void osd_init(struct osd_t* osd)
{
uint32_t display_width, display_height;
char str[2] = { 0, 0 };
uint32_t width, height;
int n;
int s;
s = gx_graphics_init(tiresias_pcfont, sizeof(tiresias_pcfont));
assert(s == 0);
s = graphics_get_display_size(0, &display_width, &display_height);
osd->display_width = display_width;
osd->display_height = display_height;
printf("osd_init: %d %d\n", display_width, display_height);
assert(s == 0);
//fprintf(stderr,"Display width=%d, height=%d\n",display_width,display_height);
/* The main OSD image */
s = gx_create_window(SCREEN, display_width, display_height, GRAPHICS_RESOURCE_RGBA32, &osd->img);
assert(s == 0);
graphics_resource_fill(osd->img, 0, 0, display_width, display_height, GRAPHICS_RGBA32(0,0,0,0));
graphics_display_resource(osd->img, 0, OSD_LAYER, 0, 0, GRAPHICS_RESOURCE_WIDTH, GRAPHICS_RESOURCE_HEIGHT, VC_DISPMAN_ROT0, 1);
/* A full-screen black image to either remove any left-over console text (BG_LAYER) or to hide the video (FG_LAYER) */
s = gx_create_window(SCREEN, display_width, display_height, GRAPHICS_RESOURCE_RGBA32, &osd->img_blank);
assert(s == 0);
graphics_resource_fill(osd->img_blank, 0, 0, display_width, display_height, GRAPHICS_RGBA32(0,0,0,255));
graphics_display_resource(osd->img_blank, 0, BG_LAYER, 0, 0, GRAPHICS_RESOURCE_WIDTH, GRAPHICS_RESOURCE_HEIGHT, VC_DISPMAN_ROT0, 1);
osd->video_blanked = 0;
osd->osd_cleartime = 0.0;
osd->last_now = time(NULL);
pthread_mutex_init(&osd->osd_mutex,NULL);
// cache font widths since graphics_resource_text_dimensions_ext is kind of slow
for (n = 32; n < 256; n++) {
str[0] = n;
graphics_resource_text_dimensions_ext(osd->img, str, 1, &width, &height, 40);
fontWidth[n] = (uint8_t)width;
}
(void)s; // remove compiler warning
}
int main(void)
{
GRAPHICS_RESOURCE_HANDLE img;
uint32_t width, height;
int LAYER=1;
bcm_host_init();
int s;
s = gx_graphics_init(".");
assert(s == 0);
s = graphics_get_display_size(0, &width, &height);
assert(s == 0);
s = gx_create_window(0, width, height, GRAPHICS_RESOURCE_RGBA32, &img);
assert(s == 0);
// transparent before display to avoid screen flash
graphics_resource_fill(img, 0, 0, width, height, GRAPHICS_RGBA32(0,0,0,0x00));
graphics_display_resource(img, 0, LAYER, 0, 0, GRAPHICS_RESOURCE_WIDTH, GRAPHICS_RESOURCE_HEIGHT, VC_DISPMAN_ROT0, 1);
uint32_t text_size = 10;
while (1) {
const char *text = "The quick brown fox jumps over the lazy dog";
uint32_t y_offset = height-60+text_size/2;
graphics_resource_fill(img, 0, 0, width, height, GRAPHICS_RGBA32(0,0,0,0x00));
// blue, at the top (y=40)
graphics_resource_fill(img, 0, 40, width, 1, GRAPHICS_RGBA32(0,0,0xff,0xff));
// green, at the bottom (y=height-40)
graphics_resource_fill(img, 0, height-40, width, 1, GRAPHICS_RGBA32(0,0xff,0,0xff));
// draw the subtitle text
render_subtitle(img, text, 0, text_size, y_offset);
graphics_update_displayed_resource(img, 0, 0, 0, 0);
text_size += 1;
if (text_size > 50)
text_size = 10;
}
graphics_display_resource(img, 0, LAYER, 0, 0, GRAPHICS_RESOURCE_WIDTH, GRAPHICS_RESOURCE_HEIGHT, VC_DISPMAN_ROT0, 0);
graphics_delete_resource(img);
return 0;
}