1 files changed, 142 insertions, 0 deletions
diff --git a/src/mbgl/shaders/symbol_icon.cpp b/src/mbgl/shaders/symbol_icon.cpp
index 47b9c9b331..5b34d490bb 100644
--- a/src/mbgl/shaders/symbol_icon.cpp
+++ b/src/mbgl/shaders/symbol_icon.cpp
@@ -10,5 +10,147 @@ const char* symbol_icon::name = "symbol_icon";
 const char* symbol_icon::vertexSource = source() + 70714;
 const char* symbol_icon::fragmentSource = source() + 74120;
 
+// Uncompressed source of symbol_icon.vertex.glsl:
+/*
+const float PI = 3.141592653589793;
+
+attribute vec4 a_pos_offset;
+attribute vec4 a_data;
+attribute vec3 a_projected_pos;
+attribute float a_fade_opacity;
+
+uniform bool u_is_size_zoom_constant;
+uniform bool u_is_size_feature_constant;
+uniform highp float u_size_t; // used to interpolate between zoom stops when size is a composite function
+uniform highp float u_size; // used when size is both zoom and feature constant
+uniform highp float u_camera_to_center_distance;
+uniform highp float u_pitch;
+uniform bool u_rotate_symbol;
+uniform highp float u_aspect_ratio;
+uniform float u_fade_change;
+
+
+#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
+
+
+uniform mat4 u_matrix;
+uniform mat4 u_label_plane_matrix;
+uniform mat4 u_gl_coord_matrix;
+
+uniform bool u_is_text;
+uniform bool u_pitch_with_map;
+
+uniform vec2 u_texsize;
+
+varying vec2 v_tex;
+varying float v_fade_opacity;
+
+void main() {
+    
+#ifndef HAS_UNIFORM_u_opacity
+    opacity = unpack_mix_vec2(a_opacity, a_opacity_t);
+#else
+    lowp float opacity = u_opacity;
+#endif
+
+
+    vec2 a_pos = a_pos_offset.xy;
+    vec2 a_offset = a_pos_offset.zw;
+
+    vec2 a_tex = a_data.xy;
+    vec2 a_size = a_data.zw;
+
+    highp float segment_angle = -a_projected_pos[2];
+
+    float size;
+    if (!u_is_size_zoom_constant && !u_is_size_feature_constant) {
+        size = mix(a_size[0], a_size[1], u_size_t) / 256.0;
+    } else if (u_is_size_zoom_constant && !u_is_size_feature_constant) {
+        size = a_size[0] / 256.0;
+    } else if (!u_is_size_zoom_constant && u_is_size_feature_constant) {
+        size = u_size;
+    } else {
+        size = u_size;
+    }
+
+    vec4 projectedPoint = u_matrix * vec4(a_pos, 0, 1);
+    highp float camera_to_anchor_distance = projectedPoint.w;
+    // See comments in symbol_sdf.vertex
+    highp float distance_ratio = u_pitch_with_map ?
+        camera_to_anchor_distance / u_camera_to_center_distance :
+        u_camera_to_center_distance / camera_to_anchor_distance;
+    highp float perspective_ratio = clamp(
+            0.5 + 0.5 * distance_ratio,
+            0.0, // Prevents oversized near-field symbols in pitched/overzoomed tiles
+            4.0);
+
+    size *= perspective_ratio;
+
+    float fontScale = u_is_text ? size / 24.0 : size;
+
+    highp float symbol_rotation = 0.0;
+    if (u_rotate_symbol) {
+        // See comments in symbol_sdf.vertex
+        vec4 offsetProjectedPoint = u_matrix * vec4(a_pos + vec2(1, 0), 0, 1);
+
+        vec2 a = projectedPoint.xy / projectedPoint.w;
+        vec2 b = offsetProjectedPoint.xy / offsetProjectedPoint.w;
+
+        symbol_rotation = atan((b.y - a.y) / u_aspect_ratio, b.x - a.x);
+    }
+
+    highp float angle_sin = sin(segment_angle + symbol_rotation);
+    highp float angle_cos = cos(segment_angle + symbol_rotation);
+    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 / 32.0 * fontScale), 0.0, 1.0);
+
+    v_tex = a_tex / u_texsize;
+    vec2 fade_opacity = unpack_opacity(a_fade_opacity);
+    float fade_change = fade_opacity[1] > 0.5 ? u_fade_change : -u_fade_change;
+    v_fade_opacity = max(0.0, min(1.0, fade_opacity[0] + fade_change));
+}
+
+*/
+
+// Uncompressed source of symbol_icon.fragment.glsl:
+/*
+uniform sampler2D u_texture;
+
+
+#ifndef HAS_UNIFORM_u_opacity
+varying lowp float opacity;
+#else
+uniform lowp float u_opacity;
+#endif
+
+
+varying vec2 v_tex;
+varying float v_fade_opacity;
+
+void main() {
+    
+#ifdef HAS_UNIFORM_u_opacity
+    lowp float opacity = u_opacity;
+#endif
+
+
+    lowp float alpha = opacity * v_fade_opacity;
+    gl_FragColor = texture2D(u_texture, v_tex) * alpha;
+
+#ifdef OVERDRAW_INSPECTOR
+    gl_FragColor = vec4(1.0);
+#endif
+}
+
+*/
+
 } // namespace shaders
 } // namespace mbgl