65 lines
2 KiB
Text
65 lines
2 KiB
Text
#-------------------------------------------------------------------------------
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# canvas.Image
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#-------------------------------------------------------------------------------
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# Class for an image element on a canvas
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#
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var Image = {
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new: func(ghost) {
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return {parents: [Image, Element.new(ghost)]};
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},
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# Set image file to be used
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#
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# @param file Path to file or canvas (Use canvas://... for canvas, eg.
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# canvas://by-index/texture[0])
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setFile: func(file) {
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me.set("src", file);
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},
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# Set rectangular region of source image to be used
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#
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# @param left Rectangle minimum x coordinate
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# @param top Rectangle minimum y coordinate
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# @param right Rectangle maximum x coordinate
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# @param bottom Rectangle maximum y coordinate
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# @param normalized Whether to use normalized ([0,1]) or image
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# ([0, image_width]/[0, image_height]) coordinates
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setSourceRect: func {
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# Work with both positional arguments and named arguments.
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# Support first argument being a vector instead of four separate ones.
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if (size(arg) == 1) {
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arg = arg[0];
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}
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elsif (size(arg) and size(arg) < 4 and typeof(arg[0]) == "vector") {
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arg = arg[0]~arg[1:];
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}
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if (!contains(caller(0)[0], "normalized")) {
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if (size(arg) > 4)
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var normalized = arg[4];
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else var normalized = 1;
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}
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if (size(arg) >= 3)
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var (left,top,right,bottom) = arg;
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me._node.getNode("source", 1).setValues({
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left: left,
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top: top,
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right: right,
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bottom: bottom,
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normalized: normalized
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});
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return me;
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},
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# Set size of image element
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#
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# @param width
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# @param height
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# - or -
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# @param size ([width, height])
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setSize: func {
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me._node.setValues({size: _arg2valarray(arg)});
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return me;
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}
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};
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