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ColorMatrix filter

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ColorMatrix filter

Posted: Tue Aug 06, 2013 7:31 am
by wilbert
A color matrix filter (requires SSE2).
The 4 x 5 matrix works the same as the matrix from the ColorMatrixFilter class from the Adobe Flash Player.

ColorMatrix.pbi

Code: Select all

; *** Color Matrix Filter ***

; Min CPU requirement : SSE2 (Pentium 4 or Athlon 64)

Structure CM_Matrix
  m.f[20]
EndStructure

Structure CM_Filter
  mem.b[96]
EndStructure

Procedure CM_GetIdentityMatrix(*Matrix.CM_Matrix)
  ; Get an identity matrix
  Protected.i row, col
  For row = 0 To 3
    For col = 0 To 4
      If row = col
        *Matrix\m[row * 5 + col] = 1
      Else
        *Matrix\m[row * 5 + col] = 0
      EndIf
    Next
  Next
EndProcedure

Procedure CM_GetMatrix(*Filter.CM_Filter, *Matrix.CM_Matrix)
  ; Get the matrix of a filter
  Protected.i row, col, *M.CM_Matrix = (*Filter + 15) & -16
  If *Filter\mem[95]
    For row = 0 To 3
      For col = 0 To 4
        *Matrix\m[row * 5 + col] = *M\m[col * 4 + row]
      Next
    Next
  Else
    CM_GetIdentityMatrix(*Matrix)
  EndIf
EndProcedure

Procedure CM_SetMatrix(*Filter.CM_Filter, *Matrix.CM_Matrix = 0)
  ; Set the matrix of a filter
  Protected.i row, col, *M.CM_Matrix = (*Filter + 15) & -16
  For row = 0 To 3
    For col = 0 To 4
      If *Matrix
        *M\m[col * 4 + row] = *Matrix\m[row * 5 + col]
      Else
        If row = col
          *M\m[col * 4 + row] = 1
        Else
          *M\m[col * 4 + row] = 0
        EndIf
      EndIf
    Next
  Next
  *Filter\mem[95] = 1; maxtrix is set flag
EndProcedure

Procedure CM_ConcatMatrix(*Filter.CM_Filter, *Matrix.CM_Matrix)
  ; Concatenates the matrix
  Protected.i i, row, col, current.CM_Matrix, new.CM_MAtrix
  CM_GetMatrix(*Filter, @current)
  For row = 0 To 3
    For col = 0 To 4
      new\m[i + col] = *Matrix\m[i] * current\m[col] +
                       *Matrix\m[i + 1] * current\m[col + 5] +
                       *Matrix\m[i + 2] * current\m[col + 10] +
                       *Matrix\m[i + 3] * current\m[col + 15]
      If col = 4 : new\m[i + 4] + *Matrix\m[i + 4] : EndIf
    Next
    i + 5  
  Next
  CM_SetMatrix(*Filter, @new)
EndProcedure

Procedure CM_ApplyToBuffer(*PixelBuf32, *Filter.CM_Filter, NumPixels, ByteOrder = 0)
  ; Byte order 0 : RGBA
  ; Byte order 1 : BGRA
  CompilerIf #PB_Compiler_Processor = #PB_Processor_x64
    CompilerIf #PB_Compiler_OS = #PB_OS_Windows
      ; xmm6 and xmm7 need to be preserved on Windows x64
      Dim xmm_storage.q(3)
      !mov rax, [p.a_xmm_storage]
      !movdqu [rax], xmm6
      !movdqu [rax + 16], xmm7
    CompilerEndIf
    !mov rdx, [p.p_Filter]
    !add rdx, 15
    !and rdx, -16
    !movaps xmm0, [rdx]
    !movaps xmm1, [rdx + 16]
    !movaps xmm2, [rdx + 32]
    !movaps xmm3, [rdx + 48]
    !movaps xmm4, [rdx + 64]
    !mov rdx, [p.p_PixelBuf32]
  CompilerElse
    !mov edx, [p.p_Filter]
    !add edx, 15
    !and edx, -16
    !movaps xmm0, [edx]
    !movaps xmm1, [edx + 16]
    !movaps xmm2, [edx + 32]
    !movaps xmm3, [edx + 48]
    !movaps xmm4, [edx + 64]
    !mov edx, [p.p_PixelBuf32]
  CompilerEndIf
  !mov ecx, [p.v_ByteOrder]
  !shr ecx, 1
  !mov ecx, [p.v_NumPixels]
  !jnc cm_apply_loop
  !pshufd xmm0, xmm0, 11000110b
  !pshufd xmm1, xmm1, 11000110b
  !pshufd xmm2, xmm2, 11000110b
  !pshufd xmm3, xmm3, 11000110b
  !pshufd xmm4, xmm4, 11000110b
  !cm_apply_loop:
  CompilerIf #PB_Compiler_Processor = #PB_Processor_x64
    !movd xmm5, [rdx]
  CompilerElse
    !movd xmm5, [edx]
  CompilerEndIf
  !pxor xmm6, xmm6
  !punpcklbw xmm5, xmm6
  !punpcklwd xmm5, xmm6
  !cvtdq2ps xmm5, xmm5
  !pshufd xmm6, xmm5, 00000000b
  !mulps xmm6, xmm0
  !addps xmm6, xmm4
  !pshufd xmm7, xmm5, 01010101b
  !mulps xmm7, xmm1
  !addps xmm6, xmm7
  !pshufd xmm7, xmm5, 10101010b
  !mulps xmm7, xmm2
  !addps xmm6, xmm7
  !pshufd xmm7, xmm5, 11111111b
  !mulps xmm7, xmm3
  !addps xmm6, xmm7
  !cvtps2dq xmm5, xmm6
  !packssdw xmm5, xmm5
  !packuswb xmm5, xmm5
  CompilerIf #PB_Compiler_Processor = #PB_Processor_x64
    !movd [rdx], xmm5
    !add rdx, 4
  CompilerElse
    !movd [edx], xmm5
    !add edx, 4
  CompilerEndIf
  !dec ecx
  !jnz cm_apply_loop
  CompilerIf #PB_Compiler_Processor = #PB_Processor_x64 And #PB_Compiler_OS = #PB_OS_Windows
    !movdqu xmm6, [rax]
    !movdqu xmm7, [rax + 16]
  CompilerEndIf
EndProcedure

Procedure CM_ApplyToImage(Image, *Filter.CM_Filter)
  
  Protected.i w, x, y, max_x, max_y
  Protected.i addr, pitch, byte_order
  
  If StartDrawing(ImageOutput(Image))
    w = OutputWidth()
    max_y = OutputHeight() - 1
    
    If DrawingBufferPixelFormat() & $60; 32 bit buffer ?
      addr = DrawingBuffer()
      pitch = DrawingBufferPitch()
      byte_order = DrawingBufferPixelFormat() >> 6 & 1
      For y = 0 To max_y
        CM_ApplyToBuffer(addr, *Filter, w, byte_order)
        addr + pitch
      Next
    Else
      max_x = w - 1
      Dim Buffer.l(max_x)
      DrawingMode(#PB_2DDrawing_AllChannels)
      For y = 0 To max_y
        For x = 0 To max_x
          Buffer(x) = Point(x, y)
        Next
        CM_ApplyToBuffer(@Buffer(), *Filter, w)
        For x = 0 To max_x
          Plot(x, y, Buffer(x))
        Next
      Next
    EndIf
    StopDrawing()
    
  EndIf
  
EndProcedure

Procedure.l CM_Apply(Color.l, *Filter.CM_Filter)
  ; Apply the filter to a color
  !pxor xmm1, xmm1
  !movd xmm0, [p.v_Color]
  !punpcklbw xmm0, xmm1
  !punpcklwd xmm0, xmm1
  !cvtdq2ps xmm0, xmm0
  !pshufd xmm1, xmm0, 01010101b
  !pshufd xmm2, xmm0, 10101010b
  !pshufd xmm3, xmm0, 11111111b
  !pshufd xmm0, xmm0, 00000000b
  CompilerIf #PB_Compiler_Processor = #PB_Processor_x64
    !mov rdx, [p.p_Filter]
    !add rdx, 15
    !and rdx, -16
    !mulps xmm0, [rdx]
    !mulps xmm1, [rdx + 16]
    !mulps xmm2, [rdx + 32]
    !mulps xmm3, [rdx + 48]
    !addps xmm0, [rdx + 64]
  CompilerElse
    !mov edx, [p.p_Filter]
    !add edx, 15
    !and edx, -16
    !mulps xmm0, [edx]
    !mulps xmm1, [edx + 16]
    !mulps xmm2, [edx + 32]
    !mulps xmm3, [edx + 48]
    !addps xmm0, [edx + 64]
  CompilerEndIf
  !addps xmm0, xmm1
  !addps xmm0, xmm2
  !addps xmm0, xmm3
  !cvtps2dq xmm0, xmm0
  !packssdw xmm0, xmm0
  !packuswb xmm0, xmm0
  !movd eax, xmm0
  ProcedureReturn
EndProcedure

Procedure CM_AdjustContrast(*Filter.CM_Filter, value.f)
  ; Adjust contrast (-100 - 100)
  Protected.f s, o, m.CM_Matrix
  If value
    s = value / 100 + 1
    o = 128 * (1 - s)
    CM_GetIdentityMatrix(@m)
    m\m[0] = s : m\m[4] = o
    m\m[6] = s : m\m[9] = o
    m\m[12] = s : m\m[14] = o
    CM_ConcatMatrix(*Filter, @m)
  EndIf
EndProcedure

Procedure CM_AdjustBrightness(*Filter.CM_Filter, value.f)
  ; Adjust brightness (-255 - 255)
  Protected m.CM_Matrix
  If value
    CM_GetIdentityMatrix(@m)
    m\m[4] = value
    m\m[9] = value
    m\m[14] = value
    CM_ConcatMatrix(*Filter, @m)
  EndIf
EndProcedure

Procedure CM_AdjustSaturation(*Filter.CM_Filter, value.f)
  ; Adjust saturation (-100 - 100)
  Protected.f v, r, g, b, m.CM_Matrix
  If value
    v = -value / 100
    r = 0.299 * v
    g = 0.587 * v
    b = 0.114 * v
    v = 1 - v
    CM_GetIdentityMatrix(@m)
    m\m[0] = r + v : m\m[1] = g : m\m[2] = b
    m\m[5] = r : m\m[6] = g + v : m\m[7] = b
    m\m[10] = r : m\m[11] = g : m\m[12] = b + v
    CM_ConcatMatrix(*Filter, @m)
  EndIf
EndProcedure
	
DataSection
  ; Some filter matrices
  grayscale:
  Data.f 0.299,0.587,0.114,0,0
  Data.f 0.299,0.587,0.114,0,0
  Data.f 0.299,0.587,0.114,0,0
  Data.f 0,0,0,1,0
  sepia:
  Data.f 0.393,0.769,0.189,0,0
  Data.f 0.349,0.686,0.168,0,0
  Data.f 0.272,0.534,0.131,0,0
  Data.f 0,0,0,1,0
  invert:
  Data.f -1,0,0,0,255
  Data.f 0,-1,0,0,255
  Data.f 0,0,-1,0,255
  Data.f 0,0,0,1,0
  black_and_white:
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 0,0,0,1,0
EndDataSection
Example

Code: Select all

EnableExplicit

XIncludeFile "ColorMatrix.pbi"

Define.i w, h, sepia.CM_Filter

CM_SetMatrix(@sepia, ?sepia); Setup a sepia filter
CM_AdjustContrast(@sepia, -50); Decrease the contrast
CM_AdjustBrightness(@sepia, -20); Make it a bit darker 

UseJPEGImageDecoder()
LoadImage(0, "MyImage.jpg")

w = ImageWidth(0)
h = ImageHeight(0)

CM_ApplyToImage(0, @sepia)

If OpenWindow(0, 0, 0, w, h, "ColorMatrix Filter", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
  ImageGadget(0, 0, 0, w, h, ImageID(0))
  Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 8:11 am
by davido
@Wilbert,

Very nice - impressive. Thank you for sharing. :D

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 9:50 am
by Little John
Very nice indeed. :-)
Thanks for sharing!

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 11:00 am
by STARGÅTE
CM_Apply() is a powerfull function, thx for sharing.
You can combine this function with the CustomFilterCallback() instead of the For-Loop with Plot and Point

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 11:16 am
by wilbert
STARGÅTE wrote:CM_Apply() is a powerfull function, thx for sharing.
You can combine this function with the CustomFilterCallback() instead of the For-Loop with Plot and Point
Thanks for the feedback :)

I thought CustomFilterCallback() only worked for lines and boxes etc.
After some experimenting, I got it to work. It's a lot faster :D

Code: Select all

Global sepia.CM_Filter
CM_SetMatrix(@sepia, ?sepia); Setup a sepia filter
CM_AdjustContrast(@sepia, -50); Decrease the contrast
CM_AdjustBrightness(@sepia, -20); Make it a bit darker 

Procedure FilterCallback(x, y, SourceColor, TargetColor)
  ProcedureReturn CM_Apply(TargetColor, @sepia)
EndProcedure

UseJPEGImageDecoder()
LoadImage(0, "MyImage.jpg")

StartDrawing(ImageOutput(0))

w = OutputWidth()
h = OutputHeight()

DrawingMode(#PB_2DDrawing_CustomFilter)
CustomFilterCallback(@FilterCallback())
Box(0, 0, w, h)

StopDrawing()

If OpenWindow(0, 0, 0, w, h, "ColorMatrix Filter", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
  ImageGadget(0, 0, 0, w, h, ImageID(0))
  Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 12:05 pm
by STARGÅTE
It works with all drawing functions (DrawImage, DrawText, ...)
(And it works also with gradient functions)

Hier a example:

Code: Select all

; *** Color Matrix Filter ***

; Min CPU requirement : SSE2 (Pentium 4 or Athlon 64)

Structure CM_Matrix
  m.f[20]
EndStructure

Structure CM_Filter
  mem.b[96]
EndStructure

Procedure CM_GetMatrix(*Filter.CM_Filter, *Matrix.CM_Matrix)
  ; Get the matrix of a filter
  Protected row, col, *M.CM_Matrix = (*Filter + 15) & -16
  For row = 0 To 3
    For col = 0 To 4
      *Matrix\m[row * 5 + col] = *M\m[col * 4 + row]
    Next
  Next
EndProcedure

Procedure CM_GetIdentityMatrix(*Matrix.CM_Matrix)
  ; Get an identity matrix
  Protected row, col
  For row = 0 To 3
    For col = 0 To 4
      *Matrix\m[row * 5 + col] = Bool(row = col)
    Next
  Next
EndProcedure

Procedure CM_SetMatrix(*Filter.CM_Filter, *Matrix.CM_Matrix = 0)
  ; Set the matrix of a filter
  Protected row, col, *M.CM_Matrix = (*Filter + 15) & -16
  For row = 0 To 3
    For col = 0 To 4
      If *Matrix
        *M\m[col * 4 + row] = *Matrix\m[row * 5 + col]
      Else
        *M\m[col * 4 + row] = Bool(row = col)
      EndIf
    Next
  Next
EndProcedure

Procedure CM_ConcatMatrix(*Filter.CM_Filter, *Matrix.CM_Matrix)
  ; Concatenates the matrix
  Protected i, row, col, current.CM_Matrix, new.CM_MAtrix
  CM_GetMatrix(*Filter, @current)
  For row = 0 To 3
    For col = 0 To 4
      new\m[i + col] = *Matrix\m[i] * current\m[col] +
                       *Matrix\m[i + 1] * current\m[col + 5] +
                       *Matrix\m[i + 2] * current\m[col + 10] +
                       *Matrix\m[i + 3] * current\m[col + 15]
      If col = 4 : new\m[i + 4] + *Matrix\m[i + 4] : EndIf
    Next
    i + 5
  Next
  CM_SetMatrix(*Filter, @new)
EndProcedure

Procedure.l CM_Apply(Color.l, *Filter.CM_Filter)
  ; Apply the filter to a color
  !pxor xmm1, xmm1
  !movd xmm0, [p.v_Color]
  !punpcklbw xmm0, xmm1
  !punpcklwd xmm0, xmm1
  !cvtdq2ps xmm0, xmm0
  !pshufd xmm1, xmm0, 01010101b
  !pshufd xmm2, xmm0, 10101010b
  !pshufd xmm3, xmm0, 11111111b
  !pshufd xmm0, xmm0, 00000000b
  CompilerIf #PB_Compiler_Processor = #PB_Processor_x64
    !mov rdx, [p.p_Filter]
    !add rdx, 15
    !and rdx, -16
    !mulps xmm0, [rdx]
    !mulps xmm1, [rdx + 16]
    !mulps xmm2, [rdx + 32]
    !mulps xmm3, [rdx + 48]
    !addps xmm0, [rdx + 64]
  CompilerElse
    !mov edx, [p.p_Filter]
    !add edx, 15
    !and edx, -16
    !mulps xmm0, [edx]
    !mulps xmm1, [edx + 16]
    !mulps xmm2, [edx + 32]
    !mulps xmm3, [edx + 48]
    !addps xmm0, [edx + 64]
  CompilerEndIf
  !addps xmm0, xmm1
  !addps xmm0, xmm2
  !addps xmm0, xmm3
  !cvtps2dq xmm0, xmm0
  !packssdw xmm0, xmm0
  !packuswb xmm0, xmm0
  !movd eax, xmm0
  ProcedureReturn
EndProcedure

Procedure CM_AdjustBrightness(*Filter.CM_Filter, value.f)
  ; Adjust the brightness of a filter (-255 - 255)
  Protected m.CM_Matrix
  If value
    CM_GetIdentityMatrix(@m)
    m\m[4] = value
    m\m[9] = value
    m\m[14] = value
    CM_ConcatMatrix(*Filter, @m)
  EndIf
EndProcedure

Procedure CM_AdjustContrast(*Filter.CM_Filter, value.f)
  ; Adjust the contrast of a filter (-100 - 100)
  Protected m.CM_Matrix, s.f, o.f
  If value
    s = value / 100 + 1
    o = 128 * (1 - s)
    CM_GetIdentityMatrix(@m)
    m\m[0] = s : m\m[4] = o
    m\m[6] = s : m\m[9] = o
    m\m[12] = s : m\m[14] = o
    CM_ConcatMatrix(*Filter, @m)
  EndIf
EndProcedure

DataSection
  ; Some filter matrices
  grayscale:
  Data.f 0.33,0.59,0.11,0,0
  Data.f 0.33,0.59,0.11,0,0
  Data.f 0.33,0.59,0.11,0,0
  Data.f 0,0,0,1.0,0
  sepia:
  Data.f 0.393,0.769,0.189,0,0
  Data.f 0.349,0.686,0.168,0,0
  Data.f 0.272,0.534,0.131,0,0
  Data.f 0,0,0,1,0
  invert:
  Data.f -1,0,0,0,255
  Data.f 0,-1,0,0,255
  Data.f 0,0,-1,0,255
  Data.f 0,0,0,1,0
  black_and_white:
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 0,0,0,1,0
EndDataSection



OpenWindow(0, 0, 0, 500, 500, "", #PB_Window_ScreenCentered|#PB_Window_SystemMenu)
CanvasGadget(0, 0, 0, 500, 500)

Procedure CustomCallback(X, Y, SourceColor, TargetColor)
   Shared *CurrentFilter
   ProcedureReturn AlphaBlend(CM_Apply(SourceColor, *CurrentFilter), TargetColor) ; Alpha blend for alpha suppoert
EndProcedure


Procedure DrawingFilter(*Filter.CM_Filter)
   Shared *CurrentFilter
   *CurrentFilter = *Filter
   DrawingMode(#PB_2DDrawing_CustomFilter)
   CustomFilterCallback(@CustomCallback())
EndProcedure   


sepia.CM_Filter
CM_SetMatrix(@sepia, ?sepia); Setup a sepia filter
invert.CM_Filter
CM_SetMatrix(invert, ?invert); Setup a invert filter

UsePNGImageDecoder()
CatchImage(0, ?Image)
StartDrawing(CanvasOutput(0))
   DrawAlphaImage(ImageID(0), 0, 0)
   DrawingFilter(@sepia)
   DrawImage(ImageID(0), 50, 0)
   DrawImage(ImageID(0), 50, 150, 64, 256)
   DrawingFilter(@invert)
   DrawImage(ImageID(0), 100, 0)
StopDrawing()

Repeat
Until WaitWindowEvent() = #PB_Event_CloseWindow


DataSection
   Image:
   Data.q $0A1A0A0D474E5089,$524448490D000000,$8000000020000000,$6B666A0000000608,$475273010000001A
   Data.q $0000E91CCEAE0042,$DA78544144490020,$EF99555D98699BED,$A9539AC67DEF6B7F,$0612194648CA6A4A
   Data.q $8D283994063CC399,$32A222A2F415B7D2,$9C57DABC55A55F68,$2655CB602BD016D0,$4C21242991080301
   Data.q $3CD4AA92A4810819,$7EEB5EF3D9F33A9E,$DDBC51229392BB38,$CE7679FBD0FE9F7D,$7AEF5FFBD67D9DA9
   Data.q $4E25DFBFC12EF5E7,$4948973A68C72AFE,$472C11F02A271A1D,$4031106BA0040281,$7F8CB306F9AC8C68
   Data.q $0A5AB85B94ED4103,$31D1231132B0502E,$9EAC69B34D1D1663,$34743E04398CC74E,$4D0516893AAAA1CD
   Data.q $56ECFFAF966E5817,$DFCB19439DEBDC36,$6E747CE55F15CB36,$CB3170BA1DA715F2,$D634A58EE2C51E17
   Data.q $52F66321EC513336,$9BEB833FCE19C7B4,$4364A02543EA5BBC,$F3CA3D21BAFA124D,$680141FF80725E99
   Data.q $CCBFC1A427C2BE2B,$2C09C4709F8D68EF,$66DC81932814785B,$084EEEC0CFDD4BDE,$3015C0A001504940
   Data.q $A69ADA351BD30130,$3C430A107C6292E1,$271001AFF7016406,$37987F157A799E7C,$82C39C572B61E66B
   Data.q $C0DAF23667F445F6,$1902ADA8148DF41D,$096CE132A940AE80,$3FCE2AACF660C7BA,$17BB1930D67228FE
   Data.q $39E51E778394A0A1,$CABFACE2FE3006C0,$CFB392F9FE09A297,$3CFD3BB347A5D8E6,$7E8996EB8FDD77CF
   Data.q $E691FEF53642F1A8,$82EEB61F7C0A9046,$D9217D9F5724DABA,$48AE65B5E95D3B60,$FF7009403BF2F430
   Data.q $A3343C2DC57D0012,$5412ECB87F92FAA9,$BDB6C67F81FACF24,$327CABC736437B32,$96C0E38949351A13
   Data.q $B6D69B384F47C14E,$FCAA7BE10F723B38,$70FC77B106FF2CAE,$F46DCA72200C0E91,$6795AACB5674BE1E
   Data.q $8C9D13A31D6267B2,$964ACD996353408E,$64E8BC3E1EC5733F,$DAE7A82F197A6CD6,$327796B23E4E3F73
   Data.q $14009390484994EF,$214F3614C88C1204,$A4B61F3F85B8AC6E,$D19DE72F67A3E5AD,$992C2522742D1947
   Data.q $40164215A3632271,$ABF1C0CC4313B8AA,$8C7B54607FC2FEB9,$F9456070B41DE761,$35D50065C4CB251F
   Data.q $4A8FC9311CD5E470,$D6D9FF997F27E80E,$4CE94BD9C1715896,$C3FCA0A858E5873D,$F58D1A13F20686FA
   Data.q $7657920A274B2F72,$E32D817D178DC33F,$12035108D361B1F7,$811221C589C1B2C9,$78B3F292E67964AA
   Data.q $005EDE012F00273D,$174DCD5629A2CE0B,$897B0DE93D28739E,$B33752990FA400AB,$6D4344DA9E31969A
   Data.q $3F13AAC177DB5679,$9CBBCD4714F060C9,$5236F4B4662F17B3,$A55200A81DCDC62A,$01A2EFBE08F6F26E
   Data.q $7E4E121C23D06AC9,$74BCDC61C67D002F,$F69669883EBE0371,$597A974EEC865CCE,$FA89B1BD4F097ED8
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   Data.q $3A30AE0C28706B8C,$444E454900000000,$00000000826042AE
EndDataSection
edit: AlphaBlend in custom filter callback
edit2: DrawImage with an other scale.
edit3: bug fix

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 12:25 pm
by wilbert
STARGÅTE wrote:It works with all drawing functions (DrawImage, DrawText, ...)
(And it works also with gradient functions)

Hier a example:
A very nice example Stargate 8) :D

On Windows your example works fine, on OS X it doesn't.
There seems to be a bug that prevents a custom filter callback to work when drawing an image on OS X.

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 10:09 pm
by BasicallyPure
Is there something wrong here with grayscale?
Black & white works but with grayscale I get nothing.

Code: Select all

;no longer relevant so code deleted
BP

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 10:50 pm
by STARGÅTE
my mistake, i miss the 1 in the alpha-cannel in the grayscale filter:

Code: Select all

DataSection
  ; Some filter matrices
  grayscale:
  Data.f 0.33,0.59,0.11,0,0
  Data.f 0.33,0.59,0.11,0,0
  Data.f 0.33,0.59,0.11,0,0
  Data.f 0,0,0,1.0,0 ;<<< HERE 
  sepia:
  Data.f 0.393,0.769,0.189,0,0
  Data.f 0.349,0.686,0.168,0,0
  Data.f 0.272,0.534,0.131,0,0
  Data.f 0,0,0,1,0
  invert:
  Data.f -1,0,0,0,255
  Data.f 0,-1,0,0,255
  Data.f 0,0,-1,0,255
  Data.f 0,0,0,1,0
  black_and_white:
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 1.5,1.5,1.5,0,-255
  Data.f 0,0,0,1,0
EndDataSection

Re: ColorMatrix filter

Posted: Tue Aug 06, 2013 11:08 pm
by BasicallyPure
Thanks Stargate.

BP.

Re: ColorMatrix filter

Posted: Wed Aug 07, 2013 7:18 am
by wilbert
I updated my first post to a separate include file and an example.
I also added saturation adjustment. It makes it possible to create contrast, brightness and saturation sliders and create a filter based on that.

Simple example (without sliders)

Code: Select all

EnableExplicit

XIncludeFile "ColorMatrix.pbi"

Define.i w, h, max_x, max_y, x, y, ColorCorrection.CM_Filter

CM_SetMatrix(@ColorCorrection); Reset the filter matrix
CM_AdjustContrast(@ColorCorrection, -50)
CM_AdjustBrightness(@ColorCorrection, 80)
CM_AdjustSaturation(@ColorCorrection, -70)

UseJPEGImageDecoder()
LoadImage(0, "MyImage.jpg")

StartDrawing(ImageOutput(0))

w = OutputWidth()
h = OutputHeight()
max_x = w - 1
max_y = h - 1

For y = 0 To max_y
  For x = 0 To max_x
    Plot(x, y, CM_Apply(Point(x, y), @ColorCorrection))
  Next
Next

StopDrawing()

If OpenWindow(0, 0, 0, w, h, "ColorMatrix Filter", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
  ImageGadget(0, 0, 0, w, h, ImageID(0))
  Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf

Re: ColorMatrix filter

Posted: Thu Aug 08, 2013 11:45 pm
by BasicallyPure
I've been working on a program that uses Wilbert's ColorMatrix.pbi include file.
I don't know how to make the adjustments work properly using a slider for brightness, contrast, and saturation.
Here is the code I have so far.

edit: 8/8/2013
code updated.
I'm getting there, I just need to sleep for a while.
It mostly works, you just have to select revert before doing an adjustment.

edit: 8/9/2013
code updated.
now brightness, contrast, and saturation are working properly.
My next task is to add 'save as' to the menu options.

edit: 8/9/2013
code simplified and removed unused variables.

BP.

Code: Select all

;- demo for Wilbert's ColorMatrix Filter
;
; by BasicallyPure
; 8/9/2013

IncludeFile "ColorMatrix.pbi"
; forum topic: http://www.purebasic.fr/english/viewtopic.php?f=12&t=55804

EnableExplicit

Enumeration ; popup menu items
   #load
   #revert
   #grayscale
   #sepia
   #invert
   #BlackAndWhite
   #brightness
   #contrast
   #saturation
   #Quit
EndEnumeration

#imgMain = 0
#imgAdjust = 1

Procedure Apply_Filter(menuChoice.i, adjVal.i = 0)
   Static Filter.CM_Filter
   
   Select menuChoice
      Case #grayscale     : CM_SetMatrix(@Filter, ?grayscale)
      Case #sepia         : CM_SetMatrix(@Filter, ?sepia)
      Case #invert        : CM_SetMatrix(@Filter, ?invert)
      Case #BlackAndWhite : CM_SetMatrix(@Filter, ?black_and_white)
      Case #brightness    : CM_SetMatrix(@Filter) : CM_AdjustBrightness(@Filter, adjVal)
      Case #contrast      : CM_SetMatrix(@Filter) : CM_AdjustContrast(@Filter, adjVal)
      Case #saturation    : CM_SetMatrix(@Filter) : CM_AdjustSaturation(@Filter, adjVal)
      Default : ProcedureReturn 0
   EndSelect
   
   CM_ApplyToImage(#imgMain, @Filter)
   SetGadgetState(0, ImageID(#imgMain))
   ProcedureReturn 1
EndProcedure

Procedure.s Load_Image()
   Protected path.s
   path = OpenFileRequester("select source image", GetHomeDirectory() + "\My Pictures\",
          "*.jpg,*.png,*.bmp|*.jpg;*.png;*.bmp",0)
   If path = "" ; error
   ElseIf LoadImage(#imgMain, path) = 0 : path = ""
   EndIf
   
   If path = ""
      MessageRequester("Error!", "No image was loaded.")
   EndIf
   
   ProcedureReturn path
EndProcedure

Procedure Adjust(menuChoice.i)
   Protected flags.i, title.s, min.i, max.i
   
   Select menuChoice
      Case #brightness : title = "brightness = " : min = -255 : max = 255
      Case #contrast   : title = "contrast = "   : min = -100 : max = 100
      Case #saturation : title = "saturation = " : min = -100 : max = 100
      Default : ProcedureReturn 0
   EndSelect
   
   flags = #PB_Window_WindowCentered | #PB_Window_SystemMenu
   OpenWindow(1, 0, 0, 400, 30, title+"0", flags, WindowID(0))
   TrackBarGadget(1, 5, 5, 390, 30, 0, max-min)
   SetGadgetState(1, (max-min)/2)
   
   CopyImage(#imgMain, #imgAdjust)
   Repeat
      Select WaitWindowEvent()
         Case #PB_Event_CloseWindow : CloseWindow(1) : Break
         Case #PB_Event_Gadget : SetWindowTitle(1, title + Str(GetGadgetState(1)+min))
         Case #WM_LBUTTONUP
            If GetActiveGadget() = 1
               CopyImage(#imgAdjust, #imgMain)
               Apply_Filter(menuChoice, GetGadgetState(1)+min)
            EndIf
      EndSelect
   ForEver
   
EndProcedure

Define.i w = 640, h = 480, menuChoice
Define.s path

UseJPEGImageDecoder()
UsePNGImageDecoder()
CreateImage(#imgMain, w, h)

If OpenWindow(0, 0, 0, w, h, "ColorMatrix Filter Demo | right click for menu")
   CreatePopupMenu(0)
      MenuItem(#load, "load image")
      MenuItem(#revert, "revert")
   MenuBar()
      MenuItem(#grayscale, "grayscale")
      MenuItem(#sepia, "sepia")
      MenuItem(#invert, "invert")
      MenuItem(#BlackAndWhite, "black and white")
   MenuBar()
      OpenSubMenu("adjust")
         MenuItem(#brightness, "brightness")
         MenuItem(#contrast, "contrast")
         MenuItem(#saturation, "saturation")
      CloseSubMenu()
   MenuBar()
      MenuItem(#Quit, "Quit")
   
   ImageGadget(0, 0, 0, w, h, ImageID(#imgMain))
   
   Repeat ; event loop
      Select WaitWindowEvent()
         Case #PB_Event_CloseWindow
            If EventWindow() = 1
               CloseWindow(1)
            Else
               Break
            EndIf
         Case #PB_Event_Gadget
            If EventType() = #PB_EventType_RightClick
               DisplayPopupMenu(0, WindowID(0))
            EndIf
         Case #PB_Event_Menu : menuChoice = EventMenu()
            Select menuChoice
               Case #load ; load new image
                  path = Load_Image()
                  If path
                     w = ImageWidth(#imgMain) : h = ImageHeight(#imgMain)
                     ResizeWindow(0, 0, 0, w, h)
                     SetGadgetState(0, ImageID(#imgMain))
                  EndIf
               Case #revert
                  If path
                     LoadImage(#imgMain, path)
                     SetGadgetState(0, ImageID(#imgMain))
                  EndIf
               Case #grayscale  To #BlackAndWhite : Apply_Filter(menuChoice)
               Case #brightness To #saturation    : Adjust(menuChoice)
               Case #Quit : Break
            EndSelect
            
      EndSelect
   ForEver
EndIf

Re: ColorMatrix filter

Posted: Fri Aug 09, 2013 7:28 am
by davido
Another nice piece of work.
Thank you for sharing. :D

Is there a reason why you reload the file on revert, rather than copy an already loaded image?

Re: ColorMatrix filter

Posted: Fri Aug 09, 2013 8:08 am
by BasicallyPure
Hi Davido,
davido wrote:Is there a reason why you reload the file on revert, rather than copy an already loaded image?
No 'good' reason for that.
I still consider this a work in progress and it wasn't at the top of my priority list.
What I really want is a way to change brightness, contrast, and saturation without applying one of the other filter effects as well.
I'm hoping that Wilbert can help with that.

BP.

Re: ColorMatrix filter

Posted: Fri Aug 09, 2013 8:46 am
by wilbert
I updated my first post.
The include file contains a procedure now CM_ApplyToImage to apply a filter directly to an image.
I added an extra asm routine for that also. With the new procedure, if the image is already in 32 bit format, it works directly on the drawing buffer.
In this case the processing time is about 1/3 of what it was before.

As for the brightness, contrast, and saturation without applying one of the other filter effects, you can do it like this.

Code: Select all

Define Sepia.CM_Filter, ColorCorrection.CM_Filter, CC_Matrix.CM_Matrix

CM_SetMatrix(@ColorCorrection); Reset the filter matrix
CM_AdjustContrast(@ColorCorrection, -50)
CM_AdjustBrightness(@ColorCorrection, 80)
CM_AdjustSaturation(@ColorCorrection, -70)

; use the ColorCorrection filter after this

; to combine with another filter

CM_SetMatrix(@sepia, ?sepia); Setup a sepia filter
CM_GetMatrix(@ColorCorrection, @CC_Matrix)
CM_ConcatMatrix(@sepia, @CC_Matrix); Combine with the color correction matrix
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