💿🐜 Antkeeper source code
https://antkeeper.com
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123 lines
3.7 KiB
123 lines
3.7 KiB
/*
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* Copyright (C) 2021 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 "renderer/simple-render-pass.hpp"
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#include "gl/rasterizer.hpp"
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#include "gl/framebuffer.hpp"
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#include "gl/shader-program.hpp"
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#include "gl/shader-input.hpp"
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#include "gl/vertex-buffer.hpp"
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#include "gl/vertex-array.hpp"
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#include "gl/vertex-attribute.hpp"
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#include "gl/drawing-mode.hpp"
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#include "gl/texture-2d.hpp"
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#include "gl/texture-wrapping.hpp"
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#include "gl/texture-filter.hpp"
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#include "renderer/vertex-attribute.hpp"
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#include "renderer/render-context.hpp"
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#include "renderer/material.hpp"
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#include "renderer/material-property.hpp"
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#include "math/math.hpp"
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#include <glad/glad.h>
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simple_render_pass::simple_render_pass(gl::rasterizer* rasterizer, const gl::framebuffer* framebuffer, gl::shader_program* shader_program):
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render_pass(rasterizer, framebuffer),
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shader_program(shader_program),
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time_tween(nullptr)
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{
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// Create material
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material = new ::material(shader_program);
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// Add standard properties to material
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time_property = material->add_property<float>("time");
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resolution_property = material->add_property<float2>("resolution");
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const float vertex_data[] =
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{
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-1.0f, 1.0f, 0.0f,
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-1.0f, -1.0f, 0.0f,
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1.0f, 1.0f, 0.0f,
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1.0f, 1.0f, 0.0f,
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-1.0f, -1.0f, 0.0f,
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1.0f, -1.0f, 0.0f
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};
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std::size_t vertex_size = 3;
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std::size_t vertex_stride = sizeof(float) * vertex_size;
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std::size_t vertex_count = 6;
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quad_vbo = new gl::vertex_buffer(sizeof(float) * vertex_size * vertex_count, vertex_data);
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quad_vao = new gl::vertex_array();
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// Define position vertex attribute
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gl::vertex_attribute position_attribute;
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position_attribute.buffer = quad_vbo;
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position_attribute.offset = 0;
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position_attribute.stride = vertex_stride;
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position_attribute.type = gl::vertex_attribute_type::float_32;
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position_attribute.components = 3;
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// Bind vertex attributes to VAO
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quad_vao->bind(render::vertex_attribute::position, position_attribute);
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}
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simple_render_pass::~simple_render_pass()
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{
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delete material;
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delete quad_vao;
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delete quad_vbo;
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}
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void simple_render_pass::render(render_context* context) const
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{
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// Bind framebuffer
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rasterizer->use_framebuffer(*framebuffer);
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// Setup graphics context
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glDisable(GL_BLEND);
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glDisable(GL_DEPTH_TEST);
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glDepthMask(GL_FALSE);
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glEnable(GL_CULL_FACE);
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glCullFace(GL_BACK);
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// Setup viewport
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auto viewport = framebuffer->get_dimensions();
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rasterizer->set_viewport(0, 0, std::get<0>(viewport), std::get<1>(viewport));
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// Change shader program
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rasterizer->use_program(*shader_program);
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// Get interpolated time
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float time = (time_tween) ? time_tween->interpolate(context->alpha) : 0.0f;
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// Update material properties
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time_property->set_value(time);
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resolution_property->set_value({static_cast<float>(std::get<0>(viewport)), static_cast<float>(std::get<1>(viewport))});
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// Upload material properties
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material->upload(context->alpha);
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// Draw quad
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rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::triangles, 0, 6);
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}
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void simple_render_pass::set_time_tween(const tween<double>* time)
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{
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this->time_tween = time;
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}
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