Add SVGPanel

include/app.hpp

@@ -121,6 +121,14 @@ struct Panel : TransparentWidget {
 	void draw(NVGcontext *vg);
 };
 
+struct PanelBorder : TransparentWidget {
+	void draw(NVGcontext *vg);
+};
+
+struct SVGPanel : FramebufferWidget {
+	void addBackground(std::shared_ptr<SVG> svg);
+};
+
 ////////////////////
 // params
 ////////////////////

include/widgets.hpp

@@ -198,6 +198,7 @@ struct FramebufferWidget : virtual Widget {
 	This prevents cutting the rendered SVG off on the box edges.
 	*/
 	Vec padding;
+	float oversample = 2.0;
 	/** The root object in the framebuffer scene
 	The FramebufferWidget owns the pointer
 	*/

src/app/PanelBorder.cpp

@@ -0,0 +1,20 @@
+#include "app.hpp"
+
+
+namespace rack {
+
+void PanelBorder::draw(NVGcontext *vg) {
+	nvgBeginPath(vg);
+	nvgRect(vg, 0.0, 0.0, box.size.x, box.size.y);
+
+	NVGcolor borderColor = nvgRGB(0xac, 0xac, 0xac);
+
+	// Border
+	nvgBeginPath(vg);
+	nvgRect(vg, 0.5, 0.5, box.size.x - 1, box.size.y - 1);
+	nvgStrokeColor(vg, borderColor);
+	nvgStrokeWidth(vg, 1.0);
+	nvgStroke(vg);
+}
+
+} // namespace rack

src/app/SVGPanel.cpp

@@ -0,0 +1,19 @@
+#include "app.hpp"
+
+
+namespace rack {
+
+
+void SVGPanel::addBackground(std::shared_ptr<SVG> svg) {
+	SVGWidget *sw = new SVGWidget();
+	sw->wrap();
+	sw->svg = svg;
+	addChild(sw);
+
+	PanelBorder *pb = new PanelBorder();
+	sw->box.size = box.size;
+	addChild(pb);
+}
+
+
+} // namespace rack

src/widgets/FramebufferWidget.cpp

@@ -39,7 +39,7 @@ void FramebufferWidget::step() {
 	if (dirty) {
 		internal->box.pos = padding.neg();
 		internal->box.size = box.size.plus(padding.mult(2));
-		Vec fbSize = internal->box.size.mult(gPixelRatio);
+		Vec fbSize = internal->box.size.mult(gPixelRatio * oversample);
 		// assert(fbSize.isFinite());
 
 		internal->setFramebuffer(NULL);
@@ -54,7 +54,7 @@ void FramebufferWidget::step() {
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
 		nvgBeginFrame(gVg, fbSize.x, fbSize.y, gPixelRatio);
 
-		nvgScale(gVg, gPixelRatio, gPixelRatio);
+		nvgScale(gVg, gPixelRatio * oversample, gPixelRatio * oversample);
 		nvgTranslate(gVg, padding.x, padding.y);
 		Widget::draw(gVg);