Glide Plugin GLES2 port from mupen64plus-ae, but with special FrameSkip code

[mupen64plus-pandora.git] / source / gles2glide64 / src / GlideHQ / TextureFilters_2xsai.h

diff --git a/source/gles2glide64/src/GlideHQ/TextureFilters_2xsai.h b/source/gles2glide64/src/GlideHQ/TextureFilters_2xsai.h
new file mode 100644 (file)
index 0000000..f6696ae
--- /dev/null
+++ b/source/gles2glide64/src/GlideHQ/TextureFilters_2xsai.h
@@ -0,0 +1,145 @@
+/*
+ * Texture Filtering
+ * Version:  1.0
+ *
+ * Copyright (C) 2007  Hiroshi Morii   All Rights Reserved.
+ * Email koolsmoky(at)users.sourceforge.net
+ * Web   http://www.3dfxzone.it/koolsmoky
+ *
+ * this 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, or (at your option)
+ * any later version.
+ *
+ * this 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 GNU Make; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Based on Derek Liauw Kie Fa and Rice1964 Super2xSaI code */
+
+  int row0, row1, row2, row3;
+  int col0, col1, col2, col3;
+
+  uint16 x;
+  uint16 y;
+
+  for (y = 0; y < height; y++) {
+    if ((y > 0) && (y < height - 1)) {
+      row0 = width;
+      row0 = -row0;
+      row1 = 0;
+      row2 = width;
+      row3 = (y == height - 2 ? width : width << 1);
+    } else {
+      row0 = 0;
+      row1 = 0;
+      row2 = 0;
+      row3 = 0;
+    }
+
+    for (x = 0; x < width; x++) {
+//--------------------------------------- B0 B1 B2 B3
+//                                         4  5  6 S2
+//                                         1  2  3 S1
+//                                        A0 A1 A2 A3
+      if ((x > 0) && (x < width - 1)) {
+        col0 = -1;
+        col1 = 0;
+        col2 = 1;
+        col3 = (x == width - 2 ? 1 : 2);
+      } else {
+        col0 = 0;
+        col1 = 0;
+        col2 = 0;
+        col3 = 0;
+      }
+
+      colorB0 = *(srcPtr + col0 + row0);
+      colorB1 = *(srcPtr + col1 + row0);
+      colorB2 = *(srcPtr + col2 + row0);
+      colorB3 = *(srcPtr + col3 + row0);
+
+      color4 = *(srcPtr + col0 + row1);
+      color5 = *(srcPtr + col1 + row1);
+      color6 = *(srcPtr + col2 + row1);
+      colorS2 = *(srcPtr + col3 + row1);
+
+      color1 = *(srcPtr + col0 + row2);
+      color2 = *(srcPtr + col1 + row2);
+      color3 = *(srcPtr + col2 + row2);
+      colorS1 = *(srcPtr + col3 + row2);
+
+      colorA0 = *(srcPtr + col0 + row3);
+      colorA1 = *(srcPtr + col1 + row3);
+      colorA2 = *(srcPtr + col2 + row3);
+      colorA3 = *(srcPtr + col3 + row3);
+
+//--------------------------------------
+      if (color2 == color6 && color5 != color3)
+        product2b = product1b = color2;
+      else if (color5 == color3 && color2 != color6)
+        product2b = product1b = color5;
+      else if (color5 == color3 && color2 == color6) {
+        int r = 0;
+
+        r += GET_RESULT(color6, color5, color1, colorA1);
+        r += GET_RESULT(color6, color5, color4, colorB1);
+        r += GET_RESULT(color6, color5, colorA2, colorS1);
+        r += GET_RESULT(color6, color5, colorB2, colorS2);
+
+        if (r > 0)
+          product2b = product1b = color6;
+        else if (r < 0)
+          product2b = product1b = color5;
+        else
+          product2b = product1b = SAI_INTERPOLATE(color5, color6);
+
+      } else {
+
+        if (color6 == color3 && color3 == colorA1 && color2 != colorA2 && color3 != colorA0)
+          product2b = SAI_Q_INTERPOLATE(color3, color3, color3, color2);
+        else if (color5 == color2 && color2 == colorA2 && colorA1 != color3 && color2 != colorA3)
+          product2b = SAI_Q_INTERPOLATE(color2, color2, color2, color3);
+        else
+          product2b = SAI_INTERPOLATE(color2, color3);
+
+        if (color6 == color3 && color6 == colorB1 && color5 != colorB2 && color6 != colorB0)
+          product1b = SAI_Q_INTERPOLATE(color6, color6, color6, color5);
+        else if (color5 == color2 && color5 == colorB2 && colorB1 != color6 && color5 != colorB3)
+          product1b = SAI_Q_INTERPOLATE(color6, color5, color5, color5);
+        else
+          product1b = SAI_INTERPOLATE(color5, color6);
+      }
+
+      if (color5 == color3 && color2 != color6 && color4 == color5 && color5 != colorA2)
+        product2a = SAI_INTERPOLATE(color2, color5);
+      else if (color5 == color1 && color6 == color5 && color4 != color2 && color5 != colorA0)
+        product2a = SAI_INTERPOLATE(color2, color5);
+      else
+        product2a = color2;
+
+      if (color2 == color6 && color5 != color3 && color1 == color2 && color2 != colorB2)
+        product1a = SAI_INTERPOLATE(color2, color5);
+      else if (color4 == color2 && color3 == color2 && color1 != color5 && color2 != colorB0)
+        product1a = SAI_INTERPOLATE(color2, color5);
+      else
+        product1a = color5;
+
+
+      destPtr[0] = product1a;
+      destPtr[1] = product1b;
+      destPtr[destWidth] = product2a;
+      destPtr[destWidth + 1] = product2b;
+
+      srcPtr++;
+      destPtr += 2;
+    }
+    srcPtr += (pitch-width);
+    destPtr += (((pitch-width)<<1)+(pitch<<1));
+  }