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authorLudvig Strigeus2002-04-12 10:35:29 +0000
committerLudvig Strigeus2002-04-12 10:35:29 +0000
commitb195bb597c32384bf4ce6f9c22ffc281c0828ca4 (patch)
treed3d8619b9fd72cd00f233746039f4184782a455c
parent3a4fa636ee4eaeee6bd50d6fcdedf4c3306318b0 (diff)
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put 2xsai filter in a separate file
svn-id: r3911
-rw-r--r--2xsai.cpp714
1 files changed, 714 insertions, 0 deletions
diff --git a/2xsai.cpp b/2xsai.cpp
new file mode 100644
index 0000000000..abfb01d052
--- /dev/null
+++ b/2xsai.cpp
@@ -0,0 +1,714 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001 Ludvig Strigeus
+ * Copyright (C) 2001/2002 The ScummVM project
+ *
+ * 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.
+ *
+ * $Header$
+ *
+ */
+
+#include "stdafx.h"
+#include "scummsys.h"
+
+/********** 2XSAI Filter *****************/
+static uint32 colorMask = 0xF7DEF7DE;
+static uint32 lowPixelMask = 0x08210821;
+static uint32 qcolorMask = 0xE79CE79C;
+static uint32 qlowpixelMask = 0x18631863;
+static uint32 redblueMask = 0xF81F;
+static uint32 greenMask = 0x7E0;
+
+int Init_2xSaI(uint32 BitFormat)
+{
+ if (BitFormat == 565) {
+ colorMask = 0xF7DEF7DE;
+ lowPixelMask = 0x08210821;
+ qcolorMask = 0xE79CE79C;
+ qlowpixelMask = 0x18631863;
+ redblueMask = 0xF81F;
+ greenMask = 0x7E0;
+ } else if (BitFormat == 555) {
+ colorMask = 0x7BDE7BDE;
+ lowPixelMask = 0x04210421;
+ qcolorMask = 0x739C739C;
+ qlowpixelMask = 0x0C630C63;
+ redblueMask = 0x7C1F;
+ greenMask = 0x3E0;
+ } else {
+ return 0;
+ }
+
+ return 1;
+}
+
+static 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;
+}
+
+static 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;
+}
+
+static inline int GetResult(uint32 A, uint32 B, uint32 C, uint32 D)
+{
+ 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;
+}
+
+static inline uint32 INTERPOLATE(uint32 A, uint32 B)
+{
+ if (A != B) {
+ return (((A & colorMask) >> 1) + ((B & colorMask) >> 1) +
+ (A & B & lowPixelMask));
+ } else
+ return A;
+}
+
+static inline uint32 Q_INTERPOLATE(uint32 A, uint32 B, uint32 C, uint32 D)
+{
+ 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;
+}
+
+#define BLUE_MASK565 0x001F001F
+#define RED_MASK565 0xF800F800
+#define GREEN_MASK565 0x07E007E0
+
+#define BLUE_MASK555 0x001F001F
+#define RED_MASK555 0x7C007C00
+#define GREEN_MASK555 0x03E003E0
+
+void Super2xSaI(uint8 *srcPtr, uint32 srcPitch,
+ uint8 *deltaPtr, uint8 *dstPtr, uint32 dstPitch,
+ int width, int height)
+{
+ uint16 *bP;
+ uint8 *dP;
+ uint32 inc_bP;
+
+ {
+ uint32 Nextline = srcPitch >> 1;
+ inc_bP = 1;
+
+ while (height--) {
+ bP = (uint16 *)srcPtr;
+ dP = (uint8 *)dstPtr;
+
+ for (uint32 finish = width; finish; finish -= inc_bP) {
+ uint32 color4, color5, color6;
+ uint32 color1, color2, color3;
+ uint32 colorA0, colorA1, colorA2, colorA3,
+ colorB0, colorB1, colorB2, colorB3, colorS1, colorS2;
+ uint32 product1a, product1b, product2a, product2b;
+
+//--------------------------------------- B1 B2
+// 4 5 6 S2
+// 1 2 3 S1
+// A1 A2
+
+ 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) {
+ register 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;
+
+ product1a = product1a | (product1b << 16);
+ product2a = product2a | (product2b << 16);
+
+ *((uint32 *)dP) = product1a;
+ *((uint32 *)(dP + dstPitch)) = product2a;
+
+ bP += inc_bP;
+ dP += sizeof(uint32);
+ } // end of for ( finish= width etc..)
+
+ srcPtr += srcPitch;
+ dstPtr += dstPitch * 2;
+ deltaPtr += srcPitch;
+ } // while (height--)
+ }
+}
+
+void SuperEagle(uint8 *srcPtr, uint32 srcPitch, uint8 *deltaPtr,
+ uint8 *dstPtr, uint32 dstPitch, int width, int height)
+{
+ uint8 *dP;
+ uint16 *bP;
+ uint32 inc_bP;
+
+ {
+ inc_bP = 1;
+
+ uint32 Nextline = srcPitch >> 1;
+
+ while (height--) {
+ bP = (uint16 *)srcPtr;
+ dP = dstPtr;
+ for (uint32 finish = width; finish; finish -= inc_bP) {
+ uint32 color4, color5, color6;
+ uint32 color1, color2, color3;
+ 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 == colorB2)) {
+ product1a = INTERPOLATE(color2, color5);
+ product1a = INTERPOLATE(color2, product1a);
+ } else {
+ product1a = INTERPOLATE(color5, color6);
+ }
+
+ if ((color6 == colorS2) || (color2 == colorA1)) {
+ product2b = INTERPOLATE(color2, color3);
+ product2b = INTERPOLATE(color2, product2b);
+ } else {
+ product2b = INTERPOLATE(color2, color3);
+ }
+ } else if (color5 == color3 && color2 != color6) {
+ product2b = product1a = color5;
+
+ if ((colorB1 == color5) || (color3 == colorS1)) {
+ product1b = INTERPOLATE(color5, color6);
+ product1b = INTERPOLATE(color5, product1b);
+ } else {
+ product1b = INTERPOLATE(color5, color6);
+ }
+
+ if ((color3 == colorA2) || (color4 == color5)) {
+ product2a = INTERPOLATE(color5, color2);
+ product2a = INTERPOLATE(color5, product2a);
+ } else {
+ product2a = INTERPOLATE(color2, color3);
+ }
+
+ } else if (color5 == color3 && color2 == color6) {
+ register 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 {
+ product2b = product1a = INTERPOLATE(color2, color6);
+ product2b = Q_INTERPOLATE(color3, color3, color3, product2b);
+ product1a = Q_INTERPOLATE(color5, color5, color5, product1a);
+
+ product2a = product1b = INTERPOLATE(color5, color3);
+ product2a = Q_INTERPOLATE(color2, color2, color2, product2a);
+ product1b = Q_INTERPOLATE(color6, color6, color6, product1b);
+ }
+ product1a = product1a | (product1b << 16);
+ product2a = product2a | (product2b << 16);
+
+ *((uint32 *)dP) = product1a;
+ *((uint32 *)(dP + dstPitch)) = product2a;
+
+ bP += inc_bP;
+ dP += sizeof(uint32);
+ } // end of for ( finish= width etc..)
+
+ srcPtr += srcPitch;
+ dstPtr += dstPitch * 2;
+ deltaPtr += srcPitch;
+ } // endof: while (height--)
+ }
+}
+
+void _2xSaI(uint8 *srcPtr, uint32 srcPitch, uint8 *deltaPtr,
+ uint8 *dstPtr, uint32 dstPitch, int width, int height)
+{
+ uint8 *dP;
+ uint16 *bP;
+ uint32 inc_bP;
+
+
+ {
+ inc_bP = 1;
+
+ uint32 Nextline = srcPitch >> 1;
+
+ while (height--) {
+ bP = (uint16 *)srcPtr;
+ dP = dstPtr;
+
+ for (uint32 finish = width; finish; finish -= inc_bP) {
+
+ 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);
+ }
+ }
+
+ product = colorA | (product << 16);
+ product1 = product1 | (product2 << 16);
+ *((int32 *) dP) = product;
+ *((uint32 *)(dP + dstPitch)) = product1;
+
+ bP += inc_bP;
+ dP += sizeof(uint32);
+ } // end of for ( finish= width etc..)
+
+ srcPtr += srcPitch;
+ dstPtr += dstPitch * 2;
+ deltaPtr += srcPitch;
+ } // endof: while (height--)
+ }
+}
+
+static uint32 Bilinear(uint32 A, uint32 B, uint32 x)
+{
+ unsigned long areaA, areaB;
+ unsigned long result;
+
+ if (A == B)
+ return A;
+
+ areaB = (x >> 11) & 0x1f; // reduce 16 bit fraction to 5 bits
+ areaA = 0x20 - areaB;
+
+ A = (A & redblueMask) | ((A & greenMask) << 16);
+ B = (B & redblueMask) | ((B & greenMask) << 16);
+
+ result = ((areaA * A) + (areaB * B)) >> 5;
+
+ return (result & redblueMask) | ((result >> 16) & greenMask);
+
+}
+
+static uint32 Bilinear4(uint32 A, uint32 B, uint32 C, uint32 D, uint32 x,
+ uint32 y)
+{
+ unsigned long areaA, areaB, areaC, areaD;
+ unsigned long result, xy;
+
+ x = (x >> 11) & 0x1f;
+ y = (y >> 11) & 0x1f;
+ xy = (x * y) >> 5;
+
+ A = (A & redblueMask) | ((A & greenMask) << 16);
+ B = (B & redblueMask) | ((B & greenMask) << 16);
+ C = (C & redblueMask) | ((C & greenMask) << 16);
+ D = (D & redblueMask) | ((D & greenMask) << 16);
+
+ areaA = 0x20 + xy - x - y;
+ areaB = x - xy;
+ areaC = y - xy;
+ areaD = xy;
+
+ result = ((areaA * A) + (areaB * B) + (areaC * C) + (areaD * D)) >> 5;
+
+ return (result & redblueMask) | ((result >> 16) & greenMask);
+}
+
+void Scale_2xSaI(uint8 *srcPtr, uint32 srcPitch, uint8 * /* deltaPtr */ ,
+ uint8 *dstPtr, uint32 dstPitch,
+ uint32 dstWidth, uint32 dstHeight, int width, int height)
+{
+ uint8 *dP;
+ uint16 *bP;
+
+ uint32 w;
+ uint32 h;
+ uint32 dw;
+ uint32 dh;
+ uint32 hfinish;
+ uint32 wfinish;
+
+ uint32 Nextline = srcPitch >> 1;
+
+ wfinish = (width - 1) << 16; // convert to fixed point
+ dw = wfinish / (dstWidth - 1);
+ hfinish = (height - 1) << 16; // convert to fixed point
+ dh = hfinish / (dstHeight - 1);
+
+ for (h = 0; h < hfinish; h += dh) {
+ uint32 y1, y2;
+
+ y1 = h & 0xffff; // fraction part of fixed point
+ bP = (uint16 *)(srcPtr + ((h >> 16) * srcPitch));
+ dP = dstPtr;
+ y2 = 0x10000 - y1;
+
+ w = 0;
+
+ for (; w < wfinish;) {
+ uint32 A, B, C, D;
+ uint32 E, F, G, H;
+ uint32 I, J, K, L;
+ uint32 x1, x2, a1, f1, f2;
+ uint32 position, product1;
+
+ position = w >> 16;
+ A = bP[position]; // current pixel
+ B = bP[position + 1]; // next pixel
+ C = bP[position + Nextline];
+ D = bP[position + Nextline + 1];
+ E = bP[position - Nextline];
+ F = bP[position - Nextline + 1];
+ G = bP[position - 1];
+ H = bP[position + Nextline - 1];
+ I = bP[position + 2];
+ J = bP[position + Nextline + 2];
+ K = bP[position + Nextline + Nextline];
+ L = bP[position + Nextline + Nextline + 1];
+
+ x1 = w & 0xffff; // fraction part of fixed point
+ x2 = 0x10000 - x1;
+
+ /*0 */
+ if (A == B && C == D && A == C)
+ product1 = A;
+ else
+ /*1 */
+ if (A == D && B != C) {
+ f1 = (x1 >> 1) + (0x10000 >> 2);
+ f2 = (y1 >> 1) + (0x10000 >> 2);
+ if (y1 <= f1 && A == J && A != E) // close to B
+ {
+ a1 = f1 - y1;
+ product1 = Bilinear(A, B, a1);
+ } else if (y1 >= f1 && A == G && A != L) // close to C
+ {
+ a1 = y1 - f1;
+ product1 = Bilinear(A, C, a1);
+ } else if (x1 >= f2 && A == E && A != J) // close to B
+ {
+ a1 = x1 - f2;
+ product1 = Bilinear(A, B, a1);
+ } else if (x1 <= f2 && A == L && A != G) // close to C
+ {
+ a1 = f2 - x1;
+ product1 = Bilinear(A, C, a1);
+ } else if (y1 >= x1) // close to C
+ {
+ a1 = y1 - x1;
+ product1 = Bilinear(A, C, a1);
+ } else if (y1 <= x1) // close to B
+ {
+ a1 = x1 - y1;
+ product1 = Bilinear(A, B, a1);
+ }
+ } else
+ /*2 */
+ if (B == C && A != D) {
+ f1 = (x1 >> 1) + (0x10000 >> 2);
+ f2 = (y1 >> 1) + (0x10000 >> 2);
+ if (y2 >= f1 && B == H && B != F) // close to A
+ {
+ a1 = y2 - f1;
+ product1 = Bilinear(B, A, a1);
+ } else if (y2 <= f1 && B == I && B != K) // close to D
+ {
+ a1 = f1 - y2;
+ product1 = Bilinear(B, D, a1);
+ } else if (x2 >= f2 && B == F && B != H) // close to A
+ {
+ a1 = x2 - f2;
+ product1 = Bilinear(B, A, a1);
+ } else if (x2 <= f2 && B == K && B != I) // close to D
+ {
+ a1 = f2 - x2;
+ product1 = Bilinear(B, D, a1);
+ } else if (y2 >= x1) // close to A
+ {
+ a1 = y2 - x1;
+ product1 = Bilinear(B, A, a1);
+ } else if (y2 <= x1) // close to D
+ {
+ a1 = x1 - y2;
+ product1 = Bilinear(B, D, a1);
+ }
+ }
+ /*3 */
+ else {
+ product1 = Bilinear4(A, B, C, D, x1, y1);
+ }
+
+//end First Pixel
+ *(uint32 *)dP = product1;
+ dP += 2;
+ w += dw;
+ }
+ dstPtr += dstPitch;
+ }
+}