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Add --transparent option for background-less rendering #65

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Add --transparent option for background-less rendering #65

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14 changes: 13 additions & 1 deletion src/nyancat.c
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Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,11 @@ int telnet = 0;
*/
int show_counter = 1;

/*
* Enable transparent background
*/
int transparent_bg = 0;

/*
* Number of frames to show before quitting
* or 0 to repeat forever (default)
Expand Down Expand Up @@ -335,6 +340,7 @@ void usage(char * argv[]) {
" -n --no-counter \033[3mDo not display the timer\033[0m\n"
" -s --no-title \033[3mDo not set the titlebar text\033[0m\n"
" -e --no-clear \033[3mDo not clear the display between frames\033[0m\n"
" -T --transparent\033[3mRender with transparent background\033[0m\n"
" -d --delay \033[3mDelay image rendering by anywhere between 10ms and 1000ms\n"
" -f --frames \033[3mDisplay the requested number of frames, then quit\033[0m\n"
" -r --min-rows \033[3mCrop the animation from the top\033[0m\n"
Expand Down Expand Up @@ -369,6 +375,7 @@ int main(int argc, char ** argv) {
{"skip-intro", no_argument, 0, 'I'},
{"no-counter", no_argument, 0, 'n'},
{"no-title", no_argument, 0, 's'},
{"transparent",no_argument, 0, 'T'},
{"no-clear", no_argument, 0, 'e'},
{"delay", required_argument, 0, 'd'},
{"frames", required_argument, 0, 'f'},
Expand All @@ -386,7 +393,7 @@ int main(int argc, char ** argv) {

/* Process arguments */
int index, c;
while ((c = getopt_long(argc, argv, "eshiItnd:f:r:R:c:C:W:H:", long_opts, &index)) != -1) {
while ((c = getopt_long(argc, argv, "eshiItTnd:f:r:R:c:C:W:H:", long_opts, &index)) != -1) {
if (!c) {
if (long_opts[index].flag == 0) {
c = long_opts[index].val;
Expand Down Expand Up @@ -415,6 +422,9 @@ int main(int argc, char ** argv) {
case 'n':
show_counter = 0;
break;
case 'T':
transparent_bg = 1;
break;
case 'd':
if (10 <= atoi(optarg) && atoi(optarg) <= 1000)
delay_ms = atoi(optarg);
Expand Down Expand Up @@ -768,6 +778,8 @@ int main(int argc, char ** argv) {
break;
}

if (transparent_bg && ttype != 6 && ttype != 7) colors[','] = "\033[49m";

if (min_col == max_col) {
min_col = (FRAME_WIDTH - terminal_width/2) / 2;
max_col = (FRAME_WIDTH + terminal_width/2) / 2;
Expand Down