Fix beziers on GPU.

[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 56dddbe..bb9a219 100644 (file)
--- a/src/shaders/bezier_texbuf_geom.glsl
+++ b/src/shaders/bezier_texbuf_geom.glsl
@@ -19,9 +19,9 @@ void main()
 {
        int bezierid = texelFetch(bezier_id_buffer_texture, objectid[0]).r;
        vec2 boundssize = gl_in[1].gl_Position.xy - gl_in[0].gl_Position.xy;
 {
        int bezierid = texelFetch(bezier_id_buffer_texture, objectid[0]).r;
        vec2 boundssize = gl_in[1].gl_Position.xy - gl_in[0].gl_Position.xy;

-       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;
+       vec2 coeff0 = texelFetch(bezier_buffer_texture, bezierid*3).rg;
+       vec2 coeff1 = texelFetch(bezier_buffer_texture, bezierid*3+1).rg;
+       vec2 coeff2 = texelFetch(bezier_buffer_texture, bezierid*3+2).rg;

        vec2 boundspxsize = pixsize[0];
        int blen = clamp(int(abs(boundspxsize.x)),2,100);
        float invblen = 1.0f/float(blen);
        vec2 boundspxsize = pixsize[0];
        int blen = clamp(int(abs(boundspxsize.x)),2,100);
        float invblen = 1.0f/float(blen);


@@ -32,7 +32,7 @@ void main()
                float bernstein0 = t*t;
                float bernstein1 = 2*t*oneminust;
                float bernstein2 = oneminust*oneminust;
                float bernstein0 = t*t;
                float bernstein1 = 2*t*oneminust;
                float bernstein2 = oneminust*oneminust;

-               gl_Position = vec4(coeff0*bernstein0 + coeff1*bernstein1 + coeff2*bernstein2, 0.0, 1.0);
+               gl_Position = vec4((coeff0*bernstein0 + coeff1*bernstein1 + coeff2*bernstein2) * boundssize + gl_in[0].gl_Position.xy, 0.0, 1.0);

                EmitVertex();
                
        }
                EmitVertex();
                
        }