/* init buffered windows by allocating pixmap buffer and clearing background*/
void
GsInitWindowBuffer(GR_WINDOW *wp, GR_SIZE width, GR_SIZE height)
{
/* create same size RGBA pixmap for buffer*/
GR_WINDOW_ID id;
/* check if buffer size changed*/
if (wp->buffer) {
if (wp->width == width && wp->height == height)
return;
GsDestroyPixmap(wp->buffer);
}
id = GsNewPixmap(width, height, MWIF_RGBA8888, NULL);
wp->buffer = GsFindPixmap(id);
if (!wp->buffer) {
wp->props &= ~(GR_WM_PROPS_BUFFERED | GR_WM_PROPS_DRAWING_DONE);
return;
}
/* mark buffer as not ready for display*/
wp->props &= ~GR_WM_PROPS_DRAWING_DONE;
/* clear buffer to background color*/
if (!(wp->props & GR_WM_PROPS_NOBACKGROUND)) {
GR_PIXMAP *pp = wp->buffer;
/* clip to pixmap boundaries*/
#if DYNAMICREGIONS
GdSetClipRegion(pp->psd, GdAllocRectRegion(0, 0, pp->psd->xvirtres, pp->psd->yvirtres));
#else
MWCLIPRECT cliprect;
cliprect.x = 0;
cliprect.y = 0;
cliprect.width = pp->psd->xvirtres;
cliprect.height = pp->psd->yvirtres;
GdSetClipRects(pp->psd, 1, &cliprect);
#endif
clipwp = NULL; /* reset clip cache for next window draw*/
curgcp = NULL; /* invalidate gc cache since we're changing color and mode*/
GdSetFillMode(GR_FILL_SOLID);
GdSetMode(GR_MODE_COPY);
GdSetForegroundColor(pp->psd, wp->background);
GdFillRect(pp->psd, 0, 0, pp->width, pp->height);
}
}
/*
* Setup clip region from device context's associated window or bitmap.
* Memory DC's are always associated with the desktop window, and are
* always visible. Return the DC's hwnd if window is visible.
*/
HWND
MwPrepareDC(HDC hdc)
{
HWND hwnd;
if(!hdc || !hdc->hwnd)
return NULL;
hwnd = hdc->hwnd;
if (hwnd->unmapcount)
return NULL;
/*
* If the window is not the currently clipped one, then
* make it the current one and define its clip rectangles.
*/
if(hdc != cliphdc) {
/* clip memory dc's to the bitmap size*/
if(hdc->psd->flags&PSF_MEMORY) {
#if DYNAMICREGIONS
GdSetClipRegion(hdc->psd,
GdAllocRectRegion(0, 0, hdc->psd->xvirtres,
hdc->psd->yvirtres));
#else
static MWCLIPRECT crc = {0, 0, 0, 0};
crc.width = hdc->psd->xvirtres;
crc.height = hdc->psd->yvirtres;
GdSetClipRects(hdc->psd, 1, &crc);
#endif
} else MwSetClipWindow(hdc);
cliphdc = hdc;
}
return hwnd;
}
/*
* Prepare to do drawing in a window or pixmap using the specified
* graphics context. Returns the drawable pointer if successful,
* and the type of drawing id that was supplied. Returns the special value
* GR_DRAW_TYPE_NONE if an error is generated, or if drawing is useless.
*/
GR_DRAW_TYPE GsPrepareDrawing(GR_DRAW_ID id, GR_GC_ID gcid, GR_DRAWABLE **retdp)
{
GR_WINDOW *wp; /* found window */
GR_PIXMAP *pp; /* found pixmap */
GR_GC *gcp; /* found graphics context */
GR_FONT *fontp;
GR_REGION *regionp; /* user clipping region */
MWCLIPREGION *reg;
PMWFONT pf;
*retdp = NULL;
gcp = GsFindGC(gcid);
if (gcp == NULL)
return GR_DRAW_TYPE_NONE;
/*
* If the graphics context is not the current one, then
* make it the current one and remember to update it.
*/
if (gcp != curgcp) {
curgcp = gcp;
gcp->changed = GR_TRUE;
}
/*
* Look for window or pixmap id
*/
pp = NULL;
wp = GsFindWindow(id);
if (wp == NULL) {
pp = GsFindPixmap(id);
if (pp == NULL)
return GR_DRAW_TYPE_NONE;
#if DYNAMICREGIONS
reg = GdAllocRectRegion(0, 0, pp->psd->xvirtres,
pp->psd->yvirtres);
/* intersect with user region if any*/
if (gcp->regionid) {
regionp = GsFindRegion(gcp->regionid);
if (regionp)
GdIntersectRegion(reg, reg, regionp->rgn);
}
GdSetClipRegion(pp->psd, reg);
#else
{
MWCLIPRECT cliprect;
/* FIXME: setup pixmap clipping, different from windows*/
cliprect.x = 0;
cliprect.y = 0;
cliprect.width = pp->psd->xvirtres;
cliprect.height = pp->psd->yvirtres;
GdSetClipRects(pp->psd, 1, &cliprect);
}
#endif
/* reset clip cache for next window draw*/
clipwp = NULL;
} else {
if (!wp->output) {
GsError(GR_ERROR_INPUT_ONLY_WINDOW, id);
return GR_DRAW_TYPE_NONE;
}
if (wp->unmapcount)
return GR_DRAW_TYPE_NONE;
/*
* If the window is not the currently clipped one,
* then make it the current one and define its clip rectangles.
*/
if (wp != clipwp || gcp->changed) {
/* find user region for intersect*/
if (gcp->regionid)
regionp = GsFindRegion(gcp->regionid);
else regionp = NULL;
/*
* Special handling if user region is not at offset 0,0
*/
if (regionp && (gcp->xoff || gcp->yoff)) {
MWCLIPREGION *local = GdAllocRegion();
GdCopyRegion(local, regionp->rgn);
GdOffsetRegion(local, gcp->xoff, gcp->yoff);
GsSetClipWindow(wp, local,
gcp->mode & ~GR_MODE_DRAWMASK);
GdDestroyRegion(local);
} else {
GsSetClipWindow(wp, regionp? regionp->rgn: NULL,
gcp->mode & ~GR_MODE_DRAWMASK);
}
}
}
/*
* If the graphics context has been changed, then tell the
* device driver about it.
*/
if (gcp->changed) {
GdSetForeground(GdFindColor(gcp->foreground));
GdSetBackground(GdFindColor(gcp->background));
GdSetMode(gcp->mode & GR_MODE_DRAWMASK);
GdSetUseBackground(gcp->usebackground);
fontp = GsFindFont(gcp->fontid);
pf = fontp? fontp->pfont: stdfont;
GdSetFont(pf);
gcp->changed = GR_FALSE;
}
*retdp = wp? (GR_DRAWABLE *)wp: (GR_DRAWABLE *)pp;
return wp? GR_DRAW_TYPE_WINDOW: GR_DRAW_TYPE_PIXMAP;
}
/*
* Set the clip rectangles for a window taking into account other
* windows that may be obscuring it. The windows that may be obscuring
* this one are the siblings of each direct ancestor which are higher
* in priority than those ancestors. Also, each parent limits the visible
* area of the window. The clipping is not done if it is already up to
* date of if the window is not outputtable.
*/
void
GsSetClipWindow(GR_WINDOW *wp, MWCLIPREGION *userregion, int flags)
{
GR_WINDOW *pwp; /* parent window */
GR_WINDOW *sibwp; /* sibling windows */
MWCLIPRECT *clip; /* first clip rectangle */
GR_COUNT count; /* number of clip rectangles */
GR_COUNT newcount; /* number of new rectangles */
GR_COUNT i; /* current index */
GR_COORD minx; /* minimum clip x coordinate */
GR_COORD miny; /* minimum clip y coordinate */
GR_COORD maxx; /* maximum clip x coordinate */
GR_COORD maxy; /* maximum clip y coordinate */
GR_COORD diff; /* difference in coordinates */
GR_SIZE bs; /* border size */
GR_BOOL toomany; /* TRUE if too many clip rects */
MWCLIPRECT cliprects[MAX_CLIPRECTS]; /* clip rectangles */
if (!wp->realized || !wp->output || (wp == clipwp))
return;
clipwp = wp;
/*
* Start with the rectangle for the complete window.
* We will then cut pieces out of it as needed.
*/
count = 1;
clip = cliprects;
clip->x = wp->x;
clip->y = wp->y;
clip->width = wp->width;
clip->height = wp->height;
/*
* First walk upwards through all parent windows,
* and restrict the visible part of this window to the part
* that shows through all of those parent windows.
*/
pwp = wp;
while (pwp != rootwp) {
pwp = pwp->parent;
diff = pwp->x - clip->x;
if (diff > 0) {
clip->width -= diff;
clip->x = pwp->x;
}
diff = (pwp->x + pwp->width) - (clip->x + clip->width);
if (diff < 0)
clip->width += diff;
diff = pwp->y - clip->y;
if (diff > 0) {
clip->height -= diff;
clip->y = pwp->y;
}
diff = (pwp->y + pwp->height) - (clip->y + clip->height);
if (diff < 0)
clip->height += diff;
}
/*
* If the window is completely clipped out of view, then
* set the clipping region to indicate that.
*/
if ((clip->width <= 0) || (clip->height <= 0)) {
GdSetClipRects(clipwp->psd, 1, cliprects);
return;
}
/*
* Now examine all windows that obscure this window, and
* for each obscuration, break up the clip rectangles into
* the smaller pieces that are still visible. The windows
* that can obscure us are the earlier siblings of all of
* our parents.
*/
toomany = GR_FALSE;
pwp = wp;
/*while (pwp != rootwp) {*/
while (pwp != NULL) {
wp = pwp;
pwp = wp->parent;
if(!pwp) {
/* We're clipping the root window*/
sibwp = rootwp->children;
wp = NULL;
} else
sibwp = pwp->children;
for (; sibwp != wp; sibwp = sibwp->siblings) {
if (!sibwp->realized || !sibwp->output)
continue;
bs = sibwp->bordersize;
minx = sibwp->x - bs;
miny = sibwp->y - bs;
maxx = sibwp->x + sibwp->width + bs - 1;
maxy = sibwp->y + sibwp->height + bs - 1;
newcount = count;
for (i = 0; i < count; i++) {
if (newcount > MAX_CLIPRECTS - 3) {
toomany = GR_TRUE;
break;
}
newcount += GsSplitClipRect(&cliprects[i],
&cliprects[newcount],
minx, miny, maxx, maxy);
}
count = newcount;
}
if(pwp == rootwp)
break;
}
if (toomany) {
GsError(GR_ERROR_TOO_MUCH_CLIPPING, wp->id);
clip->x = 0;
clip->y = 0;
clip->width = -1;
clip->height = -1;
count = 1;
}
/*
* Set the clip rectangles.
*/
GdSetClipRects(clipwp->psd, count, cliprects);
}
/*
* Prepare to do drawing in a window or pixmap using the specified
* graphics context. Returns the drawable pointer if successful,
* and the type of drawing id that was supplied. Returns the special value
* GR_DRAW_TYPE_NONE if an error is generated, or if drawing is useless.
*/
GR_DRAW_TYPE
GsPrepareDrawing(GR_DRAW_ID id, GR_GC_ID gcid, GR_DRAWABLE **retdp)
{
GR_WINDOW *wp; /* found window */
GR_PIXMAP *pp; /* found pixmap */
GR_GC *gcp; /* found graphics context */
GR_REGION *regionp; /* user clipping region */
MWCLIPREGION*reg;
*retdp = NULL;
gcp = GsFindGC(gcid);
if (gcp == NULL)
return GR_DRAW_TYPE_NONE;
/*
* If the graphics context is not the current one, then
* make it the current one and remember to update it.
*/
if (gcp != curgcp) {
curgcp = gcp;
gcp->changed = GR_TRUE;
}
/*
* Look for window or pixmap id
*/
pp = NULL;
wp = GsFindWindow(id);
if (wp == NULL) {
pp = GsFindPixmap(id);
if (pp == NULL)
return GR_DRAW_TYPE_NONE;
havepixmap:
#if DYNAMICREGIONS
reg = GdAllocRectRegion(0, 0, pp->psd->xvirtres, pp->psd->yvirtres);
/* intersect with user region if any*/
if (gcp->regionid) {
regionp = GsFindRegion(gcp->regionid);
if (regionp) {
/* handle pixmap offsets*/
if (gcp->xoff || gcp->yoff) {
MWCLIPREGION *local = GdAllocRegion();
GdCopyRegion(local, regionp->rgn);
GdOffsetRegion(local, gcp->xoff, gcp->yoff);
GdIntersectRegion(reg, reg, local);
GdDestroyRegion(local);
} else
GdIntersectRegion(reg, reg, regionp->rgn);
}
}
GdSetClipRegion(pp->psd, reg);
#else
{
MWCLIPRECT cliprect;
/* FIXME: setup pixmap clipping, different from windows*/
cliprect.x = 0;
cliprect.y = 0;
cliprect.width = pp->psd->xvirtres;
cliprect.height = pp->psd->yvirtres;
GdSetClipRects(pp->psd, 1, &cliprect);
}
#endif
/* reset clip cache for next window draw*/
clipwp = NULL;
} else {
if (!wp->output) {
GsError(GR_ERROR_INPUT_ONLY_WINDOW, id);
return GR_DRAW_TYPE_NONE;
}
/* check if buffered window*/
if (wp->props & GR_WM_PROPS_BUFFERED) {
pp = wp->buffer;
wp = NULL;
goto havepixmap; /* draw into pixmap buffer*/
}
if (!wp->realized)
return GR_DRAW_TYPE_NONE;
/*
* If the window is not the currently clipped one,
* then make it the current one and define its clip rectangles.
*/
if (wp != clipwp || gcp->changed) {
#if DYNAMICREGIONS
/* find user region for intersect*/
regionp = gcp->regionid? GsFindRegion(gcp->regionid): NULL;
/* Special handling if user region is not at offset 0,0*/
if (regionp && (gcp->xoff || gcp->yoff)) {
MWCLIPREGION *local = GdAllocRegion();
GdCopyRegion(local, regionp->rgn);
GdOffsetRegion(local, gcp->xoff, gcp->yoff);
GsSetClipWindow(wp, local, gcp->mode & ~GR_MODE_DRAWMASK);
GdDestroyRegion(local);
} else
GsSetClipWindow(wp, regionp? regionp->rgn: NULL, gcp->mode & ~GR_MODE_DRAWMASK);
#else
GsSetClipWindow(wp, NULL, gcp->mode & ~GR_MODE_DRAWMASK);
#endif /* DYNAMICREGIONS*/
}
}
/*
* If the graphics context has been changed, then tell the
* device driver about it.
*/
if (gcp->changed) {
PSD psd = (wp ? wp->psd : pp->psd);
uint32_t mask;
int count;
if (gcp->linestyle == GR_LINE_SOLID) {
mask = 0;
count = 0;
} else {
mask = gcp->dashmask;
count = gcp->dashcount;
}
if (gcp->fgispixelval)
GdSetForegroundPixelVal(psd, gcp->foreground);
else
GdSetForegroundColor(psd, gcp->foreground);
if (gcp->bgispixelval)
GdSetBackgroundPixelVal(psd, gcp->background);
else
GdSetBackgroundColor(psd, gcp->background);
GdSetMode(gcp->mode & GR_MODE_DRAWMASK);
GdSetUseBackground(gcp->usebackground);
#if MW_FEATURE_SHAPES
GdSetDash(&mask, &count);
GdSetFillMode(gcp->fillmode);
GdSetTSOffset(gcp->ts_offset.x, gcp->ts_offset.y);
switch(gcp->fillmode) {
case GR_FILL_STIPPLE:
case GR_FILL_OPAQUE_STIPPLE:
GdSetStippleBitmap(gcp->stipple.bitmap, gcp->stipple.width, gcp->stipple.height);
break;
case GR_FILL_TILE:
GdSetTilePixmap(gcp->tile.psd, gcp->tile.width, gcp->tile.height);
break;
}
#endif
gcp->changed = GR_FALSE;
}
*retdp = wp? (GR_DRAWABLE *)wp: (GR_DRAWABLE *)pp;
return wp? GR_DRAW_TYPE_WINDOW: GR_DRAW_TYPE_PIXMAP;
}
/*
* Open low level graphics driver
*/
PSD
GdOpenScreen(void)
{
PSD psd;
MWPALENTRY * stdpal;
MWSCREENINFO sinfo;
psd = scrdev.Open(&scrdev);
if (!psd)
return NULL;
GdGetScreenInfo(psd, &sinfo);
gr_pixtype = sinfo.pixtype;
gr_ncolors = sinfo.ncolors;
/* assume no user changable palette entries*/
gr_firstuserpalentry = (int)psd->ncolors;
/* set palette according to system colors and devpalX.c*/
switch((int)psd->ncolors) {
#if !defined(NOSTDPAL1) /* don't require stdpal1 if not needed */
case 2: /* 1bpp*/
{
extern MWPALENTRY mwstdpal1[2];
stdpal = mwstdpal1;
}
break;
#endif
#if !defined(NOSTDPAL2) /* don't require stdpal2 if not needed */
case 4: /* 2bpp*/
{
extern MWPALENTRY mwstdpal2[4];
stdpal = mwstdpal2;
}
break;
#endif
#if !defined(NOSTDPAL4)
/* don't require stdpal4 if not needed */
case 8: /* 3bpp - not fully supported*/
case 16: /* 4bpp*/
{
extern MWPALENTRY mwstdpal4[16];
stdpal = mwstdpal4;
}
break;
#endif
#if !defined(NOSTDPAL8) /* don't require large stdpal8 if not needed */
case 256: /* 8bpp*/
{
extern MWPALENTRY mwstdpal8[256];
#if xxxALPHABLEND
/* don't change uniform palette if alpha blending*/
gr_firstuserpalentry = 256;
#else
/* start after last system-reserved color*/
gr_firstuserpalentry = FIRSTUSERPALENTRY;
#endif
stdpal = mwstdpal8;
}
break;
#endif /* !defined(NOSTDPAL8)*/
default: /* truecolor*/
/* no palette*/
gr_firstuserpalentry = 0;
stdpal = NULL;
}
/* reset next user palette entry, write hardware palette*/
GdResetPalette();
GdSetPalette(psd, 0, (int)psd->ncolors, stdpal);
#if xxxALPHABLEND
/* one-time create alpha lookup table for 8bpp systems (takes ~1 sec)*/
if(psd->ncolors == 256)
init_alpha_lookup();
#endif
#if !NOFONTSORCLIPPING
/* init local vars*/
GdSetMode(MWMODE_COPY);
GdSetForeground(GdFindColor(MWRGB(255, 255, 255))); /* WHITE*/
GdSetBackground(GdFindColor(MWRGB(0, 0, 0))); /* BLACK*/
GdSetUseBackground(TRUE);
GdSetFont(GdCreateFont(psd, MWFONT_SYSTEM_VAR, 0, NULL));
#if DYNAMICREGIONS
GdSetClipRegion(psd,
GdAllocRectRegion(0, 0, psd->xvirtres, psd->yvirtres));
#else
GdSetClipRects(psd, 0, NULL);
#endif /* DYNAMICREGIONS*/
#endif /* NOFONTSORCLIPPING*/
/* fill black (actually fill to first palette entry or truecolor 0*/
psd->FillRect(psd, 0, 0, psd->xvirtres-1, psd->yvirtres-1, 0);
return psd;
}
/*
* Setup clip region from device context's associated window or bitmap.
* Memory DC's are always associated with the desktop window, and are
* always visible. Return the DC's hwnd if window is visible.
*/
HWND
MwPrepareDC(HDC hdc)
{
HWND hwnd;
if(!hdc || !hdc->hwnd)
return NULL;
hwnd = hdc->hwnd;
if (hwnd->unmapcount)
return NULL;
/*
* If the window is not the currently clipped one, then
* make it the current one and define its clip rectangles.
*/
if(hdc != cliphdc) {
/* clip memory dc's to the bitmap size*/
if(hdc->psd->flags&PSF_MEMORY) {
#if DYNAMICREGIONS
/* If hdc has a clip region, use it! */
if (hdc->region != NULL && hdc->region->rgn != NULL
&& hdc->region->rgn->size != 0) {
LPRECT rptr = &(hdc->region->rgn->extents);
MWCOORD left, top;
/* Bound left,top to 0,0 if they are negative
* to avoid an assertion later.
*/
left = (rptr->left <= 0) ? 0 : rptr->left;
top = (rptr->top <= 0) ? 0 : rptr->top;
GdSetClipRegion(hdc->psd,
GdAllocRectRegion(rptr->left, rptr->top,
rptr->right, rptr->bottom));
} else {
GdSetClipRegion(hdc->psd,
GdAllocRectRegion(0, 0,
hdc->psd->xvirtres, hdc->psd->yvirtres));
}
#else
static MWCLIPRECT crc = {0, 0, 0, 0};
/* If hdc has a clip region, use it! */
if (hdc->region != NULL && hdc->region->rgn != NULL
&& hdc->region->rgn->size != 0) {
LPRECT rptr = &(hdc->region->rgn->extents);
/* Bound left,top to 0,0 if they are negative
* to avoid an assertion later.
*/
if (rptr->left > 0)
crc.x = rptr->left;
if (rptr->top > 0)
crc.y = rptr->top;
crc.width = rptr->right;
crc.height = rptr->bottom;
} else {
crc.width = hdc->psd->xvirtres;
crc.height = hdc->psd->yvirtres;
}
GdSetClipRects(hdc->psd, 1, &crc);
#endif
} else MwSetClipWindow(hdc);
cliphdc = hdc;
}
return hwnd;
}
/**
* Open low level graphics driver.
*
* @return The screen drawing surface.
*/
PSD
GdOpenScreen(void)
{
PSD psd;
MWPALENTRY * stdpal;
psd = scrdev.Open(&scrdev);
if (!psd)
return NULL;
/* assume no user changable palette entries*/
gr_firstuserpalentry = (int)psd->ncolors;
/* set palette according to system colors and devpalX.c*/
switch((int)psd->ncolors) {
#if !defined(NOSTDPAL1) /* don't require stdpal1 if not needed */
case 2: /* 1bpp*/
{
extern MWPALENTRY mwstdpal1[2];
stdpal = mwstdpal1;
}
break;
#endif
#if !defined(NOSTDPAL2) /* don't require stdpal2 if not needed */
case 4: /* 2bpp*/
{
extern MWPALENTRY mwstdpal2[4];
stdpal = mwstdpal2;
}
break;
#endif
#if !defined(NOSTDPAL4)
/* don't require stdpal4 if not needed */
case 8: /* 3bpp - not fully supported*/
case 16: /* 4bpp*/
{
extern MWPALENTRY mwstdpal4[16];
stdpal = mwstdpal4;
}
break;
#endif
#if !defined(NOSTDPAL8) /* don't require large stdpal8 if not needed */
case 256: /* 8bpp*/
{
extern MWPALENTRY mwstdpal8[256];
#if UNIFORMPALETTE
/* don't change uniform palette if alpha blending*/
gr_firstuserpalentry = 256;
#else
/* start after last system-reserved color*/
gr_firstuserpalentry = FIRSTUSERPALENTRY;
#endif
stdpal = mwstdpal8;
}
break;
#endif /* !defined(NOSTDPAL8)*/
default: /* truecolor*/
/* no palette*/
gr_firstuserpalentry = 0;
stdpal = NULL;
}
/* reset next user palette entry, write hardware palette*/
GdResetPalette();
GdSetPalette(psd, 0, (int)psd->ncolors, stdpal);
/* init local vars*/
GdSetMode(MWROP_COPY);
GdSetFillMode(MWFILL_SOLID); /* Set the fill mode to solid */
GdSetForegroundColor(psd, MWRGB(255, 255, 255)); /* WHITE*/
GdSetBackgroundColor(psd, MWRGB(0, 0, 0)); /* BLACK*/
GdSetUseBackground(TRUE);
/* select first builtin font (usually MWFONT_SYSTEM_VAR)*/
//GdSetFont(GdCreateFont(psd, NULL, 0, 0, NULL));
GdSetDash(0, 0); /* No dashing to start */
GdSetStippleBitmap(0,0,0); /* No stipple to start */
#if !NOCLIPPING
#if DYNAMICREGIONS
GdSetClipRegion(psd, GdAllocRectRegion(0, 0, psd->xvirtres, psd->yvirtres));
#else
GdSetClipRects(psd, 0, NULL);
#endif /* DYNAMICREGIONS*/
#endif /* NOCLIPPING*/
/* fill black (actually fill to first palette entry or truecolor 0*/
psd->FillRect(psd, 0, 0, psd->xvirtres-1, psd->yvirtres-1, 0);
return psd;
}
