[ok] Find RGB color from Hue
Posted: Wed Jul 01, 2015 1:12 pm
Hi
For my application, I need to use a color selector. I can pick the color from an image/sprite, and I would like to update the color selector with the good color (not the RGB color, but the RGB from the hue color ^^).
I have found thousand of code conversion, but I haven't foudn a simple solution for my problem.
Here is the code :
[Edit : ok, I have found ^^]
Code modified :
Thanks 
For my application, I need to use a color selector. I can pick the color from an image/sprite, and I would like to update the color selector with the good color (not the RGB color, but the RGB from the hue color ^^).
I have found thousand of code conversion, but I haven't foudn a simple solution for my problem.
Here is the code :
[Edit : ok, I have found ^^]
Code modified :
Code: Select all
Enumeration ; gadget
#G_ColorSelector
#G_ColorArcEnCielSelect
#btn_Color
EndEnumeration
Enumeration ; image
#IMAGE_ColorSelector
EndEnumeration
Structure sHsv
h.f
s.f
v.f
EndStructure
Structure Colour
R.f
G.f
B.f
EndStructure
Global HSV.sHsv
Procedure.f Max3(Value1.f=0, Value2.f=0, Value3.f=0)
Protected MaxValue.f = 0
If Value1 > MaxValue : MaxValue = Value1 : EndIf
If Value2 > MaxValue : MaxValue = Value2 : EndIf
If Value3 > MaxValue : MaxValue = Value3 : EndIf
ProcedureReturn MaxValue
EndProcedure
Procedure.f Min3(Value1.f=255, Value2.f=255, Value3.f=255)
Protected MinValue.f = 255
If Value1 < MinValue : MinValue = Value1 : EndIf
If Value2 < MinValue : MinValue = Value2 : EndIf
If Value3 < MinValue : MinValue = Value3 : EndIf
ProcedureReturn MinValue
EndProcedure
Procedure RgbToHSV(r,g,b)
R1.f = R
R1/255
G1.f = G
G1/255
B1.f = B
B1/255
Cmax.f = max3(R1, G1, B1)
Cmin.f = min3(R1, G1, B1)
delta.f = Cmax - Cmin
; Value calculation:
HSV\v = Cmax
; Saturation
If Cmax <> 0
HSV\s = delta
HSV\s/ Cmax ; // s
Else
HSV\s = 0;
HSV\h = -1;
ProcedureReturn
EndIf
; HUE
If Delta = 0 ;//This is a gray, no chroma...
HSV\H = 0 ;//HSV results from 0 To 1
HSV\S = 0
Else ;//Chromatic Data...
HSV\S = Delta / Cmax
del_R.f = ( ( ( Cmax - R1 ) / 6 ) + ( Delta / 2 ) ) / Delta
del_G.f = ( ( ( Cmax - G1 ) / 6 ) + ( Delta / 2 ) ) / Delta
del_B.f = ( ( ( Cmax - B1 ) / 6 ) + ( Delta / 2 ) ) / Delta
If R1 = Cmax
HSV\H = del_B - del_G
ElseIf G1 = Cmax
HSV\H = ( 1 / 3 ) + del_R - del_B
ElseIf B1 = Cmax
HSV\H = ( 2 / 3 ) + del_G - del_R
EndIf
If HSV\H < 0
HSV\H + 1
EndIf
If HSV\H > 1
HSV\H - 1
EndIf
EndIf
HSV\h * 360 ; // degrees
If HSV\h < 0
HSV\h + 360
EndIf
EndProcedure
Procedure.f MinF(n1.f, n2.f)
If n1<n2
ProcedureReturn n1
EndIf
ProcedureReturn n2
EndProcedure
Procedure.f MaxF(n1.f, n2.f)
If n1>n2
ProcedureReturn n1
EndIf
ProcedureReturn n2
EndProcedure
Procedure.i HSV2RGB(H.f,S.f,V.f)
Define.COLOUR sat
While h < 0
h = h + 360
Wend
While h > 360
h = h - 360
Wend
If h < 120
sat\r = (120 - h) / 60.0
sat\g = h / 60.0
sat\b = 0
ElseIf h < 240
sat\r = 0
sat\g = (240 - h) / 60.0
sat\b = (h - 120) / 60.0
Else
sat\r = (h - 240) / 60.0
sat\g = 0
sat\b = (360 - h) / 60.0
EndIf
sat\r = MinF(sat\r, 1)
sat\g = MinF(sat\g, 1)
sat\b = MinF(sat\b, 1)
r = ((1 - s + s * sat\r) * v )*255
g = ((1 - s + s * sat\g) * v )*255
b = ((1 - s + s * sat\b) * v )*255
Debug "RGB (d'après la teinte) : " + Str(R)+"/"+Str(G)+"/"+Str(B)
ProcedureReturn RGB(r,g,b)
EndProcedure
Procedure SetColorSelector(color,x=0,y=0,mode=0)
Shared cursorX,cursorY
R = Red(color)
G = Green(color)
B = Blue(color)
RGBtoHSV(r,g,b)
; ça, c'est ok
Debug StrF(HSV\H,3)+"/"+StrF(HSV\V,3) + "/"+StrF(HSV\S,3)
H = HSV2RGB(HSV\H,1,1)
R = Red(h)
G = Green(h)
B = Blue(h)
If mode = 0
cursorX = 256 * HSV\s
cursorY = 256-256 * HSV\v
; Debug "pos : "+Str(cursorX)+"/"+Str(cursorY)
EndIf
If StartDrawing(ImageOutput(#IMAGE_ColorSelector))
Box(0,0,256,256,RGBA(255,255,255,255))
DrawingMode(#PB_2DDrawing_AlphaBlend)
For i = 0 To 255
For j = 0 To 255
Plot(i, j, RGBA($FF, $FF, $FF, i))
Plot(i, j, RGBA(0, 0, 0, j))
Next
Next
For i = 0 To 255
For j = 0 To 255
Plot(i, j, RGBA(R, G, B, i))
Plot(i, j, RGBA(0, 0, 0, j))
Next
Next
StopDrawing()
EndIf
If StartDrawing(CanvasOutput(#G_ColorSelector))
Box(0,0,256,256,RGB(255,255,255))
DrawingMode(#PB_2DDrawing_AlphaBlend)
DrawImage(ImageID(#IMAGE_ColorSelector),0,0,GadgetWidth(#G_ColorSelector),GadgetHeight(#G_ColorSelector))
If mode =1
DrawingMode(#PB_2DDrawing_Outlined)
Circle(x,y,8,#White)
Circle(x,y,9,#Black)
cursorX = x
cursorY = y
Else
DrawingMode(#PB_2DDrawing_Outlined)
Circle(cursorX,cursorY,8,#White)
Circle(cursorX,cursorY,9,#Black)
EndIf
StopDrawing()
EndIf
EndProcedure
OpenWindow(0, 0, 0, 600,400, "", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
CreateImage(#IMAGE_ColorSelector,256,256)
CanvasGadget(#G_ColorSelector,10,10,256,256)
SetColorSelector(RGB(255,0,0))
ButtonGadget(#btn_Color, 300,10,100,50,"Change color")
Repeat
event = WaitWindowEvent(1)
Select event
Case #PB_Event_Gadget
Select EventGadget()
Case #btn_Color
Color = ColorRequester(color)
SetColorSelector(color)
Case #G_ColorSelector
Select EventType()
Case #PB_EventType_LeftButtonUp
get = 0
Case #PB_EventType_MouseMove
If get = 1
cursorX = WindowMouseX(0)- 8
cursorY = WindowMouseY(0)- 8
SetColorSelector (color,cursorX ,cursorY,1)
EndIf
Case #PB_EventType_LeftButtonDown
GEt = 1
cursorX = WindowMouseX(0)- 8
cursorY = WindowMouseY(0)- 8
SetColorSelector (color,cursorX ,cursorY,1)
EndSelect
EndSelect
EndSelect
Until Event = #PB_Event_CloseWindow