1 files changed, 280 insertions, 0 deletions
diff --git a/src/mbgl/shaders/circle.cpp b/src/mbgl/shaders/circle.cpp
index e027975533..6027c1773f 100644
--- a/src/mbgl/shaders/circle.cpp
+++ b/src/mbgl/shaders/circle.cpp
@@ -10,5 +10,285 @@ const char* circle::name = "circle";
 const char* circle::vertexSource = source() + 4416;
 const char* circle::fragmentSource = source() + 8666;
 
+// Uncompressed source of circle.vertex.glsl:
+/*
+uniform mat4 u_matrix;
+uniform bool u_scale_with_map;
+uniform bool u_pitch_with_map;
+uniform vec2 u_extrude_scale;
+uniform highp float u_camera_to_center_distance;
+
+attribute vec2 a_pos;
+
+
+#ifndef HAS_UNIFORM_u_color
+uniform lowp float a_color_t;
+attribute highp vec4 a_color;
+varying highp vec4 color;
+#else
+uniform highp vec4 u_color;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_radius
+uniform lowp float a_radius_t;
+attribute mediump vec2 a_radius;
+varying mediump float radius;
+#else
+uniform mediump float u_radius;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_blur
+uniform lowp float a_blur_t;
+attribute lowp vec2 a_blur;
+varying lowp float blur;
+#else
+uniform lowp float u_blur;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_opacity
+uniform lowp float a_opacity_t;
+attribute lowp vec2 a_opacity;
+varying lowp float opacity;
+#else
+uniform lowp float u_opacity;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_stroke_color
+uniform lowp float a_stroke_color_t;
+attribute highp vec4 a_stroke_color;
+varying highp vec4 stroke_color;
+#else
+uniform highp vec4 u_stroke_color;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_stroke_width
+uniform lowp float a_stroke_width_t;
+attribute mediump vec2 a_stroke_width;
+varying mediump float stroke_width;
+#else
+uniform mediump float u_stroke_width;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_stroke_opacity
+uniform lowp float a_stroke_opacity_t;
+attribute lowp vec2 a_stroke_opacity;
+varying lowp float stroke_opacity;
+#else
+uniform lowp float u_stroke_opacity;
+#endif
+
+
+varying vec3 v_data;
+
+void main(void) {
+    
+#ifndef HAS_UNIFORM_u_color
+    color = unpack_mix_color(a_color, a_color_t);
+#else
+    highp vec4 color = u_color;
+#endif
+
+    
+#ifndef HAS_UNIFORM_u_radius
+    radius = unpack_mix_vec2(a_radius, a_radius_t);
+#else
+    mediump float radius = u_radius;
+#endif
+
+    
+#ifndef HAS_UNIFORM_u_blur
+    blur = unpack_mix_vec2(a_blur, a_blur_t);
+#else
+    lowp float blur = u_blur;
+#endif
+
+    
+#ifndef HAS_UNIFORM_u_opacity
+    opacity = unpack_mix_vec2(a_opacity, a_opacity_t);
+#else
+    lowp float opacity = u_opacity;
+#endif
+
+    
+#ifndef HAS_UNIFORM_u_stroke_color
+    stroke_color = unpack_mix_color(a_stroke_color, a_stroke_color_t);
+#else
+    highp vec4 stroke_color = u_stroke_color;
+#endif
+
+    
+#ifndef HAS_UNIFORM_u_stroke_width
+    stroke_width = unpack_mix_vec2(a_stroke_width, a_stroke_width_t);
+#else
+    mediump float stroke_width = u_stroke_width;
+#endif
+
+    
+#ifndef HAS_UNIFORM_u_stroke_opacity
+    stroke_opacity = unpack_mix_vec2(a_stroke_opacity, a_stroke_opacity_t);
+#else
+    lowp float stroke_opacity = u_stroke_opacity;
+#endif
+
+
+    // unencode the extrusion vector that we snuck into the a_pos vector
+    vec2 extrude = vec2(mod(a_pos, 2.0) * 2.0 - 1.0);
+
+    // multiply a_pos by 0.5, since we had it * 2 in order to sneak
+    // in extrusion data
+    vec2 circle_center = floor(a_pos * 0.5);
+    if (u_pitch_with_map) {
+        vec2 corner_position = circle_center;
+        if (u_scale_with_map) {
+            corner_position += extrude * (radius + stroke_width) * u_extrude_scale;
+        } else {
+            // Pitching the circle with the map effectively scales it with the map
+            // To counteract the effect for pitch-scale: viewport, we rescale the
+            // whole circle based on the pitch scaling effect at its central point
+            vec4 projected_center = u_matrix * vec4(circle_center, 0, 1);
+            corner_position += extrude * (radius + stroke_width) * u_extrude_scale * (projected_center.w / u_camera_to_center_distance);
+        }
+
+        gl_Position = u_matrix * vec4(corner_position, 0, 1);
+    } else {
+        gl_Position = u_matrix * vec4(circle_center, 0, 1);
+
+        if (u_scale_with_map) {
+            gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * u_camera_to_center_distance;
+        } else {
+            gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * gl_Position.w;
+        }
+    }
+
+    // This is a minimum blur distance that serves as a faux-antialiasing for
+    // the circle. since blur is a ratio of the circle's size and the intent is
+    // to keep the blur at roughly 1px, the two are inversely related.
+    lowp float antialiasblur = 1.0 / DEVICE_PIXEL_RATIO / (radius + stroke_width);
+
+    v_data = vec3(extrude.x, extrude.y, antialiasblur);
+}
+
+*/
+
+// Uncompressed source of circle.fragment.glsl:
+/*
+
+#ifndef HAS_UNIFORM_u_color
+varying highp vec4 color;
+#else
+uniform highp vec4 u_color;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_radius
+varying mediump float radius;
+#else
+uniform mediump float u_radius;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_blur
+varying lowp float blur;
+#else
+uniform lowp float u_blur;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_opacity
+varying lowp float opacity;
+#else
+uniform lowp float u_opacity;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_stroke_color
+varying highp vec4 stroke_color;
+#else
+uniform highp vec4 u_stroke_color;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_stroke_width
+varying mediump float stroke_width;
+#else
+uniform mediump float u_stroke_width;
+#endif
+
+
+#ifndef HAS_UNIFORM_u_stroke_opacity
+varying lowp float stroke_opacity;
+#else
+uniform lowp float u_stroke_opacity;
+#endif
+
+
+varying vec3 v_data;
+
+void main() {
+    
+#ifdef HAS_UNIFORM_u_color
+    highp vec4 color = u_color;
+#endif
+
+    
+#ifdef HAS_UNIFORM_u_radius
+    mediump float radius = u_radius;
+#endif
+
+    
+#ifdef HAS_UNIFORM_u_blur
+    lowp float blur = u_blur;
+#endif
+
+    
+#ifdef HAS_UNIFORM_u_opacity
+    lowp float opacity = u_opacity;
+#endif
+
+    
+#ifdef HAS_UNIFORM_u_stroke_color
+    highp vec4 stroke_color = u_stroke_color;
+#endif
+
+    
+#ifdef HAS_UNIFORM_u_stroke_width
+    mediump float stroke_width = u_stroke_width;
+#endif
+
+    
+#ifdef HAS_UNIFORM_u_stroke_opacity
+    lowp float stroke_opacity = u_stroke_opacity;
+#endif
+
+
+    vec2 extrude = v_data.xy;
+    float extrude_length = length(extrude);
+
+    lowp float antialiasblur = v_data.z;
+    float antialiased_blur = -max(blur, antialiasblur);
+
+    float opacity_t = smoothstep(0.0, antialiased_blur, extrude_length - 1.0);
+
+    float color_t = stroke_width < 0.01 ? 0.0 : smoothstep(
+        antialiased_blur,
+        0.0,
+        extrude_length - radius / (radius + stroke_width)
+    );
+
+    gl_FragColor = opacity_t * mix(color * opacity, stroke_color * stroke_opacity, color_t);
+
+#ifdef OVERDRAW_INSPECTOR
+    gl_FragColor = vec4(1.0);
+#endif
+}
+
+*/
+
 } // namespace shaders
 } // namespace mbgl