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);
}
/* ARGSUSED */
static void HandleExpose(Engine *engine, Drauing *drauing, int xy[])
{
XEngine *xEngine= GisXEngine(engine);
if (!xEngine) return;
/* Redraw current picture on this engine only */
GpPreempt(engine);
nPage[0]= mPage[0]= CGMRelative(0);
sPage[0]= 1;
nPageGroups= 1;
ReadCGM(mPage, nPage, sPage, nPageGroups);
GpPreempt(0);
GxExpose(engine, drauing, xy);
}
static int EPS(int help)
{
char *token;
int device;
if (help) {
p_stderr("gist: eps command syntax:\n eps epsout\n");
p_stderr(" Open an Encapsulated PostScript file epsout, write\n");
p_stderr(" the current page to it, then close epsout.\n");
p_stderr(" (Note that an EPS file can have only a single page.)\n");
return 0;
}
token= strtok(0, " \t\n");
if (!token) {
p_stderr("gist: (SYNTAX) epsout name missing in eps command\n");
return 0;
}
if (CheckEOL("eps")) return 0;
device= FindDevice();
if (device>=8) return 0;
device= FindDevice();
if (device>=8) return 0;
outEngines[device]=
GpPSEngine("CGM Viewer", cgmLandscape, 0, "_tmp.eps");
if (!outEngines[device]) {
Warning(gistError, "");
Warning("Unable to create PostScript engine ", token);
return 0;
}
GpPreempt(outEngines[device]);
nPage[0]= mPage[0]= CGMRelative(0);
sPage[0]= 1;
nPageGroups= 1;
/* First read does PS part, second computes EPS preview */
if (!ReadCGM(mPage, nPage, sPage, nPageGroups)) {
GpPreempt(0);
outEngines[device]= EPSPreview(outEngines[device], token);
if (outEngines[device]) {
GpPreempt(outEngines[device]);
ReadCGM(mPage, nPage, sPage, nPageGroups);
} else {
Warning("memory manager failed creating EPS engine ", token);
return 0;
}
}
if (outEngines[device]) {
GpPreempt(0);
GpKillEngine(outEngines[device]);
outEngines[device]= 0;
}
return 0;
}
