add imagemagick linking

README.md

@@ -13,7 +13,9 @@ glitch art "framework", ???????? language??? something?
  - zig at https://ziglang.org
  - libc, lilv and libsndfile
  - an appreciation for glitched anime girls on your hard drive
- - optional: imagemagick to convert from whatever to bmp
+ - imagemagick for
+   - running the `rotate` command
+   - optional manual step: convert from whatever to bmp
 
 ## plugin depedencies:
  - lv2 default plugins (most specifically the eg-amp plugin)

build.zig

@@ -10,7 +10,17 @@ pub fn build(b: *Builder) void {
     exe.linkSystemLibrary("sndfile");
     exe.linkSystemLibrary("c");
 
+    // magick libraries
+    exe.linkSystemLibrary("MagickWand-7.Q16HDRI");
+    exe.linkSystemLibrary("MagickCore-7.Q16HDRI");
+
+    //exe.addArgs([_]u8{
+    //    "-DMAGICKCORE_HDRI_ENABLE=1",
+    //    "-DMAGICKCORE_QUANTUM_DEPTH=16",
+    //});
+
     exe.addIncludeDir("/usr/include/lilv-0");
+    exe.addIncludeDir("/usr/include/ImageMagick-7");
 
     const run_cmd = exe.run();
     run_cmd.step.dependOn(b.getInstallStep());

src/magick.zig

@@ -0,0 +1,9 @@
+// imagemagick plugins
+const std = @import("std");
+const images = @import("image.zig");
+
+const Image = images.Image;
+
+pub fn runRotate(image: *Image) !void {
+    return error.NotImplementedYet;
+}

src/runner.zig

@@ -3,6 +3,7 @@ const lang = @import("lang.zig");
 const images = @import("image.zig");
 const plugin = @import("plugin.zig");
 const custom = @import("custom.zig");
+const magick = @import("magick.zig");
 
 const Position = plugin.Position;
 const ParamList = plugin.ParamList;
@@ -257,6 +258,11 @@ pub const Runner = struct {
         try image.runCustomPlugin(custom.WildNoise, pos, map);
     }
 
+    fn rotateCmd(self: *Runner) !void {
+        var image = try self.getImage();
+        try magick.runRotate(image);
+    }
+
     fn runCommand(self: *Runner, cmd: *lang.Command) !void {
         var params = ParamList.init(self.allocator);
         defer params.deinit();
@@ -418,6 +424,8 @@ pub const Runner = struct {
                 try self.wildNoiseCmd(pos, &map);
             },
 
+            .Rotate => try self.rotateCmd(),
+
             else => blk: {
                 std.debug.warn("Unsupported command: {}\n", cmd.command);
                 break :blk RunError.UnknownCommand;