void TransformFeedback::attachImplementationDSA(const GLuint index, Buffer& buffer) {
glTransformFeedbackBufferBase(_id, index, buffer.id());
}
/** @todoc const Containers::ArrayReference makes Doxygen grumpy */
void TransformFeedback::attachImplementationDSA(const GLuint firstIndex, std::initializer_list<Buffer*> buffers) {
for(std::size_t i = 0; i != buffers.size(); ++i)
glTransformFeedbackBufferBase(_id, firstIndex + i, *(buffers.begin() + i) ? (*(buffers.begin() + i))->id() : 0);
}
enum piglit_result
piglit_display(void)
{
GLint max_bind_points = 0;
GLuint q, num_prims;
bool pass = true, test = true;
GLfloat *v, *w;
int i;
/* init the transform feedback buffers */
glGenBuffers(3, xfb_buf);
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf[2]);
piglit_check_gl_error(GL_NO_ERROR);
/* Fetch the number of bind points */
glGetIntegerv(GL_MAX_TRANSFORM_FEEDBACK_BUFFERS, &max_bind_points);
PIGLIT_SUBTEST_ERROR(GL_NO_ERROR, pass, "fetch maximum number of bind "
"points");
if (piglit_khr_no_error)
goto valid_calls;
/* bind a non-existing transform feedback BO */
glTransformFeedbackBufferBase(1337, 0, 0);
PIGLIT_SUBTEST_ERROR(GL_INVALID_OPERATION, pass,
"bind non-existing transform feedback BO");
/* bind a non-existing output BO */
glTransformFeedbackBufferBase(0, 0, 1337);
PIGLIT_SUBTEST_ERROR(GL_INVALID_VALUE, pass, "bind a non-existing "
"output BO");
/* bind to a negative index */
glTransformFeedbackBufferBase(0, -1, xfb_buf[2]);
PIGLIT_SUBTEST_ERROR(GL_INVALID_VALUE, pass, "bind negative index");
/* bind to an index == max */
glTransformFeedbackBufferBase(0, max_bind_points, xfb_buf[2]);
PIGLIT_SUBTEST_ERROR(GL_INVALID_VALUE, pass, "bind to index == "
"max_bind_points (%i)", max_bind_points);
valid_calls:
/* Set up the transform feedback buffer */
for (i = 0; i < 2; i++) {
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf[i]);
glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER,
xfb_buf_size, NULL, GL_STREAM_READ);
glTransformFeedbackBufferBase(0, i, xfb_buf[i]);
piglit_check_gl_error(GL_NO_ERROR);
}
/* Set up the query that checks the # of primitives handled */
glGenQueries(1, &q);
glBeginQuery(GL_PRIMITIVES_GENERATED, q);
piglit_check_gl_error(GL_NO_ERROR);
/* do the transform feedback */
glBeginTransformFeedback(GL_POINTS);
glBindBuffer(GL_ARRAY_BUFFER, input_buf);
glDrawArrays(GL_POINTS, 0, NUM_INPUTS);
glEndTransformFeedback();
glEndQuery(GL_PRIMITIVES_GENERATED);
/* check the number of primitives */
glGetQueryObjectuiv(q, GL_QUERY_RESULT, &num_prims);
glDeleteQueries(1, &q);
printf("%u primitives generated:\n", num_prims);
if (num_prims != NUM_INPUTS) {
printf("Incorrect number of prims generated.\n");
printf("Found %u, expected %u\n", num_prims, NUM_INPUTS);
pass = false;
test = false;
}
/* check the result */
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf[0]);
v = glMapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, GL_READ_ONLY);
piglit_check_gl_error(GL_NO_ERROR);
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf[1]);
w = glMapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, GL_READ_ONLY);
piglit_check_gl_error(GL_NO_ERROR);
for (i = 0; i < num_prims; i++) {
printf("%2d: (%2.0g, %2.0g) : ", i, v[i], w[i]);
if (!equal(v[i], out1_ret[i]) || !equal(w[i], out2_ret[i])) {
printf("NOK, expected (%2.0g, %2.0g)\n",
out1_ret[i], out2_ret[i]);
test = false;
} else
printf("OK\n");
}
PIGLIT_SUBTEST_CONDITION(test, pass, "general test");
piglit_present_results();
/* clean-up everything */
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf[0]);
glUnmapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER);
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf[1]);
glUnmapBuffer(GL_TRANSFORM_FEEDBACK_BUFFER);
glDeleteBuffers(3, xfb_buf);
glDeleteBuffers(1, &input_buf);
glDeleteVertexArrays(1, &vao);
glDeleteProgram(prog);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
