💿🐜 Antkeeper source code
https://antkeeper.com
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251 lines
9.8 KiB
251 lines
9.8 KiB
/*
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* Copyright (C) 2023 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "game/graphics.hpp"
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#include "config.hpp"
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#include "debug/log.hpp"
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#include "gl/framebuffer.hpp"
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#include "gl/texture-2d.hpp"
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#include "gl/texture-filter.hpp"
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#include "gl/texture-wrapping.hpp"
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#include "render/passes/bloom-pass.hpp"
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#include "render/passes/final-pass.hpp"
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#include "render/passes/fxaa-pass.hpp"
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#include "render/passes/resample-pass.hpp"
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#include <chrono>
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#include <filesystem>
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#include <format>
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#include <glad/glad.h>
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#include <stb/stb_image_write.h>
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#include <thread>
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namespace game {
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namespace graphics {
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static void reroute_framebuffers(game::context& ctx);
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void create_framebuffers(game::context& ctx)
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{
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debug::log::trace("Creating framebuffers...");
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// Calculate render resolution
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const int2& viewport_size = ctx.app->get_viewport_size();
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ctx.render_resolution = {static_cast<int>(viewport_size.x() * ctx.render_scale + 0.5f), static_cast<int>(viewport_size.y() * ctx.render_scale + 0.5f)};
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// Create HDR framebuffer (32F color, 32F depth)
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ctx.hdr_color_texture = new gl::texture_2d(ctx.render_resolution.x(), ctx.render_resolution.y(), gl::pixel_type::float_32, gl::pixel_format::rgb);
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ctx.hdr_color_texture->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
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ctx.hdr_color_texture->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
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ctx.hdr_color_texture->set_max_anisotropy(0.0f);
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ctx.hdr_depth_texture = new gl::texture_2d(ctx.render_resolution.x(), ctx.render_resolution.y(), gl::pixel_type::float_32, gl::pixel_format::ds);
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ctx.hdr_depth_texture->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
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ctx.hdr_depth_texture->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
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ctx.hdr_depth_texture->set_max_anisotropy(0.0f);
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ctx.hdr_framebuffer = new gl::framebuffer(ctx.render_resolution.x(), ctx.render_resolution.y());
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ctx.hdr_framebuffer->attach(gl::framebuffer_attachment_type::color, ctx.hdr_color_texture);
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ctx.hdr_framebuffer->attach(gl::framebuffer_attachment_type::depth, ctx.hdr_depth_texture);
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ctx.hdr_framebuffer->attach(gl::framebuffer_attachment_type::stencil, ctx.hdr_depth_texture);
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// Create LDR framebuffers (8-bit color, no depth)
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ctx.ldr_color_texture_a = new gl::texture_2d(ctx.render_resolution.x(), ctx.render_resolution.y(), gl::pixel_type::uint_8, gl::pixel_format::rgb);
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ctx.ldr_color_texture_a->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
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ctx.ldr_color_texture_a->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
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ctx.ldr_color_texture_a->set_max_anisotropy(0.0f);
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ctx.ldr_framebuffer_a = new gl::framebuffer(ctx.render_resolution.x(), ctx.render_resolution.y());
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ctx.ldr_framebuffer_a->attach(gl::framebuffer_attachment_type::color, ctx.ldr_color_texture_a);
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ctx.ldr_color_texture_b = new gl::texture_2d(ctx.render_resolution.x(), ctx.render_resolution.y(), gl::pixel_type::uint_8, gl::pixel_format::rgb);
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ctx.ldr_color_texture_b->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
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ctx.ldr_color_texture_b->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
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ctx.ldr_color_texture_b->set_max_anisotropy(0.0f);
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ctx.ldr_framebuffer_b = new gl::framebuffer(ctx.render_resolution.x(), ctx.render_resolution.y());
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ctx.ldr_framebuffer_b->attach(gl::framebuffer_attachment_type::color, ctx.ldr_color_texture_b);
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// Create shadow map framebuffer
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ctx.shadow_map_depth_texture = new gl::texture_2d(ctx.shadow_map_resolution, ctx.shadow_map_resolution, gl::pixel_type::float_32, gl::pixel_format::d);
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ctx.shadow_map_depth_texture->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
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ctx.shadow_map_depth_texture->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
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ctx.shadow_map_depth_texture->set_max_anisotropy(0.0f);
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ctx.shadow_map_framebuffer = new gl::framebuffer(ctx.shadow_map_resolution, ctx.shadow_map_resolution);
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ctx.shadow_map_framebuffer->attach(gl::framebuffer_attachment_type::depth, ctx.shadow_map_depth_texture);
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debug::log::trace("Created framebuffers");
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}
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void destroy_framebuffers(game::context& ctx)
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{
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debug::log::trace("Destroying framebuffers...");
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// Delete HDR framebuffer and its attachments
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delete ctx.hdr_framebuffer;
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ctx.hdr_framebuffer = nullptr;
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delete ctx.hdr_color_texture;
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ctx.hdr_color_texture = nullptr;
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delete ctx.hdr_depth_texture;
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ctx.hdr_depth_texture = nullptr;
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// Delete LDR framebuffers and attachments
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delete ctx.ldr_framebuffer_a;
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ctx.ldr_framebuffer_a = nullptr;
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delete ctx.ldr_color_texture_a;
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ctx.ldr_color_texture_a = nullptr;
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delete ctx.ldr_framebuffer_b;
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ctx.ldr_framebuffer_b = nullptr;
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delete ctx.ldr_color_texture_b;
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ctx.ldr_color_texture_b = nullptr;
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// Delete shadow map framebuffer and its attachments
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delete ctx.shadow_map_framebuffer;
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ctx.shadow_map_framebuffer = nullptr;
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delete ctx.shadow_map_depth_texture;
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ctx.shadow_map_depth_texture = nullptr;
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debug::log::trace("Destroyed framebuffers");
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}
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void change_render_resolution(game::context& ctx, float scale)
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{
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debug::log::trace("Changing render resolution to {}...", scale);
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// Update render resolution scale
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ctx.render_scale = scale;
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// Recalculate render resolution
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const int2& viewport_size = ctx.app->get_viewport_size();
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ctx.render_resolution = {static_cast<int>(viewport_size.x() * ctx.render_scale + 0.5f), static_cast<int>(viewport_size.y() * ctx.render_scale + 0.5f)};
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// Resize HDR framebuffer and attachments
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ctx.hdr_framebuffer->resize({ctx.render_resolution.x(), ctx.render_resolution.y()});
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ctx.hdr_color_texture->resize(ctx.render_resolution.x(), ctx.render_resolution.y(), nullptr);
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ctx.hdr_depth_texture->resize(ctx.render_resolution.x(), ctx.render_resolution.y(), nullptr);
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// Resize LDR framebuffers and attachments
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ctx.ldr_framebuffer_a->resize({ctx.render_resolution.x(), ctx.render_resolution.y()});
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ctx.ldr_color_texture_a->resize(ctx.render_resolution.x(), ctx.render_resolution.y(), nullptr);
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ctx.ldr_framebuffer_b->resize({ctx.render_resolution.x(), ctx.render_resolution.y()});
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ctx.ldr_color_texture_b->resize(ctx.render_resolution.x(), ctx.render_resolution.y(), nullptr);
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// Resize bloom render pass
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ctx.bloom_pass->resize();
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// Enable or disable resample pass
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if (viewport_size.x() != ctx.render_resolution.x() || viewport_size.y() != ctx.render_resolution.y())
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{
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ctx.resample_pass->set_enabled(true);
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}
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else
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{
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ctx.resample_pass->set_enabled(false);
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}
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reroute_framebuffers(ctx);
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debug::log::trace("Changed render resolution to {}", scale);
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}
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void save_screenshot(game::context& ctx)
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{
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// Determine timestamped screenshot filename
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const auto time = std::chrono::floor<std::chrono::milliseconds>(std::chrono::system_clock::now());
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const std::string screenshot_filename = std::format("{0}-{1:%Y%m%d}T{1:%H%M%S}Z.png", config::application_name, time);
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// Determine path to screenshot file
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std::filesystem::path screenshot_filepath = ctx.screenshots_path / screenshot_filename;
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std::string screenshot_filepath_string = screenshot_filepath.string();
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debug::log::debug("Saving screenshot to \"{}\"...", screenshot_filepath_string);
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// Get viewport dimensions
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const int2& viewport_size = ctx.app->get_viewport_size();
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// Allocate screenshot image
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std::shared_ptr<image> frame = std::make_shared<image>();
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frame->format(1, 3);
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frame->resize(viewport_size.x(), viewport_size.y());
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// Read pixel data from backbuffer into image
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glReadBuffer(GL_BACK);
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glReadPixels(0, 0, viewport_size.x(), viewport_size.y(), GL_RGB, GL_UNSIGNED_BYTE, frame->data());
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// Write screenshot file in separate thread
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std::thread
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(
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[frame, path = std::move(screenshot_filepath_string)]
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{
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stbi_flip_vertically_on_write(1);
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stbi_write_png(path.c_str(), frame->get_width(), frame->get_height(), frame->get_channel_count(), frame->data(), frame->get_width() * frame->get_channel_count());
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debug::log::debug("Saved screenshot to \"{}\"", path);
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}
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).detach();
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}
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void select_anti_aliasing_method(game::context& ctx, render::anti_aliasing_method method)
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{
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// Switch AA method
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switch (method)
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{
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// Off
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case render::anti_aliasing_method::none:
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ctx.fxaa_pass->set_enabled(false);
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reroute_framebuffers(ctx);
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break;
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// FXAA
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case render::anti_aliasing_method::fxaa:
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ctx.fxaa_pass->set_enabled(true);
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reroute_framebuffers(ctx);
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break;
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}
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// Update AA method setting
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ctx.anti_aliasing_method = method;
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}
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void reroute_framebuffers(game::context& ctx)
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{
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if (ctx.fxaa_pass->is_enabled())
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{
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if (ctx.resample_pass->is_enabled())
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{
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ctx.common_final_pass->set_framebuffer(ctx.ldr_framebuffer_a);
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ctx.fxaa_pass->set_framebuffer(ctx.ldr_framebuffer_b);
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}
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else
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{
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ctx.common_final_pass->set_framebuffer(ctx.ldr_framebuffer_a);
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ctx.fxaa_pass->set_framebuffer(&ctx.rasterizer->get_default_framebuffer());
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}
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}
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else
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{
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if (ctx.resample_pass->is_enabled())
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{
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ctx.common_final_pass->set_framebuffer(ctx.ldr_framebuffer_b);
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}
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else
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{
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ctx.common_final_pass->set_framebuffer(&ctx.rasterizer->get_default_framebuffer());
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}
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}
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}
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} // namespace graphics
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} // namespace game
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