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"
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COPYRIGHT (c) 1993 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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1
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Image subclass:#Depth24Image
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'Graphics-Display Objects'
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!
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3
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Depth24Image comment:'
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COPYRIGHT (c) 1993 by Claus Gittinger
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All Rights Reserved
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46
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'!
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3
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46
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!Depth24Image class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1993 by Claus Gittinger
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All Rights Reserved
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3
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46
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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3
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46
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version
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"
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$Header: /cvs/stx/stx/libview/Depth24Image.st,v 1.5 1994-06-03 00:52:14 claus Exp $
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"
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!
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documentation
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"
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this class represents true-color (24 bit / pixel) images.
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It mainly consists of methods already implemented in Image,
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reimplemented here for more performance.
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"
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! !
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3
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1
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!Depth24Image methodsFor:'accessing'!
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bitsPerPixel
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"return the number of bits per pixel"
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^ 24
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!
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bitsPerRow
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"return the number of bits in one scanline of the image"
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^ width * 24
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!
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bitsPerSample
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"return the number of bits per sample.
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The return value is an array of bits-per-plane."
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^ #(8 8 8)
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!
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bytesPerRow
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"return the number of bytes in one scanline of the image"
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^ width * 3
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!
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samplesPerPixel
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"return the number of samples per pixel in the image."
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^ 3
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!
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atX:x y:y
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"retrieve a pixel at x/y; return a color.
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Pixels start at x=0 , y=0 for upper left pixel, end at
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x = width-1, y=height-1 for lower right pixel"
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92 |
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38
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|index "{ Class: SmallInteger }"
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rVal gVal bVal|
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1
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index := 1 + (((width * y) + x) * 3).
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rVal := bytes at:(index).
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gVal := bytes at:(index + 1).
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bVal := bytes at:(index + 2).
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photometric ~~ #rgb ifTrue:[
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self error:'format not supported'.
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^ nil
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].
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^ Color red:rVal * 100 / 255
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green:gVal * 100 / 255
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blue:bVal * 100 / 255
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!
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109 |
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valueAtX:x y:y
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"retrieve a pixel at x/y; return a color.
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Pixels start at x=0 , y=0 for upper left pixel, end at
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x = width-1, y=height-1 for lower right pixel"
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114 |
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|index "{ Class: SmallInteger }"
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rVal "{ Class: SmallInteger }"
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gVal "{ Class: SmallInteger }"
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bVal "{ Class: SmallInteger }"|
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119 |
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index := 1 + (((width * y) + x) * 3).
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rVal := bytes at:(index).
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gVal := bytes at:(index + 1).
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bVal := bytes at:(index + 2).
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^ (((rVal bitShift:8) bitOr:gVal) bitShift:8) bitOr:bVal
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!
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126 |
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atX:x y:y putValue:aPixelValue
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"set a pixel at x/y to aPixelValue, which is 24 bits RGB.
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Pixels start at x=0 , y=0 for upper left pixel, end at
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x = width-1, y=height-1 for lower right pixel"
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131 |
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|index "{ Class: SmallInteger }"
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val "{ Class: SmallInteger }" |
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index := 1 + (((width * y) + x) * 3).
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val := aPixelValue.
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bytes at:(index + 2) put:(val bitAnd:16rFF).
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val := val bitShift:-8.
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bytes at:(index + 1) put:(val bitAnd:16rFF).
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val := val bitShift:-8.
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bytes at:(index) put:val.
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!
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143 |
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atY:y from:xLow to:xHigh do:aBlock
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"perform aBlock for each pixel from x1 to x2 in row y.
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The block is passed the color at each pixel.
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This method allows slighly faster processing of an
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image than using atX:y:, since some processing can be
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avoided when going from pixel to pixel. However, for
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real image processing, specialized methods should be written."
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151 |
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|srcIndex "{ Class: SmallInteger }"
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x1 "{ Class: SmallInteger }"
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x2 "{ Class: SmallInteger }"
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rVal "{ Class: SmallInteger }"
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gVal "{ Class: SmallInteger }"
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bVal "{ Class: SmallInteger }"
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lastR lastG lastB lastColor|
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159 |
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photometric ~~ #rgb ifTrue:[
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self error:'format not supported'.
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^ nil
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].
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164 |
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x1 := xLow.
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x2 := xHigh.
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167 |
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srcIndex := 1 + (((width * y) + x1) * 3).
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x1 to:x2 do:[:x |
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rVal := bytes at:(srcIndex).
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gVal := bytes at:(srcIndex + 1).
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bVal := bytes at:(srcIndex + 2).
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srcIndex := srcIndex + 3.
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(rVal == lastR and:[gVal == lastG and:[bVal == lastB]]) ifFalse:[
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lastColor := Color red:rVal * 100 / 255
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green:gVal * 100 / 255
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blue:bVal * 100 / 255.
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lastR := rVal.
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lastG := gVal.
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lastB := bVal.
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].
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aBlock value:x value:lastColor
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]
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! !
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186 |
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!Depth24Image methodsFor:'converting rgb images'!
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188 |
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rgbImageAsGreyFormOn:aDevice
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"convert an rgb image to a grey image for greyscale displays"
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|deviceDepth|
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deviceDepth := aDevice depth.
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195 |
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"I have specially tuned methods for monochrome"
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(deviceDepth == 1) ifTrue:[
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DitherAlgorithm == #error ifTrue:[
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^ self rgbImageAsErrorDitheredGreyFormOn:aDevice
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].
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DitherAlgorithm == #pattern ifTrue:[
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^ self rgbImageAsPatternDitheredGreyFormOn:aDevice
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].
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^ self rgbImageAsMonoFormOn:aDevice
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].
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206 |
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"and for 2plane greyscale (i.e. NeXTs)"
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(deviceDepth == 2) ifTrue:[
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DitherAlgorithm == #error ifTrue:[
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^ self rgbImageAsErrorDitheredGreyFormOn:aDevice
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].
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DitherAlgorithm == #pattern ifTrue:[
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^ self rgbImageAsPatternDitheredGreyFormOn:aDevice
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].
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^ self rgbImageAs2PlaneFormOn:aDevice
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].
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217 |
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(deviceDepth == 8) ifTrue:[
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^ self rgbImageAs8BitGreyFormOn:aDevice
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].
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221 |
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222 |
"mhmh need another converter ...
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223 |
till then we do:"
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224 |
DitherAlgorithm == #error ifTrue:[
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^ self rgbImageAsErrorDitheredGreyFormOn:aDevice
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].
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DitherAlgorithm == #pattern ifTrue:[
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^ self rgbImageAsPatternDitheredGreyFormOn:aDevice
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].
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^ self rgbImageAsMonoFormOn:aDevice
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!
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232 |
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rgbImageAsMonoFormOn:aDevice
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"return a 1-bit monochrome form for aDevice from the rgb picture,
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using a threshold algorithm.
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(i.e. grey value < 0.5 -> black, grey value >= 0.5 -> white)."
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237 |
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|monoBits f
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w "{ Class: SmallInteger }"
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h "{ Class: SmallInteger }"
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r "{ Class: SmallInteger }"
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g "{ Class: SmallInteger }"
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b "{ Class: SmallInteger }"
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v "{ Class: SmallInteger }"
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map rMap gMap bMap
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srcIndex "{ Class: SmallInteger }"
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dstIndex "{ Class: SmallInteger }"
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bits "{ Class: SmallInteger }"
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bitCount "{ Class: SmallInteger }"
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fast |
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251 |
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w := width.
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h := height.
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monoBits := ByteArray uninitializedNew:(((w + 7) // 8) * h).
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fast := false.
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%{
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257 |
register unsigned char *srcPtr, *dstPtr;
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258 |
register _v, _bits, _bitCount;
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register j;
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260 |
register i;
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261 |
extern OBJ ByteArray;
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262 |
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35
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263 |
if (__isByteArray(_INST(bytes)) && __isByteArray(monoBits)) {
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1
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fast = true;
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srcPtr = _ByteArrayInstPtr(_INST(bytes))->ba_element;
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dstPtr = _ByteArrayInstPtr(monoBits)->ba_element;
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267 |
for (i=_intVal(h); i>0; i--) {
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268 |
_bitCount = 0;
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269 |
_bits = 0;
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270 |
for (j=_intVal(w); j>0; j--) {
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271 |
_bits <<= 1;
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272 |
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273 |
_v = (*srcPtr++ * 3); /* 0.3*r + 0.6*g + b */
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274 |
_v += (*srcPtr++ * 6);
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275 |
_v += *srcPtr++;
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276 |
_v /= 10;
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277 |
if (_v & 0x80)
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278 |
_bits |= 1;
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279 |
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280 |
_bitCount++;
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281 |
if (_bitCount == 8) {
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282 |
*dstPtr++ = _bits;
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283 |
_bits = 0;
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284 |
_bitCount = 0;
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285 |
}
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286 |
}
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287 |
if (_bitCount != 0) {
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288 |
while (_bitCount++ != 8) _bits <<= 1;
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289 |
*dstPtr++ = _bits;
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290 |
}
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291 |
}
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292 |
}
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293 |
%}
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294 |
.
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295 |
fast ifFalse:[
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296 |
srcIndex := 1.
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297 |
dstIndex := 1.
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298 |
1 to:h do:[:row |
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299 |
bitCount := 0.
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300 |
bits := 0.
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301 |
1 to:w do:[:col |
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302 |
bits := bits bitShift:1.
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303 |
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304 |
r := bytes at:srcIndex.
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305 |
srcIndex := srcIndex + 1.
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306 |
g := bytes at:srcIndex.
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307 |
srcIndex := srcIndex + 1.
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308 |
b := bytes at:srcIndex.
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309 |
srcIndex := srcIndex + 1.
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|
310 |
v := ((3 * r) + (6 * g) + (1 * b)) // 10.
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311 |
((v bitAnd:16r80) == 0) ifFalse:[
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312 |
bits := bits bitOr:1
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313 |
].
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314 |
bitCount := bitCount + 1.
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315 |
(bitCount == 8) ifTrue:[
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316 |
monoBits at:dstIndex put:bits.
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317 |
dstIndex := dstIndex + 1.
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318 |
bits := 0.
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319 |
bitCount := 0
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|
320 |
]
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321 |
].
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322 |
(bitCount ~~ 0) ifTrue:[
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|
323 |
[bitCount == 8] whileFalse:[
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324 |
bitCount := bitCount + 1.
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325 |
bits := bits bitShift:1.
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|
326 |
].
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327 |
monoBits at:dstIndex put:bits.
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|
328 |
dstIndex := dstIndex + 1
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329 |
]
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|
330 |
]
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331 |
].
|
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332 |
|
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|
333 |
f := Form width:w height:h depth:1 on:aDevice.
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|
334 |
f isNil ifTrue:[^ nil].
|
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|
335 |
f initGC.
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|
336 |
(aDevice blackpixel == 0) ifFalse:[
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|
337 |
"have to invert bits"
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|
338 |
f function:#copyInverted
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|
339 |
].
|
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|
340 |
aDevice drawBits:monoBits depth:1 width:w height:h
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341 |
x:0 y:0
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|
342 |
into:(f id) x:0 y:0 width:w height:h with:(f gcId).
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|
343 |
^ f
|
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|
344 |
!
|
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|
345 |
|
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|
346 |
rgbImageAs2PlaneFormOn:aDevice
|
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|
347 |
"return a 2-bit device form for aDevice from the rgb picture,
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|
348 |
using a threshold algorithm.
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|
349 |
(i.e. grey value < 0.25 -> black // 0.25..0.5 -> darkgrey //
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|
350 |
0.5 .. 0.75 -> lightgrey // > 0.75 -> white)."
|
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351 |
|
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|
352 |
|twoPlaneBits f
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|
353 |
map rMap gMap bMap
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|
354 |
fast
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|
355 |
r "{ Class: SmallInteger }"
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|
356 |
g "{ Class: SmallInteger }"
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|
357 |
b "{ Class: SmallInteger }"
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|
358 |
v "{ Class: SmallInteger }"
|
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|
359 |
w "{ Class: SmallInteger }"
|
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|
360 |
h "{ Class: SmallInteger }"
|
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|
361 |
srcIndex "{ Class: SmallInteger }"
|
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|
362 |
dstIndex "{ Class: SmallInteger }"
|
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|
363 |
bits "{ Class: SmallInteger }"
|
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|
364 |
bitCount "{ Class: SmallInteger }" |
|
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|
365 |
|
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|
366 |
w := width.
|
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|
367 |
h := height.
|
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|
368 |
twoPlaneBits := ByteArray uninitializedNew:(((w * 2 + 7) // 8) * h).
|
|
|
369 |
|
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|
370 |
fast := false.
|
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|
371 |
%{
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|
372 |
register unsigned char *srcPtr, *dstPtr;
|
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|
373 |
register _v, _bits, _bitCount;
|
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|
374 |
register j;
|
|
|
375 |
register i;
|
|
|
376 |
extern OBJ ByteArray;
|
|
|
377 |
|
|
|
378 |
if ((_Class(_INST(bytes)) == ByteArray)
|
|
|
379 |
&& (_Class(twoPlaneBits) == ByteArray)) {
|
|
|
380 |
fast = true;
|
|
|
381 |
srcPtr = _ByteArrayInstPtr(_INST(bytes))->ba_element;
|
|
|
382 |
dstPtr = _ByteArrayInstPtr(twoPlaneBits)->ba_element;
|
|
|
383 |
for (i=_intVal(h); i>0; i--) {
|
|
|
384 |
_bitCount = 0;
|
|
|
385 |
_bits = 0;
|
|
|
386 |
for (j=_intVal(w); j>0; j--) {
|
|
|
387 |
_v = (*srcPtr++ * 3); /* 0.3*r + 0.6*g + b */
|
|
|
388 |
_v += (*srcPtr++ * 6);
|
|
|
389 |
_v += *srcPtr++;
|
|
|
390 |
_v /= 10;
|
|
|
391 |
_bits <<= 2;
|
|
|
392 |
_bits |= (_v >> 6); /* take top 2 bits */
|
|
|
393 |
_bitCount++;
|
|
|
394 |
if (_bitCount == 4) {
|
|
|
395 |
*dstPtr++ = _bits;
|
|
|
396 |
_bits = 0;
|
|
|
397 |
_bitCount = 0;
|
|
|
398 |
}
|
|
|
399 |
}
|
|
|
400 |
if (_bitCount != 0) {
|
|
|
401 |
while (_bitCount++ != 4) _bits <<= 2;
|
|
|
402 |
*dstPtr++ = _bits;
|
|
|
403 |
}
|
|
|
404 |
}
|
|
|
405 |
}
|
|
|
406 |
%}
|
|
|
407 |
.
|
|
|
408 |
fast ifFalse:[
|
|
|
409 |
srcIndex := 1.
|
|
|
410 |
dstIndex := 1.
|
|
|
411 |
1 to:h do:[:row |
|
|
|
412 |
bitCount := 0.
|
|
|
413 |
bits := 0.
|
|
|
414 |
1 to:w do:[:col |
|
|
|
415 |
r := bytes at:srcIndex.
|
|
|
416 |
srcIndex := srcIndex + 1.
|
|
|
417 |
g := bytes at:srcIndex.
|
|
|
418 |
srcIndex := srcIndex + 1.
|
|
|
419 |
b := bytes at:srcIndex.
|
|
|
420 |
srcIndex := srcIndex + 1.
|
|
|
421 |
v := ((3 * r) + (6 * g) + (1 * b)) // 10.
|
|
|
422 |
v := v bitShift:-6. "take 2 hi bits"
|
|
|
423 |
bits := (bits bitShift:2) bitOr:v.
|
|
|
424 |
bitCount := bitCount + 1.
|
|
|
425 |
(bitCount == 4) ifTrue:[
|
|
|
426 |
twoPlaneBits at:dstIndex put:bits.
|
|
|
427 |
dstIndex := dstIndex + 1.
|
|
|
428 |
bits := 0.
|
|
|
429 |
bitCount := 0
|
|
|
430 |
]
|
|
|
431 |
].
|
|
|
432 |
(bitCount ~~ 0) ifTrue:[
|
|
|
433 |
[bitCount == 4] whileFalse:[
|
|
|
434 |
bitCount := bitCount + 1.
|
|
|
435 |
bits := bits bitShift:2.
|
|
|
436 |
].
|
|
|
437 |
twoPlaneBits at:dstIndex put:bits.
|
|
|
438 |
dstIndex := dstIndex + 1
|
|
|
439 |
]
|
|
|
440 |
]
|
|
|
441 |
].
|
|
|
442 |
|
|
|
443 |
f := Form width:width height:height depth:2 on:aDevice.
|
|
|
444 |
f isNil ifTrue:[^ nil].
|
|
|
445 |
f initGC.
|
|
|
446 |
(aDevice blackpixel == 0) ifFalse:[
|
|
|
447 |
"have to invert bits"
|
|
|
448 |
f function:#copyInverted
|
|
|
449 |
].
|
|
|
450 |
aDevice drawBits:twoPlaneBits depth:2 width:width height:height
|
|
|
451 |
x:0 y:0
|
|
|
452 |
into:(f id) x:0 y:0 width:width height:height with:(f gcId).
|
|
|
453 |
^ f
|
|
|
454 |
!
|
|
|
455 |
|
|
|
456 |
rgbImageAs8BitGreyFormOn:aDevice
|
|
|
457 |
"return an 8-bit greyForm from the rgb picture"
|
|
|
458 |
|
|
|
459 |
|greyBits f v
|
|
|
460 |
srcIndex "{ Class: SmallInteger }"
|
|
|
461 |
dstIndex "{ Class: SmallInteger }"
|
|
|
462 |
fast|
|
|
|
463 |
|
|
|
464 |
greyBits := ByteArray uninitializedNew:(width * height).
|
|
|
465 |
fast := false.
|
|
|
466 |
%{
|
|
|
467 |
register unsigned char *srcPtr, *dstPtr;
|
|
|
468 |
register _v;
|
|
|
469 |
register j;
|
|
|
470 |
register i;
|
|
|
471 |
extern OBJ ByteArray;
|
|
|
472 |
|
|
|
473 |
if ((_Class(_INST(bytes)) == ByteArray)
|
|
|
474 |
&& (_Class(greyBits) == ByteArray)) {
|
|
|
475 |
fast = true;
|
|
|
476 |
srcPtr = _ByteArrayInstPtr(_INST(bytes))->ba_element;
|
|
|
477 |
dstPtr = _ByteArrayInstPtr(greyBits)->ba_element;
|
|
|
478 |
for (i=_intVal(_INST(height)); i>0; i--) {
|
|
|
479 |
for (j=_intVal(_INST(width)); j>0; j--) {
|
|
|
480 |
_v = (*srcPtr * 3); /* 0.3*r + 0.6*g + b */
|
|
|
481 |
_v += (*srcPtr++ * 6);
|
|
|
482 |
_v += *srcPtr++;
|
|
|
483 |
_v /= 10;
|
|
|
484 |
*dstPtr++ = _v >> 4 ;
|
|
|
485 |
}
|
|
|
486 |
}
|
|
|
487 |
}
|
|
|
488 |
%}
|
|
|
489 |
.
|
|
|
490 |
fast ifFalse:[
|
|
|
491 |
srcIndex := 1.
|
|
|
492 |
dstIndex := 1.
|
|
|
493 |
|
|
|
494 |
1 to:height do:[:h |
|
|
|
495 |
1 to:width do:[:w |
|
|
|
496 |
|v
|
|
|
497 |
r "{ Class: SmallInteger }"
|
|
|
498 |
g "{ Class: SmallInteger }"
|
|
|
499 |
b "{ Class: SmallInteger }"|
|
|
|
500 |
|
|
|
501 |
r := bytes at:srcIndex.
|
|
|
502 |
srcIndex := srcIndex + 1.
|
|
|
503 |
g := bytes at:srcIndex.
|
|
|
504 |
srcIndex := srcIndex + 1.
|
|
|
505 |
b := bytes at:srcIndex.
|
|
|
506 |
srcIndex := srcIndex + 1.
|
|
|
507 |
|
|
|
508 |
v := ((3 * r) + (6 * g) + (1 * b)) // 10.
|
|
|
509 |
v := v bitShift:-4.
|
|
|
510 |
greyBits at:dstIndex put:v.
|
|
|
511 |
dstIndex := dstIndex + 1
|
|
|
512 |
]
|
|
|
513 |
]
|
|
|
514 |
].
|
|
|
515 |
|
|
|
516 |
f := Form width:width height:height depth:8 on:aDevice.
|
|
|
517 |
f isNil ifTrue:[^ nil].
|
|
|
518 |
f initGC.
|
|
|
519 |
aDevice drawBits:greyBits depth:8 width:width height:height
|
|
|
520 |
x:0 y:0
|
|
|
521 |
into:(f id) x:0 y:0
|
|
|
522 |
width:width height:height with:(f gcId).
|
|
|
523 |
^ f
|
|
|
524 |
!
|
|
|
525 |
|
|
|
526 |
rgbImageAsPatternDitheredGreyFormOn:aDevice
|
|
|
527 |
"return a dithered greyForm for aDevice from the palette picture.
|
|
|
528 |
works for any destination depth.
|
|
|
529 |
A slow algorithm, using draw into the form (which indirectly does
|
|
|
530 |
the dither) - should be rewritten."
|
|
|
531 |
|
|
|
532 |
|f depth
|
|
|
533 |
nDither "{Class: SmallInteger }"
|
|
|
534 |
nColors "{Class: SmallInteger }"
|
|
|
535 |
v "{Class: SmallInteger }"
|
|
|
536 |
h "{Class: SmallInteger }"
|
|
|
537 |
w "{Class: SmallInteger }"
|
|
|
538 |
srcIndex "{Class: SmallInteger }"
|
|
|
539 |
dstIndex "{Class: SmallInteger }"
|
|
|
540 |
mask "{Class: SmallInteger }"
|
|
|
541 |
outBits "{Class: SmallInteger }"
|
|
|
542 |
outCount "{Class: SmallInteger }"
|
|
|
543 |
patternOffset "{Class: SmallInteger }"
|
|
|
544 |
patternBits "{Class: SmallInteger }"
|
|
|
545 |
run "{Class: SmallInteger }"
|
|
|
546 |
r "{Class: SmallInteger }"
|
|
|
547 |
g "{Class: SmallInteger }"
|
|
|
548 |
b "{Class: SmallInteger }"
|
|
|
549 |
index "{Class: SmallInteger }"
|
|
|
550 |
p0 "{Class: SmallInteger }"
|
|
|
551 |
p1 "{Class: SmallInteger }"
|
|
|
552 |
map last clr
|
|
|
553 |
patterns formBytes patternBytes
|
|
|
554 |
pixel0bytes pixel1bytes ditherPattern
|
|
|
555 |
ditherColors first delta|
|
|
|
556 |
|
|
|
557 |
Transcript showCr:'dithering ..'. Transcript endEntry.
|
|
|
558 |
|
|
|
559 |
h := height.
|
|
|
560 |
w := width.
|
|
|
561 |
|
|
|
562 |
nDither := NumberOfDitherColors.
|
|
|
563 |
ditherColors := Array new:nDither.
|
|
|
564 |
|
|
|
565 |
first := (100 / nDither / 2).
|
|
|
566 |
delta := 100 / nDither.
|
|
|
567 |
0 to:nDither-1 do:[:i |
|
|
|
568 |
ditherColors at:i+1 put:(Color grey:(i * delta + first)).
|
|
|
569 |
].
|
|
|
570 |
|
|
|
571 |
nColors := 256.
|
|
|
572 |
map := Array new:256.
|
|
|
573 |
1 to:256 do:[:i |
|
|
|
574 |
v := i - 1.
|
|
|
575 |
" v is now in the range 0 .. 255 "
|
|
|
576 |
v := (v * (nDither - 1) // 255) rounded.
|
|
|
577 |
" v is now 0 .. nDither-1 "
|
|
|
578 |
map at:i put:(ditherColors at:(v + 1))
|
|
|
579 |
].
|
|
|
580 |
|
|
|
581 |
"tuning - code below is so slooow"
|
|
|
582 |
|
|
|
583 |
"get the patterns, fill form bytes here"
|
|
|
584 |
|
|
|
585 |
w := width.
|
|
|
586 |
h := height.
|
|
|
587 |
|
|
|
588 |
depth := aDevice depth.
|
|
|
589 |
depth == 1 ifTrue:[
|
|
|
590 |
formBytes := ByteArray uninitializedNew:(w + 7 // 8) * h.
|
|
|
591 |
patterns := Array new:nColors.
|
|
|
592 |
pixel0bytes := ByteArray uninitializedNew:nColors.
|
|
|
593 |
pixel1bytes := ByteArray uninitializedNew:nColors.
|
|
|
594 |
|
|
|
595 |
"extract dither patterns and values to use for 1/0 bits
|
|
|
596 |
in those from the dithercolors"
|
|
|
597 |
|
|
|
598 |
1 to:nColors do:[:i |
|
|
|
599 |
clr := (map at:i) on:aDevice.
|
|
|
600 |
ditherPattern := clr ditherForm.
|
|
|
601 |
|
|
|
602 |
ditherPattern isNil ifTrue:[
|
|
|
603 |
patterns at:i put:#[2r11111111
|
|
|
604 |
2r11111111
|
|
|
605 |
2r11111111
|
|
|
606 |
2r11111111
|
|
|
607 |
2r11111111
|
|
|
608 |
2r11111111
|
|
|
609 |
2r11111111
|
|
|
610 |
2r11111111].
|
|
|
611 |
pixel0bytes at:i put:clr colorId.
|
|
|
612 |
pixel1bytes at:i put:clr colorId
|
|
|
613 |
] ifFalse:[
|
|
|
614 |
patterns at:i put:(ditherPattern bits).
|
|
|
615 |
pixel0bytes at:i put:(ditherPattern colorMap at:1) colorId.
|
|
|
616 |
pixel1bytes at:i put:(ditherPattern colorMap at:2) colorId.
|
|
|
617 |
].
|
|
|
618 |
].
|
|
|
619 |
|
|
|
620 |
srcIndex := 1.
|
|
|
621 |
dstIndex := 1.
|
|
|
622 |
mask := 16r80.
|
|
|
623 |
outBits := 0.
|
|
|
624 |
patternOffset := 1.
|
|
|
625 |
1 to:h do:[:dstY |
|
|
|
626 |
last := nil.
|
|
|
627 |
1 to:w do:[:dstX |
|
|
|
628 |
r := bytes at:srcIndex.
|
|
|
629 |
g := bytes at:(srcIndex + 1).
|
|
|
630 |
b := bytes at:(srcIndex + 2).
|
|
|
631 |
srcIndex := srcIndex + 3.
|
|
|
632 |
|
|
|
633 |
v := ((3 * r) + (6 * g) + (1 * b)). "pixel grey value (*10)"
|
|
|
634 |
v == last ifFalse:[
|
|
|
635 |
index := v // 10 + 1. "index into map"
|
|
|
636 |
|
|
|
637 |
patternBytes := patterns at:index. "dither pattern for color"
|
|
|
638 |
patternBits := patternBytes at:patternOffset. "dither row"
|
|
|
639 |
p0 := pixel0bytes at:index. "value for 0-dither bit"
|
|
|
640 |
p1 := pixel1bytes at:index. "value for 1-dither bit"
|
|
|
641 |
last := v.
|
|
|
642 |
].
|
|
|
643 |
outBits := outBits bitShift:1.
|
|
|
644 |
|
|
|
645 |
(patternBits bitAnd:mask) == 0 ifTrue:[
|
|
|
646 |
outBits := outBits bitOr:p0.
|
|
|
647 |
] ifFalse:[
|
|
|
648 |
outBits := outBits bitOr:p1
|
|
|
649 |
].
|
|
|
650 |
mask := mask bitShift:-1.
|
|
|
651 |
mask == 0 ifTrue:[
|
|
|
652 |
mask := 16r80.
|
|
|
653 |
formBytes at:dstIndex put:outBits.
|
|
|
654 |
dstIndex := dstIndex + 1.
|
|
|
655 |
outBits := 0
|
|
|
656 |
]
|
|
|
657 |
].
|
|
|
658 |
mask == 16r80 ifFalse:[
|
|
|
659 |
[mask == 0] whileFalse:[
|
|
|
660 |
mask := mask bitShift:-1.
|
|
|
661 |
outBits := outBits bitShift:1.
|
|
|
662 |
].
|
|
|
663 |
formBytes at:dstIndex put:outBits.
|
|
|
664 |
dstIndex := dstIndex + 1.
|
|
|
665 |
mask := 16r80.
|
|
|
666 |
outBits := 0
|
|
|
667 |
].
|
|
|
668 |
patternOffset := patternOffset + 1.
|
|
|
669 |
patternOffset == 9 ifTrue:[
|
|
|
670 |
patternOffset := 1
|
|
|
671 |
]
|
|
|
672 |
].
|
|
|
673 |
f := Form width:w height:h fromArray:formBytes.
|
|
|
674 |
^ f
|
|
|
675 |
].
|
|
|
676 |
|
|
|
677 |
depth == 2 ifTrue:[
|
|
|
678 |
formBytes := ByteArray uninitializedNew:(w * 2 + 7 // 8) * h.
|
|
|
679 |
patterns := Array new:nColors.
|
|
|
680 |
pixel0bytes := ByteArray uninitializedNew:nColors.
|
|
|
681 |
pixel1bytes := ByteArray uninitializedNew:nColors.
|
|
|
682 |
|
|
|
683 |
"extract dither patterns and values to use for 1/0 bits
|
|
|
684 |
in those from the dithercolors"
|
|
|
685 |
|
|
|
686 |
1 to:nColors do:[:i |
|
|
|
687 |
clr := (map at:i) on:aDevice.
|
|
|
688 |
ditherPattern := clr ditherForm.
|
|
|
689 |
|
|
|
690 |
ditherPattern isNil ifTrue:[
|
|
|
691 |
patterns at:i put:#[2r11111111
|
|
|
692 |
2r11111111
|
|
|
693 |
2r11111111
|
|
|
694 |
2r11111111
|
|
|
695 |
2r11111111
|
|
|
696 |
2r11111111
|
|
|
697 |
2r11111111
|
|
|
698 |
2r11111111].
|
|
|
699 |
pixel0bytes at:i put:clr colorId.
|
|
|
700 |
pixel1bytes at:i put:clr colorId
|
|
|
701 |
] ifFalse:[
|
|
|
702 |
patterns at:i put:(ditherPattern bits).
|
|
|
703 |
pixel0bytes at:i put:(ditherPattern colorMap at:1) colorId.
|
|
|
704 |
pixel1bytes at:i put:(ditherPattern colorMap at:2) colorId.
|
|
|
705 |
].
|
|
|
706 |
].
|
|
|
707 |
|
|
|
708 |
srcIndex := 1.
|
|
|
709 |
dstIndex := 1.
|
|
|
710 |
mask := 16r80.
|
|
|
711 |
outBits := 0.
|
|
|
712 |
patternOffset := 1.
|
|
|
713 |
1 to:h do:[:dstY |
|
|
|
714 |
last := nil.
|
|
|
715 |
outCount := 0.
|
|
|
716 |
mask := 16r80.
|
|
|
717 |
outBits := 0.
|
|
|
718 |
1 to:w do:[:dstX |
|
|
|
719 |
r := bytes at:srcIndex.
|
|
|
720 |
srcIndex := srcIndex + 1.
|
|
|
721 |
g := bytes at:srcIndex.
|
|
|
722 |
srcIndex := srcIndex + 1.
|
|
|
723 |
b := bytes at:srcIndex.
|
|
|
724 |
srcIndex := srcIndex + 1.
|
|
|
725 |
|
|
|
726 |
v := ((3 * r) + (6 * g) + (1 * b)). "pixel grey value (*10)"
|
|
|
727 |
v == last ifFalse:[
|
|
|
728 |
index := v // 10 + 1. "index into map"
|
|
|
729 |
|
|
|
730 |
patternBytes := patterns at:index. "dither pattern for color"
|
|
|
731 |
patternBits := patternBytes at:patternOffset. "dither row"
|
|
|
732 |
p0 := pixel0bytes at:index. "value for 0-dither bit"
|
|
|
733 |
p1 := pixel1bytes at:index. "value for 1-dither bit"
|
|
|
734 |
last := v.
|
|
|
735 |
].
|
|
|
736 |
outBits := outBits bitShift:2.
|
|
|
737 |
|
|
|
738 |
(patternBits bitAnd:mask) == 0 ifTrue:[
|
|
|
739 |
outBits := outBits bitOr:p0.
|
|
|
740 |
] ifFalse:[
|
|
|
741 |
outBits := outBits bitOr:p1
|
|
|
742 |
].
|
|
|
743 |
mask := mask bitShift:-1.
|
|
|
744 |
outCount := outCount + 1.
|
|
|
745 |
outCount == 4 ifTrue:[
|
|
|
746 |
formBytes at:dstIndex put:outBits.
|
|
|
747 |
dstIndex := dstIndex + 1.
|
|
|
748 |
outBits := 0.
|
|
|
749 |
outCount := 0.
|
|
|
750 |
mask == 0 ifTrue:[
|
|
|
751 |
mask := 16r80.
|
|
|
752 |
]
|
|
|
753 |
]
|
|
|
754 |
].
|
|
|
755 |
(outCount == 0) ifFalse:[
|
|
|
756 |
[outCount == 4] whileFalse:[
|
|
|
757 |
outCount := outCount + 1.
|
|
|
758 |
outBits := outBits bitShift:2.
|
|
|
759 |
].
|
|
|
760 |
formBytes at:dstIndex put:outBits.
|
|
|
761 |
dstIndex := dstIndex + 1.
|
|
|
762 |
].
|
|
|
763 |
patternOffset := patternOffset + 1.
|
|
|
764 |
patternOffset == 9 ifTrue:[
|
|
|
765 |
patternOffset := 1
|
|
|
766 |
]
|
|
|
767 |
].
|
|
|
768 |
f := Form width:w height:h depth:depth.
|
|
|
769 |
f initGC.
|
|
|
770 |
f device drawBits:formBytes depth:2
|
|
|
771 |
width:w height:h x:0 y:0
|
|
|
772 |
into:f id x:0 y:0 width:w height:h with:f gcId.
|
|
|
773 |
^ f
|
|
|
774 |
].
|
|
|
775 |
|
|
|
776 |
"draw each pixel using dither color (let others do the dithering)
|
|
|
777 |
although the code is simple, its very slow"
|
|
|
778 |
|
|
|
779 |
f := Form width:w height:h depth:(aDevice depth) on:aDevice.
|
|
|
780 |
f isNil ifTrue:[^ nil].
|
|
|
781 |
f initGC.
|
|
|
782 |
"draw each pixel using dither color"
|
|
|
783 |
|
|
|
784 |
srcIndex := 1.
|
|
|
785 |
0 to:h-1 do:[:dstY |
|
|
|
786 |
run := 0.
|
|
|
787 |
last := nil.
|
|
|
788 |
0 to:w-1 do:[:dstX |
|
|
|
789 |
r := bytes at:srcIndex.
|
|
|
790 |
srcIndex := srcIndex + 1.
|
|
|
791 |
g := bytes at:srcIndex.
|
|
|
792 |
srcIndex := srcIndex + 1.
|
|
|
793 |
b := bytes at:srcIndex.
|
|
|
794 |
srcIndex := srcIndex + 1.
|
|
|
795 |
|
|
|
796 |
v := ((3 * r) + (6 * g) + (1 * b)) // 10.
|
|
|
797 |
|
|
|
798 |
clr := map at:(v + 1).
|
|
|
799 |
|
|
|
800 |
clr == last ifTrue:[
|
|
|
801 |
run := run + 1
|
|
|
802 |
] ifFalse:[
|
|
|
803 |
(run ~~ 0) ifTrue:[
|
|
|
804 |
f fillRectangleX:dstX-run y:dstY width:run height:1.
|
|
|
805 |
].
|
|
|
806 |
run := 1.
|
|
|
807 |
f paint:clr.
|
|
|
808 |
last := clr
|
|
|
809 |
].
|
|
|
810 |
].
|
|
|
811 |
f fillRectangleX:width-run y:dstY width:run height:1.
|
|
|
812 |
].
|
|
|
813 |
^ f
|
|
|
814 |
|
|
|
815 |
!
|
|
|
816 |
|
|
|
817 |
rgbImageAsPseudoFormOn:aDevice
|
|
|
818 |
"return a pseudocolor form from the rgb-picture"
|
|
|
819 |
|
|
|
820 |
|pseudoBits f
|
|
|
821 |
r "{ Class: SmallInteger }"
|
|
|
822 |
g "{ Class: SmallInteger }"
|
|
|
823 |
b "{ Class: SmallInteger }"
|
|
|
824 |
srcIndex "{ Class: SmallInteger }"
|
|
|
825 |
dstIndex "{ Class: SmallInteger }"
|
|
|
826 |
rMask "{ Class: SmallInteger }"
|
|
|
827 |
gMask "{ Class: SmallInteger }"
|
|
|
828 |
bMask "{ Class: SmallInteger }"
|
|
|
829 |
redArray greenArray blueArray
|
|
|
830 |
dataSize "{ Class: SmallInteger }"
|
|
|
831 |
nColors "{ Class: SmallInteger }"
|
|
|
832 |
fit fitMap colors color
|
|
|
833 |
fast
|
|
|
834 |
colorIndex "{ Class: SmallInteger }"
|
|
|
835 |
depth nColorCells|
|
|
|
836 |
|
|
|
837 |
"find used colors; build color-tree"
|
|
|
838 |
|
|
|
839 |
fit := false.
|
|
|
840 |
fitMap := false.
|
|
|
841 |
depth := aDevice depth.
|
|
|
842 |
nColorCells := aDevice ncells.
|
|
|
843 |
|
|
|
844 |
rMask := 2r11111111.
|
|
|
845 |
gMask := 2r11111111.
|
|
|
846 |
bMask := 2r11111111.
|
|
|
847 |
|
|
|
848 |
[fit] whileFalse:[
|
|
|
849 |
[fitMap] whileFalse:[
|
|
|
850 |
srcIndex := 1.
|
|
|
851 |
redArray := Array new:256.
|
|
|
852 |
|
|
|
853 |
"find used colors"
|
|
|
854 |
|
|
|
855 |
nColors := 0.
|
|
|
856 |
srcIndex := 1.
|
|
|
857 |
dataSize := bytes size.
|
|
|
858 |
[srcIndex < dataSize] whileTrue:[
|
|
|
859 |
%{
|
|
35
|
860 |
if (__isByteArray(_INST(bytes))) {
|
|
1
|
861 |
int sI = _intVal(srcIndex);
|
|
46
|
862 |
unsigned char *cp = _ByteArrayInstPtr(_INST(bytes))->ba_element;
|
|
1
|
863 |
|
|
|
864 |
r = _MKSMALLINT((cp[sI - 1] & _intVal(rMask)) + 1);
|
|
|
865 |
g = _MKSMALLINT((cp[sI] & _intVal(gMask)) + 1);
|
|
|
866 |
b = _MKSMALLINT((cp[sI + 1] & _intVal(bMask)) + 1);
|
|
|
867 |
srcIndex = _MKSMALLINT(sI + 3);
|
|
|
868 |
fast = true;
|
|
|
869 |
} else {
|
|
|
870 |
fast = false;
|
|
|
871 |
}
|
|
|
872 |
%}
|
|
|
873 |
.
|
|
|
874 |
fast ifFalse:[
|
|
|
875 |
r := bytes at:srcIndex.
|
|
|
876 |
r := (r bitAnd:rMask) + 1.
|
|
|
877 |
srcIndex := srcIndex + 1.
|
|
|
878 |
g := bytes at:srcIndex.
|
|
|
879 |
g := (g bitAnd:gMask) + 1.
|
|
|
880 |
srcIndex := srcIndex + 1.
|
|
|
881 |
b := bytes at:srcIndex.
|
|
|
882 |
b := (b bitAnd:bMask) + 1.
|
|
|
883 |
srcIndex := srcIndex + 1
|
|
|
884 |
].
|
|
|
885 |
|
|
|
886 |
greenArray := redArray at:r.
|
|
|
887 |
greenArray isNil ifTrue:[
|
|
|
888 |
greenArray := Array new:256.
|
|
|
889 |
redArray at:r put:greenArray
|
|
|
890 |
].
|
|
|
891 |
blueArray := greenArray at:g.
|
|
|
892 |
blueArray isNil ifTrue:[
|
|
|
893 |
blueArray := Array new:256.
|
|
|
894 |
greenArray at:g put:blueArray
|
|
|
895 |
].
|
|
|
896 |
(blueArray at:b) isNil ifTrue:[
|
|
|
897 |
blueArray at:b put:true.
|
|
|
898 |
nColors := nColors + 1.
|
|
|
899 |
(nColors > nColorCells) ifTrue:[
|
|
46
|
900 |
'D24IMAGE: more than ' errorPrint. nColorCells errorPrint. ' colors' errorPrintNL.
|
|
1
|
901 |
srcIndex := dataSize + 1
|
|
|
902 |
]
|
|
|
903 |
]
|
|
|
904 |
].
|
|
|
905 |
|
|
|
906 |
"again with less color bits if it does not fit colormap"
|
|
|
907 |
|
|
|
908 |
(nColors <= nColorCells) ifTrue:[
|
|
|
909 |
fitMap := true
|
|
|
910 |
] ifFalse:[
|
|
|
911 |
"must try again - cutting off some bits"
|
|
|
912 |
(bMask == 2r11111111) ifTrue:[
|
|
|
913 |
bMask := 2r11111110
|
|
|
914 |
] ifFalse:[
|
|
|
915 |
rMask := (rMask bitShift:1) bitAnd:2r11111111.
|
|
|
916 |
gMask := (gMask bitShift:1) bitAnd:2r11111111.
|
|
|
917 |
bMask := (bMask bitShift:1) bitAnd:2r11111111
|
|
|
918 |
].
|
|
46
|
919 |
'D24IMAGE: retry with less color resolution' errorPrintNL.
|
|
38
|
920 |
"
|
|
1
|
921 |
'masks:' print. rMask print. ' ' print. gMask print. ' ' print.
|
|
|
922 |
bMask printNewline
|
|
38
|
923 |
"
|
|
1
|
924 |
]
|
|
|
925 |
].
|
|
|
926 |
|
|
46
|
927 |
'D24IMAGE: ' errorPrint. nColors errorPrint. ' colors used' errorPrintNL.
|
|
1
|
928 |
colors := Array new:nColors.
|
|
|
929 |
colorIndex := 1.
|
|
|
930 |
|
|
|
931 |
"allocate all used colors"
|
|
|
932 |
|
|
|
933 |
fit := true.
|
|
|
934 |
|
|
|
935 |
r := 0.
|
|
|
936 |
redArray do:[:greenArray |
|
|
|
937 |
(fit and:[greenArray notNil]) ifTrue:[
|
|
|
938 |
g := 0.
|
|
|
939 |
greenArray do:[:blueArray |
|
|
|
940 |
(fit and:[blueArray notNil]) ifTrue:[
|
|
|
941 |
b := 0.
|
|
|
942 |
blueArray do:[:x |
|
|
|
943 |
(fit and:[x notNil]) ifTrue:[
|
|
|
944 |
color := Color red:(r * 100.0 / 255.0)
|
|
|
945 |
green:(g * 100.0 / 255.0)
|
|
|
946 |
blue:(b * 100.0 / 255.0).
|
|
|
947 |
color := color on:aDevice.
|
|
|
948 |
color colorId isNil ifTrue:[
|
|
|
949 |
fit := false
|
|
|
950 |
] ifFalse:[
|
|
|
951 |
colors at:colorIndex put:color.
|
|
|
952 |
colorIndex := colorIndex + 1.
|
|
|
953 |
blueArray at:(b + 1)
|
|
|
954 |
put:color colorId
|
|
|
955 |
]
|
|
|
956 |
].
|
|
|
957 |
b := b + 1
|
|
|
958 |
]
|
|
|
959 |
].
|
|
|
960 |
g := g + 1
|
|
|
961 |
]
|
|
|
962 |
].
|
|
|
963 |
r := r + 1
|
|
|
964 |
].
|
|
|
965 |
|
|
46
|
966 |
"again with less color bits if we did not get all colors"
|
|
1
|
967 |
|
|
|
968 |
fit ifFalse:[
|
|
46
|
969 |
'D24IMAGE: still no fit' errorPrintNL.
|
|
1
|
970 |
|
|
|
971 |
"free the allocated colors"
|
|
|
972 |
colors atAllPut:nil.
|
|
|
973 |
"a kludge - force immediate freeing of colors"
|
|
|
974 |
ObjectMemory scavenge.
|
|
|
975 |
|
|
|
976 |
"cut off one more color-bit - cut off blue first"
|
|
|
977 |
(bMask == 2r11111111) ifTrue:[
|
|
|
978 |
bMask := 2r11111110
|
|
|
979 |
] ifFalse:[
|
|
|
980 |
(bMask == 2r11111110) ifTrue:[
|
|
|
981 |
bMask := 2r11111100
|
|
|
982 |
] ifFalse:[
|
|
|
983 |
rMask := (rMask bitShift:1) bitAnd:2r11111111.
|
|
|
984 |
gMask := (gMask bitShift:1) bitAnd:2r11111111.
|
|
|
985 |
bMask := (bMask bitShift:1) bitAnd:2r11111111
|
|
|
986 |
]
|
|
|
987 |
].
|
|
|
988 |
fitMap := false.
|
|
|
989 |
redArray := nil
|
|
|
990 |
]
|
|
|
991 |
].
|
|
|
992 |
|
|
|
993 |
"create pseudocolor bits and translate"
|
|
|
994 |
|
|
|
995 |
pseudoBits := ByteArray uninitializedNew:(width * height).
|
|
|
996 |
|
|
|
997 |
srcIndex := 1.
|
|
|
998 |
dstIndex := 1.
|
|
|
999 |
|
|
|
1000 |
[srcIndex < dataSize] whileTrue:[
|
|
|
1001 |
r := bytes at:srcIndex.
|
|
|
1002 |
r := r bitAnd:rMask.
|
|
|
1003 |
srcIndex := srcIndex + 1.
|
|
|
1004 |
g := bytes at:srcIndex.
|
|
|
1005 |
g := g bitAnd:gMask.
|
|
|
1006 |
srcIndex := srcIndex + 1.
|
|
|
1007 |
b := bytes at:srcIndex.
|
|
|
1008 |
b := b bitAnd:bMask.
|
|
|
1009 |
srcIndex := srcIndex + 1.
|
|
|
1010 |
greenArray := redArray at:(r + 1).
|
|
|
1011 |
blueArray := greenArray at:(g + 1).
|
|
|
1012 |
pseudoBits at:dstIndex put:(blueArray at:(b + 1)).
|
|
|
1013 |
dstIndex := dstIndex + 1
|
|
|
1014 |
].
|
|
|
1015 |
|
|
46
|
1016 |
f := Form width:width height:height depth:aDevice depth on:aDevice.
|
|
1
|
1017 |
f isNil ifTrue:[^ nil].
|
|
|
1018 |
f colorMap:colors.
|
|
|
1019 |
f initGC.
|
|
46
|
1020 |
aDevice drawBits:pseudoBits bitsPerPixel:8 depth:aDevice depth
|
|
|
1021 |
width:width height:height
|
|
|
1022 |
x:0 y:0
|
|
|
1023 |
into:(f id) x:0 y:0 width:width height:height with:(f gcId).
|
|
1
|
1024 |
^ f
|
|
|
1025 |
! !
|
|
|
1026 |
|
|
|
1027 |
!Depth24Image methodsFor:'magnification'!
|
|
|
1028 |
|
|
|
1029 |
magnifyRowFrom:srcBytes offset:srcStart
|
|
|
1030 |
into:dstBytes offset:dstStart factor:mX
|
|
|
1031 |
|
|
|
1032 |
"magnify a single pixel row - can only magnify by integer factors"
|
|
|
1033 |
|
|
|
1034 |
%{
|
|
|
1035 |
unsigned char *srcP, *dstP;
|
|
|
1036 |
int _mag;
|
|
|
1037 |
REGISTER int i;
|
|
|
1038 |
REGISTER unsigned char byte1, byte2, byte3;
|
|
|
1039 |
int _pixels;
|
|
|
1040 |
|
|
|
1041 |
if (_isSmallInteger(srcStart) && _isSmallInteger(dstStart)
|
|
|
1042 |
&& _isSmallInteger(_INST(width)) && _isSmallInteger(mX)
|
|
35
|
1043 |
&& __isByteArray(srcBytes) && __isByteArray(dstBytes)) {
|
|
1
|
1044 |
_mag = _intVal(mX);
|
|
|
1045 |
srcP = _ByteArrayInstPtr(srcBytes)->ba_element - 1 + _intVal(srcStart);
|
|
|
1046 |
dstP = _ByteArrayInstPtr(dstBytes)->ba_element - 1 + _intVal(dstStart);
|
|
|
1047 |
_pixels = _intVal(_INST(width));
|
|
|
1048 |
|
|
|
1049 |
while (_pixels--) {
|
|
|
1050 |
byte1 = *srcP;
|
|
|
1051 |
byte2 = *(srcP+1);
|
|
|
1052 |
byte3 = *(srcP+2);
|
|
|
1053 |
srcP += 3;
|
|
|
1054 |
for (i=_mag; i>0; i--) {
|
|
|
1055 |
*dstP = byte1;
|
|
|
1056 |
*(dstP+1) = byte2;
|
|
|
1057 |
*(dstP+2) = byte3;
|
|
|
1058 |
dstP += 3;
|
|
|
1059 |
}
|
|
|
1060 |
}
|
|
|
1061 |
RETURN (self);
|
|
|
1062 |
}
|
|
|
1063 |
%}
|
|
|
1064 |
.
|
|
|
1065 |
self primitiveFailed
|
|
|
1066 |
!
|
|
|
1067 |
|
|
|
1068 |
hardMagnifyBy:extent
|
|
|
1069 |
"return a new image magnified by extent, aPoint.
|
|
|
1070 |
This is the general magnification method, handling non-integral values"
|
|
|
1071 |
|
|
|
1072 |
|mX mY
|
|
|
1073 |
newWidth "{ Class: SmallInteger }"
|
|
|
1074 |
newHeight "{ Class: SmallInteger }"
|
|
|
1075 |
w "{ Class: SmallInteger }"
|
|
|
1076 |
h "{ Class: SmallInteger }"
|
|
|
1077 |
newImage newBytes
|
|
|
1078 |
value "{ Class: SmallInteger }"
|
|
|
1079 |
srcRowIdx "{ Class: SmallInteger }"
|
|
|
1080 |
srcIndex "{ Class: SmallInteger }"
|
|
|
1081 |
dstIndex "{ Class: SmallInteger }"|
|
|
|
1082 |
|
|
|
1083 |
mX := extent x.
|
|
|
1084 |
mY := extent y.
|
|
|
1085 |
((mX < 0) or:[mY < 0]) ifTrue:[^ nil].
|
|
|
1086 |
((mX = 1) and:[mY = 1]) ifTrue:[^ self].
|
|
|
1087 |
|
|
|
1088 |
newWidth := (width * mX) truncated.
|
|
|
1089 |
newHeight := (height * mY) truncated.
|
|
|
1090 |
newBytes := ByteArray uninitializedNew:(newWidth * 3 * newHeight).
|
|
|
1091 |
|
|
|
1092 |
newImage := self species new.
|
|
|
1093 |
newImage bits:newBytes.
|
|
|
1094 |
newImage width:newWidth.
|
|
|
1095 |
newImage height:newHeight.
|
|
|
1096 |
newImage photometric:photometric.
|
|
|
1097 |
newImage samplesPerPixel:samplesPerPixel.
|
|
|
1098 |
newImage bitsPerSample:#(8 8 8).
|
|
|
1099 |
|
|
|
1100 |
"walk over destination image fetching pixels from source image"
|
|
|
1101 |
|
|
|
1102 |
mY := mY asFloat.
|
|
|
1103 |
mX := mX asFloat.
|
|
|
1104 |
%{
|
|
|
1105 |
REGISTER unsigned char *_dstP = _ByteArrayInstPtr(newBytes)->ba_element;
|
|
|
1106 |
unsigned char *_srcP = _ByteArrayInstPtr(_INST(bytes))->ba_element;
|
|
|
1107 |
unsigned char *_srcRowP, *sP;
|
|
|
1108 |
int _width3 = _intVal(_INST(width)) * 3;
|
|
|
1109 |
int _w = _intVal(newWidth) - 1;
|
|
|
1110 |
int _h = _intVal(newHeight) - 1;
|
|
|
1111 |
int _row, _col;
|
|
|
1112 |
double _mX = _floatVal(mX);
|
|
|
1113 |
double _mY = _floatVal(mY);
|
|
|
1114 |
|
|
|
1115 |
for (_row = 0; _row <= _h; _row++) {
|
|
|
1116 |
_srcRowP = _srcP + (_width3 * (int)((double)_row / _mY));
|
|
|
1117 |
for (_col = 0; _col <= _w; _col++) {
|
|
|
1118 |
sP = _srcRowP + (((int)((double)_col / _mX)) * 3);
|
|
|
1119 |
_dstP[0] = sP[0];
|
|
|
1120 |
_dstP[1] = sP[1];
|
|
|
1121 |
_dstP[2] = sP[2];
|
|
38
|
1122 |
_dstP += 3;
|
|
1
|
1123 |
}
|
|
|
1124 |
}
|
|
|
1125 |
%}
|
|
|
1126 |
.
|
|
|
1127 |
"
|
|
|
1128 |
dstIndex := 1.
|
|
|
1129 |
w := newWidth - 1.
|
|
|
1130 |
h := newHeight - 1.
|
|
|
1131 |
0 to:h do:[:row |
|
|
|
1132 |
srcRowIdx := (width * 3 * (row // mY)) + 1.
|
|
|
1133 |
0 to:w do:[:col |
|
|
|
1134 |
srcIndex := srcRowIdx + ((col // mX) * 3).
|
|
|
1135 |
value := bytes at:srcIndex.
|
|
|
1136 |
newBytes at:dstIndex put:value.
|
|
|
1137 |
value := bytes at:(srcIndex + 1).
|
|
|
1138 |
newBytes at:(dstIndex + 1) put:value.
|
|
|
1139 |
value := bytes at:(srcIndex + 2).
|
|
|
1140 |
newBytes at:(dstIndex + 2) put:value.
|
|
|
1141 |
dstIndex := dstIndex + 3
|
|
|
1142 |
]
|
|
|
1143 |
].
|
|
|
1144 |
"
|
|
|
1145 |
^ newImage
|
|
|
1146 |
! !
|