413 lines
12 KiB
C
413 lines
12 KiB
C
/*
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*
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* Copyright © 1998 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "fb.h"
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#include <X11/fonts/fontstruct.h>
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#include "dixfontstr.h"
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static Bool
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fbGlyphIn(RegionPtr pRegion, int x, int y, int width, int height)
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{
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BoxRec box;
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BoxPtr pExtents = RegionExtents(pRegion);
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/*
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* Check extents by hand to avoid 16 bit overflows
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*/
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if (x < (int) pExtents->x1)
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return FALSE;
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if ((int) pExtents->x2 < x + width)
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return FALSE;
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if (y < (int) pExtents->y1)
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return FALSE;
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if ((int) pExtents->y2 < y + height)
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return FALSE;
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box.x1 = x;
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box.x2 = x + width;
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box.y1 = y;
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box.y2 = y + height;
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return RegionContainsRect(pRegion, &box) == rgnIN;
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}
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#define WRITE1(d,n,fg) WRITE((d) + (n), (CARD8) fg)
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#define WRITE2(d,n,fg) WRITE((CARD16 *) &(d[n]), (CARD16) fg)
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#define WRITE4(d,n,fg) WRITE((CARD32 *) &(d[n]), (CARD32) fg)
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#define WRITE8(d) WRITE4(d,0,_ABCA), WRITE4(d,4,_BCAB)
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/*
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* This is a bit tricky, but it's brief. Write 12 bytes worth
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* of dest, which is four pixels, at a time. This gives constant
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* code for each pattern as they're always aligned the same
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*
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* a b c d a b c d a b c d bytes
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* A B C A B C A B C A B C pixels
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*
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* f0 f1 f2
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* A B C A B C A B C A B C pixels LSB
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* C A B C A B C A B C A B pixels MSB
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*
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* LSB MSB
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* A f0 f1
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* B f1 f2
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* C f2 f0
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* A B f0 f2
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* B C f1 f0
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* C A f2 f1
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* A B C A f0 f1
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* B C A B f1 f2
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* C A B C f2 f0
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*/
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#undef _A
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#undef _B
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#undef _C
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#undef _AB
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#undef _BC
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#undef _CA
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#undef _ABCA
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#undef _BCAB
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#undef _CABC
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#if IMAGE_BYTE_ORDER == MSBFirst
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#define _A f1
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#define _B f2
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#define _C f0
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#define _AB f2
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#define _BC f0
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#define _CA f1
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#define _ABCA f1
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#define _BCAB f2
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#define _CABC f0
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#define CASE(a,b,c,d) ((a << 3) | (b << 2) | (c << 1) | d)
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#else
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#define _A f0
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#define _B f1
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#define _C f2
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#define _AB f0
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#define _BC f1
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#define _CA f2
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#define _ABCA f0
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#define _BCAB f1
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#define _CABC f2
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#define CASE(a,b,c,d) (a | (b << 1) | (c << 2) | (d << 3))
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#endif
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static void
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fbGlyph24(FbBits * dstBits,
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FbStride dstStride,
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int dstBpp, FbStip * stipple, FbBits fg, int x, int height)
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{
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int lshift;
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FbStip bits;
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CARD8 *dstLine;
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CARD8 *dst;
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FbStip f0, f1, f2;
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int n;
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int shift;
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f0 = fg;
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f1 = FbRot24(f0, 16);
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f2 = FbRot24(f0, 8);
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dstLine = (CARD8 *) dstBits;
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dstLine += (x & ~3) * 3;
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dstStride *= (sizeof(FbBits) / sizeof(CARD8));
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shift = x & 3;
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lshift = 4 - shift;
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while (height--) {
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bits = READ(stipple++);
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n = lshift;
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dst = dstLine;
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while (bits) {
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switch (FbStipMoveLsb(FbLeftStipBits(bits, n), 4, n)) {
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case CASE(0, 0, 0, 0):
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break;
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case CASE(1, 0, 0, 0):
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WRITE2(dst, 0, _AB);
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WRITE1(dst, 2, _C);
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break;
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case CASE(0, 1, 0, 0):
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WRITE1(dst, 3, _A);
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WRITE2(dst, 4, _BC);
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break;
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case CASE(1, 1, 0, 0):
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WRITE4(dst, 0, _ABCA);
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WRITE2(dst, 4, _BC);
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break;
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case CASE(0, 0, 1, 0):
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WRITE2(dst, 6, _AB);
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WRITE1(dst, 8, _C);
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break;
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case CASE(1, 0, 1, 0):
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WRITE2(dst, 0, _AB);
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WRITE1(dst, 2, _C);
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WRITE2(dst, 6, _AB);
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WRITE1(dst, 8, _C);
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break;
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case CASE(0, 1, 1, 0):
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WRITE1(dst, 3, _A);
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WRITE4(dst, 4, _BCAB);
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WRITE1(dst, 8, _C);
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break;
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case CASE(1, 1, 1, 0):
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WRITE8(dst);
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WRITE1(dst, 8, _C);
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break;
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case CASE(0, 0, 0, 1):
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WRITE1(dst, 9, _A);
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WRITE2(dst, 10, _BC);
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break;
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case CASE(1, 0, 0, 1):
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WRITE2(dst, 0, _AB);
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WRITE1(dst, 2, _C);
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WRITE1(dst, 9, _A);
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WRITE2(dst, 10, _BC);
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break;
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case CASE(0, 1, 0, 1):
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WRITE1(dst, 3, _A);
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WRITE2(dst, 4, _BC);
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WRITE1(dst, 9, _A);
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WRITE2(dst, 10, _BC);
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break;
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case CASE(1, 1, 0, 1):
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WRITE4(dst, 0, _ABCA);
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WRITE2(dst, 4, _BC);
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WRITE1(dst, 9, _A);
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WRITE2(dst, 10, _BC);
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break;
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case CASE(0, 0, 1, 1):
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WRITE2(dst, 6, _AB);
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WRITE4(dst, 8, _CABC);
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break;
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case CASE(1, 0, 1, 1):
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WRITE2(dst, 0, _AB);
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WRITE1(dst, 2, _C);
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WRITE2(dst, 6, _AB);
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WRITE4(dst, 8, _CABC);
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break;
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case CASE(0, 1, 1, 1):
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WRITE1(dst, 3, _A);
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WRITE4(dst, 4, _BCAB);
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WRITE4(dst, 8, _CABC);
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break;
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case CASE(1, 1, 1, 1):
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WRITE8(dst);
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WRITE4(dst, 8, _CABC);
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break;
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}
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bits = FbStipLeft(bits, n);
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n = 4;
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dst += 12;
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}
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dstLine += dstStride;
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}
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}
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void
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fbPolyGlyphBlt(DrawablePtr pDrawable,
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GCPtr pGC,
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int x,
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int y,
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unsigned int nglyph, CharInfoPtr * ppci, void *pglyphBase)
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{
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FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
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CharInfoPtr pci;
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unsigned char *pglyph; /* pointer bits in glyph */
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int gx, gy;
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int gWidth, gHeight; /* width and height of glyph */
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FbStride gStride; /* stride of glyph */
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void (*glyph) (FbBits *, FbStride, int, FbStip *, FbBits, int, int);
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FbBits *dst = 0;
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FbStride dstStride = 0;
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int dstBpp = 0;
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int dstXoff = 0, dstYoff = 0;
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glyph = 0;
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if (pGC->fillStyle == FillSolid && pPriv->and == 0) {
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dstBpp = pDrawable->bitsPerPixel;
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switch (dstBpp) {
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case 8:
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glyph = fbGlyph8;
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break;
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case 16:
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glyph = fbGlyph16;
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break;
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case 24:
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glyph = fbGlyph24;
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break;
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case 32:
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glyph = fbGlyph32;
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break;
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}
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}
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x += pDrawable->x;
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y += pDrawable->y;
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while (nglyph--) {
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pci = *ppci++;
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pglyph = FONTGLYPHBITS(pglyphBase, pci);
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gWidth = GLYPHWIDTHPIXELS(pci);
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gHeight = GLYPHHEIGHTPIXELS(pci);
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if (gWidth && gHeight) {
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gx = x + pci->metrics.leftSideBearing;
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gy = y - pci->metrics.ascent;
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if (glyph && gWidth <= sizeof(FbStip) * 8 &&
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fbGlyphIn(fbGetCompositeClip(pGC), gx, gy, gWidth, gHeight)) {
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fbGetDrawable(pDrawable, dst, dstStride, dstBpp, dstXoff,
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dstYoff);
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(*glyph) (dst + (gy + dstYoff) * dstStride, dstStride, dstBpp,
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(FbStip *) pglyph, pPriv->xor, gx + dstXoff, gHeight);
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fbFinishAccess(pDrawable);
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}
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else {
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gStride = GLYPHWIDTHBYTESPADDED(pci) / sizeof(FbStip);
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fbPushImage(pDrawable,
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pGC,
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(FbStip *) pglyph,
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gStride, 0, gx, gy, gWidth, gHeight);
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}
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}
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x += pci->metrics.characterWidth;
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}
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}
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void
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fbImageGlyphBlt(DrawablePtr pDrawable,
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GCPtr pGC,
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int x,
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int y,
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unsigned int nglyph, CharInfoPtr * ppciInit, void *pglyphBase)
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{
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FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
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CharInfoPtr *ppci;
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CharInfoPtr pci;
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unsigned char *pglyph; /* pointer bits in glyph */
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int gWidth, gHeight; /* width and height of glyph */
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FbStride gStride; /* stride of glyph */
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Bool opaque;
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int n;
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int gx, gy;
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void (*glyph) (FbBits *, FbStride, int, FbStip *, FbBits, int, int);
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FbBits *dst = 0;
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FbStride dstStride = 0;
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int dstBpp = 0;
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int dstXoff = 0, dstYoff = 0;
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glyph = 0;
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if (pPriv->and == 0) {
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dstBpp = pDrawable->bitsPerPixel;
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switch (dstBpp) {
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case 8:
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glyph = fbGlyph8;
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break;
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case 16:
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glyph = fbGlyph16;
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break;
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case 24:
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glyph = fbGlyph24;
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break;
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case 32:
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glyph = fbGlyph32;
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break;
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}
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}
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x += pDrawable->x;
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y += pDrawable->y;
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if (TERMINALFONT(pGC->font)
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&& !glyph) {
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opaque = TRUE;
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}
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else {
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int xBack, widthBack;
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int yBack, heightBack;
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ppci = ppciInit;
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n = nglyph;
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widthBack = 0;
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while (n--)
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widthBack += (*ppci++)->metrics.characterWidth;
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xBack = x;
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if (widthBack < 0) {
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xBack += widthBack;
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widthBack = -widthBack;
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}
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yBack = y - FONTASCENT(pGC->font);
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heightBack = FONTASCENT(pGC->font) + FONTDESCENT(pGC->font);
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fbSolidBoxClipped(pDrawable,
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fbGetCompositeClip(pGC),
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xBack,
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yBack,
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xBack + widthBack,
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yBack + heightBack,
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fbAnd(GXcopy, pPriv->bg, pPriv->pm),
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fbXor(GXcopy, pPriv->bg, pPriv->pm));
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opaque = FALSE;
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}
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ppci = ppciInit;
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while (nglyph--) {
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pci = *ppci++;
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pglyph = FONTGLYPHBITS(pglyphBase, pci);
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gWidth = GLYPHWIDTHPIXELS(pci);
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gHeight = GLYPHHEIGHTPIXELS(pci);
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if (gWidth && gHeight) {
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gx = x + pci->metrics.leftSideBearing;
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gy = y - pci->metrics.ascent;
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if (glyph && gWidth <= sizeof(FbStip) * 8 &&
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fbGlyphIn(fbGetCompositeClip(pGC), gx, gy, gWidth, gHeight)) {
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fbGetDrawable(pDrawable, dst, dstStride, dstBpp, dstXoff,
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dstYoff);
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(*glyph) (dst + (gy + dstYoff) * dstStride, dstStride, dstBpp,
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(FbStip *) pglyph, pPriv->fg, gx + dstXoff, gHeight);
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fbFinishAccess(pDrawable);
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}
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else {
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gStride = GLYPHWIDTHBYTESPADDED(pci) / sizeof(FbStip);
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fbPutXYImage(pDrawable,
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fbGetCompositeClip(pGC),
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pPriv->fg,
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pPriv->bg,
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pPriv->pm,
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GXcopy,
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opaque,
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gx,
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gy,
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gWidth, gHeight, (FbStip *) pglyph, gStride, 0);
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}
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}
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x += pci->metrics.characterWidth;
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}
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}
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