public final void clear() {
Context2D context = getContext();
if (null != context) {
context.clearRect(0, 0, m_wide, m_high);
}
}
private final String getTextBestFit(final Context2D context, final String text, final int wide) {
double pt = LienzoCore.get().getDefaultFontSize();
String st = LienzoCore.get().getDefaultFontStyle();
String fm = LienzoCore.get().getDefaultFontFamily();
String tf = Text.getFontString(pt, TextUnit.PT, st, fm);
context.save();
context.setToIdentityTransform();
while (true) {
context.setTextFont(tf);
final TextMetrics tm = context.measureText(text);
if (tm.getWidth() < wide) {
break;
}
pt = pt - 2;
if (pt < 6) {
break;
}
tf = Text.getFontString(pt, TextUnit.PT, st, fm);
}
context.restore();
return tf;
}
/**
* Draws this ellipse.
*
* @param context the {@link Context2D} used to draw this ellipse.
*/
@Override
protected boolean prepare(final Context2D context, final Attributes attr, final double alpha) {
final double w = attr.getWidth();
final double h = attr.getHeight();
if ((w > 0) && (h > 0)) {
final double x = -(w / 2);
final double y = -(h / 2);
final double ox = (w / 2) * KAPPA; // control point offset horizontal
final double oy = (h / 2) * KAPPA; // control point offset vertical
final double xe = x + w; // x-end
final double ye = y + h; // y-end
final double xm = x + w / 2; // x-middle
final double ym = y + h / 2; // y-middle
context.beginPath();
context.moveTo(x, ym);
context.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y);
context.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym);
context.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye);
context.bezierCurveTo(xm - ox, ye, x, ym + oy, x, ym);
context.closePath();
return true;
}
return false;
}
/**
* Draws the frames of the video. If looping has been set, frames are drawn continuously in a
* loop.
*
* @param context
*/
@Override
protected boolean prepare(final Context2D context, final Attributes attr, final double alpha) {
if (m_inits) {
init();
if ((null == m_error) && (isAutoPlay())) {
play();
}
}
int wide = getWidth();
int high = getHeight();
if (null != m_error) {
if (false == context.isSelection()) {
if (wide < 1) {
wide = MOVIE_ERROR_WIDE;
}
if (high < 1) {
high = MOVIE_ERROR_HIGH;
}
context.save();
context.setFillColor(ColorName.BLACK);
context.rect(0, 0, wide, high);
context.fill();
context.setTextAlign(TextAlign.CENTER);
context.setTextBaseline(TextBaseLine.MIDDLE);
context.setTextFont(getTextBestFit(context, m_error, wide));
context.setFillColor(ColorName.WHITE);
context.rect(0, 0, wide, high);
context.clip();
context.fillText(m_error, wide / 2, high / 2);
context.restore();
}
} else {
if ((wide < 1) || (high < 1)) {
return false;
}
if (context.isSelection()) {
final String color = getColorKey();
if (null != color) {
context.save();
context.setFillColor(color);
context.fillRect(0, 0, wide, high);
context.restore();
}
return false;
}
if (isEnded()) {
if (null != m_postr) {
context.save();
context.setGlobalAlpha(alpha);
context.drawImage(m_postr, 0, 0, wide, high);
context.restore();
} else {
String fill = getFillColor();
if (null != fill) {
context.save();
context.setGlobalAlpha(alpha);
context.setFillColor(fill);
context.fillRect(0, 0, wide, high);
context.restore();
}
}
return false;
}
context.save();
context.setGlobalAlpha(alpha);
if ((false == m_xorig) && (m_filters.isActive())) {
try {
m_canvas.getContext().drawImage(m_video.getElement(), 0, 0, wide, high);
m_canvas
.getContext()
.putImageData(
m_filters.filter(m_canvas.getContext().getImageData(0, 0, wide, high), false),
0,
0);
context.drawImage(m_canvas.getElement(), 0, 0, wide, high);
} catch (Exception e) {
// We should only get an exception here if the URL is cross-origin, and getImageData() is
// basically a security exception.
// ...or other unknown bad things, either way, turn off filtering. DSJ 7/18/2014
context.drawImage(m_video.getElement(), 0, 0, wide, high);
m_xorig = true;
LienzoCore.get()
.error("ERROR: In Movie filtering " + m_video.getSrc() + " " + e.getMessage());
}
} else {
context.drawImage(m_video.getElement(), 0, 0, wide, high);
}
context.restore();
}
return false;
}
