uint32_t allocate_and_set_vc_handle(gralloc_private_handle_t *private_handle) {
uint32_t vc_handle = 0;
DISPMANX_RESOURCE_HANDLE_T resource_handle = vc_dispmanx_resource_create(
convert_android_to_vc_img_type(private_handle->pixel_format), private_handle->w, private_handle->h,
&vc_handle);
//vc_dispmanx_resource_create set vc_handle to 0
//call to vc_dispmanx_resource_get_image_handle is needed
vc_handle = vc_dispmanx_resource_get_image_handle(resource_handle);
return vc_handle;
}
void dispmanxtest() {
DISPMANX_DISPLAY_HANDLE_T display;
int ret;
DISPMANX_MODEINFO_T displayinfo;
DISPMANX_RESOURCE_HANDLE_T res;
int width = 1024;
int height = 576;
uint32_t vc_image_ptr;
DISPMANX_UPDATE_HANDLE_T update;
VC_RECT_T dst_rect,src_rect;
DISPMANX_ELEMENT_HANDLE_T element;
bcm_host_init();
display = vc_dispmanx_display_open(0);
ret = vc_dispmanx_display_get_info( display, &displayinfo);
assert(ret==0);
printf("display is %dx%d\n",displayinfo.width,displayinfo.height);
res = vc_dispmanx_resource_create(VC_IMAGE_YUV420,width,height,&vc_image_ptr);
vc_image_ptr = vc_dispmanx_resource_get_image_handle(res);
printf("vc_image_ptr %x\n",vc_image_ptr);
assert(res);
update = vc_dispmanx_update_start(10);
assert(update);
vc_dispmanx_rect_set(&src_rect,0,0,width<<16,height<<16);
vc_dispmanx_rect_set(&dst_rect,0,(displayinfo.height - height)/2,width-32,height);
element = vc_dispmanx_element_add(update,display,2000,&dst_rect,res,&src_rect,DISPMANX_PROTECTION_NONE,NULL,NULL,DISPMANX_NO_ROTATE);
ret = vc_dispmanx_update_submit_sync(update);
assert(ret==0);
uint8_t *rawfb = (uint8_t*)mapmem(vc_image_ptr,0x1000);
for (int i=0; i<0x100; i++) {
printf("%02x ",rawfb[i]);
}
printf("\n");
unmapmem(rawfb,0x1000);
puts("sleeping");
sleep(10);
update = vc_dispmanx_update_start(10);
assert(update);
ret = vc_dispmanx_element_remove(update,element);
assert(ret==0);
ret = vc_dispmanx_update_submit_sync(update);
assert(ret==0);
ret = vc_dispmanx_resource_delete(res);
assert(ret==0);
ret = vc_dispmanx_display_close(display);
assert(ret==0);
}
