#include "ShelfPacker.h"

namespace sh::render

{

ShelfPacker::ShelfPacker(int texW, int texH, int padding)

{

this->texW = texW; this->texH = texH;

this->padding = padding;

cursorX = 0;

cursorY = 0;

shelfH = 0;

}

SH_RENDER_API void ShelfPacker::Reset()

{

cursorX = 0;

cursorY = 0;

shelfH = 0;

}

SH_RENDER_API auto ShelfPacker::Alloc(int w, int h, int& outX, int& outY) -> bool

{

w += padding * 2;

h += padding * 2;

if (w > texW || h > texH)

return false;

if (cursorX + w > texW)

{

cursorX = 0;

cursorY += shelfH;

shelfH = 0;

}

if (cursorY + h > texH)

return false;

outX = cursorX + padding;

outY = cursorY + padding;

cursorX += w;

if (h > shelfH)

shelfH = h;

return true;

}

}//namespace