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freebsd-ports/emulators/snes9x/files/patch-ac
Brian Feldman 39117e5532 Add 2xSaI mode to Snes9X for Unix (X11); using the switch -2xsai, this 
is a "smarter" stretcher and interpolater by Kreed.  It looks better
than the -y TV mode :)
2000-11-22 03:18:13 +00:00

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--- unix/x11.cpp.orig Fri Oct 6 17:02:40 2000
+++ unix/x11.cpp Tue Nov 21 21:58:20 2000
@@ -136,7 +136,7 @@
static XColor colors [256];
static bool8 pseudo = TRUE;
static bool8 grayscale = FALSE;
-static bool8 interpolate = FALSE;
+static int interpolate = 0; /* 0 = none, 1 = TVMode, 2 = 2xSaI */
static bool8 ImageNeedsScaling = FALSE;
static int depth = 8;
static int window_width = SNES_WIDTH;
@@ -189,6 +189,7 @@
void SetupImage ();
int ErrorHandler (Display *, XErrorEvent *);
void TVMode (int width, int height);
+void _2xSaIBitmap (int width, int height);
void S9xDisplayStateChange (const char *str, bool8 on);
void S9xDeinitDisplay ()
@@ -1336,7 +1337,10 @@
{
memset (DeltaScreen, 255, GFX.Pitch * snes_height);
}
- TVMode (snes_width, snes_height);
+ if (interpolate == 1)
+ TVMode (snes_width, snes_height);
+ else
+ _2xSaIBitmap (snes_width, snes_height);
width = 512;
if (snes_height < 240)
height = snes_height << 1;
@@ -2196,7 +2200,15 @@
Settings.SixteenBit = TRUE;
Settings.SupportHiRes = TRUE;
Settings.ForceTransparency = TRUE;
- interpolate = TRUE;
+ interpolate = 1;
+ }
+ else
+ if (strcasecmp (argv [ind], "-2xsai") == 0)
+ {
+ Settings.SixteenBit = TRUE;
+ Settings.SupportHiRes = TRUE;
+ Settings.ForceTransparency = TRUE;
+ interpolate = 2;
}
#ifdef USE_DGA_EXTENSION
else
@@ -2373,6 +2385,318 @@
while (--height);
}
}
+
+/*---------------------------------------------------------------------*
+ * The following (piece of) code, (part of) the 2xSaI engine, *
+ * copyright (c) 1999 by Derek Liauw Kie Fa. *
+ * Non-Commercial use of the engine is allowed and is encouraged, *
+ * provided that appropriate credit be given and that this copyright *
+ * notice will not be removed under any circumstance. *
+ * You may freely modify this code, but I request *
+ * that any improvements to the engine be submitted to me, so *
+ * that I can implement these improvements in newer versions of *
+ * the engine. *
+ * If you need more information, have any comments or suggestions, *
+ * you can e-mail me. My e-mail: derek-liauw@usa.net. *
+ *---------------------------------------------------------------------*/
+
+/*---------------------*/
+/* 2xSaI, version 0.50 */
+/*---------------------*/
+
+inline int GetResult1(uint32 A, uint32 B, uint32 C, uint32 D, uint32 E)
+{
+ int x = 0;
+ int y = 0;
+ int r = 0;
+ if (A == C) x+=1; else if (B == C) y+=1;
+ if (A == D) x+=1; else if (B == D) y+=1;
+ if (x <= 1) r+=1;
+ if (y <= 1) r-=1;
+ return r;
+}
+
+inline int GetResult2(uint32 A, uint32 B, uint32 C, uint32 D, uint32 E)
+{
+ int x = 0;
+ int y = 0;
+ int r = 0;
+ if (A == C) x+=1; else if (B == C) y+=1;
+ if (A == D) x+=1; else if (B == D) y+=1;
+ if (x <= 1) r-=1;
+ if (y <= 1) r+=1;
+ return r;
+}
+
+inline uint32 RowSharpen (uint32 A, uint32 B, uint32 C)
+{
+ if (B != C || A != C)
+ {
+ register int32 GREEN_MASK = 0x07E007E0;
+ register int32 x = (B & GREEN_MASK) >> 5;
+ register int32 y = ((A & GREEN_MASK) +
+ (C & GREEN_MASK) >> 7);
+ x = x + (x>>1) - (y);
+ if (x < 0) x = 0;
+ else if (x > 63) x = 63;
+ GREEN_MASK = ~GREEN_MASK;
+ return ((B & GREEN_MASK) | (x << 5));
+ }
+ else return B;
+}
+
+inline uint32 INTERPOLATE(uint32 A, uint32 B)
+{
+ if (A !=B)
+ {
+ register uint32 colorMask = 0xF7DEF7DE;
+ register uint32 lowPixelMask = 0x08210821;
+ return ( ((A & colorMask) >> 1) + ((B & colorMask) >> 1) + (A & B & lowPixelMask) );
+ }
+ else return A;
+}
+
+
+inline uint32 Q_INTERPOLATE(uint32 A, uint32 B, uint32 C, uint32 D)
+{
+ register uint32 qcolorMask = 0xE79CE79C;
+ register uint32 qlowpixelMask = 0x18631863;
+ register uint32 x = ((A & qcolorMask) >> 2) +
+ ((B & qcolorMask) >> 2) +
+ ((C & qcolorMask) >> 2) +
+ ((D & qcolorMask) >> 2);
+ register uint32 y = (A & qlowpixelMask) +
+ (B & qlowpixelMask) +
+ (C & qlowpixelMask) +
+ (D & qlowpixelMask);
+ y = (y>>2) & qlowpixelMask;
+ return x+y;
+}
+
+#ifdef MMX
+EXTERN_C void __2xSaILine (uint8 *srcPtr, uint32 srcPitch, uint32 width,
+ uint8* dstPtr, uint32 dstPitch);
+EXTERN_C void __2xSaISuperEagleLine (uint8 *srcPtr, uint32 srcPitch,
+ uint32 width, uint8* dstPtr, uint32 dstPitch);
+int mmx_cpu;
+#endif
+
+void _2xSaIBitmap(int width, int height)
+{
+ uint8 *srcPtr, *dstPtr;
+ //srcPtr = pointer to the beginning of the source bitmap
+ //dstPtr = pointer to the beginning of the destination bitmap
+ uint32 dstPitch = OutputPitch;
+ uint32 *dP; //pointer to the pixels we are writing
+ uint16 *bP; //pointer to the pixels we are reading
+
+ srcPtr = GFX.Screen; //How many bytes to the next line (width * bytes per pixel)?
+ dstPtr = OutputScreen; //how many bytes to the next line?
+
+#ifdef MMX
+ if (mmx_cpu)
+ {
+ for (height; height; height-=1)
+ {
+
+ bP = (uint16 *) srcPtr;
+ dP = (uint32 *) dstPtr;
+ __2xSaILine ((uint8 *) bP, GFX.Pitch, width, (uint8 *) dP, dstPitch);
+ dstPtr += 2*dstPitch; //2 lines further
+ srcPtr += GFX.Pitch;
+ }
+ }
+ else
+ {
+#endif
+
+ uint32 Nextline = GFX.Pitch >> 1; //2 bytes per pixel
+#ifdef SHARPEN
+ uint32 TempColor = 0;
+ uint32 Sharpened = 0;
+#endif
+ dstPitch >>= 2; //not really the pitch; the amount of pixels, per line
+ //pitch / bytes per pixel. 4, not 2, cuz we're writing 2 pixels at the time
+
+ for (height; height; height-=1)
+ {
+ bP = (uint16 *) srcPtr;
+ dP = (uint32 *) dstPtr;
+ for (uint32 finish = width; finish; finish -= 1 )
+ {
+
+ register uint32 colorA, colorB;
+ uint32 colorC, colorD,
+ colorE, colorF, colorG, colorH,
+ colorI, colorJ, colorK, colorL,
+ colorM, colorN, colorO, colorP;
+ uint32 product, product1, product2;
+
+
+//---------------------------------------
+// Map of the pixels: I|E F|J
+// G|A B|K
+// H|C D|L
+// M|N O|P
+ colorI = *(bP- Nextline - 1);
+ colorE = *(bP- Nextline);
+ colorF = *(bP- Nextline + 1);
+ colorJ = *(bP- Nextline + 2);
+
+ colorG = *(bP - 1);
+ colorA = *(bP);
+ colorB = *(bP + 1);
+ colorK = *(bP + 2);
+
+ colorH = *(bP + Nextline - 1);
+ colorC = *(bP + Nextline);
+ colorD = *(bP + Nextline + 1);
+ colorL = *(bP + Nextline + 2);
+
+ colorM = *(bP + Nextline + Nextline - 1);
+ colorN = *(bP + Nextline + Nextline);
+ colorO = *(bP + Nextline + Nextline + 1);
+ colorP = *(bP + Nextline + Nextline + 2);
+
+
+ if ((colorA == colorD) && (colorB != colorC))
+ {
+ if ( ((colorA == colorE) && (colorB == colorL)) ||
+ ((colorA == colorC) && (colorA == colorF) && (colorB != colorE) && (colorB == colorJ)) )
+ {
+ product = colorA;
+ }
+ else
+ {
+ product = INTERPOLATE(colorA, colorB);
+ }
+
+ if (((colorA == colorG) && (colorC == colorO)) ||
+ ((colorA == colorB) && (colorA == colorH) && (colorG != colorC) && (colorC == colorM)) )
+ {
+ product1 = colorA;
+ }
+ else
+ {
+ product1 = INTERPOLATE(colorA, colorC);
+ }
+ product2 = colorA;
+ }
+ else
+ if ((colorB == colorC) && (colorA != colorD))
+ {
+ if (((colorB == colorF) && (colorA == colorH)) ||
+ ((colorB == colorE) && (colorB == colorD) && (colorA != colorF) && (colorA == colorI)) )
+ {
+ product = colorB;
+ }
+ else
+ {
+ product = INTERPOLATE(colorA, colorB);
+ }
+
+ if (((colorC == colorH) && (colorA == colorF)) ||
+ ((colorC == colorG) && (colorC == colorD) && (colorA != colorH) && (colorA == colorI)) )
+ {
+ product1 = colorC;
+ }
+ else
+ {
+ product1 = INTERPOLATE(colorA, colorC);
+ }
+ product2 = colorB;
+ }
+ else
+ if ((colorA == colorD) && (colorB == colorC))
+ {
+ if (colorA == colorB)
+ {
+ product = colorA;
+ product1 = colorA;
+ product2 = colorA;
+ }
+ else
+ {
+ register int r = 0;
+ product1 = INTERPOLATE(colorA, colorC);
+ product = INTERPOLATE(colorA, colorB);
+
+ r += GetResult1 (colorA, colorB, colorG, colorE, colorI);
+ r += GetResult2 (colorB, colorA, colorK, colorF, colorJ);
+ r += GetResult2 (colorB, colorA, colorH, colorN, colorM);
+ r += GetResult1 (colorA, colorB, colorL, colorO, colorP);
+
+ if (r > 0)
+ product2 = colorA;
+ else
+ if (r < 0)
+ product2 = colorB;
+ else
+ {
+ product2 = Q_INTERPOLATE(colorA, colorB, colorC, colorD);
+ }
+ }
+ }
+ else
+ {
+ product2 = Q_INTERPOLATE(colorA, colorB, colorC, colorD);
+
+ if ((colorA == colorC) && (colorA == colorF) && (colorB != colorE) && (colorB == colorJ))
+ {
+ product = colorA;
+ }
+ else
+ if ((colorB == colorE) && (colorB == colorD) && (colorA != colorF) && (colorA == colorI))
+ {
+ product = colorB;
+ }
+ else
+ {
+ product = INTERPOLATE(colorA, colorB);
+ }
+
+ if ((colorA == colorB) && (colorA == colorH) && (colorG != colorC) && (colorC == colorM))
+ {
+ product1 = colorA;
+ }
+ else
+ if ((colorC == colorG) && (colorC == colorD) && (colorA != colorH) && (colorA == colorI))
+ {
+ product1 = colorC;
+ }
+ else
+ {
+ product1 = INTERPOLATE(colorA, colorC);
+ }
+ }
+#ifndef SHARPEN
+ *(dP) = colorA | (product << 16);
+ *(dP + dstPitch) = product1 | (product2 << 16);
+#else
+ Sharpened = RowSharpen ( TempColor, colorA, product);
+ Sharpened |= (RowSharpen ( colorA, product, colorB) << 16);
+ *(dP) = Sharpened;
+ *(dP + dstPitch) = product1| (product2 << 16);
+
+ TempColor = product;
+#endif
+ bP += 1;
+ dP += 1;
+ }//end of for ( finish= width etc..)
+#ifdef SHARPEN
+ TempColor = 0;
+#endif
+
+ dstPtr += (OutputPitch << 1); //not really the pitch; the amount of pixels, per line
+ srcPtr += GFX.Pitch;
+ }; //endof: for (height; height; height--)
+#ifdef MMX
+ }
+#endif
+}
+/* End of the 2xSaI code */
+/*-----------------------------------------------------------------*/
+
#ifdef __linux
extern "C" {
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