void make_screenshot(
eglplus::Surface& surface,
std::unique_ptr<Example>& example,
ExampleClock& clock,
const ExampleOptions& opts
)
{
double s = example->HeatUpTime();
double t = example->ScreenshotTime();
double dt = example->FrameTime();
clock.Update(s);
glEnable(GL_MULTISAMPLE);
// heat-up
while(s < t)
{
s += dt;
clock.Update(s);
unsigned part_no = 0;
double comp = 0.0;
do
{
comp = example->RenderPart(part_no++, clock);
}
while(comp < 1.0);
if(s < t) surface.SwapBuffers();
}
glFinish();
//save it to a file
std::vector<char> pixels(opts.width * opts.height * 3);
glReadPixels(
0, 0,
opts.width,
opts.height,
GL_RGB,
GL_UNSIGNED_BYTE,
pixels.data()
);
std::ofstream output(opts.screenshot_path);
output.write(pixels.data(), pixels.size());
surface.SwapBuffers();
}
void make_screenshot(
eglplus::Surface& surface,
std::unique_ptr<Example>& example,
ExampleClock& clock,
GLuint width,
GLuint height,
const char* screenshot_path
)
{
double s = example->HeatUpTime();
double t = example->ScreenshotTime();
double dt = example->FrameTime();
clock.Update(s);
// heat-up
while(true)
{
s += dt;
clock.Update(s);
example->Render(clock);
if(s < t) surface.SwapBuffers();
else break;
}
glFinish();
//save it to a file
std::vector<char> pixels(width * height * 3);
glReadPixels(
0, 0,
width,
height,
GL_RGB,
GL_UNSIGNED_BYTE,
pixels.data()
);
std::ofstream output(screenshot_path);
output.write(pixels.data(), pixels.size());
surface.SwapBuffers();
}
void run_framedump_loop(
eglplus::Surface& surface,
std::unique_ptr<Example>& example,
ExampleClock& clock,
const ExampleOptions& opts
)
{
std::vector<char> txtbuf(1024);
std::cin.getline(txtbuf.data(), txtbuf.size());
if(std::strcmp(opts.framedump_prefix, txtbuf.data()) != 0) return;
const std::size_t mouse_path_pts = 7;
std::vector<Vec2f> mouse_path_pos(mouse_path_pts);
std::vector<Vec2f> mouse_path_dir(mouse_path_pts);
for(std::size_t p=0; p!= mouse_path_pts; ++p)
{
mouse_path_pos[p] = Vec2f(
std::rand() % opts.width,
std::rand() % opts.height
);
mouse_path_dir[p] = Vec2f(
(std::rand()%2?1.0:-1.0)*10.0f*
(0.2+float(std::rand())/float(RAND_MAX)*0.8),
(std::rand()%2?1.0:-1.0)*10.0f*
(0.2+float(std::rand())/float(RAND_MAX)*0.8)
);
}
typedef CubicBezierLoop<Vec2f, double> Loop;
double t = 0.0;
double period = 1.0 / 25.0;
GLuint frame_no = 0;
std::vector<char> pixels(opts.width * opts.height * 4);
GLuint border = 32;
glEnable(GL_MULTISAMPLE);
while(true)
{
Vec2f mouse_pos = Loop(mouse_path_pos).Position(t*0.2);
for(std::size_t p=0; p!= mouse_path_pts; ++p)
{
Vec2f dir = mouse_path_dir[p];
Vec2f pos = mouse_path_pos[p];
if((pos.x() < border) && (dir.x() < 0.0))
{
dir = Vec2f(-dir.x(), dir.y());
}
if((pos.y() < border) && (dir.y() < 0.0))
{
dir = Vec2f( dir.x(),-dir.y());
}
if((pos.x() > opts.width-border) && (dir.x() > 0.0))
{
dir = Vec2f(-dir.x(), dir.y());
}
if((pos.y() >opts.height-border) && (dir.y() > 0.0))
{
dir = Vec2f( dir.x(),-dir.y());
}
mouse_path_dir[p] = dir;
mouse_path_pos[p] = pos + dir;
}
float mouse_x = mouse_pos.x();
float mouse_y = mouse_pos.y();
if(mouse_x < 0.0f) mouse_x = 0.0f;
if(mouse_y < 0.0f) mouse_y = 0.0f;
if(mouse_x > opts.width) mouse_x = opts.width;
if(mouse_y > opts.height) mouse_y = opts.height;
example->MouseMove(
GLuint(mouse_x),
GLuint(mouse_y),
opts.width,
opts.height
);
t += period;
clock.Update(t);
if(!example->Continue(clock)) break;
unsigned part_no = 0;
double comp = 0.0;
do
{
comp = example->RenderPart(part_no++, clock);
}
while(comp < 1.0);
glFinish();
glReadPixels(
0, 0,
opts.width,
opts.height,
GL_RGBA,
GL_UNSIGNED_BYTE,
pixels.data()
);
glFinish();
surface.SwapBuffers();
std::stringstream filename;
filename <<
opts.framedump_prefix <<
std::setfill('0') << std::setw(6) <<
frame_no << ".rgba";
{
std::ofstream file(filename.str());
file.write(pixels.data(), pixels.size());
file.flush();
}
std::cout << filename.str() << std::endl;
++frame_no;
txtbuf.resize(filename.str().size()+1);
std::cin.getline(txtbuf.data(), txtbuf.size());
if(std::strncmp(
filename.str().c_str(),
txtbuf.data(),
txtbuf.size()
) != 0) break;
}
}