278 lines
7.7 KiB
C++
278 lines
7.7 KiB
C++
#include "glfw_view.hpp"
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GLFWView::GLFWView(bool fullscreen) : fullscreen(fullscreen) {}
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GLFWView::~GLFWView() { glfwTerminate(); }
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void GLFWView::initialize(llmr::Map *map) {
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View::initialize(map);
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if (!glfwInit()) {
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fprintf(stderr, "Failed to initialize glfw\n");
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exit(1);
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}
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GLFWmonitor *monitor = nullptr;
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if (fullscreen) {
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monitor = glfwGetPrimaryMonitor();
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}
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#ifdef GL_ES_VERSION_2_0
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glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
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#endif
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glfwWindowHint(GLFW_RED_BITS, 8);
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glfwWindowHint(GLFW_GREEN_BITS, 8);
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glfwWindowHint(GLFW_BLUE_BITS, 8);
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glfwWindowHint(GLFW_ALPHA_BITS, 8);
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glfwWindowHint(GLFW_STENCIL_BITS, 8);
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glfwWindowHint(GLFW_DEPTH_BITS, 16);
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window = glfwCreateWindow(1024, 768, "llmr", monitor, NULL);
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if (!window) {
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glfwTerminate();
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fprintf(stderr, "Failed to initialize window\n");
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exit(1);
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}
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glfwSetWindowUserPointer(window, this);
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glfwMakeContextCurrent(window);
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int width, height;
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glfwGetWindowSize(window, &width, &height);
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int fb_width, fb_height;
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glfwGetFramebufferSize(window, &fb_width, &fb_height);
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resize(window, 0, 0);
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glfwSetCursorPosCallback(window, mousemove);
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glfwSetMouseButtonCallback(window, mouseclick);
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glfwSetWindowSizeCallback(window, resize);
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glfwSetFramebufferSizeCallback(window, resize);
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glfwSetScrollCallback(window, scroll);
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glfwSetKeyCallback(window, key);
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glfwMakeContextCurrent(nullptr);
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}
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void GLFWView::key(GLFWwindow *window, int key, int /*scancode*/, int action, int mods) {
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GLFWView *view = (GLFWView *)glfwGetWindowUserPointer(window);
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if (action == GLFW_RELEASE) {
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switch (key) {
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case GLFW_KEY_ESCAPE:
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glfwSetWindowShouldClose(window, true);
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break;
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case GLFW_KEY_TAB:
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view->map->toggleDebug();
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break;
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case GLFW_KEY_X:
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if (!mods)
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view->map->resetPosition();
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break;
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case GLFW_KEY_R:
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if (!mods)
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view->map->toggleRaster();
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break;
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case GLFW_KEY_N:
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if (!mods)
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view->map->resetNorth();
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break;
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}
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}
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}
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void GLFWView::scroll(GLFWwindow *window, double /*xoffset*/, double yoffset) {
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GLFWView *view = (GLFWView *)glfwGetWindowUserPointer(window);
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double delta = yoffset * 40;
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bool is_wheel = delta != 0 && std::fmod(delta, 4.000244140625) == 0;
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double absdelta = delta < 0 ? -delta : delta;
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double scale = 2.0 / (1.0 + std::exp(-absdelta / 100.0));
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// Make the scroll wheel a bit slower.
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if (!is_wheel) {
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scale = (scale - 1.0) / 2.0 + 1.0;
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}
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// Zooming out.
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if (delta < 0 && scale != 0) {
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scale = 1.0 / scale;
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}
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view->map->startScaling();
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view->map->scaleBy(scale, view->last_x, view->last_y);
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}
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void GLFWView::resize(GLFWwindow *window, int, int) {
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GLFWView *view = (GLFWView *)glfwGetWindowUserPointer(window);
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int width, height;
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glfwGetWindowSize(window, &width, &height);
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int fb_width, fb_height;
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glfwGetFramebufferSize(window, &fb_width, &fb_height);
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view->map->resize(width, height, (float)fb_width / (float)width, fb_width, fb_height);
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}
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void GLFWView::mouseclick(GLFWwindow *window, int button, int action, int modifiers) {
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GLFWView *view = (GLFWView *)glfwGetWindowUserPointer(window);
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if (button == GLFW_MOUSE_BUTTON_RIGHT ||
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(button == GLFW_MOUSE_BUTTON_LEFT && modifiers & GLFW_MOD_CONTROL)) {
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view->rotating = action == GLFW_PRESS;
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if (!view->rotating) {
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view->map->stopRotating();
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}
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} else if (button == GLFW_MOUSE_BUTTON_LEFT) {
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view->tracking = action == GLFW_PRESS;
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if (action == GLFW_RELEASE) {
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view->map->stopPanning();
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double now = glfwGetTime();
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if (now - view->last_click < 0.4 /* ms */) {
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if (modifiers & GLFW_MOD_SHIFT) {
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view->map->scaleBy(0.5, view->last_x, view->last_y, 0.5);
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} else {
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view->map->scaleBy(2.0, view->last_x, view->last_y, 0.5);
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}
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}
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view->last_click = now;
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}
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}
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}
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void GLFWView::mousemove(GLFWwindow *window, double x, double y) {
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GLFWView *view = (GLFWView *)glfwGetWindowUserPointer(window);
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if (view->tracking) {
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double dx = x - view->last_x;
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double dy = y - view->last_y;
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if (dx || dy) {
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view->map->startPanning();
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view->map->moveBy(dx, dy);
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}
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} else if (view->rotating) {
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view->map->startRotating();
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view->map->rotateBy(view->last_x, view->last_y, x, y);
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}
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view->last_x = x;
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view->last_y = y;
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}
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int GLFWView::run() {
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map->start();
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while (!glfwWindowShouldClose(window)) {
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if (map->needsSwap()) {
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glfwSwapBuffers(window);
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map->swapped();
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fps();
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}
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glfwWaitEvents();
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}
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map->stop();
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return 0;
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}
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void GLFWView::make_active() {
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glfwMakeContextCurrent(window);
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}
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void GLFWView::swap() {
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glfwPostEmptyEvent();
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}
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void GLFWView::fps() {
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static int frames = 0;
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static double time_elapsed = 0;
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frames++;
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double current_time = glfwGetTime();
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if (current_time - time_elapsed >= 1) {
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fprintf(stderr, "FPS: %4.2f\n", frames / (current_time - time_elapsed));
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time_elapsed = current_time;
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frames = 0;
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}
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}
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namespace llmr {
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namespace platform {
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double elapsed() { return glfwGetTime(); }
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void show_debug_image(std::string name, const char *data, size_t width, size_t height) {
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glfwInit();
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static GLFWwindow *debug_window = nullptr;
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if (!debug_window) {
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debug_window = glfwCreateWindow(width, height, name.c_str(), nullptr, nullptr);
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if (!debug_window) {
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glfwTerminate();
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fprintf(stderr, "Failed to initialize window\n");
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exit(1);
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}
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}
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GLFWwindow *current_window = glfwGetCurrentContext();
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glfwSetWindowSize(debug_window, width, height);
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glfwMakeContextCurrent(debug_window);
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int fb_width, fb_height;
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glfwGetFramebufferSize(debug_window, &fb_width, &fb_height);
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float scale = (float)fb_width / (float)width;
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glPixelZoom(scale, -scale);
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glRasterPos2f(-1.0f, 1.0f);
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glDrawPixels(width, height, GL_LUMINANCE, GL_UNSIGNED_BYTE, data);
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glfwSwapBuffers(debug_window);
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glfwMakeContextCurrent(current_window);
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}
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void show_color_debug_image(std::string name, const char *data, size_t logical_width, size_t logical_height, size_t width, size_t height) {
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glfwInit();
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static GLFWwindow *debug_window = nullptr;
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if (!debug_window) {
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debug_window = glfwCreateWindow(logical_width, logical_height, name.c_str(), nullptr, nullptr);
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if (!debug_window) {
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glfwTerminate();
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fprintf(stderr, "Failed to initialize window\n");
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exit(1);
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}
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}
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GLFWwindow *current_window = glfwGetCurrentContext();
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glfwSetWindowSize(debug_window, logical_width, logical_height);
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glfwMakeContextCurrent(debug_window);
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int fb_width, fb_height;
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glfwGetFramebufferSize(debug_window, &fb_width, &fb_height);
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float x_scale = (float)fb_width / (float)width;
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float y_scale = (float)fb_height / (float)height;
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glClear(GL_COLOR_BUFFER_BIT);
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glEnable(GL_BLEND);
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glBlendFunc(GL_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glPixelZoom(x_scale, -y_scale);
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glRasterPos2f(-1.0f, 1.0f);
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glDrawPixels(width, height, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, data);
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glfwSwapBuffers(debug_window);
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glfwMakeContextCurrent(current_window);
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}
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}
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}
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