| 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 "fb.h" |
| 28 | |
| 29 | /* |
| 30 | * Accelerated tile fill -- tile width is a power of two not greater |
| 31 | * than FB_UNIT |
| 32 | */ |
| 33 | |
| 34 | void |
| 35 | fbEvenTile(FbBits * dst, |
| 36 | FbStride dstStride, |
| 37 | int dstX, |
| 38 | int width, |
| 39 | int height, |
| 40 | FbBits * tile, |
| 41 | FbStride tileStride, |
| 42 | int tileHeight, int alu, FbBits pm, int xRot, int yRot) |
| 43 | { |
| 44 | FbBits *t, *tileEnd, bits; |
| 45 | FbBits startmask, endmask; |
| 46 | FbBits and, xor; |
| 47 | int n, nmiddle; |
| 48 | int tileX, tileY; |
| 49 | int rot; |
| 50 | int startbyte, endbyte; |
| 51 | |
| 52 | dst += dstX >> FB_SHIFT; |
| 53 | dstX &= FB_MASK; |
| 54 | FbMaskBitsBytes(dstX, width, FbDestInvarientRop(alu, pm), |
| 55 | startmask, startbyte, nmiddle, endmask, endbyte); |
| 56 | if (startmask) |
| 57 | dstStride--; |
| 58 | dstStride -= nmiddle; |
| 59 | |
| 60 | /* |
| 61 | * Compute tile start scanline and rotation parameters |
| 62 | */ |
| 63 | tileEnd = tile + tileHeight * tileStride; |
| 64 | modulus(-yRot, tileHeight, tileY); |
| 65 | t = tile + tileY * tileStride; |
| 66 | modulus(-xRot, FB_UNIT, tileX); |
| 67 | rot = tileX; |
| 68 | |
| 69 | while (height--) { |
| 70 | |
| 71 | /* |
| 72 | * Pick up bits for this scanline |
| 73 | */ |
| 74 | bits = READ(t); |
| 75 | t += tileStride; |
| 76 | if (t >= tileEnd) |
| 77 | t = tile; |
| 78 | bits = FbRotLeft(bits, rot); |
| 79 | and = fbAnd(alu, bits, pm); |
| 80 | xor = fbXor(alu, bits, pm); |
| 81 | |
| 82 | if (startmask) { |
| 83 | FbDoLeftMaskByteRRop(dst, startbyte, startmask, and, xor); |
| 84 | dst++; |
| 85 | } |
| 86 | n = nmiddle; |
| 87 | if (!and) |
| 88 | while (n--) |
| 89 | WRITE(dst++, xor); |
| 90 | else |
| 91 | while (n--) { |
| 92 | WRITE(dst, FbDoRRop(READ(dst), and, xor)); |
| 93 | dst++; |
| 94 | } |
| 95 | if (endmask) |
| 96 | FbDoRightMaskByteRRop(dst, endbyte, endmask, and, xor); |
| 97 | dst += dstStride; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | void |
| 102 | fbOddTile(FbBits * dst, |
| 103 | FbStride dstStride, |
| 104 | int dstX, |
| 105 | int width, |
| 106 | int height, |
| 107 | FbBits * tile, |
| 108 | FbStride tileStride, |
| 109 | int tileWidth, |
| 110 | int tileHeight, int alu, FbBits pm, int bpp, int xRot, int yRot) |
| 111 | { |
| 112 | int tileX, tileY; |
| 113 | int widthTmp; |
| 114 | int h, w; |
| 115 | int x, y; |
| 116 | |
| 117 | modulus(-yRot, tileHeight, tileY); |
| 118 | y = 0; |
| 119 | while (height) { |
| 120 | h = tileHeight - tileY; |
| 121 | if (h > height) |
| 122 | h = height; |
| 123 | height -= h; |
| 124 | widthTmp = width; |
| 125 | x = dstX; |
| 126 | modulus(dstX - xRot, tileWidth, tileX); |
| 127 | while (widthTmp) { |
| 128 | w = tileWidth - tileX; |
| 129 | if (w > widthTmp) |
| 130 | w = widthTmp; |
| 131 | widthTmp -= w; |
| 132 | fbBlt(tile + tileY * tileStride, |
| 133 | tileStride, |
| 134 | tileX, |
| 135 | dst + y * dstStride, |
| 136 | dstStride, x, w, h, alu, pm, bpp, FALSE, FALSE); |
| 137 | x += w; |
| 138 | tileX = 0; |
| 139 | } |
| 140 | y += h; |
| 141 | tileY = 0; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | void |
| 146 | fbTile(FbBits * dst, |
| 147 | FbStride dstStride, |
| 148 | int dstX, |
| 149 | int width, |
| 150 | int height, |
| 151 | FbBits * tile, |
| 152 | FbStride tileStride, |
| 153 | int tileWidth, |
| 154 | int tileHeight, int alu, FbBits pm, int bpp, int xRot, int yRot) |
| 155 | { |
| 156 | if (FbEvenTile(tileWidth)) |
| 157 | fbEvenTile(dst, dstStride, dstX, width, height, |
| 158 | tile, tileStride, tileHeight, alu, pm, xRot, yRot); |
| 159 | else |
| 160 | fbOddTile(dst, dstStride, dstX, width, height, |
| 161 | tile, tileStride, tileWidth, tileHeight, |
| 162 | alu, pm, bpp, xRot, yRot); |
| 163 | } |