int
g_rgb_read(Engine *eng, GpColor *rgb, long *nx, long *ny)
{
XEngine *xeng = GisXEngine(eng);
if (!xeng || !xeng->w || !xeng->win) return 1;
GpPreempt(eng);
GdDraw(1); /* make sure screen updated */
GpPreempt(0);
if (xeng->w == xeng->win) {
/* not in animate mode */
if (!rgb) {
*nx = xeng->wtop;
*ny = xeng->htop;
} else {
p_rgb_read(xeng->win, rgb, xeng->leftMargin, xeng->topMargin,
xeng->leftMargin+xeng->wtop, xeng->topMargin+xeng->htop);
}
} else {
/* in animate mode, read offscreen pixmap */
if (!rgb) {
*nx = xeng->a_width;
*ny = xeng->a_height;
} else {
p_rgb_read(xeng->w, rgb, 0, 0, xeng->a_width, xeng->a_height);
}
}
return 0;
}
void
GxExpose(Engine *engine, Drauing *drawing, int *xy)
{
XEngine *xeng = (XEngine *)engine;
GpBox damage;
if (!drawing || !xeng->w) return;
/* xy=0 to redraw all, otherwise x0,y0,x1,y1 */
if (xy) {
GpXYMap *map = &engine->devMap;
damage.xmin= (xy[0]-map->x.offset)/map->x.scale;
damage.xmax= (xy[2]-map->x.offset)/map->x.scale;
damage.ymax= (xy[1]-map->y.offset)/map->y.scale;
damage.ymin= (xy[3]-map->y.offset)/map->y.scale;
} else {
damage.xmin = xeng->swapped.viewport.xmin;
damage.xmax = xeng->swapped.viewport.xmax;
damage.ymin = xeng->swapped.viewport.ymin;
damage.ymax = xeng->swapped.viewport.ymax;
}
if (engine->damaged) {
GpSwallow(&engine->damage, &damage);
} else {
engine->damage = damage;
engine->damaged = 1;
}
GdSetDrawing(drawing);
GpPreempt(engine);
GdDraw(1);
GpPreempt(0); /* not correct if damaged during a preempt... */
GdSetDrawing(0);
}
static void UpdateOrRedraw(int changesOnly)
{
Engine *display= currentDevice<0? 0 : ghDevices[currentDevice].display;
if (!display) return;
GpPreempt(display);
if (gdraw_hook) gdraw_hook(display, 0);
GdDraw(changesOnly);
GpFlush(0);
if (gdraw_hook) gdraw_hook(display, 1);
GpPreempt(0);
}
void GhHCP(void)
{
Engine *hcp= currentDevice<0? 0 : ghDevices[currentDevice].hcp;
if (!hcp) hcp= hcpDefault;
if (!hcp) return;
GpPreempt(hcp);
if (gdraw_hook) gdraw_hook(hcp, 4);
GdDraw(0);
/* NB- must be very careful not to Preempt twice with GdDrawLegends */
if (ghDevices[currentDevice].doLegends) GdDrawLegends(0);
GpClear(0, ALWAYS);
GpFlush(0);
if (gdraw_hook) gdraw_hook(hcp, 5);
GpPreempt(0);
}
void GhFMA(void)
{
Engine *display;
Engine *hcp= 0;
if (currentDevice<0) return;
display= ghDevices[currentDevice].display;
if (animateOn && !display) animateOn= 0;
if (hcpOn) {
hcp= ghDevices[currentDevice].hcp;
if (!hcp) hcp= hcpDefault;
if (hcp) GpActivate(hcp);
}
if (gdraw_hook) gdraw_hook(display, 2);
GdDraw(1);
if (hcpOn && hcp && ghDevices[currentDevice].doLegends)
GdDrawLegends(hcp);
if (animateOn) GxStrobe(display, 1);
GpFlush(0);
if (animateOn!=1) GdClear(0);
else GdClearSystem();
if (gdraw_hook) gdraw_hook(display, 3);
if (hcpOn && hcp) {
GpClear(hcp, CONDITIONALLY);
GpDeactivate(hcp);
}
ghDevices[currentDevice].fmaCount++;
if (++fmaCount > 100) { /* clean house once in a while */
fmaCount= 0;
GaFreeScratch();
}
}
