feat: finish ghostty pane backend integration

1 files changed, 60 insertions, 0 deletions

diff --git a/vendor/libghostty-vt/src/renderer/opengl/Target.zig b/vendor/libghostty-vt/src/renderer/opengl/Target.zig
new file mode 100644
index 00000000..5c6d818f
--- /dev/null
+++ b/vendor/libghostty-vt/src/renderer/opengl/Target.zig
@@ -0,0 +1,60 @@
+//! Represents a render target.
+//!
+//! In this case, an OpenGL renderbuffer-backed framebuffer.
+const Self = @This();
+
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const gl = @import("opengl");
+
+const log = std.log.scoped(.opengl);
+
+/// Options for initializing a Target
+pub const Options = struct {
+    /// Desired width
+    width: usize,
+    /// Desired height
+    height: usize,
+
+    /// Internal format for the renderbuffer.
+    internal_format: gl.Texture.InternalFormat,
+};
+
+/// The underlying `gl.Framebuffer` instance.
+framebuffer: gl.Framebuffer,
+
+/// The underlying `gl.Renderbuffer` instance.
+renderbuffer: gl.Renderbuffer,
+
+/// Current width of this target.
+width: usize,
+/// Current height of this target.
+height: usize,
+
+pub fn init(opts: Options) !Self {
+    const rbo = try gl.Renderbuffer.create();
+    const bound_rbo = try rbo.bind();
+    defer bound_rbo.unbind();
+    try bound_rbo.storage(
+        opts.internal_format,
+        @intCast(opts.width),
+        @intCast(opts.height),
+    );
+
+    const fbo = try gl.Framebuffer.create();
+    const bound_fbo = try fbo.bind(.framebuffer);
+    defer bound_fbo.unbind();
+    try bound_fbo.renderbuffer(.color0, rbo);
+
+    return .{
+        .framebuffer = fbo,
+        .renderbuffer = rbo,
+        .width = opts.width,
+        .height = opts.height,
+    };
+}
+
+pub fn deinit(self: *Self) void {
+    self.framebuffer.destroy();
+    self.renderbuffer.destroy();
+}