From 4ad485032c66cefb06e2949a95de17458d40407d Mon Sep 17 00:00:00 2001
From: Eugene Sandulenko <sev@scummvm.org>
Date: Tue, 30 Jul 2024 04:44:27 +0200
Subject: [PATCH] QDENGINE: Initial code for reading savegame thumbnails from
 ExtendedSave

---
 engines/qdengine/qdcore/qd_interface_save.cpp | 12 ++++---
 engines/qdengine/qdcore/qd_sprite.cpp         | 33 +++++++++++++++++++
 engines/qdengine/qdengine.h                   |  2 ++
 3 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/engines/qdengine/qdcore/qd_interface_save.cpp b/engines/qdengine/qdcore/qd_interface_save.cpp
index 7af5d466cb0..0542653af8d 100644
--- a/engines/qdengine/qdcore/qd_interface_save.cpp
+++ b/engines/qdengine/qdcore/qd_interface_save.cpp
@@ -165,15 +165,16 @@ bool qdInterfaceSave::init(bool is_game_active) {
 
 		ExtendedSavegameHeader header;
 
-		if (MetaEngine::readSavegameHeader(saveFile, &header, false))
+		if (MetaEngine::readSavegameHeader(saveFile, &header, true))
 			save_title_ =  header.description.c_str();
+
+		delete saveFile;
+
+		thumbnail_.set_animation_file(Common::String::format("save:%s", saveFileName.c_str()).c_str());
 	} else {
 		save_title_ = "";
 	}
 
-	if (app_io::is_file_exist(thumbnail_file()))
-		thumbnail_.set_animation_file(thumbnail_file().c_str());
-
 	set_state(&frame_);
 
 	if (!save_mode_ && !fileExists) {
@@ -338,6 +339,9 @@ bool qdInterfaceSave::load_script_body(const xml::tag *p) {
 			break;
 		case QDSCR_INTERFACE_THUMBNAIL_SIZE:
 			xml::tag_buffer(*it) > thumbnail_size_x_ > thumbnail_size_y_;
+
+			g_engine->_thumbSizeX = thumbnail_size_x_;
+			g_engine->_thumbSizeY = thumbnail_size_y_;
 			break;
 		case QDSCR_INTERFACE_TEXT_SHIFT:
 			xml::tag_buffer(*it) > text_dx_ > text_dy_;
diff --git a/engines/qdengine/qdcore/qd_sprite.cpp b/engines/qdengine/qdcore/qd_sprite.cpp
index 20e721faf74..294e613e068 100644
--- a/engines/qdengine/qdcore/qd_sprite.cpp
+++ b/engines/qdengine/qdcore/qd_sprite.cpp
@@ -22,6 +22,10 @@
 #define FORBIDDEN_SYMBOL_ALLOW_ALL
 #include "common/debug.h"
 #include "common/file.h"
+#include "common/savefile.h"
+
+#include "engines/metaengine.h"
+#include "graphics/surface.h"
 
 #include "qdengine/qdengine.h"
 #include "qdengine/qd_precomp.h"
@@ -202,6 +206,35 @@ bool qdSprite::load(const char *fname) {
 	Common::SeekableReadStream *fh;
 	Common::Path fpath(_file.c_str(), '\\');
 
+	if (!strncmp(_file.c_str(), "save:", 5)) {
+		Common::InSaveFile *saveFile = g_engine->getSaveFileManager()->openForLoading(&_file.c_str()[5]);
+
+		ExtendedSavegameHeader saveHeader;
+		if (MetaEngine::readSavegameHeader(saveFile, &saveHeader, true)) {
+			_size = _picture_size = Vect2i(qdGameConfig::get_config().screen_sx(), qdGameConfig::get_config().screen_sy());
+			_picture_offset = Vect2i(0, 0);
+
+			_format = GR_RGB565;
+
+			_data = new unsigned char[_size.x * _size.y * 2];
+
+			for (int i = 0; i < _size.y; i++) {
+				uint16 *src = (uint16 *)saveHeader.thumbnail->getBasePtr(0, i);
+				uint16 *dst = (uint16 *)&_data[2 * _size.x * i];
+				for (int j = 0; j < _size.x; j++) {
+					*dst++ = *src++;
+				}
+			}
+
+			scale(static_cast<float>(g_engine->_thumbSizeX) / _size.x,
+				  static_cast<float>(g_engine->_thumbSizeY) / _size.y);
+		}
+
+		delete saveFile;
+
+		return true;
+	}
+
 	if (!qdFileManager::instance().open_file(&fh, fpath.toString().c_str())) {
 		return false;
 	}
diff --git a/engines/qdengine/qdengine.h b/engines/qdengine/qdengine.h
index ee50c489e6d..bb11da3aab9 100644
--- a/engines/qdengine/qdengine.h
+++ b/engines/qdengine/qdengine.h
@@ -101,6 +101,8 @@ public:
 
 	Common::Error saveGameStream(Common::WriteStream *stream, bool isAutosave = false) override;
 	Common::Error loadGameStream(Common::SeekableReadStream *stream) override;
+
+	int _thumbSizeX = 0, _thumbSizeY = 0;
 };
 
 extern QDEngineEngine *g_engine;