| Commit message (Collapse) | Author | Age |
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The vector line drawing operation of the screen device uses optimised
methods when drawing horizontal and vertical lines. The emulator now
interprets the coordinates of these lines as signed values, to allow for
the correct rendering of orthogonal lines where the coordinates of the
left or top edges are off-screen. Diagonal lines are yet to be tackled.
The bounding-box calculations shared by the rectangle and orthogonal
line drawing methods have also been split off into their own method,
significantly reducing the code duplication between all four of the
methods which require this functionality.
This commit also makes aesthetic changes to the code in the
draw_diagonal_line method to improve readability and brevity, as a part
of the changes made to the draw_line method when the points parameter
was removed from each of the three lower line-drawing methods.
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This method was exceeding the 80-character line limit, which was
interfering with the centering behaviour of my text editor.
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The method was between the two draw_sprite methods, but it fits better
just after draw_pixel.
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The vector+size draw operations of the screen device draw textured and
untextured rectangles. The emulator now interprets the coordinates of
a rectangle as signed values, to allow for the correct rendering of
rectangles where the coordinates of the left or top edges are off-screen.
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The vector+size+sprite draw operation of the screen device has been
changed in the specification from drawing a 1-bit textured triangle to
drawing a 1-bit textured line. This draw operation had not yet been
implemented, so this commit does not affect emulator functionality.
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