107     v->codeAppend ("float2 tan = normalize(endpts.zw - endpts.xy);");  in onEmitCode()
108     v->codeAppend ("float2 n = float2(tan.y, -tan.x);");  in onEmitCode()
109     v->codeAppend ("float nwidth = abs(n.x) + abs(n.y);");  in onEmitCode()
112     v->codeAppend ("float2 outset = tan*nwidth/2;");  in onEmitCode()
113     v->codeAppend ("float2 position = (sk_VertexID < 2) "  in onEmitCode()
126     v->codeAppend ("outset = n * (stroke_radius + nwidth/2);");  in onEmitCode()
127     v->codeAppend ("position += (0 == (sk_VertexID & 1)) ? +outset : -outset;");  in onEmitCode()
198     v->codeAppend ("float4x2 P = transpose(float2x4(X, Y));");  in onEmitCode()
199     v->codeAppend ("float stroke_radius = stroke_info[0];");  in onEmitCode()
200     v->codeAppend ("float num_segments = stroke_info[1];");  in onEmitCode()
204     v->codeAppend ("float point_id = float(sk_VertexID/2);");  in onEmitCode()
205     v->codeAppend ("float T = max((point_id - 1) / num_segments, 0);");  in onEmitCode()
206     v->codeAppend ("T = (point_id >= num_segments + 1) ? 1 : T;");  // In case x/x !== 1.  in onEmitCode()
211     v->codeAppend ("float2 ab = mix(P[0], P[1], T);");  in onEmitCode()
212     v->codeAppend ("float2 bc = mix(P[1], P[2], T);");  in onEmitCode()
213     v->codeAppend ("float2 cd = mix(P[2], P[3], T);");  in onEmitCode()
214     v->codeAppend ("float2 abc = mix(ab, bc, T);");  in onEmitCode()
215     v->codeAppend ("float2 bcd = mix(bc, cd, T);");  in onEmitCode()
216     v->codeAppend ("float2 position = mix(abc, bcd, T);");  in onEmitCode()
217     v->codeAppend ("float2 tan = bcd - abc;");  in onEmitCode()
222     v->codeAppend ("if (0 == T && P[0] == P[1]) {");  in onEmitCode()
223     v->codeAppend (    "tan = P[2] - P[0];");  in onEmitCode()
224     v->codeAppend ("}");  in onEmitCode()
225     v->codeAppend ("if (1 == T && P[2] == P[3]) {");  in onEmitCode()
226     v->codeAppend (    "tan = P[3] - P[1];");  in onEmitCode()
227     v->codeAppend ("}");  in onEmitCode()
228     v->codeAppend ("tan = normalize(tan);");  in onEmitCode()
229     v->codeAppend ("float2 n = float2(tan.y, -tan.x);");  in onEmitCode()
230     v->codeAppend ("float nwidth = abs(n.x) + abs(n.y);");  in onEmitCode()
233     v->codeAppend ("float2 outset = n * (stroke_radius + nwidth/2);");  in onEmitCode()
234     v->codeAppend ("position += (0 == (sk_VertexID & 1)) ? -outset : +outset;");  in onEmitCode()
246     v->codeAppend ("if (0 == point_id || num_segments+1 == point_id) {");  in onEmitCode()
247     v->codeAppend (    "position -= tan*nwidth/2;");  in onEmitCode()
248     v->codeAppend ("}");  in onEmitCode()
249     v->codeAppend ("if (1 == point_id || num_segments+2 == point_id) {");  in onEmitCode()
250     v->codeAppend (    "position += tan*nwidth/2;");  in onEmitCode()
251     v->codeAppend ("}");  in onEmitCode()
264     f->codeAppend ("half coverage = edge_coverages.x + edge_coverages.y;");  in onEmitCode()