mirror of
https://github.com/Kelsidavis/WoWee.git
synced 2026-03-24 08:00:14 +00:00
6f33392155
Loading screen now shows a gold progress bar with percentage and status text. All loading steps poll SDL events for window resize and quit.
399 lines
12 KiB
C++
399 lines
12 KiB
C++
#include "rendering/loading_screen.hpp"
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#include "core/logger.hpp"
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#include <imgui.h>
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#include <imgui_impl_opengl3.h>
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#include <imgui_impl_sdl2.h>
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#include <random>
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#include <chrono>
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#include <cstdio>
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#define STB_IMAGE_IMPLEMENTATION
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#include "stb_image.h"
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namespace wowee {
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namespace rendering {
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LoadingScreen::LoadingScreen() {
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imagePaths.push_back("assets/loading1.jpeg");
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imagePaths.push_back("assets/loading2.jpeg");
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}
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LoadingScreen::~LoadingScreen() {
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shutdown();
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}
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bool LoadingScreen::initialize() {
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LOG_INFO("Initializing loading screen");
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// Background image shader (textured quad)
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const char* vertexSrc = R"(
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#version 330 core
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layout (location = 0) in vec2 aPos;
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layout (location = 1) in vec2 aTexCoord;
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out vec2 TexCoord;
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void main() {
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gl_Position = vec4(aPos, 0.0, 1.0);
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TexCoord = aTexCoord;
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}
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)";
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const char* fragmentSrc = R"(
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#version 330 core
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in vec2 TexCoord;
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out vec4 FragColor;
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uniform sampler2D screenTexture;
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void main() {
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FragColor = texture(screenTexture, TexCoord);
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}
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)";
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GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(vertexShader, 1, &vertexSrc, nullptr);
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glCompileShader(vertexShader);
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GLint success;
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glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
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if (!success) {
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char infoLog[512];
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glGetShaderInfoLog(vertexShader, 512, nullptr, infoLog);
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LOG_ERROR("Loading screen vertex shader compilation failed: ", infoLog);
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return false;
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}
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GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(fragmentShader, 1, &fragmentSrc, nullptr);
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glCompileShader(fragmentShader);
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glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
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if (!success) {
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char infoLog[512];
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glGetShaderInfoLog(fragmentShader, 512, nullptr, infoLog);
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LOG_ERROR("Loading screen fragment shader compilation failed: ", infoLog);
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return false;
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}
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shaderId = glCreateProgram();
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glAttachShader(shaderId, vertexShader);
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glAttachShader(shaderId, fragmentShader);
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glLinkProgram(shaderId);
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glGetProgramiv(shaderId, GL_LINK_STATUS, &success);
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if (!success) {
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char infoLog[512];
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glGetProgramInfoLog(shaderId, 512, nullptr, infoLog);
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LOG_ERROR("Loading screen shader linking failed: ", infoLog);
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return false;
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}
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glDeleteShader(vertexShader);
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glDeleteShader(fragmentShader);
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// Simple solid-color shader for progress bar
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const char* barVertSrc = R"(
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#version 330 core
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layout (location = 0) in vec2 aPos;
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void main() {
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gl_Position = vec4(aPos, 0.0, 1.0);
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}
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)";
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const char* barFragSrc = R"(
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#version 330 core
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out vec4 FragColor;
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uniform vec4 uColor;
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void main() {
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FragColor = uColor;
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}
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)";
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GLuint bv = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(bv, 1, &barVertSrc, nullptr);
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glCompileShader(bv);
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GLuint bf = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(bf, 1, &barFragSrc, nullptr);
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glCompileShader(bf);
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barShaderId = glCreateProgram();
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glAttachShader(barShaderId, bv);
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glAttachShader(barShaderId, bf);
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glLinkProgram(barShaderId);
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glDeleteShader(bv);
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glDeleteShader(bf);
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createQuad();
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createBarQuad();
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selectRandomImage();
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LOG_INFO("Loading screen initialized");
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return true;
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}
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void LoadingScreen::shutdown() {
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if (textureId) {
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glDeleteTextures(1, &textureId);
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textureId = 0;
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}
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if (vao) {
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glDeleteVertexArrays(1, &vao);
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vao = 0;
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}
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if (vbo) {
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glDeleteBuffers(1, &vbo);
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vbo = 0;
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}
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if (shaderId) {
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glDeleteProgram(shaderId);
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shaderId = 0;
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}
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if (barVao) {
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glDeleteVertexArrays(1, &barVao);
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barVao = 0;
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}
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if (barVbo) {
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glDeleteBuffers(1, &barVbo);
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barVbo = 0;
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}
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if (barShaderId) {
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glDeleteProgram(barShaderId);
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barShaderId = 0;
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}
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}
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void LoadingScreen::selectRandomImage() {
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if (imagePaths.empty()) return;
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unsigned seed = static_cast<unsigned>(
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std::chrono::system_clock::now().time_since_epoch().count());
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std::default_random_engine generator(seed);
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std::uniform_int_distribution<int> distribution(0, imagePaths.size() - 1);
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currentImageIndex = distribution(generator);
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LOG_INFO("Selected loading screen: ", imagePaths[currentImageIndex]);
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loadImage(imagePaths[currentImageIndex]);
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}
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bool LoadingScreen::loadImage(const std::string& path) {
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if (textureId) {
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glDeleteTextures(1, &textureId);
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textureId = 0;
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}
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int channels;
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stbi_set_flip_vertically_on_load(true);
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unsigned char* data = stbi_load(path.c_str(), &imageWidth, &imageHeight, &channels, 4);
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if (!data) {
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LOG_ERROR("Failed to load loading screen image: ", path);
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return false;
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}
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LOG_INFO("Loaded loading screen image: ", imageWidth, "x", imageHeight);
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glGenTextures(1, &textureId);
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glBindTexture(GL_TEXTURE_2D, textureId);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, imageWidth, imageHeight, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, data);
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stbi_image_free(data);
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glBindTexture(GL_TEXTURE_2D, 0);
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return true;
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}
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void LoadingScreen::createQuad() {
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float vertices[] = {
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// Position // TexCoord
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-1.0f, 1.0f, 0.0f, 1.0f,
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-1.0f, -1.0f, 0.0f, 0.0f,
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1.0f, -1.0f, 1.0f, 0.0f,
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-1.0f, 1.0f, 0.0f, 1.0f,
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1.0f, -1.0f, 1.0f, 0.0f,
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1.0f, 1.0f, 1.0f, 1.0f
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};
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glGenVertexArrays(1, &vao);
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glGenBuffers(1, &vbo);
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glBindVertexArray(vao);
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glBindBuffer(GL_ARRAY_BUFFER, vbo);
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
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glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (void*)0);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (void*)(2 * sizeof(float)));
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glEnableVertexAttribArray(1);
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glBindVertexArray(0);
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}
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void LoadingScreen::createBarQuad() {
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// Dynamic quad — vertices updated each frame via glBufferSubData
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glGenVertexArrays(1, &barVao);
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glGenBuffers(1, &barVbo);
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glBindVertexArray(barVao);
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glBindBuffer(GL_ARRAY_BUFFER, barVbo);
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glBufferData(GL_ARRAY_BUFFER, 12 * sizeof(float), nullptr, GL_DYNAMIC_DRAW);
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glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), (void*)0);
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glEnableVertexAttribArray(0);
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glBindVertexArray(0);
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}
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void LoadingScreen::render() {
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if (!vao || !shaderId) return;
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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glDisable(GL_DEPTH_TEST);
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// Draw background image
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if (textureId) {
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glUseProgram(shaderId);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, textureId);
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glBindVertexArray(vao);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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glBindVertexArray(0);
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}
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// Draw progress bar at bottom center
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if (barVao && barShaderId) {
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// Bar dimensions in NDC: centered, near bottom
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const float barWidth = 0.6f; // half-width in NDC (total 1.2 of 2.0 range = 60% of screen)
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const float barHeight = 0.015f;
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const float barY = -0.82f; // near bottom
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float left = -barWidth;
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float right = -barWidth + 2.0f * barWidth * loadProgress;
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float top = barY + barHeight;
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float bottom = barY - barHeight;
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// Background (dark)
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{
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float bgVerts[] = {
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-barWidth, top,
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-barWidth, bottom,
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barWidth, bottom,
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-barWidth, top,
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barWidth, bottom,
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barWidth, top,
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};
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glUseProgram(barShaderId);
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GLint colorLoc = glGetUniformLocation(barShaderId, "uColor");
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glUniform4f(colorLoc, 0.1f, 0.1f, 0.1f, 0.8f);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glBindVertexArray(barVao);
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glBindBuffer(GL_ARRAY_BUFFER, barVbo);
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glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(bgVerts), bgVerts);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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}
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// Filled portion (gold/amber like WoW)
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if (loadProgress > 0.001f) {
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float fillVerts[] = {
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left, top,
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left, bottom,
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right, bottom,
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left, top,
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right, bottom,
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right, top,
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};
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GLint colorLoc = glGetUniformLocation(barShaderId, "uColor");
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glUniform4f(colorLoc, 0.78f, 0.61f, 0.13f, 1.0f);
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glBindBuffer(GL_ARRAY_BUFFER, barVbo);
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glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(fillVerts), fillVerts);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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}
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// Border (thin bright outline)
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{
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const float borderInset = 0.002f;
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float borderLeft = -barWidth - borderInset;
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float borderRight = barWidth + borderInset;
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float borderTop = top + borderInset;
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float borderBottom = bottom - borderInset;
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// Draw 4 thin border edges as line strip
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glUseProgram(barShaderId);
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GLint colorLoc = glGetUniformLocation(barShaderId, "uColor");
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glUniform4f(colorLoc, 0.55f, 0.43f, 0.1f, 1.0f);
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float borderVerts[] = {
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borderLeft, borderTop,
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borderRight, borderTop,
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borderRight, borderBottom,
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borderLeft, borderBottom,
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borderLeft, borderTop,
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};
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glBindBuffer(GL_ARRAY_BUFFER, barVbo);
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glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(borderVerts), borderVerts);
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glDrawArrays(GL_LINE_STRIP, 0, 5);
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}
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glBindVertexArray(0);
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glDisable(GL_BLEND);
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}
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// Draw status text and percentage with ImGui overlay
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{
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ImGuiIO& io = ImGui::GetIO();
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float screenW = io.DisplaySize.x;
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float screenH = io.DisplaySize.y;
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ImGui_ImplOpenGL3_NewFrame();
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ImGui_ImplSDL2_NewFrame();
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ImGui::NewFrame();
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// Invisible fullscreen window for text overlay
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ImGui::SetNextWindowPos(ImVec2(0, 0));
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ImGui::SetNextWindowSize(ImVec2(screenW, screenH));
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ImGui::Begin("##LoadingOverlay", nullptr,
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ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoResize |
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ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoScrollbar |
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ImGuiWindowFlags_NoInputs | ImGuiWindowFlags_NoBackground |
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ImGuiWindowFlags_NoBringToFrontOnFocus);
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// Percentage text centered above bar
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char pctBuf[32];
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snprintf(pctBuf, sizeof(pctBuf), "%d%%", static_cast<int>(loadProgress * 100.0f));
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float barCenterY = screenH * (1.0f - ((-0.82f + 1.0f) / 2.0f)); // NDC -0.82 to screen Y
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float textY = barCenterY - 30.0f;
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ImVec2 pctSize = ImGui::CalcTextSize(pctBuf);
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ImGui::SetCursorPos(ImVec2((screenW - pctSize.x) * 0.5f, textY));
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ImGui::TextColored(ImVec4(1.0f, 1.0f, 1.0f, 1.0f), "%s", pctBuf);
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// Status text centered below bar
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float statusY = barCenterY + 16.0f;
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ImVec2 statusSize = ImGui::CalcTextSize(statusText.c_str());
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ImGui::SetCursorPos(ImVec2((screenW - statusSize.x) * 0.5f, statusY));
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ImGui::TextColored(ImVec4(0.8f, 0.8f, 0.8f, 1.0f), "%s", statusText.c_str());
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ImGui::End();
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ImGui::Render();
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ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
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}
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glEnable(GL_DEPTH_TEST);
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}
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} // namespace rendering
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} // namespace wowee
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