Mercurial > hg > dmlib
diff dmdrawline.h @ 234:a2abd0b991b6
Modularize line drawing related templates and functions, add clipping
functions to dmlib.h.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Mon, 08 Oct 2012 15:21:59 +0300 |
| parents | 79dac918c81e |
| children | 51ba74f7668c |
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--- a/dmdrawline.h Mon Oct 08 09:01:16 2012 +0300 +++ b/dmdrawline.h Mon Oct 08 15:21:59 2012 +0300 @@ -5,7 +5,11 @@ * (C) Copyright 2011-2012 Tecnic Software productions (TNSP) */ -int DM_DRAWLINE_NAME (SDL_Surface *screen, int x0, int y0, int x1, int y1, const Uint32 col) +int DM_DRAWLINE_NAME (SDL_Surface *screen, int x0, int y0, int x1, int y1, const Uint32 col +#ifdef DM_DRAWLINE_ARGS + DM_DRAWLINE_ARGS +#endif +) #ifdef DM_HEADER ; #else @@ -14,7 +18,7 @@ const int qpitch = screen->pitch / DM_DRAWLINE_DST_BYTES; // Clipping - if (dmClipLineCoordsInt(&x0, &y0, &x1, &y1, screen) < 0) + if (dmClipLineCoordsInt(screen, &x0, &y0, &x1, &y1) < 0) return -1; // Compute initial deltas @@ -33,14 +37,17 @@ if (dy < 0) { dy = -dy; - ystep = -qpitch; + ystep = -1; } else - ystep = qpitch; + ystep = 1; +#ifndef DM_DRAWLINE_SPEC // Compute offsets y0 *= qpitch; y1 *= qpitch; + ystep *= qpitch; +#endif #ifdef DM_DRAWLINE_INIT DM_DRAWLINE_INIT @@ -89,6 +96,7 @@ #endif #undef DM_DRAWLINE_NAME +#undef DM_DRAWLINE_ARGS #undef DM_DRAWLINE_DST_BYTES #undef DM_DRAWLINE_DST_TYPE #undef DM_DRAWLINE_INIT