| 1 | /* |
| 2 | * Copyright © 2000 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 <X11/X.h> |
| 30 | #include "scrnintstr.h" |
| 31 | #include "windowstr.h" |
| 32 | #include "dixfontstr.h" |
| 33 | #include "mi.h" |
| 34 | #include "regionstr.h" |
| 35 | #include "globals.h" |
| 36 | #include "gcstruct.h" |
| 37 | #include "shadow.h" |
| 38 | |
| 39 | static DevPrivateKeyRec shadowScrPrivateKeyRec; |
| 40 | |
| 41 | #define shadowScrPrivateKey (&shadowScrPrivateKeyRec) |
| 42 | |
| 43 | #define wrap(priv, real, mem) {\ |
| 44 | priv->mem = real->mem; \ |
| 45 | real->mem = shadow##mem; \ |
| 46 | } |
| 47 | |
| 48 | #define unwrap(priv, real, mem) {\ |
| 49 | real->mem = priv->mem; \ |
| 50 | } |
| 51 | |
| 52 | static void |
| 53 | shadowRedisplay(ScreenPtr pScreen) |
| 54 | { |
| 55 | shadowBuf(pScreen); |
| 56 | RegionPtr pRegion; |
| 57 | |
| 58 | if (!pBuf || !pBuf->pDamage || !pBuf->update) |
| 59 | return; |
| 60 | pRegion = DamageRegion(pBuf->pDamage); |
| 61 | if (RegionNotEmpty(pRegion)) { |
| 62 | (*pBuf->update) (pScreen, pBuf); |
| 63 | DamageEmpty(pBuf->pDamage); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | static void |
| 68 | shadowBlockHandler(pointer data, OSTimePtr pTimeout, pointer pRead) |
| 69 | { |
| 70 | ScreenPtr pScreen = (ScreenPtr) data; |
| 71 | |
| 72 | shadowRedisplay(pScreen); |
| 73 | } |
| 74 | |
| 75 | static void |
| 76 | shadowWakeupHandler(pointer data, int i, pointer LastSelectMask) |
| 77 | { |
| 78 | } |
| 79 | |
| 80 | static void |
| 81 | shadowGetImage(DrawablePtr pDrawable, int sx, int sy, int w, int h, |
| 82 | unsigned int format, unsigned long planeMask, char *pdstLine) |
| 83 | { |
| 84 | ScreenPtr pScreen = pDrawable->pScreen; |
| 85 | |
| 86 | shadowBuf(pScreen); |
| 87 | |
| 88 | /* Many apps use GetImage to sync with the visable frame buffer */ |
| 89 | if (pDrawable->type == DRAWABLE_WINDOW) |
| 90 | shadowRedisplay(pScreen); |
| 91 | unwrap(pBuf, pScreen, GetImage); |
| 92 | pScreen->GetImage(pDrawable, sx, sy, w, h, format, planeMask, pdstLine); |
| 93 | wrap(pBuf, pScreen, GetImage); |
| 94 | } |
| 95 | |
| 96 | #define BACKWARDS_COMPATIBILITY |
| 97 | |
| 98 | static Bool |
| 99 | shadowCloseScreen(ScreenPtr pScreen) |
| 100 | { |
| 101 | shadowBuf(pScreen); |
| 102 | |
| 103 | unwrap(pBuf, pScreen, GetImage); |
| 104 | unwrap(pBuf, pScreen, CloseScreen); |
| 105 | shadowRemove(pScreen, pBuf->pPixmap); |
| 106 | DamageDestroy(pBuf->pDamage); |
| 107 | #ifdef BACKWARDS_COMPATIBILITY |
| 108 | RegionUninit(&pBuf->damage); /* bc */ |
| 109 | #endif |
| 110 | if (pBuf->pPixmap) |
| 111 | pScreen->DestroyPixmap(pBuf->pPixmap); |
| 112 | free(pBuf); |
| 113 | return pScreen->CloseScreen(pScreen); |
| 114 | } |
| 115 | |
| 116 | #ifdef BACKWARDS_COMPATIBILITY |
| 117 | static void |
| 118 | shadowReportFunc(DamagePtr pDamage, RegionPtr pRegion, void *closure) |
| 119 | { |
| 120 | ScreenPtr pScreen = closure; |
| 121 | shadowBufPtr pBuf = (shadowBufPtr) |
| 122 | dixLookupPrivate(&pScreen->devPrivates, shadowScrPrivateKey); |
| 123 | |
| 124 | /* Register the damaged region, use DamageReportNone below when we |
| 125 | * want to break BC below... */ |
| 126 | RegionUnion(&pDamage->damage, &pDamage->damage, pRegion); |
| 127 | |
| 128 | /* |
| 129 | * BC hack. In 7.0 and earlier several drivers would inspect the |
| 130 | * 'damage' member directly, so we have to keep it existing. |
| 131 | */ |
| 132 | RegionCopy(&pBuf->damage, pRegion); |
| 133 | } |
| 134 | #endif |
| 135 | |
| 136 | Bool |
| 137 | shadowSetup(ScreenPtr pScreen) |
| 138 | { |
| 139 | shadowBufPtr pBuf; |
| 140 | |
| 141 | if (!dixRegisterPrivateKey(&shadowScrPrivateKeyRec, PRIVATE_SCREEN, 0)) |
| 142 | return FALSE; |
| 143 | |
| 144 | if (!DamageSetup(pScreen)) |
| 145 | return FALSE; |
| 146 | |
| 147 | pBuf = malloc(sizeof(shadowBufRec)); |
| 148 | if (!pBuf) |
| 149 | return FALSE; |
| 150 | #ifdef BACKWARDS_COMPATIBILITY |
| 151 | pBuf->pDamage = DamageCreate((DamageReportFunc) shadowReportFunc, |
| 152 | (DamageDestroyFunc) NULL, |
| 153 | DamageReportRawRegion, TRUE, pScreen, pScreen); |
| 154 | #else |
| 155 | pBuf->pDamage = DamageCreate((DamageReportFunc) NULL, |
| 156 | (DamageDestroyFunc) NULL, |
| 157 | DamageReportNone, TRUE, pScreen, pScreen); |
| 158 | #endif |
| 159 | if (!pBuf->pDamage) { |
| 160 | free(pBuf); |
| 161 | return FALSE; |
| 162 | } |
| 163 | |
| 164 | wrap(pBuf, pScreen, CloseScreen); |
| 165 | wrap(pBuf, pScreen, GetImage); |
| 166 | pBuf->update = 0; |
| 167 | pBuf->window = 0; |
| 168 | pBuf->pPixmap = 0; |
| 169 | pBuf->closure = 0; |
| 170 | pBuf->randr = 0; |
| 171 | #ifdef BACKWARDS_COMPATIBILITY |
| 172 | RegionNull(&pBuf->damage); /* bc */ |
| 173 | #endif |
| 174 | |
| 175 | dixSetPrivate(&pScreen->devPrivates, shadowScrPrivateKey, pBuf); |
| 176 | return TRUE; |
| 177 | } |
| 178 | |
| 179 | Bool |
| 180 | shadowAdd(ScreenPtr pScreen, PixmapPtr pPixmap, ShadowUpdateProc update, |
| 181 | ShadowWindowProc window, int randr, void *closure) |
| 182 | { |
| 183 | shadowBuf(pScreen); |
| 184 | |
| 185 | if (!RegisterBlockAndWakeupHandlers(shadowBlockHandler, shadowWakeupHandler, |
| 186 | (pointer) pScreen)) |
| 187 | return FALSE; |
| 188 | |
| 189 | /* |
| 190 | * Map simple rotation values to bitmasks; fortunately, |
| 191 | * these are all unique |
| 192 | */ |
| 193 | switch (randr) { |
| 194 | case 0: |
| 195 | randr = SHADOW_ROTATE_0; |
| 196 | break; |
| 197 | case 90: |
| 198 | randr = SHADOW_ROTATE_90; |
| 199 | break; |
| 200 | case 180: |
| 201 | randr = SHADOW_ROTATE_180; |
| 202 | break; |
| 203 | case 270: |
| 204 | randr = SHADOW_ROTATE_270; |
| 205 | break; |
| 206 | } |
| 207 | pBuf->update = update; |
| 208 | pBuf->window = window; |
| 209 | pBuf->randr = randr; |
| 210 | pBuf->closure = closure; |
| 211 | pBuf->pPixmap = pPixmap; |
| 212 | DamageRegister(&pPixmap->drawable, pBuf->pDamage); |
| 213 | return TRUE; |
| 214 | } |
| 215 | |
| 216 | void |
| 217 | shadowRemove(ScreenPtr pScreen, PixmapPtr pPixmap) |
| 218 | { |
| 219 | shadowBuf(pScreen); |
| 220 | |
| 221 | if (pBuf->pPixmap) { |
| 222 | DamageUnregister(pBuf->pDamage); |
| 223 | pBuf->update = 0; |
| 224 | pBuf->window = 0; |
| 225 | pBuf->randr = 0; |
| 226 | pBuf->closure = 0; |
| 227 | pBuf->pPixmap = 0; |
| 228 | } |
| 229 | |
| 230 | RemoveBlockAndWakeupHandlers(shadowBlockHandler, shadowWakeupHandler, |
| 231 | (pointer) pScreen); |
| 232 | } |
| 233 | |
| 234 | Bool |
| 235 | shadowInit(ScreenPtr pScreen, ShadowUpdateProc update, ShadowWindowProc window) |
| 236 | { |
| 237 | PixmapPtr pPixmap; |
| 238 | |
| 239 | pPixmap = pScreen->CreatePixmap(pScreen, pScreen->width, pScreen->height, |
| 240 | pScreen->rootDepth, 0); |
| 241 | if (!pPixmap) |
| 242 | return FALSE; |
| 243 | |
| 244 | if (!shadowSetup(pScreen)) { |
| 245 | pScreen->DestroyPixmap(pPixmap); |
| 246 | return FALSE; |
| 247 | } |
| 248 | |
| 249 | shadowAdd(pScreen, pPixmap, update, window, SHADOW_ROTATE_0, 0); |
| 250 | |
| 251 | return TRUE; |
| 252 | } |