Decrease glyph precision to 1/32 pixel to double max renderable width.

Partial fix to issue #1531
mapbox · Mar 22, 2018 · c340ebe · c340ebe
1 parent 284cb92
commit c340ebe
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Showing 3 changed files with 4 additions and 4 deletions.
diff --git a/src/data/bucket/symbol_bucket.js b/src/data/bucket/symbol_bucket.js
@@ -104,8 +104,8 @@ function addVertex(array, anchorX, anchorY, ox, oy, tx, ty, sizeVertex) {
         // a_pos_offset
         anchorX,
         anchorY,
-        Math.round(ox * 64),
-        Math.round(oy * 64),
+        Math.round(ox * 32),
+        Math.round(oy * 32),
 
         // a_data
         tx, // x coordinate of symbol on glyph atlas texture

diff --git a/src/shaders/symbol_icon.vertex.glsl b/src/shaders/symbol_icon.vertex.glsl
@@ -82,7 +82,7 @@ void main() {
     mat2 rotation_matrix = mat2(angle_cos, -1.0 * angle_sin, angle_sin, angle_cos);
 
     vec4 projected_pos = u_label_plane_matrix * vec4(a_projected_pos.xy, 0.0, 1.0);
-    gl_Position = u_gl_coord_matrix * vec4(projected_pos.xy / projected_pos.w + rotation_matrix * (a_offset / 64.0 * fontScale), 0.0, 1.0);
+    gl_Position = u_gl_coord_matrix * vec4(projected_pos.xy / projected_pos.w + rotation_matrix * (a_offset / 32.0 * fontScale), 0.0, 1.0);
 
     v_tex = a_tex / u_texsize;
     vec2 fade_opacity = unpack_opacity(a_fade_opacity);

diff --git a/src/shaders/symbol_sdf.vertex.glsl b/src/shaders/symbol_sdf.vertex.glsl
@@ -104,7 +104,7 @@ void main() {
     mat2 rotation_matrix = mat2(angle_cos, -1.0 * angle_sin, angle_sin, angle_cos);
 
     vec4 projected_pos = u_label_plane_matrix * vec4(a_projected_pos.xy, 0.0, 1.0);
-    gl_Position = u_gl_coord_matrix * vec4(projected_pos.xy / projected_pos.w + rotation_matrix * (a_offset / 64.0 * fontScale), 0.0, 1.0);
+    gl_Position = u_gl_coord_matrix * vec4(projected_pos.xy / projected_pos.w + rotation_matrix * (a_offset / 32.0 * fontScale), 0.0, 1.0);
     float gamma_scale = gl_Position.w;
 
     vec2 tex = a_tex / u_texsize;