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#include <emscripten/emscripten.h>
#include <GL/glfw.h>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <llmr/llmr.hpp>
#include <llmr/map/tile.hpp>
bool dirty = true;
class MapView;
static MapView *view;
class MapView {
public:
MapView() :
dirty(true),
platform(new llmr::platform(this)),
painter(new llmr::painter(platform)),
map(new llmr::map(platform, painter)) {
// Initialize GLFW
if (!glfwInit()) {
fprintf(stderr, "Failed to initialize GLFW\n");
exit(1);
}
int width, height;
emscripten_get_canvas_size(&width, &height, NULL);
glfwSetMousePosCallback(mousemove);
glfwSetMouseButtonCallback(mouseclick);
glfwSetMouseWheelCallback(scroll);
// Open a window and create its OpenGL context
if (!glfwOpenWindow(width, height, 8, 8, 8, 8, 16, 8, GLFW_WINDOW)) {
fprintf(stderr, "Failed to open GLFW window\n");
glfwTerminate();
exit(1);
}
painter->setup();
painter->resize(width, height);
}
~MapView() {
delete map;
delete painter;
delete platform;
glfwTerminate();
}
static void mousemove(int x, int y) {
if (view->tracking) {
view->map->moveBy(x - view->last_x, y - view->last_y);
}
view->last_x = x;
view->last_y = y;
}
static void scroll(float pos) {
double delta = pos;
bool is_wheel = delta != 0 && fmod(delta, 4.000244140625) == 0;
double absdelta = delta < 0 ? -delta : delta;
double scale = 2.0 / (1.0 + exp(-absdelta / 100.0));
// Make the scroll wheel a bit slower.
// if (!is_wheel) {
// scale = (scale - 1.0) / 2.0 + 1.0;
// }
// Zooming out.
if (delta < 0 && scale != 0) {
scale = 1.0 / scale;
}
view->map->scaleBy(scale, view->last_x, view->last_y);
}
static void mouseclick(int button, int action) {
if (button == GLFW_MOUSE_BUTTON_1) {
view->tracking = action == GLFW_PRESS;
}
}
int run() {
emscripten_set_main_loop(render, 60, 1);
return 0;
}
static void render() {
if (view->dirty) {
view->map->render();
// glClearColor(1, 1, 0, 1);
// glClear(GL_COLOR_BUFFER_BIT);
view->dirty = false;
}
}
bool dirty;
double last_x, last_y;
bool tracking;
llmr::platform *platform;
llmr::painter *painter;
llmr::map *map;
};
void llmr::platform::restart() {
view->dirty = true;
}
void ontileload(void* custom, void* bytes, int length) {
fprintf(stderr, "data loaded successfully: length: %d\n", length);
llmr::tile *tile = (llmr::tile *)custom;
tile->setData((uint8_t *)bytes, length);
if (tile->parse()) {
view->map->tileLoaded(tile);
return;
}
}
void ontileerror(void* custom) {
fprintf(stderr, "data load error\n");
llmr::tile *tile = (llmr::tile *)custom;
view->map->tileFailed(tile);
}
void llmr::platform::request(tile *tile) {
const char *urlTemplate = "http://api.tiles.mapbox.com/v3/mapbox.mapbox-streets-v4/%d/%d/%d.vector.pbf";
char urlString[255];
snprintf(urlString, 255, urlTemplate, tile->z, tile->x, tile->y);
fprintf(stderr, "requesting %s\n", urlString);
emscripten_async_wget_data(urlString, tile, ontileload, ontileerror);
}
int main() {
view = new MapView();
int ret = view->run();
delete view;
return ret;
}
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