1 files changed, 110 insertions, 0 deletions
diff --git a/misc/proto/style.proto b/misc/proto/style.proto
new file mode 100644
index 0000000000..90e5b65061
--- /dev/null
+++ b/misc/proto/style.proto
@@ -0,0 +1,110 @@
+enum bucket_type {
+    fill = 1;
+    line = 2;
+    point = 3;
+
+    background = 15;
+}
+
+enum cap_type {
+    round_cap = 1;
+    butt_cap = 2;
+    square_cap = 3;
+}
+
+enum join_type {
+    miter_join = 1;
+    bevel_join = 2;
+    round_join = 3;
+}
+
+enum winding_type {
+    evenodd = 1;
+    nonzero = 2;
+}
+
+enum property_type {
+    null = 1;
+    constant = 2;
+    stops = 3;
+    linear = 4;
+}
+
+message value {
+    // Exactly one of these values may be present in a valid message
+    optional string string_value = 1;
+    optional float float_value = 2;
+    optional double double_value = 3;
+    optional int64 int_value = 4;
+    optional uint64 uint_value = 5;
+    optional sint64 sint_value = 6;
+    optional bool bool_value = 7;
+
+    extensions 8 to max;
+}
+
+message bucket {
+    required string name = 1;
+    required bucket_type type = 2;
+
+    // Specify what data to pull into this bucket
+    required string source_name = 3;
+    required string source_layer = 4;
+    optional string source_field = 5;
+    repeated value source_value = 6;
+
+    // Specifies how the geometry for this bucket should be created
+    optional cap_type cap = 7;
+    optional join_type join = 8;
+    optional string font = 9;
+    optional float font_size = 10;
+}
+
+message layer {
+    required string name = 1;
+    optional string bucket_name = 2;
+    repeated layer child_layer = 3;
+}
+
+message property {
+    required property_type function = 1;
+    repeated float value = 2 [ packed = true ];
+}
+
+message fill_style {
+    required string layer_name = 1;
+    optional property hidden = 2;
+    optional winding_type winding = 3 [ default = nonzero ];
+    optional property antialias = 4;
+    optional fixed32 fill_color = 5 [ default = 0x000000FF ]; // rgba (=> rgb << 8 | 0xFF for opaque!)
+    optional fixed32 stroke_color = 6; // if none is specified, no stroke will be painted
+    optional property opacity = 7; // values from 0..1
+    optional string image = 8;
+    // TODO: translate x/y
+}
+
+message stroke_style {
+    required string layer_name = 1;
+    optional property hidden = 2;
+    optional fixed32 color = 3 [ default = 0x000000FF ]; // rgba (=> rgb << 8 | 0xFF for opaque!)
+    optional property width = 4;
+    optional property offset = 5;
+    optional property opacity = 6; // values from 0..1
+    // line join + line cap are already defined in the
+    // TODO: dasharray
+    // TODO: image/icon
+    // TODO: translate x/y
+}
+
+message class {
+    required string name = 1;
+    repeated fill_style fill = 2;
+    repeated stroke_style stroke = 3;
+}
+
+// root level object
+message style {
+    repeated bucket bucket = 1;
+    repeated layer layer = 2;
+    repeated class class = 3;
+}