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make_brush_stroke.c
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make_brush_stroke.c
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#include "header.h"
void make_brush_stroke(
int *rgb_image_arr,
int width,
int height,
int origin_x,
int origin_y,
int brush_radius,
int brush_stroke_color[3],
double *pxc,
double *pyc,
double *ptheta,
double *prectw,
double *prectl,
int *perr_flag
)
/*
rgb_image_arr is the local reference image
(a cropped version of the reference image)
(width,height) are the dimensions of the local reference image
(origin_x,origin_y) is the origin (top-left corner) of the local reference image
*/
{
double *difference_image_arr;
double xc;
double yc;
double theta;
double rectw;
double rectl;
int debug_flag= 0;
int *normalized_difference_image_arr;
int pixel;
int i;
int j;
double temp_dbl;
int temp_int;
int err_flag;
err_flag= 0;
xc= 0.0;
yc= 0.0;
theta= 0.0;
rectw= 0.0;
rectl= 0.0;
/*
Compute the difference image
*/
/*
compute_difference_image_shiraishi(
rgb_image_arr,
width,
height,
brush_stroke_color,
&difference_image_arr
);
*/
compute_difference_image_shiraishi_2(
rgb_image_arr,
width,
height,
brush_stroke_color,
&difference_image_arr
);
if ( debug_flag == 1 ) {
/*
Print the difference image
*/
normalized_difference_image_arr= (int *)calloc(width*height,sizeof(int));
for ( i= 0 ; i< height ; i++ ) {
for ( j= 0 ; j< width ; j++ ) {
pixel= i*width+j;
temp_dbl= difference_image_arr[pixel]*255.0;
temp_int= (int)round(temp_dbl);
normalized_difference_image_arr[pixel]= temp_int;
}
}
err_flag= write_image(
(char *)"normalized_difference_image.png",
normalized_difference_image_arr,
width,
height
);
if ( err_flag == 1 ) {
error_handler((char *)"paint_canvas_layer");
}
free(normalized_difference_image_arr);
}
/*
Compute the equivalent rectangle
*/
compute_equivalent_rectangle(
difference_image_arr,
width,
height,
&xc,
&yc,
&theta,
&rectw,
&rectl,
&err_flag
);
if ( err_flag == 1 ) {
/*
We could not get the equivalent rectangle
Let's forget about making the brush stroke
*/
goto END;
}
END:
/*
Free difference_image_arr
*/
free(difference_image_arr);
(*pxc)= xc;
(*pyc)= yc;
(*ptheta)= theta;
(*prectw)= rectw;
(*prectl)= rectl;
(*perr_flag)= err_flag;
}