How to use Python to generate a bitmap with layer?
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On 14/05/2015 at 15:10, xxxxxxxx wrote:
Hi,
I try to write an plugin that split a image into a image with layer.
Each color (material id's) get it own layer.
The layer are convert to use for alphamaps in c4d material.I can initialize a bitmap from a file.
But it is BaseBitmap.I try to use MultipassBitmap.
Now I can create a new empty layer.But I cant set Pixel at the empty layer.
How can I set pixel to a layer?
import c4d import os from c4d import bitmaps, gui, storage def main() : doc = c4d.documents.GetActiveDocument() op = doc.GetActiveObject() path = storage.LoadDialog(type=c4d.FILESELECTTYPE_IMAGES, title="Please Choose the PolyPaint Image") if not path: return # Create and initialize selected image orig = bitmaps.BaseBitmap() if orig.InitWith(path)[0] != c4d.IMAGERESULT_OK: gui.MessageDialog("Cannot load image \"" + path + "\".") return # Get selected image infos width, height = orig.GetSize() bits = orig.GetBt() # Create the copy and initialize it copy = bitmaps.BaseBitmap() copy.Init(width, height, bits) multibmp = bitmaps.MultipassBitmap.AllocWrapper(copy) layer_a = multibmp.AddLayer(multibmp.GetLayers(c4d.MPB_GETLAYERS_0),1) # ColorPalette Variable vorbereiten ColPal = [0,0] cc = 0 # Zähler auf 0 while cc < 512: # ColorPalette 512 Einträge mit 0 füllen ColPal.append(0) cc = cc + 1 wy = 0 while wy < height: # Bildzeilen durchlaufen wx = 0 while wx < width: # Bildpunkte der Zeile durchlaufen readcol = orig.GetPixel(wx,wy) # Pixel als Farb-Vector auslesen farbanzahl = 6 # In wie viele Farben aufteilen? farbdivid = 256 * 3 / farbanzahl # Bit + Anzahl Farbkanäle geteilt durch die Farbanzahl = Divisor # Farbkanäle runter rechnen r=int(readcol[0]/farbdivid) g=int(readcol[1]/farbdivid) b=int(readcol[2]/farbdivid) # reduzierte Farben in neue Bitmap eintragen copy.SetPixel(wx,wy,r*farbdivid,g*farbdivid,b*farbdivid) multibmp.SetPixel(wx,wy,r*farbdivid,g*farbdivid,b*farbdivid) layer_a.SetPixel(wx,wy,r*farbdivid,g*farbdivid,b*farbdivid) ColPal[r*g*b] = [r,g,b] # ColorPalette (512 mögliche Farben) mit Wert füllen wx = wx +1 # Zeile +1 wy = wy + 1 # Spalte +1 bitmaps.ShowBitmap(orig) # Show original bitmaps.ShowBitmap(copy) # Show copied image bitmaps.ShowBitmap(multibmp) # Show copied image # Einträge auswerten und anzeigen ccc = 0 for element in ColPal: if element > [0,0,0]: print element ccc = ccc + 1 print ccc print layer_a print multibmp if __name__=='__main__': main()This is my code for loading an image.
Reduce the colors and write to a new bitmap.
And I create a multipass bitmap for test to create a layer.Maybe, later I want to use OpenCV or PIL library for better convert the image.
Bernd
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On 18/05/2015 at 02:51, xxxxxxxx wrote:
Hello,
it seems that a MultipassBitmap layer can only be accessed through GetPixelCnt() / SetPixelCnt(), you you have to setup a ByteSeq:
mp = c4d.bitmaps.MultipassBitmap(200,200,c4d.COLORMODE_RGB) newlayer = mp.AddLayer(None,c4d.COLORMODE_RGB) newlayer.SetParameter(c4d.MPBTYPE_NAME,"the new layer") sq = c4d.storage.ByteSeq(None, 3) for x in xrange(200) : for y in xrange(200) : # set the pixel to 255/128/0 sq[0] = chr(255) sq[1] = chr(128) sq[2] = chr(0) newlayer.SetPixelCnt(x,y,1,sq.GetOffset(0),3,c4d.COLORMODE_RGB,c4d.PIXELCNT_0) saveImagePath = c4d.storage.SaveDialog(c4d.FILESELECTTYPE_IMAGES,"Save as TIFF") mp.Save(saveImagePath,c4d.FILTER_TIF,None,c4d.SAVEBIT_MULTILAYER)best wishes,
Sebastian
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On 29/05/2015 at 07:43, xxxxxxxx wrote:
Hello Bernd,
was your question answered?
Best wishes,
Sebastian
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On 04/06/2015 at 10:55, xxxxxxxx wrote:
Hi Sebastian :-)
thank you after I try to develope the app I make a pause.
I have read you answer - very best thanks!!!I will try it later ;-)
Today I try another start to develope python script.Maybe some days later I will answer the code can help, or not.
Thank you again, I don't forgot to post it later ;-)
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On 10/06/2015 at 16:52, xxxxxxxx wrote:
Looks good, but there is a problem:
if I save as tif it will be very good!!!
I open in Photoshop and there are the layers i can create now :-)But when I open the mp (bitmap) in the picture viewer it only show one layer!
mp = c4d.bitmaps.MultipassBitmap(200,200,c4d.COLORMODE_RGB|c4d.COLORMODE_ALPHA) newlayer = mp.AddLayer(None,c4d.COLORMODE_RGB) newlayer.SetParameter(c4d.MPBTYPE_NAME,"the new layer") sq = c4d.storage.ByteSeq(None, 3) for x in xrange(200) : for y in xrange(200) : #set the pixel to 255/128/0 sq[0] = chr(255) sq[1] = chr(128) sq[2] = chr(0) # write pixel newlayer.SetPixelCnt(x,y,1,sq.GetOffset(0),3,c4d.COLORMODE_RGB,c4d.PIXELCNT_0) # a second layer newlayerA = mp.AddLayer(None,c4d.COLORMODE_ALPHA) newlayerA.SetParameter(c4d.MPBTYPE_NAME,"the new layer2") sqA = c4d.storage.ByteSeq(None, 3) for x in xrange(200) : for y in xrange(200) : #set the pixel to 255/128/0 sqA[0] = chr(255) sqA[1] = chr(128) sqA[2] = chr(255) newlayerA.SetPixelCnt(x,y,1,sqA.GetOffset(0),3,c4d.COLORMODE_ALPHA,c4d.PIXELCNT_0) saveImagePath = c4d.storage.SaveDialog(c4d.FILESELECTTYPE_IMAGES,"Save as TIFF") mp.Save(saveImagePath,c4d.FILTER_TIF,None,c4d.SAVEBIT_MULTILAYER) bitmaps.ShowBitmap(mp)
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On 10/06/2015 at 17:05, xxxxxxxx wrote:
Photoshop:
Picture Viewer in C4D:
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On 11/06/2015 at 01:05, xxxxxxxx wrote:
Hello,
a layer only appears in the Picture Viewer if the MPBTYPE_SHOW parameter is set to true. See also this thread: "Bake texture and MultipassBitMap".
Best wishes,
Sebastian
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On 11/06/2015 at 03:29, xxxxxxxx wrote:
Thank you very much