| 1 | /* |
| 2 | * Copyright © 2013 Geert Uytterhoeven |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 21 | * DEALINGS IN THE SOFTWARE. |
| 22 | * |
| 23 | * Based on shpacked.c, which is Copyright © 2000 Keith Packard |
| 24 | */ |
| 25 | |
| 26 | #ifdef HAVE_DIX_CONFIG_H |
| 27 | #include <dix-config.h> |
| 28 | #endif |
| 29 | |
| 30 | #include <stdlib.h> |
| 31 | |
| 32 | #include <X11/X.h> |
| 33 | #include "scrnintstr.h" |
| 34 | #include "windowstr.h" |
| 35 | #include <X11/fonts/font.h> |
| 36 | #include "dixfontstr.h" |
| 37 | #include <X11/fonts/fontstruct.h> |
| 38 | #include "mi.h" |
| 39 | #include "regionstr.h" |
| 40 | #include "globals.h" |
| 41 | #include "gcstruct.h" |
| 42 | #include "shadow.h" |
| 43 | #include "fb.h" |
| 44 | #include "c2p_core.h" |
| 45 | |
| 46 | |
| 47 | /* |
| 48 | * Perform a full C2P step on 16 4-bit pixels, stored in 2 32-bit words |
| 49 | * containing |
| 50 | * - 16 4-bit chunky pixels on input |
| 51 | * - permutated planar data (2 planes per 32-bit word) on output |
| 52 | */ |
| 53 | |
| 54 | static void c2p_16x4(CARD32 d[2]) |
| 55 | { |
| 56 | transp2(d, 8); |
| 57 | transp2(d, 2); |
| 58 | transp2x(d, 1); |
| 59 | transp2(d, 16); |
| 60 | transp2(d, 4); |
| 61 | transp2(d, 1); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | /* |
| 66 | * Store a full block of iplan2p4 data after c2p conversion |
| 67 | */ |
| 68 | |
| 69 | static inline void store_iplan2p4(void *dst, const CARD32 d[2]) |
| 70 | { |
| 71 | CARD32 *p = dst; |
| 72 | |
| 73 | *p++ = d[0]; |
| 74 | *p++ = d[1]; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | void |
| 79 | shadowUpdateIplan2p4(ScreenPtr pScreen, shadowBufPtr pBuf) |
| 80 | { |
| 81 | RegionPtr damage = shadowDamage(pBuf); |
| 82 | PixmapPtr pShadow = pBuf->pPixmap; |
| 83 | int nbox = RegionNumRects(damage); |
| 84 | BoxPtr pbox = RegionRects(damage); |
| 85 | FbBits *shaBase; |
| 86 | CARD16 *shaLine, *sha; |
| 87 | FbStride shaStride; |
| 88 | int scrLine; |
| 89 | _X_UNUSED int shaBpp, shaXoff, shaYoff; |
| 90 | int x, y, w, h; |
| 91 | int i, n; |
| 92 | CARD16 *win; |
| 93 | _X_UNUSED CARD32 winSize; |
| 94 | union { |
| 95 | CARD8 bytes[8]; |
| 96 | CARD32 words[2]; |
| 97 | } d; |
| 98 | |
| 99 | fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff, |
| 100 | shaYoff); |
| 101 | shaStride *= sizeof(FbBits) / sizeof(CARD16); |
| 102 | |
| 103 | while (nbox--) { |
| 104 | x = pbox->x1; |
| 105 | y = pbox->y1; |
| 106 | w = pbox->x2 - pbox->x1; |
| 107 | h = pbox->y2 - pbox->y1; |
| 108 | |
| 109 | scrLine = (x & -16) / 2; |
| 110 | shaLine = (CARD16 *)shaBase + y * shaStride + scrLine / sizeof(CARD16); |
| 111 | |
| 112 | n = ((x & 15) + w + 15) / 16; /* number of c2p units in scanline */ |
| 113 | |
| 114 | while (h--) { |
| 115 | sha = shaLine; |
| 116 | win = (CARD16 *) (*pBuf->window) (pScreen, |
| 117 | y, |
| 118 | scrLine, |
| 119 | SHADOW_WINDOW_WRITE, |
| 120 | &winSize, |
| 121 | pBuf->closure); |
| 122 | if (!win) |
| 123 | return; |
| 124 | for (i = 0; i < n; i++) { |
| 125 | memcpy(d.bytes, sha, sizeof(d.bytes)); |
| 126 | c2p_16x4(d.words); |
| 127 | store_iplan2p4(win, d.words); |
| 128 | sha += sizeof(d.bytes) / sizeof(*sha); |
| 129 | win += sizeof(d.bytes) / sizeof(*win); |
| 130 | } |
| 131 | shaLine += shaStride; |
| 132 | y++; |
| 133 | } |
| 134 | pbox++; |
| 135 | } |
| 136 | } |