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Diffstat (limited to 'xorg-server/fb/fbbltone.c')
-rw-r--r--xorg-server/fb/fbbltone.c1724
1 files changed, 862 insertions, 862 deletions
diff --git a/xorg-server/fb/fbbltone.c b/xorg-server/fb/fbbltone.c
index e429b1b35..67e7853c6 100644
--- a/xorg-server/fb/fbbltone.c
+++ b/xorg-server/fb/fbbltone.c
@@ -1,862 +1,862 @@
-/*
- * Copyright © 1998 Keith Packard
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation, and that the name of Keith Packard not be used in
- * advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission. Keith Packard makes no
- * representations about the suitability of this software for any purpose. It
- * is provided "as is" without express or implied warranty.
- *
- * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
- * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include "fb.h"
-
-#ifdef __clang__
-/* shift overflow is intentional */
-#pragma clang diagnostic ignored "-Wshift-overflow"
-#endif
-
-/*
- * Example: srcX = 13 dstX = 8 (FB unit 32 dstBpp 8)
- *
- * **** **** **** **** **** **** **** ****
- * ^
- * ******** ******** ******** ********
- * ^
- * leftShift = 12
- * rightShift = 20
- *
- * Example: srcX = 0 dstX = 8 (FB unit 32 dstBpp 8)
- *
- * **** **** **** **** **** **** **** ****
- * ^
- * ******** ******** ******** ********
- * ^
- *
- * leftShift = 24
- * rightShift = 8
- */
-
-#define LoadBits {\
- if (leftShift) { \
- bitsRight = (src < srcEnd ? READ(src++) : 0); \
- bits = (FbStipLeft (bitsLeft, leftShift) | \
- FbStipRight(bitsRight, rightShift)); \
- bitsLeft = bitsRight; \
- } else \
- bits = (src < srcEnd ? READ(src++) : 0); \
-}
-
-
-#define LaneCases1(n,a) case n: FbLaneCase(n,a); break
-#define LaneCases2(n,a) LaneCases1(n,a); LaneCases1(n+1,a)
-#define LaneCases4(n,a) LaneCases2(n,a); LaneCases2(n+2,a)
-#define LaneCases8(n,a) LaneCases4(n,a); LaneCases4(n+4,a)
-#define LaneCases16(n,a) LaneCases8(n,a); LaneCases8(n+8,a)
-#define LaneCases32(n,a) LaneCases16(n,a); LaneCases16(n+16,a)
-#define LaneCases64(n,a) LaneCases32(n,a); LaneCases32(n+32,a)
-#define LaneCases128(n,a) LaneCases64(n,a); LaneCases64(n+64,a)
-#define LaneCases256(n,a) LaneCases128(n,a); LaneCases128(n+128,a)
-
-#if FB_SHIFT == 6
-#define LaneCases(a) LaneCases256(0,a)
-#endif
-
-#if FB_SHIFT == 5
-#define LaneCases(a) LaneCases16(0,a)
-#endif
-
-#if FB_SHIFT == 6
-CARD8 fb8Lane[256] = {
-0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
-22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
-41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
-60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78,
-79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97,
-98, 99, 100, 101, 102,103,104,105,106,107,108,109,110,111,112,113,114,115,
-116, 117, 118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,
-134, 135, 136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,
-152, 153, 154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,
-170, 171, 172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,
-188, 189, 190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,
-206, 207, 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
-224, 225, 226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,
-242, 243, 244,245,246,247,248,249,250,251,252,253,254,255,
-};
-
-CARD8 fb16Lane[256] = {
- 0x00, 0x03, 0x0c, 0x0f,
- 0x30, 0x33, 0x3c, 0x3f,
- 0xc0, 0xc3, 0xcc, 0xcf,
- 0xf0, 0xf3, 0xfc, 0xff,
-};
-
-CARD8 fb32Lane[16] = {
- 0x00, 0x0f, 0xf0, 0xff,
-};
-#endif
-
-#if FB_SHIFT == 5
-CARD8 fb8Lane[16] = {
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
-};
-
-CARD8 fb16Lane[16] = {
- 0, 3, 12, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-};
-
-CARD8 fb32Lane[16] = {
- 0, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-};
-#endif
-
-CARD8 *fbLaneTable[33] = {
- 0, 0, 0, 0, 0, 0, 0, 0,
- fb8Lane, 0, 0, 0, 0, 0, 0, 0,
- fb16Lane, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- fb32Lane
-};
-
-void
-fbBltOne (FbStip *src,
- FbStride srcStride, /* FbStip units per scanline */
- int srcX, /* bit position of source */
- FbBits *dst,
- FbStride dstStride, /* FbBits units per scanline */
- int dstX, /* bit position of dest */
- int dstBpp, /* bits per destination unit */
-
- int width, /* width in bits of destination */
- int height, /* height in scanlines */
-
- FbBits fgand, /* rrop values */
- FbBits fgxor,
- FbBits bgand,
- FbBits bgxor)
-{
- const FbBits *fbBits;
- FbBits *srcEnd;
- int pixelsPerDst; /* dst pixels per FbBits */
- int unitsPerSrc; /* src patterns per FbStip */
- int leftShift, rightShift; /* align source with dest */
- FbBits startmask, endmask; /* dest scanline masks */
- FbStip bits=0, bitsLeft, bitsRight;/* source bits */
- FbStip left;
- FbBits mask;
- int nDst; /* dest longwords (w.o. end) */
- int w;
- int n, nmiddle;
- int dstS; /* stipple-relative dst X coordinate */
- Bool copy; /* accelerate dest-invariant */
- Bool transparent; /* accelerate 0 nop */
- int srcinc; /* source units consumed */
- Bool endNeedsLoad = FALSE; /* need load for endmask */
- CARD8 *fbLane;
- int startbyte, endbyte;
-
- if (dstBpp == 24)
- {
- fbBltOne24 (src, srcStride, srcX,
- dst, dstStride, dstX, dstBpp,
- width, height,
- fgand, fgxor, bgand, bgxor);
- return;
- }
-
- /*
- * Do not read past the end of the buffer!
- */
- srcEnd = src + height * srcStride;
-
- /*
- * Number of destination units in FbBits == number of stipple pixels
- * used each time
- */
- pixelsPerDst = FB_UNIT / dstBpp;
-
- /*
- * Number of source stipple patterns in FbStip
- */
- unitsPerSrc = FB_STIP_UNIT / pixelsPerDst;
-
- copy = FALSE;
- transparent = FALSE;
- if (bgand == 0 && fgand == 0)
- copy = TRUE;
- else if (bgand == FB_ALLONES && bgxor == 0)
- transparent = TRUE;
-
- /*
- * Adjust source and dest to nearest FbBits boundary
- */
- src += srcX >> FB_STIP_SHIFT;
- dst += dstX >> FB_SHIFT;
- srcX &= FB_STIP_MASK;
- dstX &= FB_MASK;
-
- FbMaskBitsBytes(dstX, width, copy,
- startmask, startbyte, nmiddle, endmask, endbyte);
-
- /*
- * Compute effective dest alignment requirement for
- * source -- must align source to dest unit boundary
- */
- dstS = dstX / dstBpp;
- /*
- * Compute shift constants for effective alignement
- */
- if (srcX >= dstS)
- {
- leftShift = srcX - dstS;
- rightShift = FB_STIP_UNIT - leftShift;
- }
- else
- {
- rightShift = dstS - srcX;
- leftShift = FB_STIP_UNIT - rightShift;
- }
- /*
- * Get pointer to stipple mask array for this depth
- */
- fbBits = 0; /* unused */
- if (pixelsPerDst <= 8)
- fbBits = fbStippleTable[pixelsPerDst];
- fbLane = 0;
- if (transparent && fgand == 0 && dstBpp >= 8)
- fbLane = fbLaneTable[dstBpp];
-
- /*
- * Compute total number of destination words written, but
- * don't count endmask
- */
- nDst = nmiddle;
- if (startmask)
- nDst++;
-
- dstStride -= nDst;
-
- /*
- * Compute total number of source words consumed
- */
-
- srcinc = (nDst + unitsPerSrc - 1) / unitsPerSrc;
-
- if (srcX > dstS)
- srcinc++;
- if (endmask)
- {
- endNeedsLoad = nDst % unitsPerSrc == 0;
- if (endNeedsLoad)
- srcinc++;
- }
-
- srcStride -= srcinc;
-
- /*
- * Copy rectangle
- */
- while (height--)
- {
- w = nDst; /* total units across scanline */
- n = unitsPerSrc; /* units avail in single stipple */
- if (n > w)
- n = w;
-
- bitsLeft = 0;
- if (srcX > dstS)
- bitsLeft = READ(src++);
- if (n)
- {
- /*
- * Load first set of stipple bits
- */
- LoadBits;
-
- /*
- * Consume stipple bits for startmask
- */
- if (startmask)
- {
-#if FB_UNIT > 32
- if (pixelsPerDst == 16)
- mask = FbStipple16Bits(FbLeftStipBits(bits,16));
- else
-#endif
- mask = fbBits[FbLeftStipBits(bits,pixelsPerDst)];
- if (fbLane)
- {
- fbTransparentSpan (dst, mask & startmask, fgxor, 1);
- }
- else
- {
- if (mask || !transparent)
- FbDoLeftMaskByteStippleRRop (dst, mask,
- fgand, fgxor, bgand, bgxor,
- startbyte, startmask);
- }
- bits = FbStipLeft (bits, pixelsPerDst);
- dst++;
- n--;
- w--;
- }
- /*
- * Consume stipple bits across scanline
- */
- for (;;)
- {
- w -= n;
- if (copy)
- {
- while (n--)
- {
-#if FB_UNIT > 32
- if (pixelsPerDst == 16)
- mask = FbStipple16Bits(FbLeftStipBits(bits,16));
- else
-#endif
- mask = fbBits[FbLeftStipBits(bits,pixelsPerDst)];
- WRITE(dst, FbOpaqueStipple (mask, fgxor, bgxor));
- dst++;
- bits = FbStipLeft(bits, pixelsPerDst);
- }
- }
- else
- {
- if (fbLane)
- {
- while (bits && n)
- {
- switch (fbLane[FbLeftStipBits(bits,pixelsPerDst)]) {
- LaneCases((CARD8 *) dst);
- }
- bits = FbStipLeft(bits,pixelsPerDst);
- dst++;
- n--;
- }
- dst += n;
- }
- else
- {
- while (n--)
- {
- left = FbLeftStipBits(bits,pixelsPerDst);
- if (left || !transparent)
- {
- mask = fbBits[left];
- WRITE(dst, FbStippleRRop (READ(dst), mask,
- fgand, fgxor, bgand, bgxor));
- }
- dst++;
- bits = FbStipLeft(bits, pixelsPerDst);
- }
- }
- }
- if (!w)
- break;
- /*
- * Load another set and reset number of available units
- */
- LoadBits;
- n = unitsPerSrc;
- if (n > w)
- n = w;
- }
- }
- /*
- * Consume stipple bits for endmask
- */
- if (endmask)
- {
- if (endNeedsLoad)
- {
- LoadBits;
- }
-#if FB_UNIT > 32
- if (pixelsPerDst == 16)
- mask = FbStipple16Bits(FbLeftStipBits(bits,16));
- else
-#endif
- mask = fbBits[FbLeftStipBits(bits,pixelsPerDst)];
- if (fbLane)
- {
- fbTransparentSpan (dst, mask & endmask, fgxor, 1);
- }
- else
- {
- if (mask || !transparent)
- FbDoRightMaskByteStippleRRop (dst, mask,
- fgand, fgxor, bgand, bgxor,
- endbyte, endmask);
- }
- }
- dst += dstStride;
- src += srcStride;
- }
-}
-
-
-/*
- * Crufty macros to initialize the mask array, most of this
- * is to avoid compile-time warnings about shift overflow
- */
-
-#if BITMAP_BIT_ORDER == MSBFirst
-#define Mask24Pos(x,r) ((x)*24-(r))
-#else
-#define Mask24Pos(x,r) ((x)*24-((r) ? 24 - (r) : 0))
-#endif
-
-#define Mask24Neg(x,r) (Mask24Pos(x,r) < 0 ? -Mask24Pos(x,r) : 0)
-#define Mask24Check(x,r) (Mask24Pos(x,r) < 0 ? 0 : \
- Mask24Pos(x,r) >= FB_UNIT ? 0 : Mask24Pos(x,r))
-
-#define Mask24(x,r) (Mask24Pos(x,r) < FB_UNIT ? \
- (Mask24Pos(x,r) < 0 ? \
- 0xffffffU >> Mask24Neg (x,r) : \
- 0xffffffU << Mask24Check(x,r)) : 0)
-
-#define SelMask24(b,n,r) ((((b) >> n) & 1) * Mask24(n,r))
-
-/*
- * Untested for MSBFirst or FB_UNIT == 32
- */
-
-#if FB_UNIT == 64
-#define C4_24(b,r) \
- (SelMask24(b,0,r) | \
- SelMask24(b,1,r) | \
- SelMask24(b,2,r) | \
- SelMask24(b,3,r))
-
-#define FbStip24New(rot) (2 + (rot != 0))
-#define FbStip24Len 4
-
-const FbBits fbStipple24Bits[3][1 << FbStip24Len] = {
- /* rotate 0 */
- {
- C4_24( 0, 0), C4_24( 1, 0), C4_24( 2, 0), C4_24( 3, 0),
- C4_24( 4, 0), C4_24( 5, 0), C4_24( 6, 0), C4_24( 7, 0),
- C4_24( 8, 0), C4_24( 9, 0), C4_24(10, 0), C4_24(11, 0),
- C4_24(12, 0), C4_24(13, 0), C4_24(14, 0), C4_24(15, 0),
- },
- /* rotate 8 */
- {
- C4_24( 0, 8), C4_24( 1, 8), C4_24( 2, 8), C4_24( 3, 8),
- C4_24( 4, 8), C4_24( 5, 8), C4_24( 6, 8), C4_24( 7, 8),
- C4_24( 8, 8), C4_24( 9, 8), C4_24(10, 8), C4_24(11, 8),
- C4_24(12, 8), C4_24(13, 8), C4_24(14, 8), C4_24(15, 8),
- },
- /* rotate 16 */
- {
- C4_24( 0,16), C4_24( 1,16), C4_24( 2,16), C4_24( 3,16),
- C4_24( 4,16), C4_24( 5,16), C4_24( 6,16), C4_24( 7,16),
- C4_24( 8,16), C4_24( 9,16), C4_24(10,16), C4_24(11,16),
- C4_24(12,16), C4_24(13,16), C4_24(14,16), C4_24(15,16),
- }
-};
-
-#endif
-
-#if FB_UNIT == 32
-#define C2_24(b,r) \
- (SelMask24(b,0,r) | \
- SelMask24(b,1,r))
-
-#define FbStip24Len 2
-#if BITMAP_BIT_ORDER == MSBFirst
-#define FbStip24New(rot) (1 + (rot == 0))
-#else
-#define FbStip24New(rot) (1 + (rot == 8))
-#endif
-
-const FbBits fbStipple24Bits[3][1 << FbStip24Len] = {
- /* rotate 0 */
- {
- C2_24( 0, 0), C2_24 ( 1, 0), C2_24 ( 2, 0), C2_24 ( 3, 0),
- },
- /* rotate 8 */
- {
- C2_24( 0, 8), C2_24 ( 1, 8), C2_24 ( 2, 8), C2_24 ( 3, 8),
- },
- /* rotate 16 */
- {
- C2_24( 0,16), C2_24 ( 1,16), C2_24 ( 2,16), C2_24 ( 3,16),
- }
-};
-#endif
-
-#if BITMAP_BIT_ORDER == LSBFirst
-
-#define FbMergeStip24Bits(left, right, new) \
- (FbStipLeft (left, new) | FbStipRight ((right), (FbStip24Len - (new))))
-
-#define FbMergePartStip24Bits(left, right, llen, rlen) \
- (left | FbStipRight(right, llen))
-
-#else
-
-#define FbMergeStip24Bits(left, right, new) \
- ((FbStipLeft (left, new) & ((1 << FbStip24Len) - 1)) | right)
-
-#define FbMergePartStip24Bits(left, right, llen, rlen) \
- (FbStipLeft(left, rlen) | right)
-
-#endif
-
-#define fbFirstStipBits(len,stip) {\
- int __len = (len); \
- if (len <= remain) { \
- stip = FbLeftStipBits(bits, len); \
- } else { \
- stip = FbLeftStipBits(bits, remain); \
- bits = (src < srcEnd ? READ(src++) : 0); \
- __len = (len) - remain; \
- stip = FbMergePartStip24Bits(stip, FbLeftStipBits(bits, __len), \
- remain, __len); \
- remain = FB_STIP_UNIT; \
- } \
- bits = FbStipLeft (bits, __len); \
- remain -= __len; \
-}
-
-#define fbInitStipBits(offset,len,stip) {\
- bits = FbStipLeft (READ(src++),offset); \
- remain = FB_STIP_UNIT - offset; \
- fbFirstStipBits(len,stip); \
- stip = FbMergeStip24Bits (0, stip, len); \
-}
-
-#define fbNextStipBits(rot,stip) {\
- int __new = FbStip24New(rot); \
- FbStip __right; \
- fbFirstStipBits(__new, __right); \
- stip = FbMergeStip24Bits (stip, __right, __new); \
- rot = FbNext24Rot (rot); \
-}
-
-/*
- * Use deep mask tables that incorporate rotation, pull
- * a variable number of bits out of the stipple and
- * reuse the right bits as needed for the next write
- *
- * Yes, this is probably too much code, but most 24-bpp screens
- * have no acceleration so this code is used for stipples, copyplane
- * and text
- */
-void
-fbBltOne24 (FbStip *srcLine,
- FbStride srcStride, /* FbStip units per scanline */
- int srcX, /* bit position of source */
- FbBits *dst,
- FbStride dstStride, /* FbBits units per scanline */
- int dstX, /* bit position of dest */
- int dstBpp, /* bits per destination unit */
-
- int width, /* width in bits of destination */
- int height, /* height in scanlines */
-
- FbBits fgand, /* rrop values */
- FbBits fgxor,
- FbBits bgand,
- FbBits bgxor)
-{
- FbStip *src, *srcEnd;
- FbBits leftMask, rightMask, mask;
- int nlMiddle, nl;
- FbStip stip, bits;
- int remain;
- int dstS;
- int firstlen;
- int rot0, rot;
- int nDst;
-
- /*
- * Do not read past the end of the buffer!
- */
- srcEnd = srcLine + height * srcStride;
-
- srcLine += srcX >> FB_STIP_SHIFT;
- dst += dstX >> FB_SHIFT;
- srcX &= FB_STIP_MASK;
- dstX &= FB_MASK;
- rot0 = FbFirst24Rot (dstX);
-
- FbMaskBits (dstX, width, leftMask, nlMiddle, rightMask);
-
- dstS = (dstX + 23) / 24;
- firstlen = FbStip24Len - dstS;
-
- nDst = nlMiddle;
- if (leftMask)
- nDst++;
- dstStride -= nDst;
-
- /* opaque copy */
- if (bgand == 0 && fgand == 0)
- {
- while (height--)
- {
- rot = rot0;
- src = srcLine;
- srcLine += srcStride;
- fbInitStipBits (srcX,firstlen, stip);
- if (leftMask)
- {
- mask = fbStipple24Bits[rot >> 3][stip];
- WRITE(dst, (READ(dst) & ~leftMask) |
- (FbOpaqueStipple (mask,
- FbRot24(fgxor, rot),
- FbRot24(bgxor, rot))
- & leftMask));
- dst++;
- fbNextStipBits(rot,stip);
- }
- nl = nlMiddle;
- while (nl--)
- {
- mask = fbStipple24Bits[rot>>3][stip];
- WRITE(dst, FbOpaqueStipple (mask,
- FbRot24(fgxor, rot),
- FbRot24(bgxor, rot)));
- dst++;
- fbNextStipBits(rot,stip);
- }
- if (rightMask)
- {
- mask = fbStipple24Bits[rot >> 3][stip];
- WRITE(dst, (READ(dst) & ~rightMask) |
- (FbOpaqueStipple (mask,
- FbRot24(fgxor, rot),
- FbRot24(bgxor, rot))
- & rightMask));
- }
- dst += dstStride;
- src += srcStride;
- }
- }
- /* transparent copy */
- else if (bgand == FB_ALLONES && bgxor == 0 && fgand == 0)
- {
- while (height--)
- {
- rot = rot0;
- src = srcLine;
- srcLine += srcStride;
- fbInitStipBits (srcX, firstlen, stip);
- if (leftMask)
- {
- if (stip)
- {
- mask = fbStipple24Bits[rot >> 3][stip] & leftMask;
- WRITE(dst, (READ(dst) & ~mask) | (FbRot24(fgxor, rot) & mask));
- }
- dst++;
- fbNextStipBits (rot, stip);
- }
- nl = nlMiddle;
- while (nl--)
- {
- if (stip)
- {
- mask = fbStipple24Bits[rot>>3][stip];
- WRITE(dst, (READ(dst) & ~mask) | (FbRot24(fgxor,rot) & mask));
- }
- dst++;
- fbNextStipBits (rot, stip);
- }
- if (rightMask)
- {
- if (stip)
- {
- mask = fbStipple24Bits[rot >> 3][stip] & rightMask;
- WRITE(dst, (READ(dst) & ~mask) | (FbRot24(fgxor, rot) & mask));
- }
- }
- dst += dstStride;
- }
- }
- else
- {
- while (height--)
- {
- rot = rot0;
- src = srcLine;
- srcLine += srcStride;
- fbInitStipBits (srcX, firstlen, stip);
- if (leftMask)
- {
- mask = fbStipple24Bits[rot >> 3][stip];
- WRITE(dst, FbStippleRRopMask (READ(dst), mask,
- FbRot24(fgand, rot),
- FbRot24(fgxor, rot),
- FbRot24(bgand, rot),
- FbRot24(bgxor, rot),
- leftMask));
- dst++;
- fbNextStipBits(rot,stip);
- }
- nl = nlMiddle;
- while (nl--)
- {
- mask = fbStipple24Bits[rot >> 3][stip];
- WRITE(dst, FbStippleRRop (READ(dst), mask,
- FbRot24(fgand, rot),
- FbRot24(fgxor, rot),
- FbRot24(bgand, rot),
- FbRot24(bgxor, rot)));
- dst++;
- fbNextStipBits(rot,stip);
- }
- if (rightMask)
- {
- mask = fbStipple24Bits[rot >> 3][stip];
- WRITE(dst, FbStippleRRopMask (READ(dst), mask,
- FbRot24(fgand, rot),
- FbRot24(fgxor, rot),
- FbRot24(bgand, rot),
- FbRot24(bgxor, rot),
- rightMask));
- }
- dst += dstStride;
- }
- }
-}
-
-/*
- * Not very efficient, but simple -- copy a single plane
- * from an N bit image to a 1 bit image
- */
-
-void
-fbBltPlane (FbBits *src,
- FbStride srcStride,
- int srcX,
- int srcBpp,
-
- FbStip *dst,
- FbStride dstStride,
- int dstX,
-
- int width,
- int height,
-
- FbStip fgand,
- FbStip fgxor,
- FbStip bgand,
- FbStip bgxor,
- Pixel planeMask)
-{
- FbBits *s;
- FbBits pm;
- FbBits srcMask;
- FbBits srcMaskFirst;
- FbBits srcMask0 = 0;
- FbBits srcBits;
-
- FbStip dstBits;
- FbStip *d;
- FbStip dstMask;
- FbStip dstMaskFirst;
- FbStip dstUnion;
- int w;
- int wt;
- int rot0;
-
- if (!width)
- return;
-
- src += srcX >> FB_SHIFT;
- srcX &= FB_MASK;
-
- dst += dstX >> FB_STIP_SHIFT;
- dstX &= FB_STIP_MASK;
-
- w = width / srcBpp;
-
- pm = fbReplicatePixel (planeMask, srcBpp);
- if (srcBpp == 24)
- {
- int w = 24;
-
- rot0 = FbFirst24Rot (srcX);
- if (srcX + w > FB_UNIT)
- w = FB_UNIT - srcX;
- srcMaskFirst = FbRot24(pm,rot0) & FbBitsMask(srcX,w);
- }
- else
- {
- rot0 = 0;
- srcMaskFirst = pm & FbBitsMask(srcX, srcBpp);
- srcMask0 = pm & FbBitsMask(0, srcBpp);
- }
-
- dstMaskFirst = FbStipMask(dstX,1);
- while (height--)
- {
- d = dst;
- dst += dstStride;
- s = src;
- src += srcStride;
-
- srcMask = srcMaskFirst;
- if (srcBpp == 24)
- srcMask0 = FbRot24(pm,rot0) & FbBitsMask(0, srcBpp);
- srcBits = READ(s++);
-
- dstMask = dstMaskFirst;
- dstUnion = 0;
- dstBits = 0;
-
- wt = w;
-
- while (wt--)
- {
- if (!srcMask)
- {
- srcBits = READ(s++);
- if (srcBpp == 24)
- srcMask0 = FbNext24Pix(srcMask0) & FbBitsMask(0,24);
- srcMask = srcMask0;
- }
- if (!dstMask)
- {
- WRITE(d, FbStippleRRopMask(READ(d), dstBits,
- fgand, fgxor, bgand, bgxor,
- dstUnion));
- d++;
- dstMask = FbStipMask(0,1);
- dstUnion = 0;
- dstBits = 0;
- }
- if (srcBits & srcMask)
- dstBits |= dstMask;
- dstUnion |= dstMask;
- if (srcBpp == FB_UNIT)
- srcMask = 0;
- else
- srcMask = FbScrRight(srcMask,srcBpp);
- dstMask = FbStipRight(dstMask,1);
- }
- if (dstUnion)
- WRITE(d, FbStippleRRopMask(READ(d),dstBits,
- fgand, fgxor, bgand, bgxor,
- dstUnion));
- }
-}
-
+/*
+ * Copyright © 1998 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "fb.h"
+
+#ifdef __clang__
+/* shift overflow is intentional */
+#pragma clang diagnostic ignored "-Wshift-overflow"
+#endif
+
+/*
+ * Example: srcX = 13 dstX = 8 (FB unit 32 dstBpp 8)
+ *
+ * **** **** **** **** **** **** **** ****
+ * ^
+ * ******** ******** ******** ********
+ * ^
+ * leftShift = 12
+ * rightShift = 20
+ *
+ * Example: srcX = 0 dstX = 8 (FB unit 32 dstBpp 8)
+ *
+ * **** **** **** **** **** **** **** ****
+ * ^
+ * ******** ******** ******** ********
+ * ^
+ *
+ * leftShift = 24
+ * rightShift = 8
+ */
+
+#define LoadBits {\
+ if (leftShift) { \
+ bitsRight = (src < srcEnd ? READ(src++) : 0); \
+ bits = (FbStipLeft (bitsLeft, leftShift) | \
+ FbStipRight(bitsRight, rightShift)); \
+ bitsLeft = bitsRight; \
+ } else \
+ bits = (src < srcEnd ? READ(src++) : 0); \
+}
+
+
+#define LaneCases1(n,a) case n: FbLaneCase(n,a); break
+#define LaneCases2(n,a) LaneCases1(n,a); LaneCases1(n+1,a)
+#define LaneCases4(n,a) LaneCases2(n,a); LaneCases2(n+2,a)
+#define LaneCases8(n,a) LaneCases4(n,a); LaneCases4(n+4,a)
+#define LaneCases16(n,a) LaneCases8(n,a); LaneCases8(n+8,a)
+#define LaneCases32(n,a) LaneCases16(n,a); LaneCases16(n+16,a)
+#define LaneCases64(n,a) LaneCases32(n,a); LaneCases32(n+32,a)
+#define LaneCases128(n,a) LaneCases64(n,a); LaneCases64(n+64,a)
+#define LaneCases256(n,a) LaneCases128(n,a); LaneCases128(n+128,a)
+
+#if FB_SHIFT == 6
+#define LaneCases(a) LaneCases256(0,a)
+#endif
+
+#if FB_SHIFT == 5
+#define LaneCases(a) LaneCases16(0,a)
+#endif
+
+#if FB_SHIFT == 6
+CARD8 fb8Lane[256] = {
+0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
+22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
+60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78,
+79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97,
+98, 99, 100, 101, 102,103,104,105,106,107,108,109,110,111,112,113,114,115,
+116, 117, 118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,
+134, 135, 136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,
+152, 153, 154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,
+170, 171, 172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,
+188, 189, 190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,
+206, 207, 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
+224, 225, 226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,
+242, 243, 244,245,246,247,248,249,250,251,252,253,254,255,
+};
+
+CARD8 fb16Lane[256] = {
+ 0x00, 0x03, 0x0c, 0x0f,
+ 0x30, 0x33, 0x3c, 0x3f,
+ 0xc0, 0xc3, 0xcc, 0xcf,
+ 0xf0, 0xf3, 0xfc, 0xff,
+};
+
+CARD8 fb32Lane[16] = {
+ 0x00, 0x0f, 0xf0, 0xff,
+};
+#endif
+
+#if FB_SHIFT == 5
+CARD8 fb8Lane[16] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
+};
+
+CARD8 fb16Lane[16] = {
+ 0, 3, 12, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+CARD8 fb32Lane[16] = {
+ 0, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+#endif
+
+CARD8 *fbLaneTable[33] = {
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ fb8Lane, 0, 0, 0, 0, 0, 0, 0,
+ fb16Lane, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ fb32Lane
+};
+
+void
+fbBltOne (FbStip *src,
+ FbStride srcStride, /* FbStip units per scanline */
+ int srcX, /* bit position of source */
+ FbBits *dst,
+ FbStride dstStride, /* FbBits units per scanline */
+ int dstX, /* bit position of dest */
+ int dstBpp, /* bits per destination unit */
+
+ int width, /* width in bits of destination */
+ int height, /* height in scanlines */
+
+ FbBits fgand, /* rrop values */
+ FbBits fgxor,
+ FbBits bgand,
+ FbBits bgxor)
+{
+ const FbBits *fbBits;
+ FbBits *srcEnd;
+ int pixelsPerDst; /* dst pixels per FbBits */
+ int unitsPerSrc; /* src patterns per FbStip */
+ int leftShift, rightShift; /* align source with dest */
+ FbBits startmask, endmask; /* dest scanline masks */
+ FbStip bits=0, bitsLeft, bitsRight;/* source bits */
+ FbStip left;
+ FbBits mask;
+ int nDst; /* dest longwords (w.o. end) */
+ int w;
+ int n, nmiddle;
+ int dstS; /* stipple-relative dst X coordinate */
+ Bool copy; /* accelerate dest-invariant */
+ Bool transparent; /* accelerate 0 nop */
+ int srcinc; /* source units consumed */
+ Bool endNeedsLoad = FALSE; /* need load for endmask */
+ CARD8 *fbLane;
+ int startbyte, endbyte;
+
+ if (dstBpp == 24)
+ {
+ fbBltOne24 (src, srcStride, srcX,
+ dst, dstStride, dstX, dstBpp,
+ width, height,
+ fgand, fgxor, bgand, bgxor);
+ return;
+ }
+
+ /*
+ * Do not read past the end of the buffer!
+ */
+ srcEnd = src + height * srcStride;
+
+ /*
+ * Number of destination units in FbBits == number of stipple pixels
+ * used each time
+ */
+ pixelsPerDst = FB_UNIT / dstBpp;
+
+ /*
+ * Number of source stipple patterns in FbStip
+ */
+ unitsPerSrc = FB_STIP_UNIT / pixelsPerDst;
+
+ copy = FALSE;
+ transparent = FALSE;
+ if (bgand == 0 && fgand == 0)
+ copy = TRUE;
+ else if (bgand == FB_ALLONES && bgxor == 0)
+ transparent = TRUE;
+
+ /*
+ * Adjust source and dest to nearest FbBits boundary
+ */
+ src += srcX >> FB_STIP_SHIFT;
+ dst += dstX >> FB_SHIFT;
+ srcX &= FB_STIP_MASK;
+ dstX &= FB_MASK;
+
+ FbMaskBitsBytes(dstX, width, copy,
+ startmask, startbyte, nmiddle, endmask, endbyte);
+
+ /*
+ * Compute effective dest alignment requirement for
+ * source -- must align source to dest unit boundary
+ */
+ dstS = dstX / dstBpp;
+ /*
+ * Compute shift constants for effective alignement
+ */
+ if (srcX >= dstS)
+ {
+ leftShift = srcX - dstS;
+ rightShift = FB_STIP_UNIT - leftShift;
+ }
+ else
+ {
+ rightShift = dstS - srcX;
+ leftShift = FB_STIP_UNIT - rightShift;
+ }
+ /*
+ * Get pointer to stipple mask array for this depth
+ */
+ fbBits = 0; /* unused */
+ if (pixelsPerDst <= 8)
+ fbBits = fbStippleTable[pixelsPerDst];
+ fbLane = 0;
+ if (transparent && fgand == 0 && dstBpp >= 8)
+ fbLane = fbLaneTable[dstBpp];
+
+ /*
+ * Compute total number of destination words written, but
+ * don't count endmask
+ */
+ nDst = nmiddle;
+ if (startmask)
+ nDst++;
+
+ dstStride -= nDst;
+
+ /*
+ * Compute total number of source words consumed
+ */
+
+ srcinc = (nDst + unitsPerSrc - 1) / unitsPerSrc;
+
+ if (srcX > dstS)
+ srcinc++;
+ if (endmask)
+ {
+ endNeedsLoad = nDst % unitsPerSrc == 0;
+ if (endNeedsLoad)
+ srcinc++;
+ }
+
+ srcStride -= srcinc;
+
+ /*
+ * Copy rectangle
+ */
+ while (height--)
+ {
+ w = nDst; /* total units across scanline */
+ n = unitsPerSrc; /* units avail in single stipple */
+ if (n > w)
+ n = w;
+
+ bitsLeft = 0;
+ if (srcX > dstS)
+ bitsLeft = READ(src++);
+ if (n)
+ {
+ /*
+ * Load first set of stipple bits
+ */
+ LoadBits;
+
+ /*
+ * Consume stipple bits for startmask
+ */
+ if (startmask)
+ {
+#if FB_UNIT > 32
+ if (pixelsPerDst == 16)
+ mask = FbStipple16Bits(FbLeftStipBits(bits,16));
+ else
+#endif
+ mask = fbBits[FbLeftStipBits(bits,pixelsPerDst)];
+ if (fbLane)
+ {
+ fbTransparentSpan (dst, mask & startmask, fgxor, 1);
+ }
+ else
+ {
+ if (mask || !transparent)
+ FbDoLeftMaskByteStippleRRop (dst, mask,
+ fgand, fgxor, bgand, bgxor,
+ startbyte, startmask);
+ }
+ bits = FbStipLeft (bits, pixelsPerDst);
+ dst++;
+ n--;
+ w--;
+ }
+ /*
+ * Consume stipple bits across scanline
+ */
+ for (;;)
+ {
+ w -= n;
+ if (copy)
+ {
+ while (n--)
+ {
+#if FB_UNIT > 32
+ if (pixelsPerDst == 16)
+ mask = FbStipple16Bits(FbLeftStipBits(bits,16));
+ else
+#endif
+ mask = fbBits[FbLeftStipBits(bits,pixelsPerDst)];
+ WRITE(dst, FbOpaqueStipple (mask, fgxor, bgxor));
+ dst++;
+ bits = FbStipLeft(bits, pixelsPerDst);
+ }
+ }
+ else
+ {
+ if (fbLane)
+ {
+ while (bits && n)
+ {
+ switch (fbLane[FbLeftStipBits(bits,pixelsPerDst)]) {
+ LaneCases((CARD8 *) dst);
+ }
+ bits = FbStipLeft(bits,pixelsPerDst);
+ dst++;
+ n--;
+ }
+ dst += n;
+ }
+ else
+ {
+ while (n--)
+ {
+ left = FbLeftStipBits(bits,pixelsPerDst);
+ if (left || !transparent)
+ {
+ mask = fbBits[left];
+ WRITE(dst, FbStippleRRop (READ(dst), mask,
+ fgand, fgxor, bgand, bgxor));
+ }
+ dst++;
+ bits = FbStipLeft(bits, pixelsPerDst);
+ }
+ }
+ }
+ if (!w)
+ break;
+ /*
+ * Load another set and reset number of available units
+ */
+ LoadBits;
+ n = unitsPerSrc;
+ if (n > w)
+ n = w;
+ }
+ }
+ /*
+ * Consume stipple bits for endmask
+ */
+ if (endmask)
+ {
+ if (endNeedsLoad)
+ {
+ LoadBits;
+ }
+#if FB_UNIT > 32
+ if (pixelsPerDst == 16)
+ mask = FbStipple16Bits(FbLeftStipBits(bits,16));
+ else
+#endif
+ mask = fbBits[FbLeftStipBits(bits,pixelsPerDst)];
+ if (fbLane)
+ {
+ fbTransparentSpan (dst, mask & endmask, fgxor, 1);
+ }
+ else
+ {
+ if (mask || !transparent)
+ FbDoRightMaskByteStippleRRop (dst, mask,
+ fgand, fgxor, bgand, bgxor,
+ endbyte, endmask);
+ }
+ }
+ dst += dstStride;
+ src += srcStride;
+ }
+}
+
+
+/*
+ * Crufty macros to initialize the mask array, most of this
+ * is to avoid compile-time warnings about shift overflow
+ */
+
+#if BITMAP_BIT_ORDER == MSBFirst
+#define Mask24Pos(x,r) ((x)*24-(r))
+#else
+#define Mask24Pos(x,r) ((x)*24-((r) ? 24 - (r) : 0))
+#endif
+
+#define Mask24Neg(x,r) (Mask24Pos(x,r) < 0 ? -Mask24Pos(x,r) : 0)
+#define Mask24Check(x,r) (Mask24Pos(x,r) < 0 ? 0 : \
+ Mask24Pos(x,r) >= FB_UNIT ? 0 : Mask24Pos(x,r))
+
+#define Mask24(x,r) (Mask24Pos(x,r) < FB_UNIT ? \
+ (Mask24Pos(x,r) < 0 ? \
+ 0xffffffU >> Mask24Neg (x,r) : \
+ 0xffffffU << Mask24Check(x,r)) : 0)
+
+#define SelMask24(b,n,r) ((((b) >> n) & 1) * Mask24(n,r))
+
+/*
+ * Untested for MSBFirst or FB_UNIT == 32
+ */
+
+#if FB_UNIT == 64
+#define C4_24(b,r) \
+ (SelMask24(b,0,r) | \
+ SelMask24(b,1,r) | \
+ SelMask24(b,2,r) | \
+ SelMask24(b,3,r))
+
+#define FbStip24New(rot) (2 + (rot != 0))
+#define FbStip24Len 4
+
+const FbBits fbStipple24Bits[3][1 << FbStip24Len] = {
+ /* rotate 0 */
+ {
+ C4_24( 0, 0), C4_24( 1, 0), C4_24( 2, 0), C4_24( 3, 0),
+ C4_24( 4, 0), C4_24( 5, 0), C4_24( 6, 0), C4_24( 7, 0),
+ C4_24( 8, 0), C4_24( 9, 0), C4_24(10, 0), C4_24(11, 0),
+ C4_24(12, 0), C4_24(13, 0), C4_24(14, 0), C4_24(15, 0),
+ },
+ /* rotate 8 */
+ {
+ C4_24( 0, 8), C4_24( 1, 8), C4_24( 2, 8), C4_24( 3, 8),
+ C4_24( 4, 8), C4_24( 5, 8), C4_24( 6, 8), C4_24( 7, 8),
+ C4_24( 8, 8), C4_24( 9, 8), C4_24(10, 8), C4_24(11, 8),
+ C4_24(12, 8), C4_24(13, 8), C4_24(14, 8), C4_24(15, 8),
+ },
+ /* rotate 16 */
+ {
+ C4_24( 0,16), C4_24( 1,16), C4_24( 2,16), C4_24( 3,16),
+ C4_24( 4,16), C4_24( 5,16), C4_24( 6,16), C4_24( 7,16),
+ C4_24( 8,16), C4_24( 9,16), C4_24(10,16), C4_24(11,16),
+ C4_24(12,16), C4_24(13,16), C4_24(14,16), C4_24(15,16),
+ }
+};
+
+#endif
+
+#if FB_UNIT == 32
+#define C2_24(b,r) \
+ (SelMask24(b,0,r) | \
+ SelMask24(b,1,r))
+
+#define FbStip24Len 2
+#if BITMAP_BIT_ORDER == MSBFirst
+#define FbStip24New(rot) (1 + (rot == 0))
+#else
+#define FbStip24New(rot) (1 + (rot == 8))
+#endif
+
+const FbBits fbStipple24Bits[3][1 << FbStip24Len] = {
+ /* rotate 0 */
+ {
+ C2_24( 0, 0), C2_24 ( 1, 0), C2_24 ( 2, 0), C2_24 ( 3, 0),
+ },
+ /* rotate 8 */
+ {
+ C2_24( 0, 8), C2_24 ( 1, 8), C2_24 ( 2, 8), C2_24 ( 3, 8),
+ },
+ /* rotate 16 */
+ {
+ C2_24( 0,16), C2_24 ( 1,16), C2_24 ( 2,16), C2_24 ( 3,16),
+ }
+};
+#endif
+
+#if BITMAP_BIT_ORDER == LSBFirst
+
+#define FbMergeStip24Bits(left, right, new) \
+ (FbStipLeft (left, new) | FbStipRight ((right), (FbStip24Len - (new))))
+
+#define FbMergePartStip24Bits(left, right, llen, rlen) \
+ (left | FbStipRight(right, llen))
+
+#else
+
+#define FbMergeStip24Bits(left, right, new) \
+ ((FbStipLeft (left, new) & ((1 << FbStip24Len) - 1)) | right)
+
+#define FbMergePartStip24Bits(left, right, llen, rlen) \
+ (FbStipLeft(left, rlen) | right)
+
+#endif
+
+#define fbFirstStipBits(len,stip) {\
+ int __len = (len); \
+ if (len <= remain) { \
+ stip = FbLeftStipBits(bits, len); \
+ } else { \
+ stip = FbLeftStipBits(bits, remain); \
+ bits = (src < srcEnd ? READ(src++) : 0); \
+ __len = (len) - remain; \
+ stip = FbMergePartStip24Bits(stip, FbLeftStipBits(bits, __len), \
+ remain, __len); \
+ remain = FB_STIP_UNIT; \
+ } \
+ bits = FbStipLeft (bits, __len); \
+ remain -= __len; \
+}
+
+#define fbInitStipBits(offset,len,stip) {\
+ bits = FbStipLeft (READ(src++),offset); \
+ remain = FB_STIP_UNIT - offset; \
+ fbFirstStipBits(len,stip); \
+ stip = FbMergeStip24Bits (0, stip, len); \
+}
+
+#define fbNextStipBits(rot,stip) {\
+ int __new = FbStip24New(rot); \
+ FbStip __right; \
+ fbFirstStipBits(__new, __right); \
+ stip = FbMergeStip24Bits (stip, __right, __new); \
+ rot = FbNext24Rot (rot); \
+}
+
+/*
+ * Use deep mask tables that incorporate rotation, pull
+ * a variable number of bits out of the stipple and
+ * reuse the right bits as needed for the next write
+ *
+ * Yes, this is probably too much code, but most 24-bpp screens
+ * have no acceleration so this code is used for stipples, copyplane
+ * and text
+ */
+void
+fbBltOne24 (FbStip *srcLine,
+ FbStride srcStride, /* FbStip units per scanline */
+ int srcX, /* bit position of source */
+ FbBits *dst,
+ FbStride dstStride, /* FbBits units per scanline */
+ int dstX, /* bit position of dest */
+ int dstBpp, /* bits per destination unit */
+
+ int width, /* width in bits of destination */
+ int height, /* height in scanlines */
+
+ FbBits fgand, /* rrop values */
+ FbBits fgxor,
+ FbBits bgand,
+ FbBits bgxor)
+{
+ FbStip *src, *srcEnd;
+ FbBits leftMask, rightMask, mask;
+ int nlMiddle, nl;
+ FbStip stip, bits;
+ int remain;
+ int dstS;
+ int firstlen;
+ int rot0, rot;
+ int nDst;
+
+ /*
+ * Do not read past the end of the buffer!
+ */
+ srcEnd = srcLine + height * srcStride;
+
+ srcLine += srcX >> FB_STIP_SHIFT;
+ dst += dstX >> FB_SHIFT;
+ srcX &= FB_STIP_MASK;
+ dstX &= FB_MASK;
+ rot0 = FbFirst24Rot (dstX);
+
+ FbMaskBits (dstX, width, leftMask, nlMiddle, rightMask);
+
+ dstS = (dstX + 23) / 24;
+ firstlen = FbStip24Len - dstS;
+
+ nDst = nlMiddle;
+ if (leftMask)
+ nDst++;
+ dstStride -= nDst;
+
+ /* opaque copy */
+ if (bgand == 0 && fgand == 0)
+ {
+ while (height--)
+ {
+ rot = rot0;
+ src = srcLine;
+ srcLine += srcStride;
+ fbInitStipBits (srcX,firstlen, stip);
+ if (leftMask)
+ {
+ mask = fbStipple24Bits[rot >> 3][stip];
+ WRITE(dst, (READ(dst) & ~leftMask) |
+ (FbOpaqueStipple (mask,
+ FbRot24(fgxor, rot),
+ FbRot24(bgxor, rot))
+ & leftMask));
+ dst++;
+ fbNextStipBits(rot,stip);
+ }
+ nl = nlMiddle;
+ while (nl--)
+ {
+ mask = fbStipple24Bits[rot>>3][stip];
+ WRITE(dst, FbOpaqueStipple (mask,
+ FbRot24(fgxor, rot),
+ FbRot24(bgxor, rot)));
+ dst++;
+ fbNextStipBits(rot,stip);
+ }
+ if (rightMask)
+ {
+ mask = fbStipple24Bits[rot >> 3][stip];
+ WRITE(dst, (READ(dst) & ~rightMask) |
+ (FbOpaqueStipple (mask,
+ FbRot24(fgxor, rot),
+ FbRot24(bgxor, rot))
+ & rightMask));
+ }
+ dst += dstStride;
+ src += srcStride;
+ }
+ }
+ /* transparent copy */
+ else if (bgand == FB_ALLONES && bgxor == 0 && fgand == 0)
+ {
+ while (height--)
+ {
+ rot = rot0;
+ src = srcLine;
+ srcLine += srcStride;
+ fbInitStipBits (srcX, firstlen, stip);
+ if (leftMask)
+ {
+ if (stip)
+ {
+ mask = fbStipple24Bits[rot >> 3][stip] & leftMask;
+ WRITE(dst, (READ(dst) & ~mask) | (FbRot24(fgxor, rot) & mask));
+ }
+ dst++;
+ fbNextStipBits (rot, stip);
+ }
+ nl = nlMiddle;
+ while (nl--)
+ {
+ if (stip)
+ {
+ mask = fbStipple24Bits[rot>>3][stip];
+ WRITE(dst, (READ(dst) & ~mask) | (FbRot24(fgxor,rot) & mask));
+ }
+ dst++;
+ fbNextStipBits (rot, stip);
+ }
+ if (rightMask)
+ {
+ if (stip)
+ {
+ mask = fbStipple24Bits[rot >> 3][stip] & rightMask;
+ WRITE(dst, (READ(dst) & ~mask) | (FbRot24(fgxor, rot) & mask));
+ }
+ }
+ dst += dstStride;
+ }
+ }
+ else
+ {
+ while (height--)
+ {
+ rot = rot0;
+ src = srcLine;
+ srcLine += srcStride;
+ fbInitStipBits (srcX, firstlen, stip);
+ if (leftMask)
+ {
+ mask = fbStipple24Bits[rot >> 3][stip];
+ WRITE(dst, FbStippleRRopMask (READ(dst), mask,
+ FbRot24(fgand, rot),
+ FbRot24(fgxor, rot),
+ FbRot24(bgand, rot),
+ FbRot24(bgxor, rot),
+ leftMask));
+ dst++;
+ fbNextStipBits(rot,stip);
+ }
+ nl = nlMiddle;
+ while (nl--)
+ {
+ mask = fbStipple24Bits[rot >> 3][stip];
+ WRITE(dst, FbStippleRRop (READ(dst), mask,
+ FbRot24(fgand, rot),
+ FbRot24(fgxor, rot),
+ FbRot24(bgand, rot),
+ FbRot24(bgxor, rot)));
+ dst++;
+ fbNextStipBits(rot,stip);
+ }
+ if (rightMask)
+ {
+ mask = fbStipple24Bits[rot >> 3][stip];
+ WRITE(dst, FbStippleRRopMask (READ(dst), mask,
+ FbRot24(fgand, rot),
+ FbRot24(fgxor, rot),
+ FbRot24(bgand, rot),
+ FbRot24(bgxor, rot),
+ rightMask));
+ }
+ dst += dstStride;
+ }
+ }
+}
+
+/*
+ * Not very efficient, but simple -- copy a single plane
+ * from an N bit image to a 1 bit image
+ */
+
+void
+fbBltPlane (FbBits *src,
+ FbStride srcStride,
+ int srcX,
+ int srcBpp,
+
+ FbStip *dst,
+ FbStride dstStride,
+ int dstX,
+
+ int width,
+ int height,
+
+ FbStip fgand,
+ FbStip fgxor,
+ FbStip bgand,
+ FbStip bgxor,
+ Pixel planeMask)
+{
+ FbBits *s;
+ FbBits pm;
+ FbBits srcMask;
+ FbBits srcMaskFirst;
+ FbBits srcMask0 = 0;
+ FbBits srcBits;
+
+ FbStip dstBits;
+ FbStip *d;
+ FbStip dstMask;
+ FbStip dstMaskFirst;
+ FbStip dstUnion;
+ int w;
+ int wt;
+ int rot0;
+
+ if (!width)
+ return;
+
+ src += srcX >> FB_SHIFT;
+ srcX &= FB_MASK;
+
+ dst += dstX >> FB_STIP_SHIFT;
+ dstX &= FB_STIP_MASK;
+
+ w = width / srcBpp;
+
+ pm = fbReplicatePixel (planeMask, srcBpp);
+ if (srcBpp == 24)
+ {
+ int w = 24;
+
+ rot0 = FbFirst24Rot (srcX);
+ if (srcX + w > FB_UNIT)
+ w = FB_UNIT - srcX;
+ srcMaskFirst = FbRot24(pm,rot0) & FbBitsMask(srcX,w);
+ }
+ else
+ {
+ rot0 = 0;
+ srcMaskFirst = pm & FbBitsMask(srcX, srcBpp);
+ srcMask0 = pm & FbBitsMask(0, srcBpp);
+ }
+
+ dstMaskFirst = FbStipMask(dstX,1);
+ while (height--)
+ {
+ d = dst;
+ dst += dstStride;
+ s = src;
+ src += srcStride;
+
+ srcMask = srcMaskFirst;
+ if (srcBpp == 24)
+ srcMask0 = FbRot24(pm,rot0) & FbBitsMask(0, srcBpp);
+ srcBits = READ(s++);
+
+ dstMask = dstMaskFirst;
+ dstUnion = 0;
+ dstBits = 0;
+
+ wt = w;
+
+ while (wt--)
+ {
+ if (!srcMask)
+ {
+ srcBits = READ(s++);
+ if (srcBpp == 24)
+ srcMask0 = FbNext24Pix(srcMask0) & FbBitsMask(0,24);
+ srcMask = srcMask0;
+ }
+ if (!dstMask)
+ {
+ WRITE(d, FbStippleRRopMask(READ(d), dstBits,
+ fgand, fgxor, bgand, bgxor,
+ dstUnion));
+ d++;
+ dstMask = FbStipMask(0,1);
+ dstUnion = 0;
+ dstBits = 0;
+ }
+ if (srcBits & srcMask)
+ dstBits |= dstMask;
+ dstUnion |= dstMask;
+ if (srcBpp == FB_UNIT)
+ srcMask = 0;
+ else
+ srcMask = FbScrRight(srcMask,srcBpp);
+ dstMask = FbStipRight(dstMask,1);
+ }
+ if (dstUnion)
+ WRITE(d, FbStippleRRopMask(READ(d),dstBits,
+ fgand, fgxor, bgand, bgxor,
+ dstUnion));
+ }
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 15:20:10 +0000