diff --git a/flash/filters.js b/flash/filters.js index e80c438..5d8bdd4 100644 --- a/flash/filters.js +++ b/flash/filters.js @@ -46,6 +46,48 @@ function BlurFilter (blurX, blurY, quality) { this.blurY = blurY this.quality = quality this.run = function(sourceRect, image, copy) { + //Using Mario Klingemann's StackBlur. His copyright follows. + + /* + + StackBlur - a fast almost Gaussian Blur For Canvas + + Version: 0.5 + Author: Mario Klingemann + Contact: mario@quasimondo.com + Website: http://www.quasimondo.com/StackBlurForCanvas + Twitter: @quasimondo + + In case you find this class useful - especially in commercial projects - + I am not totally unhappy for a small donation to my PayPal account + mario@quasimondo.de + + Or support me on flattr: + https://flattr.com/thing/72791/StackBlur-a-fast-almost-Gaussian-Blur-Effect-for-CanvasJavascript + + Copyright (c) 2010 Mario Klingemann + + Permission is hereby granted, free of charge, to any person + obtaining a copy of this software and associated documentation + files (the "Software"), to deal in the Software without + restriction, including without limitation the rights to use, + copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the + Software is furnished to do so, subject to the following + conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + OTHER DEALINGS IN THE SOFTWARE. + */ var numPixel=image.length/4; for(var i=0;i> shg_sum; + if ( pa != 0 ) + { + pa = 255 / pa; + pixels[yi] = ((r_sum * mul_sum) >> shg_sum) * pa; + pixels[yi+1] = ((g_sum * mul_sum) >> shg_sum) * pa; + pixels[yi+2] = ((b_sum * mul_sum) >> shg_sum) * pa; + } else { + pixels[yi] = pixels[yi+1] = pixels[yi+2] = 0; + } + + r_sum -= r_out_sum; + g_sum -= g_out_sum; + b_sum -= b_out_sum; + a_sum -= a_out_sum; + + r_out_sum -= stackIn.r; + g_out_sum -= stackIn.g; + b_out_sum -= stackIn.b; + a_out_sum -= stackIn.a; + + p = ( yw + ( ( p = x + radius + 1 ) < widthMinus1 ? p : widthMinus1 ) ) << 2; + + r_in_sum += ( stackIn.r = pixels[p]); + g_in_sum += ( stackIn.g = pixels[p+1]); + b_in_sum += ( stackIn.b = pixels[p+2]); + a_in_sum += ( stackIn.a = pixels[p+3]); + + r_sum += r_in_sum; + g_sum += g_in_sum; + b_sum += b_in_sum; + a_sum += a_in_sum; + + stackIn = stackIn.next; + + r_out_sum += ( pr = stackOut.r ); + g_out_sum += ( pg = stackOut.g ); + b_out_sum += ( pb = stackOut.b ); + a_out_sum += ( pa = stackOut.a ); + + r_in_sum -= pr; + g_in_sum -= pg; + b_in_sum -= pb; + a_in_sum -= pa; + + stackOut = stackOut.next; + + yi += 4; + } + yw += width; + } + + + for ( x = 0; x < width; x++ ) + { + g_in_sum = b_in_sum = a_in_sum = r_in_sum = g_sum = b_sum = a_sum = r_sum = 0; + + yi = x << 2; + r_out_sum = radiusPlus1 * ( pr = pixels[yi]); + g_out_sum = radiusPlus1 * ( pg = pixels[yi+1]); + b_out_sum = radiusPlus1 * ( pb = pixels[yi+2]); + a_out_sum = radiusPlus1 * ( pa = pixels[yi+3]); + + r_sum += sumFactor * pr; + g_sum += sumFactor * pg; + b_sum += sumFactor * pb; + a_sum += sumFactor * pa; + + stack = stackStart; + + for( i = 0; i < radiusPlus1; i++ ) + { + stack.r = pr; + stack.g = pg; + stack.b = pb; + stack.a = pa; + stack = stack.next; + } + + yp = width; + + for( i = 1; i <= radius; i++ ) + { + yi = ( yp + x ) << 2; + + r_sum += ( stack.r = ( pr = pixels[yi])) * ( rbs = radiusPlus1 - i ); + g_sum += ( stack.g = ( pg = pixels[yi+1])) * rbs; + b_sum += ( stack.b = ( pb = pixels[yi+2])) * rbs; + a_sum += ( stack.a = ( pa = pixels[yi+3])) * rbs; + + r_in_sum += pr; + g_in_sum += pg; + b_in_sum += pb; + a_in_sum += pa; + + stack = stack.next; + + if( i < heightMinus1 ) + { + yp += width; + } + } + + yi = x; + stackIn = stackStart; + stackOut = stackEnd; + for ( y = 0; y < height; y++ ) + { + p = yi << 2; + pixels[p+3] = pa = (a_sum * mul_sum) >> shg_sum; + if ( pa > 0 ) + { + pa = 255 / pa; + pixels[p] = ((r_sum * mul_sum) >> shg_sum ) * pa; + pixels[p+1] = ((g_sum * mul_sum) >> shg_sum ) * pa; + pixels[p+2] = ((b_sum * mul_sum) >> shg_sum ) * pa; + } else { + pixels[p] = pixels[p+1] = pixels[p+2] = 0; + } + + r_sum -= r_out_sum; + g_sum -= g_out_sum; + b_sum -= b_out_sum; + a_sum -= a_out_sum; + + r_out_sum -= stackIn.r; + g_out_sum -= stackIn.g; + b_out_sum -= stackIn.b; + a_out_sum -= stackIn.a; + + p = ( x + (( ( p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1 ) * width )) << 2; + + r_sum += ( r_in_sum += ( stackIn.r = pixels[p])); + g_sum += ( g_in_sum += ( stackIn.g = pixels[p+1])); + b_sum += ( b_in_sum += ( stackIn.b = pixels[p+2])); + a_sum += ( a_in_sum += ( stackIn.a = pixels[p+3])); + + stackIn = stackIn.next; + + r_out_sum += ( pr = stackOut.r ); + g_out_sum += ( pg = stackOut.g ); + b_out_sum += ( pb = stackOut.b ); + a_out_sum += ( pa = stackOut.a ); + + r_in_sum -= pr; + g_in_sum -= pg; + b_in_sum -= pb; + a_in_sum -= pa; + + stackOut = stackOut.next; + + yi += width; + } + } + + context.putImageData( imageData, top_x, top_y ); + +} + + +function stackBlurCanvasRGB( id, top_x, top_y, width, height, radius ) +{ + if ( isNaN(radius) || radius < 1 ) return; + radius |= 0; + + var canvas = document.getElementById( id ); + var context = canvas.getContext("2d"); + var imageData; + + try { + try { + imageData = context.getImageData( top_x, top_y, width, height ); + } catch(e) { + + // NOTE: this part is supposedly only needed if you want to work with local files + // so it might be okay to remove the whole try/catch block and just use + // imageData = context.getImageData( top_x, top_y, width, height ); + try { + netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead"); + imageData = context.getImageData( top_x, top_y, width, height ); + } catch(e) { + alert("Cannot access local image"); + throw new Error("unable to access local image data: " + e); + return; + } + } + } catch(e) { + alert("Cannot access image"); + throw new Error("unable to access image data: " + e); + } + + var pixels = imageData.data; + + var x, y, i, p, yp, yi, yw, r_sum, g_sum, b_sum, + r_out_sum, g_out_sum, b_out_sum, + r_in_sum, g_in_sum, b_in_sum, + pr, pg, pb, rbs; + + var div = radius + radius + 1; + var w4 = width << 2; + var widthMinus1 = width - 1; + var heightMinus1 = height - 1; + var radiusPlus1 = radius + 1; + var sumFactor = radiusPlus1 * ( radiusPlus1 + 1 ) / 2; + + var stackStart = new BlurStack(); + var stack = stackStart; + for ( i = 1; i < div; i++ ) + { + stack = stack.next = new BlurStack(); + if ( i == radiusPlus1 ) var stackEnd = stack; + } + stack.next = stackStart; + var stackIn = null; + var stackOut = null; + + yw = yi = 0; + + var mul_sum = mul_table[radius]; + var shg_sum = shg_table[radius]; + + for ( y = 0; y < height; y++ ) + { + r_in_sum = g_in_sum = b_in_sum = r_sum = g_sum = b_sum = 0; + + r_out_sum = radiusPlus1 * ( pr = pixels[yi] ); + g_out_sum = radiusPlus1 * ( pg = pixels[yi+1] ); + b_out_sum = radiusPlus1 * ( pb = pixels[yi+2] ); + + r_sum += sumFactor * pr; + g_sum += sumFactor * pg; + b_sum += sumFactor * pb; + + stack = stackStart; + + for( i = 0; i < radiusPlus1; i++ ) + { + stack.r = pr; + stack.g = pg; + stack.b = pb; + stack = stack.next; + } + + for( i = 1; i < radiusPlus1; i++ ) + { + p = yi + (( widthMinus1 < i ? widthMinus1 : i ) << 2 ); + r_sum += ( stack.r = ( pr = pixels[p])) * ( rbs = radiusPlus1 - i ); + g_sum += ( stack.g = ( pg = pixels[p+1])) * rbs; + b_sum += ( stack.b = ( pb = pixels[p+2])) * rbs; + + r_in_sum += pr; + g_in_sum += pg; + b_in_sum += pb; + + stack = stack.next; + } + + + stackIn = stackStart; + stackOut = stackEnd; + for ( x = 0; x < width; x++ ) + { + pixels[yi] = (r_sum * mul_sum) >> shg_sum; + pixels[yi+1] = (g_sum * mul_sum) >> shg_sum; + pixels[yi+2] = (b_sum * mul_sum) >> shg_sum; + + r_sum -= r_out_sum; + g_sum -= g_out_sum; + b_sum -= b_out_sum; + + r_out_sum -= stackIn.r; + g_out_sum -= stackIn.g; + b_out_sum -= stackIn.b; + + p = ( yw + ( ( p = x + radius + 1 ) < widthMinus1 ? p : widthMinus1 ) ) << 2; + + r_in_sum += ( stackIn.r = pixels[p]); + g_in_sum += ( stackIn.g = pixels[p+1]); + b_in_sum += ( stackIn.b = pixels[p+2]); + + r_sum += r_in_sum; + g_sum += g_in_sum; + b_sum += b_in_sum; + + stackIn = stackIn.next; + + r_out_sum += ( pr = stackOut.r ); + g_out_sum += ( pg = stackOut.g ); + b_out_sum += ( pb = stackOut.b ); + + r_in_sum -= pr; + g_in_sum -= pg; + b_in_sum -= pb; + + stackOut = stackOut.next; + + yi += 4; + } + yw += width; + } + + + for ( x = 0; x < width; x++ ) + { + g_in_sum = b_in_sum = r_in_sum = g_sum = b_sum = r_sum = 0; + + yi = x << 2; + r_out_sum = radiusPlus1 * ( pr = pixels[yi]); + g_out_sum = radiusPlus1 * ( pg = pixels[yi+1]); + b_out_sum = radiusPlus1 * ( pb = pixels[yi+2]); + + r_sum += sumFactor * pr; + g_sum += sumFactor * pg; + b_sum += sumFactor * pb; + + stack = stackStart; + + for( i = 0; i < radiusPlus1; i++ ) + { + stack.r = pr; + stack.g = pg; + stack.b = pb; + stack = stack.next; + } + + yp = width; + + for( i = 1; i <= radius; i++ ) + { + yi = ( yp + x ) << 2; + + r_sum += ( stack.r = ( pr = pixels[yi])) * ( rbs = radiusPlus1 - i ); + g_sum += ( stack.g = ( pg = pixels[yi+1])) * rbs; + b_sum += ( stack.b = ( pb = pixels[yi+2])) * rbs; + + r_in_sum += pr; + g_in_sum += pg; + b_in_sum += pb; + + stack = stack.next; + + if( i < heightMinus1 ) + { + yp += width; + } + } + + yi = x; + stackIn = stackStart; + stackOut = stackEnd; + for ( y = 0; y < height; y++ ) + { + p = yi << 2; + pixels[p] = (r_sum * mul_sum) >> shg_sum; + pixels[p+1] = (g_sum * mul_sum) >> shg_sum; + pixels[p+2] = (b_sum * mul_sum) >> shg_sum; + + r_sum -= r_out_sum; + g_sum -= g_out_sum; + b_sum -= b_out_sum; + + r_out_sum -= stackIn.r; + g_out_sum -= stackIn.g; + b_out_sum -= stackIn.b; + + p = ( x + (( ( p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1 ) * width )) << 2; + + r_sum += ( r_in_sum += ( stackIn.r = pixels[p])); + g_sum += ( g_in_sum += ( stackIn.g = pixels[p+1])); + b_sum += ( b_in_sum += ( stackIn.b = pixels[p+2])); + + stackIn = stackIn.next; + + r_out_sum += ( pr = stackOut.r ); + g_out_sum += ( pg = stackOut.g ); + b_out_sum += ( pb = stackOut.b ); + + r_in_sum -= pr; + g_in_sum -= pg; + b_in_sum -= pb; + + stackOut = stackOut.next; + + yi += width; + } + } + + context.putImageData( imageData, top_x, top_y ); + +} + +function BlurStack() +{ + this.r = 0; + this.g = 0; + this.b = 0; + this.a = 0; + this.next = null; +} \ No newline at end of file