More or less finished flashlight code. The effect isn't 100% accurate

svn-id: r4007

1 files changed, 66 insertions, 0 deletions

diff --git a/gfx.cpp b/gfx.cpp
index 7e6d8d28be..e4c01f2602 100644
--- a/gfx.cpp
+++ b/gfx.cpp
@@ -2638,3 +2638,69 @@ void Scumm::drawBomp(BompDrawData * bd)
 
 CHECK_HEAP;
 }
+
+void Scumm::createSpecialPalette(int16 a, int16 b, int16 c, int16 d, int16 e, int16 colorMin, int16 colorMax)
+{
+	byte *palPtr;
+	byte *curPtr;
+	byte *searchPtr;
+
+	byte colorComp1;
+	byte colorComp2;
+	byte colorComp3;
+
+	byte searchComp1;
+	byte searchComp2;
+	byte searchComp3;
+
+	short int bestResult;
+	short int currentResult;
+	byte currentIndex;
+
+	int i;
+	int j;
+
+	palPtr = getPalettePtr();
+
+	for(i=colorMin;i<colorMax;i++)
+		_proc_special_palette[i]=i;
+
+	curPtr = palPtr + colorMin*3;
+
+	for(i=colorMin;i<colorMax;i++)
+	{
+	/*	colorComp1=((((*curPtr++)>>2)*c)>>8)&0x7F; 
+		colorComp2=((((*curPtr++)>>2)*d)>>8)&0x7F;
+		colorComp3=((((*curPtr++)>>2)*e)>>8)&0x7F;*/
+
+		/* Yazoo: I can't get the right formula, so I made one that just work fine with SamnMax flashlight */
+
+		colorComp1=(*curPtr++)+10;
+		colorComp2=(*curPtr++)+10;
+		colorComp3=(*curPtr++)+10;
+
+
+		searchPtr = palPtr;
+		bestResult = 0x7FFF;
+		currentIndex = 0;
+
+		for(j=0;j<256;j++)
+		{
+			searchComp1 = (*searchPtr++);
+			searchComp2 = (*searchPtr++);
+			searchComp3 = (*searchPtr++);
+
+			currentResult = abs(searchComp1-colorComp1) + abs(searchComp2-colorComp2) + abs(searchComp3-colorComp3);
+
+			if(currentResult<bestResult)
+				if(currentIndex >= a && currentIndex <= b)
+				{
+					_proc_special_palette[i]=currentIndex;
+					bestResult=currentResult;
+				}
+
+			currentIndex++;
+		}
+
+	}
+}
\ No newline at end of file