From: Roland Scheidegger<srol...@vmware.com>
This is pretty rough and doesn't really test all that much (just
textureOffsetLod, but there's other texturing functions with offsets),
doesn't test different wrap modes, NPOT sizes etc., but there's no
other test using "ordinary" texture opcodes and texel offsets, so
it's a start (and in fact it exposed a bug in the mesa state tracker).
Tested with llvmpipe (pass) and softpipe (fail) which is as expected -
hopefully the math is ok...
Inspired from fs-texelFetchOffset.
---
tests/spec/glsl-1.30/execution/CMakeLists.gl.txt | 1 +
.../spec/glsl-1.30/execution/fs-textureOffset-2D.c | 158
++++++++++++++++++++
2 files changed, 159 insertions(+)
create mode 100644 tests/spec/glsl-1.30/execution/fs-textureOffset-2D.c
diff --git a/tests/spec/glsl-1.30/execution/CMakeLists.gl.txt
b/tests/spec/glsl-1.30/execution/CMakeLists.gl.txt
index 6737bb1..3c0b2d5 100644
--- a/tests/spec/glsl-1.30/execution/CMakeLists.gl.txt
+++ b/tests/spec/glsl-1.30/execution/CMakeLists.gl.txt
@@ -13,6 +13,7 @@ link_libraries (
piglit_add_executable (fs-discard-exit-2 fs-discard-exit-2.c)
piglit_add_executable (fs-texelFetch-2D fs-texelFetch-2D.c)
piglit_add_executable (fs-texelFetchOffset-2D fs-texelFetchOffset-2D.c)
+piglit_add_executable (fs-textureOffset-2D fs-textureOffset-2D.c)
IF (NOT MSVC)
piglit_add_executable (isinf-and-isnan isinf-and-isnan.c)
ENDIF (NOT MSVC)
diff --git a/tests/spec/glsl-1.30/execution/fs-textureOffset-2D.c
b/tests/spec/glsl-1.30/execution/fs-textureOffset-2D.c
new file mode 100644
index 0000000..4c050fb
--- /dev/null
+++ b/tests/spec/glsl-1.30/execution/fs-textureOffset-2D.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2013 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 fs-textureOffset-2D.c
+ *
+ * Tests the built-in function textureLodOffset() in the fragment
shader.
+ *
+ * Creates a mipmapped 64x32 2D texture and draws a series of squares
whose
+ * color contains a texel fetched from each quadrant of the rgbw
texture.
+ *
+ * Author: Roland Scheidegger
+ */
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 10;
+
+ config.window_width = 90;
+ config.window_height = 150;
