alphablending.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

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Macros
#define	xmalloc(p)

Functions
void	alphablending (unsigned int n, float src1[n], float src2[n], float result[n], float alpha)
int	main (int argc, char **argv)

Macro Definition Documentation

xmalloc

#define xmalloc

(

p

)

Value:

        do {                                                            \
                if (posix_memalign((void **) &p, 32, n * sizeof(float))) \
                        return 3;                                       \
        } while(0);

Function Documentation

alphablending()

void alphablending	(	unsigned int	n,
		float	src1[n],
		float	src2[n],
		float	result[n],
		float	alpha
	)

Definition at line 46 of file alphablending.c.

{
    unsigned int i,j;
    for(i=0;i<n;i++)
        result[i]=alpha*src1[i]+(1-alpha)*src2[i];
}

Referenced by main().

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main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 8 of file alphablending.c.

{
        unsigned int n;
        int r;
        float *src1, *src2, *result;
        float alpha;
        n = atoi(argv[1]);
        printf(">>>> %d <<<<\n", n);
        alpha = 0.7;
 
#define xmalloc(p)                                                      \
        do {                                                            \
                if (posix_memalign((void **) &p, 32, n * sizeof(float))) \
                        return 3;                                       \
        } while(0);
 
        xmalloc(src1);
        xmalloc(src2);
        xmalloc(result);
 
        init_data_file(argv[2]);
        init_data_float(src1, n);
        init_data_float(src2, n);
        close_data_file();
 
        alphablending(n, src1, src2, result, alpha);
 
        print_array_float("result", result, n);
 
        free(src1);
        free(src2);
 
        r = (int) (result[0] + result[n - 1]);
        free(result);
 
        return 0;
}

References alphablending(), close_data_file(), free(), init_data_file(), init_data_float(), int, print_array_float(), printf(), and xmalloc.

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