obs-filters: Apply GPU delay filter in linear space

plugins/obs-filters/gpu-delay.c

@@ -195,12 +195,22 @@ static void draw_frame(struct gpu_delay_filter_data *f)
 	gs_effect_t *effect = obs_get_base_effect(OBS_EFFECT_DEFAULT);
 	gs_texture_t *tex = gs_texrender_get_texture(frame.render);
 	if (tex) {
+		const bool linear_srgb = gs_get_linear_srgb();
+
+		const bool previous = gs_framebuffer_srgb_enabled();
+		gs_enable_framebuffer_srgb(linear_srgb);
+
 		gs_eparam_t *image =
 			gs_effect_get_param_by_name(effect, "image");
-		gs_effect_set_texture(image, tex);
+		if (linear_srgb)
+			gs_effect_set_texture_srgb(image, tex);
+		else
+			gs_effect_set_texture(image, tex);
 
 		while (gs_effect_loop(effect, "Draw"))
 			gs_draw_sprite(tex, 0, f->cx, f->cy);
+
+		gs_enable_framebuffer_srgb(previous);
 	}
 }