Initial community commit

Src/Wasabi/bfc/draw/convolve.cpp

@@ -0,0 +1,60 @@
+#include <precomp.h>
+
+#include "convolve.h"
+
+#define RED(a) (((a)>>16)&0xff)
+#define GRN(a) (((a)>>8)&0xff)
+#define BLU(a) (((a)&0xff))
+#define ALP(a) (((a)>>24))
+
+Convolve3x3::Convolve3x3(ARGB32 *_bits, int _w, int _h) : bits(_bits), w(_w), h(_h) {
+  ZERO(vals);
+  multiplier = 0;
+}
+
+void Convolve3x3::setPos(int x, int y, float v) {
+  ASSERT(x >= -1 && x <= 1 && y >= -1 && y <= 1);
+  vals[y+1][x+1] = v;
+}
+
+void Convolve3x3::setMultiplier(int m) {
+  multiplier = m;
+}
+
+void Convolve3x3::convolve() {
+  if (bits == NULL || w <= 0 || h <= 0) return;	// nothin'
+  MemMatrix<ARGB32> temp(w, h, bits);	// make a copy
+  for (int y = 0; y < h; y++) {
+    for (int x = 0; x < w; x++) {
+      if (ALP(temp(x, y))<=1) continue;
+      float ra=0, rg=0, rb=0;
+      for (int a = -1; a <= 1; a++) {
+        for (int b = -1; b <= 1; b++) {
+          int px = x + a, py = y + b;
+          if (px < 0 || px >= w || py < 0 || py >= h) continue;
+          ARGB32 c = temp(px, py);
+          if (ALP(c) <= 1) continue;
+          ra += (float)RED(c) * vals[b][a] * multiplier;
+          rg += (float)GRN(c) * vals[b][a] * multiplier;
+          rb += (float)BLU(c) * vals[b][a] * multiplier;
+        }
+      } 
+      unsigned int r = MINMAX((int)ra, 0, 255);
+      unsigned int g = MINMAX((int)rg, 0, 255);
+      unsigned int b = MINMAX((int)rb, 0, 255);
+      unsigned int lum = MAX(MAX(r, g), b);
+if (lum < 64) lum = 0;
+else if (lum > 192) lum = 255;
+      //bits[x+y*w] = (ALP(*temp.m(x, y))<<24)|(r<<16)|(g<<8)|(b);
+      bits[x+y*w] &= 0xffffff;
+      bits[x+y*w] |= (255-lum) << 24;
+//if (lum < 64) {
+//      bits[x+y*w] &= 0xffff00ff;
+//      bits[x+y*w] |= lum << 8;
+//} else {
+//      bits[x+y*w] &= 0xff00ffff;
+//      bits[x+y*w] |= lum << 16;
+//}
+    }
+  }
+}