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a09e091a JB |
1 | /* |
2 | * Copyright © 1998 Keith Packard | |
3 | * | |
4 | * Permission to use, copy, modify, distribute, and sell this software and its | |
5 | * documentation for any purpose is hereby granted without fee, provided that | |
6 | * the above copyright notice appear in all copies and that both that | |
7 | * copyright notice and this permission notice appear in supporting | |
8 | * documentation, and that the name of Keith Packard not be used in | |
9 | * advertising or publicity pertaining to distribution of the software without | |
10 | * specific, written prior permission. Keith Packard makes no | |
11 | * representations about the suitability of this software for any purpose. It | |
12 | * is provided "as is" without express or implied warranty. | |
13 | * | |
14 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
16 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR | |
20 | * PERFORMANCE OF THIS SOFTWARE. | |
21 | */ | |
22 | ||
23 | #ifdef HAVE_DIX_CONFIG_H | |
24 | #include <dix-config.h> | |
25 | #endif | |
26 | ||
27 | #include <stdlib.h> | |
28 | ||
29 | #include "fb.h" | |
30 | ||
31 | const GCFuncs fbGCFuncs = { | |
32 | fbValidateGC, | |
33 | miChangeGC, | |
34 | miCopyGC, | |
35 | miDestroyGC, | |
36 | miChangeClip, | |
37 | miDestroyClip, | |
38 | miCopyClip, | |
39 | }; | |
40 | ||
41 | const GCOps fbGCOps = { | |
42 | fbFillSpans, | |
43 | fbSetSpans, | |
44 | fbPutImage, | |
45 | fbCopyArea, | |
46 | fbCopyPlane, | |
47 | fbPolyPoint, | |
48 | fbPolyLine, | |
49 | fbPolySegment, | |
50 | fbPolyRectangle, | |
51 | fbPolyArc, | |
52 | miFillPolygon, | |
53 | fbPolyFillRect, | |
54 | fbPolyFillArc, | |
55 | miPolyText8, | |
56 | miPolyText16, | |
57 | miImageText8, | |
58 | miImageText16, | |
59 | fbImageGlyphBlt, | |
60 | fbPolyGlyphBlt, | |
61 | fbPushPixels | |
62 | }; | |
63 | ||
64 | Bool | |
65 | fbCreateGC(GCPtr pGC) | |
66 | { | |
67 | pGC->ops = (GCOps *) &fbGCOps; | |
68 | pGC->funcs = (GCFuncs *) &fbGCFuncs; | |
69 | ||
70 | /* fb wants to translate before scan conversion */ | |
71 | pGC->miTranslate = 1; | |
72 | pGC->fExpose = 1; | |
73 | ||
74 | fbGetGCPrivate(pGC)->bpp = BitsPerPixel(pGC->depth); | |
75 | return TRUE; | |
76 | } | |
77 | ||
78 | /* | |
79 | * Pad pixmap to FB_UNIT bits wide | |
80 | */ | |
81 | void | |
82 | fbPadPixmap(PixmapPtr pPixmap) | |
83 | { | |
84 | int width; | |
85 | FbBits *bits; | |
86 | FbBits b; | |
87 | FbBits mask; | |
88 | int height; | |
89 | int w; | |
90 | int stride; | |
91 | int bpp; | |
92 | _X_UNUSED int xOff, yOff; | |
93 | ||
94 | fbGetDrawable(&pPixmap->drawable, bits, stride, bpp, xOff, yOff); | |
95 | ||
96 | width = pPixmap->drawable.width * pPixmap->drawable.bitsPerPixel; | |
97 | height = pPixmap->drawable.height; | |
98 | mask = FbBitsMask(0, width); | |
99 | while (height--) { | |
100 | b = READ(bits) & mask; | |
101 | w = width; | |
102 | while (w < FB_UNIT) { | |
103 | b = b | FbScrRight(b, w); | |
104 | w <<= 1; | |
105 | } | |
106 | WRITE(bits, b); | |
107 | bits += stride; | |
108 | } | |
109 | ||
110 | fbFinishAccess(&pPixmap->drawable); | |
111 | } | |
112 | ||
113 | /* | |
114 | * Verify that 'bits' repeats every 'len' bits | |
115 | */ | |
116 | static Bool | |
117 | fbBitsRepeat(FbBits bits, int len, int width) | |
118 | { | |
119 | FbBits mask = FbBitsMask(0, len); | |
120 | FbBits orig = bits & mask; | |
121 | int i; | |
122 | ||
123 | if (width > FB_UNIT) | |
124 | width = FB_UNIT; | |
125 | for (i = 0; i < width / len; i++) { | |
126 | if ((bits & mask) != orig) | |
127 | return FALSE; | |
128 | bits = FbScrLeft(bits, len); | |
129 | } | |
130 | return TRUE; | |
131 | } | |
132 | ||
133 | /* | |
134 | * Check whether an entire bitmap line is a repetition of | |
135 | * the first 'len' bits | |
136 | */ | |
137 | static Bool | |
138 | fbLineRepeat(FbBits * bits, int len, int width) | |
139 | { | |
140 | FbBits first = bits[0]; | |
141 | ||
142 | if (!fbBitsRepeat(first, len, width)) | |
143 | return FALSE; | |
144 | width = (width + FB_UNIT - 1) >> FB_SHIFT; | |
145 | bits++; | |
146 | while (--width) | |
147 | if (READ(bits) != first) | |
148 | return FALSE; | |
149 | return TRUE; | |
150 | } | |
151 | ||
152 | /* | |
153 | * The even stipple code wants the first FB_UNIT/bpp bits on | |
154 | * each scanline to represent the entire stipple | |
155 | */ | |
156 | static Bool | |
157 | fbCanEvenStipple(PixmapPtr pStipple, int bpp) | |
158 | { | |
159 | int len = FB_UNIT / bpp; | |
160 | FbBits *bits; | |
161 | int stride; | |
162 | int stip_bpp; | |
163 | _X_UNUSED int stipXoff, stipYoff; | |
164 | int h; | |
165 | ||
166 | /* can't even stipple 24bpp drawables */ | |
167 | if ((bpp & (bpp - 1)) != 0) | |
168 | return FALSE; | |
169 | /* make sure the stipple width is a multiple of the even stipple width */ | |
170 | if (pStipple->drawable.width % len != 0) | |
171 | return FALSE; | |
172 | fbGetDrawable(&pStipple->drawable, bits, stride, stip_bpp, stipXoff, | |
173 | stipYoff); | |
174 | h = pStipple->drawable.height; | |
175 | /* check to see that the stipple repeats horizontally */ | |
176 | while (h--) { | |
177 | if (!fbLineRepeat(bits, len, pStipple->drawable.width)) { | |
178 | fbFinishAccess(&pStipple->drawable); | |
179 | return FALSE; | |
180 | } | |
181 | bits += stride; | |
182 | } | |
183 | fbFinishAccess(&pStipple->drawable); | |
184 | return TRUE; | |
185 | } | |
186 | ||
187 | void | |
188 | fbValidateGC(GCPtr pGC, unsigned long changes, DrawablePtr pDrawable) | |
189 | { | |
190 | FbGCPrivPtr pPriv = fbGetGCPrivate(pGC); | |
191 | FbBits mask; | |
192 | ||
193 | /* | |
194 | * if the client clip is different or moved OR the subwindowMode has | |
195 | * changed OR the window's clip has changed since the last validation | |
196 | * we need to recompute the composite clip | |
197 | */ | |
198 | ||
199 | if ((changes & | |
200 | (GCClipXOrigin | GCClipYOrigin | GCClipMask | GCSubwindowMode)) || | |
201 | (pDrawable->serialNumber != (pGC->serialNumber & DRAWABLE_SERIAL_BITS)) | |
202 | ) { | |
203 | miComputeCompositeClip(pGC, pDrawable); | |
204 | } | |
205 | ||
206 | if (pPriv->bpp != pDrawable->bitsPerPixel) { | |
207 | changes |= GCStipple | GCForeground | GCBackground | GCPlaneMask; | |
208 | pPriv->bpp = pDrawable->bitsPerPixel; | |
209 | } | |
210 | if ((changes & GCTile) && fbGetRotatedPixmap(pGC)) { | |
211 | (*pGC->pScreen->DestroyPixmap) (fbGetRotatedPixmap(pGC)); | |
212 | fbGetRotatedPixmap(pGC) = 0; | |
213 | } | |
214 | ||
215 | if (pGC->fillStyle == FillTiled) { | |
216 | PixmapPtr pOldTile, pNewTile; | |
217 | ||
218 | pOldTile = pGC->tile.pixmap; | |
219 | if (pOldTile->drawable.bitsPerPixel != pDrawable->bitsPerPixel) { | |
220 | pNewTile = fbGetRotatedPixmap(pGC); | |
221 | if (!pNewTile || | |
222 | pNewTile->drawable.bitsPerPixel != pDrawable->bitsPerPixel) { | |
223 | if (pNewTile) | |
224 | (*pGC->pScreen->DestroyPixmap) (pNewTile); | |
225 | pNewTile = | |
226 | fb24_32ReformatTile(pOldTile, pDrawable->bitsPerPixel); | |
227 | } | |
228 | if (pNewTile) { | |
229 | fbGetRotatedPixmap(pGC) = pOldTile; | |
230 | pGC->tile.pixmap = pNewTile; | |
231 | changes |= GCTile; | |
232 | } | |
233 | } | |
234 | } | |
235 | if (changes & GCTile) { | |
236 | if (!pGC->tileIsPixel && | |
237 | FbEvenTile(pGC->tile.pixmap->drawable.width * | |
238 | pDrawable->bitsPerPixel)) | |
239 | fbPadPixmap(pGC->tile.pixmap); | |
240 | } | |
241 | if (changes & GCStipple) { | |
242 | pPriv->evenStipple = FALSE; | |
243 | ||
244 | if (pGC->stipple) { | |
245 | ||
246 | /* can we do an even stipple ?? */ | |
247 | if (FbEvenStip(pGC->stipple->drawable.width, | |
248 | pDrawable->bitsPerPixel) && | |
249 | (fbCanEvenStipple(pGC->stipple, pDrawable->bitsPerPixel))) | |
250 | pPriv->evenStipple = TRUE; | |
251 | ||
252 | if (pGC->stipple->drawable.width * pDrawable->bitsPerPixel < | |
253 | FB_UNIT) | |
254 | fbPadPixmap(pGC->stipple); | |
255 | } | |
256 | } | |
257 | /* | |
258 | * Recompute reduced rop values | |
259 | */ | |
260 | if (changes & (GCForeground | GCBackground | GCPlaneMask | GCFunction)) { | |
261 | int s; | |
262 | FbBits depthMask; | |
263 | ||
264 | mask = FbFullMask(pDrawable->bitsPerPixel); | |
265 | depthMask = FbFullMask(pDrawable->depth); | |
266 | ||
267 | pPriv->fg = pGC->fgPixel & mask; | |
268 | pPriv->bg = pGC->bgPixel & mask; | |
269 | ||
270 | if ((pGC->planemask & depthMask) == depthMask) | |
271 | pPriv->pm = mask; | |
272 | else | |
273 | pPriv->pm = pGC->planemask & mask; | |
274 | ||
275 | s = pDrawable->bitsPerPixel; | |
276 | while (s < FB_UNIT) { | |
277 | pPriv->fg |= pPriv->fg << s; | |
278 | pPriv->bg |= pPriv->bg << s; | |
279 | pPriv->pm |= pPriv->pm << s; | |
280 | s <<= 1; | |
281 | } | |
282 | pPriv->and = fbAnd(pGC->alu, pPriv->fg, pPriv->pm); | |
283 | pPriv->xor = fbXor(pGC->alu, pPriv->fg, pPriv->pm); | |
284 | pPriv->bgand = fbAnd(pGC->alu, pPriv->bg, pPriv->pm); | |
285 | pPriv->bgxor = fbXor(pGC->alu, pPriv->bg, pPriv->pm); | |
286 | } | |
287 | if (changes & GCDashList) { | |
288 | unsigned short n = pGC->numInDashList; | |
289 | unsigned char *dash = pGC->dash; | |
290 | unsigned int dashLength = 0; | |
291 | ||
292 | while (n--) | |
293 | dashLength += (unsigned int) *dash++; | |
294 | pPriv->dashLength = dashLength; | |
295 | } | |
296 | } |