void GraphNodeLink::draw(NVGcontext* ctx)
{
auto sourceSize = mSource->size().cast<float>();
Eigen::Vector2i inputPosition(
mSource->absolutePosition().x() - mParent->absolutePosition().x() + (sourceSize.x() * 0.5f),
mSource->absolutePosition().y() - mParent->absolutePosition().y() + (sourceSize.y() * 0.5f)
);
Eigen::Vector2i outputPosition(Eigen::Vector2i::Zero());
if (hasTarget()) {
// Get relative position of parent (node) of the target (sink)
Eigen::Vector2i delta = mSink->parent()->absolutePosition() - mSink->parent()->position();
delta.x() -= (sourceSize.x() * 0.5f);
delta.y() -= (sourceSize.y() * 0.5f);
outputPosition = mSink->absolutePosition() - delta;
}
else {
Eigen::Vector2i offset = mSource->absolutePosition() - mParent->absolutePosition();
Eigen::Vector2i delta = mTargetPosition - mSource->position();
outputPosition = offset + delta;
}
Eigen::Vector2i positionDiff = outputPosition - inputPosition;
NVGcontext* vg = ctx;
nvgStrokeColor(vg, nvgRGBA(131, 148, 150, 255));
nvgStrokeWidth(vg, 2.0f);
nvgBeginPath(vg);
nvgMoveTo(
vg,
inputPosition.x(),
inputPosition.y()
);
nvgQuadTo(vg,
1.2 * positionDiff.x(), positionDiff.y(),
outputPosition.x(), outputPosition.y()
);
nvgStroke(vg);
Widget::draw(ctx);
}
void NanoVG::quadTo( float cx, float cy, float x, float y )
{
nvgQuadTo( m_context(), cx, cy, x, y );
}
void QNanoPainter::quadTo(float cx, float cy, float x, float y)
{
_checkAlignPixelsAdjust(&cx, &cy, &x, &y);
nvgQuadTo(nvgCtx(), cx, cy, x, y);
}
void Shape::render(NVGcontext& nanoVgContext) const
{
switch(mType)
{
case Type::ARC:
{
const ArcInfo& info = mArcInfo;
const Point& position = info.position;
nvgArc(&nanoVgContext, position.getX(), position.getY(), info.radius, info.startAngle,
info.endAngle, info.clockWise ? NVG_CW : NVG_CCW);
}
break;
case Type::TRIANGLE:
{
const TriangleInfo& info = mTriangleInfo;
nvgMoveTo(&nanoVgContext, info.firstVertex.getX(), info.firstVertex.getY());
nvgLineTo(&nanoVgContext, info.secondVertex.getX(), info.secondVertex.getY());
nvgLineTo(&nanoVgContext, info.thirdVertex.getX(), info.thirdVertex.getY());
nvgClosePath(&nanoVgContext);
}
break;
case Type::RECT:
{
const RectInfo& info = mRectInfo;
const Rect& rect = info.rect;
if(info.rounded)
{
nvgRoundedRect(&nanoVgContext, rect.getX(), rect.getY(), rect.getWidth(),
rect.getHeight(), info.cornerRadius);
}
else
{
nvgRect(&nanoVgContext, rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight());
}
}
break;
case Type::ELLIPSE:
{
const EllipseInfo& info = mEllipseInfo;
const Point& position = info.position;
nvgEllipse(&nanoVgContext, position.getX(), position.getY(), info.horizontalRadius,
info.verticalRadius);
}
break;
case Type::MOVE_TO:
{
const MoveToInfo& info = mMoveToInfo;
const Point& position = info.position;
nvgMoveTo(&nanoVgContext, position.getX(), position.getY());
}
break;
case Type::LINE_TO:
{
const LineToInfo& info = mLineToInfo;
const Point& position = info.position;
nvgLineTo(&nanoVgContext, position.getX(), position.getY());
}
break;
case Type::BEZIER_TO:
{
const BezierToInfo& info = mBezierToInfo;
const Point& control1 = info.controlPosition1;
const Point& control2 = info.controlPosition2;
const Point& position = info.position;
nvgBezierTo(&nanoVgContext, control1.getX(), control1.getY(), control2.getX(),
control2.getY(), position.getX(), position.getY());
}
break;
case Type::QUAD_TO:
{
const QuadToInfo& info = mQuadToInfo;
const Point& control = info.controlPosition;
const Point& position = info.position;
nvgQuadTo(&nanoVgContext, control.getX(), control.getY(), position.getX(), position.getY());
}
break;
case Type::CLOSE_PATH:
{
nvgClosePath(&nanoVgContext);
}
break;
default:
return;
}
}
int main()
{
constexpr auto width = 1200u;
constexpr auto height = 800u;
// init ny app
auto& backend = ny::Backend::choose();
if(!backend.vulkan()) {
dlg_error("ny backend has no vulkan support!");
return 0;
}
auto ac = backend.createAppContext();
// basic vpp init
auto iniExtensions = ac->vulkanExtensions();
iniExtensions.push_back(VK_EXT_DEBUG_REPORT_EXTENSION_NAME);
vk::ApplicationInfo appInfo ("vpp-intro", 1, "vpp", 1, VK_API_VERSION_1_0);
vk::InstanceCreateInfo instanceInfo;
instanceInfo.pApplicationInfo = &appInfo;
instanceInfo.enabledExtensionCount = iniExtensions.size();
instanceInfo.ppEnabledExtensionNames = iniExtensions.data();
#ifdef WithLayers
constexpr auto layer = "VK_LAYER_LUNARG_standard_validation";
instanceInfo.enabledLayerCount = 1;
instanceInfo.ppEnabledLayerNames = &layer;
#endif
vpp::Instance instance(instanceInfo);
#ifdef WithLayers
vpp::DebugCallback debugCallback(instance);
#endif
// ny init
auto run = true;
auto listener = MyWindowListener {};
listener.run = &run;
auto vkSurface = vk::SurfaceKHR {};
auto ws = ny::WindowSettings {};
ws.surface = ny::SurfaceType::vulkan;
ws.listener = &listener;
ws.size = {width, height};
ws.vulkan.instance = (VkInstance) instance.vkHandle();
ws.vulkan.storeSurface = &(std::uintptr_t&) (vkSurface);
auto wc = ac->createWindowContext(ws);
// further vpp init
const vpp::Queue* presentQueue;
vpp::Device device(instance, vkSurface, presentQueue);
vpp::Swapchain swapchain(device, vkSurface, {width, height}, {});
// vvg setup
auto nvgContext = vvg::createContext(swapchain);
auto font = nvgCreateFont(nvgContext, "sans", "Roboto-Regular.ttf");
using Clock = std::chrono::high_resolution_clock;
auto lastFrameTimer = Clock::now();
unsigned int framesCount = 0;
std::string fpsString = "420 fps";
// main loop
while(run) {
if(!ac->dispatchEvents())
break;
nvgBeginFrame(nvgContext, width, height, width / (float) height);
nvgBeginPath(nvgContext);
nvgMoveTo(nvgContext, 10, 10);
nvgLineTo(nvgContext, 10, 400);
nvgLineTo(nvgContext, 100, 400);
nvgQuadTo(nvgContext, 100, 50, 400, 120);
nvgLineTo(nvgContext, 450, 10);
nvgClosePath(nvgContext);
nvgFillColor(nvgContext, nvgRGBAf(0.5, 0.8, 0.7, 1.0));
nvgFill(nvgContext);
nvgBeginPath(nvgContext);
nvgFontFaceId(nvgContext, font);
nvgFontSize(nvgContext, 100.f);
nvgFontBlur(nvgContext, .8f);
nvgFillColor(nvgContext, nvgRGBAf(1.0, 1.0, 1.0, 1.0));
nvgTextBox(nvgContext, 200, 200, width - 200, "Hello Vulkan Vector Graphics World", nullptr);
nvgFontSize(nvgContext, 30.f);
nvgFontBlur(nvgContext, .2f);
nvgText(nvgContext, 10, height - 20, fpsString.c_str(), nullptr);
nvgBeginPath(nvgContext);
nvgRect(nvgContext, 700, 400, 300, 300);
nvgPathWinding(nvgContext, NVG_HOLE);
nvgRect(nvgContext, 750, 450, 50, 50);
// auto paint = nvgRadialGradient(nvgContext, 750, 425,20, 50, nvgRGB(0, 0, 200), nvgRGB(200, 200, 0));
// auto paint = nvgRadialGradient(nvgContext, 0.0, 0.0, 0.2, 100.0, nvgRGB(0, 0, 200), nvgRGB(200, 200, 0));
auto paint = nvgLinearGradient(nvgContext, 700, 400, 800, 450, nvgRGB(0, 0, 200), nvgRGB(200, 200, 0));
nvgFillPaint(nvgContext, paint);
// nvgFillColor(nvgContext, nvgRGBA(200, 200, 0, 200));
nvgClosePath(nvgContext);
nvgFill(nvgContext);
nvgEndFrame(nvgContext);
// only refresh frame timer every second
framesCount++;
if(Clock::now() - lastFrameTimer >= std::chrono::seconds(1)) {
fpsString = std::to_string(framesCount) + " fps";
lastFrameTimer = Clock::now();
framesCount = 0;
}
}
vvg::destroyContext(*nvgContext);
}
JNIEXPORT void JNICALL Java_firststep_internal_NVG_quadTo
(JNIEnv *e, jclass c, jlong ctx, jfloat cx, jfloat cy, jfloat x, jfloat y)
{
nvgQuadTo((NVGcontext*)ctx, cx,cy, x,y);
}
void VectorRenderer::curveTo(float cx, float cy, float x, float y) {
nvgQuadTo(nvg, cx, cy, x, y);
}