ssize_t handle_wstr(char **format, va_list *args, t_arg *arg)
{
wchar_t *str;
size_t strlen;
(void)format;
(void)arg;
str = va_arg(*args, wchar_t*);
if (str == NULL)
str = L"(null)";
strlen = arg->got_precision ? calc_wstrlen(str, arg->precision, 0) :
ft_wstrlen(str);
if (arg->got_width && !arg->right_pad)
width_pad(strlen, arg->width, arg->pad_zeroes ? '0' : ' ');
ft_putnwstr(str, strlen);
if (arg->got_width && arg->right_pad)
width_pad(strlen, arg->width, ' ');
return (arg->got_width ? FT_MAX(strlen, arg->width) : strlen);
}
ssize_t handle_str(char **format, va_list *args, t_arg *arg)
{
char *str;
size_t strlen;
if (arg->length == l)
return (handle_wstr(format, args, arg));
else
{
str = va_arg(*args, char*);
if (str == NULL)
str = "(null)";
strlen = arg->got_precision ? ft_nstrlen(str, arg->precision) :
ft_strlen(str);
if (arg->got_width && !arg->right_pad)
width_pad(strlen, arg->width, arg->pad_zeroes ? '0' : ' ', arg);
ft_putnstr(str, strlen);
if (arg->got_width && arg->right_pad)
width_pad(strlen, arg->width, ' ', arg);
return (arg->got_width ? ft_max(strlen, arg->width) : strlen);
}
}
ssize_t handle_wchar(char **format, va_list *args, t_arg *arg)
{
wchar_t chr;
unsigned chr_len;
(void)format;
chr = (wchar_t)va_arg(*args, wint_t);
if (chr <= 0x7F)
chr_len = 1;
else if (chr <= 0x7FF)
chr_len = 2;
else if (chr <= 0xFFFF)
chr_len = 3;
else if (chr <= 0x10FFFF)
chr_len = 4;
else
chr_len = 0;
if (arg->got_width && !arg->right_pad)
width_pad(chr_len, arg->width, arg->pad_zeroes ? '0' : ' ', arg);
ft_putwchar(chr);
if (arg->got_width && arg->right_pad)
width_pad(chr_len, arg->width, arg->pad_zeroes ? '0' : ' ', arg);
return (arg->got_width ? ft_max(chr_len, arg->width) : chr_len);
}
void
stretch(u8** image, BMP_HEADER* p_header, u8* color_buf, int width, int height)
{
char flag_bilinear, char_test;
int i, j;
float x_ratio, y_ratio, x, y;
printf("Give a float ratio to X-stretch (must > 0)\n");
/*
* no matter whether it's a '\n' in input-buf, SCANF ignores it
* except SCANF needs %c
*/
scanf("%f", &x_ratio);
/* eat the '\n' which user has typed follow a useful num */
while ((char_test = getchar()) != '\n' && char_test != EOF) ;
printf("Give a float ratio to Y-stretch (must > 0)\n");
scanf("%f", &y_ratio);
while ((char_test = getchar()) != '\n' && char_test != EOF) ;
printf("Choose one algorithm\n"
"[a] -> adjacent pixel\n"
"[b] -> bilinear interposition\n");
__asm__ __volatile__("4:");
while ((char_test = getchar()) != '\n' && char_test != EOF) {
flag_bilinear = char_test;
/* not *++bp, bp is a global-var */
*bp = '\n';
}
/* algorithm bilinear-interposition */
switch (flag_bilinear) {
case 'b':
flag_bilinear = 1;
break;
case 'a':
flag_bilinear = 0;
break;
default:
printf("Hey bro, type 'a' or 'b'\n");
__asm__ __volatile__("jmp 4b");
break;
}
int width_new = (int)(width * x_ratio);
int height_new = (int)(height * y_ratio);
u8* image_new[height_new];
width_pad(&width_new);
calloc_buf(image_new, width_new, height_new);
if (!flag_bilinear) {
int x_int, y_int;
for (i = 0; i < height_new; i++) {
y_int = (int)((float)i / y_ratio);
for (j = 0; j < width_new; j++) {
x_int = (int)((float)j / x_ratio);
if (x_int >= width)
/* why minus 1? see below */
x_int = width - 1;
if (y_int >= height)
y_int = height - 1;
/* here is the answer */
image_new[i][j] = image[y_int][x_int];
}
}
}
else {
for (i = 0; i < height_new; i++) {
y = ((float)i / y_ratio);
for (j = 0; j < width_new; j++) {
x = ((float)j / x_ratio);
if ((int)x >= width)
/* the same reason here */
x = width - 1;
if ((int)y >= height)
y = height - 1;
/* the same answer here */
image_new[i][j] = x - floor(x) || y - floor(y) ? \
bilinear_interposition(image, x, y, width, height) : \
image[(int)y][(int)x];
}
}
}
if (write_bmp_calloc(image_new, color_buf, width_new, height_new, p_header)) {
printf("Sorry, Stretch Failure!\n");
exit(EXIT_FAILURE);
}
free_buf(image_new, width_new, height_new);
printf("\nStretch Done!\tWhat's more?\n");
}
void
rotate(u8** image, BMP_HEADER* p_header, u8* color_buf, int width, int height)
{
char char_test;
int i, j, flag_rotate;
float angle, x, y;
printf("Give a rotate angle (whatever >0 or <0)\n");
scanf("%f", &angle);
while ((char_test = getchar()) != '\n' && char_test != EOF) ;
printf("Choose one algorithm\n"
"[a] -> adjacent pixel\n"
"[b] -> bilinear interposition\n");
__asm__ __volatile__("5:");
while ((char_test = getchar()) != '\n' && char_test != EOF) {
flag_rotate = char_test;
/* not *++bp, bp is a global-var */
*bp = '\n';
}
switch (flag_rotate) {
case 'b':
flag_rotate = 1;
break;
case 'a':
flag_rotate = 0;
break;
default:
printf("Hey bro, type 'a' or 'b'\n");
__asm__ __volatile__("jmp 5b");
break;
}
float radian = RADIAN(angle);
float sina = sin(radian);
float cosa = cos(radian);
/*
* y Original Image -- regard (x1, y1) as (0, 0)
*
* ^
* |
* |
* |
* |
* |(x2, y2) (x4, y4)
* ..................................
* . .
* . .
* . .
* . .
* . .
* .(x1, y1) -- axis . (x3, y3)
* ..................................----------> x */
/* after anti-clock-wise rotation */
float x1 = 0;
float x2 = 0 - height * sina;
float x3 = 0 + width * cosa;
float x4 = 0 + width * cosa - height * sina;
float y1 = 0;
float y2 = 0 + height * cosa;
float y3 = 0 + width * sina;
float y4 = 0 + width * sina + height * cosa;
/*
* make sure that the image always locate
* in active-x-axis'n active-y-axis
* so we need to know how far they get away
*/
float x_offset = MAX(MAX(-x2, -x3), -x4);
float y_offset = MAX(MAX(-y2, -y3), -y4);
x_offset = x_offset > 0 ? x_offset : 0;
y_offset = y_offset > 0 ? y_offset : 0;
int width_new = ceil(MAX(fabs(x1 - x4), fabs(x2 - x3)));
int height_new = ceil(MAX(fabs(y1 - y4), fabs(y2 - y3)));
u8* image_new[height_new];
/* fill up */
width_pad(&width_new);
/* everything for making a new image has done, now calloc */
calloc_buf(image_new, width_new, height_new);
/* control every pixels in image new, not image original */
for (i = 0; i < height_new; i++) {
for (j = 0; j < width_new; j++) {
/* it's image new here, so clock-wise */
x = ( (j - x_offset) * cosa + (i - y_offset) * sina);
y = (- (j - x_offset) * sina + (i - y_offset) * cosa);
/*
* if the pixel in image new has the corresponding pixel in
* image original, we evaluate it, other wise, next one
*/
/* no equals */
if (y >= 0 && y < height && x >= 0 && x < width) {
image_new[i][j] = flag_rotate ? \
bilinear_interposition(image, x, y, width, height) : \
image[(int)y][(int)x];
}
}
}
if (write_bmp_calloc(image_new, color_buf, width_new, height_new, p_header)) {
printf("Sorry, Failure!\n");
exit(EXIT_FAILURE);
}
free_buf(image_new, width_new, height_new);
printf("\nRotate Done!\tWhat's more?\n");
}