48 lines
937 B
C++
48 lines
937 B
C++
#pragma once
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#include "stdafx.h"
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#include "DrawCommand.h"
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class DrawLineCommand : public DrawCommand
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{
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private:
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int _x, _y, _x2, _y2, _color;
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protected:
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void InternalDraw()
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{
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int x = _x;
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int y = _y;
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int dx = abs(_x2 - x), sx = x < _x2 ? 1 : -1;
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int dy = abs(_y2 - y), sy = y < _y2 ? 1 : -1;
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int err = (dx > dy ? dx : -dy) / 2, e2;
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while (true)
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{
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DrawPixel(x, y, _color);
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if (x == _x2 && y == _y2)
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{
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break;
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}
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e2 = err;
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if (e2 > -dx)
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{
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err -= dy;
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x += sx;
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}
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if (e2 < dy)
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{
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err += dx;
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y += sy;
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}
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}
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}
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public:
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DrawLineCommand(int x, int y, int x2, int y2, int color, int frameCount, int startFrame) :
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DrawCommand(startFrame, frameCount), _x(x), _y(y), _x2(x2), _y2(y2), _color(color)
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{
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//Invert alpha byte - 0 = opaque, 255 = transparent (this way, no need to specifiy alpha channel all the time)
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_color = (~color & 0xFF000000) | (color & 0xFFFFFF);
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}
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};
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