[Piglit] [PATCH 1/3] ext_transform_feedback: test immediate index buffer reuse
Marek Olšák
maraeo at gmail.com
Thu Jan 1 06:17:10 PST 2015
From: Marek Olšák <marek.olsak at amd.com>
---
tests/all.py | 1 +
.../spec/ext_transform_feedback/CMakeLists.gl.txt | 1 +
.../immediate-reuse-index-buffer.c | 141 +++++++++++++++++++++
3 files changed, 143 insertions(+)
create mode 100644 tests/spec/ext_transform_feedback/immediate-reuse-index-buffer.c
diff --git a/tests/all.py b/tests/all.py
index 5faf69f..072cd23 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -3128,6 +3128,7 @@ for mode in ['main_binding', 'indexed_binding', 'buffer_start', 'buffer_size']:
ext_transform_feedback[test_name] = PiglitGLTest(
'ext_transform_feedback-{0}'.format(test_name), run_concurrent=True)
ext_transform_feedback['immediate-reuse'] = PiglitGLTest('ext_transform_feedback-immediate-reuse', run_concurrent=True)
+ext_transform_feedback['immediate-reuse-index-buffer'] = PiglitGLTest('ext_transform_feedback-immediate-reuse-index-buffer', run_concurrent=True)
for mode in ['output', 'prims_generated', 'prims_written']:
for use_gs in ['', ' use_gs']:
test_name = 'intervening-read {0}{1}'.format(mode, use_gs)
diff --git a/tests/spec/ext_transform_feedback/CMakeLists.gl.txt b/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
index 3019e55..b9ea32a 100644
--- a/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
+++ b/tests/spec/ext_transform_feedback/CMakeLists.gl.txt
@@ -26,6 +26,7 @@ piglit_add_executable (ext_transform_feedback-get-buffer-state get-buffer-state.
piglit_add_executable (ext_transform_feedback-position position.c)
piglit_add_executable (ext_transform_feedback-points points.c)
piglit_add_executable (ext_transform_feedback-immediate-reuse immediate-reuse.c)
+piglit_add_executable (ext_transform_feedback-immediate-reuse-index-buffer immediate-reuse-index-buffer.c)
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)
diff --git a/tests/spec/ext_transform_feedback/immediate-reuse-index-buffer.c b/tests/spec/ext_transform_feedback/immediate-reuse-index-buffer.c
new file mode 100644
index 0000000..cb043ae
--- /dev/null
+++ b/tests/spec/ext_transform_feedback/immediate-reuse-index-buffer.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ * Copyright © 2014 Advanced Micro Devices, 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 immediate-reuse-index-buffer.c
+ *
+ * Verify that if a transform feedback output buffer is immediately re-used
+ * as an index buffer (changing no GL settings except for buffer bindings),
+ * rendering is correct.
+ *
+ * The test operates by using an index buffer <-> transform feedback loop
+ * that increments the vertex index (gl_VertexID). The test starts
+ * with index 0 and transform feedback writes (gl_VertexID+1). Then it uses
+ * the output as an input again and the index (gl_VertexID) should be 1.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+ config.supports_gl_compat_version = 10;
+
+ config.window_width = 256;
+ config.window_height = 16;
+ config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static const char *vstext =
+ "#version 130\n"
+ "varying vec4 out_color;\n"
+ "varying int index;\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " int x = 8 + 16 * gl_VertexID;\n"
+ " gl_Position = vec4(x / 128.0 - 1.0, 0, 0, 1);\n"
+ " out_color = vec4(float(gl_VertexID) / 16.0, \n"
+ " float(16 - gl_VertexID) / 16.0, \n"
+ " float(gl_VertexID) / 16.0, 1.0);\n"
+ " index = gl_VertexID + 1;\n"
+ "}\n";
+
+static const char *fstext =
+ "#version 130\n"
+ "varying vec4 out_color;\n"
+ "\n"
+ "void main()\n"
+ "{\n"
+ " gl_FragColor = out_color;\n"
+ "}\n";
+
+static const char *varyings[] = { "index" };
+
+static GLuint bufs[2];
+static GLuint prog;
+
+void
+piglit_init(int argc, char **argv)
+{
+ GLuint vs, fs;
+
+ piglit_require_gl_version(30);
+
+ vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vstext);
+ fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fstext);
+ prog = glCreateProgram();
+ glAttachShader(prog, vs);
+ glAttachShader(prog, fs);
+ glTransformFeedbackVaryings(prog, 1, varyings, GL_INTERLEAVED_ATTRIBS);
+ glLinkProgram(prog);
+ if (!piglit_link_check_status(prog)) {
+ glDeleteProgram(prog);
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ glGenBuffers(2, bufs);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ int i;
+ GLboolean pass = GL_TRUE;
+ unsigned zero = 0;
+
+ /* Setup program and initial buffer contents */
+ glBindBuffer(GL_ARRAY_BUFFER, bufs[0]);
+ glBufferData(GL_ARRAY_BUFFER, 4, &zero, GL_STREAM_COPY);
+ glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, bufs[1]);
+ glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER, 4, &zero, GL_STREAM_COPY);
+
+ glUseProgram(prog);
+ glClear(GL_COLOR_BUFFER_BIT);
+ glPointSize(16);
+
+ /* Draw 16 times, swapping transform feedback and index data
+ * so that transform feedback output is fed back to index
+ * input.
+ */
+ for (i = 0; i < 16; ++i) {
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bufs[i % 2]);
+ glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0,
+ bufs[(i + 1) % 2]);
+ glBeginTransformFeedback(GL_POINTS);
+ glDrawElements(GL_POINTS, 1, GL_UNSIGNED_INT, NULL);
+ glEndTransformFeedback();
+ }
+
+ /* Check that the proper gradient was drawn */
+ for (i = 0; i < 16; ++i) {
+ float expected_color[3] = {i/16.0, (16 - i)/16.0, i/16.0 };
+ pass = piglit_probe_rect_rgb(16 * i, 0, 16, 16,
+ expected_color) && pass;
+ }
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
2.1.0
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