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[ncplayer] add -a option for alpha channel #1518

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pull/1521/head
nick black 3 years ago committed by Nick Black
parent 76241f81d2
commit fada4148b5
2 changed files with 28 additions and 11 deletions
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4
doc/man/man1/ncplayer.1.md
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@ -8,7 +8,7 @@ ncplayer - Render images and video to a terminal
# SYNOPSIS
**ncplayer** [**-h**] [**-V**] [**-q**] [**-d** ***delaymult***] [**-l** ***loglevel***] [**-b** ***blitter***] [**-s** ***scalemode***] [**-k**] [**-L**] [**-t** ***seconds***] files
**ncplayer** [**-h**] [**-V**] [**-q**] [**-d** ***delaymult***] [**-l** ***loglevel***] [**-b** ***blitter***] [**-s** ***scalemode***] [**-k**] [**-L**] [**-t** ***seconds***] [**-a**] files
# DESCRIPTION
@ -41,6 +41,8 @@ be any non-negative number.
**-q**: Print neither frame/timing information along the top of the screen, nor the output summary on exit.
**-a**: Treat color 0x000000 as if it were transparent.
**-V**: Print the program name and version, and exit with success.
**-h**: Print help information, and exit with success.

35
src/player/play.cpp
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@ -19,7 +19,7 @@ static void usage(std::ostream& os, const char* name, int exitcode)
__attribute__ ((noreturn));
void usage(std::ostream& o, const char* name, int exitcode){
o << "usage: " << name << " [ -h ] [ -q ] [ -m margins ] [ -l loglevel ] [ -d mult ] [ -s scaletype ] [ -k ] [ -L ] [ -t seconds ] files" << '\n';
o << "usage: " << name << " [ -h ] [ -q ] [ -m margins ] [ -l loglevel ] [ -d mult ] [ -s scaletype ] [ -k ] [ -L ] [ -t seconds ] [ -a ] files" << '\n';
o << " -h: display help and exit with success\n";
o << " -V: print program name and version\n";
o << " -q: be quiet (no frame/timing information along top of screen)\n";
@ -30,6 +30,7 @@ void usage(std::ostream& o, const char* name, int exitcode){
o << " -s scaling: one of 'none', 'hires', 'scale', 'scalehi', or 'stretch'\n";
o << " -b blitter: one of 'ascii', 'half', 'quad', 'sex', 'braille', or 'pixel'\n";
o << " -m margins: margin, or 4 comma-separated margins\n";
o << " -a: replace color 0x000000 with a transparent channel\n";
o << " -d mult: non-negative floating point scale for frame time" << std::endl;
exit(exitcode);
}
@ -183,13 +184,13 @@ auto perframe(struct ncvisual* ncv, struct ncvisual_options* vopts,
// can exit() directly. returns index in argv of first non-option param.
auto handle_opts(int argc, char** argv, notcurses_options& opts, bool* quiet,
float* timescale, ncscale_e* scalemode, ncblitter_e* blitter,
float* displaytime, bool* loop)
float* displaytime, bool* loop, uint32_t* transcolor)
-> int {
*timescale = 1.0;
*scalemode = NCSCALE_STRETCH;
*displaytime = -1;
int c;
while((c = getopt(argc, argv, "Vhql:d:s:b:t:m:kL")) != -1){
while((c = getopt(argc, argv, "Vhql:d:s:b:t:m:kLa")) != -1){
switch(c){
case 'h':
usage(std::cout, argv[0], EXIT_SUCCESS);
@ -197,6 +198,13 @@ auto handle_opts(int argc, char** argv, notcurses_options& opts, bool* quiet,
case 'V':
printf("ncplayer version %s\n", notcurses_version());
exit(EXIT_SUCCESS);
case 'a':
if(*transcolor){
std::cerr << "Provided -a twice!" << std::endl;
usage(std::cerr, argv[0], EXIT_FAILURE);
}
*transcolor = 0x1000000ull;
break;
case 'q':
*quiet = true;
break;
@ -337,7 +345,8 @@ int direct_mode_player(int argc, char** argv, ncscale_e scalemode,
int rendered_mode_player_inner(NotCurses& nc, int argc, char** argv,
ncscale_e scalemode, ncblitter_e blitter,
bool quiet, bool loop,
double timescale, double displaytime){
double timescale, double displaytime,
uint32_t transcolor){
int dimy, dimx;
std::unique_ptr<Plane> stdn(nc.get_stdplane(&dimy, &dimx));
uint64_t transchan = 0;
@ -360,8 +369,11 @@ int rendered_mode_player_inner(NotCurses& nc, int argc, char** argv,
ncv = std::make_unique<Visual>(argv[i]);
struct ncvisual_options vopts{};
int r;
vopts.flags |= NCVISUAL_OPTION_HORALIGNED | NCVISUAL_OPTION_VERALIGNED
| NCVISUAL_OPTION_ADDALPHA;
vopts.flags |= NCVISUAL_OPTION_HORALIGNED | NCVISUAL_OPTION_VERALIGNED;
if(transcolor){
vopts.flags |= NCVISUAL_OPTION_ADDALPHA;
}
vopts.transcolor = transcolor & 0xffffffull;
vopts.y = NCALIGN_CENTER;
vopts.x = NCALIGN_CENTER;
vopts.n = n;
@ -431,7 +443,8 @@ int rendered_mode_player_inner(NotCurses& nc, int argc, char** argv,
int rendered_mode_player(int argc, char** argv, ncscale_e scalemode,
ncblitter_e blitter, notcurses_options& ncopts,
bool quiet, bool loop,
double timescale, double displaytime){
double timescale, double displaytime,
uint32_t transcolor){
// no -k, we're using full rendered mode (and the alternate screen).
ncopts.flags |= NCOPTION_INHIBIT_SETLOCALE;
if(quiet){
@ -446,7 +459,8 @@ int rendered_mode_player(int argc, char** argv, ncscale_e scalemode,
return EXIT_FAILURE;
}
r = rendered_mode_player_inner(nc, argc, argv, scalemode, blitter,
quiet, loop, timescale, displaytime);
quiet, loop, timescale, displaytime,
transcolor);
if(!nc.stop()){
return -1;
}
@ -469,10 +483,11 @@ auto main(int argc, char** argv) -> int {
ncscale_e scalemode;
notcurses_options ncopts{};
ncblitter_e blitter = NCBLIT_DEFAULT;
uint32_t transcolor = 0;
bool quiet = false;
bool loop = false;
auto nonopt = handle_opts(argc, argv, ncopts, &quiet, &timescale, &scalemode,
&blitter, &displaytime, &loop);
&blitter, &displaytime, &loop, &transcolor);
int r;
// if -k was provided, we now use direct mode rather than simply not using the
// alternate screen, so that output is inline with the shell.
@ -480,7 +495,7 @@ auto main(int argc, char** argv) -> int {
r = direct_mode_player(argc - nonopt, argv + nonopt, scalemode, blitter, ncopts.margin_l, ncopts.margin_r);
}else{
r = rendered_mode_player(argc - nonopt, argv + nonopt, scalemode, blitter, ncopts,
quiet, loop, timescale, displaytime);
quiet, loop, timescale, displaytime, transcolor);
}
if(r){
return EXIT_FAILURE;

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