[Piglit] [PATCH] Test that transform feedback works with non-flat integers.
Paul Berry
stereotype441 at gmail.com
Sat Apr 6 19:45:47 PDT 2013
Commit 0fac0a6 (Modify tests for error checking on "flat" keyword to
match updated specs) adopted the GLSL 1.50 rules for "flat" varyings
for all desktop GL tests (the rationale was that this change likely
reflects a bug fix rather than a deliberate behavioural difference).
The GLSL 1.50 rules allow a vertex shader output to be a non-flat
integer provided that it isn't consumed by the fragment shader. In
particular, this means that a non-flat integer may be used with
transform feedback.
This test verifies that transform feedback works correctly for all
integral types, even if they are not declared as "flat".
---
tests/all.tests | 1 +
.../spec/ext_transform_feedback/CMakeLists.gl.txt | 1 +
.../spec/ext_transform_feedback/nonflat-integral.c | 137 +++++++++++++++++++++
3 files changed, 139 insertions(+)
create mode 100644 tests/spec/ext_transform_feedback/nonflat-integral.c
diff --git a/tests/all.tests b/tests/all.tests
index fbf6bd2..8d067be 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -1944,6 +1944,7 @@ for mode in ['output', 'prims_generated', 'prims_written']:
ext_transform_feedback[test_name] = concurrent_test(
'ext_transform_feedback-{0}'.format(test_name))
ext_transform_feedback['max-varyings'] = concurrent_test('ext_transform_feedback-max-varyings')
+ext_transform_feedback['nonflat-integral'] = concurrent_test('ext_transform_feedback-nonflat-integral')
ext_transform_feedback['overflow-edge-cases'] = concurrent_test('ext_transform_feedback-overflow-edge-cases')
ext_transform_feedback['position-readback-bufferbase'] = concurrent_test('ext_transform_feedback-position')
ext_transform_feedback['position-readback-bufferbase-discard'] = concurrent_test('ext_transform_feedback-position discard')
diff --git a/tests/spec/ext_transform_feedback/CMakeLists.gl.txt b/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
index bf1da03..e881033 100644
--- a/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
+++ b/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
@@ -28,6 +28,7 @@ piglit_add_executable (ext_transform_feedback-interleaved interleaved.c)
piglit_add_executable (ext_transform_feedback-intervening-read intervening-read.c)
piglit_add_executable (ext_transform_feedback-max-varyings max-varyings.c)
piglit_add_executable (ext_transform_feedback-negative-prims negative-prims.c)
+piglit_add_executable (ext_transform_feedback-nonflat-integral nonflat-integral.c)
piglit_add_executable (ext_transform_feedback-primgen primgen.c)
piglit_add_executable (ext_transform_feedback-separate separate.c)
piglit_add_executable (ext_transform_feedback-output-type output-type.c)
diff --git a/tests/spec/ext_transform_feedback/nonflat-integral.c b/tests/spec/ext_transform_feedback/nonflat-integral.c
new file mode 100644
index 0000000..3e1c338
--- /dev/null
+++ b/tests/spec/ext_transform_feedback/nonflat-integral.c
@@ -0,0 +1,137 @@
+/*
+ * 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.
+ */
+
+/**
+ * \file nonflat-interal.c
+ *
+ * Test that non-flat integral vertex shader outputs can be captured
+ * with transform feedback.
+ */
+
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+ config.supports_gl_compat_version = 30;
+ config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB |
+ PIGLIT_GL_VISUAL_ALPHA;
+PIGLIT_GL_TEST_CONFIG_END
+
+
+static const char vs_text[] =
+ "#version 130\n"
+ "out int out_int;\n"
+ "out ivec2 out_ivec2;\n"
+ "out ivec3 out_ivec3;\n"
+ "out ivec4 out_ivec4;\n"
+ "out uint out_uint;\n"
+ "out uvec2 out_uvec2;\n"
+ "out uvec3 out_uvec3;\n"
+ "out uvec4 out_uvec4;\n"
+ "void main()\n"
+ "{\n"
+ " gl_Position = vec4(0.0);\n"
+ " out_int = 11;\n"
+ " out_ivec2 = ivec2(21, 22);\n"
+ " out_ivec3 = ivec3(31, 32, 33);\n"
+ " out_ivec4 = ivec4(41, 42, 43, 44);\n"
+ " out_uint = 51u;\n"
+ " out_uvec2 = uvec2(61u, 62u);\n"
+ " out_uvec3 = uvec3(71u, 72u, 73u);\n"
+ " out_uvec4 = uvec4(81u, 82u, 83u, 84u);\n"
+ "}\n";
+
+
+static const GLchar *varyings[] = {
+ "out_int", "out_ivec2", "out_ivec3", "out_ivec4",
+ "out_uint", "out_uvec2", "out_uvec3", "out_uvec4"
+};
+
+
+static const GLint expected_xfb_result[] = {
+ 11, 21, 22, 31, 32, 33, 41, 42, 43, 44,
+ 51, 61, 62, 71, 72, 73, 81, 82, 83, 84
+};
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ bool pass = true;
+ const GLint *readback;
+ GLuint buf;
+ void *initial_data;
+ int i;
+ GLuint prog = glCreateProgram();
+ GLuint vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
+ glAttachShader(prog, vs);
+ glDeleteShader(vs);
+ glTransformFeedbackVaryings(prog, ARRAY_SIZE(varyings), varyings,
+ GL_INTERLEAVED_ATTRIBS);
+ glLinkProgram(prog);
+ if (!piglit_link_check_status(prog) ||
+ !piglit_check_gl_error(GL_NO_ERROR)) {
+ piglit_report_result(PIGLIT_FAIL);
+ }
+ glUseProgram(prog);
+
+ /* Create transform feedback buffer and pre-load it with
+ * garbage.
+ */
+ glGenBuffers(1, &buf);
+ initial_data = malloc(sizeof(expected_xfb_result));
+ memset(initial_data, 0xcc, sizeof(expected_xfb_result));
+ glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, buf);
+ glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER, sizeof(expected_xfb_result),
+ initial_data, GL_STREAM_READ);
+ free(initial_data);
+
+ /* Run the test */
+ glEnable(GL_RASTERIZER_DISCARD);
+ glBeginTransformFeedback(GL_POINTS);
+ glDrawArrays(GL_POINTS, 0, 1);
+ glEndTransformFeedback();
+
+ /* Check output */
+ readback = glMapBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER, 0,
+ sizeof(expected_xfb_result),
+ GL_MAP_READ_BIT);
+ for (i = 0; i < ARRAY_SIZE(expected_xfb_result); i++) {
+ if (readback[i] != expected_xfb_result[i]) {
+ printf("XFB[%i] == %i, expected %i\n", i, readback[i],
+ expected_xfb_result[i]);
+ pass = false;
+ }
+ }
+ glUnmapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER);
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+ piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
+}
+
+
+enum piglit_result
+piglit_display(void)
+{
+ /* Should never be reached */
+ return PIGLIT_FAIL;
+}
--
1.8.2
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