a failure in the 965 driver's depth
+ * miptree copying for relayout that occurs due to the clamping.
+ */
+
+#include "piglit-util.h"
+
+#define MAX_SIZE	64
+#define MAX_LOD	6
+#define PAD		5
+
+int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB;
+int piglit_width = (MAX_SIZE * 2 + PAD * 3);
+int piglit_height = (MAX_SIZE * MAX_LOD + PAD * (MAX_LOD + 1));
+
+static void
+set_level_value(int level, int size, float val)
+{
+	GLfloat *tex;
+	int x, y;
+
+	tex = malloc(size * size * sizeof(GLfloat));
+
+	for (y = 0; y < size; y++) {
+		for (x = 0; x < size; x++) {
+			tex[(y * size + x)] = val;
+		}
+	}
+
+	glTexImage2D(GL_TEXTURE_2D, level, GL_DEPTH_COMPONENT,
+		     size, size, 0,
+		     GL_DEPTH_COMPONENT, GL_FLOAT, tex);
+
+	free(tex);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	int dim;
+	GLboolean pass = GL_TRUE;
+	int level, x, y;
+	GLuint tex;
+	float val;
+
+	piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
+
+	/* Clear background to gray */
+	glClearColor(0.0, 0.7, 0.0, 1.0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	/* Create the texture. */
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_2D, tex);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+			GL_LINEAR_MIPMAP_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+	/* Fill in each level */
+	val = 1.0;
+	for (level = 0, dim = MAX_SIZE; dim > 0; level++, dim /= 2) {
+		set_level_value(level, dim, val);
+		val -= 1.0 / MAX_LOD;
+	}
+
+	glEnable(GL_TEXTURE_2D);
+
+	/* Draw areas of the base level size with clamping to the
+	 * minimum mip lod of each texture level.
+	 */
+	x = PAD;
+	y = PAD;
+	for (level = 0, dim = MAX_SIZE; dim > 1; level++, dim /= 2) {
+		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, level);
+		piglit_draw_rect_tex(x, y, MAX_SIZE, MAX_SIZE,
+				     0.0, 0.0, 1.0, 1.0);
+		y += MAX_SIZE + PAD;
+	}
+
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, 0.0);
+
+	/* Draw areas of the base level size with level clamping to
+	 * each texture level.
+	 */
+	x = PAD + MAX_SIZE + PAD;
+	y = PAD;
+	for (level = 0, dim = MAX_SIZE; dim > 1; level++, dim /= 2) {
+		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, level);
+		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, level);
+		piglit_draw_rect_tex(x, y, MAX_SIZE, MAX_SIZE,
+				     0.0, 0.0, 1.0, 1.0);
+		y += MAX_SIZE + PAD;
+	}
+
+	/* Verify that the resulting images are blended between the levels. */
+	x = PAD;
+	y = PAD;
+	val = 1.0;
+	for (level = 0, dim = MAX_SIZE; dim > 1; level++, dim /= 2) {
+		float expected[3];
+		int i;
+
+		for (i = 0; i < 3; i++)
+			expected[i] = val;
+
+		pass = piglit_probe_pixel_rgb(x + MAX_SIZE / 2,
+					      y + MAX_SIZE / 2,
+					      expected) && pass;
+
+		pass = piglit_probe_pixel_rgb(x + MAX_SIZE + PAD + MAX_SIZE / 2,
+					      y + MAX_SIZE / 2,
+					      expected) && pass;
+
+		y += MAX_SIZE + PAD;
+		val -= 1.0 / MAX_LOD;
+	}
+
+	glDeleteTextures(1, &tex);
+
+	glutSwapBuffers();
+
+	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	piglit_require_extension("GL_ARB_depth_texture");
+}