307 lines
7.6 KiB
C
307 lines
7.6 KiB
C
/*
|
|
* $XFree86: xc/programs/Xserver/miext/shadow/shrotate.c,v 1.4tsi Exp $
|
|
*
|
|
* Copyright © 2001 Keith Packard, member of The XFree86 Project, Inc.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "X.h"
|
|
#include "scrnintstr.h"
|
|
#include "windowstr.h"
|
|
#include "font.h"
|
|
#include "dixfontstr.h"
|
|
#include "fontstruct.h"
|
|
#include "mi.h"
|
|
#include "regionstr.h"
|
|
#include "globals.h"
|
|
#include "gcstruct.h"
|
|
#include "shadow.h"
|
|
#include "fb.h"
|
|
|
|
/*
|
|
* These indicate which way the source (shadow) is scanned when
|
|
* walking the screen in a particular direction
|
|
*/
|
|
|
|
#define LEFT_TO_RIGHT 1
|
|
#define RIGHT_TO_LEFT -1
|
|
#define TOP_TO_BOTTOM 2
|
|
#define BOTTOM_TO_TOP -2
|
|
|
|
void
|
|
shadowUpdateRotatePacked (ScreenPtr pScreen,
|
|
shadowBufPtr pBuf)
|
|
{
|
|
RegionPtr damage = &pBuf->damage;
|
|
PixmapPtr pShadow = pBuf->pPixmap;
|
|
int nbox = REGION_NUM_RECTS (damage);
|
|
BoxPtr pbox = REGION_RECTS (damage);
|
|
FbBits *shaBits;
|
|
FbStride shaStride;
|
|
int shaBpp;
|
|
int shaXoff, shaYoff;
|
|
int box_x1, box_x2, box_y1, box_y2;
|
|
int sha_x1 = 0, sha_y1 = 0;
|
|
int scr_x1 = 0, scr_x2 = 0, scr_y1 = 0, scr_y2 = 0, scr_w, scr_h;
|
|
int scr_x, scr_y;
|
|
int w;
|
|
int pixelsPerBits;
|
|
int pixelsMask;
|
|
FbStride shaStepOverY = 0, shaStepDownY = 0;
|
|
FbStride shaStepOverX = 0, shaStepDownX = 0;
|
|
FbBits *shaLine, *sha;
|
|
int shaHeight = pShadow->drawable.height;
|
|
int shaWidth = pShadow->drawable.width;
|
|
FbBits shaMask;
|
|
int shaFirstShift, shaShift;
|
|
int o_x_dir;
|
|
int o_y_dir;
|
|
int x_dir;
|
|
int y_dir;
|
|
|
|
fbGetDrawable (&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff, shaYoff);
|
|
pixelsPerBits = (sizeof (FbBits) * 8) / shaBpp;
|
|
pixelsMask = ~(pixelsPerBits - 1);
|
|
shaMask = FbBitsMask (FB_UNIT-shaBpp, shaBpp);
|
|
/*
|
|
* Compute rotation related constants to walk the shadow
|
|
*/
|
|
o_x_dir = LEFT_TO_RIGHT;
|
|
o_y_dir = TOP_TO_BOTTOM;
|
|
if (pBuf->randr & SHADOW_REFLECT_X)
|
|
o_x_dir = -o_x_dir;
|
|
if (pBuf->randr & SHADOW_REFLECT_Y)
|
|
o_y_dir = -o_y_dir;
|
|
switch (pBuf->randr & (SHADOW_ROTATE_ALL)) {
|
|
case SHADOW_ROTATE_0: /* upper left shadow -> upper left screen */
|
|
default:
|
|
x_dir = o_x_dir;
|
|
y_dir = o_y_dir;
|
|
break;
|
|
case SHADOW_ROTATE_90: /* upper right shadow -> upper left screen */
|
|
x_dir = o_y_dir;
|
|
y_dir = -o_x_dir;
|
|
break;
|
|
case SHADOW_ROTATE_180: /* lower right shadow -> upper left screen */
|
|
x_dir = -o_x_dir;
|
|
y_dir = -o_y_dir;
|
|
break;
|
|
case SHADOW_ROTATE_270: /* lower left shadow -> upper left screen */
|
|
x_dir = -o_y_dir;
|
|
y_dir = o_x_dir;
|
|
break;
|
|
}
|
|
switch (x_dir) {
|
|
case LEFT_TO_RIGHT:
|
|
shaStepOverX = shaBpp;
|
|
shaStepOverY = 0;
|
|
break;
|
|
case TOP_TO_BOTTOM:
|
|
shaStepOverX = 0;
|
|
shaStepOverY = shaStride;
|
|
break;
|
|
case RIGHT_TO_LEFT:
|
|
shaStepOverX = -shaBpp;
|
|
shaStepOverY = 0;
|
|
break;
|
|
case BOTTOM_TO_TOP:
|
|
shaStepOverX = 0;
|
|
shaStepOverY = -shaStride;
|
|
break;
|
|
}
|
|
switch (y_dir) {
|
|
case TOP_TO_BOTTOM:
|
|
shaStepDownX = 0;
|
|
shaStepDownY = shaStride;
|
|
break;
|
|
case RIGHT_TO_LEFT:
|
|
shaStepDownX = -shaBpp;
|
|
shaStepDownY = 0;
|
|
break;
|
|
case BOTTOM_TO_TOP:
|
|
shaStepDownX = 0;
|
|
shaStepDownY = -shaStride;
|
|
break;
|
|
case LEFT_TO_RIGHT:
|
|
shaStepDownX = shaBpp;
|
|
shaStepDownY = 0;
|
|
break;
|
|
}
|
|
|
|
while (nbox--)
|
|
{
|
|
box_x1 = pbox->x1;
|
|
box_y1 = pbox->y1;
|
|
box_x2 = pbox->x2;
|
|
box_y2 = pbox->y2;
|
|
pbox++;
|
|
|
|
/*
|
|
* Compute screen and shadow locations for this box
|
|
*/
|
|
switch (x_dir) {
|
|
case LEFT_TO_RIGHT:
|
|
scr_x1 = box_x1 & pixelsMask;
|
|
scr_x2 = (box_x2 + pixelsPerBits - 1) & pixelsMask;
|
|
|
|
sha_x1 = scr_x1;
|
|
break;
|
|
case TOP_TO_BOTTOM:
|
|
scr_x1 = box_y1 & pixelsMask;
|
|
scr_x2 = (box_y2 + pixelsPerBits - 1) & pixelsMask;
|
|
|
|
sha_y1 = scr_x1;
|
|
break;
|
|
case RIGHT_TO_LEFT:
|
|
scr_x1 = (shaWidth - box_x2) & pixelsMask;
|
|
scr_x2 = (shaWidth - box_x1 + pixelsPerBits - 1) & pixelsMask;
|
|
|
|
sha_x1 = (shaWidth - scr_x1 - 1);
|
|
break;
|
|
case BOTTOM_TO_TOP:
|
|
scr_x1 = (shaHeight - box_y2) & pixelsMask;
|
|
scr_x2 = (shaHeight - box_y1 + pixelsPerBits - 1) & pixelsMask;
|
|
|
|
sha_y1 = (shaHeight - scr_x1 - 1);
|
|
break;
|
|
}
|
|
switch (y_dir) {
|
|
case TOP_TO_BOTTOM:
|
|
scr_y1 = box_y1;
|
|
scr_y2 = box_y2;
|
|
|
|
sha_y1 = scr_y1;
|
|
break;
|
|
case RIGHT_TO_LEFT:
|
|
scr_y1 = (shaWidth - box_x2);
|
|
scr_y2 = (shaWidth - box_x1);
|
|
|
|
sha_x1 = box_x2 - 1;
|
|
break;
|
|
case BOTTOM_TO_TOP:
|
|
scr_y1 = shaHeight - box_y2;
|
|
scr_y2 = shaHeight - box_y1;
|
|
|
|
sha_y1 = box_y2 - 1;
|
|
break;
|
|
case LEFT_TO_RIGHT:
|
|
scr_y1 = box_x1;
|
|
scr_y2 = box_x2;
|
|
|
|
sha_x1 = box_x1;
|
|
break;
|
|
}
|
|
scr_w = ((scr_x2 - scr_x1) * shaBpp) >> FB_SHIFT;
|
|
scr_h = scr_y2 - scr_y1;
|
|
scr_y = scr_y1;
|
|
|
|
/* shift amount for first pixel on screen */
|
|
shaFirstShift = FB_UNIT - ((sha_x1 * shaBpp) & FB_MASK) - shaBpp;
|
|
|
|
/* pointer to shadow data first placed on screen */
|
|
shaLine = (shaBits +
|
|
sha_y1 * shaStride +
|
|
((sha_x1 * shaBpp) >> FB_SHIFT));
|
|
|
|
/*
|
|
* Copy the bits, always write across the physical frame buffer
|
|
* to take advantage of write combining.
|
|
*/
|
|
while (scr_h--)
|
|
{
|
|
int p;
|
|
FbBits bits;
|
|
FbBits *win;
|
|
int i;
|
|
CARD32 winSize;
|
|
|
|
sha = shaLine;
|
|
shaShift = shaFirstShift;
|
|
w = scr_w;
|
|
scr_x = scr_x1 * shaBpp >> FB_SHIFT;
|
|
|
|
while (w)
|
|
{
|
|
/*
|
|
* Map some of this line
|
|
*/
|
|
win = (FbBits *) (*pBuf->window) (pScreen,
|
|
scr_y,
|
|
scr_x << 2,
|
|
SHADOW_WINDOW_WRITE,
|
|
&winSize,
|
|
pBuf->closure);
|
|
i = (winSize >> 2);
|
|
if (i > w)
|
|
i = w;
|
|
w -= i;
|
|
scr_x += i;
|
|
/*
|
|
* Copy the portion of the line mapped
|
|
*/
|
|
while (i--)
|
|
{
|
|
bits = 0;
|
|
p = pixelsPerBits;
|
|
/*
|
|
* Build one word of output from multiple inputs
|
|
*
|
|
* Note that for 90/270 rotations, this will walk
|
|
* down the shadow hitting each scanline once.
|
|
* This is probably not very efficient.
|
|
*/
|
|
while (p--)
|
|
{
|
|
bits = FbScrLeft(bits, shaBpp);
|
|
bits |= FbScrRight (*sha, shaShift) & shaMask;
|
|
|
|
shaShift -= shaStepOverX;
|
|
if (shaShift >= FB_UNIT)
|
|
{
|
|
shaShift -= FB_UNIT;
|
|
sha--;
|
|
}
|
|
else if (shaShift < 0)
|
|
{
|
|
shaShift += FB_UNIT;
|
|
sha++;
|
|
}
|
|
sha += shaStepOverY;
|
|
}
|
|
*win++ = bits;
|
|
}
|
|
}
|
|
scr_y++;
|
|
shaFirstShift -= shaStepDownX;
|
|
if (shaFirstShift >= FB_UNIT)
|
|
{
|
|
shaFirstShift -= FB_UNIT;
|
|
shaLine--;
|
|
}
|
|
else if (shaFirstShift < 0)
|
|
{
|
|
shaFirstShift += FB_UNIT;
|
|
shaLine++;
|
|
}
|
|
shaLine += shaStepDownY;
|
|
}
|
|
}
|
|
}
|