| 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 | } |