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/*
* Copyright © 2014 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 xfb-rendezvous_by_location.c
* Verify that transform feedback data lands in the correct place when
* rendezvous-by-location is used.
*
* Use a single vertex shader with outputs with non-contiguous explicit
* locations. Specify transform feedback with the vertex shader outputs
* landing in a different order than the explicit locations specify. Verify
* that the order specified by glTransformFeedbackVaryings is used.
*/
#include "piglit-util-gl.h"
#include "sso-common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 21;
config.supports_gl_core_version = 31;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
static const char *vs_template =
"#version %d\n"
"#extension GL_ARB_separate_shader_objects: require\n"
"#extension GL_ARB_explicit_attrib_location: require\n"
"\n"
"layout(location = 0) in vec4 piglit_vertex;\n"
"\n"
"layout(location = 1) out vec3 a;\n"
"layout(location = 3) out vec3 b;\n"
"\n"
"void main()\n"
"{\n"
" gl_Position = piglit_vertex;\n"
" a = piglit_vertex.xyz;\n"
" b = vec3(3, 5, 7);\n"
"}\n"
;
void piglit_init(int argc, char **argv)
{
unsigned glsl_version;
GLuint vs_prog = 0;
GLuint buf = 0;
GLuint xfb = 0;
GLuint pipe = 0;
char *source;
float *data;
unsigned i;
bool pass = true;
static const char *varyings[] = {"b", "a"};
/* The vertex data is expected in this order because piglit_draw_rect
* uses a GL_TRIANGLE_STRIP to draw the rectangle.
*/
static const float expected_data[6 * 6] = {
3, 5, 7, -1, -1, 0,
3, 5, 7, 1, -1, 0,
3, 5, 7, -1, 1, 0,
3, 5, 7, -1, 1, 0,
3, 5, 7, 1, -1, 0,
3, 5, 7, 1, 1, 0
};
piglit_require_extension("GL_ARB_separate_shader_objects");
piglit_require_extension("GL_ARB_explicit_attrib_location");
piglit_require_extension("GL_ARB_transform_feedback2");
glsl_version = pick_a_glsl_version();
/* The vertex shader must be created using the "traditional" method
* because we the call glTransformFeedbackVaryings before linking.
*/
(void)!asprintf(&source, vs_template, glsl_version);
if (!CreateShaderProgram_with_xfb(source, varyings,
ARRAY_SIZE(varyings), &vs_prog)) {
pass = false;
goto done;
}
glGenProgramPipelines(1, &pipe);
glBindProgramPipeline(pipe);
glUseProgramStages(pipe,
GL_VERTEX_SHADER_BIT,
vs_prog);
configure_transform_feedback_object(&xfb, &buf);
glEnable(GL_RASTERIZER_DISCARD);
/* This will generate 4 vertices worth of transform feedback data.
*/
glBeginTransformFeedback(GL_TRIANGLES);
piglit_draw_rect(-1, -1, 2, 2);
glEndTransformFeedback();
/* Verify that the correct data landed in the correct places.
*/
data = glMapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, GL_READ_ONLY);
for (i = 0; i < 6; i++) {
if (memcmp(&data[i * 6], &expected_data[i * 6],
sizeof(float) * 6) != 0) {
printf("Incorrect XFB data for veretx %d. Got\n", i);
printf(" %f %f %f %f %f %f\n",
data[(i * 6) + 0],
data[(i * 6) + 1],
data[(i * 6) + 2],
data[(i * 6) + 3],
data[(i * 6) + 4],
data[(i * 6) + 5]);
printf("but expected\n");
printf(" %f %f %f %f %f %f\n\n",
expected_data[(i * 6) + 0],
expected_data[(i * 6) + 1],
expected_data[(i * 6) + 2],
expected_data[(i * 6) + 3],
expected_data[(i * 6) + 4],
expected_data[(i * 6) + 5]);
}
}
glUnmapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER);
pass = piglit_check_gl_error(0) && pass;
done:
free(source);
glBindProgramPipeline(0);
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, 0);
glBindTransformFeedback(GL_TRANSFORM_FEEDBACK, 0);
glDeleteBuffers(1, &buf);
glDeleteTransformFeedbacks(1, &xfb);
glDeleteProgramPipelines(1, &pipe);
glDeleteProgram(vs_prog);
pass = piglit_check_gl_error(0) && pass;
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
enum piglit_result
piglit_display(void)
{
return PIGLIT_FAIL;
}
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