forked from old/legacy-imlib2
Use spans and the span list clipper to do filled ellipses too. Much better.
SVN revision: 3485
This commit is contained in:
parent
227a499f1d
commit
5552e7e064
10
src/api.c
10
src/api.c
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@ -2923,21 +2923,13 @@ imlib_image_fill_ellipse(int xc, int yc, int a, int b)
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__imlib_DirtyImage(im);
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__imlib_DirtyPixmapsForImage(im);
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if (ctxt_cliprect.w)
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{
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__imlib_fill_ellipse_clipped(im, xc, yc, a, b, ctxt_cliprect.x,
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__imlib_fill_ellipse(im, xc, yc, a, b, ctxt_cliprect.x,
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ctxt_cliprect.x + ctxt_cliprect.w,
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ctxt_cliprect.y,
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ctxt_cliprect.y + ctxt_cliprect.h,
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ctxt_color.red, ctxt_color.green,
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ctxt_color.blue, ctxt_color.alpha,
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ctxt_operation);
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}
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else
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{
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__imlib_fill_ellipse(im, xc, yc, a, b, ctxt_color.red, ctxt_color.green,
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ctxt_color.blue, ctxt_color.alpha, ctxt_operation);
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}
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}
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131
src/rgbadraw.c
131
src/rgbadraw.c
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@ -15,6 +15,10 @@
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#define round(a) floor(a+0.5)
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static void
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span(ImlibImage * im, int y, edgeRec * pt1, edgeRec * pt2, DATA8 r, DATA8 g,
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DATA8 b, DATA8 a, ImlibOp op);
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void
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__imlib_FlipImageHoriz(ImlibImage * im)
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{
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@ -1627,8 +1631,9 @@ imlib_clip_line(int x0, int y0, int x1, int y1, int xmin, int xmax, int ymin,
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return accept;
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}
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ImlibOutCode __imlib_comp_outcode(double x, double y, double xmin,
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double xmax, double ymin, double ymax)
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ImlibOutCode
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__imlib_comp_outcode(double x, double y, double xmin, double xmax,
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double ymin, double ymax)
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{
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ImlibOutCode code = 0;
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@ -1643,8 +1648,7 @@ ImlibOutCode __imlib_comp_outcode(double x, double y, double xmin,
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return code;
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}
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ImlibPoly
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__imlib_polygon_new()
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ImlibPoly __imlib_polygon_new()
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{
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ImlibPoly poly;
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@ -1785,46 +1789,7 @@ __imlib_draw_ellipse(ImlibImage * im, int xc, int yc, int aa, int bb, DATA8 r,
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}
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void
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__imlib_fill_ellipse(ImlibImage * im, int xc, int yc, int aa, int bb, DATA8 r,
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DATA8 g, DATA8 b, DATA8 a, ImlibOp op)
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{
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int a2 = aa * aa;
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int b2 = bb * bb;
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int i;
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int x, y, dec;
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for (x = 0, y = bb, dec = 2 * b2 + a2 * (1 - 2 * bb); b2 * x <= a2 * y;
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x++)
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{
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for (i = yc - y; i <= yc + y; i++)
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{
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__imlib_draw_set_point(im, xc - x, i, r, g, b, a, op);
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__imlib_draw_set_point(im, xc + x, i, r, g, b, a, op);
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}
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if (dec >= 0)
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dec += 4 * a2 * (1 - (y--));
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dec += b2 * (4 * x + 6);
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}
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for (x = aa, y = 0, dec = 2 * a2 + b2 * (1 - 2 * aa); a2 * y <= b2 * x;
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y++)
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{
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for (i = yc - y; i <= yc + y; i++)
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{
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__imlib_draw_set_point(im, xc + x, i, r, g, b, a, op);
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__imlib_draw_set_point(im, xc - x, i, r, g, b, a, op);
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}
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if (dec >= 0)
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dec += 4 * b2 * (1 - (x--));
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dec += a2 * (4 * y + 6);
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}
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}
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void
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__imlib_fill_ellipse_clipped(ImlibImage * im, int xc, int yc, int aa, int bb,
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__imlib_fill_ellipse(ImlibImage * im, int xc, int yc, int aa, int bb,
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int clip_xmin, int clip_xmax, int clip_ymin,
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int clip_ymax, DATA8 r, DATA8 g, DATA8 b,
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DATA8 a, ImlibOp op)
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@ -1832,26 +1797,25 @@ __imlib_fill_ellipse_clipped(ImlibImage * im, int xc, int yc, int aa, int bb,
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int a2 = aa * aa;
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int b2 = bb * bb;
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int i;
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int y1, y2, x1, x2;
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int x, y, dec;
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int miny, maxy, iy1;
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edgeRec *table1, *table2;
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table1 = malloc(sizeof(edgeRec) * im->h);
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table2 = malloc(sizeof(edgeRec) * im->h);
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miny = yc - bb;
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maxy = yc + bb;
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for (x = 0, y = bb, dec = 2 * b2 + a2 * (1 - 2 * bb); b2 * x <= a2 * y;
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x++)
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{
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y1 = yc - y;
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y2 = yc + y;
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if (y1 < clip_ymin)
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y1 = clip_ymin;
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if (y2 > clip_ymax)
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y2 = clip_ymax;
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for (i = y1; i <= y2; i++)
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{
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if ((xc - x) >= clip_xmin && (xc - x) <= clip_xmax)
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__imlib_draw_set_point(im, xc - x, i, r, g, b, a, op);
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if ((xc + x) >= clip_xmin && (xc + x) <= clip_xmax)
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__imlib_draw_set_point(im, xc + x, i, r, g, b, a, op);
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}
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table1[yc - y].x = xc - x;
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table2[yc - y].x = xc + x;
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table1[yc + y].x = xc - x;
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table2[yc + y].x = xc + x;
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if (dec >= 0)
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dec += 4 * a2 * (1 - (y--));
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@ -1861,27 +1825,34 @@ __imlib_fill_ellipse_clipped(ImlibImage * im, int xc, int yc, int aa, int bb,
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for (x = aa, y = 0, dec = 2 * a2 + b2 * (1 - 2 * aa); a2 * y <= b2 * x;
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y++)
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{
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y1 = yc - y;
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y2 = yc + y;
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if (y1 < clip_ymin)
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y1 = clip_ymin;
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if (y2 > clip_ymax)
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y2 = clip_ymax;
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table1[yc - y].x = xc - x;
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table2[yc - y].x = xc + x;
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for (i = y1; i <= y2; i++)
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{
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if ((xc + x) >= clip_xmin && (xc + x) <= clip_xmax)
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__imlib_draw_set_point(im, xc + x, i, r, g, b, a, op);
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if ((xc - x) >= clip_xmin && (xc - x) <= clip_xmax)
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__imlib_draw_set_point(im, xc - x, i, r, g, b, a, op);
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}
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table1[yc + y].x = xc - x;
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table2[yc + y].x = xc + x;
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if (dec >= 0)
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dec += 4 * b2 * (1 - (x--));
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dec += a2 * (4 * y + 6);
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}
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}
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/* clip spans to screen */
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__spanlist_clip(table1, table2, &miny, &maxy, 0, im->w, 0, im->h);
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/* clip to clip rect if it's there */
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if (clip_xmin != clip_xmax)
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__spanlist_clip(table1, table2, &miny, &maxy, clip_xmin, clip_xmax,
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clip_ymin, clip_ymax);
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do
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{
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span(im, miny, &table1[miny], &table2[miny], r, g, b, a, op);
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miny++;
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}
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while (miny < maxy);
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free(table1);
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free(table2);
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}
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void
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__imlib_draw_ellipse_clipped(ImlibImage * im, int xc, int yc, int aa, int bb,
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@ -1968,7 +1939,7 @@ __imlib_draw_set_point_clipped(ImlibImage * im, int x, int y, int clip_xmin,
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DATA32 *p;
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int tmp;
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if ((x >= 0 && x < im->w) && (y >= 0 && y <= im->h))
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if (XY_IN_RECT(x, y, 0, 0, im->w, im->h))
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{
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if (XY_IN_RECT
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(x, y, clip_xmin, clip_ymin, clip_xmax - clip_xmin,
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@ -2003,15 +1974,12 @@ edge(edgeRec * table, ImlibPoint * pt1, ImlibPoint * pt2)
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int idy, iy1, iy2;
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if (pt2->y < pt1->y)
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{
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exchange(ImlibPoint *, pt1, pt2)}
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exchange(ImlibPoint *, pt1, pt2);
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iy1 = pt1->y;
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iy2 = pt2->y;
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idy = iy2 - iy1;
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if (idy == 0)
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{
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return;
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}
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idy = MAX(2, idy - 1);
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x = pt1->x;
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dx = (pt2->x - pt1->x) / idy;
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@ -2253,13 +2221,6 @@ __imlib_polygon_contains_point(ImlibPoly poly, int x, int y)
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return (count % 2 == 1);
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}
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unsigned char
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__imlib_point_on_segment(int p_x, int p_y, int s1_x, int s1_y, int s2_x,
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int s2_y)
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{
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return __imlib_segments_intersect(p_x, p_y, p_x, p_y, s1_x, s1_y, s2_x,
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s2_y);
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}
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unsigned char
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__imlib_segments_intersect(int r1_x, int r1_y, int r2_x, int r2_y, int s1_x,
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@ -30,6 +30,9 @@
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(s1_y != s2_y) ? (p_y <= MAX(s1_y, s2_y) && p_y >= MIN(s1_y, s2_y)) : (p_x <= MAX(s1_x, s2_x) && p_x >= MIN(s1_x, s2_x))
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#define SWAP(a,b) {int _tmp_; _tmp_ = a; a = b; b = _tmp_;}
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#define __imlib_point_on_segment(p_x, p_y, s1_x, s1_y, s2_x, s2_y) \
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__imlib_segments_intersect(p_x, p_y, p_x, p_y, s1_x, s1_y, s2_x, s2_y)
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typedef struct _edgerec
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{
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@ -134,16 +137,11 @@ void __imlib_draw_polygon_filled(ImlibImage * im, ImlibPoly poly,
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int clip_xmin, int clip_xmax, int clip_ymin,
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int clip_ymax, DATA8 r, DATA8 g, DATA8 b,
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DATA8 a, ImlibOp op);
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void __imlib_fill_ellipse(ImlibImage * im, int xc, int yc, int aa, int bb,
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DATA8 r, DATA8 g, DATA8 b, DATA8 a, ImlibOp op);
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void __imlib_fill_ellipse_clipped(ImlibImage * im, int xc, int yc, int aa,
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void __imlib_fill_ellipse(ImlibImage * im, int xc, int yc, int aa,
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int bb, int clip_xmin, int clip_xmax,
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int clip_ymin, int clip_ymax, DATA8 r,
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DATA8 g, DATA8 b, DATA8 a, ImlibOp op);
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unsigned char __imlib_polygon_contains_point(ImlibPoly poly, int x, int y);
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unsigned char __imlib_point_on_segment(int p_x, int p_y, int s1_x, int s1_y,
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int s2_x, int s2_y);
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unsigned char __imlib_segments_intersect(int r1_x, int r1_y, int r2_x,
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int r2_y, int s1_x, int s1_y,
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int s2_x, int s2_y);
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