From e8d4c2fdeb0559ec406902e834969b7b3a6a80c3 Mon Sep 17 00:00:00 2001
From: Jaby <Jaby>
Date: Tue, 27 Dec 2022 22:06:14 +0100
Subject: [PATCH] Setup LZ4 decompressor but have it copy data for now

---
 include/PSX/Auxiliary/lz4_decompressor.hpp    |  3 ++
 .../src/Auxiliary/lz4_decompressor.cpp        |  3 ++
 src/Library/src/BootLoader/gpu_boot.cpp       | 29 +++++++++++++++++--
 3 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/include/PSX/Auxiliary/lz4_decompressor.hpp b/include/PSX/Auxiliary/lz4_decompressor.hpp
index 48583ba7..07d5c1f7 100644
--- a/include/PSX/Auxiliary/lz4_decompressor.hpp
+++ b/include/PSX/Auxiliary/lz4_decompressor.hpp
@@ -21,6 +21,9 @@ namespace JabyEngine {
 
     public:
         LZ4Decompressor() = default;
+        LZ4Decompressor(uint8_t* dst_adr) : LZ4Decompressor() {
+            LZ4Decompressor::setup(dst_adr);
+        }
 
         void setup(uint8_t* dst_adr);
         void reset();
diff --git a/src/Library/src/Auxiliary/lz4_decompressor.cpp b/src/Library/src/Auxiliary/lz4_decompressor.cpp
index b10bb092..f2069eb8 100644
--- a/src/Library/src/Auxiliary/lz4_decompressor.cpp
+++ b/src/Library/src/Auxiliary/lz4_decompressor.cpp
@@ -11,6 +11,9 @@ namespace JabyEngine {
     }
 
     Progress LZ4Decompressor :: process(const uint8_t* data, size_t size) {
+        for(size_t n = 0; n < size; n++) {
+            this->dst_adr[n] = data[n];
+        }
         return Progress::Error;
     }
 }
\ No newline at end of file
diff --git a/src/Library/src/BootLoader/gpu_boot.cpp b/src/Library/src/BootLoader/gpu_boot.cpp
index 24424ddf..655a8992 100644
--- a/src/Library/src/BootLoader/gpu_boot.cpp
+++ b/src/Library/src/BootLoader/gpu_boot.cpp
@@ -1,6 +1,8 @@
 #include "../../include/GPU/gpu.hpp"
 #include <PSX/File/Processor/file_processor.hpp>
+#include <PSX/Auxiliary/lz4_decompressor.hpp>
 #include <PSX/GPU/gpu.hpp>
+#include <stdio.h>
 
 #ifdef JABYENGINE_PAL
     #include "splash_image_pal_boot.hpp"
@@ -8,11 +10,34 @@
     #include "splash_image_ntsc_boot.hpp"
 #endif //JABYENGINE_PAL
 
+extern "C" uint32_t __boot_loader_end;
+
 namespace JabyEngine {
-    namespace GPU {    
+    namespace GPU {
+        static void decompress_logo() {
+            LZ4Decompressor lz4_decomp(reinterpret_cast<uint8_t*>(&__boot_loader_end));
+
+            switch(lz4_decomp.process(SplashScreen, sizeof(SplashScreen))) {
+                case Progress::InProgress:
+                    printf("Decompressing still in progress...\n");
+                    break;
+
+                case Progress::Error:
+                    printf("Error decompressing!!!\n");
+                    break;
+
+                case Progress::Done:
+                    printf("Done decompressing\n");
+                    break;
+            }
+        }
+
         void display_logo() {
+            decompress_logo();
+
             // Upload SplashScreen picture
-            auto state = FileProcessor::create(reinterpret_cast<const uint32_t*>(SplashScreen), SimpleTIM(32, 0, 0, 0));
+            auto state = FileProcessor::create(&__boot_loader_end, SimpleTIM(32, 0, 0, 0));
+            //                   v this will not be correct for now...
             while(state.process((sizeof(SplashScreen)/sizeof(uint32_t))) == Progress::InProgress);
 
             Display::enable();