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Add user option to scale the text down #1

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Add user option to scale the text down #1

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20 changes: 13 additions & 7 deletions sm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,7 @@ static PangoFontDescription *font;
static char *foreground = NULL;
static char *background = NULL;
static int inverted = 0; // 0 = normal, 1 = foreground and background swapped
static double user_scaling = 1.0;
static GdkRGBA white, black;
static char *fontdesc = NULL;
static int rotation = 0; // 0 = normal, 1 = left, 2 = inverted, 3 = right
Expand Down Expand Up @@ -130,7 +131,6 @@ static void redraw(GtkWidget *draw, cairo_t *cr, gpointer data) {
pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
}


pango_layout_get_pixel_size(layout, &w1, &h1);
if (w1>0 && h1>0) {
int w2 = gtk_widget_get_allocated_width(draw);
Expand All @@ -146,6 +146,7 @@ static void redraw(GtkWidget *draw, cairo_t *cr, gpointer data) {
}

double s = min ((double)w2/rw1, (double)h2/rh1);
s *= user_scaling;

if (alignment == 1) { // left align
cairo_translate(cr, (s * rw1)/2, h2/2);
Expand All @@ -154,6 +155,7 @@ static void redraw(GtkWidget *draw, cairo_t *cr, gpointer data) {
} else {
cairo_translate(cr, w2/2, h2/2);
}

cairo_rotate(cr, rotation * M_PI_2);
cairo_scale(cr, s, s);
cairo_translate(cr, -w1/2, -h1/2);
Expand Down Expand Up @@ -270,11 +272,12 @@ static struct option const long_options[] =
{"font", required_argument, NULL, 'n'},
{"rotate", required_argument, NULL, 'r'},
{"align", required_argument, NULL, 'a'},
{"scale", required_argument, NULL, 's'},
{0,0,0,0}
};

static void usage(char *cmd) {
printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-i|--inverted] [-n|--font=fontdesc] [-r|--rotate=0,1,2,3] [-a|--align=0,1,2]\n", cmd);
printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-i|--inverted] [-s|--scale=factor] [-n|--font=fontdesc] [-r|--rotate=0,1,2,3] [-a|--align=0,1,2]\n", cmd);
}

static void version() {
Expand All @@ -293,26 +296,22 @@ int main(int argc, char **argv) {
int c;
int input_provided = 0;

while ((c = getopt_long (argc, argv, "hVf:b:n:r:a:i", long_options, (int *) 0)) != EOF) {
while ((c = getopt_long (argc, argv, "hVf:b:n:r:a:is:", long_options, (int *) 0)) != EOF) {
switch (c) {
case 'h':
usage(argv[0]);
return 0;
break;

case 'V':
version();
return 0;
break;

case 'f':
foreground = optarg;
break;

case 'b':
background = optarg;
break;

case 'n':
fontdesc = optarg;
break;
Expand All @@ -325,6 +324,13 @@ int main(int argc, char **argv) {
case 'i':
inverted = !inverted;
break;
case 's':
user_scaling = atof(optarg);
if (user_scaling > 1.0 || user_scaling < 0.0) {
printf("Scale factor must be within [0.0, 1.0]\n");
return 0;
}
break;
default:
/* unknown switch received - at least
* give usage but continue and use the
Expand Down