In 2007, Adobe launched Pixel Bender for the Flash Runtime. This allowed Flash Developers parallel processing for the first time. This presentation was the first introduction to the new capabilities in the Flash Runtime.

1. 2007 Adobe Systems Incorporated. All Rights Reserved.
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Kevin Goldsmith
Engineering Manager - AIF
Adobe Systems Inc.
Bob Archer
Senior Computer Scientist - AIF
Adobe Systems Inc.
Saikat Kanjilal
Computer Scientist - Emerging Solutions
Adobe Systems Inc.
MAX 2007
CONNECT. DISCOVER. INSPIRE.

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Kevin

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Kevin

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Kevin
(Chicago Born and Raised)

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Bob

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Bob

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Bob
(trust him, he’s British)

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Saikat

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Saikat

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Saikat
(insert something witty here about Eastern Washington)

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This Talk

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This Talk
Adobe Image Foundation Toolkit
Technology Preview

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This Talk
AIF Toolkit

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This Talk
AIF Toolkit
Available on Adobe Labs RIGHT NOW
http://labs.adobe.com/wiki/index.php/AIF_Toolkit

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This Talk
(Codename) Hydra Language

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This Talk
(Codename) Hydra Language
(Adobe Legal makes us say Codename)

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This Talk
(Codename) Hydra Language
(Adobe Legal makes us say Codename)
We’ll have a name just as cool soon

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This Talk
AIF
AIF

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This Talk
Ability for Flash Authors to create Filters a highly requested feature

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This Talk
Ability for Flash Authors to create Filters a highly requested feature
Iterating on pixels in the bitmap object is slow and difficult

26. 2007 Adobe Systems Incorporated. All Rights Reserved.
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This Talk
Ability for Flash Authors to create Filters a highly requested feature
Iterating on pixels in the bitmap object is slow and difficult
Hydra for Flash can make doing animated filters easier with high performance

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This Talk
Ability for Flash Authors to create Filters a highly requested feature
Iterating on pixels in the bitmap object is slow and difficult
Hydra for Flash can make doing animated filters easier with high performance
For certain classes of filters

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Flash Bitmap API vs Hydra

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Flash Bitmap API vs Hydra
// loop through the pixels:
for (var x:Number = xMin; x < xMax; x++) {
for (var y:Number = yMin; y < yMax; y++) {
// get the pixel's RGB value:
var rgba:Number = bmp.getPixel32(x,y);
// isolate channels:
var red:Number = (rgba & 0xFF000000) >>
24;
var green:Number = (rgba & 0x00FF0000)
>> 16;
var blue:Number = (rgba & 0x0000FF00) >>
8;
var alpha:Number = (rgba & 0x000000FF);
red = red * .5;
green = green * .8;
var output:Number = (red << 24) | (blue <<
16) | (green << 8) | alpha;
outbmp.setPixel32(x,y,output);
}
}
kernel NewFilter
{
void evaluatePixel(in image4 src, out pixel4
dst)
{
pixel4 temp =
sampleNearest(src,outCoord());
dst = pixel4( temp.r * .5, temp.b, temp.g *
.8, temp.a );
}
}

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This Talk
An Introduction to the Hydra Language and the AIF Toolkit
A Sneak Peak of the AIF Server

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ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
Demonstration – some sample filters

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ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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Digression – what is an image?

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Digression – what is an image?

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Digression – what is an image?

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Digression – what is an image?

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Digression – what is an image?

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Digression – what is an image?

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Digression – what is an image?

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Digression – what is an image?

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Digression – what is an image?

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

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kernel Identity
{
void evaluatePixel( in image4 src, out pixel4 dest )
{
dest = sampleNearest( src, outCoord() );
}
}
Code walkthrough – identity filter

52. 2007 Adobe Systems Incorporated. All Rights Reserved.
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ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
Hydra programming model

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Write a function that produces a single
output pixel
Hydra programming model

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Hydra programming model

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Hydra programming model

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Hydra programming model

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Hydra programming model

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ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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Code walkthrough – polka dot filter

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kernel PinkPolkaDots
{
parameter float radius;
parameter float spacing;
const pixel4 pink = pixel4( 1.0, 0.75 ,0.8, 1.0 );
void evaluatePixel( in image4 src, out pixel4 dest )
{
float2 center = floor(outCoord() / spacing)*spacing + (spacing / 2.0);
float dist = distance( center, outCoord() );
pixel4 originalColor = sampleNearest( src, outCoord() );
dest = dist < radius ? pink : originalColor;
}
}
Code walkthrough – polka dot filter

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kernel PinkPolkaDots
{
parameter float radius;
parameter float spacing;
const pixel4 pink = pixel4( 1.0, 0.75 ,0.8, 1.0 );
void evaluatePixel( in image4 src, out pixel4 dest )
{
float2 center = floor(outCoord() / spacing)*spacing + (spacing / 2.0);
float dist = distance( center, outCoord() );
pixel4 originalColor = sampleNearest( src, outCoord() );
dest = dist < radius ? pink : originalColor;
}
}
Code walkthrough – polka dot filter

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kernel PinkPolkaDots
{
parameter float radius;
parameter float spacing;
const pixel4 pink = pixel4( 1.0, 0.75 ,0.8, 1.0 );
void evaluatePixel( in image4 src, out pixel4 dest )
{
float2 center = floor(outCoord() / spacing)*spacing + (spacing / 2.0);
float dist = distance( center, outCoord() );
pixel4 originalColor = sampleNearest( src, outCoord() );
dest = dist < radius ? pink : originalColor;
}
}
Code walkthrough – polka dot filter

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kernel PinkPolkaDots
{
parameter float radius;
parameter float spacing;
const pixel4 pink = pixel4( 1.0, 0.75 ,0.8, 1.0 );
void evaluatePixel( in image4 src, out pixel4 dest )
{
float2 center = floor(outCoord() / spacing)*spacing + (spacing / 2.0);
float dist = distance( center, outCoord() );
pixel4 originalColor = sampleNearest( src, outCoord() );
dest = dist < radius ? pink : originalColor;
}
}
Code walkthrough – polka dot filter

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ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
Hydra in detail

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kernel PinkPolkaDots
{
parameter float radius;
parameter float spacing;
const pixel4 pink = pixel4( 1.0, 0.75 ,0.8, 1.0 );
void evaluatePixel( in image4 src, out pixel4 dest )
{
float2 center = floor(outCoord() / spacing)*spacing + (spacing / 2.0);
float dist = distance( center, outCoord() );
pixel4 originalColor = sampleNearest( src, outCoord() );
dest = dist < radius ? pink : originalColor;
}
}
Hydra in detail – Syntax and Semantics

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kernel PinkPolkaDots
{
parameter float radius;
parameter float spacing;
const pixel4 pink = pixel4( 1.0, 0.75 ,0.8, 1.0 );
void evaluatePixel( in image4 src, out pixel4 dest )
{
float2 center = floor(outCoord() / spacing)*spacing + (spacing / 2.0);
float dist = distance( center, outCoord() );
pixel4 originalColor = sampleNearest( src, outCoord() );
dest = dist < radius ? pink : originalColor;
}
}
Hydra in detail – Syntax and Semantics

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kernel PinkPolkaDots
{
parameter float radius;
parameter float spacing;
const pixel4 pink = pixel4( 1.0, 0.75 ,0.8, 1.0 );
void evaluatePixel( in image4 src, out pixel4 dest )
{
float2 center = floor(outCoord() / spacing)*spacing + (spacing / 2.0);
float dist = distance( center, outCoord() );
pixel4 originalColor = sampleNearest( src, outCoord() );
dest = dist < radius ? pink : originalColor;
}
}
Hydra in detail – Syntax and Semantics

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float
int
bool
pixel1
int2 float2 bool2 pixel2
int3 float3 bool3 pixel3
int4 float4 bool4 pixel4
float2x2
float3x3
float4x4
Hydra in detail – Types

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float
int
bool
pixel1
int2 float2 bool2 pixel2
int3 float3 bool3 pixel3
int4 float4 bool4 pixel4
float2x2
float3x3
float4x4
Hydra in detail – Types

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float
int
bool
pixel1
int2 float2 bool2 pixel2
int3 float3 bool3 pixel3
int4 float4 bool4 pixel4
float2x2
float3x3
float4x4
Hydra in detail – Types

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kernel Twirl
{
parameter float radius;
parameter float2 center;
parameter float twirlAngle;
void evaluatePixel( in image4 src, out float4 dest )
{
float2 relativePos = outCoord() - center;
float distFromCenter = length( relativePos ) / radius;
float cosAngle = cos(twirlAngle);
float sinAngle = sin(twirlAngle);
float2x2 rotationMat = float2x2(
cosAngle, sinAngle,
-sinAngle, cosAngle );
relativePos = rotationMat * relativePos;
dest = sampleLinear( src, relativePos + center );
}
}
Hydra in detail – Operators

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kernel Twirl
{
parameter float radius;
parameter float2 center;
parameter float twirlAngle;
void evaluatePixel( in image4 src, out float4 dest )
{
float2 relativePos = outCoord() - center;
float distFromCenter = length( relativePos ) / radius;
float cosAngle = cos(twirlAngle);
float sinAngle = sin(twirlAngle);
float2x2 rotationMat = float2x2(
cosAngle, sinAngle,
-sinAngle, cosAngle );
relativePos = rotationMat * relativePos;
dest = sampleLinear( src, relativePos + center );
}
}
Hydra in detail – Operators

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kernel Twirl
{
parameter float radius;
parameter float2 center;
parameter float twirlAngle;
void evaluatePixel( in image4 src, out float4 dest )
{
float2 relativePos = outCoord() - center;
float distFromCenter = length( relativePos ) / radius;
float cosAngle = cos(twirlAngle);
float sinAngle = sin(twirlAngle);
float2x2 rotationMat = float2x2(
cosAngle, sinAngle,
-sinAngle, cosAngle );
relativePos = rotationMat * relativePos;
dest = sampleLinear( src, relativePos + center );
}
}
Hydra in detail – Operators

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Hydra in detail – Functions
sin
cos
tan
asin
acos
atan
atan
radians
degrees
pow
exp
exp2
log
log2
sqrt
abs
sign
floor
ceil
fract
mod
min
max
step
clamp
mix
smoothStep
matrixCompMult
inverseSqrt
length
distance
dot
cross
any
all
not
nowhere
everywhere
transform
union
intersect
outset
inset
bounds
isEmpty
sample
sampleLinear
sampleNearest
lessThan
lessThanEqual
greaterThan
greaterThanEqual
equal
notEqual

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Hydra in detail – Functions
sin
cos
tan
asin
acos
atan
atan
radians
degrees
pow
exp
exp2
log
log2
sqrt
abs
sign
floor
ceil
fract
mod
min
max
step
clamp
mix
smoothStep
matrixCompMult
inverseSqrt
length
distance
dot
cross
any
all
not
nowhere
everywhere
transform
union
intersect
outset
inset
bounds
isEmpty
sample
sampleLinear
sampleNearest
lessThan
lessThanEqual
greaterThan
greaterThanEqual
equal
notEqual

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Hydra in detail – Functions
sin
cos
tan
asin
acos
atan
atan
radians
degrees
pow
exp
exp2
log
log2
sqrt
abs
sign
floor
ceil
fract
mod
min
max
step
clamp
mix
smoothStep
matrixCompMult
inverseSqrt
length
distance
dot
cross
any
all
not
nowhere
everywhere
transform
union
intersect
outset
inset
bounds
isEmpty
sample
sampleLinear
sampleNearest
lessThan
lessThanEqual
greaterThan
greaterThanEqual
equal
notEqual

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Hydra in detail – Functions
sin
cos
tan
asin
acos
atan
atan
radians
degrees
pow
exp
exp2
log
log2
sqrt
abs
sign
floor
ceil
fract
mod
min
max
step
clamp
mix
smoothStep
matrixCompMult
inverseSqrt
length
distance
dot
cross
any
all
not
nowhere
everywhere
transform
union
intersect
outset
inset
bounds
isEmpty
sample
sampleLinear
sampleNearest
lessThan
lessThanEqual
greaterThan
greaterThanEqual
equal
notEqual

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ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
Hydra for Flash

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Hydra for Flash

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90
ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
Efficiency tips

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Write a function that produces a single
output pixel
Efficiency tips

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Efficiency tips

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Efficiency tips

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Efficiency tips

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Efficiency tips

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ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
Demonstration – AIF toolkit

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Writing a kernel in the AIF Toolkit

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ƒ Andrew S. Glassner – Principles of Digital Image Synthesis
ƒ Randi Rost – OpenGL® Shading Language
ƒ George Wolberg - Digital Image Warping
ƒ Randima Fernando – GPU Gems
ƒ Matt Pharr & Randima Fernando – GPU Gems 2
ƒ Hurbert Nguyen – GPU Gems 3
ƒ Shader examples: http://shady.goyman.com/
Bibliography

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ƒ Hydra language
ƒ AIF Toolkit
ƒ http://labs.adobe.com/wiki/index.php/AIF_Toolkit
Summary

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0
ƒ Introduction
ƒ Demonstration – some sample filters
ƒ Code walkthrough – identity filter
ƒ Hydra programming model
ƒ Code walkthrough – polka dot filter
ƒ Hydra in detail
ƒ Hydra for Flash
ƒ Efficiency tips
ƒ Demonstration – AIF toolkit
ƒ Bibliography
ƒ Summary
ƒ AIF server
AIF server