Simple SpriteSheet Editor step by step in QB64pe

[TempodiBasic]

Hi
this is a first version of a SpriteSheet editor: a program that loads a SpriteSheet and let you modify it painting with simple tools or/and lets to select an area as a single sprite into the sheet. After selected the sprites, you can save their cohordinates into a DATA file to use into your code with the original  SpriteSheet and you can see the selected sprite shown on the screen.








It is a project step by step:
this first step brings a program with a main window that will be adapted to the spritesheet loaded and on this the user can define the 2 points to select an area of the picture to do a single sprite. You can accept/store or cancel each point selected before, after stored point 1 and 2 you get the sprite that is highlighted by a red square. 
You can stop the selecting function pressing spacebar into the main loop or mousebutton2 while you are selecting the point 2.

the selected sprites will be displayed at the end of the procedure of selection.





This program uses a second area /canvas to give output to the user as messages or warnings or instructions.
I have posted some screenshots.

It is really incomplete but it can grow up if I use Option _explicit avoiding to waste so much time with bugs going out from my typo errors!

Code: (Select All)

Option _Explicit

Rem SPRITE SHEET EDITOR
Rem this software has the purpouse to load an image of a sprite sheet
Rem and in SELECT MODE it allows to the user to select an area,
Rem or in EDIT MODE to paint changing the images into the sprite sheet

_Title "SpriteSheet Editor"
Const W = 1200, H = 800

'global varables
Dim Shared Main&, Sprite&, NameFile$, SSheet&, HelpS&
ReDim Sprites&(1 To 1)
Dim Shared As Integer Xm(1 To 2), Ym(1 To 2), SprC(1 To 4, 1 To 100)
' main variables
Dim Mg As Integer, a As Integer, Mb1 As Integer, Mb2 As Integer, kb As Integer, spr As Integer

Main& = _NewImage(W, H, 32)
HelpS& = _NewImage(W, H / 4, 32)

Screen Main&
_PrintString ((W / 2) - (10 * 8), H / 2), "SPRITES SHEET EDITOR" ' the title is 20 characters
_Delay 3
_SetAlpha 125, HelpS& ' area of output is half transparent
LoadI
Mg = 13: a = 0 'Mg pixel between 2 lines of the reticulus, a is a counter

While kb <> 32 ' while user does not press spacebar, he can define area on the screen delimiting sprites to capture into single area/canvas
    Helping " Press spacebar to end", 1
    If MouseData(Mb1, Mb2) = -1 Then 'it evaluates mouseinput
        If Mb1 Then 'did mouse button 1 trigger?
            ' it starts the procedure for storing X an Y of points 1 (topleft) and 2 (bottomright)
            If StoreMouseData(1) = -1 Then ' it stores mouse data  for topleft point of sprite
                While 1
                    Helping " Press spacebar to end", 1
                    Helping Str$(_MouseX) + Str$(_MouseY) + Space$(8), 0
                    '_Dest HelpS&: Locate 4, 26: Print kb; Space$(10);
                    'Locate 5, 1: Print _MouseX, _MouseY; Space$(8);: _Dest 0
                    '_PutImage (0, 2 * (_Height(0))), HelpS&,

                    If MouseData(Mb1, Mb2) = -1 Then ' it evaluates mouse input
                        Helping " Press spacebar to end", 1
                        Helping Str$(_MouseX) + Str$(_MouseY) + Space$(8), 0
                        ' it adjourns the keyboard and mouse information
                        '_Dest HelpS&: Locate 4, 26: Print kb; Space$(10);
                        'Locate 5, 1: Print _MouseX, _MouseY; Space$(8);: _Dest 0
                        '_PutImage (0, 2 * (_Height(0))), HelpS&,

                        If Mb1 Then 'did  mousebutton 1 trigger?
                            If StoreMouseData(2) = -1 Then ' yes, it stores  mouse data bottomright
                                ' after confirming the two points of the sprite it memorizes their cohordinates into SprC array
                                spr = spr + 1 ' sprite counter
                                SprC(1, spr) = Xm(1): Xm(1) = 0 'X1
                                SprC(2, spr) = Ym(1): Ym(1) = 0 'Y1
                                SprC(3, spr) = Xm(2): Xm(2) = 0 'X2
                                SprC(4, spr) = Ym(2): Ym(2) = 0 'Y2
                                Line (SprC(1, spr), SprC(2, spr))-(SprC(3, spr), SprC(4, spr)), _RGB32(233, 0, 6), B
                                Helping Str$(spr) + "/" + Str$(SprC(1, spr)) + "+" + Str$(SprC(2, spr)) + "--" + Str$(SprC(3, spr)) + "+" + Str$(SprC(4, spr)), 0
                                _Delay 1
                                Exit While ' after storing point 2 of sprite it returns to external loop
                            Else
                                Helping "To exit press mouse button 2", 0
                                _Delay 2
                            End If
                        End If
                        If Mb2 = -1 Then Exit While
                    End If
                Wend
            End If
            ' if no data stored for point 1 topleft it runs again the loop
        End If
    End If

    kb = _KeyHit
    ' escaping way
    If kb = 13 Then Grid
    Helping Str$(kb), 0
    Helping Str$(_MouseX) + Str$(_MouseY), 0
    While _MouseInput: Wend ' it voids the mouse buffer
    _Limit 10
Wend
Screen Main&
Helping "Save data of sprites into a DATA code file (Y/N)?", 1
kb = 0
While kb = 0
    kb = _KeyHit
    If kb = 89 Or kb = 121 Then SaveDATAtoFile: Exit While 'Y or y
    If kb = 78 Or kb = 110 Then Exit While ' N or n
    kb = 0
Wend
' getting single sprites with newimage
ReDim Sprites&(1 To spr), x As Integer, y As Integer
For a = 1 To spr
    Sprites&(a) = _NewImage(Abs(SprC(1, a) - SprC(3, a)), Abs(SprC(2, a) - SprC(4, a)), 32)
    _PutImage , Sprite&, Sprites&(a), (SprC(1, a), SprC(2, a))-(SprC(3, a), SprC(4, a)) 'it copies area of spritesheet to single area/canvas
    x = x + _Width(Sprites&(a)) ' it adjourns the cohordinates X for showing sprites in sequence
    y = _Height(Sprites&(a))
    _PutImage (x, y), Sprites&(a), 0 ' showing sprites from 1 to top
Next a

End

Sub SaveDATAtoFile
    Rem Saveto DATA file
    Rem save to file in DATA format the array SprC
    Dim n As Integer
    Open "Datafile.txt" For Output As #1
    Helping "Saving data...", 0
    Print #1, "Data";
    For n = 1 To 100 Step 1
        If SprC(1, n) = 0 Then _Continue ' if it finds a wrong value it exits from FOR loop
        If (n Mod 9) = 0 Then Print #1,: Print #1, "Data"; Else If n > 1 Then Print #1, ",";
        Print #1, SprC(1, n), ",", SprC(2, n), ",", SprC(3, n), ",", SprC(4, n);
    Next
    Close #1
    Helping "Saved data!", 1
End Sub

Function MouseData (Mb1 As Integer, Mb2 As Integer)
    MouseData = 0
    While _MouseInput: Wend ' it waits that mouse input ends
    Mb1 = _MouseButton(1)
    Mb2 = _MouseButton(2)
    If Mb1 <> 0 Or Mb2 <> 0 Then MouseData = -1 ' if no mousebutton then function returns failure
End Function

Function StoreMouseData (Index As Integer)
    Dim kb As Integer, OldC As Long
    StoreMouseData = 0
    If _MouseX > 0 Then Xm(Index) = _MouseX Else Xm(Index) = 1 ' it corrects wrong 0 values
    If _MouseY > 0 Then Ym(Index) = _MouseY Else Ym(Index) = 1


    If Xm(Index) > 0 And Ym(Index) > 0 Then
        ' both cohordinates are good?
        Helping "Storing point " + Str$(Index) + Str$(Xm(Index)) + "-" + Str$(Ym(Index)) + " Cancel/Store?", 0
        OldC = Point(Xm(Index), Ym(Index))
        PSet (Xm(Index), Ym(Index)), _RGB32(211, 255, 6)

        While 1 'kb <> 83 Or kb <> 115
            ' here the loop to take cancel/store data
            kb = _KeyHit

            If kb = 67 Or kb = 99 Then
                PSet (Xm(Index), Ym(Index)), OldC
                Exit Function ' if key is c or C then exit function returning the  failure
            End If
            If kb = 83 Or kb = 115 Then Exit While
        Wend
        Helping "Stored", 0
        _Delay 1
        StoreMouseData = -1
    Else
        Exit Function
    End If
End Function

Sub Grid
    Shared Mg As Integer, a As Integer
    For a = 1 To W Step Mg
        Line (a, 1)-(a, W), Mg
    Next
    For a = 1 To H Step Mg
        Line (1, a)-(H, a), Mg
    Next
End Sub

Sub LoadI
    NameFile$ = ".\defendersprites.jpg" '<----- coming soon Open option to type name of file and better an Opendialog box
    If _FileExists(NameFile$) Then
        Helping "File founded", 1
        Sprite& = _LoadImage(NameFile$)
    Else
        Helping "Error: image not loaded", 1
        Sprite& = -1000 ' sprite& brings the failure flag
        _Delay 2
        Exit Sub
    End If
    _Delay 1
    SSheet& = _NewImage(_Width(Sprite&), _Height(Sprite&), 32)
    Screen SSheet&
    _PutImage , Sprite&, 0
End Sub

Sub PaletteS
    Dim n As Integer
    For n = 1 To 256
        'pset (n,1),n
        Line (n, 1)-(n, 256), n, BF
    Next n
    Sleep 2
End Sub

Sub Helping (Msg As String, M As Integer)
    _Dest HelpS&
    If M = 1 Then Cls
    Print Msg
    _Dest 0
    _PutImage (0, 2 * (_Height(0) / 3)), HelpS&,
End Sub

Welcome feedbacks and propositive criticisms.

I'm thinking to add a third way to select the area with a dragging of mouse like in the graphic editor in which you draw a square/rectangle.
Moreover I need an OpenDialog box to choose the file of the Spritesheet to modify. I think that the created/selected sprites must be managed like in a list box with a single/multiple selection for doing specific actions (Save, Cancel, Edit...).
I have never used a SpriteSheet Editor but I'm doing it from zero with poor plan... this will cause so much modifications! Sob. Better measures twice and cut ones.

this is the spritesheet that I have used as file, but use whatever do you want