canvas.monkey2 addition for frame based images

[AdamStrangeParticipant]

here’s a dirty addition to mojo/graphics/canvas to allow horizontally packed images:

#rem monkeydoc Draws an image icon frame.
Draws an image using the current [[Color]], [[BlendMode]] and [[Matrix]].

@param tx X coordinate to draw image at.

@param ty Y coordinate to draw image at.

@param iconNumber number from 0 of the icon frame to draw (frames start from 0 and go left to right in equal pixel amounts).

@param iconCount how many icon frames are packed into the image

@param sx X axis scale factor for drawing.

@param sy Y axis scale factor for drawing.
#end
Method DrawImageIcon( image:Image, tx:Float, ty:Float, iconNumber:Int, iconCount:Int )
If iconCount < 0 Then Return

Local vs:=image.Vertices
Local wd:Float = (vs.max.x – vs.min.x) / iconCount
vs.max.x = vs.min.x + wd

Local tc:=image.TexCoords
wd = (tc.max.x – tc.min.x) / iconCount
tc.min.x = tc.min.x + (iconNumber * wd)
tc.max.x = tc.min.x + wd

AddDrawOp( image.Material,4,1 )
AddVertex( vs.min.x+tx, vs.min.y+ty, tc.min.x, tc.min.y )
AddVertex( vs.max.x+tx, vs.min.y+ty, tc.max.x, tc.min.y )
AddVertex( vs.max.x+tx, vs.max.y+ty, tc.max.x, tc.max.y )
AddVertex( vs.min.x+tx, vs.max.y+ty, tc.min.x, tc.max.y )
End

Method DrawImageIcon( image:Image, tx:Float, ty:Float, iconNumber:Int, iconCount:Int, sx:Float, sy:float )
Local matrix := _matrix
Translate( tx, ty )
Rotate( 0 )
Scale( sx, sy )
DrawImageIcon( image, 0,0, iconNumber, iconCount )
_matrix = matrix
End

There are two bits one for drawing and another for doing the same but with scaling.

Should be self explanatory. hopefully won’t do any damage. tested here, but not fully!

Quick shot of it inspiration with the tree view. Only using one image (from the debug_icons) as a test

Attachments:

1. 

   Screen-Shot-2016-07-11-at-15.27.12.png
   

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