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Added the arc methods to the GDI binding

This commit is contained in:
Benedikt Müssig 2022-05-12 12:52:05 +02:00 committed by GitHub
parent a51d9eec96
commit cacdf6baa4
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1 changed files with 55 additions and 0 deletions
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55
demo/gdi/nuklear_gdi.h
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@ -391,6 +391,60 @@ nk_gdi_stroke_polyline(HDC dc, const struct nk_vec2i *pnts,
}
}
static void
nk_gdi_stroke_arc(HDC dc, short cx, short cy, unsigned short r, float amin, float adelta, unsigned short line_thickness, struct nk_color col)
{
COLORREF color = convert_color(col);
/* setup pen */
HPEN pen = NULL;
if (line_thickness == 1)
SetDCPenColor(dc, color);
else
{
/* the flat endcap makes thick arcs look better */
DWORD pen_style = PS_SOLID | PS_ENDCAP_FLAT | PS_GEOMETRIC;
LOGBRUSH brush;
brush.lbStyle = BS_SOLID;
brush.lbColor = color;
brush.lbHatch = 0;
pen = ExtCreatePen(pen_style, line_thickness, &brush, 0, NULL);
SelectObject(dc, pen);
}
/* calculate arc and draw */
int start_x = cx + (int) ((float)r*nk_cos(amin+adelta)),
start_y = cy + (int) ((float)r*nk_sin(amin+adelta)),
end_x = cx + (int) ((float)r*nk_cos(amin)),
end_y = cy + (int) ((float)r*nk_sin(amin));
SetArcDirection(dc, AD_COUNTERCLOCKWISE);
Pie(dc, cx-r, cy-r, cx+r, cy+r, start_x, start_y, end_x, end_y);
if (pen)
{
SelectObject(dc, GetStockObject(DC_PEN));
DeleteObject(pen);
}
}
static void
nk_gdi_fill_arc(HDC dc, short cx, short cy, unsigned short r, float amin, float adelta, struct nk_color col)
{
COLORREF color = convert_color(col);
SetDCBrushColor(dc, color);
SetDCPenColor(dc, color);
int start_x = cx + (int) ((float)r*nk_cos(amin+adelta)),
start_y = cy + (int) ((float)r*nk_sin(amin+adelta)),
end_x = cx + (int) ((float)r*nk_cos(amin)),
end_y = cy + (int) ((float)r*nk_sin(amin));
Pie(dc, cx-r, cy-r, cx+r, cy+r, start_x, start_y, end_x, end_y);
}
static void
nk_gdi_fill_circle(HDC dc, short x, short y, unsigned short w,
unsigned short h, struct nk_color col)
@ -414,6 +468,7 @@ nk_gdi_stroke_circle(HDC dc, short x, short y, unsigned short w,
SelectObject(dc, pen);
}
SelectObject(dc, GetStockObject(NULL_BRUSH));
SetDCBrushColor(dc, OPAQUE);
Ellipse(dc, x, y, x + w, y + h);