| 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 | } |