/** @todoc const Containers::ArrayReference makes Doxygen grumpy */
void TransformFeedback::attachImplementationDSA(const GLuint firstIndex, std::initializer_list<std::tuple<Buffer*, GLintptr, GLsizeiptr>> buffers) {
for(std::size_t i = 0; i != buffers.size(); ++i) {
Buffer* buffer;
GLintptr offset;
GLsizeiptr size;
std::tie(buffer, offset, size) = *(buffers.begin() + i);
glTransformFeedbackBufferRange(_id, firstIndex + i, buffer ? buffer->id() : 0, offset, size);
}
}
void TransformFeedback::attachImplementationDSA(const GLuint index, Buffer& buffer, const GLintptr offset, const GLsizeiptr size) {
glTransformFeedbackBufferRange(_id, index, buffer.id(), offset, size);
}
void
piglit_init(int argc, char **argv)
{
static const char *varyings[] = { "valOut1", "valOut2" };
GLuint size, start;
GLint inAttrib;
int i;
/* Check the driver. */
piglit_require_extension("GL_ARB_transform_feedback3");
piglit_require_extension("GL_ARB_direct_state_access");
/* Create shaders. */
prog = piglit_build_simple_program_unlinked(vstext, NULL);
glTransformFeedbackVaryings(prog, 2, varyings,
GL_SEPARATE_ATTRIBS);
glLinkProgram(prog);
if (!piglit_link_check_status(prog)) {
glDeleteProgram(prog);
piglit_report_result(PIGLIT_FAIL);
}
glUseProgram(prog);
/* Set up the Vertex Array Buffer */
glEnable(GL_VERTEX_ARRAY);
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
/* Set up the input data buffer */
glGenBuffers(1, &input_buf);
glBindBuffer(GL_ARRAY_BUFFER, input_buf);
glBufferData(GL_ARRAY_BUFFER, sizeof(inputs), inputs, GL_STATIC_DRAW);
inAttrib = glGetAttribLocation(prog, "valIn");
piglit_check_gl_error(GL_NO_ERROR);
glVertexAttribPointer(inAttrib, 1, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(inAttrib);
/* set the initial state */
ctx.active = false;
ctx.paused = false;
for (i = 0; i < 3; i++) {
ctx.bo_state[i].binding = 0;
ctx.bo_state[i].start = 0;
ctx.bo_state[i].size = 0;
}
check_active_paused_state("initial state");
check_binding_state("initial state");
/* Set up the transform feedback buffer */
glGenBuffers(3, xfb_buf);
for (i = 0; i < 2; i++) {
start = rand() & 0xFC;
size = 0x100 + (rand() & 0xFFC);
glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, xfb_buf[i]);
piglit_check_gl_error(GL_NO_ERROR);
glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER,
size, NULL, GL_STREAM_READ);
piglit_check_gl_error(GL_NO_ERROR);
glTransformFeedbackBufferRange(0, i, xfb_buf[i], start, size);
piglit_check_gl_error(GL_NO_ERROR);
ctx.bo_state[i].binding = xfb_buf[i];
ctx.bo_state[i].start = start;
ctx.bo_state[i].size = size;
}
check_binding_state("post-binding state");
}
