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cat-img should support scaling to terminal width

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This commit is contained in:
K. Lange 2018-07-17 22:15:20 +09:00
parent 60accf8088
commit 799ec420ac
1 changed files with 17 additions and 1 deletions
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18
apps/cat-img.c
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@ -46,6 +46,7 @@ int usage(char * argv[]) {
"\n"
" -n \033[3mdon't print a new line after image\033[0m\n"
" -s \033[3mscale to cell height (up or down)\033[0m\n"
" -w \033[3mscale to terminal width (up or down)\033[0m\n"
" -? \033[3mshow this help text\033[0m\n"
"\n", argv[0]);
return 1;
@ -60,14 +61,18 @@ int main (int argc, char * argv[]) {
int opt;
int no_newline = 0;
int scale_to_cell_height = 0;
int scale_to_term_width = 0;
while ((opt = getopt(argc, argv, "?ns")) != -1) {
while ((opt = getopt(argc, argv, "?nsw")) != -1) {
switch (opt) {
case '?':
return usage(argv);
case 'n':
no_newline = 1;
break;
case 'w':
scale_to_term_width = 1;
break;
case 's':
scale_to_cell_height = 1;
break;
@ -99,6 +104,17 @@ int main (int argc, char * argv[]) {
sprite_free(image);
}
if (scale_to_term_width) {
struct winsize w;
ioctl(0, TIOCGWINSZ, &w);
int new_height = (w.ws_xpixel * image->height) / image->width;
source = create_sprite(w.ws_xpixel, new_height, 1);
gfx_context_t * g = init_graphics_sprite(source);
draw_fill(g, 0x00000000);
draw_sprite_scaled(g, image, 0, 0, w.ws_xpixel, new_height);
sprite_free(image);
}
int width_in_cells = source->width / w;
if (source->width % w) width_in_cells++;