Kayne Ruse
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/* Copyright: (c) Kayne Ruse 2013
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*/
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#include "tile_sheet.hpp"
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#include <stdexcept>
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SDL_Surface* TileSheet::LoadSurface(std::string fname, Uint16 w, Uint16 h) {
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//setup the image
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image.LoadSurface(fname);
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image.SetClipW(w);
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image.SetClipH(h);
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//get the tile counts
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xCount = image.GetSurface()->w / w;
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yCount = image.GetSurface()->h / h;
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totalCount = xCount * yCount;
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//set begin & end (usually temporary)
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begin = 0;
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end = totalCount;
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}
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SDL_Surface* TileSheet::GetSurface() {
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return image.GetSurface();
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}
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void TileSheet::FreeSurface() {
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image.FreeSurface();
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totalCount = xCount = yCount = 0;
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begin = end = -1;
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}
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void TileSheet::DrawTo(SDL_Surface* const dest, int x, int y, int tileIndex) {
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if (!InRange(tileIndex)) {
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throw(std::invalid_argument("Tile index out of range"));
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}
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Sint16 clipX = (tileIndex-begin) % xCount * image.GetClipW();
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Sint16 clipY = (tileIndex-begin) / xCount * image.GetClipH();
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image.SetClipX(clipX);
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image.SetClipY(clipY);
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image.DrawTo(dest, x, y);
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}
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