PRINCE: getBlendTableColor(), drawTransparentWithBlend()

4 files changed, 133 insertions, 7 deletions

diff --git a/engines/prince/graphics.cpp b/engines/prince/graphics.cpp
index 49cc88c8ae..298337673f 100644
--- a/engines/prince/graphics.cpp
+++ b/engines/prince/graphics.cpp
@@ -24,6 +24,8 @@
 
 #include "prince/prince.h"
 
+#include "prince/mhwanh.h"
+
 #include "graphics/palette.h"
 
 #include "common/memstream.h"
@@ -89,6 +91,29 @@ void GraphicsMan::drawTransparentSurface(int32 posX, int32 posY, const Graphics:
 	change();
 }
 
+void GraphicsMan::drawTransparentWithBlend(int32 posX, int32 posY, const Graphics::Surface *s, int transColor) {
+	_blendTable = new byte[256];
+	for (int i = 0; i < 256; i++) {
+		_blendTable[i] = 255;
+	}
+	for (int y = 0; y < s->h; y++) {
+		for (int x = 0; x < s->w; x++) {
+			byte pixel = *((byte*)s->getBasePtr(x, y));
+			if (pixel != transColor) {
+				if (x + posX < _frontScreen->w && x + posX >= 0) {
+					if (y + posY < _frontScreen->h && y + posY >= 0) {
+						byte backgroundPixel = *((byte*)_frontScreen->getBasePtr(x + posX, y + posY));
+						byte blendPixel = getBlendTableColor(pixel, backgroundPixel);
+						*((byte*)_frontScreen->getBasePtr(x + posX, y + posY)) = blendPixel;
+					}
+				}
+			}
+		}
+	}
+	delete _blendTable;
+	change();
+}
+
 void GraphicsMan::drawTransparent(Graphics::Surface *frontScreen, DrawNode *drawNode) {
 	for (int y = 0; y < drawNode->s->h; y++) {
 		for (int x = 0; x < drawNode->s->w; x++) {
@@ -147,6 +172,103 @@ void GraphicsMan::drawAsShadow(Graphics::Surface *frontScreen, DrawNode *drawNod
 	}
 }
 
+byte GraphicsMan::getBlendTableColor(byte pixelColor, byte backgroundPixelColor) {
+	int32 redFirstOrg, greenFirstOrg, blueFirstOrg;
+	int32 redFirstBack, greenFirstBack, blueFirstBack;
+	int32 redSecondOrg, greenSecondOrg, blueSecondOrg;
+	int32 redNew, greenNew, blueNew;
+
+	int32 sumOfColorValues;
+	int32 bigValue;
+	int32 currColor;
+
+	if (_blendTable[pixelColor] != 255) {
+		currColor = _blendTable[pixelColor];
+	} else {
+		const byte *originalPalette = _vm->_roomBmp->getPalette(); //?
+		const byte *suitcasePalette = _vm->_suitcaseBmp->getPalette(); //?
+
+		//debug("backgroundPixelColor: %d", backgroundPixelColor);
+		//debug("orgpalette: %d", pixelColor);
+		//debug("mst_shadow: %d",  _vm->_mst_shadow);
+
+		redFirstOrg = originalPalette[pixelColor * 4] * _vm->_mst_shadow / 256;
+		if (redFirstOrg >= 256) {
+			redFirstOrg = 255;
+		}
+		if (_vm->_mst_shadow <= 256) {
+			redFirstBack = suitcasePalette[backgroundPixelColor * 4] * (256 - _vm->_mst_shadow) / 256;
+			if (redFirstBack >= 256) {
+				redFirstBack = 255;
+			}
+			redFirstOrg += redFirstBack;
+			if (redFirstOrg >= 256) {
+				redFirstOrg = 255;
+			}
+		}
+
+		greenFirstOrg = originalPalette[pixelColor * 4 + 1] * _vm->_mst_shadow / 256;
+		if (greenFirstOrg >= 256) {
+			greenFirstOrg = 255;
+		}
+		if (_vm->_mst_shadow <= 256) {
+			greenFirstBack = suitcasePalette[backgroundPixelColor * 4 + 1] * (256 - _vm->_mst_shadow) / 256;
+			if (greenFirstBack >= 256) {
+				greenFirstBack = 255;
+			}
+			greenFirstOrg += greenFirstBack;
+			if (greenFirstOrg >= 256) {
+				greenFirstOrg = 255;
+			}
+		}
+
+		blueFirstOrg = originalPalette[pixelColor * 4 + 2] * _vm->_mst_shadow / 256;
+		if (blueFirstOrg >= 256) {
+			blueFirstOrg = 255;
+		}
+		if (_vm->_mst_shadow <= 256) {
+			blueFirstBack = suitcasePalette[backgroundPixelColor * 4 + 2] * (256 - _vm->_mst_shadow) / 256;
+			if (blueFirstBack >= 256) {
+				blueFirstBack = 255;
+			}
+			blueFirstOrg += blueFirstBack;
+			if (blueFirstOrg >= 256) {
+				blueFirstOrg = 255;
+			}
+		}
+
+		currColor = 0;
+		bigValue = 999999999; // infinity
+		for (int j = 0; j < 256; j++) {
+			redSecondOrg = originalPalette[3 * j];
+			redNew = redFirstOrg - redSecondOrg;
+			redNew = redNew * redNew;
+
+			greenSecondOrg = originalPalette[3 * j + 1];
+			greenNew = greenFirstOrg - greenSecondOrg;
+			greenNew = greenNew * greenNew;
+
+			blueSecondOrg = originalPalette[3 * j + 2];
+			blueNew = blueFirstOrg - blueSecondOrg;
+			blueNew = blueNew * blueNew;
+
+			sumOfColorValues = redNew + greenNew + blueNew;
+
+			if (sumOfColorValues < bigValue) {
+				bigValue = sumOfColorValues;
+				currColor = j;
+			}
+
+			if (sumOfColorValues == 0) {
+				break;
+			}
+		}
+		_blendTable[pixelColor] = currColor;
+	}
+	//debug("currColor: %d", currColor);
+	return currColor;
+}
+
 void GraphicsMan::makeShadowTable(int brightness, byte *shadowPalette) {
 	int32 redFirstOrg, greenFirstOrg, blueFirstOrg;
 	int32 redSecondOrg, greenSecondOrg, blueSecondOrg;
diff --git a/engines/prince/graphics.h b/engines/prince/graphics.h
index cd3d8b4f35..7651dae7a1 100644
--- a/engines/prince/graphics.h
+++ b/engines/prince/graphics.h
@@ -30,6 +30,7 @@ namespace Prince {
 
 class PrinceEngine;
 struct DrawNode;
+class MhwanhDecoder;
 
 class GraphicsMan
 {
@@ -46,11 +47,14 @@ public:
 
 	void draw(uint16 x, uint16 y, const Graphics::Surface *s);
 	void drawTransparentSurface(int32 posX, int32 poxY, const Graphics::Surface *s, int transColor);
+	void drawTransparentWithBlend(int32 posX, int32 poxY, const Graphics::Surface *s, int transColor);
 
 	static void drawTransparent(Graphics::Surface *frontScreen, DrawNode *drawNode);
 	static void drawAsShadow(Graphics::Surface *frontScreen, DrawNode *drawNode);
 	static void drawMask(Graphics::Surface *frontScreen, DrawNode *drawNode);
 
+	byte getBlendTableColor(byte pixelColor, byte backgroundPixelColor);
+
 	Graphics::Surface *_frontScreen;
 	Graphics::Surface *_backScreen;
 	const Graphics::Surface *_roomBackground;
@@ -60,6 +64,8 @@ public:
 
 	static const byte kShadowColor = 191;
 
+	byte *_blendTable;
+
 private:
 
 	PrinceEngine *_vm;
diff --git a/engines/prince/prince.cpp b/engines/prince/prince.cpp
index 7a716fd98a..a0405c76db 100644
--- a/engines/prince/prince.cpp
+++ b/engines/prince/prince.cpp
@@ -1398,9 +1398,10 @@ void PrinceEngine::drawInvItems() {
 						drawY += (_maxInvH - itemSurface->h) / 2;
 					}
 					if (!_mst_shadow) {
-						_graph->drawTransparentSurface(drawX, drawY, itemSurface, 0); //TODO - ShowSprite0
+						_graph->drawTransparentSurface(drawX, drawY, itemSurface, 0);
 					} else {
-						_graph->drawTransparentSurface(drawX, drawY, itemSurface, 0); //TODO - ShowSprite01
+						_mst_shadow = _mst_shadow2;
+						_graph->drawTransparentWithBlend(drawX, drawY, itemSurface, 0); //TODO - ShowSprite01
 					}
 				} else {
 					// candle item:
@@ -1418,11 +1419,8 @@ void PrinceEngine::displayInventory() {
 	// temp:
 	_mainHero->_inventory.clear();
 	_mainHero->_inventory.push_back(0);
-	_mainHero->_inventory.push_back(1);
 	_mainHero->_inventory.push_back(2);
-	_mainHero->_inventory.push_back(3);
-	_mainHero->_inventory.push_back(4);
-	_mainHero->_inventory.push_back(5);
+	_mainHero->_inventory.push_back(1);
 
 	prepareInventoryToView();
 
diff --git a/engines/prince/prince.h b/engines/prince/prince.h
index 1694286f54..71512f0d8a 100644
--- a/engines/prince/prince.h
+++ b/engines/prince/prince.h
@@ -254,6 +254,7 @@ public:
 	int32 _picWindowX;
 	int32 _picWindowY;
 	Image::BitmapDecoder *_roomBmp;
+	MhwanhDecoder *_suitcaseBmp;
 
 	Common::Array<AnimListItem> _animList;
 	Common::Array<BackgroundAnim> _backAnimList;
@@ -330,7 +331,6 @@ private:
 	Common::RandomSource *_rnd;
 	Cursor *_cursor1;
 	Cursor *_cursor2;
-	MhwanhDecoder *_suitcaseBmp;
 	Debugger *_debugger;
 	GraphicsMan *_graph;
 	Script *_script;