Matrix math for the web - Web APIs
types of matrices, but the ones we are interested in are the 3d transformation matrices. these matrices consist of a set of 16 values arranged in a 4x4 grid. in javascript, it is easy to represent a matrix as an array. let's begin by considering the identity matrix. this is a special transformation matrix which functions much like the number 1 does in scalar multiplication; just like n * 1 = n, multiplying any matrix by the identity matrix gives a resulting matrix whose values match the original matrix. the identity matrix looks like this in javascript: let identitymatrix = [ 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 ]; what does multiplying by the identity matrix look like? the easiest example is to multiply a single point by the identity matrix. since a 3d point only needs thr...
...g w to 1 will make the math work out. after adding the w component to the point, notice how neatly the matrix and the point line up: [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1] [4, 3, 2, 1] // point at [x, y, z, w] the w component has some additional uses that are out of scope for this article. check out the webgl model view projection article for a look into how it comes in handy. ...
...tice how neatly the matrix and the point line up: [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1] [4, 3, 2, 1] // point at [x, y, z, w] the w component has some additional uses that are out of scope for this article. check out the webgl model view projection article for a look into how it comes in handy. ...
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Advanced styling effects - Learn web development
new, and slightly less well supported than filters. there is no support as yet in edge, and safari only supports some of the blend mode options. background-blend-mode again, let's look at some examples so we can understand this better. ...
...al with the blended version: <div> </div> <div class="multiply"> </div> now some css — we are adding to the <div> one background image and a green background color: div { width: 250px; height: 130px; padding: 10px; margin: 10px; display: inline-block; background: url(https://mdn.mozillademos.org/files/13090/colorful-heart.png) no-repeat center 20px; background-color: green; } .multiply { background-blend-mode: multiply; } the result we get is this — you can see the original on the left, and the multiply blend mode on the right: mix-blend-mode now let's look at mix-blend-mode. here we'll present the same two <div>s, but each one is now sat on top of a simple <div> with a purple background, to show how the elements will blend together: <article> no mix blend mode <d...
...get is this — you can see the original on the left, and the multiply blend mode on the right: mix-blend-mode now let's look at mix-blend-mode. ...
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WebGL model view projection - Web APIs
so many ones and zeros that are used to represent them. the more operations that are done on larger numbers, the more and more errors accumulate into the result. when dividing by w, this can effectively increase the precision of very large numbers by operating on two potentially smaller, less error-prone numbers. the final benefit of using homogeneous coordinates is that they fit very nicely for multiplying against 4x4 matrices. a vertex must match at least one of the dimensions of a matrix in order to be multiplied against it. the 4x4 matrix can be used to encode a variety of useful transformations. in fact, the typical perspective projection matrix uses the division by the w component to achieve its transformation. the clipping of points and polygons from clip space actually happens after the ...
...sired spot in clip space. the cube is the size of clip space (-1,-1,-1) to (1,1,1) so it will need to be shrunk down in order to not fill the entirety of clip space. this matrix is sent directly to the shader, having been multiplied in javascript beforehand. the following code sample defines a method on the cubedemo object that will create the model matrix. it uses custom functions to create and multiply matrices as defined in the mdn webgl shared code. the new function looks like this: cubedemo.prototype.computemodelmatrix = function(now) { //scale down by 50% var scale = mdn.scalematrix(0.5, 0.5, 0.5); // rotate a slight tilt var rotatex = mdn.rotatexmatrix(now * 0.0003); // rotate according to time var rotatey = mdn.rotateymatrix(now * 0.0005); // move slightly down var pos...
...de. the new function looks like this: cubedemo.prototype.computemodelmatrix = function(now) { //scale down by 50% var scale = mdn.scalematrix(0.5, 0.5, 0.5); // rotate a slight tilt var rotatex = mdn.rotatexmatrix(now * 0.0003); // rotate according to time var rotatey = mdn.rotateymatrix(now * 0.0005); // move slightly down var position = mdn.translatematrix(0, -0.1, 0); // multiply together, make sure and read them in opposite order this.transforms.model = mdn.multiplyarrayofmatrices([ position, // step 4 rotatey, // step 3 rotatex, // step 2 scale // step 1 ]); }; in order to use this in the shader it must be set to a uniform location. the locations for the uniforms are saved in the locations object shown below: this.locations.model = gl.getuni...
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Viewpoints and viewers: Simulating cameras in WebXR - Web APIs
is: let viewmatrix = view.transform.inverse.matrix; if the library you're using accepts an xrrigidtransform object directly, you can instead get view.transform.inverse, rather than pulling out just the array representing the view matrix. composing multiple transforms if your camera needs to be performing multiple transforms simultaneously, such as zooming and panning at the same time, you can multiply the transform matrices together to compose them into a single matrix that applies both changes at once. see multiplying two matrices in the article matrix math for the web for a clear but readable function that does this or use your preferred matrix math library such as glmatrix to do the work. it's crucial to remember that unlike typical arithmetic, where multiplication is commutative (that is,...
...ompose them into a single matrix that applies both changes at once. see multiplying two matrices in the article matrix math for the web for a clear but readable function that does this or use your preferred matrix math library such as glmatrix to do the work. it's crucial to remember that unlike typical arithmetic, where multiplication is commutative (that is, you get the same answer whether you multiply left to right or right to left), matrix multiplication is not commutative! this is because each transform affects the position of the object and possibly the very coordinate system itself, which can dramatically change the results of the next operation performed. so you need to be careful about the order in which you apply your transforms when building your composite transform (or directly applyi...
...is because each transform affects the position of the object and possibly the very coordinate system itself, which can dramatically change the results of the next operation performed. so you need to be careful about the order in which you apply your transforms when building your composite transform (or directly applying transforms in sequence). applying the transform to apply the transform, you multiply the point or vector by the transform or composition of transforms. this has been a very quick overview of the concepts of position in terms of physical location, orientation or facing direction, and perspective. for more detail on the subject, see the articles geometry and reference spaces, webgl model view projection, and matrix math for the web. simulating classic cinematography cinematograp...
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<blend-mode> - CSS: Cascading Style Sheets
normal the final color is the top color, regardless of what the bottom color is. the effect is like two opaque pieces of paper overlapping. <div id="div"></div> #div { width: 300px; height: 300px; background: url('https://mdn.mozillademos.org/files/8543/br.png'), url('https://mdn.mozillademos.org/files/8545/tr.png'); background-blend-mode: normal; } multiply the final color is the result of multiplying the top and bottom colors. a black layer leads to a black final layer, and a white layer leads to no change. the effect is like two images printed on transparent film overlapping. <div id="div"></div> #div { width: 300px; height: 300px; background: url('https://mdn.mozillademos.org/files/8543/br.png'), url('https://md...
...om colors. a black layer leads to a black final layer, and a white layer leads to no change. the effect is like two images printed on transparent film overlapping. <div id="div"></div> #div { width: 300px; height: 300px; background: url('https://mdn.mozillademos.org/files/8543/br.png'), url('https://mdn.mozillademos.org/files/8545/tr.png'); background-blend-mode: multiply; } screen the final color is the result of inverting the colors, multiplying them, and inverting that value. a black layer leads to no change, and a white layer leads to a white final layer. the effect is like two images shone onto a projection screen. <div id="div"></div> #div { width: 300px; height: 300px; background: url('https://mdn.mozillademos.org/files/8543/b...
...white layer leads to a white final layer. the effect is like two images shone onto a projection screen. <div id="div"></div> #div { width: 300px; height: 300px; background: url('https://mdn.mozillademos.org/files/8543/br.png'), url('https://mdn.mozillademos.org/files/8545/tr.png'); background-blend-mode: screen; } overlay the final color is the result of multiply if the bottom color is darker, or screen if the bottom color is lighter. this blend mode is equivalent to hard-light but with the layers swapped. <div id="div"></div> #div { width: 300px; height: 300px; background: url('https://mdn.mozillademos.org/files/8543/br.png'), url('https://mdn.mozillademos.org/files/8545/tr.png'); background-blend-mode: overlay; } ...
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mix-blend-mode - CSS: Cascading Style Sheets
element's content should blend with the content of the element's parent and the element's background. the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. ...
...r; mix-blend-mode: luminosity; /* global values */ mix-blend-mode: initial; mix-blend-mode: inherit; mix-blend-mode: unset; values <blend-mode> the blending mode that should be applied. ...
...%,100%)" /> </lineargradient> </defs> <ellipse class="item r" cx="75" cy="75" rx="25" ry="70"></ellipse> <ellipse class="item g" cx="75" cy="75" rx="25" ry="70"></ellipse> <ellipse class="item b" cx="75" cy="75" rx="25" ry="70"></ellipse> </svg> </div> </div> </div> <div class="cell"> multiply <div class="container multiply"> <div class="group"> <div class="item firefox"></div> <svg viewbox="0 0 150 150"> <ellipse class="item r" cx="75" cy="75" rx="25" ry="70"></ellipse> <ellipse class="item g" cx="75" cy="75" rx="25" ry="70"></ellipse> <ellipse class="item b" cx="75" cy="75" rx="25" ry="70"></ellipse> ...
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Functions - JavaScript
scope can access all variables defined in the global scope. a function defined inside another function can also access all variables defined in its parent function, and any other variables to which the parent function has access. // the following variables are defined in the global scope var num1 = 20, num2 = 3, name = 'chamahk'; // this function is defined in the global scope function multiply() { return num1 * num2; } multiply(); // returns 60 // a nested function example function getscore() { var num1 = 2, num2 = 3; function add() { return name + ' scored ' + (num1 + num2); } return add(); } getscore(); // returns "chamahk scored 5" scope and the function stack recursion a function can refer to and call itself. there are three ways for a function to refer...
...ts and variables in all scopes it references. since each call provides potentially different arguments, a new closure is created for each call to outside. the memory can be freed only when the returned inside is no longer accessible. this is not different from storing references in other objects, but is often less obvious because one does not set the references directly and cannot inspect them. multiply-nested functions functions can be multiply-nested. for example: a function (a) contains a function (b), which itself contains a function (c). both functions b and c form closures here. so, b can access a, and c can access b. in addition, since c can access b which can access a, c can also access a. thus, the closures can contain multiple scopes; they recursively contain the scope of the ...
...t a different default value. this is exactly what default parameters do. without default parameters (pre-ecmascript 2015) in the past, the general strategy for setting defaults was to test parameter values in the body of the function and assign a value if they are undefined. in the following example, if no value is provided for b, its value would be undefined when evaluating a*b, and a call to multiply would normally have returned nan. however, this is prevented by the second line in this example: function multiply(a, b) { b = typeof b !== 'undefined' ? b : 1; return a * b; } multiply(5); // 5 with default parameters (post-ecmascript 2015) with default parameters, a manual check in the function body is no longer necessary. you can simply put 1 as the default value for b in the functi...
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Default parameters - JavaScript
statements } description in javascript, function parameters default to undefined. however, it's often useful to set a different default value. this is where default parameters can help. in the past, the general strategy for setting defaults was to test parameter values in the function body and assign a value if they are undefined. ...
...undefined. however, it's often useful to set a different default value. this is where default parameters can help. in the past, the general strategy for setting defaults was to test parameter values in the function body and assign a value if they are undefined. in the following example, if no value is provided for b when multiply is called, b's value would be undefined when evaluating a * b and multiply would return nan. ...
... to set a different default value. this is where default parameters can help. in the past, the general strategy for setting defaults was to test parameter values in the function body and assign a value if they are undefined. in the following example, if no value is provided for b when multiply is called, b's value would be undefined when evaluating a * b and multiply would return nan. ...
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Functions - JavaScript
to set that property. method definition syntax starting with ecmascript 2015, you are able to define own methods in a shorter syntax, similar to the getters and setters. see method definitions for more information. var obj = { foo() {}, bar() {} }; constructor vs. declaration vs. ...
...perty. method definition syntax starting with ecmascript 2015, you are able to define own methods in a shorter syntax, similar to the getters and setters. see method definitions for more information. var obj = { foo() {}, bar() {} }; constructor vs. declaration vs. ...
...thods in a shorter syntax, similar to the getters and setters. see method definitions for more information. var obj = { foo() {}, bar() {} }; constructor vs. declaration vs. ...
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Compositing example - Web APIs
ut looks like this: compositing example this code sets up the global values used by the rest of the program. ...
...he color is determined by adding color values.', 'only the new shape is shown.', 'shapes are made transparent where both overlap and drawn normal everywhere else.', 'the pixels are of the top layer are multiplied with the corresponding pixel of the bottom layer. a darker picture is the result.', 'the pixels are inverted, multiplied, and inverted again. ...
...ng color values.', 'only the new shape is shown.', 'shapes are made transparent where both overlap and drawn normal everywhere else.', 'the pixels are of the top layer are multiplied with the corresponding pixel of the bottom layer. a darker picture is the result.', 'the pixels are inverted, multiplied, and inverted again. a lighter picture is the result (opposite of multiply)', 'a combination of multiply and screen. ...
... result (opposite of multiply)', 'a combination of multiply and screen. dark parts on the base layer become darker, and light parts become lighter.', 'retains the darkest pixels of both layers.', 'retains the lightest pixels of both layers.', 'divides the bottom layer by the inverted top layer.', 'divides the inverted bottom layer by the top layer, and then inverts the result.', 'a combination of multiply and screen like overlay, but with top and bottom layer swapped.', 'a softer version of hard-light. pure black or white does not result in pure black or white.', 'subtracts the bottom layer from the top layer or the other way round to always get a positive value.', 'like difference, but with lower contrast.', 'preserves the luma and chroma of the bottom layer, while adopting the hue of the top lay...

KeyboardEvent: code values - Web APIs
0x002d "keyx" "keyx" 0x002e "keyc" "keyc" 0x002f "keyv" "keyv" 0x0030 "keyb" "keyb" 0x0031 "keyn" "keyn" 0x0032 "keym" "keym" 0x0033 "comma" "comma" 0x0034 "period" "period" 0x0035 "slash" "slash" 0x0036 "shiftright" "shiftright" 0x0037 "numpadmultiply" "numpadmultiply" 0x0038 "altleft" "altleft" 0x0039 "space" "space" 0x003a "capslock" "capslock" 0x003b "f1" "f1" 0x003c "f2" "f2" 0x003d "f3" "f3" 0x003e "f4" "f4" 0x003f "f5" "f5" 0x0040 "f6" "f6" 0x0041 "f7" "f7" 0x0042 "f8" "f8...
... "shiftright" "shiftright" kvk_rightoption (0x3d) "altright" "altright" kvk_rightcontrol (0x3e) "controlright" "controlright" kvk_function (0x3f) "fn" (no events fired actually) "" (no events fired actually) kvk_f17 (0x40) "f17" "f17" kvk_ansi_keypaddecimal (0x41) "numpaddecimal" "numpaddecimal" kvk_ansi_keypadmultiply (0x43) "numpadmultiply" "numpadmultiply" kvk_ansi_keypadplus (0x45) "numpadadd" "numpadadd" kvk_ansi_keypadclear (0x47) "numlock" "numlock" kvk_volumeup (0x48) "audiovolumeup" (was "volumeup" until firefox 48) "audiovolumeup" (was "volumeup" until chrome 50) kvk_volumedown (0x49) "audiovolumedown" (was "volumedown" until firefox 49) ...
... 0x0035 "keyx" "keyx" 0x0036 "keyc" "keyc" 0x0037 "keyv" "keyv" 0x0038 "keyb" "keyb" 0x0039 "keyn" "keyn" 0x003a "keym" "keym" 0x003b "comma" "comma" 0x003c "period" "period" 0x003d "slash" "slash" 0x003e "shiftright" "shiftright" 0x003f "numpadmultiply" "numpadmultiply" 0x0040 "altleft" "altleft" 0x0041 "space" "space" 0x0042 "capslock" "capslock" 0x0043 "f1" "f1" 0x0044 "f2" "f2" 0x0045 "f3" "f3" 0x0046 "f4" "f4" 0x0047 "f5" "f5" 0x0048 "f6" "f6" 0x0049 "f7" "f7" 0x004a "f8" "f8...
... "backquote" 0x002a "shiftleft" 0x002b "backslash" 0x002c "keyz" 0x002d "keyx" 0x002e "keyc" 0x002f "keyv" 0x0030 "keyb" 0x0031 "keyn" 0x0032 "keym" 0x0033 "comma" 0x0034 "period" 0x0035 "slash" 0x0036 "shiftright" 0x0037 "numpadmultiply" 0x0038 "altleft" 0x0039 "space" 0x003a "capslock" 0x003b "f1" 0x003c "f2" 0x003d "f3" 0x003e "f4" 0x003f "f5" 0x0040 "f6" 0x0041 "f7" 0x0042 "f8" 0x0043 "f9" 0x0044 "f10" 0x0045 "numlock" 0x0046 "scrolllock" 0...

WebGL constants - Web APIs
ontext.blendfuncseparate() to specify the blending mode (for both, rbg and alpha, or separately). constant name value description zero 0 passed to blendfunc or blendfuncseparate to turn off a component. one 1 passed to blendfunc or blendfuncseparate to turn on a component. src_color 0x0300 passed to blendfunc or blendfuncseparate to multiply a component by the source elements color. one_minus_src_color 0x0301 passed to blendfunc or blendfuncseparate to multiply a component by one minus the source elements color. src_alpha 0x0302 passed to blendfunc or blendfuncseparate to multiply a component by the source's alpha. one_minus_src_alpha 0x0303 passed to blendfunc or blendfuncseparate to mult...
...to multiply a component by one minus the source elements color. src_alpha 0x0302 passed to blendfunc or blendfuncseparate to multiply a component by the source's alpha. one_minus_src_alpha 0x0303 passed to blendfunc or blendfuncseparate to multiply a component by one minus the source's alpha. dst_alpha 0x0304 passed to blendfunc or blendfuncseparate to multiply a component by the destination's alpha. one_minus_dst_alpha 0x0305 passed to blendfunc or blendfuncseparate to multiply a component by one minus the destination's alpha. dst_color 0x0306 passed to blendfunc or blendfuncseparate to multiply a component by the destination's color. one_minus_dst_color 0x0307 passed to blendfunc or blendfuncseparate to mul...
... constant_color 0x8001 passed to blendfunc or blendfuncseparate to specify a constant color blend function. ...
...x8cdd framebuffer_binding 0x8ca6 renderbuffer_binding 0x8ca7 max_renderbuffer_size 0x84e8 invalid_framebuffer_operation 0x0506 pixel storage modes constants passed to webglrenderingcontext.pixelstorei(). constant name value description unpack_flip_y_webgl 0x9240 unpack_premultiply_alpha_webgl 0x9241 unpack_colorspace_conversion_webgl 0x9243 additional constants defined webgl 2 these constants are defined on the webgl2renderingcontext interface. all webgl 1 constants are also available in a webgl 2 context. getting gl parameter information constants passed to webglrenderingcontext.getparameter() to specify what information to return. ...

Movement, orientation, and motion: A WebXR example - Web APIs
ction in which they'll initially be looking. cubeorientation will store the current orientation of the cube, while cubematrix and mousematrix are storage for matrices used during the rendering of the scene. inverseorientation is a quaternion which will be used to represent the rotation to apply to the reference space for the object in the frame being rendered. radians_per_degreee is the value to multiply an angle in degrees by to convert the angle into radians. the last four variables declared are storage for references to the <div> elements into which we'll output the matrices when we want to show them to the user. logging errors a function called logglerror() is implemented to provide an easily customized way to output logging information for errors that occur while executing webgl functions...
...t rendering webgl draws into the layer and therefore the xr device's display). with webgl now configured to render to the xr device, we clear the frame to black and are ready to begin rendering. the time elapsed since the last frame was rendered (in seconds) is computed by subtracting the previous frame's timestamp, lastframetime, from the current time as specified by the time parameter and then multiplying by 0.001 to convert milliseconds to seconds. the current time is then saved into lastframetime; the drawscene() function ends by iterating over every view found in the xrviewerpose, setting up the viewport for the view, and calling drawscene() to render the frame. by setting the viewport for each view, we handle the typical scenario in which the views for each eye are each rendered onto half ...
...ubematrix, // matrix to rotate yrotationfortime, // amount to rotate in radians [0, 1, 0]); // axis to rotate around (y) mat4.rotate(cubematrix, // destination matrix cubematrix, // matrix to rotate xrotationfortime, // amount to rotate in radians [1, 0, 0]); // axis to rotate around (x) } mat4.multiply(modelviewmatrix, view.transform.inverse.matrix, cubematrix); mat4.invert(normalmatrix, modelviewmatrix); mat4.transpose(normalmatrix, normalmatrix); displaymatrix(view.projectionmatrix, 4, projectionmatrixout); displaymatrix(modelviewmatrix, 4, modelmatrixout); displaymatrix(view.transform.matrix, 4, cameramatrixout); displaymatrix(mousematrix, 4, mousematrixout); { const numc...
...otationfortime, yrotationfortime, and zrotationfortime. after enabling and configuring depth testing, we check the value of the enablerotation constant to see if rotation of the cube is enabled; if it is, we use glmatrix to rotate the cubematrix (representing the cube's current orientation relative to the world space) around the three axes. with the cube's global orientation established, we then multiply that by the inverse of the view's transform matrix to get the final model view matrix—the matrix to apply to the object to both rotate it for its animation purposes, but to also move and reorient it to simulate the viewer's motion through the space. then the view's normal matrix is computed by taking the model view matrix, inverting it, and transposing it (swapping its columns and rows). the ...

Using Web Workers - Web APIs
onmessage = function(e) { console.log('message received from main script'); var workerresult = 'result: ' + (e.data[0] * e.data[1]); console.log('posting message back to main script'); postmessage(workerresult); } the onmessage handler allows us to run some code whenever a message is received, with the message itself being available in the message event's data attribute. here we simply multiply together the two numbers then use postmessage() again, to post the result back to the main thread. back in the main thread, we use onmessage again, to respond to the message sent back from the worker: myworker.onmessage = function(e) { result.textcontent = e.data; console.log('message received from worker'); } here we grab the message event data and set it as the textcontent of the result ...
...ted. shared workers a shared worker is accessible by multiple scripts — even if they are being accessed by different windows, iframes or even workers. in this section we'll discuss the javascript found in our basic shared worker example (run shared worker): this is very similar to the basic dedicated worker example, except that it has two functions available handled by different script files: multiplying two numbers, or squaring a number. both scripts use the same worker to do the actual calculation required. here we'll concentrate on the differences between dedicated and shared workers. note that in this example we have two html pages, each with javascript applied that uses the same single worker file. note: if sharedworker can be accessed from several browsing contexts, all those browsing...
...) method. note: when using the start() method to open the port connection, it needs to be called from both the parent thread and the worker thread if two-way communication is needed. sending messages to and from a shared worker now messages can be sent to the worker as before, but the postmessage() method has to be invoked through the port object (again, you'll see similar constructs in both multiply.js and square.js): squarenumber.onchange = function() { myworker.port.postmessage([squarenumber.value,squarenumber.value]); console.log('message posted to worker'); } now, on to the worker. there is a bit more complexity here as well (worker.js): onconnect = function(e) { var port = e.ports[0]; port.onmessage = function(e) { var workerresult = 'result: ' + (e.data[0] * e.data[1]);...
...t, we add a message handler on the port to do the calculation and return the result to the main thread. setting up this message handler in the worker thread also implicitly opens the port connection back to the parent thread, so the call to port.start() is not actually needed, as noted above. finally, back in the main script, we deal with the message (again, you'll see similar constructs in both multiply.js and square.js): myworker.port.onmessage = function(e) { result2.textcontent = e.data; console.log('message received from worker'); } when a message comes back through the port from the worker, we insert the calculation result inside the appropriate result paragraph. about thread safety the worker interface spawns real os-level threads, and mindful programmers may be concerned that conc...

in - SVG: Scalable Vector Graphics
ibute. workaround for backgroundimage instead of using in="backgroundimage", we need to import one of the images to blend inside the filter itself, using an <feimage> element. ...
... images to blend inside the filter itself, using an <feimage> element. html <div style="width: 420px; height: 220px;"> <svg style="width:200px; height:200px; display: inline;" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <filter id="backgroundmultiply"> <!-- this will not work. ...
.../1999/xlink"> <defs> <filter id="backgroundmultiply"> <!-- this will not work. --> <feblend in="backgroundimage" in2="sourcegraphic" mode="multiply"/> </filter> </defs> <image xlink:href="https://developer.mozilla.org/files/6457/mdn_logo_only_color.png" x="10%" y="10%" width="80%" height="80%"/> <circle cx="50%" cy="40%" r="40%" fill="#c00" style="filter:url(#backgroundmultiply);" /> </svg> <svg style="width:200px; height:200px; display: inline;" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <filter id="imagemultiply"> <!-- this is a workaround. --> <feimage xlink:href="https://developer.mozilla.org/files/6457/mdn_logo_only_color.png" x="10%" y="10%" width="80%" height="80%"/> <feblend in2="sourcegraphic" ...
... </svg> <svg style="width:200px; height:200px; display: inline;" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <filter id="imagemultiply"> <!-- this is a workaround. --> <feimage xlink:href="https://developer.mozilla.org/files/6457/mdn_logo_only_color.png" x="10%" y="10%" width="80%" height="80%"/> <feblend in2="sourcegraphic" mode="multiply"/> </filter> </defs> <circle cx="50%" cy="40%" r="40%" fill="#c00" style="filter:url(#imagemultiply);"/> </svg> </div> result specifications specification status comment filter effects module level 1the definition of 'in' in that specification. working draft no change scalable vector graphics (svg) 1.1 (second edition)the definition of 'in' ...