April 2013
Intermediate to advanced
382 pages
11h 42m
English
Content preview from GPU Pro 4
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5. Coherence-Enhancing Filtering on the GPU 247
enum minmax_t { MIN_FLT , MAX_FLT };
struct minmax_impl_t {
float2 uv_;
float2 p_ ;
float v_ ;
__device__ minmax_impl_t(float2 uv ) {
uv_ = p_= uv;
v_ = tex2D ( texL , uv .x , uv .y );
}
template < minmax_t T>
__device__ void add( float2 p) {
float L=tex2D (texL , p .x , p .y );
if ((T == MAX_FLT ) && (L > v_)) {
p_=p;
v_=L;
}
if ((T == MIN_FLT ) && (L < v_)) {
p_=p;
v_=L;
}
}
template < minmax_t T>
__device__ void run( float2 n, float radius ) {
float ds ;
float2 dp ;
float2 nabs = fabs(n );
if ( nabs.x > nabs.y) {
ds = 1.0 f / nabs.x;
dp = make_float2(0, 0.5f - 1e -3);
} else {
ds = 1.0 f / nabs.y;
dp = make_float2(0.5f -
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