1 files changed, 305 insertions, 0 deletions
diff --git a/libsowatch/watchpaintengine.cpp b/libsowatch/watchpaintengine.cpp
new file mode 100644
index 0000000..18cfb60
--- /dev/null
+++ b/libsowatch/watchpaintengine.cpp
@@ -0,0 +1,305 @@
+#include <QtCore/QDebug>
+#include <math.h>
+
+#include "watch.h"
+#include "watchpaintengine.h"
+
+using namespace sowatch;
+
+WatchPaintEngine::WatchPaintEngine(Watch* watch, QImage* image)
+	: QPaintEngine(QPaintEngine::AllFeatures),
+	  _watch(watch), _painter(),
+	  _hasPen(false), _hasBrush(false), _clipEnabled(false)
+{
+	Q_UNUSED(image);
+}
+
+bool WatchPaintEngine::begin(QPaintDevice *pdev)
+{
+	_damaged = QRegion();
+	_watch = static_cast<Watch*>(pdev);
+
+	return _painter.begin(&_watch->_image);
+}
+
+bool WatchPaintEngine::end()
+{
+	bool ret = _painter.end();
+	if (ret) {
+		_watch->update(_damaged.rects().toList());
+	}
+	return ret;
+}
+
+void WatchPaintEngine::damageMappedRect(const QRect &r)
+{
+	if (_clipEnabled) {
+		_damaged += _clipRegion.intersected(r);
+	} else {
+		_damaged += r;
+	}
+}
+
+void WatchPaintEngine::damageRect(const QRect &r)
+{
+	damageMappedRect(_transform.mapRect(r));
+}
+
+void WatchPaintEngine::damageRect(const QRectF &r)
+{
+	damageMappedRect(_transform.mapRect(r).toRect());
+}
+
+void WatchPaintEngine::damagePenStroke(const QLineF &line)
+{
+	if (!_hasPen) return;
+
+	const qreal a = line.angle();
+	const qreal sn = sinf(a);
+	const qreal cs = cosf(a);
+	const qreal w = _penWidth = 0.0 ? 1.0 : _penWidth;
+	const qreal x1 = line.x1();
+	const qreal x2 = line.x2();
+	const qreal y1 = line.x1();
+	const qreal y2 = line.y2();
+
+	damageRect(QRectF(x1-(w*sn/2.0f), y1+(w*cs/2.0f), x2+(w*sn/2.0f), y2-(w*cs/2.0f)).normalized());
+}
+
+void WatchPaintEngine::updateClipRegion(const QRegion& region, Qt::ClipOperation op)
+{
+	switch(op) {
+		case Qt::NoClip:
+			_clipEnabled = false;
+			_clipRegion = QRegion(0, 0, _watch->width(), _watch->height());
+			break;
+		case Qt::ReplaceClip:
+			_clipEnabled = true;
+			_clipRegion = region;
+			break;
+		case Qt::IntersectClip:
+			_clipEnabled = true;
+			_clipRegion &= region;
+			break;
+		case Qt::UniteClip:
+			_clipEnabled = true;
+			_clipRegion |= region;
+			break;
+	}
+}
+
+void WatchPaintEngine::drawEllipse(const QRectF &r)
+{
+	damageRect(r);
+	_painter.drawEllipse(r);
+}
+
+void WatchPaintEngine::drawEllipse(const QRect &r)
+{
+	damageRect(r);
+	_painter.drawEllipse(r);
+}
+
+void WatchPaintEngine::drawImage(const QRectF &r, const QImage &pm, const QRectF &sr, Qt::ImageConversionFlags flags)
+{
+	damageRect(r);
+	_painter.drawImage(r, pm, sr, flags);
+}
+
+void WatchPaintEngine::drawLines(const QLineF *lines, int lineCount)
+{
+	int i;
+	for (i = 0; i < lineCount; i++) {
+		const QLineF& line = lines[i];
+		damagePenStroke(line);
+	}
+	_painter.drawLines(lines, lineCount);
+}
+
+void WatchPaintEngine::drawLines(const QLine *lines, int lineCount)
+{
+	int i;
+	for (i = 0; i < lineCount; i++) {
+		const QLine& line = lines[i];
+		damagePenStroke(line);
+	}
+	_painter.drawLines(lines, lineCount);
+}
+
+void WatchPaintEngine::drawPath(const QPainterPath &path)
+{
+	damageRect(path.boundingRect());
+	_painter.drawPath(path);
+}
+
+void WatchPaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
+{
+	damageRect(r);
+	_painter.drawPixmap(r, pm, sr);
+}
+
+void WatchPaintEngine::drawPoints(const QPointF *points, int pointCount)
+{
+	const qreal penWidth = _painter.pen().widthF();
+	int i;
+	for (i = 0; i < pointCount; i++) {
+		const QPointF& p = points[i];
+		damageRect(QRect(p.x() - penWidth/2, p.y() - penWidth/2,
+						 p.x() + penWidth/2, p.y() + penWidth/2));
+	}
+	_painter.drawPoints(points, pointCount);
+}
+
+void WatchPaintEngine::drawPoints(const QPoint *points, int pointCount)
+{
+	const qreal penWidth = _painter.pen().widthF();
+	int i;
+	for (i = 0; i < pointCount; i++) {
+		const QPoint& p = points[i];
+		damageRect(QRect(p.x() - penWidth/2, p.y() - penWidth/2,
+						 p.x() + penWidth/2, p.y() + penWidth/2));
+	}
+	_painter.drawPoints(points, pointCount);
+}
+
+void WatchPaintEngine::drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode)
+{
+	QPolygonF p(pointCount);
+	int i;
+	for (i = 0; i < pointCount; i++) {
+		p[i] = points[i];
+	}
+	damageRect(p.boundingRect());
+	_painter.drawPolygon(points, pointCount,
+						 mode == WindingMode ? Qt::WindingFill : Qt::OddEvenFill);
+}
+
+void WatchPaintEngine::drawPolygon(const QPoint *points, int pointCount, PolygonDrawMode mode)
+{
+	QPolygon p(pointCount);
+	int i;
+	for (i = 0; i < pointCount; i++) {
+		p[i] = points[i];
+	}
+	damageRect(p.boundingRect());
+	_painter.drawPolygon(points, pointCount,
+						 mode == WindingMode ? Qt::WindingFill : Qt::OddEvenFill);
+}
+
+void WatchPaintEngine::drawRects(const QRectF *rects, int rectCount)
+{
+	int i;
+	for (i = 0; i < rectCount; i++) {
+		const QRectF& r = rects[i];
+		if (_hasBrush) {
+			damageRect(r);
+		}
+		if (_hasPen) {
+			damagePenStroke(QLineF(r.left(), r.top(), r.right(), r.top()));
+			damagePenStroke(QLineF(r.right(), r.top(), r.right(), r.bottom()));
+			damagePenStroke(QLineF(r.left(), r.bottom(), r.right(), r.bottom()));
+			damagePenStroke(QLineF(r.left(), r.top(), r.left(), r.bottom()));
+		}
+	}
+	_painter.drawRects(rects, rectCount);
+}
+
+void WatchPaintEngine::drawRects(const QRect *rects, int rectCount)
+{
+	int i;
+	for (i = 0; i < rectCount; i++) {
+		const QRect& r = rects[i];
+		if (_hasBrush) {
+			damageRect(r);
+		}
+		if (_hasPen) {
+			damagePenStroke(QLine(r.left(), r.top(), r.right(), r.top()));
+			damagePenStroke(QLine(r.right(), r.top(), r.right(), r.bottom()));
+			damagePenStroke(QLine(r.left(), r.bottom(), r.right(), r.bottom()));
+			damagePenStroke(QLine(r.left(), r.top(), r.left(), r.bottom()));
+		}
+	}
+
+	_painter.drawRects(rects, rectCount);
+}
+
+void WatchPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)
+{
+	const qreal height = textItem.ascent() + textItem.descent();
+	damageRect(QRect(p.x(), p.y(), p.x() + textItem.width(), p.y() + height));
+	_painter.drawTextItem(p, textItem);
+}
+
+void WatchPaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s)
+{
+	damageRect(r);
+	_painter.drawTiledPixmap(r, pixmap, s);
+}
+
+QPaintEngine::Type WatchPaintEngine::type() const
+{
+	return QPaintEngine::Raster;
+}
+
+void WatchPaintEngine::updateState(const QPaintEngineState &state)
+{
+	const QPaintEngine::DirtyFlags flags = state.state();
+	if (flags & QPaintEngine::DirtyBackground)
+	{
+		_painter.setBackground(state.backgroundBrush());
+	}
+	if (flags & QPaintEngine::DirtyBackgroundMode)
+	{
+		_painter.setBackgroundMode(state.backgroundMode());
+	}
+	if (flags & QPaintEngine::DirtyBrush)
+	{
+		QBrush brush = state.brush();
+		_hasBrush = brush.style() != Qt::NoBrush;
+		_painter.setBrush(brush);
+	}
+	if (flags & QPaintEngine::DirtyBrushOrigin)
+	{
+		_painter.setBrushOrigin(state.brushOrigin());
+	}
+	if (flags & QPaintEngine::DirtyClipEnabled)
+	{
+		_clipEnabled = state.isClipEnabled();
+		_painter.setClipping(_clipEnabled);
+	}
+	if (flags & QPaintEngine::DirtyClipPath)
+	{
+		QRegion region = state.clipPath().boundingRect().toRect();
+		updateClipRegion(region, state.clipOperation());
+		_painter.setClipPath(state.clipPath(), state.clipOperation());
+	}
+	if (flags & QPaintEngine::DirtyClipRegion)
+	{
+		updateClipRegion(state.clipRegion(), state.clipOperation());
+		_painter.setClipRegion(state.clipRegion(), state.clipOperation());
+	}
+	if (flags & QPaintEngine::DirtyCompositionMode)
+	{
+		_painter.setCompositionMode(state.compositionMode());
+	}
+	if (flags & QPaintEngine::DirtyFont)
+	{
+		_painter.setFont(state.font());
+	}
+	if (flags & QPaintEngine::DirtyHints)
+	{
+		_painter.setRenderHints(state.renderHints());
+	}
+	if (flags & QPaintEngine::DirtyPen)
+	{
+		QPen pen = state.pen();
+		_hasPen = pen.style() != Qt::NoPen;
+		_penWidth = pen.widthF();
+		_painter.setPen(pen);
+	}
+	if (flags & QPaintEngine::DirtyTransform)
+	{
+		_transform = state.transform();
+		_painter.setTransform(_transform);
+	}
+}