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#include <cstdio>
#include <algorithm>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include "kms++.h"
#include "test.h"
using namespace std;
using namespace kms;
static void main_loop(Card& card);
class OutputFlipHandler
{
public:
OutputFlipHandler(Connector* conn, Crtc* crtc, DumbFramebuffer* fb1, DumbFramebuffer* fb2)
: m_connector(conn), m_crtc(crtc), m_fbs { fb1, fb2 }, m_front_buf(1), m_bar_xpos(0)
{
}
~OutputFlipHandler()
{
delete m_fbs[0];
delete m_fbs[1];
}
OutputFlipHandler(const OutputFlipHandler& other) = delete;
OutputFlipHandler& operator=(const OutputFlipHandler& other) = delete;
void set_mode()
{
auto mode = m_connector->get_default_mode();
int r = m_crtc->set_mode(m_connector, *m_fbs[0], mode);
ASSERT(r == 0);
}
void handle_event()
{
m_front_buf = (m_front_buf + 1) % 2;
const int bar_width = 20;
const int bar_speed = 8;
auto crtc = m_crtc;
auto fb = m_fbs[(m_front_buf + 1) % 2];
ASSERT(crtc);
ASSERT(fb);
int current_xpos = m_bar_xpos;
int old_xpos = (current_xpos + (fb->width() - bar_width - bar_speed)) % (fb->width() - bar_width);
int new_xpos = (current_xpos + bar_speed) % (fb->width() - bar_width);
draw_color_bar(*fb, old_xpos, new_xpos, bar_width);
m_bar_xpos = new_xpos;
auto& card = crtc->card();
if (card.has_atomic()) {
int r;
AtomicReq ctx(card);
ctx.add(m_crtc, card.get_prop("FB_ID"), fb->id());
r = ctx.test();
ASSERT(r == 0);
r = ctx.commit(this);
ASSERT(r == 0);
} else {
int r = crtc->page_flip(*fb, this);
ASSERT(r == 0);
}
}
private:
Connector* m_connector;
Crtc* m_crtc;
DumbFramebuffer* m_fbs[2];
int m_front_buf;
int m_bar_xpos;
};
int main()
{
Card card;
if (card.master() == false)
printf("Not DRM master, modeset may fail\n");
//card.print_short();
vector<OutputFlipHandler*> outputs;
for (auto pipe : card.get_connected_pipelines())
{
auto conn = pipe.connector;
auto crtc = pipe.crtc;
auto mode = conn->get_default_mode();
auto fb1 = new DumbFramebuffer(card, mode.hdisplay, mode.vdisplay, "XR24");
auto fb2 = new DumbFramebuffer(card, mode.hdisplay, mode.vdisplay, "XR24");
printf("conn %u, crtc %u, fb1 %u, fb2 %u\n", conn->id(), crtc->id(), fb1->id(), fb2->id());
auto output = new OutputFlipHandler(conn, crtc, fb1, fb2);
outputs.push_back(output);
}
for(auto out : outputs)
out->set_mode();
for(auto out : outputs)
out->handle_event();
main_loop(card);
for(auto out : outputs)
delete out;
}
static void page_flip_handler(int fd, unsigned int frame,
unsigned int sec, unsigned int usec,
void *data)
{
//printf("flip event %d, %d, %u, %u, %p\n", fd, frame, sec, usec, data);
auto out = (OutputFlipHandler*)data;
out->handle_event();
}
static void main_loop(Card& card)
{
drmEventContext ev = {
.version = DRM_EVENT_CONTEXT_VERSION,
.vblank_handler = 0,
.page_flip_handler = page_flip_handler,
};
fd_set fds;
FD_ZERO(&fds);
int fd = card.fd();
printf("press enter to exit\n");
while (true) {
int r;
FD_SET(0, &fds);
FD_SET(fd, &fds);
r = select(fd + 1, &fds, NULL, NULL, NULL);
if (r < 0) {
fprintf(stderr, "select() failed with %d: %m\n", errno);
break;
} else if (FD_ISSET(0, &fds)) {
fprintf(stderr, "exit due to user-input\n");
break;
} else if (FD_ISSET(fd, &fds)) {
drmHandleEvent(fd, &ev);
}
}
}
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