From 919db23841c24475257182f6daddea59cefb408a Mon Sep 17 00:00:00 2001
From: Matthew Stewart
Date: Thu, 26 Jul 2018 00:18:32 -0400
Subject: STARTREK: Implement "BAN" files.

These are background animations in various rooms, purely visual.
---
 engines/startrek/graphics.cpp | 65 ++++++++++++++++++++++++++++++-------------
 1 file changed, 46 insertions(+), 19 deletions(-)

(limited to 'engines/startrek/graphics.cpp')

diff --git a/engines/startrek/graphics.cpp b/engines/startrek/graphics.cpp
index 6e8c97f902..43358f8c1c 100644
--- a/engines/startrek/graphics.cpp
+++ b/engines/startrek/graphics.cpp
@@ -109,6 +109,14 @@ byte *Graphics::getBackgroundPixels() {
 	return _backgroundImage->pixels;
 }
 
+byte *Graphics::lockScreenPixels() {
+	return (byte *)_vm->_system->lockScreen()->getPixels();
+}
+
+void Graphics::unlockScreenPixels() {
+	_vm->_system->unlockScreen();
+}
+
 void Graphics::clearScreenAndPriBuffer() {
 	Common::fill(_priData, _priData + sizeof(_priData), 0);
 
@@ -571,28 +579,24 @@ void Graphics::drawAllSprites(bool updateScreen) {
 
 	surface.free();
 
-	if (updateScreen) {
-		// Check if there are any pending updates to the mouse.
-		if (_mouseBitmap != _mouseBitmapLastFrame) {
-			_mouseBitmapLastFrame = _mouseBitmap;
-			_vm->_system->setMouseCursor(_mouseBitmap->pixels, _mouseBitmap->width, _mouseBitmap->height, _mouseBitmap->xoffset, _mouseBitmap->yoffset, 0);
-		}
-		if (_mouseToBeShown) {
-			CursorMan.showMouse(true);
-			_mouseToBeShown = false;
-		} else if (_mouseToBeHidden) {
-			CursorMan.showMouse(false);
-			_mouseToBeHidden = false;
-		}
+	if (updateScreen)
+		this->updateScreen();
+}
 
-		if (_mouseWarpX != -1) {
-			_vm->_system->warpMouse(_mouseWarpX, _mouseWarpY);
-			_mouseWarpX = -1;
-			_mouseWarpY = -1;
-		}
+void Graphics::drawAllSpritesInRect(const Common::Rect &rect) {
+	::Graphics::Surface *surface = _vm->_system->lockScreen();
+
+	for (int i = 0; i < _numSprites; i++) {
+		Sprite *sprite = _sprites[i];
+		if (!sprite->isOnScreen)
+			continue;
 
-		_vm->_system->updateScreen();
+		Common::Rect intersect = rect.findIntersectingRect(sprite->drawRect);
+		if (!intersect.isEmpty())
+			drawSprite(*sprite, surface, intersect);
 	}
+
+	_vm->_system->unlockScreen();
 }
 
 void Graphics::forceDrawAllSprites(bool updateScreen) {
@@ -601,6 +605,29 @@ void Graphics::forceDrawAllSprites(bool updateScreen) {
 	drawAllSprites(updateScreen);
 }
 
+void Graphics::updateScreen() {
+	// Check if there are any pending updates to the mouse.
+	if (_mouseBitmap != _mouseBitmapLastFrame) {
+		_mouseBitmapLastFrame = _mouseBitmap;
+		_vm->_system->setMouseCursor(_mouseBitmap->pixels, _mouseBitmap->width, _mouseBitmap->height, _mouseBitmap->xoffset, _mouseBitmap->yoffset, 0);
+	}
+	if (_mouseToBeShown) {
+		CursorMan.showMouse(true);
+		_mouseToBeShown = false;
+	} else if (_mouseToBeHidden) {
+		CursorMan.showMouse(false);
+		_mouseToBeHidden = false;
+	}
+
+	if (_mouseWarpX != -1) {
+		_vm->_system->warpMouse(_mouseWarpX, _mouseWarpY);
+		_mouseWarpX = -1;
+		_mouseWarpY = -1;
+	}
+
+	_vm->_system->updateScreen();
+}
+
 Sprite *Graphics::getSpriteAt(int16 x, int16 y) {
 	for (int i = _numSprites - 1; i >= 0; i--) {
 		Sprite *sprite = _sprites[i];
-- 
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