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#include <obs-module.h>
#include <pango/pangocairo.h>
enum {
FORMAT_MAXLEN = 64,
FONT_MAXLEN = 64,
TEXT_MAXLEN = 64,
PERIOD_S = 1,
};
struct time_source {
float elapsed;
uint32_t width, height;
gs_texture_t *tex;
struct vec4 bg, fg, outline;
double outlinew;
char format[FORMAT_MAXLEN + 1];
char font[FONT_MAXLEN + 1];
};
static const char *
time_source_get_name(void *type_data)
{
UNUSED_PARAMETER(type_data);
return obs_module_text("TimeSource");
}
static void
render(struct time_source *context)
{
/* Format time */
time_t t = time(NULL);
struct tm *tmp = localtime(&t);
char buf[TEXT_MAXLEN + 1];
size_t sz = strftime(buf, TEXT_MAXLEN + 1, context->format, tmp);
if (!sz) {
buf[0] = '\0';
}
/* Layout */
PangoContext *pango = pango_font_map_create_context(
pango_cairo_font_map_get_default());
PangoLayout *layout = pango_layout_new(pango);
PangoFontDescription *desc = pango_font_description_from_string(
context->font);
pango_layout_set_font_description(layout, desc);
pango_font_description_free(desc);
pango_layout_set_text(layout, buf, TEXT_MAXLEN);
int width, height;
pango_layout_get_pixel_size(layout, &width, &height);
assert(width >= 0 && height >= 0);
context->width = width;
context->height = height;
/* Render */
cairo_surface_t *surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, context->width, context->height);
cairo_t *cr = cairo_create(surface);
cairo_set_source_rgba(cr, context->bg.x, context->bg.y, context->bg.z,
context->bg.w);
cairo_paint(cr);
cairo_set_source_rgba(cr, context->outline.x, context->outline.y,
context->outline.z, context->outline.w);
cairo_set_line_width(cr, context->outlinew);
pango_cairo_layout_path(cr, layout);
cairo_stroke(cr);
cairo_set_source_rgba(cr, context->fg.x, context->fg.y, context->fg.z,
context->fg.w);
pango_cairo_show_layout(cr, layout);
/* OBS texture */
cairo_surface_flush(surface);
unsigned char *textdata = cairo_image_surface_get_data(surface);
obs_enter_graphics();
if (context->tex) {
gs_texture_destroy(context->tex);
}
context->tex = gs_texture_create(context->width, context->height,
GS_BGRA, 1, (const uint8_t **)&textdata, 0);
obs_leave_graphics();
/* Cleanup */
cairo_destroy(cr);
cairo_surface_destroy(surface);
g_object_unref(layout);
g_object_unref(pango);
}
static void
time_source_update(void *data, obs_data_t *settings)
{
struct time_source *context = data;
strncpy(context->format, obs_data_get_string(settings, "format"),
FORMAT_MAXLEN);
obs_data_t *font_obj = obs_data_get_obj(settings, "font");
snprintf(context->font, FONT_MAXLEN, "%s %lld",
obs_data_get_string(font_obj, "face"),
obs_data_get_int(font_obj, "size"));
obs_data_release(font_obj);
vec4_from_rgba(&context->bg, obs_data_get_int(settings, "bg"));
vec4_from_rgba(&context->fg, obs_data_get_int(settings, "fg"));
vec4_from_rgba(&context->outline, obs_data_get_int(settings, "outline"));
context->outlinew = obs_data_get_double(settings, "outlinew");
render(context);
}
static void *
time_source_create(obs_data_t *settings, obs_source_t *source)
{
UNUSED_PARAMETER(source);
struct time_source *context = bzalloc(sizeof(struct time_source));
time_source_update(context, settings);
render(context);
return context;
}
static void
time_source_destroy(void *data)
{
struct time_source *context = data;
if (context->tex) {
obs_enter_graphics();
gs_texture_destroy(context->tex);
obs_leave_graphics();
}
bfree(context);
}
static uint32_t
time_source_getwidth(void *data)
{
struct time_source *context = data;
return context->width;
}
static uint32_t
time_source_getheight(void *data)
{
struct time_source *context = data;
return context->height;
}
static void
time_source_tick(void *data, float seconds)
{
struct time_source *context = data;
context->elapsed += seconds;
}
static void
time_source_render(void *data, gs_effect_t *effect)
{
UNUSED_PARAMETER(effect);
struct time_source *context = data;
if (context->elapsed >= PERIOD_S) {
render(context);
context->elapsed = 0;
}
obs_source_draw(context->tex, 0, 0, context->width, context->height,
false);
}
static void
time_source_defaults(obs_data_t *settings)
{
obs_data_set_default_string(settings, "format", "%Y-%m-%d %H:%M:%S");
obs_data_t *font_obj = obs_data_create();
obs_data_set_default_string(font_obj, "face", "Sans Serif");
obs_data_set_default_int(font_obj, "size", 72);
obs_data_set_default_obj(settings, "font", font_obj);
obs_data_release(font_obj);
obs_data_set_default_int(settings, "bg", 0x00000000);
obs_data_set_default_int(settings, "fg", 0xFFFFFFFF);
obs_data_set_default_int(settings, "outline", 0xFF000000);
obs_data_set_default_double(settings, "outlinew", 10.0);
}
static obs_properties_t *
time_source_properties(void *data)
{
UNUSED_PARAMETER(data);
obs_properties_t *props = obs_properties_create();
obs_properties_add_text(props, "format",
obs_module_text("TimeSource.Format"), OBS_TEXT_DEFAULT);
obs_property_set_long_description(obs_properties_get(props, "format"),
obs_module_text("TimeSource.FormatDesc"));
obs_properties_add_font(props, "font",
obs_module_text("TimeSource.Font"));
obs_properties_add_color_alpha(props, "bg",
obs_module_text("TimeSource.BackgroundColor"));
obs_properties_add_color_alpha(props, "fg",
obs_module_text("TimeSource.ForegroundColor"));
obs_properties_add_color_alpha(props, "outline",
obs_module_text("TimeSource.OutlineColor"));
obs_properties_add_float(props, "outlinew",
obs_module_text("TimeSource.OutlineWidth"), 0.0, INFINITY, 1.0);
return props;
}
struct obs_source_info time_source_info = {
.id = "time_source",
.type = OBS_SOURCE_TYPE_INPUT,
.output_flags = OBS_SOURCE_VIDEO,
.get_name = time_source_get_name,
.create = time_source_create,
.destroy = time_source_destroy,
.get_width = time_source_getwidth,
.get_height = time_source_getheight,
.video_tick = time_source_tick,
.video_render = time_source_render,
.get_defaults = time_source_defaults,
.get_properties = time_source_properties,
.update = time_source_update,
.icon_type = OBS_ICON_TYPE_TEXT,
};
OBS_DECLARE_MODULE()
OBS_MODULE_USE_DEFAULT_LOCALE("time-source", "en-US")
bool
obs_module_load(void)
{
obs_register_source(&time_source_info);
return true;
}
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