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- /*
- * Copyright (C) 2021 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #include "renderer/simple-render-pass.hpp"
- #include "gl/rasterizer.hpp"
- #include "gl/framebuffer.hpp"
- #include "gl/shader-program.hpp"
- #include "gl/shader-input.hpp"
- #include "gl/vertex-buffer.hpp"
- #include "gl/vertex-array.hpp"
- #include "gl/vertex-attribute-type.hpp"
- #include "gl/drawing-mode.hpp"
- #include "gl/texture-2d.hpp"
- #include "gl/texture-wrapping.hpp"
- #include "gl/texture-filter.hpp"
- #include "renderer/vertex-attributes.hpp"
- #include "renderer/render-context.hpp"
- #include "renderer/material.hpp"
- #include "renderer/material-property.hpp"
- #include "math/math.hpp"
- #include <glad/glad.h>
-
- simple_render_pass::simple_render_pass(gl::rasterizer* rasterizer, const gl::framebuffer* framebuffer, gl::shader_program* shader_program):
- render_pass(rasterizer, framebuffer),
- shader_program(shader_program),
- time_tween(nullptr)
- {
- // Create material
- material = new ::material(shader_program);
-
- // Add standard properties to material
- time_property = material->add_property<float>("time");
- resolution_property = material->add_property<float2>("resolution");
-
- const float vertex_data[] =
- {
- -1.0f, 1.0f, 0.0f,
- -1.0f, -1.0f, 0.0f,
- 1.0f, 1.0f, 0.0f,
- 1.0f, 1.0f, 0.0f,
- -1.0f, -1.0f, 0.0f,
- 1.0f, -1.0f, 0.0f
- };
-
- std::size_t vertex_size = 3;
- std::size_t vertex_stride = sizeof(float) * vertex_size;
- std::size_t vertex_count = 6;
-
- quad_vbo = new gl::vertex_buffer(sizeof(float) * vertex_size * vertex_count, vertex_data);
- quad_vao = new gl::vertex_array();
- quad_vao->bind_attribute(VERTEX_POSITION_LOCATION, *quad_vbo, 3, gl::vertex_attribute_type::float_32, vertex_stride, 0);
- }
-
- simple_render_pass::~simple_render_pass()
- {
- delete material;
- delete quad_vao;
- delete quad_vbo;
- }
-
- void simple_render_pass::render(render_context* context) const
- {
- // Bind framebuffer
- rasterizer->use_framebuffer(*framebuffer);
-
- // Setup graphics context
- glDisable(GL_BLEND);
- glDisable(GL_DEPTH_TEST);
- glDepthMask(GL_FALSE);
- glEnable(GL_CULL_FACE);
- glCullFace(GL_BACK);
-
- // Setup viewport
- auto viewport = framebuffer->get_dimensions();
- rasterizer->set_viewport(0, 0, std::get<0>(viewport), std::get<1>(viewport));
-
- // Change shader program
- rasterizer->use_program(*shader_program);
-
- // Get interpolated time
- float time = (time_tween) ? time_tween->interpolate(context->alpha) : 0.0f;
-
- // Update material properties
- time_property->set_value(time);
- resolution_property->set_value({static_cast<float>(std::get<0>(viewport)), static_cast<float>(std::get<1>(viewport))});
-
- // Upload material properties
- material->upload(context->alpha);
-
- // Draw quad
- rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::triangles, 0, 6);
- }
-
- void simple_render_pass::set_time_tween(const tween<double>* time)
- {
- this->time_tween = time;
- }
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