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glfw_view.cpp
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#include "glfw_view.hpp"
#include "glfw_backend.hpp"
#include "glfw_renderer_frontend.hpp"
#include "ny_route.hpp"
#include "test_writer.hpp"
#include <mbgl/annotation/annotation.hpp>
#include <mbgl/gfx/backend.hpp>
#include <mbgl/gfx/backend_scope.hpp>
#include <mbgl/map/camera.hpp>
#include <mbgl/math/angles.hpp>
#include <mbgl/renderer/renderer.hpp>
#include <mbgl/style/expression/dsl.hpp>
#include <mbgl/style/image.hpp>
#include <mbgl/style/layers/fill_extrusion_layer.hpp>
#include <mbgl/style/layers/fill_layer.hpp>
#include <mbgl/style/layers/line_layer.hpp>
#include <mbgl/style/sources/custom_geometry_source.hpp>
#include <mbgl/style/sources/geojson_source.hpp>
#include <mbgl/style/style.hpp>
#include <mbgl/style/transition_options.hpp>
#include <mbgl/util/chrono.hpp>
#include <mbgl/util/geo.hpp>
#include <mbgl/util/interpolate.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/util/instrumentation.hpp>
#include <mbgl/util/platform.hpp>
#include <mbgl/util/string.hpp>
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4244)
#pragma warning(disable : 4267)
#endif
#include <mapbox/cheap_ruler.hpp>
#include <mapbox/geometry.hpp>
#include <mapbox/geojson.hpp>
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#if !defined(__APPLE__)
#define GLFW_INCLUDE_ES3
#endif
#if MLN_RENDER_BACKEND_VULKAN
#define GLFW_INCLUDE_VULKAN
#endif
#define GL_GLEXT_PROTOTYPES
#include <GLFW/glfw3.h>
#include <cassert>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <utility>
#include <sstream>
#include <numbers>
using namespace std::numbers;
#if defined(MLN_RENDER_BACKEND_OPENGL) && !defined(MBGL_LAYER_LOCATION_INDICATOR_DISABLE_ALL)
#include <mbgl/style/layers/location_indicator_layer.hpp>
namespace {
const std::string mbglPuckAssetsPath{MAPBOX_PUCK_ASSETS_PATH};
mbgl::Color premultiply(mbgl::Color c) {
c.r *= c.a;
c.g *= c.a;
c.b *= c.a;
return c;
}
std::array<double, 3> toArray(const mbgl::LatLng &crd) {
return {crd.latitude(), crd.longitude(), 0};
}
} // namespace
#endif
class SnapshotObserver final : public mbgl::MapSnapshotterObserver {
public:
~SnapshotObserver() override = default;
void onDidFinishLoadingStyle() override {
MLN_TRACE_FUNC();
if (didFinishLoadingStyleCallback) {
didFinishLoadingStyleCallback();
}
}
std::function<void()> didFinishLoadingStyleCallback;
};
namespace {
void addFillExtrusionLayer(mbgl::style::Style &style, bool visible) {
MLN_TRACE_FUNC();
using namespace mbgl::style;
using namespace mbgl::style::expression::dsl;
// Satellite-only style does not contain building extrusions data.
if (!style.getSource("composite")) {
return;
}
if (auto layer = style.getLayer("3d-buildings")) {
layer->setVisibility(VisibilityType(!visible));
return;
}
auto extrusionLayer = std::make_unique<FillExtrusionLayer>("3d-buildings", "composite");
extrusionLayer->setSourceLayer("building");
extrusionLayer->setMinZoom(15.0f);
extrusionLayer->setFilter(Filter(eq(get("extrude"), literal("true"))));
extrusionLayer->setFillExtrusionColor(PropertyExpression<mbgl::Color>(interpolate(linear(),
number(get("height")),
0.f,
toColor(literal("#160e23")),
50.f,
toColor(literal("#00615f")),
100.f,
toColor(literal("#55e9ff")))));
extrusionLayer->setFillExtrusionOpacity(0.6f);
extrusionLayer->setFillExtrusionHeight(PropertyExpression<float>(get("height")));
extrusionLayer->setFillExtrusionBase(PropertyExpression<float>(get("min_height")));
style.addLayer(std::move(extrusionLayer));
}
} // namespace
void glfwError(int error, const char *description) {
mbgl::Log::Error(mbgl::Event::OpenGL, std::string("GLFW error (") + std::to_string(error) + "): " + description);
}
GLFWView::GLFWView(bool fullscreen_,
bool benchmark_,
const mbgl::ResourceOptions &resourceOptions,
const mbgl::ClientOptions &clientOptions)
: fullscreen(fullscreen_),
benchmark(benchmark_),
snapshotterObserver(std::make_unique<SnapshotObserver>()),
mapResourceOptions(resourceOptions.clone()),
mapClientOptions(clientOptions.clone()) {
MLN_TRACE_FUNC();
glfwSetErrorCallback(glfwError);
std::srand(static_cast<unsigned int>(std::time(nullptr)));
if (!glfwInit()) {
mbgl::Log::Error(mbgl::Event::OpenGL, "failed to initialize glfw");
exit(1);
}
GLFWmonitor *monitor = nullptr;
if (fullscreen) {
monitor = glfwGetPrimaryMonitor();
auto videoMode = glfwGetVideoMode(monitor);
width = videoMode->width;
height = videoMode->height;
}
#if __APPLE__
glfwWindowHint(GLFW_COCOA_RETINA_FRAMEBUFFER, GL_TRUE);
#endif
if (mbgl::gfx::Backend::GetType() != mbgl::gfx::Backend::Type::OpenGL) {
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
} else {
#if __APPLE__
glfwWindowHint(GLFW_COCOA_GRAPHICS_SWITCHING, GL_TRUE);
#endif
#if MBGL_WITH_EGL
glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_EGL_CONTEXT_API);
#endif
#ifdef DEBUG
glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE);
#endif
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
glfwWindowHint(GLFW_RED_BITS, 8);
glfwWindowHint(GLFW_GREEN_BITS, 8);
glfwWindowHint(GLFW_BLUE_BITS, 8);
glfwWindowHint(GLFW_ALPHA_BITS, 8);
glfwWindowHint(GLFW_STENCIL_BITS, 8);
glfwWindowHint(GLFW_DEPTH_BITS, 16);
}
window = glfwCreateWindow(width, height, "MapLibre Native", monitor, nullptr);
if (!window) {
glfwTerminate();
mbgl::Log::Error(mbgl::Event::OpenGL, "failed to initialize window");
exit(1);
}
glfwSetWindowUserPointer(window, this);
glfwSetCursorPosCallback(window, onMouseMove);
glfwSetMouseButtonCallback(window, onMouseClick);
glfwSetWindowSizeCallback(window, onWindowResize);
glfwSetFramebufferSizeCallback(window, onFramebufferResize);
glfwSetScrollCallback(window, onScroll);
glfwSetKeyCallback(window, onKey);
glfwSetWindowFocusCallback(window, onWindowFocus);
glfwGetWindowSize(window, &width, &height);
bool capFrameRate = !benchmark; // disable VSync in benchmark mode
backend = GLFWBackend::Create(window, capFrameRate);
#ifdef __APPLE__
int fbW, fbH;
glfwGetFramebufferSize(window, &fbW, &fbH);
backend->setSize({static_cast<uint32_t>(fbW), static_cast<uint32_t>(fbH)});
#endif
pixelRatio = static_cast<float>(backend->getSize().width) / width;
glfwMakeContextCurrent(nullptr);
printf("\n");
printf(
"======================================================================"
"==========\n");
printf("\n");
printf("- Press `S` to cycle through bundled styles\n");
printf("- Press `X` to reset the transform\n");
printf("- Press `N` to reset north\n");
printf("- Press `R` to enable the route demo\n");
printf("- Press `E` to insert an example building extrusion layer\n");
printf("- Press `O` to toggle online connectivity\n");
printf("- Press `Z` to cycle through north orientations\n");
printf("- Press `X` to cycle through the viewport modes\n");
printf("- Press `I` to delete existing database and re-initialize\n");
printf(
"- Press `A` to cycle through Mapbox offices in the world + dateline "
"monument\n");
printf("- Press `B` to cycle through the color, stencil, and depth buffer\n");
printf(
"- Press `D` to cycle through camera bounds: inside, crossing IDL at "
"left, crossing IDL at right, and "
"disabled\n");
printf("- Press `T` to add custom geometry source\n");
printf("- Press `F` to enable feature-state demo\n");
printf("- Press `U` to toggle pitch bounds\n");
printf("- Press `H` to take a snapshot of a current map.\n");
printf(
"- Press `J` to take a snapshot of a current map with an extrusions "
"overlay.\n");
printf("- Press `Y` to start a camera fly-by demo\n");
printf("\n");
printf(
"- Press `1` through `6` to add increasing numbers of point "
"annotations for testing\n");
printf(
"- Press `7` through `0` to add increasing numbers of shape "
"annotations for testing\n");
printf("\n");
printf("- Press `Q` to query annotations\n");
printf("- Press `C` to remove annotations\n");
printf("- Press `K` to add a random custom runtime imagery annotation\n");
printf("- Press `L` to add a random line annotation\n");
printf("- Press `W` to pop the last-added annotation off\n");
printf("- Press `P` to pause tile requests\n");
printf("\n");
printf("- Hold `Control` + mouse drag to rotate\n");
printf("- Hold `Shift` + mouse drag to tilt\n");
printf("\n");
printf("- Press `F1` to generate a render test for the current view\n");
printf("\n");
printf("- Press `Tab` to cycle through the map debug options\n");
printf("- Press `Esc` to quit\n");
printf("\n");
printf(
"======================================================================"
"==========\n");
printf("\n");
}
GLFWView::~GLFWView() {
MLN_TRACE_FUNC();
glfwDestroyWindow(window);
glfwTerminate();
}
void GLFWView::setMap(mbgl::Map *map_) {
MLN_TRACE_FUNC();
map = map_;
map->addAnnotationImage(makeImage("default_marker", 22, 22, 1));
}
void GLFWView::setRenderFrontend(GLFWRendererFrontend *rendererFrontend_) {
MLN_TRACE_FUNC();
rendererFrontend = rendererFrontend_;
}
mbgl::gfx::RendererBackend &GLFWView::getRendererBackend() {
MLN_TRACE_FUNC();
return backend->getRendererBackend();
}
void GLFWView::onKey(GLFWwindow *window, int key, int /*scancode*/, int action, int mods) {
MLN_TRACE_FUNC();
auto *view = reinterpret_cast<GLFWView *>(glfwGetWindowUserPointer(window));
if (action == GLFW_RELEASE) {
if (key != GLFW_KEY_R || key != GLFW_KEY_S) view->animateRouteCallback = nullptr;
switch (key) {
case GLFW_KEY_ESCAPE:
glfwSetWindowShouldClose(window, true);
break;
case GLFW_KEY_TAB:
view->cycleDebugOptions();
break;
case GLFW_KEY_X:
if (!mods)
view->map->jumpTo(
mbgl::CameraOptions().withCenter(mbgl::LatLng{}).withZoom(0.0).withBearing(0.0).withPitch(0.0));
break;
case GLFW_KEY_O:
view->onlineStatusCallback();
break;
case GLFW_KEY_S:
if (view->changeStyleCallback) view->changeStyleCallback();
break;
case GLFW_KEY_N:
if (!mods)
view->map->easeTo(mbgl::CameraOptions().withBearing(0.0),
mbgl::AnimationOptions{{mbgl::Milliseconds(500)}});
break;
case GLFW_KEY_Z:
view->nextOrientation();
break;
case GLFW_KEY_Q: {
auto result = view->rendererFrontend->getRenderer()->queryPointAnnotations(
{{}, {static_cast<double>(view->getSize().width), static_cast<double>(view->getSize().height)}});
printf("visible point annotations: %zu\n", result.size());
auto features = view->rendererFrontend->getRenderer()->queryRenderedFeatures(
mbgl::ScreenBox{{view->getSize().width * 0.5, view->getSize().height * 0.5},
{view->getSize().width * 0.5 + 1.0, view->getSize().height * 0.5 + 1}},
{});
printf("Rendered features at the center of the screen: %zu\n", features.size());
} break;
case GLFW_KEY_P:
view->pauseResumeCallback();
break;
case GLFW_KEY_C:
view->clearAnnotations();
break;
case GLFW_KEY_I:
view->resetDatabaseCallback();
break;
case GLFW_KEY_K:
view->addRandomCustomPointAnnotations(1);
break;
case GLFW_KEY_L:
view->addRandomLineAnnotations(1);
break;
case GLFW_KEY_A: {
// XXX Fix precision loss in flyTo:
// https://github.com/mapbox/mapbox-gl-native/issues/4298
static const std::vector<mbgl::LatLng> places = {
mbgl::LatLng{-16.796665, -179.999983}, // Dateline monument
mbgl::LatLng{12.9810542, 77.6345551}, // Mapbox Bengaluru, India
mbgl::LatLng{-13.15607, -74.21773}, // Mapbox Peru
mbgl::LatLng{37.77572, -122.4158818}, // Mapbox SF, USA
mbgl::LatLng{38.91318, -77.03255}, // Mapbox DC, USA
};
static size_t nextPlace = 0;
mbgl::CameraOptions cameraOptions;
cameraOptions.center = places[nextPlace++];
cameraOptions.zoom = 20;
cameraOptions.pitch = 30;
mbgl::AnimationOptions animationOptions(mbgl::Seconds(10));
view->map->flyTo(cameraOptions, animationOptions);
nextPlace = nextPlace % places.size();
} break;
case GLFW_KEY_R: {
view->show3DExtrusions = true;
view->toggle3DExtrusions(view->show3DExtrusions);
if (view->animateRouteCallback) break;
view->animateRouteCallback = [](mbgl::Map *routeMap) {
static mapbox::cheap_ruler::CheapRuler ruler{40.7}; // New York
static mapbox::geojson::geojson route{mapbox::geojson::parse(mbgl::platform::glfw::route)};
const auto &geometry = route.get<mapbox::geometry::geometry<double>>();
const auto &lineString = geometry.get<mapbox::geometry::line_string<double>>();
static double routeDistance = ruler.lineDistance(lineString);
static double routeProgress = 0;
routeProgress += 0.0005;
if (routeProgress > 1.0) {
routeProgress = 0.0;
}
auto camera = routeMap->getCameraOptions();
auto point = ruler.along(lineString, routeProgress * routeDistance);
const mbgl::LatLng center{point.y, point.x};
auto latLng = *camera.center;
double bearing = ruler.bearing({latLng.longitude(), latLng.latitude()}, point);
double easing = bearing - *camera.bearing;
easing += easing > 180.0 ? -360.0 : easing < -180 ? 360.0 : 0;
bearing = *camera.bearing + (easing / 20);
routeMap->jumpTo(
mbgl::CameraOptions().withCenter(center).withZoom(18.0).withBearing(bearing).withPitch(60.0));
};
view->animateRouteCallback(view->map);
} break;
case GLFW_KEY_E:
view->toggle3DExtrusions(!view->show3DExtrusions);
break;
case GLFW_KEY_D: {
static const std::vector<mbgl::LatLngBounds> bounds = {
mbgl::LatLngBounds::hull(mbgl::LatLng{-45.0, -170.0}, mbgl::LatLng{45.0, 170.0}), // inside
mbgl::LatLngBounds::hull(mbgl::LatLng{-45.0, -200.0}, mbgl::LatLng{45.0, -160.0}), // left IDL
mbgl::LatLngBounds::hull(mbgl::LatLng{-45.0, 160.0}, mbgl::LatLng{45.0, 200.0}), // right IDL
mbgl::LatLngBounds()};
static size_t nextBound = 0u;
static mbgl::AnnotationID boundAnnotationID = std::numeric_limits<mbgl::AnnotationID>::max();
mbgl::LatLngBounds bound = bounds[nextBound++];
nextBound = nextBound % bounds.size();
view->map->setBounds(mbgl::BoundOptions().withLatLngBounds(bound));
if (bound == mbgl::LatLngBounds()) {
view->map->removeAnnotation(boundAnnotationID);
boundAnnotationID = std::numeric_limits<mbgl::AnnotationID>::max();
} else {
mbgl::Polygon<double> rect;
rect.push_back({
mbgl::Point<double>{bound.west(), bound.north()},
mbgl::Point<double>{bound.east(), bound.north()},
mbgl::Point<double>{bound.east(), bound.south()},
mbgl::Point<double>{bound.west(), bound.south()},
});
auto boundAnnotation = mbgl::FillAnnotation{
rect, 0.5f, {view->makeRandomColor()}, {view->makeRandomColor()}};
if (boundAnnotationID == std::numeric_limits<mbgl::AnnotationID>::max()) {
boundAnnotationID = view->map->addAnnotation(boundAnnotation);
} else {
view->map->updateAnnotation(boundAnnotationID, boundAnnotation);
}
}
} break;
case GLFW_KEY_T:
view->toggleCustomSource();
break;
case GLFW_KEY_F: {
using namespace mbgl;
using namespace mbgl::style;
using namespace mbgl::style::expression::dsl;
auto &style = view->map->getStyle();
if (!style.getSource("states")) {
std::string url =
"https://maplibre.org/maplibre-gl-js-docs/assets/"
"us_states.geojson";
auto source = std::make_unique<GeoJSONSource>("states");
source->setURL(url);
style.addSource(std::move(source));
mbgl::CameraOptions cameraOptions;
cameraOptions.center = mbgl::LatLng{42.619626, -103.523181};
cameraOptions.zoom = 3;
cameraOptions.pitch = 0;
cameraOptions.bearing = 0;
view->map->jumpTo(cameraOptions);
}
auto layer = style.getLayer("state-fills");
if (!layer) {
auto fillLayer = std::make_unique<FillLayer>("state-fills", "states");
fillLayer->setFillColor(mbgl::Color{0.0, 0.0, 1.0, 0.5});
fillLayer->setFillOpacity(PropertyExpression<float>(
createExpression(R"(["case", ["boolean", ["feature-state", "hover"], false], 1, 0.5])")));
style.addLayer(std::move(fillLayer));
} else {
layer->setVisibility(layer->getVisibility() == mbgl::style::VisibilityType::Visible
? mbgl::style::VisibilityType::None
: mbgl::style::VisibilityType::Visible);
}
layer = style.getLayer("state-borders");
if (!layer) {
auto borderLayer = std::make_unique<LineLayer>("state-borders", "states");
borderLayer->setLineColor(mbgl::Color{0.0, 0.0, 1.0, 1.0});
borderLayer->setLineWidth(PropertyExpression<float>(
createExpression(R"(["case", ["boolean", ["feature-state", "hover"], false], 2, 1])")));
style.addLayer(std::move(borderLayer));
} else {
layer->setVisibility(layer->getVisibility() == mbgl::style::VisibilityType::Visible
? mbgl::style::VisibilityType::None
: mbgl::style::VisibilityType::Visible);
}
} break;
case GLFW_KEY_F1: {
bool success = TestWriter()
.withInitialSize(mbgl::Size(view->width, view->height))
.withStyle(view->map->getStyle())
.withCameraOptions(view->map->getCameraOptions())
.write(view->testDirectory);
if (success) {
mbgl::Log::Info(mbgl::Event::General, "Render test created!");
} else {
mbgl::Log::Error(mbgl::Event::General,
"Fail to create render test! Base directory does not "
"exist or permission denied.");
}
} break;
case GLFW_KEY_U: {
auto bounds = view->map->getBounds();
if (bounds.minPitch == mbgl::util::rad2deg(mbgl::util::PITCH_MIN) &&
bounds.maxPitch == mbgl::util::rad2deg(mbgl::util::PITCH_MAX)) {
mbgl::Log::Info(mbgl::Event::General, "Limiting pitch bounds to [30, 40] degrees");
view->map->setBounds(mbgl::BoundOptions().withMinPitch(30).withMaxPitch(40));
} else {
mbgl::Log::Info(mbgl::Event::General, "Resetting pitch bounds to [0, 60] degrees");
view->map->setBounds(mbgl::BoundOptions().withMinPitch(0).withMaxPitch(60));
}
} break;
case GLFW_KEY_H: {
view->makeSnapshot();
} break;
case GLFW_KEY_J: {
// Snapshot with overlay
view->makeSnapshot(true);
} break;
case GLFW_KEY_G: {
view->toggleLocationIndicatorLayer();
} break;
case GLFW_KEY_Y: {
view->freeCameraDemoPhase = 0;
view->freeCameraDemoStartTime = mbgl::Clock::now();
view->invalidate();
} break;
}
}
if (action == GLFW_RELEASE || action == GLFW_REPEAT) {
switch (key) {
case GLFW_KEY_W:
view->popAnnotation();
break;
case GLFW_KEY_1:
view->addRandomPointAnnotations(1);
break;
case GLFW_KEY_2:
view->addRandomPointAnnotations(10);
break;
case GLFW_KEY_3:
view->addRandomPointAnnotations(100);
break;
case GLFW_KEY_4:
view->addRandomPointAnnotations(1000);
break;
case GLFW_KEY_5:
view->addRandomPointAnnotations(10000);
break;
case GLFW_KEY_6:
view->addRandomPointAnnotations(100000);
break;
case GLFW_KEY_7:
view->addRandomShapeAnnotations(1);
break;
case GLFW_KEY_8:
view->addRandomShapeAnnotations(10);
break;
case GLFW_KEY_9:
view->addRandomShapeAnnotations(100);
break;
case GLFW_KEY_0:
view->addRandomShapeAnnotations(1000);
break;
case GLFW_KEY_M:
view->addAnimatedAnnotation();
break;
}
}
}
namespace mbgl {
namespace util {
template <>
struct Interpolator<mbgl::LatLng> {
mbgl::LatLng operator()(const mbgl::LatLng &a, const mbgl::LatLng &b, const double t) {
return {
interpolate<double>(a.latitude(), b.latitude(), t),
interpolate<double>(a.longitude(), b.longitude(), t),
};
}
};
} // namespace util
} // namespace mbgl
void GLFWView::updateFreeCameraDemo() {
MLN_TRACE_FUNC();
const mbgl::LatLng trainStartPos = {60.171367, 24.941359};
const mbgl::LatLng trainEndPos = {60.185147, 24.936668};
const mbgl::LatLng cameraStartPos = {60.167443, 24.927176};
const mbgl::LatLng cameraEndPos = {60.185107, 24.933366};
const double cameraStartAlt = 1000.0;
const double cameraEndAlt = 150.0;
const double duration = 8.0;
// Interpolate between starting and ending points
std::chrono::duration<double> deltaTime = mbgl::Clock::now() - freeCameraDemoStartTime;
freeCameraDemoPhase = deltaTime.count() / duration;
auto trainPos = mbgl::util::interpolate(trainStartPos, trainEndPos, freeCameraDemoPhase);
auto cameraPos = mbgl::util::interpolate(cameraStartPos, cameraEndPos, freeCameraDemoPhase);
auto cameraAlt = mbgl::util::interpolate(cameraStartAlt, cameraEndAlt, freeCameraDemoPhase);
mbgl::FreeCameraOptions camera;
// Update camera position and focus point on the map with interpolated values
camera.setLocation({cameraPos, cameraAlt});
camera.lookAtPoint(trainPos);
map->setFreeCameraOptions(camera);
if (freeCameraDemoPhase > 1.0) {
freeCameraDemoPhase = -1.0;
}
}
mbgl::Color GLFWView::makeRandomColor() const {
const auto r = static_cast<float>(std::rand()) / static_cast<float>(RAND_MAX);
const auto g = static_cast<float>(std::rand()) / static_cast<float>(RAND_MAX);
const auto b = static_cast<float>(std::rand()) / static_cast<float>(RAND_MAX);
return {r, g, b, 1.0f};
}
mbgl::Point<double> GLFWView::makeRandomPoint() const {
const double x = width * static_cast<double>(std::rand()) / RAND_MAX;
const double y = height * static_cast<double>(std::rand()) / RAND_MAX;
mbgl::LatLng latLng = map->latLngForPixel({x, y});
return {latLng.longitude(), latLng.latitude()};
}
std::unique_ptr<mbgl::style::Image> GLFWView::makeImage(const std::string &id,
int width,
int height,
float pixelRatio) {
MLN_TRACE_FUNC();
const int r = static_cast<int>(255 * (static_cast<double>(std::rand()) / RAND_MAX));
const int g = static_cast<int>(255 * (static_cast<double>(std::rand()) / RAND_MAX));
const int b = static_cast<int>(255 * (static_cast<double>(std::rand()) / RAND_MAX));
const int w = static_cast<int>(std::ceil(pixelRatio * width));
const int h = static_cast<int>(std::ceil(pixelRatio * height));
mbgl::PremultipliedImage image({static_cast<uint32_t>(w), static_cast<uint32_t>(h)});
auto data = reinterpret_cast<uint32_t *>(image.data.get());
const int dist = (w / 2) * (w / 2);
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
const int dx = x - w / 2;
const int dy = y - h / 2;
const int diff = dist - (dx * dx + dy * dy);
if (diff > 0) {
const int a = std::min(0xFF, diff) * 0xFF / dist;
// Premultiply the rgb values with alpha
data[w * y + x] = (a << 24) | ((a * r / 0xFF) << 16) | ((a * g / 0xFF) << 8) | (a * b / 0xFF);
}
}
}
return std::make_unique<mbgl::style::Image>(id, std::move(image), pixelRatio);
}
void GLFWView::nextOrientation() {
using NO = mbgl::NorthOrientation;
switch (map->getMapOptions().northOrientation()) {
case NO::Upwards:
map->setNorthOrientation(NO::Rightwards);
break;
case NO::Rightwards:
map->setNorthOrientation(NO::Downwards);
break;
case NO::Downwards:
map->setNorthOrientation(NO::Leftwards);
break;
default:
map->setNorthOrientation(NO::Upwards);
break;
}
}
void GLFWView::addRandomCustomPointAnnotations(int count) {
MLN_TRACE_FUNC();
for (int i = 0; i < count; i++) {
static int spriteID = 1;
const auto name = std::string{"marker-"} + mbgl::util::toString(spriteID++);
map->addAnnotationImage(makeImage(name, 22, 22, 1));
spriteIDs.push_back(name);
annotationIDs.push_back(map->addAnnotation(mbgl::SymbolAnnotation{makeRandomPoint(), name}));
}
}
void GLFWView::addRandomPointAnnotations(int count) {
MLN_TRACE_FUNC();
for (int i = 0; i < count; ++i) {
annotationIDs.push_back(map->addAnnotation(mbgl::SymbolAnnotation{makeRandomPoint(), "default_marker"}));
}
}
void GLFWView::addRandomLineAnnotations(int count) {
MLN_TRACE_FUNC();
for (int i = 0; i < count; ++i) {
mbgl::LineString<double> lineString;
for (int j = 0; j < 3; ++j) {
lineString.push_back(makeRandomPoint());
}
annotationIDs.push_back(map->addAnnotation(mbgl::LineAnnotation{lineString, 1.0f, 2.0f, {makeRandomColor()}}));
}
}
void GLFWView::addRandomShapeAnnotations(int count) {
MLN_TRACE_FUNC();
for (int i = 0; i < count; ++i) {
mbgl::Polygon<double> triangle;
triangle.push_back({makeRandomPoint(), makeRandomPoint(), makeRandomPoint()});
annotationIDs.push_back(
map->addAnnotation(mbgl::FillAnnotation{triangle, 0.5f, {makeRandomColor()}, {makeRandomColor()}}));
}
}
void GLFWView::addAnimatedAnnotation() {
MLN_TRACE_FUNC();
const double started = glfwGetTime();
animatedAnnotationIDs.push_back(map->addAnnotation(mbgl::SymbolAnnotation{{0, 0}, "default_marker"}));
animatedAnnotationAddedTimes.push_back(started);
}
void GLFWView::updateAnimatedAnnotations() {
MLN_TRACE_FUNC();
const double time = glfwGetTime();
for (size_t i = 0; i < animatedAnnotationIDs.size(); i++) {
auto dt = time - animatedAnnotationAddedTimes[i];
const double period = 10;
const double x = dt / period * 360 - 180;
const double y = std::sin(dt / period * pi * 2.0) * 80;
map->updateAnnotation(animatedAnnotationIDs[i], mbgl::SymbolAnnotation{{x, y}, "default_marker"});
}
}
void GLFWView::cycleDebugOptions() {
auto debug = map->getDebug();
if (debug & mbgl::MapDebugOptions::Overdraw)
debug = mbgl::MapDebugOptions::NoDebug;
else if (debug & mbgl::MapDebugOptions::Collision)
debug = mbgl::MapDebugOptions::Overdraw;
else if (debug & mbgl::MapDebugOptions::Timestamps)
debug = debug | mbgl::MapDebugOptions::Collision;
else if (debug & mbgl::MapDebugOptions::ParseStatus)
debug = debug | mbgl::MapDebugOptions::Timestamps;
else if (debug & mbgl::MapDebugOptions::TileBorders)
debug = debug | mbgl::MapDebugOptions::ParseStatus;
else
debug = mbgl::MapDebugOptions::TileBorders;
map->setDebug(debug);
}
void GLFWView::clearAnnotations() {
MLN_TRACE_FUNC();
for (const auto &id : annotationIDs) {
map->removeAnnotation(id);
}
annotationIDs.clear();
for (const auto &id : animatedAnnotationIDs) {
map->removeAnnotation(id);
}
animatedAnnotationIDs.clear();
}
void GLFWView::popAnnotation() {
if (annotationIDs.empty()) {
return;
}
map->removeAnnotation(annotationIDs.back());
annotationIDs.pop_back();
}
void GLFWView::makeSnapshot(bool withOverlay) {
MLN_TRACE_FUNC();
if (!snapshotter || snapshotter->getStyleURL() != map->getStyle().getURL()) {
snapshotter = std::make_unique<mbgl::MapSnapshotter>(map->getMapOptions().size(),
map->getMapOptions().pixelRatio(),
mapResourceOptions,
mapClientOptions,
*snapshotterObserver);
snapshotter->setStyleURL(map->getStyle().getURL());
}
auto snapshot = [&] {
snapshotter->setCameraOptions(map->getCameraOptions());
snapshotter->snapshot([](const std::exception_ptr &ptr,
mbgl::PremultipliedImage image,
const mbgl::MapSnapshotter::Attributions &,
const mbgl::MapSnapshotter::PointForFn &,
const mbgl::MapSnapshotter::LatLngForFn &) {
if (!ptr) {
std::ostringstream oss;
oss << "Made snapshot './snapshot.png' with size w:" << image.size.width << "px h:" << image.size.height
<< "px";
mbgl::Log::Info(mbgl::Event::General, oss.str());
std::ofstream file("./snapshot.png");
file << mbgl::encodePNG(image);
} else {
mbgl::Log::Error(mbgl::Event::General, "Failed to make a snapshot!");
}
});
};
if (withOverlay) {
snapshotterObserver->didFinishLoadingStyleCallback = [&] {
addFillExtrusionLayer(snapshotter->getStyle(), withOverlay);
snapshot();
};
} else {
snapshot();
}
}
void GLFWView::onScroll(GLFWwindow *window, double /*xOffset*/, double yOffset) {
MLN_TRACE_FUNC();
auto *view = reinterpret_cast<GLFWView *>(glfwGetWindowUserPointer(window));
double delta = yOffset * 40;
bool isWheel = delta != 0 && std::fmod(delta, 4.000244140625) == 0;
double absDelta = delta < 0 ? -delta : delta;
double scale = 2.0 / (1.0 + std::exp(-absDelta / 100.0));
// Make the scroll wheel a bit slower.
if (!isWheel) {
scale = (scale - 1.0) / 2.0 + 1.0;
}
// Zooming out.
if (delta < 0 && scale != 0) {
scale = 1.0 / scale;
}
view->map->scaleBy(scale, mbgl::ScreenCoordinate{view->lastX, view->lastY});
#if defined(MLN_RENDER_BACKEND_OPENGL) && !defined(MBGL_LAYER_CUSTOM_DISABLE_ALL)
if (view->puck && view->puckFollowsCameraCenter) {
mbgl::LatLng mapCenter = view->map->getCameraOptions().center.value();
view->puck->setLocation(toArray(mapCenter));
}
#endif
}
void GLFWView::onWindowResize(GLFWwindow *window, int width, int height) {
MLN_TRACE_FUNC();
auto *view = reinterpret_cast<GLFWView *>(glfwGetWindowUserPointer(window));
view->width = width;
view->height = height;
view->map->setSize({static_cast<uint32_t>(view->width), static_cast<uint32_t>(view->height)});
#ifdef __APPLE__
int fbW, fbH;
glfwGetFramebufferSize(window, &fbW, &fbH);
view->backend->setSize({static_cast<uint32_t>(fbW), static_cast<uint32_t>(fbH)});
#endif
}
void GLFWView::onFramebufferResize(GLFWwindow *window, int width, int height) {
MLN_TRACE_FUNC();
auto *view = reinterpret_cast<GLFWView *>(glfwGetWindowUserPointer(window));
view->backend->setSize({static_cast<uint32_t>(width), static_cast<uint32_t>(height)});
// This is only triggered when the framebuffer is resized, but not the
// window. It can happen when you move the window between screens with a
// different pixel ratio. We are forcing a repaint my invalidating the view,
// which triggers a rerender with the new framebuffer dimensions.
view->invalidate();
}
void GLFWView::onMouseClick(GLFWwindow *window, int button, int action, int modifiers) {
MLN_TRACE_FUNC();
auto *view = reinterpret_cast<GLFWView *>(glfwGetWindowUserPointer(window));
if (button == GLFW_MOUSE_BUTTON_RIGHT || (button == GLFW_MOUSE_BUTTON_LEFT && modifiers & GLFW_MOD_CONTROL)) {
view->rotating = action == GLFW_PRESS;
view->map->setGestureInProgress(view->rotating);
} else if (button == GLFW_MOUSE_BUTTON_LEFT && (modifiers & GLFW_MOD_SHIFT)) {
view->pitching = action == GLFW_PRESS;
view->map->setGestureInProgress(view->pitching);
} else if (button == GLFW_MOUSE_BUTTON_LEFT) {
view->tracking = action == GLFW_PRESS;
view->map->setGestureInProgress(view->tracking);
if (action == GLFW_RELEASE) {
double now = glfwGetTime();
if (now - view->lastClick < 0.4 /* ms */) {
if (modifiers & GLFW_MOD_SHIFT) {
view->map->scaleBy(0.5,
mbgl::ScreenCoordinate{view->lastX, view->lastY},
mbgl::AnimationOptions{{mbgl::Milliseconds(500)}});
} else {
view->map->scaleBy(2.0,
mbgl::ScreenCoordinate{view->lastX, view->lastY},
mbgl::AnimationOptions{{mbgl::Milliseconds(500)}});
}
}
view->lastClick = now;
}
}
}
void GLFWView::onMouseMove(GLFWwindow *window, double x, double y) {
MLN_TRACE_FUNC();
auto *view = reinterpret_cast<GLFWView *>(glfwGetWindowUserPointer(window));
if (view->tracking) {
const double dx = x - view->lastX;
const double dy = y - view->lastY;
if (dx || dy) {
view->map->moveBy(mbgl::ScreenCoordinate{dx, dy});
}
} else if (view->rotating) {
view->map->rotateBy({view->lastX, view->lastY}, {x, y});
} else if (view->pitching) {
const double dy = y - view->lastY;
if (dy) {
view->map->pitchBy(dy / 2);
}
}
view->lastX = x;
view->lastY = y;
#if defined(MLN_RENDER_BACKEND_OPENGL) && !defined(MBGL_LAYER_CUSTOM_DISABLE_ALL)
if (view->puck && view->puckFollowsCameraCenter) {
mbgl::LatLng mapCenter = view->map->getCameraOptions().center.value();
view->puck->setLocation(toArray(mapCenter));
}
#endif
auto &style = view->map->getStyle();
if (style.getLayer("state-fills")) {
auto screenCoordinate = mbgl::ScreenCoordinate{view->lastX, view->lastY};
const mbgl::RenderedQueryOptions queryOptions({{{"state-fills"}}, {}});
auto result = view->rendererFrontend->getRenderer()->queryRenderedFeatures(screenCoordinate, queryOptions);
using namespace mbgl;
FeatureState newState;
if (!result.empty()) {
FeatureIdentifier id = result[0].id;
std::optional<std::string> idStr = featureIDtoString(id);
if (idStr) {
if (view->featureID && (*view->featureID != *idStr)) {
newState["hover"] = false;
view->rendererFrontend->getRenderer()->setFeatureState("states", {}, *view->featureID, newState);
view->featureID = std::nullopt;
}
if (!view->featureID) {
newState["hover"] = true;
view->featureID = featureIDtoString(id);