feat: finish ghostty pane backend integration

1 files changed, 104 insertions, 0 deletions

diff --git a/vendor/libghostty-vt/src/renderer/opengl/Texture.zig b/vendor/libghostty-vt/src/renderer/opengl/Texture.zig
new file mode 100644
index 00000000..c37ec686
--- /dev/null
+++ b/vendor/libghostty-vt/src/renderer/opengl/Texture.zig
@@ -0,0 +1,104 @@
+//! Wrapper for handling textures.
+const Self = @This();
+
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const gl = @import("opengl");
+
+const OpenGL = @import("../OpenGL.zig");
+
+const log = std.log.scoped(.opengl);
+
+/// Options for initializing a texture.
+pub const Options = struct {
+    format: gl.Texture.Format,
+    internal_format: gl.Texture.InternalFormat,
+    target: gl.Texture.Target,
+    min_filter: gl.Texture.MinFilter,
+    mag_filter: gl.Texture.MagFilter,
+    wrap_s: gl.Texture.Wrap,
+    wrap_t: gl.Texture.Wrap,
+};
+
+texture: gl.Texture,
+
+/// The width of this texture.
+width: usize,
+/// The height of this texture.
+height: usize,
+
+/// Format for this texture.
+format: gl.Texture.Format,
+
+/// Target for this texture.
+target: gl.Texture.Target,
+
+pub const Error = error{
+    /// An OpenGL API call failed.
+    OpenGLFailed,
+};
+
+/// Initialize a texture
+pub fn init(
+    opts: Options,
+    width: usize,
+    height: usize,
+    data: ?[]const u8,
+) Error!Self {
+    const tex = gl.Texture.create() catch return error.OpenGLFailed;
+    errdefer tex.destroy();
+    {
+        const texbind = tex.bind(opts.target) catch return error.OpenGLFailed;
+        defer texbind.unbind();
+        texbind.parameter(.WrapS, @intFromEnum(opts.wrap_s)) catch return error.OpenGLFailed;
+        texbind.parameter(.WrapT, @intFromEnum(opts.wrap_t)) catch return error.OpenGLFailed;
+        texbind.parameter(.MinFilter, @intFromEnum(opts.min_filter)) catch return error.OpenGLFailed;
+        texbind.parameter(.MagFilter, @intFromEnum(opts.mag_filter)) catch return error.OpenGLFailed;
+        texbind.image2D(
+            0,
+            opts.internal_format,
+            @intCast(width),
+            @intCast(height),
+            opts.format,
+            .UnsignedByte,
+            if (data) |d| @ptrCast(d.ptr) else null,
+        ) catch return error.OpenGLFailed;
+    }
+
+    return .{
+        .texture = tex,
+        .width = width,
+        .height = height,
+        .format = opts.format,
+        .target = opts.target,
+    };
+}
+
+pub fn deinit(self: Self) void {
+    self.texture.destroy();
+}
+
+/// Replace a region of the texture with the provided data.
+///
+/// Does NOT check the dimensions of the data to ensure correctness.
+pub fn replaceRegion(
+    self: Self,
+    x: usize,
+    y: usize,
+    width: usize,
+    height: usize,
+    data: []const u8,
+) Error!void {
+    const texbind = self.texture.bind(self.target) catch return error.OpenGLFailed;
+    defer texbind.unbind();
+    texbind.subImage2D(
+        0,
+        @intCast(x),
+        @intCast(y),
+        @intCast(width),
+        @intCast(height),
+        self.format,
+        .UnsignedByte,
+        data.ptr,
+    ) catch return error.OpenGLFailed;
+}