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snes9x/filter/2xsai.cpp

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/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
#include "snes9x.h"
#include "2xsai.h"
#define ALL_COLOR_MASK (FIRST_COLOR_MASK | SECOND_COLOR_MASK | THIRD_COLOR_MASK)
#define colorMask (((~RGB_LOW_BITS_MASK & ALL_COLOR_MASK) << 16) | (~RGB_LOW_BITS_MASK & ALL_COLOR_MASK))
#define qcolorMask (((~TWO_LOW_BITS_MASK & ALL_COLOR_MASK) << 16) | (~TWO_LOW_BITS_MASK & ALL_COLOR_MASK))
#define lowPixelMask ((RGB_LOW_BITS_MASK << 16) | RGB_LOW_BITS_MASK)
#define qlowpixelMask ((TWO_LOW_BITS_MASK << 16) | TWO_LOW_BITS_MASK)
static inline int GetResult (uint32, uint32, uint32, uint32);
static inline int GetResult1 (uint32, uint32, uint32, uint32, uint32);
static inline int GetResult2 (uint32, uint32, uint32, uint32, uint32);
static inline uint32 INTERPOLATE (uint32, uint32);
static inline uint32 Q_INTERPOLATE (uint32, uint32, uint32, uint32);
static inline int GetResult (uint32 A, uint32 B, uint32 C, uint32 D)
{
int x = 0, y = 0, 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);
}
static inline int GetResult1 (uint32 A, uint32 B, uint32 C, uint32 D, uint32 E)
{
int x = 0, y = 0, 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);
}
static inline int GetResult2 (uint32 A, uint32 B, uint32 C, uint32 D, uint32 E)
{
int x = 0, y = 0, 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);
}
static inline uint32 INTERPOLATE (uint32 A, uint32 B)
{
return (((A & colorMask) >> 1) + ((B & colorMask) >> 1) + (A & B & lowPixelMask));
}
static inline uint32 Q_INTERPOLATE (uint32 A, uint32 B, uint32 C, uint32 D)
{
uint32 x = ((A & qcolorMask) >> 2) + ((B & qcolorMask) >> 2) + ((C & qcolorMask) >> 2) + ((D & qcolorMask) >> 2);
uint32 y = (A & qlowpixelMask) + (B & qlowpixelMask) + (C & qlowpixelMask) + (D & qlowpixelMask);
y = (y >> 2) & qlowpixelMask;
return (x + y);
}
bool8 S9xBlit2xSaIFilterInit (void)
{
return (TRUE);
}
void S9xBlit2xSaIFilterDeinit (void)
{
return;
}
void SuperEagle (uint8 *srcPtr, int srcRowBytes, uint8 *dstPtr, int dstRowBytes, int width, int height)
{
uint16 *bP;
uint32 *dP;
uint32 nextline = srcRowBytes >> 1;
for (; height; height--)
{
bP = (uint16 *) srcPtr;
dP = (uint32 *) dstPtr;
for (int i = 0; i < width; i++)
{
uint32 color1, color2, color3, color4, color5, color6;
uint32 colorA1, colorA2, colorB1, colorB2, colorS1, colorS2;
uint32 product1a, product1b, product2a, product2b;
colorB1 = *(bP - nextline );
colorB2 = *(bP - nextline + 1);
color4 = *(bP - 1);
color5 = *(bP );
color6 = *(bP + 1);
colorS2 = *(bP + 2);
color1 = *(bP + nextline - 1);
color2 = *(bP + nextline );
color3 = *(bP + nextline + 1);
colorS1 = *(bP + nextline + 2);
colorA1 = *(bP + nextline + nextline );
colorA2 = *(bP + nextline + nextline + 1);
if (color2 == color6 && color5 != color3)
{
product1b = product2a = color2;
if ((color1 == color2 && color6 == colorS2) || (color2 == colorA1 && color6 == colorB2))
{
product1a = INTERPOLATE(color2, color5);
product1a = INTERPOLATE(color2, product1a);
product2b = INTERPOLATE(color2, color3);
product2b = INTERPOLATE(color2, product2b);
}
else
{
product1a = INTERPOLATE(color5, color6);
product2b = INTERPOLATE(color2, color3);
}
}
else
if (color5 == color3 && color2 != color6)
{
product2b = product1a = color5;
if ((colorB1 == color5 && color3 == colorA2) || (color4 == color5 && color3 == colorS1))
{
product1b = INTERPOLATE(color5, color6);
product1b = INTERPOLATE(color5, product1b);
product2a = INTERPOLATE(color5, color2);
product2a = INTERPOLATE(color5, product2a);
}
else
{
product1b = INTERPOLATE(color5, color6);
product2a = INTERPOLATE(color2, color3);
}
}
else
if (color5 == color3 && color2 == color6 && color5 != color6)
{
int r = 0;
r += GetResult(color6, color5, color1, colorA1);
r += GetResult(color6, color5, color4, colorB1);
r += GetResult(color6, color5, colorA2, colorS1);
r += GetResult(color6, color5, colorB2, colorS2);
if (r > 0)
{
product1b = product2a = color2;
product1a = product2b = INTERPOLATE(color5, color6);
}
else
if (r < 0)
{
product2b = product1a = color5;
product1b = product2a = INTERPOLATE(color5, color6);
}
else
{
product2b = product1a = color5;
product1b = product2a = color2;
}
}
else
{
if ((color2 == color5) || (color3 == color6))
{
product1a = color5;
product2a = color2;
product1b = color6;
product2b = color3;
}
else
{
product1b = product1a = INTERPOLATE(color5, color6);
product1a = INTERPOLATE(color5, product1a);
product1b = INTERPOLATE(color6, product1b);
product2a = product2b = INTERPOLATE(color2, color3);
product2a = INTERPOLATE(color2, product2a);
product2b = INTERPOLATE(color3, product2b);
}
}
#ifdef MSB_FIRST
product1a = (product1a << 16) | product1b;
product2a = (product2a << 16) | product2b;
#else
product1a = product1a | (product1b << 16);
product2a = product2a | (product2b << 16);
#endif
*(dP) = product1a;
*(dP + (dstRowBytes >> 2)) = product2a;
bP++;
dP++;
}
dstPtr += dstRowBytes << 1;
srcPtr += srcRowBytes;
}
}
void _2xSaI (uint8 *srcPtr, int srcRowBytes, uint8 *dstPtr, int dstRowBytes, int width, int height)
{
uint16 *bP;
uint32 *dP;
uint32 nextline = srcRowBytes >> 1;
for (; height; height--)
{
bP = (uint16 *) srcPtr;
dP = (uint32 *) dstPtr;
for (int i = 0; i < width; i++)
{
uint32 colorA, colorB, colorC, colorD, colorE, colorF, colorG, colorH, colorI, colorJ, colorK, colorL, colorM, colorN, colorO, colorP;
uint32 product, product1, product2;
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
{
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);
}
#ifdef MSB_FIRST
product = (colorA << 16) | product;
product1 = (product1 << 16) | product2;
#else
product = colorA | (product << 16);
product1 = product1 | (product2 << 16);
#endif
*(dP) = product;
*(dP + (dstRowBytes >> 2)) = product1;
bP++;
dP++;
}
dstPtr += dstRowBytes << 1;
srcPtr += srcRowBytes;
}
}
void Super2xSaI (uint8 *srcPtr, int srcRowBytes, uint8 *dstPtr, int dstRowBytes, int width, int height)
{
uint16 *bP;
uint32 *dP;
uint32 nextline = srcRowBytes >> 1;
for (; height; height--)
{
bP = (uint16 *) srcPtr;
dP = (uint32 *) dstPtr;
for (int i = 0; i < width; i++)
{
uint32 color1, color2, color3, color4, color5, color6;
uint32 colorA0, colorA1, colorA2, colorA3, colorB0, colorB1, colorB2, colorB3, colorS1, colorS2;
uint32 product1a, product1b, product2a, product2b;
colorB0 = *(bP - nextline - 1);
colorB1 = *(bP - nextline );
colorB2 = *(bP - nextline + 1);
colorB3 = *(bP - nextline + 2);
color4 = *(bP - 1);
color5 = *(bP );
color6 = *(bP + 1);
colorS2 = *(bP + 2);
color1 = *(bP + nextline - 1);
color2 = *(bP + nextline );
color3 = *(bP + nextline + 1);
colorS1 = *(bP + nextline + 2);
colorA0 = *(bP + nextline + nextline - 1);
colorA1 = *(bP + nextline + nextline );
colorA2 = *(bP + nextline + nextline + 1);
colorA3 = *(bP + nextline + nextline + 2);
if (color2 == color6 && color5 != color3)
product2b = product1b = color2;
else
if (color5 == color3 && color2 != color6)
product2b = product1b = color5;
else
if (color5 == color3 && color2 == color6 && color5 != color6)
{
int r = 0;
r += GetResult(color6, color5, color1, colorA1);
r += GetResult(color6, color5, color4, colorB1);
r += GetResult(color6, color5, colorA2, colorS1);
r += GetResult(color6, color5, colorB2, colorS2);
if (r > 0)
product2b = product1b = color6;
else
if (r < 0)
product2b = product1b = color5;
else
product2b = product1b = INTERPOLATE(color5, color6);
}
else
{
if (color6 == color3 && color3 == colorA1 && color2 != colorA2 && color3 != colorA0)
product2b = Q_INTERPOLATE(color3, color3, color3, color2);
else
if (color5 == color2 && color2 == colorA2 && colorA1 != color3 && color2 != colorA3)
product2b = Q_INTERPOLATE(color2, color2, color2, color3);
else
product2b = INTERPOLATE(color2, color3);
if (color6 == color3 && color6 == colorB1 && color5 != colorB2 && color6 != colorB0)
product1b = Q_INTERPOLATE(color6, color6, color6, color5);
else
if (color5 == color2 && color5 == colorB2 && colorB1 != color6 && color5 != colorB3)
product1b = Q_INTERPOLATE(color6, color5, color5, color5);
else
product1b = INTERPOLATE (color5, color6);
}
if (color5 == color3 && color2 != color6 && color4 == color5 && color5 != colorA2)
product2a = INTERPOLATE(color2, color5);
else
if (color5 == color1 && color6 == color5 && color4 != color2 && color5 != colorA0)
product2a = INTERPOLATE(color2, color5);
else
product2a = color2;
if (color2 == color6 && color5 != color3 && color1 == color2 && color2 != colorB2)
product1a = INTERPOLATE(color2, color5);
else
if (color4 == color2 && color3 == color2 && color1 != color5 && color2 != colorB0)
product1a = INTERPOLATE(color2, color5);
else
product1a = color5;
#ifdef MSB_FIRST
product1a = (product1a << 16) | product1b;
product2a = (product2a << 16) | product2b;
#else
product1a = product1a | (product1b << 16);
product2a = product2a | (product2b << 16);
#endif
*(dP) = product1a;
*(dP +(dstRowBytes >> 2)) = product2a;
bP++;
dP++;
}
dstPtr += dstRowBytes << 1;
srcPtr += srcRowBytes;
}
}
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