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-rw-r--r--tests/spec/ext_transform_feedback/nonflat-integral.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/tests/spec/ext_transform_feedback/nonflat-integral.c b/tests/spec/ext_transform_feedback/nonflat-integral.c
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+++ b/tests/spec/ext_transform_feedback/nonflat-integral.c
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+/*
+ * 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;
+}