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#include "engine.h"
#include "context.h"
#include "objects/scene.h"
using namespace Mauri;
auto View::center_scale_viewport() -> void
{
Render::set_viewport(this->camera_pos[0], this->camera_pos[1],
this->ortho_width / this->scale, this->ortho_height / this->scale);
}
auto View::center_viewport(f32 buffer_width, f32 buffer_height) -> void
{
Render::set_viewport((this->width - buffer_width) / -2,
(this->height - buffer_height) / -2, buffer_width, buffer_height);
}
auto View::default_viewport(f32 buffer_width, f32 buffer_height) -> void
{
Render::set_viewport(0, 0, buffer_width, buffer_height);
}
auto View::center(f32 buffer_width, f32 buffer_height) -> void
{
f32 w_scale = this->width / buffer_width;
f32 h_scale = this->height / buffer_height;
this->scale = (w_scale <= h_scale) ? w_scale : h_scale;
f32 scaled_width = this->width / this->scale;
f32 scaled_height = this->height / this->scale;
this->camera_pos[0] = ((scaled_width - buffer_width) / -2.f);
this->camera_pos[1] = ((scaled_height - buffer_height) / -2.f);
}
Engine::Engine(Scene *scene, f32 rate, bool audio)
: scene(scene), rate(rate), audio_enabled(audio)
{
this->view.width = scene->width;
this->view.height = scene->height;
this->view.ortho_width = scene->width;
this->view.ortho_height = scene->height;
this->view.texel_size[0] = 1.f / this->view.width;
this->view.texel_size[1] = 1.f / this->view.height;
this->view.texel_half_size[0] = .5f / this->view.width;
this->view.texel_half_size[1] = .5f / this->view.height;
this->view.center(context()->width(), context()->height());
this->view.camera_pos[0] += scene->cam.offset[0];
this->view.camera_pos[1] += scene->cam.offset[1];
// No audio for now.
this->audio_enabled = false;
this->shader = get_shader("hdr_downsample");
this->render_shader = this->shader->compile({});
this->create_framebuffer(COMBINE_BUFFER, this->view.width, this->view.height, 1.f);
this->combine_buffer = this->get_framebuffer(COMBINE_BUFFER);
this->create_framebuffer(MIPMAPPED_BUFFER, this->view.width, this->view.height, 1.f);
this->default_mat = glm::ortho(-1.f, 1.f, -1.f, 1.f, -3.f, 1.f);
this->default_mat = glm::scale(this->default_mat, vec3{1.f, 1.f, 0.001f});
this->default_mat_inverse = glm::inverse(this->default_mat);
this->default_object = new RenderObject(DEFAULT);
this->flipped_object = new RenderObject(DEFAULT_FLIPPED);
this->fullscreen_object = new RenderObject(FULLSCREEN);
}
auto Engine::create_framebuffer(const std::string &name, f32 width, f32 height, f32 scale) -> void
{
this->framebuffers.emplace_back(new Framebuffer(name, width, height, scale));
}
auto Engine::get_framebuffer(const std::string &name) -> Framebuffer *
{
for (Framebuffer *buffer : this->framebuffers)
{
if (buffer->name == name) return buffer;
}
return nullptr;
}
auto Engine::get_framebuffer_texture(const std::string &name) -> Texture *
{
Framebuffer *buffer = this->get_framebuffer(name);
return ((buffer) ? buffer->texture : nullptr);
}
auto Engine::update() -> void
{
this->view.cursor_pos[0] = (f32)context()->pointer_x;
this->view.cursor_pos[1] = (f32)context()->pointer_y;
this->view.cursor_pos[0] -= this->view.camera_pos[0];
this->view.cursor_pos[1] -= this->view.camera_pos[1];
this->view.cursor_pos[0] *= this->view.scale;
this->view.cursor_pos[1] *= this->view.scale;
this->view.cursor_pos[1] = this->view.height - this->view.cursor_pos[1];
}
auto Engine::draw() -> void
{
if (this->scene->clear_enabled)
{
this->combine_buffer->buffer->clear(this->scene->clear_color);
}
this->scene->draw(this);
Render::bind_framebuffer(0);
this->shader->bind(this->render_shader, this, nullptr, &this->default_mat, nullptr);
this->combine_buffer->texture->bind(0);
this->view.center_scale_viewport();
this->flipped_object->bind();
this->flipped_object->draw();
}
auto Engine::run() -> void
{
while (!context()->should_close_window())
{
this->time = context()->current_time();
context()->poll();
this->update();
this->draw();
context()->swap_buffers();
}
}
Engine::~Engine()
{
for (Framebuffer *buffer : this->framebuffers)
{
delete buffer;
}
delete this->shader;
delete this->default_object;
delete this->flipped_object;
delete this->fullscreen_object;
}
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