129 lines
3.5 KiB
C++
129 lines
3.5 KiB
C++
// Copyright (c) 2023 Dominic Masters
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//
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// This software is released under the MIT License.
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// https://opensource.org/licenses/MIT
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#include "RenderHost.hpp"
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#include "assert/assertgl.hpp"
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#include "assert/assert.hpp"
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#include "game/Game.hpp"
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#include "display/RenderPipeline.hpp"
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using namespace Dawn;
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RenderHost::RenderHost() : IRenderHost() {
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}
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void RenderHost::init(const std::shared_ptr<Game> game) {
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// Init GLFW
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if(!glfwInit()) {
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assertUnreachable("Failed to initialize GLFW!");
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}
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// Set the error callback for error handling.
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glfwSetErrorCallback([](int error, const char *description) {
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assertUnreachable(description);
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});
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// Setup window hints
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glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, false);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
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// Create the window
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window = glfwCreateWindow(
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DAWN_GLFW_WINDOW_WIDTH_DEFAULT,
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DAWN_GLFW_WINDOW_HEIGHT_DEFAULT,
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"Dawn",
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NULL,
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NULL
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);
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// Validate window exists
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if(!window) assertUnreachable("Failed to create GLFW window!");
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// Setup the user pointer
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glfwSetWindowUserPointer(window, game.get());
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// Load GLAD
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glfwMakeContextCurrent(window);
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glfwSwapInterval(1);
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gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);
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assertNoGLError();
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// Get the resolution and scale/dpi
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backBufferRenderTarget = std::make_shared<BackBufferRenderTarget>();
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int32_t fbWidth, fbHeight;
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int32_t windowWidth, windowHeight;
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glfwGetFramebufferSize(window, &fbWidth, &fbHeight);
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glfwGetWindowSize(window, &windowWidth, &windowHeight);
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assertTrue(fbWidth > 0, "Detected framebuffer width is too small?");
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assertTrue(fbWidth > 0, "Detected framebuffer height is too small?");
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assertTrue(windowWidth > 0, "Detected window width is too small?");
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assertTrue(windowHeight > 0, "Detected window height is too small?");
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backBufferRenderTarget->setSize(fbWidth, fbHeight);
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backBufferRenderTarget->scale = (float_t)fbWidth / (float_t)windowWidth;
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// Framebuffer callback
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glfwSetFramebufferSizeCallback(window, [](
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GLFWwindow *window,
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int32_t width,
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int32_t height
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) {
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// if(this->window == nullptr || window != this->window) return;
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Game* game = (Game*)glfwGetWindowUserPointer(window);
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assertNotNull(game, "Game cannot be null!");
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game->renderHost.backBufferRenderTarget->setSize(width, height);
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});
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}
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void RenderHost::update(const std::shared_ptr<Game> game) {
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// Prepare the initial values
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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assertNoGLError();
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glBlendFuncSeparate(
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GL_SRC_ALPHA,
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GL_ONE_MINUS_SRC_ALPHA,
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GL_ONE,
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GL_ONE_MINUS_SRC_ALPHA
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);
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assertNoGLError();
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glDepthMask(GL_TRUE);
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assertNoGLError();
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glDepthFunc(GL_LESS);
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assertNoGLError();
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glEnable(GL_DEPTH_TEST);
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assertNoGLError();
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// Pipeline
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renderPipeline.render(game);
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// Tick the engine.
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glfwSwapBuffers(window);
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// Update events
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glfwPollEvents();
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}
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bool_t RenderHost::isCloseRequested() {
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if(this->window == nullptr) return false;
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return glfwWindowShouldClose(this->window);
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}
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std::shared_ptr<RenderTarget> RenderHost::getBackBufferRenderTarget() {
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return std::static_pointer_cast<RenderTarget>(backBufferRenderTarget);
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}
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RenderHost::~RenderHost() {
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if(this->window != nullptr) {
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glfwDestroyWindow(this->window);
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this->window = nullptr;
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}
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glfwTerminate();
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} |