SvgCreate

From Multi Theft Auto: Wiki
Jump to navigation Jump to search

* FEATURE ADDED IN 1.5.9 (REVISION: r20979)

Creates an svg from size (blank document), filepath or raw data.


[[{{{image}}}|link=|]] Important Note: Before r21155 (3157905) the provided callback wasn't stored on the SVG and was only fired once after the function had performed its task. This is no longer the case - each SVG can now store a single callback function (optional) which is fired every time the SVG texture has been changed/updated.

Syntax

svg svgCreate ( int width, int height [, string pathOrRawData, function callback ( element svg ) ] )

Required Arguments

  • width: Desired width, preferably power of two (16, 32, 64 etc.), maximum is 4096
  • height : Desired height, preferably power of two (16, 32, 64 etc.), maximum is 4096

Optional Arguments

NOTE: When using optional arguments, you might need to supply all arguments before the one you wish to use. For more information on optional arguments, see optional arguments.

  • pathOrRawData: A string representing the path to your SVG file, or the raw SVG data
  • callback: A callback function which is stored on the SVG and fired every time the SVG texture is updated (for example, via svgSetDocumentXML).

Note: See svgSetUpdateCallback for setting an svg's callback function after it has been created.

Returns

  • Returns an svg if created successfully, false otherwise.

Example

This is a basic example of how you can create an SVG from raw data (or path) and draw it with dxDrawImage via onClientRender.

-- This could also be a file, with the path provided to svgCreate instead
local rawSvgData = [[
    <svg viewBox="0 0 500 500" xmlns="http://www.w3.org/2000/svg">
        <circle cx="250" cy="250" r="250" fill="#0fc0fc" />
    </svg>
]]

local myCircleSvg

local function drawCircleSvg()
    dxDrawImage(0, 0, 500, 500, myCircleSvg, 0, 0, 0, tocolor(255, 255, 255), false)
end

local function init()
    -- Create an SVG containing a circle, using the raw XML data above
    myCircleSvg = svgCreate(500, 500, rawSvgData)
    addEventHandler("onClientRender", root, drawCircleSvg)
end
addEventHandler("onClientResourceStart", resourceRoot, init)

Here's another, more in-depth example which utilizes the callback argument. You can use the F2 key to set the SVG to a random size and see the update callback output a message to debugscript.

-- This could also be a file, with the path provided to svgCreate instead
local rawSvgData = [[
    <svg viewBox="0 0 500 500" xmlns="http://www.w3.org/2000/svg">
        <circle cx="250" cy="250" r="250" fill="#0fc0fc" />
    </svg>
]]

local svgs = {}

local function render(svg)
    if (not isElement(svg)) or (getElementType(svg) ~= "svg") then
        removeEventHandler("onClientRender", root, svgs[svg].handler)
        svgs[svg] = nil
    end

    local width, height = svgGetSize(svg)
    dxDrawImage(0, 0, width, height, svg, 0, 0, 0, tocolor(255, 255, 255), false)
end

local function onUpdate(svg)
    -- If this is the first update, add svg to our table and start drawing it
    if (not svgs[svg]) then
        svgs[svg] = {
            state = true,
            handler = function()
                render(svg)
            end
        }

        addEventHandler("onClientRender", root, svgs[svg].handler)
    end

    iprint("SVG texture updated", svg, getTickCount())
end

local function init()
    -- Create an SVG containing a circle, using the raw XML data above
    local mySvg = svgCreate(500, 500, rawSvgData, onUpdate)

    -- Bind a key to set SVG to a random size, which will trigger the onUpdate callback
    bindKey("F2", "down", function()
        setRandomSVGSize(mySvg)
    end)
end
addEventHandler("onClientResourceStart", resourceRoot, init)

function setRandomSVGSize(svg)
    local width, height = svgGetSize(svg)
    local diff = math.min(width, height) /  math.max(width, height)
    local size = math.random(100, 500)

    svgSetSize(svg, size, size * diff)
end


Requirements

Minimum server version n/a
Minimum client version 1.5.8-9.20979

Note: Using this feature requires the resource to have the above minimum version declared in the meta.xml <min_mta_version> section. e.g. <min_mta_version client="1.5.8-9.20979" />

See Also

* FEATURE ADDED IN 1.5.9 (REVISION: r20979)
* FEATURE ADDED IN 1.5.9 (REVISION: r21155)