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58230: Draw Frame Corners
Used by the routine at DrawFrame.
Draws the pictures for the corners of a frame at the left and the right of one of its edges.
Input
A The vertical position
IX The entry of the frame
DrawFrameCorners 58230 LD H,A Copy the y position into H.
58231 LD A,(IX+0) Fetch the x position of the frame.
58234 SUB 8 Subtract 8 to put the corner beside the left end of the bar.
58236 LD L,A Copy it into L.
58237 CALL DrawPicture Draw the left corner.
58240 LD A,(IX+2) Fetch the width of the frame.
58243 INC A Add one.
58244 ADD A,A Double it.
58245 ADD A,A Double it again.
58246 ADD A,A Double it a third time, to find the width in pixels.
58247 ADD A,L Add the x position of the left corner.
58248 LD L,A Copy it into L.
58249 JP DrawPicture Jump to DrawPicture.
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