added thresholding to kernel and changed directories in hello-opengl.pro to that…

added thresholding to kernel and changed directories in hello-opengl.pro to that of lab - /usr and nvidia-331

miklos/project_integration_gui/hello-opengl.pro

@@ -14,14 +14,14 @@ CUDA_SOURCES += kernel.cu
 
 LIBS += -lGLEW -lcudart -lcuda -lopencv_core -lopencv_highgui -lopencv_imgproc
 
-QMAKE_LFLAGS += -Wl,-rpath,/usr/lib/nvidia-319-updates -Wl,-rpath,/usr/lib/nvidia-319-updates/tls
+QMAKE_LFLAGS += -Wl,-rpath,/usr/lib/nvidia-331-updates -Wl,-rpath,/usr/lib/nvidia-331-updates/tls
 # Path to cuda toolkit install
-CUDA_DIR      = /usr/local/cuda-5.5
+CUDA_DIR      = /usr
 
 # Path to header and libs files
 INCLUDEPATH  += $$CUDA_DIR/include
 QMAKE_LIBDIR += $$CUDA_DIR/lib64
-QMAKE_LIBDIR += /usr/lib/nvidia-319-updates /usr/lib/nvidia-319-updates/tls
+QMAKE_LIBDIR += /usr/lib/nvidia-331-updates /usr/lib/nvidia-331-updates/tls
 # GPU architecture
 CUDA_ARCH     = sm_10
 NVCCFLAGS     = --compiler-options -use_fast_math --ptxas-options=-v

miklos/project_integration_gui/kernel.cu

@@ -85,14 +85,15 @@ __global__ void update_Output(uchar4* output, float *U, int w, int h) {
 
     int x = threadIdx.x + blockDim.x * blockIdx.x;
     int y = threadIdx.y + blockDim.y * blockIdx.y;
-    size_t i = x + (size_t)w*y;
-    size_t idx = x + (size_t) w*(h-1 - y);
-    unsigned char temp_res = roundf((U[i] * 255.f));
-    output[idx].x = temp_res;
-    output[idx].y = temp_res;
-    output[idx].z = temp_res;
-    output[idx].w = 255;
-
+    if( x < w && y < h ) {
+        size_t i = x + (size_t)w*y;
+        size_t idx = x + (size_t) w*(h-1 - y);
+        unsigned char temp_res = int(U[i] + 0.5f) * 255;
+        output[idx].x = temp_res;
+        output[idx].y = temp_res;
+        output[idx].z = temp_res;
+        output[idx].w = 255;
+    }
 }
 
 inline int div_ceil(int n, int b) { return (n + b - 1) / b; }