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#include "floormat-main-impl.hpp"
#include "floormat.hpp"
#include "floormat-app.hpp"
#include "compat/assert.hpp"
#include "compat/fpu.hpp"
#include "src/chunk.hpp"
#include "src/world.hpp"
#include "src/camera-offset.hpp"
#include <cstdlib>
//#define FM_SKIP_MSAA
namespace floormat {
floormat_main::floormat_main() noexcept = default;
floormat_main::~floormat_main() noexcept = default;
main_impl::~main_impl() noexcept = default;
static const char* const fm_fake_argv[] = { "floormat", nullptr };
auto main_impl::make_window_flags(const fm_settings& s) -> Configuration::WindowFlags
{
using flag = Configuration::WindowFlag;
Configuration::WindowFlags flags{};
if (s.resizable)
flags |= flag::Resizable;
if (s.fullscreen)
flags |= flag::Fullscreen;
if (s.fullscreen_desktop)
flags |= flag::FullscreenDesktop;
if (s.borderless)
flags |= flag::Borderless;
if (s.maximized)
flags |= flag::Maximized;
return flags;
}
auto main_impl::make_conf(const fm_settings& s) -> Configuration
{
switch (s.log_level)
{
default:
SDL_setenv("MAGNUM_LOG_LEVEL", "normal", 1);
break;
case fm_log_level::quiet:
SDL_setenv("MAGNUM_LOG_LEVEL", "quiet", 1);
break;
case fm_log_level::verbose:
SDL_setenv("MAGNUM_LOG_LEVEL", "verbose", 1);
break;
}
return Configuration{}
.setTitle(s.title)
.setSize(s.resolution)
.setWindowFlags(make_window_flags(s));
}
auto main_impl::make_gl_conf(const fm_settings& s) -> GLConfiguration
{
GLConfiguration::Flags flags{};
using f = GLConfiguration::Flag;
if (s.gpu_debug == fm_gpu_debug::on || s.gpu_debug == fm_gpu_debug::robust)
flags |= f::Debug | f::GpuValidation;
if (s.gpu_debug == fm_gpu_debug::robust)
flags |= f::RobustAccess;
else if (s.gpu_debug == fm_gpu_debug::no_error)
flags |= f::NoError;
}
void main_impl::recalc_viewport(Vector2i size) noexcept
{
GL::defaultFramebuffer.setViewport({{}, size });
#ifdef FM_MSAA
_msaa_framebuffer.detach(GL::Framebuffer::ColorAttachment{0});
_msaa_renderbuffer = Magnum::GL::Renderbuffer{};
_msaa_renderbuffer.setStorageMultisample(s.msaa_samples, GL::RenderbufferFormat::RGBA8, size);
_msaa_framebuffer.setViewport({{}, size });
_msaa_framebuffer.attachRenderbuffer(GL::Framebuffer::ColorAttachment{0}, _msaa_renderbuffer);
#endif
_shader.set_scale(Vector2{size});
app.on_viewport_event(size);
}
// NOLINTNEXTLINE(performance-unnecessary-value-param)
main_impl::main_impl(floormat_app& app, fm_settings s) noexcept :
Platform::Sdl2Application{Arguments{fake_argc, fm_fake_argv},
make_conf(s), make_gl_conf(s)},
app{app}, s{std::move(s)}
{
switch (s.vsync) // NOLINT(bugprone-use-after-move)
{
case fm_tristate::on:
(void)setSwapInterval(1);
if (const auto list = GL::Context::current().extensionStrings();
std::find(list.cbegin(), list.cend(), "EXT_swap_control_tear") != list.cbegin())
(void)setSwapInterval(-1);
break;
case fm_tristate::off:
setSwapInterval(0);
break;
default: break;
}
set_fp_mask();
fm_assert(framebufferSize() == windowSize());
recalc_viewport(windowSize());
timeline.start();
}
global_coords main_impl::pixel_to_tile(Vector2d position) const noexcept
{
constexpr Vector2d pixel_size{dTILE_SIZE[0], dTILE_SIZE[1]};
constexpr Vector2d half{.5, .5};
const Vector2d px = position - Vector2d{windowSize()}*.5 - _shader.camera_offset()*.5;
const Vector2d vec = tile_shader::unproject(px) / pixel_size + half;
const auto x = (std::int32_t)std::floor(vec[0]), y = (std::int32_t)std::floor(vec[1]);
return { x, y };
}
auto main_impl::get_draw_bounds() const noexcept -> draw_bounds
{
using limits = std::numeric_limits<std::int16_t>;
auto x0 = limits::max(), x1 = limits::min(), y0 = limits::max(), y1 = limits::min();
for (const auto win = Vector2d(windowSize());
auto p : {pixel_to_tile(Vector2d{0, 0}).chunk(),
pixel_to_tile(Vector2d{win[0]-1, 0}).chunk(),
pixel_to_tile(Vector2d{0, win[1]-1}).chunk(),
pixel_to_tile(Vector2d{win[0]-1, win[1]-1}).chunk()})
{
x0 = std::min(x0, p.x);
x1 = std::max(x1, p.x);
y0 = std::min(y0, p.y);
y1 = std::max(y1, p.y);
}
return {x0, x1, y0, y1};
}
void main_impl::draw_world() noexcept
{
auto [minx, maxx, miny, maxy] = get_draw_bounds();
for (std::int16_t y = miny; y <= maxy; y++)
for (std::int16_t x = minx; x <= maxx; x++)
{
if (const chunk_coords c = {x, y}; !_world.contains(c))
app.maybe_init_chunk(c, *_world[c]);
const chunk_coords c{x, y};
const with_shifted_camera_offset o{_shader, c};
_floor_mesh.draw(_shader, *_world[c]);
}
for (std::int16_t y = miny; y <= maxy; y++)
for (std::int16_t x = minx; x <= maxx; x++)
{
const chunk_coords c{x, y};
const with_shifted_camera_offset o{_shader, c};
_wall_mesh.draw(_shader, *_world[c]);
}
}
void main_impl::drawEvent()
{
if (const float dt = timeline.previousFrameDuration(); dt > 0)
{
constexpr float RC = 0.1f;
const float alpha = dt/(dt + RC);
_frame_time = _frame_time*(1-alpha) + alpha*dt;
}
else
{
swapBuffers();
timeline.nextFrame();
}
const float dt = std::clamp(timeline.previousFrameDuration(), 1e-6f, 1e-1f);
app.update(dt);
_shader.set_tint({1, 1, 1, 1});
{
GL::defaultFramebuffer.clear(GL::FramebufferClear::Color);
#if defined FM_MSAA && !defined FM_SKIP_MSAA
_msaa_framebuffer.clear(GL::FramebufferClear::Color);
_msaa_framebuffer.bind();
#endif
draw_world();
app.draw_msaa();
#if defined FM_MSAA && !defined FM_SKIP_MSAA
GL::defaultFramebuffer.bind();
GL::Framebuffer::blit(_msaa_framebuffer, GL::defaultFramebuffer, {{}, windowSize()}, GL::FramebufferBlit::Color);
#endif
}
app.draw();
swapBuffers();
redraw();
timeline.nextFrame();
}
void main_impl::quit(int status) { Platform::Sdl2Application::exit(status); }
int main_impl::exec() { return Sdl2Application::exec(); }
struct world& main_impl::world() noexcept { return _world; }
SDL_Window* main_impl::window() noexcept { return Sdl2Application::window(); }
fm_settings& main_impl::settings() noexcept { return s; }
const fm_settings& main_impl::settings() const noexcept { return s; }
Vector2i main_impl::window_size() const noexcept { return windowSize(); }
tile_shader& main_impl::shader() noexcept { return _shader; }
const tile_shader& main_impl::shader() const noexcept { return _shader; }
floormat_main* floormat_main::create(floormat_app& app, const fm_settings& options)
{
auto* ret = new main_impl(app, options);
fm_assert(ret);
return ret;
}
} // namespace floormat
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