366 lines
10 KiB
C
366 lines
10 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 <stdlib.h>
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#include "fb.h"
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PixmapPtr
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fbCreatePixmapBpp(ScreenPtr pScreen, int width, int height, int depth, int bpp)
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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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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 = (pointer) ((char *) pPixmap + base + adjust);
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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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return pPixmap;
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}
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PixmapPtr
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fbCreatePixmap(ScreenPtr pScreen, int width, int height, int depth)
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{
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int bpp;
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bpp = BitsPerPixel(depth);
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if (bpp == 32 && depth <= 24)
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bpp = fbGetScreenPrivate(pScreen)->pix32bpp;
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return fbCreatePixmapBpp(pScreen, width, height, depth, bpp);
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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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free(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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miRectAlloc(reg, 1); \
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fr = REGION_BOXPTR(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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RegionPtr pReg;
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FbBits *pw, w;
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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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BoxPtr prectO, prectN;
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BoxPtr FirstRect, rects, prectLineStart;
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Bool fInBox, fSame;
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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 = REGION_CREATE(NULL, 1);
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if (!pReg)
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return NullRegion;
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FirstRect = REGION_BOXPTR(pReg);
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rects = FirstRect;
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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 (*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 = *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 = *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 = REGION_BOXPTR(pReg)->y1;
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pReg->extents.y2 = REGION_END(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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#ifdef DEBUG
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if (!miValidRegion(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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#include <stdio.h>
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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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fprintf(stderr, "fbValidateBits failed\n");
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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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}
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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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}
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#endif /* FB_DEBUG */
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