Maybe don't use all of the lines. Or maybe do.

[ipdf/code.git] / src / shaders / bezier_texbuf_geom.glsl

diff --git a/src/shaders/bezier_texbuf_geom.glsl b/src/shaders/bezier_texbuf_geom.glsl
index caf7a10..56dddbe 100644 (file)
--- a/src/shaders/bezier_texbuf_geom.glsl
+++ b/src/shaders/bezier_texbuf_geom.glsl
@@ -7,6 +7,13 @@ layout(lines) in;
 layout(line_strip, max_vertices = 101) out;
 
 in int objectid[];
+in vec2 pixsize[];
+
+//TODO: I thought this might be useful, maybe not.
+float areatriangle(vec2 a, vec2 b, vec2 c)
+{
+       return (c.y-a.y)*(b.y-a.y) - (b.x - a.x)*(c.x-a.x);
+}
 
 void main()
 {
@@ -15,9 +22,12 @@ void main()
        vec2 coeff0 = texelFetch(bezier_buffer_texture, bezierid*3).rg + gl_in[0].gl_Position.xy ;
        vec2 coeff1 = texelFetch(bezier_buffer_texture, bezierid*3+1).rg * boundssize + gl_in[0].gl_Position.xy;
        vec2 coeff2 = texelFetch(bezier_buffer_texture, bezierid*3+2).rg * boundssize + gl_in[0].gl_Position.xy;
-       for (int i = 0; i <= 100; ++i)
+       vec2 boundspxsize = pixsize[0];
+       int blen = clamp(int(abs(boundspxsize.x)),2,100);
+       float invblen = 1.0f/float(blen);
+       for (int i = 0; i <= blen; ++i)
        {
-               float t = i * 0.01f;
+               float t = i * invblen;
                float oneminust = 1.0f - t;
                float bernstein0 = t*t;
                float bernstein1 = 2*t*oneminust;