[squeak-dev] The Trunk: Graphics-tfel.310.mcz
commits at source.squeak.org
commits at source.squeak.org
Fri Apr 17 12:37:58 UTC 2015
Tim Felgentreff uploaded a new version of Graphics to project The Trunk:
http://source.squeak.org/trunk/Graphics-tfel.310.mcz
==================== Summary ====================
Name: Graphics-tfel.310
Author: tfel
Time: 17 April 2015, 2:37:38.42 pm
UUID: dcfe87bc-46ca-c04e-b99b-5a711f8a8c9e
Ancestors: Graphics-tk.309
add convolution to forms and some common kernels for blurring, sharpening and so on
=============== Diff against Graphics-tk.309 ===============
Item was added:
+ ----- Method: Form>>approxGaussianBlur (in category 'processing') -----
+ approxGaussianBlur
+
+ ^ self processUsingKernel: (Matrix rows: 3 columns: 3 contents: #(
+ 1 2 1
+ 2 4 2
+ 1 2 1
+ ) * 0.0625)!
Item was added:
+ ----- Method: Form>>edgeDetect (in category 'processing') -----
+ edgeDetect
+
+ ^ self processUsingKernel: (Matrix rows: 3 columns: 3 contents: #(
+ -1 -1 -1
+ -1 8 -1
+ -1 -1 -1
+ ))!
Item was added:
+ ----- Method: Form>>emboss (in category 'processing') -----
+ emboss
+
+ ^ self processUsingKernel: (Matrix rows: 3 columns: 3 contents: #(
+ -2 -1 0
+ -1 1 1
+ 0 1 2
+ ))!
Item was added:
+ ----- Method: Form>>processUsingKernel: (in category 'processing') -----
+ processUsingKernel: filter
+
+ ^ self processUsingKernel: filter factor: 1.0 bias: 0.0!
Item was added:
+ ----- Method: Form>>processUsingKernel:factor:bias: (in category 'processing') -----
+ processUsingKernel: filter factor: factor bias: bias
+ | image result |
+
+ image := self.
+ result := Form extent: image extent depth: image depth.
+
+ 0 to: image height - 1 do: [:y |
+ 0 to: image width - 1 do: [:x |
+ | r g b |
+ r := g := b := 0.0.
+
+ 0 to: filter rowCount - 1 do: [:filterY |
+ 0 to: filter columnCount - 1 do: [:filterX |
+ | imageX imageY |
+ imageX := (x - (filter columnCount // 2) + filterX + image width) \\
+ image width.
+ imageY := (y - (filter rowCount // 2) + filterY + image height) \\
+ image height.
+ r := r + ((image colorAt: imageX at imageY) red *
+ (filter at: filterY + 1 at: filterX + 1)).
+ g := g + ((image colorAt: imageX at imageY) green *
+ (filter at: filterY + 1 at: filterX + 1)).
+ b := b + ((image colorAt: imageX at imageY) blue *
+ (filter at: filterY + 1 at: filterX + 1))]].
+
+ result colorAt: x at y put: (Color
+ r: ((factor * r + bias) min: 1.0 max: 0.0)
+ g: ((factor * g + bias) min: 1.0 max: 0.0)
+ b: ((factor * b + bias) min: 1.0 max: 0.0))]].
+ ^ result
+ !
Item was added:
+ ----- Method: Form>>sharpen (in category 'processing') -----
+ sharpen
+
+ ^ self processUsingKernel: (Matrix rows: 3 columns: 3 contents: #(
+ 0 -1 0
+ -1 5 -1
+ 0 -1 0
+ ))!
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