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https://github.com/ultimatepp/ultimatepp.git
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87 lines
No EOL
2.2 KiB
C++
87 lines
No EOL
2.2 KiB
C++
#include "GLPainter.h"
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namespace Upp {
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void GLDrawPolylines(const GLContext2D& dd, Pointf at, const GLVertexData& mesh, Sizef scale,
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double width, Color color, double alpha)
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{
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static GLCode program(R"(
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#version 330 core
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in vec4 pos;
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uniform vec2 offset;
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uniform vec2 scale;
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uniform vec2 scale2;
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uniform vec2 width;
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void main()
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{
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vec2 v = scale2 * pos.zw;
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gl_Position = vec4(scale * (scale2 * pos.xy + width * normalize(vec2(-v.y, v.x))) + offset, 0, 1);
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}
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)", R"(
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#version 330 core
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uniform vec4 color;
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void main()
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{
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gl_FragColor = color;
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}
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)");
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static int ioffset = program["offset"];
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static int iscale = program["scale"];
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static int iscale2 = program["scale2"];
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static int iwidth = program["width"];
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static int icolor = program["color"];
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alpha *= dd.alpha;
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program(ioffset, Pointf(dd.vs) * at + Sizef(-1, 1))
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(iscale, dd.vs)
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(iscale2, scale)
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(iwidth, Sizef(width / 2, width / 2))
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(icolor, color, alpha)
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;
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if(alpha == 1) {
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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mesh.Draw(program);
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}
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else {
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glDisable(GL_BLEND);
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glDisable(GL_CULL_FACE);
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glEnable(GL_STENCIL_TEST);
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glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
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glStencilFunc(GL_NEVER, 1, 1);
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glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
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mesh.Draw(program);
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GLDrawStencil(color, dd.alpha * alpha);
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}
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}
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void DashPolyline(Vector<Vector<Pointf>>& polyline, const Vector<Pointf>& line,
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const Vector<double>& pattern, double distance = 0)
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{
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struct LineStore : LinearPathConsumer {
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Vector<Vector<Pointf>>& polyline;
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void Move(const Pointf& p) override { DLOG("MOVE " << p); polyline.Add().Add(p); }
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void Line(const Pointf& p) override { DLOG("LINE " << p); polyline.Top().Add(p); }
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LineStore(Vector<Vector<Pointf>>& polyline) : polyline(polyline) {}
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};
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LineStore st(polyline);
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Dasher dasher;
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dasher.target = &st;
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dasher.Init(pattern, distance);
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for(int i = 0; i < line.GetCount(); i++)
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if(i)
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dasher.Line(line[i]);
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else
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dasher.Move(line[i]);
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dasher.End();
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}
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}; |