[Scummvm-cvs-logs] SF.net SVN: scummvm:[40109] scummvm/trunk/engines/tinsel

[Hkz at users.sourceforge.net]

Revision: 40109
          http://scummvm.svn.sourceforge.net/scummvm/?rev=40109&view=rev
Author:   Hkz
Date:     2009-04-24 11:54:10 +0000 (Fri, 24 Apr 2009)

Log Message:
-----------
tinsel: added Discworld PSX palette converting function

Modified Paths:
--------------
    scummvm/trunk/engines/tinsel/palette.cpp
    scummvm/trunk/engines/tinsel/palette.h

Modified: scummvm/trunk/engines/tinsel/palette.cpp
===================================================================
--- scummvm/trunk/engines/tinsel/palette.cpp	2009-04-24 10:48:51 UTC (rev 40108)
+++ scummvm/trunk/engines/tinsel/palette.cpp	2009-04-24 11:54:10 UTC (rev 40109)
@@ -92,6 +92,33 @@
 #endif
 
 /**
+ * Convert Discworld PSX 555 CLUTs to compatible 888 palette
+ */
+COLORREF* psxClutToRGBPal(uint8 *srcClut) {
+	uint8 red, green, blue;
+	uint16 clutEntry;
+
+	// Allocate space for the 16 colour destination palette
+	COLORREF *dstPal = (COLORREF*)calloc(sizeof(COLORREF), MAX_COLOURS);
+	memset(dstPal, 0, MAX_COLOURS * sizeof(COLORREF));
+
+	for (int idx = 0; idx < 0x10; idx++) {
+		clutEntry = READ_LE_UINT16(srcClut); // Read PSX CLUT entry
+		srcClut += sizeof(uint16);
+		
+		// Extract color data
+		red = ((clutEntry & 0x1F) * 255) / 31;
+		green =  (((clutEntry & 0x3E0) >> 5) * 255) / 31;
+		blue = (((clutEntry & 0x7C00) >> 10) * 255) / 31;
+
+		// Write the palette
+		dstPal[idx] = TINSEL_RGB(red, green, blue);
+	}
+
+	return dstPal;
+}
+
+/**
  * Transfer palettes in the palette Q to Video DAC.
  */
 void PalettesToVideoDAC(void) {

Modified: scummvm/trunk/engines/tinsel/palette.h
===================================================================
--- scummvm/trunk/engines/tinsel/palette.h	2009-04-24 10:48:51 UTC (rev 40108)
+++ scummvm/trunk/engines/tinsel/palette.h	2009-04-24 11:54:10 UTC (rev 40109)
@@ -107,6 +107,8 @@
 void PaletteStats(void);	// Shows the maximum number of palettes used at once
 #endif
 
+COLORREF* psxClutToRGBPal(uint8 *srcClut); // Convert Discworld PSX 555 CLUTs to compatible 888 palette
+
 void PalettesToVideoDAC(void);	// Update the video DAC with palettes currently the the DAC queue
 
 void UpdateDACqueueHandle(


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