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#include "Vlib.h"
#ifdef X11
#include "gray0.xbm"
#include "gray1.xbm"
#include "gray2.xbm"
#include "gray3.xbm"
#include "gray4.xbm"
#include "gray5.xbm"
#include "gray6.xbm"
#include "gray7.xbm"
#endif
extern void VComputeClipNormals(Viewport * v);
int
ViewportSetDepthCueing(Viewport * v, int flag)
{
int status = 0;
if (_VDefaultWorkContext->depthCueSteps > 1 &&
v->flags & (VPFastAnimation || VPDoubleBuffer)) {
if (flag)
v->flags |= VPDepthCueing;
else
v->flags &= ~VPDepthCueing;
}
else {
return -1;
}
return status;
}
Viewport *
VOpenViewport(Display * dpy, int screen, Window win, Colormap cmap, Visual * visual, double unit, double dist, double scale, int width, int height)
{
Viewport *v;
VPoint clip[4];
int planes, i;
int maxpcolors;
maxpcolors = (visual->map_entries == 2) ? 256 : visual->map_entries;
/*
* Allocate space for the Viewport structure
*/
v = (Viewport *) Vmalloc(sizeof(Viewport));
v->zsize = 32768;
v->ztop = 0;
v->zpool = (ZInfo *) Vmalloc(sizeof(ZInfo) * v->zsize);
v->depth = MaxDepth;
v->lastPixel = 0xffffffff;
#ifndef X11
v->w = InitializeAWindow(width, height);
#endif
/*
* Calculate screen resolution in pixels per unit.
*/
v->dist = dist;
v->units = unit;
v->xres = ((((double) DisplayWidth(dpy, screen)) * unit * 1000.0) /
((double) DisplayWidthMM(dpy, screen)));
v->yres = ((((double) DisplayHeight(dpy, screen)) * unit * 1000.0) /
((double) DisplayHeightMM(dpy, screen)));
/*
* Use that info to set scaling factors.
*/
v->Scale.x = v->xres * dist * scale * 4;
v->Scale.y = v->yres * dist * scale * 4;
v->Scale.z = 1.0;
v->Middl.x = width * 2;
v->Middl.y = height * 2;
/*
* Build the clipping planes for our view into the eye space.
*/
clip[0].x = -width / v->xres / 2.0 / scale;
clip[0].y = -height / v->yres / 2.0 / scale;
clip[0].z = dist;
clip[1].x = -width / v->xres / 2.0 / scale;
clip[1].y = height / v->yres / 2.0 / scale;
clip[1].z = dist;
clip[2].x = width / v->xres / 2.0 / scale;
clip[2].y = height / v->yres / 2.0 / scale;
clip[2].z = dist;
clip[3].x = width / v->xres / 2.0 / scale;
clip[3].y = -height / v->yres / 2.0 / scale;
clip[3].z = dist;
v->clipPoly = VCreatePolygon(4, clip, (VColor *) 0);
VGetPlanes(v->clipPoly);
VComputeClipNormals(v);
/*
* Fill out the rest of the structure.
*/
v->flags = VPPerspective | VPClip | VPFastAnimation;
v->dpy = dpy;
v->cmap = cmap;
v->visual = visual;
v->screen = screen;
v->win = win;
VIdentMatrix(&v->eyeSpace);
v->set = 0;
v->width = width;
v->height = height;
v->aPixel = (Color *) Vmalloc(sizeof(Color) * maxpcolors);
memset(v->aPixel, 0, sizeof(Color) * maxpcolors);
for (i = 0; i < MAXCOLORS; ++i) {
v->bPixel[i] = 0;
}
v->colorTweakProc = (void (*)()) NULL;
/*
* Is this a monochrome situation? We also resort to monochrome on
* color systems that probably won't have enough color cell space
* to support double buffering. We'll also use pixmaps if the
* global variable "usePixmaps" is non-zero.
*/
planes = DisplayPlanes(dpy, screen);
if (v->flags & VPDoubleBuffer ||
planes < PLANECOUNT * 2 + 2 ||
_VDefaultWorkContext->usePixmaps != 0) {
if ((v->flags & VPFastAnimation) == 0) {
v->monoPixmap = XCreatePixmap(dpy,
RootWindow(dpy, screen), width, height, planes);
v->flags |= VPPixmap;
}
#ifdef HAVE_X11_DBE
if (v->flags & VPDoubleBuffer) {
v->gc = XCreateGC(dpy, RootWindow(dpy, screen),
0, NULL);
v->flags |= VPPixmap;
v->dbeDrawable = XdbeAllocateBackBufferName(dpy, win,
XdbeUntouched);
v->AllocColor = VdbeAllocColor;
v->DrawSegments = VdbeDrawSegments;
v->DrawLine = VdbeDrawLine;
v->FillPolygon = VdbeFillPolygon;
v->FillRectangle = VdbeFillRectangle;
v->ExposeBuffer = VdbeExposeBuffer;
v->SetClipRect = VdbeSetClipRect;
v->Close = VdbeClose;
return v;
}
#endif
if (planes == 1 || _VDefaultWorkContext->usePixmaps != 0)
v->flags |= VPMono;
v->mask = AllPlanes;
}
#ifdef X11
v->w = InitializeX11AWindow(dpy, screen, win,
(v->flags & VPMono) ? AMonoMode : 0);
v->AllocColor = AlibAllocColor;
v->DrawSegments = AlibDrawSegments;
v->DrawLine = AlibDrawLine;
v->FillPolygon = AlibFillPolygon;
v->FillRectangle = AlibFillRectangle;
v->ExposeBuffer = AlibExposeBuffer;
v->SetClipRect = AlibSetClipRect;
v->Close = AlibClose;
/*
* Create the halftone bitmaps
*/
v->halftone[0] = XCreateBitmapFromData(dpy, win, gray0_bits,
gray0_width, gray0_height);
v->halftone[1] = XCreateBitmapFromData(dpy, win, gray1_bits,
gray1_width, gray1_height);
v->halftone[2] = XCreateBitmapFromData(dpy, win, gray2_bits,
gray2_width, gray2_height);
v->halftone[3] = XCreateBitmapFromData(dpy, win, gray3_bits,
gray3_width, gray3_height);
v->halftone[4] = XCreateBitmapFromData(dpy, win, gray4_bits,
gray4_width, gray4_height);
v->halftone[5] = XCreateBitmapFromData(dpy, win, gray5_bits,
gray5_width, gray5_height);
v->halftone[6] = XCreateBitmapFromData(dpy, win, gray6_bits,
gray6_width, gray6_height);
v->halftone[7] = XCreateBitmapFromData(dpy, win, gray7_bits,
gray7_width, gray7_height);
v->w->stipple = v->halftone;
#endif
return v;
}
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