From 4b53b4f1aa1578a9fe5da34d86968856b5b4eef8 Mon Sep 17 00:00:00 2001
From: Walter Agazzi <walter.agazzi@protonmail.com>
Date: Wed, 8 Feb 2023 21:38:04 +0100
Subject: [PATCH] GUI: Darken thumbnails of invalid entries

Applies a dark transparent overlay to the
games that are non-startable
---
 gui/widgets/grid.cpp | 30 +++++++++++++++++++++++++++++-
 gui/widgets/grid.h   |  3 ++-
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/gui/widgets/grid.cpp b/gui/widgets/grid.cpp
index 77efe1d89b9..91031f12be7 100644
--- a/gui/widgets/grid.cpp
+++ b/gui/widgets/grid.cpp
@@ -145,6 +145,17 @@ void GridItemWidget::drawWidget() {
 		g_gui.theme()->drawSurface(p, *demoGfx, true);
 	}
 
+	bool validEntry = _activeEntry->validEntry;
+
+	// Darken thumbnail if path is unreachable
+	if (!validEntry) {
+		const Graphics::ManagedSurface *darkenGfx = _grid->disabledThumbnail();
+		if (darkenGfx) {
+			Common::Point p(_x, _y);
+			g_gui.theme()->drawSurface(p, *darkenGfx, true);
+		}
+	}
+
 	// Draw Title
 	if (_grid->_isTitlesVisible) {
 		// TODO: Currently title is fixed to two lines at all times, we may want
@@ -156,7 +167,7 @@ void GridItemWidget::drawWidget() {
 		}
 		// Display text in alternate color if the path is unreachable
 		// Should be ok using kStateDisabled, but the list widget uses FontColorAlternate so let's stick to that
-		GUI::ThemeEngine::FontColor color = _activeEntry->validEntry ? GUI::ThemeEngine::kFontColorNormal : GUI::ThemeEngine::kFontColorAlternate;
+		GUI::ThemeEngine::FontColor color = validEntry ? GUI::ThemeEngine::kFontColorNormal : GUI::ThemeEngine::kFontColorAlternate;
 		Common::Rect r(_x, _y + thumbHeight, _x + thumbWidth, _y + thumbHeight + kLineHeight);
 		for (uint k = 0; k < MIN(2U, titleLines.size()); ++k) {
 			g_gui.theme()->drawText(r, titleLines[k], GUI::ThemeEngine::kStateEnabled, Graphics::kTextAlignCenter, GUI::ThemeEngine::kTextInversionNone,
@@ -354,6 +365,8 @@ GridWidget::GridWidget(GuiObject *boss, const Common::String &name)
 	_platformIconWidth = 0;
 	_extraIconHeight = 0;
 	_extraIconWidth = 0;
+	_disabledIconOverlay = nullptr;
+
 	_minGridXSpacing = 0;
 	_minGridYSpacing = 0;
 	_isTitlesVisible = 0;
@@ -392,6 +405,7 @@ GridWidget::~GridWidget() {
 	unloadSurfaces(_languageIcons);
 	unloadSurfaces(_extraIcons);
 	unloadSurfaces(_loadedSurfaces);
+	delete _disabledIconOverlay;
 	_gridItems.clear();
 	_dataEntryList.clear();
 	_headerEntryList.clear();
@@ -431,6 +445,10 @@ const Graphics::ManagedSurface *GridWidget::demoToSurface(const Common::String e
 	return _extraIcons[0];
 }
 
+const Graphics::ManagedSurface *GridWidget::disabledThumbnail() {
+	return _disabledIconOverlay;
+}
+
 void GridWidget::setEntryList(Common::Array<GridItemInfo> *list) {
 	_dataEntryList.clear();
 	_headerEntryList.clear();
@@ -952,10 +970,20 @@ void GridWidget::reflowLayout() {
 		unloadSurfaces(_platformIcons);
 		unloadSurfaces(_languageIcons);
 		unloadSurfaces(_loadedSurfaces);
+		if (_disabledIconOverlay)
+			_disabledIconOverlay->free();
 		reloadThumbnails();
 		loadFlagIcons();
 		loadPlatformIcons();
 		loadExtraIcons();
+
+		Graphics::ManagedSurface *gfx = new Graphics::ManagedSurface(_thumbnailWidth, _thumbnailHeight, g_system->getOverlayFormat());
+		uint32 disabledThumbnailColor = gfx->format.ARGBToColor(153, 0, 0, 0);  // 60% opacity black
+		gfx->fillRect(Common::Rect(0, 0, _thumbnailWidth, _thumbnailHeight), disabledThumbnailColor);
+		if (gfx)
+			_disabledIconOverlay = gfx;
+		else
+			_disabledIconOverlay = nullptr;
 	}
 
 	_trayHeight = kLineHeight * 3;
diff --git a/gui/widgets/grid.h b/gui/widgets/grid.h
index 087e32d482c..98d47339a8a 100644
--- a/gui/widgets/grid.h
+++ b/gui/widgets/grid.h
@@ -101,7 +101,7 @@ protected:
 	Common::HashMap<int, const Graphics::ManagedSurface *> _platformIcons;
 	Common::HashMap<int, const Graphics::ManagedSurface *> _languageIcons;
 	Common::HashMap<int, const Graphics::ManagedSurface *> _extraIcons;
-
+	Graphics::ManagedSurface *_disabledIconOverlay;
 	// Images are mapped by filename -> surface.
 	Common::HashMap<Common::String, const Graphics::ManagedSurface *> _loadedSurfaces;
 
@@ -174,6 +174,7 @@ public:
 	const Graphics::ManagedSurface *languageToSurface(Common::Language languageCode);
 	const Graphics::ManagedSurface *platformToSurface(Common::Platform platformCode);
 	const Graphics::ManagedSurface *demoToSurface(const Common::String extraString);
+	const Graphics::ManagedSurface *disabledThumbnail();
 
 	/// Update _visibleEntries from _allEntries and returns true if reload is required.
 	bool calcVisibleEntries();