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Extract rect calculation

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Philip Giuliani 2015-04-08 21:45:38 +02:00
parent 6778533642
commit 50e46b104e
1 changed files with 24 additions and 20 deletions
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38
src/tiledimage.js
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@ -1155,32 +1155,36 @@ function drawTiles( tiledImage, lastDrawn ){
viewer, viewer,
viewport, viewport,
position, position,
tileSource; tileSource,
needsRestore = false;
// TODO: Move this function
var boxToDrawerRectangle = function( box ) {
var topLeft = tiledImage.viewport.pixelFromPoint(box.getTopLeft(), true);
var size = tiledImage.viewport.deltaPixelsFromPoints(box.getSize(), true);
return new $.Rect(
topLeft.x * $.pixelDensityRatio,
topLeft.y * $.pixelDensityRatio,
size.x * $.pixelDensityRatio,
size.y * $.pixelDensityRatio
);
};
var needsRestore = false;
if ( tiledImage._clip ) { if ( tiledImage._clip ) {
tiledImage._drawer.saveContext(); tiledImage._drawer.saveContext();
var box = tiledImage.imageToViewportRectangle(tiledImage._clip, true); var box = tiledImage.imageToViewportRectangle(tiledImage._clip, true);
var topLeft = tiledImage.viewport.pixelFromPoint(box.getTopLeft(), true); var clipRect = boxToDrawerRectangle(box);
var size = tiledImage.viewport.deltaPixelsFromPoints(box.getSize(), true);
box = new OpenSeadragon.Rect(topLeft.x * $.pixelDensityRatio, tiledImage._drawer.setClip(clipRect);
topLeft.y * $.pixelDensityRatio,
size.x * $.pixelDensityRatio,
size.y * $.pixelDensityRatio);
tiledImage._drawer.setClip(box);
needsRestore = true; needsRestore = true;
} }
if ( lastDrawn.length === 0 ) { if ( lastDrawn.length === 0 ) {
tiledImage._drawer.saveContext(); tiledImage._drawer.saveContext();
var box = tiledImage.getBounds(true); var placeholderRect = boxToDrawerRectangle( tiledImage.getBounds(true) );
var topLeft = tiledImage.viewport.pixelFromPoint(box.getTopLeft(), true);
var size = tiledImage.viewport.deltaPixelsFromPoints(box.getSize(), true); tiledImage._drawer.drawPlaceholder(placeholderRect);
box = new OpenSeadragon.Rect(topLeft.x * $.pixelDensityRatio,
topLeft.y * $.pixelDensityRatio,
size.x * $.pixelDensityRatio,
size.y * $.pixelDensityRatio);
tiledImage._drawer.drawPlaceholder(box);
needsRestore = true; needsRestore = true;
} }