X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=source%2Fgles2glide64%2Fsrc%2FGlideHQ%2FTextureFilters.cpp;fp=source%2Fgles2glide64%2Fsrc%2FGlideHQ%2FTextureFilters.cpp;h=b46dcb566b707affaf46b6e2911a5e5a9d4aab2e;hb=98e75f2d18c02c233da543560f76282f04fc796c;hp=0000000000000000000000000000000000000000;hpb=0ced54f867d36e8b324155bef49e8abfebfc3237;p=mupen64plus-pandora.git

diff --git a/source/gles2glide64/src/GlideHQ/TextureFilters.cpp b/source/gles2glide64/src/GlideHQ/TextureFilters.cpp
new file mode 100644
index 0000000..b46dcb5
--- /dev/null
+++ b/source/gles2glide64/src/GlideHQ/TextureFilters.cpp
@@ -0,0 +1,702 @@
+/*
+Copyright (C) 2003 Rice1964
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+/* Copyright (C) 2007 Hiroshi Morii <koolsmoky(at)users.sourceforge.net>
+ * Modified for the Texture Filtering library
+ */
+
+#include <string.h>
+#include "TextureFilters.h"
+
+/************************************************************************/
+/* 2X filters                                                           */
+/************************************************************************/
+
+#define DWORD_MAKE(r, g, b, a)   ((uint32) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b)))
+#define WORD_MAKE(r, g, b, a)   ((uint16) (((a) << 12) | ((r) << 8) | ((g) << 4) | (b)))
+
+// Basic 2x R8G8B8A8 filter with interpolation
+
+void Texture2x_32(uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height)
+{
+  uint32 *pDst1, *pDst2;
+  uint32 *pSrc, *pSrc2;
+  uint32 nWidth = width;
+  uint32 nHeight = height;
+
+  uint32 b1;
+  uint32 g1;
+  uint32 r1;
+  uint32 a1;
+  uint32 b2;
+  uint32 g2;
+  uint32 r2;
+  uint32 a2;
+  uint32 b3;
+  uint32 g3;
+  uint32 r3;
+  uint32 a3;
+  uint32 b4;
+  uint32 g4;
+  uint32 r4;
+  uint32 a4;
+
+  uint32 xSrc;
+  uint32 ySrc;
+
+  for (ySrc = 0; ySrc < nHeight; ySrc++)
+  {
+    pSrc = (uint32*)(((uint8*)srcPtr)+ySrc*srcPitch);
+    pSrc2 = (uint32*)(((uint8*)srcPtr)+(ySrc+1)*srcPitch);
+    pDst1 = (uint32*)(((uint8*)dstPtr)+(ySrc*2)*dstPitch);
+    pDst2 = (uint32*)(((uint8*)dstPtr)+(ySrc*2+1)*dstPitch);
+
+    for (xSrc = 0; xSrc < nWidth; xSrc++)
+    {
+      b1 = (pSrc[xSrc]>>0)&0xFF;
+      g1 = (pSrc[xSrc]>>8)&0xFF;
+      r1 = (pSrc[xSrc]>>16)&0xFF;
+      a1 = (pSrc[xSrc]>>24)&0xFF;
+
+      // Pixel 1
+      pDst1[xSrc*2] = pSrc[xSrc];
+
+      // Pixel 2
+      if( xSrc<nWidth-1 )
+      {
+        b2 = (pSrc[xSrc+1]>>0)&0xFF;
+        g2 = (pSrc[xSrc+1]>>8)&0xFF;
+        r2 = (pSrc[xSrc+1]>>16)&0xFF;
+        a2 = (pSrc[xSrc+1]>>24)&0xFF;
+        pDst1[xSrc*2+1] = DWORD_MAKE((r1+r2)/2, (g1+g2)/2, (b1+b2)/2, (a1+a2)/2);
+      }
+      else
+        pDst1[xSrc*2+1] = pSrc[xSrc];
+
+      // Pixel 3
+      if( ySrc<nHeight-1 )
+      {
+        b3 = (pSrc2[xSrc]>>0)&0xFF;
+        g3 = (pSrc2[xSrc]>>8)&0xFF;
+        r3 = (pSrc2[xSrc]>>16)&0xFF;
+        a3 = (pSrc2[xSrc]>>24)&0xFF;
+        pDst2[xSrc*2] = DWORD_MAKE((r1+r3)/2, (g1+g3)/2, (b1+b3)/2, (a1+a3)/2);
+        if( xSrc<nWidth-1 )
+        {
+          b4 = (pSrc2[xSrc+1]>>0)&0xFF;
+          g4 = (pSrc2[xSrc+1]>>8)&0xFF;
+          r4 = (pSrc2[xSrc+1]>>16)&0xFF;
+          a4 = (pSrc2[xSrc+1]>>24)&0xFF;
+          // Pixel 4
+          pDst2[xSrc*2+1] = DWORD_MAKE((r1+r2+r3+r4)/4, (g1+g2+g3+g4)/4, (b1+b2+b3+b4)/4, (a1+a2+a3+a4)/4);
+        }
+        else
+        {
+          // Pixel 4
+          pDst2[xSrc*2+1] = DWORD_MAKE((r1+r3)/2, (g1+g3)/2, (b1+b3)/2, (a1+a3)/2);
+        }
+      }
+      else
+      {
+        // Pixel 3
+        pDst2[xSrc*2] = pSrc[xSrc];
+        // Pixel 4
+        if( xSrc<nWidth-1 )
+        {
+          pDst2[xSrc*2+1] = DWORD_MAKE((r1+r2)/2, (g1+g2)/2, (b1+b2)/2, (a1+a2)/2);
+        }
+        else
+        {
+          pDst2[xSrc*2+1] = pSrc[xSrc];
+        }
+      }
+    }
+  }
+}
+
+#if !_16BPP_HACK
+// Basic 2x R4G4B4A4 filter with interpolation
+void Texture2x_16(uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch, int width, int height)
+{
+  uint16 *pDst1, *pDst2;
+  uint16 *pSrc, *pSrc2;
+  uint32 nWidth = width;
+  uint32 nHeight = height;
+
+  uint16 b1;
+  uint16 g1;
+  uint16 r1;
+  uint16 a1;
+  uint16 b2;
+  uint16 g2;
+  uint16 r2;
+  uint16 a2;
+  uint16 b3;
+  uint16 g3;
+  uint16 r3;
+  uint16 a3;
+  uint16 b4;
+  uint16 g4;
+  uint16 r4;
+  uint16 a4;
+
+  uint16 xSrc;
+  uint16 ySrc;
+
+  for (ySrc = 0; ySrc < nHeight; ySrc++)
+  {
+    pSrc = (uint16*)(((uint8*)srcPtr)+ySrc*srcPitch);
+    pSrc2 = (uint16*)(((uint8*)srcPtr)+(ySrc+1)*srcPitch);
+    pDst1 = (uint16*)(((uint8*)dstPtr)+(ySrc*2)*dstPitch);
+    pDst2 = (uint16*)(((uint8*)dstPtr)+(ySrc*2+1)*dstPitch);
+
+    for (xSrc = 0; xSrc < nWidth; xSrc++)
+    {
+      b1 = (pSrc[xSrc]>> 0)&0xF;
+      g1 = (pSrc[xSrc]>> 4)&0xF;
+      r1 = (pSrc[xSrc]>> 8)&0xF;
+      a1 = (pSrc[xSrc]>>12)&0xF;
+
+      if( xSrc<nWidth-1 )
+      {
+        b2 = (pSrc[xSrc+1]>> 0)&0xF;
+        g2 = (pSrc[xSrc+1]>> 4)&0xF;
+        r2 = (pSrc[xSrc+1]>> 8)&0xF;
+        a2 = (pSrc[xSrc+1]>>12)&0xF;
+      }
+
+      if( ySrc<nHeight-1 )
+      {
+        b3 = (pSrc2[xSrc]>> 0)&0xF;
+        g3 = (pSrc2[xSrc]>> 4)&0xF;
+        r3 = (pSrc2[xSrc]>> 8)&0xF;
+        a3 = (pSrc2[xSrc]>>12)&0xF;
+        if( xSrc<nWidth-1 )
+        {
+          b4 = (pSrc2[xSrc+1]>> 0)&0xF;
+          g4 = (pSrc2[xSrc+1]>> 4)&0xF;
+          r4 = (pSrc2[xSrc+1]>> 8)&0xF;
+          a4 = (pSrc2[xSrc+1]>>12)&0xF;
+        }
+      }
+
+      // Pixel 1
+      pDst1[xSrc*2] = pSrc[xSrc];
+
+      // Pixel 2
+      if( xSrc<nWidth-1 )
+      {
+        pDst1[xSrc*2+1] = WORD_MAKE((r1+r2)/2, (g1+g2)/2, (b1+b2)/2, (a1+a2)/2);
+      }
+      else
+        pDst1[xSrc*2+1] = pSrc[xSrc];
+
+
+      // Pixel 3
+      if( ySrc<nHeight-1 )
+      {
+        pDst2[xSrc*2] = WORD_MAKE((r1+r3)/2, (g1+g3)/2, (b1+b3)/2, (a1+a3)/2);
+      }
+      else
+        pDst2[xSrc*2] = pSrc[xSrc];
+
+      // Pixel 4
+      if( xSrc<nWidth-1 )
+      {
+        if( ySrc<nHeight-1 )
+        {
+          pDst2[xSrc*2+1] = WORD_MAKE((r1+r2+r3+r4)/4, (g1+g2+g3+g4)/4, (b1+b2+b3+b4)/4, (a1+a2+a3+a4)/4);
+        }
+        else
+        {
+          pDst2[xSrc*2+1] = WORD_MAKE((r1+r2)/2, (g1+g2)/2, (b1+b2)/2, (a1+a2)/2);
+        }
+      }
+      else
+      {
+        if( ySrc<nHeight-1 )
+        {
+          pDst2[xSrc*2+1] = WORD_MAKE((r1+r3)/2, (g1+g3)/2, (b1+b3)/2, (a1+a3)/2);
+        }
+        else
+          pDst2[xSrc*2+1] = pSrc[xSrc];
+      }
+    }
+  }
+}
+#endif /* !_16BPP_HACK */
+
+/*
+ * Sharp filters
+ * Hiroshi Morii <koolsmoky@users.sourceforge.net>
+ */
+void SharpFilter_8888(uint32 *src, uint32 srcwidth, uint32 srcheight, uint32 *dest, uint32 filter)
+{
+  // NOTE: for now we get away with copying the boundaries
+  //       filter the boundaries if we face problems
+
+  uint32 mul1, mul2, mul3, shift4;
+
+  uint32 x,y,z;
+  uint32 *_src1, *_src2, *_src3, *_dest;
+  uint32 val[4];
+  uint32 t1,t2,t3,t4,t5,t6,t7,t8,t9;
+
+  switch( filter )
+  {
+  case SHARP_FILTER_2:
+    mul1=1;
+    mul2=8;
+    mul3=12;
+    shift4=2;
+    break;
+  case SHARP_FILTER_1:
+  default:
+    mul1=1;
+    mul2=8;
+    mul3=16;
+    shift4=3;
+    break;
+  }
+
+  // setup rows
+  _src1 = src;
+  _src2 = _src1 + srcwidth;
+  _src3 = _src2 + srcwidth;
+  _dest = dest;
+
+  // copy the first row
+  memcpy(_dest, _src1, (srcwidth << 2));
+  _dest += srcwidth;
+  // filter 2nd row to 1 row before the last
+  for (y = 1; y < srcheight-1; y++) {
+    // copy the first pixel
+    _dest[0] = *_src2;
+    // filter 2nd pixel to 1 pixel before last
+    for (x = 1; x < srcwidth-1; x++) {
+      for (z=0; z<4; z++) {
+        t1 = *((uint8*)(_src1+x-1)+z);
+        t2 = *((uint8*)(_src1+x  )+z);
+        t3 = *((uint8*)(_src1+x+1)+z);
+        t4 = *((uint8*)(_src2+x-1)+z);
+        t5 = *((uint8*)(_src2+x  )+z);
+        t6 = *((uint8*)(_src2+x+1)+z);
+        t7 = *((uint8*)(_src3+x-1)+z);
+        t8 = *((uint8*)(_src3+x  )+z);
+        t9 = *((uint8*)(_src3+x+1)+z);
+        
+        if( (t5*mul2) > (t1+t3+t7+t9+t2+t4+t6+t8)*mul1 ) {
+          val[z]= ((t5*mul3) - (t1+t3+t7+t9+t2+t4+t6+t8)*mul1)>>shift4;
+          if (val[z] > 0xFF) val[z] = 0xFF;
+        } else {
+          val[z] = t5;
+        }
+      }
+      _dest[x] = val[0]|(val[1]<<8)|(val[2]<<16)|(val[3]<<24);
+    }
+    // copy the ending pixel
+    _dest[srcwidth-1] = *(_src3 - 1);
+    // next row
+    _src1 += srcwidth;
+    _src2 += srcwidth;
+    _src3 += srcwidth;
+    _dest += srcwidth;
+  }
+  // copy the last row
+  memcpy(_dest, _src2, (srcwidth << 2));
+}
+
+#if !_16BPP_HACK
+void SharpFilter_4444(uint16 *src, uint32 srcwidth, uint32 srcheight, uint16 *dest, uint32 filter)
+{
+  // NOTE: for now we get away with copying the boundaries
+  //       filter the boundaries if we face problems
+
+  uint16 mul1, mul2, mul3, shift4;
+
+  uint32 x,y,z;
+  uint16 *_src1, *_src2, *_src3, *_dest;
+  uint16 val[4];
+  uint16 t1,t2,t3,t4,t5,t6,t7,t8,t9;
+
+  switch( filter ) {
+  case SHARP_FILTER_2:
+    mul1=1;
+    mul2=8;
+    mul3=12;
+    shift4=2;
+    break;
+  case SHARP_FILTER_1:
+  default:
+    mul1=1;
+    mul2=8;
+    mul3=16;
+    shift4=3;
+    break;
+  }
+
+  // setup rows
+  _src1 = src;
+  _src2 = _src1 + srcwidth;
+  _src3 = _src2 + srcwidth;
+  _dest = dest;
+
+  // copy the first row
+  memcpy(_dest, _src1, (srcwidth << 1));
+  _dest += srcwidth;
+  // filter 2nd row to 1 row before the last
+  for( y = 1; y < srcheight - 1; y++) {
+    // copy the first pixel
+    _dest[0] = *_src2;
+    // filter 2nd pixel to 1 pixel before last
+    for( x = 1; x < srcwidth - 1; x++) {
+      for( z = 0; z < 4; z++ ) {
+        /* Hiroshi Morii <koolsmoky@users.sourceforge.net>
+         * Read the entire 16bit pixel and then extract the A,R,G,B components.
+         */
+        uint32 shift = z << 2;
+        t1 = ((*((uint16*)(_src1+x-1))) >> shift) & 0xF;
+        t2 = ((*((uint16*)(_src1+x  ))) >> shift) & 0xF;
+        t3 = ((*((uint16*)(_src1+x+1))) >> shift) & 0xF;
+        t4 = ((*((uint16*)(_src2+x-1))) >> shift) & 0xF;
+        t5 = ((*((uint16*)(_src2+x  ))) >> shift) & 0xF;
+        t6 = ((*((uint16*)(_src2+x+1))) >> shift) & 0xF;
+        t7 = ((*((uint16*)(_src3+x-1))) >> shift) & 0xF;
+        t8 = ((*((uint16*)(_src3+x  ))) >> shift) & 0xF;
+        t9 = ((*((uint16*)(_src3+x+1))) >> shift) & 0xF;
+        
+        if( (t5*mul2) > (t1+t3+t7+t9+t2+t4+t6+t8)*mul1 ) {
+          val[z] = ((t5*mul3) - (t1+t3+t7+t9+t2+t4+t6+t8)*mul1)>>shift4;
+          if (val[z] > 0xF) val[z] = 0xF;
+        } else {
+          val[z] = t5;
+        }
+      }
+      _dest[x] = val[0]|(val[1]<<4)|(val[2]<<8)|(val[3]<<12);
+    }
+    // copy the ending pixel
+    _dest[srcwidth-1] = *(_src3 - 1);
+    // next row
+    _src1 += srcwidth;
+    _src2 += srcwidth;
+    _src3 += srcwidth;
+    _dest += srcwidth;
+  }
+  // copy the last row
+  memcpy(_dest, _src2, (srcwidth << 1));
+}
+#endif /* !_16BPP_HACK */
+
+/*
+ * Smooth filters
+ * Hiroshi Morii <koolsmoky@users.sourceforge.net>
+ */
+void SmoothFilter_8888(uint32 *src, uint32 srcwidth, uint32 srcheight, uint32 *dest, uint32 filter)
+{
+  // NOTE: for now we get away with copying the boundaries
+  //       filter the boundaries if we face problems
+
+  uint32 mul1, mul2, mul3, shift4;
+
+  uint32 x,y,z;
+  uint32 *_src1, *_src2, *_src3, *_dest;
+  uint32 val[4];
+  uint32 t1,t2,t3,t4,t5,t6,t7,t8,t9;
+
+  switch( filter ) {
+  case SMOOTH_FILTER_4:
+    mul1=1;
+    mul2=2;
+    mul3=4;
+    shift4=4;
+    break;
+  case SMOOTH_FILTER_3:
+    mul1=1;
+    mul2=1;
+    mul3=8;
+    shift4=4;
+    break;
+  case SMOOTH_FILTER_2:
+    mul1=1;
+    mul2=1;
+    mul3=2;
+    shift4=2;
+    break;
+  case SMOOTH_FILTER_1:
+  default:
+    mul1=1;
+    mul2=1;
+    mul3=6;
+    shift4=3;
+    break;
+  }
+
+  switch (filter) {
+  case SMOOTH_FILTER_3:
+  case SMOOTH_FILTER_4:
+    // setup rows
+    _src1 = src;
+    _src2 = _src1 + srcwidth;
+    _src3 = _src2 + srcwidth;
+    _dest = dest;
+    // copy the first row
+    memcpy(_dest, _src1, (srcwidth << 2));
+    _dest += srcwidth;
+    // filter 2nd row to 1 row before the last
+    for (y = 1; y < srcheight - 1; y++){
+      // copy the first pixel
+      _dest[0] = _src2[0];
+      // filter 2nd pixel to 1 pixel before last
+      for (x = 1; x < srcwidth - 1; x++) {
+        for (z = 0; z < 4; z++ ) {
+          t1 = *((uint8*)(_src1+x-1)+z);
+          t2 = *((uint8*)(_src1+x  )+z);
+          t3 = *((uint8*)(_src1+x+1)+z);
+          t4 = *((uint8*)(_src2+x-1)+z);
+          t5 = *((uint8*)(_src2+x  )+z);
+          t6 = *((uint8*)(_src2+x+1)+z);
+          t7 = *((uint8*)(_src3+x-1)+z);
+          t8 = *((uint8*)(_src3+x  )+z);
+          t9 = *((uint8*)(_src3+x+1)+z);
+          /* the component value must not overflow 0xFF */
+          val[z] = ((t1+t3+t7+t9)*mul1+((t2+t4+t6+t8)*mul2)+(t5*mul3))>>shift4;
+          if (val[z] > 0xFF) val[z] = 0xFF;
+        }
+        _dest[x] = val[0]|(val[1]<<8)|(val[2]<<16)|(val[3]<<24);
+      }
+      // copy the ending pixel
+      _dest[srcwidth-1] = *(_src3 - 1);
+      // next row
+      _src1 += srcwidth;
+      _src2 += srcwidth;
+      _src3 += srcwidth;
+      _dest += srcwidth;
+    }
+    // copy the last row
+    memcpy(_dest, _src2, (srcwidth << 2));
+    break;
+  case SMOOTH_FILTER_1:
+  case SMOOTH_FILTER_2:
+  default:
+    // setup rows
+    _src1 = src;
+    _src2 = _src1 + srcwidth;
+    _src3 = _src2 + srcwidth;
+    _dest = dest;
+    // copy the first row
+    memcpy(_dest, _src1, (srcwidth << 2));
+    _dest += srcwidth;
+    // filter 2nd row to 1 row before the last
+    for (y = 1; y < srcheight - 1; y++) {
+      // filter 1st pixel to the last
+      if (y & 1) {
+        for( x = 0; x < srcwidth; x++) {
+          for( z = 0; z < 4; z++ ) {
+            t2 = *((uint8*)(_src1+x  )+z);
+            t5 = *((uint8*)(_src2+x  )+z);
+            t8 = *((uint8*)(_src3+x  )+z);
+            /* the component value must not overflow 0xFF */
+            val[z] = ((t2+t8)*mul2+(t5*mul3))>>shift4;
+            if (val[z] > 0xFF) val[z] = 0xFF;
+          }
+          _dest[x] = val[0]|(val[1]<<8)|(val[2]<<16)|(val[3]<<24);
+        }
+      } else {
+         memcpy(_dest, _src2, (srcwidth << 2));
+      }
+      // next row
+      _src1 += srcwidth;
+      _src2 += srcwidth;
+      _src3 += srcwidth;
+      _dest += srcwidth;
+    }
+    // copy the last row
+    memcpy(_dest, _src2, (srcwidth << 2));
+    break;
+  }
+}
+
+#if !_16BPP_HACK
+void SmoothFilter_4444(uint16 *src, uint32 srcwidth, uint32 srcheight, uint16 *dest, uint32 filter)
+{
+  // NOTE: for now we get away with copying the boundaries
+  //       filter the boundaries if we face problems
+
+  uint16 mul1, mul2, mul3, shift4;
+
+  uint32 x,y,z;
+  uint16 *_src1, *_src2, *_src3, *_dest;
+  uint16 val[4];
+  uint16 t1,t2,t3,t4,t5,t6,t7,t8,t9;
+
+  switch( filter ) {
+  case SMOOTH_FILTER_4:
+    mul1=1;
+    mul2=2;
+    mul3=4;
+    shift4=4;
+    break;
+  case SMOOTH_FILTER_3:
+    mul1=1;
+    mul2=1;
+    mul3=8;
+    shift4=4;
+    break;
+  case SMOOTH_FILTER_2:
+    mul1=1;
+    mul2=1;
+    mul3=2;
+    shift4=2;
+    break;
+  case SMOOTH_FILTER_1:
+  default:
+    mul1=1;
+    mul2=1;
+    mul3=6;
+    shift4=3;
+    break;
+  }
+
+  switch (filter) {
+  case SMOOTH_FILTER_3:
+  case SMOOTH_FILTER_4:
+    // setup rows
+    _src1 = src;
+    _src2 = _src1 + srcwidth;
+    _src3 = _src2 + srcwidth;
+    _dest = dest;
+    // copy the first row
+    memcpy(_dest, _src1, (srcwidth << 1));
+    _dest += srcwidth;
+    // filter 2nd row to 1 row before the last
+    for (y = 1; y < srcheight - 1; y++) {
+      // copy the first pixel
+      _dest[0] = *_src2;
+      // filter 2nd pixel to 1 pixel before last
+      for (x = 1; x < srcwidth - 1; x++) {
+        for (z = 0; z < 4; z++ ) {
+          /* Read the entire 16bit pixel and then extract the A,R,G,B components. */
+          uint32 shift = z << 2;
+          t1 = ((*(uint16*)(_src1+x-1)) >> shift) & 0xF;
+          t2 = ((*(uint16*)(_src1+x  )) >> shift) & 0xF;
+          t3 = ((*(uint16*)(_src1+x+1)) >> shift) & 0xF;
+          t4 = ((*(uint16*)(_src2+x-1)) >> shift) & 0xF;
+          t5 = ((*(uint16*)(_src2+x  )) >> shift) & 0xF;
+          t6 = ((*(uint16*)(_src2+x+1)) >> shift) & 0xF;
+          t7 = ((*(uint16*)(_src3+x-1)) >> shift) & 0xF;
+          t8 = ((*(uint16*)(_src3+x  )) >> shift) & 0xF;
+          t9 = ((*(uint16*)(_src3+x+1)) >> shift) & 0xF;
+          /* the component value must not overflow 0xF */
+          val[z] = ((t1+t3+t7+t9)*mul1+((t2+t4+t6+t8)*mul2)+(t5*mul3))>>shift4;
+          if (val[z] > 0xF) val[z] = 0xF;
+        }
+        _dest[x] = val[0]|(val[1]<<4)|(val[2]<<8)|(val[3]<<12);
+      }
+      // copy the ending pixel
+      _dest[srcwidth-1] = *(_src3 - 1);
+      // next row
+      _src1 += srcwidth;
+      _src2 += srcwidth;
+      _src3 += srcwidth;
+      _dest += srcwidth;
+    }
+    // copy the last row
+    memcpy(_dest, _src2, (srcwidth << 1));
+    break;
+  case SMOOTH_FILTER_1:
+  case SMOOTH_FILTER_2:
+  default:
+    // setup rows
+    _src1 = src;
+    _src2 = _src1 + srcwidth;
+    _src3 = _src2 + srcwidth;
+    _dest = dest;
+    // copy the first row
+    memcpy(_dest, _src1, (srcwidth << 1));
+    _dest += srcwidth;
+    // filter 2nd row to 1 row before the last
+    for( y = 1; y < srcheight - 1; y++) {
+      if (y & 1) {
+        for( x = 0; x < srcwidth; x++) {
+          for( z = 0; z < 4; z++ ) {
+            /* Read the entire 16bit pixel and then extract the A,R,G,B components. */
+            uint32 shift = z << 2;
+            t2 = ((*(uint16*)(_src1+x)) >> shift) & 0xF;
+            t5 = ((*(uint16*)(_src2+x)) >> shift) & 0xF;
+            t8 = ((*(uint16*)(_src3+x)) >> shift) & 0xF;
+            /* the component value must not overflow 0xF */
+            val[z] = ((t2+t8)*mul2+(t5*mul3))>>shift4;
+            if (val[z] > 0xF) val[z] = 0xF;
+          }
+          _dest[x] = val[0]|(val[1]<<4)|(val[2]<<8)|(val[3]<<12);
+        }
+      } else {
+         memcpy(_dest, _src2, (srcwidth << 1));
+      }
+      // next row
+      _src1 += srcwidth;
+      _src2 += srcwidth;
+      _src3 += srcwidth;
+      _dest += srcwidth;
+    }
+    // copy the last row
+    memcpy(_dest, _src2, (srcwidth << 1));
+    break;
+  }
+}
+#endif /* !_16BPP_HACK */
+
+void filter_8888(uint32 *src, uint32 srcwidth, uint32 srcheight, uint32 *dest, uint32 filter) {
+  switch (filter & ENHANCEMENT_MASK) {
+  case HQ4X_ENHANCEMENT:
+    hq4x_8888((uint8*)src, (uint8*)dest, srcwidth, srcheight, srcwidth, (srcwidth << 4));
+    return;
+  case HQ2X_ENHANCEMENT:
+    hq2x_32((uint8*)src, (srcwidth << 2), (uint8*)dest, (srcwidth << 3), srcwidth, srcheight);
+    return;
+  case HQ2XS_ENHANCEMENT:
+    hq2xS_32((uint8*)src, (srcwidth << 2), (uint8*)dest, (srcwidth << 3), srcwidth, srcheight);
+    return;
+  case LQ2X_ENHANCEMENT:
+    lq2x_32((uint8*)src, (srcwidth << 2), (uint8*)dest, (srcwidth << 3), srcwidth, srcheight);
+    return;
+  case LQ2XS_ENHANCEMENT:
+    lq2xS_32((uint8*)src, (srcwidth << 2), (uint8*)dest, (srcwidth << 3), srcwidth, srcheight);
+    return;
+  case X2SAI_ENHANCEMENT:
+    Super2xSaI_8888((uint32*)src, (uint32*)dest, srcwidth, srcheight, srcwidth);
+    return;
+  case X2_ENHANCEMENT:
+    Texture2x_32((uint8*)src, (srcwidth << 2), (uint8*)dest, (srcwidth << 3), srcwidth, srcheight);
+    return;
+  }
+
+  switch (filter & (SMOOTH_FILTER_MASK|SHARP_FILTER_MASK)) {
+  case SMOOTH_FILTER_1:
+  case SMOOTH_FILTER_2:
+  case SMOOTH_FILTER_3:
+  case SMOOTH_FILTER_4:
+    SmoothFilter_8888((uint32*)src, srcwidth, srcheight, (uint32*)dest, (filter & SMOOTH_FILTER_MASK));
+    return;
+  case SHARP_FILTER_1:
+  case SHARP_FILTER_2:
+    SharpFilter_8888((uint32*)src, srcwidth, srcheight, (uint32*)dest, (filter & SHARP_FILTER_MASK));
+    return;
+  }
+}