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a09e091a JB |
1 | /* |
2 | * | |
3 | * Copyright © 2001 Keith Packard, member of The XFree86 Project, Inc. | |
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 <X11/X.h> | |
29 | #include "scrnintstr.h" | |
30 | #include "windowstr.h" | |
31 | #include <X11/fonts/font.h> | |
32 | #include "dixfontstr.h" | |
33 | #include <X11/fonts/fontstruct.h> | |
34 | #include "mi.h" | |
35 | #include "regionstr.h" | |
36 | #include "globals.h" | |
37 | #include "gcstruct.h" | |
38 | #include "shadow.h" | |
39 | #include "fb.h" | |
40 | ||
41 | /* | |
42 | * These indicate which way the source (shadow) is scanned when | |
43 | * walking the screen in a particular direction | |
44 | */ | |
45 | ||
46 | #define LEFT_TO_RIGHT 1 | |
47 | #define RIGHT_TO_LEFT -1 | |
48 | #define TOP_TO_BOTTOM 2 | |
49 | #define BOTTOM_TO_TOP -2 | |
50 | ||
51 | void | |
52 | shadowUpdateRotatePacked(ScreenPtr pScreen, shadowBufPtr pBuf) | |
53 | { | |
54 | RegionPtr damage = shadowDamage(pBuf); | |
55 | PixmapPtr pShadow = pBuf->pPixmap; | |
56 | int nbox = RegionNumRects(damage); | |
57 | BoxPtr pbox = RegionRects(damage); | |
58 | FbBits *shaBits; | |
59 | FbStride shaStride; | |
60 | int shaBpp; | |
61 | _X_UNUSED int shaXoff, shaYoff; | |
62 | int box_x1, box_x2, box_y1, box_y2; | |
63 | int sha_x1 = 0, sha_y1 = 0; | |
64 | int scr_x1 = 0, scr_x2 = 0, scr_y1 = 0, scr_y2 = 0, scr_w, scr_h; | |
65 | int scr_x, scr_y; | |
66 | int w; | |
67 | int pixelsPerBits; | |
68 | int pixelsMask; | |
69 | FbStride shaStepOverY = 0, shaStepDownY = 0; | |
70 | FbStride shaStepOverX = 0, shaStepDownX = 0; | |
71 | FbBits *shaLine, *sha; | |
72 | int shaHeight = pShadow->drawable.height; | |
73 | int shaWidth = pShadow->drawable.width; | |
74 | FbBits shaMask; | |
75 | int shaFirstShift, shaShift; | |
76 | int o_x_dir; | |
77 | int o_y_dir; | |
78 | int x_dir; | |
79 | int y_dir; | |
80 | ||
81 | fbGetDrawable(&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff, | |
82 | shaYoff); | |
83 | pixelsPerBits = (sizeof(FbBits) * 8) / shaBpp; | |
84 | pixelsMask = ~(pixelsPerBits - 1); | |
85 | shaMask = FbBitsMask(FB_UNIT - shaBpp, shaBpp); | |
86 | /* | |
87 | * Compute rotation related constants to walk the shadow | |
88 | */ | |
89 | o_x_dir = LEFT_TO_RIGHT; | |
90 | o_y_dir = TOP_TO_BOTTOM; | |
91 | if (pBuf->randr & SHADOW_REFLECT_X) | |
92 | o_x_dir = -o_x_dir; | |
93 | if (pBuf->randr & SHADOW_REFLECT_Y) | |
94 | o_y_dir = -o_y_dir; | |
95 | switch (pBuf->randr & (SHADOW_ROTATE_ALL)) { | |
96 | case SHADOW_ROTATE_0: /* upper left shadow -> upper left screen */ | |
97 | default: | |
98 | x_dir = o_x_dir; | |
99 | y_dir = o_y_dir; | |
100 | break; | |
101 | case SHADOW_ROTATE_90: /* upper right shadow -> upper left screen */ | |
102 | x_dir = o_y_dir; | |
103 | y_dir = -o_x_dir; | |
104 | break; | |
105 | case SHADOW_ROTATE_180: /* lower right shadow -> upper left screen */ | |
106 | x_dir = -o_x_dir; | |
107 | y_dir = -o_y_dir; | |
108 | break; | |
109 | case SHADOW_ROTATE_270: /* lower left shadow -> upper left screen */ | |
110 | x_dir = -o_y_dir; | |
111 | y_dir = o_x_dir; | |
112 | break; | |
113 | } | |
114 | switch (x_dir) { | |
115 | case LEFT_TO_RIGHT: | |
116 | shaStepOverX = shaBpp; | |
117 | shaStepOverY = 0; | |
118 | break; | |
119 | case TOP_TO_BOTTOM: | |
120 | shaStepOverX = 0; | |
121 | shaStepOverY = shaStride; | |
122 | break; | |
123 | case RIGHT_TO_LEFT: | |
124 | shaStepOverX = -shaBpp; | |
125 | shaStepOverY = 0; | |
126 | break; | |
127 | case BOTTOM_TO_TOP: | |
128 | shaStepOverX = 0; | |
129 | shaStepOverY = -shaStride; | |
130 | break; | |
131 | } | |
132 | switch (y_dir) { | |
133 | case TOP_TO_BOTTOM: | |
134 | shaStepDownX = 0; | |
135 | shaStepDownY = shaStride; | |
136 | break; | |
137 | case RIGHT_TO_LEFT: | |
138 | shaStepDownX = -shaBpp; | |
139 | shaStepDownY = 0; | |
140 | break; | |
141 | case BOTTOM_TO_TOP: | |
142 | shaStepDownX = 0; | |
143 | shaStepDownY = -shaStride; | |
144 | break; | |
145 | case LEFT_TO_RIGHT: | |
146 | shaStepDownX = shaBpp; | |
147 | shaStepDownY = 0; | |
148 | break; | |
149 | } | |
150 | ||
151 | while (nbox--) { | |
152 | box_x1 = pbox->x1; | |
153 | box_y1 = pbox->y1; | |
154 | box_x2 = pbox->x2; | |
155 | box_y2 = pbox->y2; | |
156 | pbox++; | |
157 | ||
158 | /* | |
159 | * Compute screen and shadow locations for this box | |
160 | */ | |
161 | switch (x_dir) { | |
162 | case LEFT_TO_RIGHT: | |
163 | scr_x1 = box_x1 & pixelsMask; | |
164 | scr_x2 = (box_x2 + pixelsPerBits - 1) & pixelsMask; | |
165 | ||
166 | sha_x1 = scr_x1; | |
167 | break; | |
168 | case TOP_TO_BOTTOM: | |
169 | scr_x1 = box_y1 & pixelsMask; | |
170 | scr_x2 = (box_y2 + pixelsPerBits - 1) & pixelsMask; | |
171 | ||
172 | sha_y1 = scr_x1; | |
173 | break; | |
174 | case RIGHT_TO_LEFT: | |
175 | scr_x1 = (shaWidth - box_x2) & pixelsMask; | |
176 | scr_x2 = (shaWidth - box_x1 + pixelsPerBits - 1) & pixelsMask; | |
177 | ||
178 | sha_x1 = (shaWidth - scr_x1 - 1); | |
179 | break; | |
180 | case BOTTOM_TO_TOP: | |
181 | scr_x1 = (shaHeight - box_y2) & pixelsMask; | |
182 | scr_x2 = (shaHeight - box_y1 + pixelsPerBits - 1) & pixelsMask; | |
183 | ||
184 | sha_y1 = (shaHeight - scr_x1 - 1); | |
185 | break; | |
186 | } | |
187 | switch (y_dir) { | |
188 | case TOP_TO_BOTTOM: | |
189 | scr_y1 = box_y1; | |
190 | scr_y2 = box_y2; | |
191 | ||
192 | sha_y1 = scr_y1; | |
193 | break; | |
194 | case RIGHT_TO_LEFT: | |
195 | scr_y1 = (shaWidth - box_x2); | |
196 | scr_y2 = (shaWidth - box_x1); | |
197 | ||
198 | sha_x1 = box_x2 - 1; | |
199 | break; | |
200 | case BOTTOM_TO_TOP: | |
201 | scr_y1 = shaHeight - box_y2; | |
202 | scr_y2 = shaHeight - box_y1; | |
203 | ||
204 | sha_y1 = box_y2 - 1; | |
205 | break; | |
206 | case LEFT_TO_RIGHT: | |
207 | scr_y1 = box_x1; | |
208 | scr_y2 = box_x2; | |
209 | ||
210 | sha_x1 = box_x1; | |
211 | break; | |
212 | } | |
213 | scr_w = ((scr_x2 - scr_x1) * shaBpp) >> FB_SHIFT; | |
214 | scr_h = scr_y2 - scr_y1; | |
215 | scr_y = scr_y1; | |
216 | ||
217 | /* shift amount for first pixel on screen */ | |
218 | shaFirstShift = FB_UNIT - ((sha_x1 * shaBpp) & FB_MASK) - shaBpp; | |
219 | ||
220 | /* pointer to shadow data first placed on screen */ | |
221 | shaLine = (shaBits + | |
222 | sha_y1 * shaStride + ((sha_x1 * shaBpp) >> FB_SHIFT)); | |
223 | ||
224 | /* | |
225 | * Copy the bits, always write across the physical frame buffer | |
226 | * to take advantage of write combining. | |
227 | */ | |
228 | while (scr_h--) { | |
229 | int p; | |
230 | FbBits bits; | |
231 | FbBits *win; | |
232 | int i; | |
233 | CARD32 winSize; | |
234 | ||
235 | sha = shaLine; | |
236 | shaShift = shaFirstShift; | |
237 | w = scr_w; | |
238 | scr_x = scr_x1 * shaBpp >> FB_SHIFT; | |
239 | ||
240 | while (w) { | |
241 | /* | |
242 | * Map some of this line | |
243 | */ | |
244 | win = (FbBits *) (*pBuf->window) (pScreen, | |
245 | scr_y, | |
246 | scr_x << 2, | |
247 | SHADOW_WINDOW_WRITE, | |
248 | &winSize, pBuf->closure); | |
249 | i = (winSize >> 2); | |
250 | if (i > w) | |
251 | i = w; | |
252 | w -= i; | |
253 | scr_x += i; | |
254 | /* | |
255 | * Copy the portion of the line mapped | |
256 | */ | |
257 | while (i--) { | |
258 | bits = 0; | |
259 | p = pixelsPerBits; | |
260 | /* | |
261 | * Build one word of output from multiple inputs | |
262 | * | |
263 | * Note that for 90/270 rotations, this will walk | |
264 | * down the shadow hitting each scanline once. | |
265 | * This is probably not very efficient. | |
266 | */ | |
267 | while (p--) { | |
268 | bits = FbScrLeft(bits, shaBpp); | |
269 | bits |= FbScrRight(*sha, shaShift) & shaMask; | |
270 | ||
271 | shaShift -= shaStepOverX; | |
272 | if (shaShift >= FB_UNIT) { | |
273 | shaShift -= FB_UNIT; | |
274 | sha--; | |
275 | } | |
276 | else if (shaShift < 0) { | |
277 | shaShift += FB_UNIT; | |
278 | sha++; | |
279 | } | |
280 | sha += shaStepOverY; | |
281 | } | |
282 | *win++ = bits; | |
283 | } | |
284 | } | |
285 | scr_y++; | |
286 | shaFirstShift -= shaStepDownX; | |
287 | if (shaFirstShift >= FB_UNIT) { | |
288 | shaFirstShift -= FB_UNIT; | |
289 | shaLine--; | |
290 | } | |
291 | else if (shaFirstShift < 0) { | |
292 | shaFirstShift += FB_UNIT; | |
293 | shaLine++; | |
294 | } | |
295 | shaLine += shaStepDownY; | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | shadowUpdateProc | |
301 | shadowUpdateRotatePackedWeak(void) | |
302 | { | |
303 | return shadowUpdateRotatePacked; | |
304 | } |