diff options
Diffstat (limited to 'src/opengl/util/trap_exact_aa.glsl')
| -rw-r--r-- | src/opengl/util/trap_exact_aa.glsl | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/opengl/util/trap_exact_aa.glsl b/src/opengl/util/trap_exact_aa.glsl index b96f87d..1637f43 100644 --- a/src/opengl/util/trap_exact_aa.glsl +++ b/src/opengl/util/trap_exact_aa.glsl @@ -14,7 +14,7 @@ float quad_aa() vec2 invA = gl_TexCoord[0].zw; // transform right line to left to be able to use same calculations for both - vecX.zw = 2 * gl_FragCoord.x - vecX.zw; + vecX.zw = 2.0 * gl_FragCoord.x - vecX.zw; vec2 topX = vec2(vecX.x, vecX.z); vec2 bottomX = vec2(vecX.y, vecX.w); @@ -33,18 +33,18 @@ float quad_aa() vec2 temp = mix(area - 0.5 * (right - bottomXTemp) * (intersectY.yw - bottom), // left < bottom < right < top (0.5 * (topXTemp + bottomXTemp) - left) * area, // left < bottom < top < right - step(topXTemp, right)); + step(topXTemp, right.xx)); vec2 excluded = 0.5 * (top - intersectY.xz) * (topXTemp - left); // bottom < left < top < right excluded = mix((top - 0.5 * (intersectY.yw + intersectY.xz)) * (right - left), // bottom < left < right < top - excluded, step(topXTemp, right)); + excluded, step(topXTemp, right.xx)); excluded = mix(temp, // left < bottom < right (see calculation of temp) - excluded, step(bottomXTemp, left)); + excluded, step(bottomXTemp, left.xx)); excluded = mix(vec2(area, area), // right < bottom < top - excluded, step(bottomXTemp, right)); + excluded, step(bottomXTemp, right.xx)); excluded *= step(left, topXTemp); @@ -53,6 +53,6 @@ float quad_aa() void main() { - gl_FragColor = quad_aa(); + gl_FragColor = quad_aa().xxxx; } |