1 /* 2 // block of defines matching what RS will insert at runtime. 3 struct Params_s{ 4 int inHeight; 5 int inWidth; 6 int outHeight; 7 int outWidth; 8 float threshold; 9 }; 10 struct Params_s * Params; 11 struct InPixel_s{ 12 char a; 13 char b; 14 char g; 15 char r; 16 }; 17 struct InPixel_s * InPixel; 18 struct OutPixel_s{ 19 char a; 20 char b; 21 char g; 22 char r; 23 }; 24 struct OutPixel_s * OutPixel; 25 */ 26 27 struct color_s { 28 char b; 29 char g; 30 char r; 31 char a; 32 }; 33 34 void main() { 35 int t = uptimeMillis(); 36 37 struct color_s *in = (struct color_s *) InPixel; 38 struct color_s *out = (struct color_s *) OutPixel; 39 40 int count = Params->inWidth * Params->inHeight; 41 int i; 42 float threshold = (Params->threshold * 255.f); 43 44 for (i = 0; i < count; i++) { 45 float luminance = 0.2125f * in->r + 46 0.7154f * in->g + 47 0.0721f * in->b; 48 if (luminance > threshold) { 49 *out = *in; 50 } else { 51 *((int *)out) = *((int *)in) & 0xff000000; 52 } 53 54 in++; 55 out++; 56 } 57 58 t= uptimeMillis() - t; 59 debugI32("Filter time", t); 60 61 sendToClient(&count, 1, 4, 0); 62 } 63
