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/*
*
* 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 <stdlib.h>
#include "fb.h"
PixmapPtr
fbCreatePixmapBpp(ScreenPtr pScreen, int width, int height, int depth, int bpp)
{
PixmapPtr pPixmap;
size_t datasize;
size_t paddedWidth;
int adjust;
int base;
paddedWidth = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof(FbBits);
if (paddedWidth / 4 > 32767 || height > 32767)
return NullPixmap;
datasize = height * paddedWidth;
base = pScreen->totalPixmapSize;
adjust = 0;
if (base & 7)
adjust = 8 - (base & 7);
datasize += adjust;
#ifdef FB_DEBUG
datasize += 2 * paddedWidth;
#endif
pPixmap = AllocatePixmap(pScreen, datasize);
if (!pPixmap)
return NullPixmap;
pPixmap->drawable.type = DRAWABLE_PIXMAP;
pPixmap->drawable.class = 0;
pPixmap->drawable.pScreen = pScreen;
pPixmap->drawable.depth = depth;
pPixmap->drawable.bitsPerPixel = bpp;
pPixmap->drawable.id = 0;
pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
pPixmap->drawable.x = 0;
pPixmap->drawable.y = 0;
pPixmap->drawable.width = width;
pPixmap->drawable.height = height;
pPixmap->devKind = paddedWidth;
pPixmap->refcnt = 1;
pPixmap->devPrivate.ptr = (pointer) ((char *) pPixmap + base + adjust);
#ifdef FB_DEBUG
pPixmap->devPrivate.ptr =
(void *) ((char *) pPixmap->devPrivate.ptr + paddedWidth);
fbInitializeDrawable(&pPixmap->drawable);
#endif
return pPixmap;
}
PixmapPtr
fbCreatePixmap(ScreenPtr pScreen, int width, int height, int depth)
{
int bpp;
bpp = BitsPerPixel(depth);
if (bpp == 32 && depth <= 24)
bpp = fbGetScreenPrivate(pScreen)->pix32bpp;
return fbCreatePixmapBpp(pScreen, width, height, depth, bpp);
}
Bool
fbDestroyPixmap(PixmapPtr pPixmap)
{
if (--pPixmap->refcnt)
return TRUE;
free(pPixmap);
return TRUE;
}
#define ADDRECT(reg,r,fr,rx1,ry1,rx2,ry2) \
if (((rx1) < (rx2)) && ((ry1) < (ry2)) && \
(!((reg)->data->numRects && \
((r-1)->y1 == (ry1)) && \
((r-1)->y2 == (ry2)) && \
((r-1)->x1 <= (rx1)) && \
((r-1)->x2 >= (rx2))))) \
{ \
if ((reg)->data->numRects == (reg)->data->size) \
{ \
miRectAlloc(reg, 1); \
fr = REGION_BOXPTR(reg); \
r = fr + (reg)->data->numRects; \
} \
r->x1 = (rx1); \
r->y1 = (ry1); \
r->x2 = (rx2); \
r->y2 = (ry2); \
(reg)->data->numRects++; \
if(r->x1 < (reg)->extents.x1) \
(reg)->extents.x1 = r->x1; \
if(r->x2 > (reg)->extents.x2) \
(reg)->extents.x2 = r->x2; \
r++; \
}
/* Convert bitmap clip mask into clipping region.
* First, goes through each line and makes boxes by noting the transitions
* from 0 to 1 and 1 to 0.
* Then it coalesces the current line with the previous if they have boxes
* at the same X coordinates.
*/
RegionPtr
fbPixmapToRegion(PixmapPtr pPix)
{
RegionPtr pReg;
FbBits *pw, w;
int ib;
int width, h, base, rx1 = 0, crects;
FbBits *pwLineEnd;
int irectPrevStart, irectLineStart;
BoxPtr prectO, prectN;
BoxPtr FirstRect, rects, prectLineStart;
Bool fInBox, fSame;
FbBits mask0 = FB_ALLONES & ~FbScrRight(FB_ALLONES, 1);
FbBits *pwLine;
int nWidth;
pReg = REGION_CREATE(NULL, 1);
if (!pReg)
return NullRegion;
FirstRect = REGION_BOXPTR(pReg);
rects = FirstRect;
pwLine = (FbBits *) pPix->devPrivate.ptr;
nWidth = pPix->devKind >> (FB_SHIFT - 3);
width = pPix->drawable.width;
pReg->extents.x1 = width - 1;
pReg->extents.x2 = 0;
irectPrevStart = -1;
for (h = 0; h < pPix->drawable.height; h++) {
pw = pwLine;
pwLine += nWidth;
irectLineStart = rects - FirstRect;
/* If the Screen left most bit of the word is set, we're starting in
* a box */
if (*pw & mask0) {
fInBox = TRUE;
rx1 = 0;
}
else
fInBox = FALSE;
/* Process all words which are fully in the pixmap */
pwLineEnd = pw + (width >> FB_SHIFT);
for (base = 0; pw < pwLineEnd; base += FB_UNIT) {
w = *pw++;
if (fInBox) {
if (!~w)
continue;
}
else {
if (!w)
continue;
}
for (ib = 0; ib < FB_UNIT; ib++) {
/* If the Screen left most bit of the word is set, we're
* starting a box */
if (w & mask0) {
if (!fInBox) {
rx1 = base + ib;
/* start new box */
fInBox = TRUE;
}
}
else {
if (fInBox) {
/* end box */
ADDRECT(pReg, rects, FirstRect,
rx1, h, base + ib, h + 1);
fInBox = FALSE;
}
}
/* Shift the word VISUALLY left one. */
w = FbScrLeft(w, 1);
}
}
if (width & FB_MASK) {
/* Process final partial word on line */
w = *pw++;
for (ib = 0; ib < (width & FB_MASK); ib++) {
/* If the Screen left most bit of the word is set, we're
* starting a box */
if (w & mask0) {
if (!fInBox) {
rx1 = base + ib;
/* start new box */
fInBox = TRUE;
}
}
else {
if (fInBox) {
/* end box */
ADDRECT(pReg, rects, FirstRect,
rx1, h, base + ib, h + 1);
fInBox = FALSE;
}
}
/* Shift the word VISUALLY left one. */
w = FbScrLeft(w, 1);
}
}
/* If scanline ended with last bit set, end the box */
if (fInBox) {
ADDRECT(pReg, rects, FirstRect,
rx1, h, base + (width & FB_MASK), h + 1);
}
/* if all rectangles on this line have the same x-coords as
* those on the previous line, then add 1 to all the previous y2s and
* throw away all the rectangles from this line
*/
fSame = FALSE;
if (irectPrevStart != -1) {
crects = irectLineStart - irectPrevStart;
if (crects == ((rects - FirstRect) - irectLineStart)) {
prectO = FirstRect + irectPrevStart;
prectN = prectLineStart = FirstRect + irectLineStart;
fSame = TRUE;
while (prectO < prectLineStart) {
if ((prectO->x1 != prectN->x1) ||
(prectO->x2 != prectN->x2)) {
fSame = FALSE;
break;
}
prectO++;
prectN++;
}
if (fSame) {
prectO = FirstRect + irectPrevStart;
while (prectO < prectLineStart) {
prectO->y2 += 1;
prectO++;
}
rects -= crects;
pReg->data->numRects -= crects;
}
}
}
if (!fSame)
irectPrevStart = irectLineStart;
}
if (!pReg->data->numRects)
pReg->extents.x1 = pReg->extents.x2 = 0;
else {
pReg->extents.y1 = REGION_BOXPTR(pReg)->y1;
pReg->extents.y2 = REGION_END(pReg)->y2;
if (pReg->data->numRects == 1) {
free(pReg->data);
pReg->data = (RegDataPtr) NULL;
}
}
#ifdef DEBUG
if (!miValidRegion(pReg))
FatalError("Assertion failed file %s, line %d: expr\n", __FILE__,
__LINE__);
#endif
return (pReg);
}
#ifdef FB_DEBUG
#include <stdio.h>
static Bool
fbValidateBits(FbStip * bits, int stride, FbStip data)
{
while (stride--) {
if (*bits != data) {
fprintf(stderr, "fbValidateBits failed\n");
return FALSE;
}
bits++;
}
}
void
fbValidateDrawable(DrawablePtr pDrawable)
{
FbStip *bits, *first, *last;
int stride, bpp;
int xoff, yoff;
int height;
Bool failed;
if (pDrawable->type != DRAWABLE_PIXMAP)
pDrawable = (DrawablePtr) fbGetWindowPixmap(pDrawable);
fbGetStipDrawable(pDrawable, bits, stride, bpp, xoff, yoff);
first = bits - stride;
last = bits + stride * pDrawable->height;
if (!fbValidateBits(first, stride, FB_HEAD_BITS) ||
!fbValidateBits(last, stride, FB_TAIL_BITS))
fbInitializeDrawable(pDrawable);
}
void
fbSetBits(FbStip * bits, int stride, FbStip data)
{
while (stride--)
*bits++ = data;
}
void
fbInitializeDrawable(DrawablePtr pDrawable)
{
FbStip *bits, *first, *last;
int stride, bpp;
int xoff, yoff;
fbGetStipDrawable(pDrawable, bits, stride, bpp, xoff, yoff);
first = bits - stride;
last = bits + stride * pDrawable->height;
fbSetBits(first, stride, FB_HEAD_BITS);
fbSetBits(last, stride, FB_TAIL_BITS);
}
#endif /* FB_DEBUG */