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Meals & nutrition

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Roman Wright
Roman Wright

<img Width "200" Height "112" Src "https: Www....

An 'image' element establishes a new viewport for the referenced file as described in Establishing a new viewport. The bounds for the new viewport are defined by attributes x, y, width and height. The placement and scaling of the referenced image are controlled by the preserveAspectRatio attribute on the 'image' element.

<img width "200" height "112" src "https: www....


When an 'image' element references an SVG image the preserveAspectRatio attribute as well as the clip and overflow properties on the root element in the referenced SVG image are ignored (in the same manner as the x, y, width and height attributes are ignored). Instead, the preserveAspectRatio attribute on the referencing 'image' element defines how the SVG image content is fitted into the viewport and the clip and overflow properties on the 'image' element define how the SVG image content is clipped (or not) relative to the viewport.

The value of the 'viewBox' attribute to use when evaluating the preserveAspectRatio attribute is defined by the referenced content. For content that clearly identifies a viewBox (e.g. an SVG file with the 'viewBox' attribute on the outermost svg element) that value should be used. For most raster content (PNG, JPEG) the bounds of the image should be used (i.e. the 'image' element has an implicit 'viewBox' of "0 0 raster-image-width raster-image-height"). Where no value is readily available (e.g. an SVG file with no 'viewBox' attribute on the outermost 'svg' element) the preserveAspectRatio attribute is ignored, and only the translate due to the 'x' & 'y' attributes of the viewport is used to display the content.

For example, if the image element referenced a PNG or JPEG and preserveAspectRatio="xMinYMin meet", then the aspect ratio of the raster would be preserved (which means that the scale factor from image's coordinates to current user space coordinates would be the same for both X and Y), the raster would be sized as large as possible while ensuring that the entire raster fits within the viewport, and the top/left of the raster would be aligned with the top/left of the viewport as defined by the attributes 'x', 'y', 'width' and 'height' on the 'image' element. If the value of preserveAspectRatio was 'none' then aspect ratio of the image would not be preserved. The image would be fitted such that the top/left corner of the raster exactly aligns with coordinate (x, y) and the bottom/right corner of the raster exactly aligns with coordinate (x+width,y+height). The resource referenced by the 'image' element represents a separate document which generates its own parse tree and document object model (if the resource is XML). Thus, there is no inheritance of properties into the image.

Before CSS became the standard way to control web page layout, it was common to include inline styling information. Under that paradigm, it was common to include sizing information along with the markup using the width and height attributes. This method will still work on most browsers today, but it is deprecated and should not be done.

The value of the viewBox attribute is a list of four numbers: min-x, min-y, width and height. The numbers min-x and min-y represent the top left coordinates of the viewport. The numbers width and height represent its dimensions. These numbers, which are separated by whitespace and/or a comma, specify a rectangle in user space which is mapped to the bounds of the viewport established for the associated SVG element (not the browser viewport). 041b061a72


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