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https://github.com/X11Libre/xserver.git
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d708b28adc
It's always enabled for very long time now (at least since meson transition), there doesn't seem to be any need to ever disable it again. So we can reduce code complexity by removing all the ifdef's. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
361 lines
11 KiB
C
361 lines
11 KiB
C
/*
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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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#include <dix-config.h>
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#include <stdlib.h>
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#include "fb/fb_priv.h"
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#ifdef FB_DEBUG
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static void fbInitializeDrawable(DrawablePtr pDrawable);
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#else
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static inline void fbInitializeDrawable(DrawablePtr pDrawable) {}
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#endif
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PixmapPtr
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fbCreatePixmap(ScreenPtr pScreen, int width, int height, int depth,
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unsigned usage_hint)
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{
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PixmapPtr pPixmap;
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size_t datasize;
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size_t paddedWidth;
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int adjust;
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int base;
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int bpp = BitsPerPixel(depth);
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paddedWidth = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof(FbBits);
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if (paddedWidth / 4 > 32767 || height > 32767)
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return NullPixmap;
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datasize = height * paddedWidth;
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base = pScreen->totalPixmapSize;
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adjust = 0;
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if (base & 7)
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adjust = 8 - (base & 7);
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datasize += adjust;
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#ifdef FB_DEBUG
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datasize += 2 * paddedWidth;
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#endif
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pPixmap = AllocatePixmap(pScreen, datasize);
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if (!pPixmap)
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return NullPixmap;
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pPixmap->drawable.type = DRAWABLE_PIXMAP;
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pPixmap->drawable.class = 0;
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pPixmap->drawable.pScreen = pScreen;
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pPixmap->drawable.depth = depth;
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pPixmap->drawable.bitsPerPixel = bpp;
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pPixmap->drawable.id = 0;
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pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
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pPixmap->drawable.x = 0;
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pPixmap->drawable.y = 0;
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pPixmap->drawable.width = width;
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pPixmap->drawable.height = height;
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pPixmap->devKind = paddedWidth;
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pPixmap->refcnt = 1;
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pPixmap->devPrivate.ptr = (void *) ((char *) pPixmap + base + adjust);
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pPixmap->primary_pixmap = NULL;
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#ifdef FB_DEBUG
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pPixmap->devPrivate.ptr =
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(void *) ((char *) pPixmap->devPrivate.ptr + paddedWidth);
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fbInitializeDrawable(&pPixmap->drawable);
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#endif
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pPixmap->screen_x = 0;
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pPixmap->screen_y = 0;
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pPixmap->usage_hint = usage_hint;
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return pPixmap;
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}
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Bool
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fbDestroyPixmap(PixmapPtr pPixmap)
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{
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if (--pPixmap->refcnt)
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return TRUE;
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FreePixmap(pPixmap);
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return TRUE;
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}
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#define ADDRECT(reg,r,fr,rx1,ry1,rx2,ry2) \
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if (((rx1) < (rx2)) && ((ry1) < (ry2)) && \
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(!((reg)->data->numRects && \
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((r-1)->y1 == (ry1)) && \
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((r-1)->y2 == (ry2)) && \
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((r-1)->x1 <= (rx1)) && \
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((r-1)->x2 >= (rx2))))) \
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{ \
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if ((reg)->data->numRects == (reg)->data->size) \
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{ \
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RegionRectAlloc(reg, 1); \
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fr = RegionBoxptr(reg); \
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r = fr + (reg)->data->numRects; \
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} \
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r->x1 = (rx1); \
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r->y1 = (ry1); \
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r->x2 = (rx2); \
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r->y2 = (ry2); \
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(reg)->data->numRects++; \
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if(r->x1 < (reg)->extents.x1) \
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(reg)->extents.x1 = r->x1; \
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if(r->x2 > (reg)->extents.x2) \
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(reg)->extents.x2 = r->x2; \
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r++; \
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}
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/* Convert bitmap clip mask into clipping region.
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* First, goes through each line and makes boxes by noting the transitions
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* from 0 to 1 and 1 to 0.
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* Then it coalesces the current line with the previous if they have boxes
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* at the same X coordinates.
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*/
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RegionPtr
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fbPixmapToRegion(PixmapPtr pPix)
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{
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register RegionPtr pReg;
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FbBits *pw, w;
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register int ib;
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int width, h, base, rx1 = 0, crects;
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FbBits *pwLineEnd;
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int irectPrevStart, irectLineStart;
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register BoxPtr prectO, prectN;
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BoxPtr FirstRect, rects, prectLineStart;
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Bool fInBox, fSame;
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register FbBits mask0 = FB_ALLONES & ~FbScrRight(FB_ALLONES, 1);
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FbBits *pwLine;
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int nWidth;
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pReg = RegionCreate(NULL, 1);
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if (!pReg)
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return NullRegion;
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FirstRect = RegionBoxptr(pReg);
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rects = FirstRect;
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fbPrepareAccess(&pPix->drawable);
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pwLine = (FbBits *) pPix->devPrivate.ptr;
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nWidth = pPix->devKind >> (FB_SHIFT - 3);
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width = pPix->drawable.width;
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pReg->extents.x1 = width - 1;
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pReg->extents.x2 = 0;
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irectPrevStart = -1;
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for (h = 0; h < pPix->drawable.height; h++) {
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pw = pwLine;
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pwLine += nWidth;
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irectLineStart = rects - FirstRect;
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/* If the Screen left most bit of the word is set, we're starting in
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* a box */
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if (READ(pw) & mask0) {
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fInBox = TRUE;
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rx1 = 0;
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}
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else
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fInBox = FALSE;
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/* Process all words which are fully in the pixmap */
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pwLineEnd = pw + (width >> FB_SHIFT);
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for (base = 0; pw < pwLineEnd; base += FB_UNIT) {
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w = READ(pw++);
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if (fInBox) {
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if (!~w)
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continue;
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}
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else {
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if (!w)
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continue;
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}
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for (ib = 0; ib < FB_UNIT; ib++) {
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/* If the Screen left most bit of the word is set, we're
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* starting a box */
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if (w & mask0) {
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if (!fInBox) {
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rx1 = base + ib;
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/* start new box */
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fInBox = TRUE;
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}
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}
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else {
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if (fInBox) {
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/* end box */
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ADDRECT(pReg, rects, FirstRect,
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rx1, h, base + ib, h + 1);
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fInBox = FALSE;
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}
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}
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/* Shift the word VISUALLY left one. */
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w = FbScrLeft(w, 1);
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}
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}
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if (width & FB_MASK) {
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/* Process final partial word on line */
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w = READ(pw++);
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for (ib = 0; ib < (width & FB_MASK); ib++) {
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/* If the Screen left most bit of the word is set, we're
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* starting a box */
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if (w & mask0) {
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if (!fInBox) {
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rx1 = base + ib;
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/* start new box */
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fInBox = TRUE;
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}
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}
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else {
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if (fInBox) {
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/* end box */
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ADDRECT(pReg, rects, FirstRect,
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rx1, h, base + ib, h + 1);
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fInBox = FALSE;
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}
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}
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/* Shift the word VISUALLY left one. */
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w = FbScrLeft(w, 1);
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}
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}
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/* If scanline ended with last bit set, end the box */
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if (fInBox) {
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ADDRECT(pReg, rects, FirstRect,
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rx1, h, base + (width & FB_MASK), h + 1);
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}
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/* if all rectangles on this line have the same x-coords as
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* those on the previous line, then add 1 to all the previous y2s and
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* throw away all the rectangles from this line
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*/
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fSame = FALSE;
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if (irectPrevStart != -1) {
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crects = irectLineStart - irectPrevStart;
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if (crects == ((rects - FirstRect) - irectLineStart)) {
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prectO = FirstRect + irectPrevStart;
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prectN = prectLineStart = FirstRect + irectLineStart;
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fSame = TRUE;
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while (prectO < prectLineStart) {
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if ((prectO->x1 != prectN->x1) ||
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(prectO->x2 != prectN->x2)) {
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fSame = FALSE;
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break;
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}
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prectO++;
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prectN++;
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}
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if (fSame) {
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prectO = FirstRect + irectPrevStart;
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while (prectO < prectLineStart) {
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prectO->y2 += 1;
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prectO++;
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}
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rects -= crects;
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pReg->data->numRects -= crects;
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}
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}
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}
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if (!fSame)
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irectPrevStart = irectLineStart;
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}
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if (!pReg->data->numRects)
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pReg->extents.x1 = pReg->extents.x2 = 0;
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else {
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pReg->extents.y1 = RegionBoxptr(pReg)->y1;
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pReg->extents.y2 = RegionEnd(pReg)->y2;
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if (pReg->data->numRects == 1) {
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free(pReg->data);
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pReg->data = (RegDataPtr) NULL;
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}
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}
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fbFinishAccess(&pPix->drawable);
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#ifdef DEBUG
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if (!RegionIsValid(pReg))
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FatalError("Assertion failed file %s, line %d: expr\n", __FILE__,
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__LINE__);
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#endif
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return pReg;
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}
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#ifdef FB_DEBUG
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#ifndef WIN32
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#include <stdio.h>
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#else
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#include <dbg.h>
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#endif
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static Bool
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fbValidateBits(FbStip * bits, int stride, FbStip data)
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{
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while (stride--) {
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if (*bits != data) {
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#ifdef WIN32
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NCD_DEBUG((DEBUG_FAILURE,
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"fdValidateBits failed at 0x%x (is 0x%x want 0x%x)",
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bits, *bits, data));
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#else
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fprintf(stderr, "fbValidateBits failed\n");
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#endif
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return FALSE;
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}
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bits++;
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}
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}
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void
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fbValidateDrawable(DrawablePtr pDrawable)
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{
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FbStip *bits, *first, *last;
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int stride, bpp;
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int xoff, yoff;
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int height;
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Bool failed;
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if (pDrawable->type != DRAWABLE_PIXMAP)
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pDrawable = (DrawablePtr) fbGetWindowPixmap(pDrawable);
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fbGetStipDrawable(pDrawable, bits, stride, bpp, xoff, yoff);
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first = bits - stride;
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last = bits + stride * pDrawable->height;
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if (!fbValidateBits(first, stride, FB_HEAD_BITS) ||
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!fbValidateBits(last, stride, FB_TAIL_BITS))
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fbInitializeDrawable(pDrawable);
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fbFinishAccess(pDrawable);
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}
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void
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fbSetBits(FbStip * bits, int stride, FbStip data)
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{
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while (stride--)
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*bits++ = data;
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}
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void
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fbInitializeDrawable(DrawablePtr pDrawable)
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{
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FbStip *bits, *first, *last;
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int stride, bpp;
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int xoff, yoff;
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fbGetStipDrawable(pDrawable, bits, stride, bpp, xoff, yoff);
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first = bits - stride;
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last = bits + stride * pDrawable->height;
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fbSetBits(first, stride, FB_HEAD_BITS);
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fbSetBits(last, stride, FB_TAIL_BITS);
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fbFinishAccess(pDrawable);
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}
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#endif /* FB_DEBUG */
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