SCI32: Implement kPlayVMDIgnorePalettes

Used in Shivers room 35170 when pressing the play button.

2 files changed, 15 insertions, 1 deletions

diff --git a/engines/sci/graphics/video32.cpp b/engines/sci/graphics/video32.cpp
index 8e267f9144..bf0c990015 100644
--- a/engines/sci/graphics/video32.cpp
+++ b/engines/sci/graphics/video32.cpp
@@ -503,6 +503,7 @@ VMDPlayer::VMDPlayer(SegManager *segMan, EventManager *eventMan) :
 	_blackLines(false),
 	_leaveScreenBlack(false),
 	_leaveLastFrame(false),
+	_ignorePalettes(false),
 
 	_blackoutPlane(nullptr),
 
@@ -566,6 +567,7 @@ VMDPlayer::IOStatus VMDPlayer::close() {
 	_decoder->close();
 	_isOpen = false;
 	_isInitialized = false;
+	_ignorePalettes = false;
 
 	if (!_planeIsOwned && _screenItem != nullptr) {
 		g_sci->_gfxFrameout->deleteScreenItem(*_screenItem);
@@ -827,7 +829,7 @@ void VMDPlayer::renderFrame() const {
 	// we are just submitting it directly here because the decoder exposes
 	// this information a little bit differently than the one in SSCI
 	const bool dirtyPalette = _decoder->hasDirtyPalette();
-	if (dirtyPalette) {
+	if (dirtyPalette && !_ignorePalettes) {
 		Palette palette;
 		palette.timestamp = g_sci->getTickCount();
 		for (uint16 i = 0; i < _startColor; ++i) {
diff --git a/engines/sci/graphics/video32.h b/engines/sci/graphics/video32.h
index c3ae891c2e..4fc627e674 100644
--- a/engines/sci/graphics/video32.h
+++ b/engines/sci/graphics/video32.h
@@ -353,6 +353,13 @@ private:
 
 #pragma mark -
 #pragma mark VMDPlayer - Rendering
+public:
+	/**
+	 * Causes the VMD player to ignore all palettes in
+	 * the currently playing video.
+	 */
+	void ignorePalettes() { _ignorePalettes = true; }
+
 private:
 	/**
 	 * The location of the VMD plane, in game script
@@ -414,6 +421,11 @@ private:
 	bool _leaveLastFrame;
 
 	/**
+	 * Whether or not palettes from the VMD should be ignored.
+	 */
+	bool _ignorePalettes;
+
+	/**
 	 * Renders a frame of video to the output bitmap.
 	 */
 	void renderFrame() const;