mipict.c revision 6747b715 
1/*
2 *
3 * Copyright © 1999 Keith Packard
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of Keith Packard not be used in
10 * advertising or publicity pertaining to distribution of the software without
11 * specific, written prior permission.  Keith Packard makes no
12 * representations about the suitability of this software for any purpose.  It
13 * is provided "as is" without express or implied warranty.
14 *
15 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21 * PERFORMANCE OF THIS SOFTWARE.
22 */
23
24#ifdef HAVE_DIX_CONFIG_H
25#include <dix-config.h>
26#endif
27
28#include "scrnintstr.h"
29#include "gcstruct.h"
30#include "pixmapstr.h"
31#include "windowstr.h"
32#include "mi.h"
33#include "picturestr.h"
34#include "mipict.h"
35
36#ifndef __GNUC__
37#define __inline
38#endif
39
40int
41miCreatePicture (PicturePtr pPicture)
42{
43    return Success;
44}
45
46void
47miDestroyPicture (PicturePtr pPicture)
48{
49    if (pPicture->freeCompClip)
50	RegionDestroy(pPicture->pCompositeClip);
51}
52
53void
54miDestroyPictureClip (PicturePtr pPicture)
55{
56    switch (pPicture->clientClipType) {
57    case CT_NONE:
58	return;
59    case CT_PIXMAP:
60	(*pPicture->pDrawable->pScreen->DestroyPixmap) ((PixmapPtr) (pPicture->clientClip));
61	break;
62    default:
63	/*
64	 * we know we'll never have a list of rectangles, since ChangeClip
65	 * immediately turns them into a region
66	 */
67	RegionDestroy(pPicture->clientClip);
68	break;
69    }
70    pPicture->clientClip = NULL;
71    pPicture->clientClipType = CT_NONE;
72}
73
74int
75miChangePictureClip (PicturePtr    pPicture,
76		     int	   type,
77		     pointer	   value,
78		     int	   n)
79{
80    ScreenPtr		pScreen = pPicture->pDrawable->pScreen;
81    PictureScreenPtr    ps = GetPictureScreen(pScreen);
82    pointer		clientClip;
83    int			clientClipType;
84
85    switch (type) {
86    case CT_PIXMAP:
87	/* convert the pixmap to a region */
88	clientClip = (pointer) BitmapToRegion(pScreen, (PixmapPtr) value);
89	if (!clientClip)
90	    return BadAlloc;
91	clientClipType = CT_REGION;
92	(*pScreen->DestroyPixmap) ((PixmapPtr) value);
93	break;
94    case CT_REGION:
95	clientClip = value;
96	clientClipType = CT_REGION;
97	break;
98    case CT_NONE:
99	clientClip = 0;
100	clientClipType = CT_NONE;
101	break;
102    default:
103	clientClip = (pointer) RegionFromRects(n,
104					       (xRectangle *) value,
105					       type);
106	if (!clientClip)
107	    return BadAlloc;
108	clientClipType = CT_REGION;
109	free(value);
110	break;
111    }
112    (*ps->DestroyPictureClip) (pPicture);
113    pPicture->clientClip = clientClip;
114    pPicture->clientClipType = clientClipType;
115    pPicture->stateChanges |= CPClipMask;
116    return Success;
117}
118
119void
120miChangePicture (PicturePtr pPicture,
121		 Mask       mask)
122{
123    return;
124}
125
126void
127miValidatePicture (PicturePtr pPicture,
128		   Mask       mask)
129{
130    DrawablePtr	    pDrawable = pPicture->pDrawable;
131
132    if ((mask & (CPClipXOrigin|CPClipYOrigin|CPClipMask|CPSubwindowMode)) ||
133	(pDrawable->serialNumber != (pPicture->serialNumber & DRAWABLE_SERIAL_BITS)))
134    {
135	if (pDrawable->type == DRAWABLE_WINDOW)
136	{
137	    WindowPtr       pWin = (WindowPtr) pDrawable;
138	    RegionPtr       pregWin;
139	    Bool            freeTmpClip, freeCompClip;
140
141	    if (pPicture->subWindowMode == IncludeInferiors)
142	    {
143		pregWin = NotClippedByChildren(pWin);
144		freeTmpClip = TRUE;
145	    }
146	    else
147	    {
148		pregWin = &pWin->clipList;
149		freeTmpClip = FALSE;
150	    }
151	    freeCompClip = pPicture->freeCompClip;
152
153	    /*
154	     * if there is no client clip, we can get by with just keeping the
155	     * pointer we got, and remembering whether or not should destroy
156	     * (or maybe re-use) it later.  this way, we avoid unnecessary
157	     * copying of regions.  (this wins especially if many clients clip
158	     * by children and have no client clip.)
159	     */
160	    if (pPicture->clientClipType == CT_NONE)
161	    {
162		if (freeCompClip)
163		    RegionDestroy(pPicture->pCompositeClip);
164		pPicture->pCompositeClip = pregWin;
165		pPicture->freeCompClip = freeTmpClip;
166	    }
167	    else
168	    {
169		/*
170		 * we need one 'real' region to put into the composite clip. if
171		 * pregWin the current composite clip are real, we can get rid of
172		 * one. if pregWin is real and the current composite clip isn't,
173		 * use pregWin for the composite clip. if the current composite
174		 * clip is real and pregWin isn't, use the current composite
175		 * clip. if neither is real, create a new region.
176		 */
177
178		RegionTranslate(pPicture->clientClip,
179				 pDrawable->x + pPicture->clipOrigin.x,
180				 pDrawable->y + pPicture->clipOrigin.y);
181
182		if (freeCompClip)
183		{
184		    RegionIntersect(pPicture->pCompositeClip,
185				     pregWin, pPicture->clientClip);
186		    if (freeTmpClip)
187			RegionDestroy(pregWin);
188		}
189		else if (freeTmpClip)
190		{
191		    RegionIntersect(pregWin, pregWin, pPicture->clientClip);
192		    pPicture->pCompositeClip = pregWin;
193		}
194		else
195		{
196		    pPicture->pCompositeClip = RegionCreate(NullBox, 0);
197		    RegionIntersect(pPicture->pCompositeClip,
198				     pregWin, pPicture->clientClip);
199		}
200		pPicture->freeCompClip = TRUE;
201		RegionTranslate(pPicture->clientClip,
202				 -(pDrawable->x + pPicture->clipOrigin.x),
203				 -(pDrawable->y + pPicture->clipOrigin.y));
204	    }
205	}	/* end of composite clip for a window */
206	else
207	{
208	    BoxRec          pixbounds;
209
210	    /* XXX should we translate by drawable.x/y here ? */
211	    /* If you want pixmaps in offscreen memory, yes */
212	    pixbounds.x1 = pDrawable->x;
213	    pixbounds.y1 = pDrawable->y;
214	    pixbounds.x2 = pDrawable->x + pDrawable->width;
215	    pixbounds.y2 = pDrawable->y + pDrawable->height;
216
217	    if (pPicture->freeCompClip)
218	    {
219		RegionReset(pPicture->pCompositeClip, &pixbounds);
220	    }
221	    else
222	    {
223		pPicture->freeCompClip = TRUE;
224		pPicture->pCompositeClip = RegionCreate(&pixbounds, 1);
225	    }
226
227	    if (pPicture->clientClipType == CT_REGION)
228	    {
229		if(pDrawable->x || pDrawable->y) {
230		    RegionTranslate(pPicture->clientClip,
231				     pDrawable->x + pPicture->clipOrigin.x,
232				     pDrawable->y + pPicture->clipOrigin.y);
233		    RegionIntersect(pPicture->pCompositeClip,
234				     pPicture->pCompositeClip, pPicture->clientClip);
235		    RegionTranslate(pPicture->clientClip,
236				     -(pDrawable->x + pPicture->clipOrigin.x),
237				     -(pDrawable->y + pPicture->clipOrigin.y));
238		} else {
239		    RegionTranslate(pPicture->pCompositeClip,
240				     -pPicture->clipOrigin.x, -pPicture->clipOrigin.y);
241		    RegionIntersect(pPicture->pCompositeClip,
242				     pPicture->pCompositeClip, pPicture->clientClip);
243		    RegionTranslate(pPicture->pCompositeClip,
244				     pPicture->clipOrigin.x, pPicture->clipOrigin.y);
245		}
246	    }
247	}	/* end of composite clip for pixmap */
248    }
249}
250
251int
252miChangePictureTransform (PicturePtr	pPicture,
253			  PictTransform *transform)
254{
255    return Success;
256}
257
258int
259miChangePictureFilter (PicturePtr pPicture,
260		       int	  filter,
261		       xFixed     *params,
262		       int	  nparams)
263{
264    return Success;
265}
266
267#define BOUND(v)	(INT16) ((v) < MINSHORT ? MINSHORT : (v) > MAXSHORT ? MAXSHORT : (v))
268
269static inline pixman_bool_t
270miClipPictureReg (pixman_region16_t *	pRegion,
271		  pixman_region16_t *	pClip,
272		  int		dx,
273		  int		dy)
274{
275    if (pixman_region_n_rects(pRegion) == 1 &&
276	pixman_region_n_rects(pClip) == 1)
277    {
278	pixman_box16_t *  pRbox = pixman_region_rectangles(pRegion, NULL);
279	pixman_box16_t *  pCbox = pixman_region_rectangles(pClip, NULL);
280	int	v;
281
282	if (pRbox->x1 < (v = pCbox->x1 + dx))
283	    pRbox->x1 = BOUND(v);
284	if (pRbox->x2 > (v = pCbox->x2 + dx))
285	    pRbox->x2 = BOUND(v);
286	if (pRbox->y1 < (v = pCbox->y1 + dy))
287	    pRbox->y1 = BOUND(v);
288	if (pRbox->y2 > (v = pCbox->y2 + dy))
289	    pRbox->y2 = BOUND(v);
290	if (pRbox->x1 >= pRbox->x2 ||
291	    pRbox->y1 >= pRbox->y2)
292	{
293	    pixman_region_init (pRegion);
294	}
295    }
296    else if (!pixman_region_not_empty (pClip))
297	return FALSE;
298    else
299    {
300	if (dx || dy)
301	    pixman_region_translate (pRegion, -dx, -dy);
302	if (!pixman_region_intersect (pRegion, pRegion, pClip))
303	    return FALSE;
304	if (dx || dy)
305	    pixman_region_translate(pRegion, dx, dy);
306    }
307    return pixman_region_not_empty(pRegion);
308}
309
310static __inline Bool
311miClipPictureSrc (RegionPtr	pRegion,
312		  PicturePtr	pPicture,
313		  int		dx,
314		  int		dy)
315{
316    if (pPicture->clientClipType != CT_NONE)
317    {
318	Bool result;
319
320	pixman_region_translate ( pPicture->clientClip,
321				  pPicture->clipOrigin.x + dx,
322				  pPicture->clipOrigin.y + dy);
323
324	result = RegionIntersect(pRegion, pRegion, pPicture->clientClip);
325
326	pixman_region_translate ( pPicture->clientClip,
327				  - (pPicture->clipOrigin.x + dx),
328				  - (pPicture->clipOrigin.y + dy));
329
330	if (!result)
331	    return FALSE;
332    }
333    return TRUE;
334}
335
336void
337miCompositeSourceValidate (PicturePtr	pPicture,
338			   INT16	x,
339			   INT16	y,
340			   CARD16	width,
341			   CARD16	height)
342{
343    DrawablePtr	pDrawable = pPicture->pDrawable;
344    ScreenPtr	pScreen;
345
346    if (!pDrawable)
347        return;
348
349    pScreen = pDrawable->pScreen;
350
351    if (pScreen->SourceValidate)
352    {
353	if (pPicture->transform)
354	{
355	    xPoint	    points[4];
356	    int		    i;
357	    int		    xmin, ymin, xmax, ymax;
358
359#define VectorSet(i,_x,_y) { points[i].x = _x; points[i].y = _y; }
360	    VectorSet (0, x, y);
361	    VectorSet (1, x + width, y);
362	    VectorSet (2, x, y + height);
363	    VectorSet (3, x + width, y + height);
364	    xmin = ymin = 32767;
365	    xmax = ymax = -32737;
366	    for (i = 0; i < 4; i++)
367	    {
368		PictVector  t;
369		t.vector[0] = IntToxFixed (points[i].x);
370		t.vector[1] = IntToxFixed (points[i].y);
371		t.vector[2] = xFixed1;
372		if (pixman_transform_point (pPicture->transform, &t))
373		{
374		    int	tx = xFixedToInt (t.vector[0]);
375		    int ty = xFixedToInt (t.vector[1]);
376		    if (tx < xmin) xmin = tx;
377		    if (tx > xmax) xmax = tx;
378		    if (ty < ymin) ymin = ty;
379		    if (ty > ymax) ymax = ty;
380		}
381	    }
382	    x = xmin;
383	    y = ymin;
384	    width = xmax - xmin;
385	    height = ymax - ymin;
386	}
387        x += pPicture->pDrawable->x;
388        y += pPicture->pDrawable->y;
389	(*pScreen->SourceValidate) (pDrawable, x, y, width, height);
390    }
391}
392
393/*
394 * returns FALSE if the final region is empty.  Indistinguishable from
395 * an allocation failure, but rendering ignores those anyways.
396 */
397
398Bool
399miComputeCompositeRegion (RegionPtr	pRegion,
400			  PicturePtr	pSrc,
401			  PicturePtr	pMask,
402			  PicturePtr	pDst,
403			  INT16		xSrc,
404			  INT16		ySrc,
405			  INT16		xMask,
406			  INT16		yMask,
407			  INT16		xDst,
408			  INT16		yDst,
409			  CARD16	width,
410			  CARD16	height)
411{
412
413    int		v;
414
415    pRegion->extents.x1 = xDst;
416    v = xDst + width;
417    pRegion->extents.x2 = BOUND(v);
418    pRegion->extents.y1 = yDst;
419    v = yDst + height;
420    pRegion->extents.y2 = BOUND(v);
421    pRegion->data = 0;
422    /* Check for empty operation */
423    if (pRegion->extents.x1 >= pRegion->extents.x2 ||
424	pRegion->extents.y1 >= pRegion->extents.y2)
425    {
426	pixman_region_init (pRegion);
427	return FALSE;
428    }
429    /* clip against dst */
430    if (!miClipPictureReg (pRegion, pDst->pCompositeClip, 0, 0))
431    {
432	pixman_region_fini (pRegion);
433	return FALSE;
434    }
435    if (pDst->alphaMap)
436    {
437	if (!miClipPictureReg (pRegion, pDst->alphaMap->pCompositeClip,
438			       -pDst->alphaOrigin.x,
439			       -pDst->alphaOrigin.y))
440	{
441	    pixman_region_fini (pRegion);
442	    return FALSE;
443	}
444    }
445    /* clip against src */
446    if (!miClipPictureSrc (pRegion, pSrc, xDst - xSrc, yDst - ySrc))
447    {
448	pixman_region_fini (pRegion);
449	return FALSE;
450    }
451    if (pSrc->alphaMap)
452    {
453	if (!miClipPictureSrc (pRegion, pSrc->alphaMap,
454			       xDst - (xSrc - pSrc->alphaOrigin.x),
455			       yDst - (ySrc - pSrc->alphaOrigin.y)))
456	{
457	    pixman_region_fini (pRegion);
458	    return FALSE;
459	}
460    }
461    /* clip against mask */
462    if (pMask)
463    {
464	if (!miClipPictureSrc (pRegion, pMask, xDst - xMask, yDst - yMask))
465	{
466	    pixman_region_fini (pRegion);
467	    return FALSE;
468	}
469	if (pMask->alphaMap)
470	{
471	    if (!miClipPictureSrc (pRegion, pMask->alphaMap,
472				   xDst - (xMask - pMask->alphaOrigin.x),
473				   yDst - (yMask - pMask->alphaOrigin.y)))
474	    {
475		pixman_region_fini (pRegion);
476		return FALSE;
477	    }
478	}
479    }
480
481
482    miCompositeSourceValidate (pSrc, xSrc, ySrc, width, height);
483    if (pMask)
484	miCompositeSourceValidate (pMask, xMask, yMask, width, height);
485
486    return TRUE;
487}
488
489void
490miRenderColorToPixel (PictFormatPtr format,
491		      xRenderColor  *color,
492		      CARD32	    *pixel)
493{
494    CARD32	    r, g, b, a;
495    miIndexedPtr    pIndexed;
496
497    switch (format->type) {
498    case PictTypeDirect:
499	r = color->red >> (16 - Ones (format->direct.redMask));
500	g = color->green >> (16 - Ones (format->direct.greenMask));
501	b = color->blue >> (16 - Ones (format->direct.blueMask));
502	a = color->alpha >> (16 - Ones (format->direct.alphaMask));
503	r = r << format->direct.red;
504	g = g << format->direct.green;
505	b = b << format->direct.blue;
506	a = a << format->direct.alpha;
507	*pixel = r|g|b|a;
508	break;
509    case PictTypeIndexed:
510	pIndexed = (miIndexedPtr) (format->index.devPrivate);
511	if (pIndexed->color)
512	{
513	    r = color->red >> 11;
514	    g = color->green >> 11;
515	    b = color->blue >> 11;
516	    *pixel = miIndexToEnt15 (pIndexed, (r << 10) | (g << 5) | b);
517	}
518	else
519	{
520	    r = color->red >> 8;
521	    g = color->green >> 8;
522	    b = color->blue >> 8;
523	    *pixel = miIndexToEntY24 (pIndexed, (r << 16) | (g << 8) | b);
524	}
525	break;
526    }
527}
528
529static CARD16
530miFillColor (CARD32 pixel, int bits)
531{
532    while (bits < 16)
533    {
534	pixel |= pixel << bits;
535	bits <<= 1;
536    }
537    return (CARD16) pixel;
538}
539
540Bool
541miIsSolidAlpha (PicturePtr pSrc)
542{
543    ScreenPtr	pScreen;
544    char	line[1];
545
546    if (!pSrc->pDrawable)
547        return FALSE;
548
549    pScreen = pSrc->pDrawable->pScreen;
550
551    /* Alpha-only */
552    if (PICT_FORMAT_TYPE (pSrc->format) != PICT_TYPE_A)
553	return FALSE;
554    /* repeat */
555    if (!pSrc->repeat)
556	return FALSE;
557    /* 1x1 */
558    if (pSrc->pDrawable->width != 1 || pSrc->pDrawable->height != 1)
559	return FALSE;
560    line[0] = 1;
561    (*pScreen->GetImage) (pSrc->pDrawable, 0, 0, 1, 1, ZPixmap, ~0L, line);
562    switch (pSrc->pDrawable->bitsPerPixel) {
563    case 1:
564	return (CARD8) line[0] == 1 || (CARD8) line[0] == 0x80;
565    case 4:
566	return (CARD8) line[0] == 0xf || (CARD8) line[0] == 0xf0;
567    case 8:
568	return (CARD8) line[0] == 0xff;
569    default:
570	return FALSE;
571    }
572}
573
574void
575miRenderPixelToColor (PictFormatPtr format,
576		      CARD32	    pixel,
577		      xRenderColor  *color)
578{
579    CARD32	    r, g, b, a;
580    miIndexedPtr    pIndexed;
581
582    switch (format->type) {
583    case PictTypeDirect:
584	r = (pixel >> format->direct.red) & format->direct.redMask;
585	g = (pixel >> format->direct.green) & format->direct.greenMask;
586	b = (pixel >> format->direct.blue) & format->direct.blueMask;
587	a = (pixel >> format->direct.alpha) & format->direct.alphaMask;
588	color->red = miFillColor (r, Ones (format->direct.redMask));
589	color->green = miFillColor (g, Ones (format->direct.greenMask));
590	color->blue = miFillColor (b, Ones (format->direct.blueMask));
591	color->alpha = miFillColor (a, Ones (format->direct.alphaMask));
592	break;
593    case PictTypeIndexed:
594	pIndexed = (miIndexedPtr) (format->index.devPrivate);
595	pixel = pIndexed->rgba[pixel & (MI_MAX_INDEXED-1)];
596	r = (pixel >> 16) & 0xff;
597	g = (pixel >>  8) & 0xff;
598	b = (pixel      ) & 0xff;
599	color->red = miFillColor (r, 8);
600	color->green = miFillColor (g, 8);
601	color->blue = miFillColor (b, 8);
602	color->alpha = 0xffff;
603	break;
604    }
605}
606
607Bool
608miPictureInit (ScreenPtr pScreen, PictFormatPtr formats, int nformats)
609{
610    PictureScreenPtr    ps;
611
612    if (!PictureInit (pScreen, formats, nformats))
613	return FALSE;
614    ps = GetPictureScreen(pScreen);
615    ps->CreatePicture = miCreatePicture;
616    ps->DestroyPicture = miDestroyPicture;
617    ps->ChangePictureClip = miChangePictureClip;
618    ps->DestroyPictureClip = miDestroyPictureClip;
619    ps->ChangePicture = miChangePicture;
620    ps->ValidatePicture = miValidatePicture;
621    ps->InitIndexed = miInitIndexed;
622    ps->CloseIndexed = miCloseIndexed;
623    ps->UpdateIndexed = miUpdateIndexed;
624    ps->ChangePictureTransform = miChangePictureTransform;
625    ps->ChangePictureFilter = miChangePictureFilter;
626    ps->RealizeGlyph = miRealizeGlyph;
627    ps->UnrealizeGlyph = miUnrealizeGlyph;
628
629    /* MI rendering routines */
630    ps->Composite	= 0;			/* requires DDX support */
631    ps->Glyphs		= miGlyphs;
632    ps->CompositeRects	= miCompositeRects;
633    ps->Trapezoids	= miTrapezoids;
634    ps->Triangles	= miTriangles;
635    ps->TriStrip	= miTriStrip;
636    ps->TriFan		= miTriFan;
637
638    ps->RasterizeTrapezoid = 0;			/* requires DDX support */
639    ps->AddTraps	= 0;			/* requires DDX support */
640    ps->AddTriangles	= 0;			/* requires DDX support */
641
642    return TRUE;
643}
644