1 files changed, 53 insertions, 6 deletions

diff --git a/src/mbgl/shaders/line_sdf.cpp b/src/mbgl/shaders/line_sdf.cpp
index b37bf688d4..168f4ca98d 100644
--- a/src/mbgl/shaders/line_sdf.cpp
+++ b/src/mbgl/shaders/line_sdf.cpp
@@ -33,7 +33,6 @@ uniform float u_tex_y_a;
 uniform vec2 u_patternscale_b;
 uniform float u_tex_y_b;
 uniform vec2 u_gl_units_to_pixels;
-uniform mediump float u_width;
 
 varying vec2 v_normal;
 varying vec2 v_width2;
@@ -80,6 +79,22 @@ attribute lowp vec2 a_offset;
 uniform lowp float u_offset;
 #endif
 
+#ifndef HAS_UNIFORM_u_width
+uniform lowp float a_width_t;
+attribute mediump vec2 a_width;
+varying mediump float width;
+#else
+uniform mediump float u_width;
+#endif
+
+#ifndef HAS_UNIFORM_u_floorwidth
+uniform lowp float a_floorwidth_t;
+attribute lowp vec2 a_floorwidth;
+varying lowp float floorwidth;
+#else
+uniform lowp float u_floorwidth;
+#endif
+
 void main() {
 
 #ifndef HAS_UNIFORM_u_color
@@ -112,6 +127,18 @@ void main() {
     lowp float offset = u_offset;
 #endif
 
+#ifndef HAS_UNIFORM_u_width
+    width = unpack_mix_vec2(a_width, a_width_t);
+#else
+    mediump float width = u_width;
+#endif
+
+#ifndef HAS_UNIFORM_u_floorwidth
+    floorwidth = unpack_mix_vec2(a_floorwidth, a_floorwidth_t);
+#else
+    lowp float floorwidth = u_floorwidth;
+#endif
+
     vec2 a_extrude = a_data.xy - 128.0;
     float a_direction = mod(a_data.z, 4.0) - 1.0;
     float a_linesofar = (floor(a_data.z / 4.0) + a_data.w * 64.0) * LINE_DISTANCE_SCALE;
@@ -127,11 +154,11 @@ void main() {
     // these transformations used to be applied in the JS and native code bases. 
     // moved them into the shader for clarity and simplicity. 
     gapwidth = gapwidth / 2.0;
-    float width = u_width / 2.0;
+    float halfwidth = width / 2.0;
     offset = -1.0 * offset;
  
     float inset = gapwidth + (gapwidth > 0.0 ? ANTIALIASING : 0.0);
-    float outset = gapwidth + width * (gapwidth > 0.0 ? 2.0 : 1.0) + ANTIALIASING;
+    float outset = gapwidth + halfwidth * (gapwidth > 0.0 ? 2.0 : 1.0) + ANTIALIASING;
 
     // Scale the extrusion vector down to a normal and then up by the line width
     // of this vertex.
@@ -156,8 +183,8 @@ void main() {
     float extrude_length_with_perspective = length(projected_extrude.xy / gl_Position.w * u_gl_units_to_pixels);
     v_gamma_scale = extrude_length_without_perspective / extrude_length_with_perspective;
 
-    v_tex_a = vec2(a_linesofar * u_patternscale_a.x, normal.y * u_patternscale_a.y + u_tex_y_a);
-    v_tex_b = vec2(a_linesofar * u_patternscale_b.x, normal.y * u_patternscale_b.y + u_tex_y_b);
+    v_tex_a = vec2(a_linesofar * u_patternscale_a.x / floorwidth, normal.y * u_patternscale_a.y + u_tex_y_a);
+    v_tex_b = vec2(a_linesofar * u_patternscale_b.x / floorwidth, normal.y * u_patternscale_b.y + u_tex_y_b);
 
     v_width2 = vec2(outset, inset);
 }
@@ -194,6 +221,18 @@ varying lowp float opacity;
 uniform lowp float u_opacity;
 #endif
 
+#ifndef HAS_UNIFORM_u_width
+varying mediump float width;
+#else
+uniform mediump float u_width;
+#endif
+
+#ifndef HAS_UNIFORM_u_floorwidth
+varying lowp float floorwidth;
+#else
+uniform lowp float u_floorwidth;
+#endif
+
 void main() {
 
 #ifdef HAS_UNIFORM_u_color
@@ -208,6 +247,14 @@ void main() {
     lowp float opacity = u_opacity;
 #endif
 
+#ifdef HAS_UNIFORM_u_width
+    mediump float width = u_width;
+#endif
+
+#ifdef HAS_UNIFORM_u_floorwidth
+    lowp float floorwidth = u_floorwidth;
+#endif
+
     // Calculate the distance of the pixel from the line in pixels.
     float dist = length(v_normal) * v_width2.s;
 
@@ -220,7 +267,7 @@ void main() {
     float sdfdist_a = texture2D(u_image, v_tex_a).a;
     float sdfdist_b = texture2D(u_image, v_tex_b).a;
     float sdfdist = mix(sdfdist_a, sdfdist_b, u_mix);
-    alpha *= smoothstep(0.5 - u_sdfgamma, 0.5 + u_sdfgamma, sdfdist);
+    alpha *= smoothstep(0.5 - u_sdfgamma / floorwidth, 0.5 + u_sdfgamma / floorwidth, sdfdist);
 
     gl_FragColor = color * (alpha * opacity);