static void redraw(GP_Backend *backend)
{
GP_Context *context = backend->context;
/* Now draw some testing patters */
black_pixel = GP_RGBToContextPixel(0x00, 0x00, 0x00, context);
white_pixel = GP_RGBToContextPixel(0xff, 0xff, 0xff, context);
red_pixel = GP_RGBToContextPixel(0xff, 0x00, 0x00, context);
blue_pixel = GP_RGBToContextPixel(0x00, 0x00, 0xff, context);
green_pixel = GP_RGBToContextPixel(0x00, 0xff, 0x00, context);
GP_Fill(context, white_pixel);
unsigned int i, j;
for (i = 0; i < 40; i++) {
GP_HLineXYW(context, 0, i, i, black_pixel);
GP_HLineXYW(context, 1, i + 40, i, black_pixel);
GP_HLineXYW(context, 2, i + 80, i, black_pixel);
GP_HLineXYW(context, 3, i + 120, i, black_pixel);
GP_HLineXYW(context, 4, i + 160, i, black_pixel);
GP_HLineXYW(context, 5, i + 200, i, black_pixel);
GP_HLineXYW(context, 6, i + 240, i, black_pixel);
GP_HLineXYW(context, 7, i + 280, i, black_pixel);
}
for (i = 0; i < 256; i++) {
for (j = 0; j < 256; j++) {
uint8_t val = 1.00 * sqrt(i*i + j*j)/sqrt(2) + 0.5;
GP_Pixel pix = GP_RGBToContextPixel(i, j, val, context);
GP_PutPixel(context, i + 60, j + 10, pix);
}
}
GP_Text(context, NULL, 60, 270, GP_VALIGN_BELOW|GP_ALIGN_RIGHT,
black_pixel, white_pixel, "Lorem Ipsum dolor sit...");
GP_Text(context, NULL, 60, 290, GP_VALIGN_BELOW|GP_ALIGN_RIGHT,
red_pixel, white_pixel, "Lorem Ipsum dolor sit...");
GP_Text(context, NULL, 60, 310, GP_VALIGN_BELOW|GP_ALIGN_RIGHT,
green_pixel, white_pixel, "Lorem Ipsum dolor sit...");
GP_Text(context, NULL, 60, 330, GP_VALIGN_BELOW|GP_ALIGN_RIGHT,
blue_pixel, white_pixel, "Lorem Ipsum dolor sit...");
/* Update the backend screen */
GP_BackendFlip(backend);
}
static void event_loop(void)
{
for (;;) {
GP_BackendWait(backend);
while (GP_BackendEventsQueued(backend)) {
GP_Event ev;
GP_BackendGetEvent(backend, &ev);
GP_EventDump(&ev);
switch (ev.type) {
case GP_EV_KEY:
draw_event(&ev);
switch (ev.val.key.key) {
case GP_KEY_ESC:
GP_BackendExit(backend);
exit(0);
break;
case GP_BTN_LEFT:
GP_HLineXXY(win, ev.cursor_x - 3,
ev.cursor_x + 3,
ev.cursor_y, red);
GP_VLineXYY(win, ev.cursor_x,
ev.cursor_y - 3,
ev.cursor_y + 3, red);
GP_BackendFlip(backend);
break;
default:
break;
}
break;
case GP_EV_REL:
switch (ev.code) {
static int size = 0;
case GP_EV_REL_POS:
if (GP_EventGetKey(&ev, GP_BTN_LEFT)) {
GP_PutPixel(win, ev.cursor_x,
ev.cursor_y, green);
}
int align = GP_ALIGN_RIGHT|GP_VALIGN_BOTTOM;
GP_TextClear(win, NULL, 20, 40, align,
black, size);
size = GP_Print(win, NULL, 20, 40, align,
white, black, "X=%3u Y=%3u dX=%3i dY=%3i",
ev.cursor_x, ev.cursor_y,
ev.val.rel.rx, ev.val.rel.ry);
GP_BackendFlip(backend);
break;
}
break;
case GP_EV_SYS:
switch (ev.code) {
case GP_EV_SYS_RESIZE:
GP_BackendResizeAck(backend);
break;
case GP_EV_SYS_QUIT:
GP_BackendExit(backend);
exit(0);
break;
}
break;
}
}
}
}
