From d7d1fabb0abaa9514e50cee0e79bc4cee1dd1fe1 Mon Sep 17 00:00:00 2001
From: stevenhowes <38082088+stevenhowes@users.noreply.github.com>
Date: Sun, 27 Mar 2022 20:13:01 +0100
Subject: [PATCH] Q/Q2 PAK file support

---
 goretro.go    | 11 ++++++++++-
 utils_file.go | 24 +++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/goretro.go b/goretro.go
index ff4cee4..ac6382b 100644
--- a/goretro.go
+++ b/goretro.go
@@ -18,6 +18,7 @@ var Config struct {
 	DebugStatePrintSeconds float64
 
 	DataDir string
+	PakFile string
 }
 
 var Delta float64
@@ -33,7 +34,7 @@ func Init() (*sdl.Renderer, *sdl.Window) {
 		return nil, nil
 	}
 
-	fmt.Printf("%d x %d", Config.WindowSize.X, Config.WindowSize.Y)
+	fmt.Printf("Created window %d x %d\n", Config.WindowSize.X, Config.WindowSize.Y)
 
 	window, err := sdl.CreateWindow(
 		"GoEscape",
@@ -54,6 +55,14 @@ func Init() (*sdl.Renderer, *sdl.Window) {
 	TexList = make(map[string]*sdl.Texture)
 	FileList = make(map[string]*vFile)
 
+	if Config.PakFile != "" {
+		PakLoad(Config.PakFile)
+		if err != nil {
+			fmt.Println("loading pak ", Config.PakFile, err)
+			defer pak.PakClose()
+		}
+
+	}
 	LastDebugStatePrint = time.Now()
 
 	return renderer, window
diff --git a/utils_file.go b/utils_file.go
index 9a8bfc3..c983d42 100644
--- a/utils_file.go
+++ b/utils_file.go
@@ -11,6 +11,8 @@ package GoRetro
 import (
 	"fmt"
 	"os"
+
+	"github.com/stevenhowes/PakGo"
 )
 
 type vFile struct {
@@ -20,6 +22,21 @@ type vFile struct {
 
 var FileList map[string]*vFile
 
+var pak PakGo.PakFile
+
+func PakLoad(filename string) error {
+	var err error
+
+	fmt.Printf("Loading PAK %s\n", filename)
+
+	pak, err = PakGo.PakLoad(Config.DataDir + filename)
+	if err != nil {
+		panic(err)
+	}
+
+	return err
+}
+
 func GetFile(filename string) (*vFile, error) {
 	if val, ok := FileList[filename]; ok {
 		CacheHitsFile++
@@ -27,12 +44,17 @@ func GetFile(filename string) (*vFile, error) {
 	}
 
 	Data, err := os.ReadFile(Config.DataDir + filename)
+	if err != nil {
+		Data, err = pak.ReadFile(filename)
+	}
+
 	vf := vFile{
 		Size: len(Data),
 		Data: Data,
 	}
 
-	fmt.Printf("File Caching %s\n", filename)
+	fmt.Printf("File Caching %s at %d bytes\n", filename, len(Data))
+
 	FileList[filename] = &vf
 	return &vf, err
 }