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tdenetwork/krdc/vnc/desktop.c

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/*
* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
* Copyright (C) 2002 Tim Jansen. All Rights Reserved.
* Copyright (C) 1999-2001 Anders Lindstr<74>m
*
*
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* tim@tjansen.de: - removed stuff for krdc
* - merged with shm.c and misc.c
* - added FillRectangle and Sync methods to draw only on
* the image
* - added Zoom functionality, based on rotation funcs from
* SGE by Anders Lindstr<74>m)
* - added support for softcursor encoding
*
*/
/*
* desktop.c - functions to deal with "desktop" window.
*/
#include <X11/Xlib.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#include <math.h>
#include <limits.h>
#include "vncviewer.h"
static XShmSegmentInfo shminfo;
static Bool caughtShmError = False;
static Bool needShmCleanup = False;
static XShmSegmentInfo zoomshminfo;
static Bool caughtZoomShmError = False;
static Bool needZoomShmCleanup = False;
static Bool gcInited = False;
GC gc;
GC srcGC, dstGC; /* used for debugging copyrect */
Dimension dpyWidth, dpyHeight;
static XImage *image = NULL;
Bool useShm = True;
static Bool zoomActive = False;
static int zoomWidth, zoomHeight;
static XImage *zoomImage = NULL;
static Bool useZoomShm = True;
/* for softcursor */
static char *savedArea = NULL;
typedef enum {
SOFTCURSOR_UNDER,
SOFTCURSOR_PART_UNDER,
SOFTCURSOR_UNAFFECTED
} SoftCursorState;
typedef int Sint32;
typedef short Sint16;
typedef char Sint8;
typedef unsigned int Uint32;
typedef unsigned short Uint16;
typedef unsigned char Uint8;
typedef struct {
int w, h;
unsigned int pitch;
void *pixels;
int BytesPerPixel;
} Surface;
typedef struct {
Sint16 x, y;
Uint16 w, h;
} Rect;
static void bgr233cpy(CARD8 *dst, CARD8 *src, int len);
static void CopyDataToScreenRaw(char *buf, int x, int y, int width, int height);
static void CopyBGR233ToScreen(CARD8 *buf, int x, int y, int width,int height);
static void FillRectangleBGR233(CARD8 buf, int x, int y, int width,int height);
static int CheckRectangle(int x, int y, int width, int height);
static SoftCursorState getSoftCursorState(int x, int y, int width, int height);
static void discardCursorSavedArea(void);
static void saveCursorSavedArea(void);
static void ZoomInit(void);
static void transformZoomSrc(int six, int siy, int siw, int sih,
int *dix, int *diy, int *diw, int *dih,
int srcW, int dstW, int srcH, int dstH);
static void transformZoomDst(int *six, int *siy, int *siw, int *sih,
int dix, int diy, int diw, int dih,
int srcW, int dstW, int srcH, int dstH);
static void ZoomSurfaceSrcCoords(int x, int y, int w, int h,
int *dix, int *diy, int *diw, int *dih,
Surface * src, Surface * dst);
static void ZoomSurfaceCoords32(int sx, int sy, int sw, int sh,
int dx, int dy, Surface * src, Surface * dst);
static void sge_transform(Surface *src, Surface *dst, float xscale, float yscale,
Uint16 qx, Uint16 qy);
void
DesktopInit(Window win)
{
XGCValues gcv;
image = CreateShmImage();
if (!image) {
useShm = False;
image = XCreateImage(dpy, vis, visdepth, ZPixmap, 0, NULL,
si.framebufferWidth, si.framebufferHeight,
BitmapPad(dpy), 0);
image->data = calloc(image->bytes_per_line * image->height, 1);
if (!image->data) {
fprintf(stderr,"malloc failed\n");
exit(1);
}
}
gc = XCreateGC(dpy,win,0,NULL);
gcv.function = GXxor;
gcv.foreground = 0x0f0f0f0f;
srcGC = XCreateGC(dpy,win,GCFunction|GCForeground,&gcv);
gcv.foreground = 0xf0f0f0f0;
dstGC = XCreateGC(dpy,win,GCFunction|GCForeground,&gcv);
gcInited = True;
}
/*
* DrawScreenRegionX11Thread
* Never call from any other desktop.c function, only for X11 thread
*/
void
DrawScreenRegionX11Thread(Window win, int x, int y, int width, int height) {
zoomActive = False;
zoomWidth = 0;
zoomHeight = 0;
if (!image)
return;
if (useShm)
XShmPutImage(dpy, win, gc, image, x, y, x, y, width, height, False);
else
XPutImage(dpy, win, gc, image, x, y, x, y, width, height);
}
/*
* CheckRectangle
*/
static int CheckRectangle(int x, int y, int width, int height) {
if ((x < 0) || (y < 0))
return 0;
if (((x+width) > si.framebufferWidth) || ((y+height) > si.framebufferHeight))
return 0;
return 1;
}
static
void bgr233cpy(CARD8 *dst, CARD8 *src, int len) {
int i;
CARD16 *d16;
CARD32 *d32;
switch (visbpp) {
case 8:
for (i = 0; i < len; i++)
*(dst++) = (CARD8) BGR233ToPixel[*(src++)];
break;
case 16:
d16 = (CARD16*) dst;
for (i = 0; i < len; i++)
*(d16++) = (CARD16) BGR233ToPixel[*(src++)];
break;
case 32:
d32 = (CARD32*) dst;
for (i = 0; i < len; i++)
*(d32++) = (CARD32) BGR233ToPixel[*(src++)];
break;
default:
fprintf(stderr, "Unsupported softcursor depth %d\n", visbpp);
}
}
/*
* CopyDataToScreen.
*/
void
CopyDataToScreen(char *buf, int x, int y, int width, int height)
{
SoftCursorState s;
if (!CheckRectangle(x, y, width, height))
return;
LockFramebuffer();
s = getSoftCursorState(x, y, width, height);
if (s == SOFTCURSOR_PART_UNDER)
undrawCursor();
if (!appData.useBGR233)
CopyDataToScreenRaw(buf, x, y, width, height);
else
CopyBGR233ToScreen((CARD8 *)buf, x, y, width, height);
if (s != SOFTCURSOR_UNAFFECTED)
drawCursor();
UnlockFramebuffer();
SyncScreenRegion(x, y, width, height);
}
/*
* CopyDataToScreenRaw.
*/
static void
CopyDataToScreenRaw(char *buf, int x, int y, int width, int height)
{
int h;
int widthInBytes = width * visbpp / 8;
int scrWidthInBytes = image->bytes_per_line;
char *scr = (image->data + y * scrWidthInBytes
+ x * visbpp / 8);
for (h = 0; h < height; h++) {
memcpy(scr, buf, widthInBytes);
buf += widthInBytes;
scr += scrWidthInBytes;
}
}
/*
* CopyBGR233ToScreen.
*/
static void
CopyBGR233ToScreen(CARD8 *buf, int x, int y, int width, int height)
{
int p, q;
int xoff = 7 - (x & 7);
int xcur;
int fbwb = si.framebufferWidth / 8;
CARD8 *scr1 = ((CARD8 *)image->data) + y * fbwb + x / 8;
CARD8 *scrt;
CARD8 *scr8 = ((CARD8 *)image->data) + y * si.framebufferWidth + x;
CARD16 *scr16 = ((CARD16 *)image->data) + y * si.framebufferWidth + x;
CARD32 *scr32 = ((CARD32 *)image->data) + y * si.framebufferWidth + x;
switch (visbpp) {
/* thanks to Chris Hooper for single bpp support */
case 1:
for (q = 0; q < height; q++) {
xcur = xoff;
scrt = scr1;
for (p = 0; p < width; p++) {
*scrt = ((*scrt & ~(1 << xcur))
| (BGR233ToPixel[*(buf++)] << xcur));
if (xcur-- == 0) {
xcur = 7;
scrt++;
}
}
scr1 += fbwb;
}
break;
case 8:
for (q = 0; q < height; q++) {
for (p = 0; p < width; p++) {
*(scr8++) = BGR233ToPixel[*(buf++)];
}
scr8 += si.framebufferWidth - width;
}
break;
case 16:
for (q = 0; q < height; q++) {
for (p = 0; p < width; p++) {
*(scr16++) = BGR233ToPixel[*(buf++)];
}
scr16 += si.framebufferWidth - width;
}
break;
case 32:
for (q = 0; q < height; q++) {
for (p = 0; p < width; p++) {
*(scr32++) = BGR233ToPixel[*(buf++)];
}
scr32 += si.framebufferWidth - width;
}
break;
}
}
/*
* FillRectangle8.
*/
void
FillRectangle8(CARD8 fg, int x, int y, int width, int height)
{
SoftCursorState s;
if (!CheckRectangle(x, y, width, height))
return;
s = getSoftCursorState(x, y, width, height);
if (s == SOFTCURSOR_PART_UNDER)
undrawCursor();
if (!appData.useBGR233) {
int h;
int widthInBytes = width * visbpp / 8;
int scrWidthInBytes = image->bytes_per_line;
char *scr = (image->data + y * scrWidthInBytes
+ x * visbpp / 8);
for (h = 0; h < height; h++) {
memset(scr, fg, widthInBytes);
scr += scrWidthInBytes;
}
} else {
FillRectangleBGR233(fg, x, y, width, height);
}
if (s != SOFTCURSOR_UNAFFECTED)
drawCursor();
}
/*
* FillRectangleBGR233.
*/
static void
FillRectangleBGR233(CARD8 fg, int x, int y, int width, int height)
{
int p, q;
int xoff = 7 - (x & 7);
int xcur;
int fbwb = si.framebufferWidth / 8;
CARD8 *scr1 = ((CARD8 *)image->data) + y * fbwb + x / 8;
CARD8 *scrt;
CARD8 *scr8 = ((CARD8 *)image->data) + y * si.framebufferWidth + x;
CARD16 *scr16 = ((CARD16 *)image->data) + y * si.framebufferWidth + x;
CARD32 *scr32 = ((CARD32 *)image->data) + y * si.framebufferWidth + x;
unsigned long fg233 = BGR233ToPixel[fg];
switch (visbpp) {
/* thanks to Chris Hooper for single bpp support */
case 1:
for (q = 0; q < height; q++) {
xcur = xoff;
scrt = scr1;
for (p = 0; p < width; p++) {
*scrt = ((*scrt & ~(1 << xcur))
| (fg233 << xcur));
if (xcur-- == 0) {
xcur = 7;
scrt++;
}
}
scr1 += fbwb;
}
break;
case 8:
for (q = 0; q < height; q++) {
for (p = 0; p < width; p++) {
*(scr8++) = fg233;
}
scr8 += si.framebufferWidth - width;
}
break;
case 16:
for (q = 0; q < height; q++) {
for (p = 0; p < width; p++) {
*(scr16++) = fg233;
}
scr16 += si.framebufferWidth - width;
}
break;
case 32:
for (q = 0; q < height; q++) {
for (p = 0; p < width; p++) {
*(scr32++) = fg233;
}
scr32 += si.framebufferWidth - width;
}
break;
}
}
/*
* FillRectangle16
*/
void
FillRectangle16(CARD16 fg, int x, int y, int width, int height)
{
int i, h;
int scrWidthInBytes = image->bytes_per_line;
char *scr = (image->data + y * scrWidthInBytes
+ x * visbpp / 8);
CARD16 *scr16;
SoftCursorState s;
if (!CheckRectangle(x, y, width, height))
return;
s = getSoftCursorState(x, y, width, height);
if (s == SOFTCURSOR_PART_UNDER)
undrawCursor();
for (h = 0; h < height; h++) {
scr16 = (CARD16*) scr;
for (i = 0; i < width; i++)
scr16[i] = fg;
scr += scrWidthInBytes;
}
if (s != SOFTCURSOR_UNAFFECTED)
drawCursor();
}
/*
* FillRectangle32
*/
void
FillRectangle32(CARD32 fg, int x, int y, int width, int height)
{
int i, h;
int scrWidthInBytes = image->bytes_per_line;
SoftCursorState s;
char *scr = (image->data + y * scrWidthInBytes
+ x * visbpp / 8);
CARD32 *scr32;
if (!CheckRectangle(x, y, width, height))
return;
s = getSoftCursorState(x, y, width, height);
if (s == SOFTCURSOR_PART_UNDER)
undrawCursor();
for (h = 0; h < height; h++) {
scr32 = (CARD32*) scr;
for (i = 0; i < width; i++)
scr32[i] = fg;
scr += scrWidthInBytes;
}
if (s != SOFTCURSOR_UNAFFECTED)
drawCursor();
}
/*
* CopyDataFromScreen.
*/
void
CopyDataFromScreen(char *buf, int x, int y, int width, int height)
{
int widthInBytes = width * visbpp / 8;
int scrWidthInBytes = image->bytes_per_line;
char *src = (image->data + y * scrWidthInBytes
+ x * visbpp / 8);
int h;
if (!CheckRectangle(x, y, width, height))
return;
for (h = 0; h < height; h++) {
memcpy(buf, src, widthInBytes);
src += scrWidthInBytes;
buf += widthInBytes;
}
}
/*
* CopyArea
*/
void
CopyArea(int srcX, int srcY, int width, int height, int x, int y)
{
int widthInBytes = width * visbpp / 8;
SoftCursorState sSrc, sDst;
LockFramebuffer();
sSrc = getSoftCursorState(srcX, srcY, width, height);
sDst = getSoftCursorState(x, y, width, height);
if ((sSrc != SOFTCURSOR_UNAFFECTED) ||
(sDst == SOFTCURSOR_PART_UNDER))
undrawCursor();
if ((srcY+height < y) || (y+height < srcY) ||
(srcX+width < x) || (x+width < srcX)) {
int scrWidthInBytes = image->bytes_per_line;
char *src = (image->data + srcY * scrWidthInBytes
+ srcX * visbpp / 8);
char *dst = (image->data + y * scrWidthInBytes
+ x * visbpp / 8);
int h;
if (!CheckRectangle(srcX, srcY, width, height)) {
UnlockFramebuffer();
return;
}
if (!CheckRectangle(x, y, width, height)) {
UnlockFramebuffer();
return;
}
for (h = 0; h < height; h++) {
memcpy(dst, src, widthInBytes);
src += scrWidthInBytes;
dst += scrWidthInBytes;
}
}
else {
char *buf = malloc(widthInBytes*height);
if (!buf) {
UnlockFramebuffer();
fprintf(stderr, "Out of memory, CopyArea impossible\n");
return;
}
CopyDataFromScreen(buf, srcX, srcY, width, height);
CopyDataToScreenRaw(buf, x, y, width, height);
free(buf);
}
if ((sSrc != SOFTCURSOR_UNAFFECTED) ||
(sDst != SOFTCURSOR_UNAFFECTED))
drawCursor();
UnlockFramebuffer();
SyncScreenRegion(x, y, width, height);
}
void SyncScreenRegion(int x, int y, int width, int height) {
int dx, dy, dw, dh;
if (zoomActive) {
Surface src, dest;
src.w = si.framebufferWidth;
src.h = si.framebufferHeight;
src.pitch = image->bytes_per_line;
src.pixels = image->data;
src.BytesPerPixel = visbpp / 8;
dest.w = zoomWidth;
dest.h = zoomHeight;
dest.pitch = zoomImage->bytes_per_line;
dest.pixels = zoomImage->data;
dest.BytesPerPixel = visbpp / 8;
ZoomSurfaceSrcCoords(x, y, width, height, &dx, &dy, &dw, &dh, &src, &dest);
}
else {
dx = x; dy = y;
dw = width; dh = height;
}
DrawScreenRegion(dx, dy, dw, dh);
}
void SyncScreenRegionX11Thread(int x, int y, int width, int height) {
int dx, dy, dw, dh;
if (zoomActive) {
Surface src, dest;
src.w = si.framebufferWidth;
src.h = si.framebufferHeight;
src.pitch = image->bytes_per_line;
src.pixels = image->data;
src.BytesPerPixel = visbpp / 8;
dest.w = zoomWidth;
dest.h = zoomHeight;
dest.pitch = zoomImage->bytes_per_line;
dest.pixels = zoomImage->data;
dest.BytesPerPixel = visbpp / 8;
ZoomSurfaceSrcCoords(x, y, width, height, &dx, &dy, &dw, &dh, &src, &dest);
}
else {
dx = x; dy = y;
dw = width; dh = height;
}
DrawAnyScreenRegionX11Thread(dx, dy, dw, dh);
}
/*
* ToplevelInitBeforeRealization sets the title, tqgeometry and other resources
* on the toplevel window.
*/
void
ToplevelInit()
{
dpyWidth = WidthOfScreen(DefaultScreenOfDisplay(dpy));
dpyHeight = HeightOfScreen(DefaultScreenOfDisplay(dpy));
}
/*
* Cleanup - perform shm cleanup operations prior to exiting.
*/
void
Cleanup()
{
if (useShm || useZoomShm)
ShmCleanup();
}
void
ShmCleanup()
{
fprintf(stderr,"ShmCleanup called\n");
if (needShmCleanup) {
shmdt(shminfo.shmaddr);
shmctl(shminfo.shmid, IPC_RMID, 0);
needShmCleanup = False;
}
if (needZoomShmCleanup) {
shmdt(zoomshminfo.shmaddr);
shmctl(zoomshminfo.shmid, IPC_RMID, 0);
needZoomShmCleanup = False;
}
}
static int
ShmCreationXErrorHandler(Display *d, XErrorEvent *e)
{
caughtShmError = True;
return 0;
}
XImage *
CreateShmImage()
{
XImage *_image;
XErrorHandler oldXErrorHandler;
if (!XShmQueryExtension(dpy))
return NULL;
_image = XShmCreateImage(dpy, vis, visdepth, ZPixmap, NULL, &shminfo,
si.framebufferWidth, si.framebufferHeight);
if (!_image) return NULL;
shminfo.shmid = shmget(IPC_PRIVATE,
_image->bytes_per_line * _image->height,
IPC_CREAT|0777);
if (shminfo.shmid == -1) {
XDestroyImage(_image);
return NULL;
}
shminfo.shmaddr = _image->data = shmat(shminfo.shmid, 0, 0);
if (shminfo.shmaddr == (char *)-1) {
XDestroyImage(_image);
shmctl(shminfo.shmid, IPC_RMID, 0);
return NULL;
}
shminfo.readOnly = True;
oldXErrorHandler = XSetErrorHandler(ShmCreationXErrorHandler);
XShmAttach(dpy, &shminfo);
XSync(dpy, False);
XSetErrorHandler(oldXErrorHandler);
if (caughtShmError) {
XDestroyImage(_image);
shmdt(shminfo.shmaddr);
shmctl(shminfo.shmid, IPC_RMID, 0);
return NULL;
}
needShmCleanup = True;
fprintf(stderr,"Using shared memory PutImage\n");
return _image;
}
void undrawCursor() {
int x, y, w, h;
if ((imageIndex < 0) || !savedArea)
return;
getBoundingRectCursor(cursorX, cursorY, imageIndex,
&x, &y, &w, &h);
if ((w < 1) || (h < 1))
return;
CopyDataToScreenRaw(savedArea, x, y, w, h);
discardCursorSavedArea();
}
static void drawCursorImage() {
int x, y, w, h, pw, pixelsLeft, processingMask;
int skipLeft, skipRight;
PointerImage *pi = &pointerImages[imageIndex];
CARD8 *img = (CARD8*) pi->image;
CARD8 *imgEnd = &img[pi->len];
CARD8 *fb;
/* check whether the source image has ended (image broken) */
#define CHECK_IMG(x) if (&img[x] > imgEnd) goto imgError
/* check whether the end of the framebuffer has been reached (last line) */
#define CHECK_END() if ((wl == 0) && (h == 1)) return
/* skip x pixels in the source (x must be < pixelsLeft!) */
#define SKIP_IMG(x) if ((x > 0) && !processingMask) { \
CHECK_END(); \
img += pw * x; \
CHECK_IMG(0); \
}
/* skip x pixels in source and destination */
#define SKIP_PIXELS(x) { int wl = x; \
while (pixelsLeft <= wl) { \
wl -= pixelsLeft; \
SKIP_IMG(pixelsLeft); \
CHECK_END(); \
pixelsLeft = *(img++); \
CHECK_IMG(0); \
processingMask = processingMask ? 0 : 1; \
} \
pixelsLeft -= wl; \
SKIP_IMG(wl); \
}
if (!img)
return;
x = cursorX - pi->hotX;
y = cursorY - pi->hotY;
w = pi->w;
h = pi->h;
if (!rectsIntersect(x, y, w, h,
0, 0, si.framebufferWidth, si.framebufferHeight)) {
fprintf(stderr, "intersect abort\n");
return;
}
pw = myFormat.bitsPerPixel / 8;
processingMask = 1;
pixelsLeft = *(img++);
/* at this point everything is initialized for the macros */
/* skip/clip bottom lines */
if ((y+h) > si.framebufferHeight)
h = si.framebufferHeight - y;
/* Skip invisible top lines */
while (y < 0) {
SKIP_PIXELS(w);
y++;
h--;
}
/* calculate left/right clipping */
if (x < 0) {
skipLeft = -x;
w += x;
x = 0;
}
else
skipLeft = 0;
if ((x+w) > si.framebufferWidth) {
skipRight = (x+w) - si.framebufferWidth;
w = si.framebufferWidth - x;
}
else
skipRight = 0;
fb = (CARD8*) image->data + y * image->bytes_per_line + x * visbpp / 8;
/* Paint the thing */
while (h > 0) {
SKIP_PIXELS(skipLeft);
{
CARD8 *fbx = fb;
int wl = w;
while (pixelsLeft <= wl) {
wl -= pixelsLeft;
if ((pixelsLeft > 0) && !processingMask) {
int pl = pw * pixelsLeft;
CHECK_IMG(pl);
if (!appData.useBGR233)
memcpy(fbx, img, pl);
else
bgr233cpy(fbx, img, pixelsLeft);
img += pl;
}
CHECK_END();
fbx += pixelsLeft * visbpp / 8;
pixelsLeft = *(img++);
CHECK_IMG(0);
processingMask = processingMask ? 0 : 1;
}
pixelsLeft -= wl;
if ((wl > 0) && !processingMask) {
int pl = pw * wl;
CHECK_IMG(pl);
if (!appData.useBGR233)
memcpy(fbx, img, pl);
else
bgr233cpy(fbx, img, wl);
img += pl;
}
}
SKIP_PIXELS(skipRight);
fb += image->bytes_per_line;
h--;
}
return;
imgError:
fprintf(stderr, "Error in softcursor image %d\n", imageIndex);
pointerImages[imageIndex].set = 0;
}
static void discardCursorSavedArea() {
if (savedArea)
free(savedArea);
savedArea = 0;
}
static void saveCursorSavedArea() {
int x, y, w, h;
if (imageIndex < 0)
return;
getBoundingRectCursor(cursorX, cursorY, imageIndex,
&x, &y, &w, &h);
if ((w < 1) || (h < 1))
return;
discardCursorSavedArea();
savedArea = malloc(h*image->bytes_per_line);
if (!savedArea) {
fprintf(stderr,"malloc failed, saving cursor not possible\n");
exit(1);
}
CopyDataFromScreen(savedArea, x, y, w, h);
}
void drawCursor() {
saveCursorSavedArea();
drawCursorImage();
}
void getBoundingRectCursor(int cx, int cy, int _imageIndex,
int *x, int *y, int *w, int *h) {
int nx, ny, nw, nh;
if ((_imageIndex < 0) || !pointerImages[_imageIndex].set) {
*x = 0;
*y = 0;
*w = 0;
*h = 0;
return;
}
nx = cx - pointerImages[_imageIndex].hotX;
ny = cy - pointerImages[_imageIndex].hotY;
nw = pointerImages[_imageIndex].w;
nh = pointerImages[_imageIndex].h;
if (nx < 0) {
nw += nx;
nx = 0;
}
if (ny < 0) {
nh += ny;
ny = 0;
}
if ((nx+nw) > si.framebufferWidth)
nw = si.framebufferWidth - nx;
if ((ny+nh) > si.framebufferHeight)
nh = si.framebufferHeight - ny;
if ((nw <= 0) || (nh <= 0)) {
*x = 0;
*y = 0;
*w = 0;
*h = 0;
return;
}
*x = nx;
*y = ny;
*w = nw;
*h = nh;
}
static SoftCursorState getSoftCursorState(int x, int y, int w, int h) {
int cx, cy, cw, ch;
if (imageIndex < 0)
return SOFTCURSOR_UNAFFECTED;
getBoundingRectCursor(cursorX, cursorY, imageIndex,
&cx, &cy, &cw, &ch);
if ((cw == 0) || (ch == 0))
return SOFTCURSOR_UNAFFECTED;
if (!rectsIntersect(x, y, w, h, cx, cy, cw, ch))
return SOFTCURSOR_UNAFFECTED;
if (rectContains(x, y, w, h, cx, cy, cw, ch))
return SOFTCURSOR_UNDER;
else
return SOFTCURSOR_PART_UNDER;
}
int rectsIntersect(int x, int y, int w, int h,
int x2, int y2, int w2, int h2) {
if (x2 >= (x+w))
return 0;
if (y2 >= (y+h))
return 0;
if ((x2+w2) <= x)
return 0;
if ((y2+h2) <= y)
return 0;
return 1;
}
int rectContains(int outX, int outY, int outW, int outH,
int inX, int inY, int inW, int inH) {
if (inX < outX)
return 0;
if (inY < outY)
return 0;
if ((inX+inW) > (outX+outW))
return 0;
if ((inY+inH) > (outY+outH))
return 0;
return 1;
}
void rectsJoin(int *nx1, int *ny1, int *nw1, int *nh1,
int x2, int y2, int w2, int h2) {
int ox, oy, ow, oh;
ox = *nx1;
oy = *ny1;
ow = *nw1;
oh = *nh1;
if (x2 < ox) {
ow += ox - x2;
ox = x2;
}
if (y2 < oy) {
oh += oy - y2;
oy = y2;
}
if ((x2+w2) > (ox+ow))
ow = (x2+w2) - ox;
if ((y2+h2) > (oy+oh))
oh = (y2+h2) - oy;
*nx1 = ox;
*ny1 = oy;
*nw1 = ow;
*nh1 = oh;
}
XImage *
CreateShmZoomImage()
{
XImage *_image;
XErrorHandler oldXErrorHandler;
if (!XShmQueryExtension(dpy))
return NULL;
_image = XShmCreateImage(dpy, vis, visdepth, ZPixmap, NULL, &zoomshminfo,
si.framebufferWidth, si.framebufferHeight);
if (!_image) return NULL;
zoomshminfo.shmid = shmget(IPC_PRIVATE,
_image->bytes_per_line * _image->height,
IPC_CREAT|0777);
if (zoomshminfo.shmid == -1) {
XDestroyImage(_image);
return NULL;
}
zoomshminfo.shmaddr = _image->data = shmat(zoomshminfo.shmid, 0, 0);
if (zoomshminfo.shmaddr == (char *)-1) {
XDestroyImage(_image);
shmctl(zoomshminfo.shmid, IPC_RMID, 0);
return NULL;
}
zoomshminfo.readOnly = True;
oldXErrorHandler = XSetErrorHandler(ShmCreationXErrorHandler);
XShmAttach(dpy, &zoomshminfo);
XSync(dpy, False);
XSetErrorHandler(oldXErrorHandler);
if (caughtZoomShmError) {
XDestroyImage(_image);
shmdt(zoomshminfo.shmaddr);
shmctl(zoomshminfo.shmid, IPC_RMID, 0);
return NULL;
}
needZoomShmCleanup = True;
fprintf(stderr,"Using shared memory PutImage\n");
return _image;
}
/*
* DrawZoomedScreenRegionX11Thread
* Never call from any other desktop.c function, only for X11 thread
*/
void
DrawZoomedScreenRegionX11Thread(Window win, int zwidth, int zheight,
int x, int y, int width, int height) {
if (!image)
return;
if (zwidth > si.framebufferWidth)
zwidth = si.framebufferWidth;
if (zheight > si.framebufferHeight)
zheight = si.framebufferHeight;
if (!zoomActive) {
ZoomInit();
zoomActive = True;
}
if ((zoomWidth != zwidth) || (zoomHeight != zheight)) {
Surface src, dest;
zoomWidth = zwidth;
zoomHeight = zheight;
src.w = si.framebufferWidth;
src.h = si.framebufferHeight;
src.pitch = image->bytes_per_line;
src.pixels = image->data;
src.BytesPerPixel = visbpp / 8;
dest.w = zwidth;
dest.h = zheight;
dest.pitch = zoomImage->bytes_per_line;
dest.pixels = zoomImage->data;
dest.BytesPerPixel = visbpp / 8;
sge_transform(&src, &dest,
(float)dest.w/(float)src.w, (float)dest.h/(float)src.h,
0, 0);
if (useZoomShm)
XShmPutImage(dpy, win, gc, zoomImage, 0, 0, 0, 0, zwidth, zheight, False);
else
XPutImage(dpy, win, gc, zoomImage, 0, 0, 0, 0, zwidth, zheight);
return;
}
if (useZoomShm)
XShmPutImage(dpy, win, gc, zoomImage, x, y, x, y, width, height, False);
else
XPutImage(dpy, win, gc, zoomImage, x, y, x, y, width, height);
}
static void
ZoomInit()
{
if (zoomImage)
return;
zoomImage = CreateShmZoomImage();
if (!zoomImage) {
useZoomShm = False;
zoomImage = XCreateImage(dpy, vis, visdepth, ZPixmap, 0, NULL,
si.framebufferWidth, si.framebufferHeight,
BitmapPad(dpy), 0);
zoomImage->data = calloc(zoomImage->bytes_per_line * zoomImage->height, 1);
if (!zoomImage->data) {
fprintf(stderr,"malloc failed\n");
exit(1);
}
}
}
static void transformZoomSrc(int six, int siy, int siw, int sih,
int *dix, int *diy, int *diw, int *dih,
int srcW, int dstW, int srcH, int dstH) {
double sx, sy, sw, sh;
double dx, dy, dw, dh;
double wq, hq;
sx = six; sy = siy;
sw = siw; sh = sih;
wq = ((double)dstW) / (double) srcW;
hq = ((double)dstH) / (double) srcH;
dx = sx * wq;
dy = sy * hq;
dw = sw * wq;
dh = sh * hq;
*dix = dx;
*diy = dy;
*diw = dw+(dx-(int)dx)+0.5;
*dih = dh+(dy-(int)dy)+0.5;
}
static void transformZoomDst(int *six, int *siy, int *siw, int *sih,
int dix, int diy, int diw, int dih,
int srcW, int dstW, int srcH, int dstH) {
double sx, sy, sw, sh;
double dx, dy, dw, dh;
double wq, hq;
dx = dix; dy = diy;
dw = diw; dh = dih;
wq = ((double)dstW) / (double) srcW;
hq = ((double)dstH) / (double) srcH;
sx = dx / wq;
sy = dy / hq;
sw = dw / wq;
sh = dh / hq;
*six = sx;
*siy = sy;
*siw = sw+(sx-(int)sx)+0.5;
*sih = sh+(sy-(int)sy)+0.5;
}
static void ZoomSurfaceSrcCoords(int six, int siy, int siw, int sih,
int *dix, int *diy, int *diw, int *dih,
Surface * src, Surface * dst)
{
int dx, dy, dw, dh;
int sx, sy, sw, sh;
transformZoomSrc(six, siy, siw, sih,
&dx, &dy, &dw, &dh,
src->w, dst->w, src->h, dst->h);
dx-=2;
dy-=2;
dw+=4;
dh+=4;
if (dx < 0)
dx = 0;
if (dy < 0)
dy = 0;
if (dx+dw > dst->w)
dw = dst->w - dx;
if (dy+dh > dst->h)
dh = dst->h - dy;
transformZoomDst(&sx, &sy, &sw, &sh,
dx, dy, dw, dh,
src->w, dst->w, src->h, dst->h);
if (sx+sw > src->w)
sw = src->w - sx;
if (sy+sh > src->h)
sh = src->h - sy;
ZoomSurfaceCoords32(sx, sy, sw, sh, dx, dy, src, dst);
*dix = dx;
*diy = dy;
*diw = dw;
*dih = dh;
}
static void ZoomSurfaceCoords32(int sx, int sy, int sw, int sh,
int dx, int dy,
Surface * src, Surface * dst)
{
Surface s2;
s2 = *src;
s2.pixels = ((char*)s2.pixels) + (sx * s2.BytesPerPixel) + (sy * src->pitch);
s2.w = sw;
s2.h = sh;
sge_transform(&s2, dst,
(float)dst->w/(float)src->w, (float)dst->h/(float)src->h,
dx, dy);
}
#define sge_clip_xmin(pnt) 0
#define sge_clip_xmax(pnt) pnt->w
#define sge_clip_ymin(pnt) 0
#define sge_clip_ymax(pnt) pnt->h
/*==================================================================================
// Helper function to sge_transform()
// Returns the bounding box
//==================================================================================
*/
static void _calcRect(Surface *src, Surface *dst, float xscale, float yscale,
Uint16 qx, Uint16 qy,
Sint16 *xmin, Sint16 *ymin, Sint16 *xmax, Sint16 *ymax)
{
Sint16 x, y, rx, ry;
int i;
/* Clip to src surface */
Sint16 sxmin = sge_clip_xmin(src);
Sint16 sxmax = sge_clip_xmax(src);
Sint16 symin = sge_clip_ymin(src);
Sint16 symax = sge_clip_ymax(src);
Sint16 sx[5];
Sint16 sy[4];
/* We don't really need fixed-point here
* but why not? */
Sint32 ictx = (Sint32) (xscale * 8192.0);
Sint32 icty = (Sint32) (yscale * 8192.0);
sx[0] = sxmin;
sx[1] = sxmax;
sx[2] = sxmin;
sx[3] = sxmax;
sy[0] = symin;
sy[1] = symax;
sy[2] = symax;
sy[3] = symin;
/* Calculate the four corner points */
for(i=0; i<4; i++){
rx = sx[i];
ry = sy[i];
x = (Sint16)(((ictx*rx) >> 13) + qx);
y = (Sint16)(((icty*ry) >> 13) + qy);
if(i==0){
*xmax = *xmin = x;
*ymax = *ymin = y;
}else{
if(x>*xmax)
*xmax=x;
else if(x<*xmin)
*xmin=x;
if(y>*ymax)
*ymax=y;
else if(y<*ymin)
*ymin=y;
}
}
/* Better safe than sorry...*/
*xmin -= 1;
*ymin -= 1;
*xmax += 1;
*ymax += 1;
/* Clip to dst surface */
if( !dst )
return;
if( *xmin < sge_clip_xmin(dst) )
*xmin = sge_clip_xmin(dst);
if( *xmax > sge_clip_xmax(dst) )
*xmax = sge_clip_xmax(dst);
if( *ymin < sge_clip_ymin(dst) )
*ymin = sge_clip_ymin(dst);
if( *ymax > sge_clip_ymax(dst) )
*ymax = sge_clip_ymax(dst);
}
/*==================================================================================
** Scale by scale and place at position (qx,qy).
**
**
** Developed with the help from Terry Hancock (hancock@earthlink.net)
**
**==================================================================================*/
/* First we need some macros to handle different bpp
* I'm sorry about this...
*/
#define TRANSFORM(UintXX, DIV) \
Sint32 src_pitch=src->pitch/DIV; \
Sint32 dst_pitch=dst->pitch/DIV; \
UintXX *src_row = (UintXX *)src->pixels; \
UintXX *dst_row; \
\
for (y=ymin; y<ymax; y++){ \
dy = y - qy; \
\
sx = (Sint32)ctdx; /* Compute source anchor points */ \
sy = (Sint32)(cty*dy); \
\
/* Calculate pointer to dst surface */ \
dst_row = (UintXX *)dst->pixels + y*dst_pitch; \
\
for (x=xmin; x<xmax; x++){ \
rx=(Sint16)(sx >> 13); /* Convert from fixed-point */ \
ry=(Sint16)(sy >> 13); \
\
/* Make sure the source pixel is actually in the source image. */ \
if( (rx>=sxmin) && (rx<sxmax) && (ry>=symin) && (ry<symax) ) \
*(dst_row + x) = *(src_row + ry*src_pitch + rx); \
\
sx += ctx; /* Incremental transformations */ \
} \
}
/* Interpolated transform */
#define TRANSFORM_AA(UintXX, DIV) \
Sint32 src_pitch=src->pitch/DIV; \
Sint32 dst_pitch=dst->pitch/DIV; \
UintXX *src_row = (UintXX *)src->pixels; \
UintXX *dst_row; \
UintXX c1, c2, c3, c4;\
Uint32 R, G, B, A=0; \
UintXX Rtqmask = image->red_mask;\
UintXX Gtqmask = image->green_mask;\
UintXX Btqmask = image->blue_mask;\
UintXX Atqmask = 0;\
Uint32 wx, wy;\
Uint32 p1, p2, p3, p4;\
\
/*
* Interpolation:
* We calculate the distances from our point to the four nearest pixels, d1..d4.
* d(a,b) = sqrt(a<>+b<>) ~= 0.707(a+b) (Pythagoras (Taylor) expanded around (0.5;0.5))
*
* 1 wx 2
* *-|-* (+ = our point at (x,y))
* | | | (* = the four nearest pixels)
* wy --+ | wx = float(x) - int(x)
* | | wy = float(y) - int(y)
* *---*
* 3 4
* d1 = d(wx,wy) d2 = d(1-wx,wy) d3 = d(wx,1-wy) d4 = d(1-wx,1-wy)
* We now want to weight each pixels importance - it's vicinity to our point:
* w1=d4 w2=d3 w3=d2 w4=d1 (Yes it works... just think a bit about it)
*
* If the pixels have the colors c1..c4 then our point should have the color
* c = (w1*c1 + w2*c2 + w3*c3 + w4*c4)/(w1+w2+w3+w4) (the weighted average)
* but w1+w2+w3+w4 = 4*0.707 so we might as well write it as
* c = p1*c1 + p2*c2 + p3*c3 + p4*c4 where p1..p4 = (w1..w4)/(4*0.707)
*
* But p1..p4 are fixed point so we can just divide the fixed point constant!
* 8192/(4*0.71) = 2897 and we can skip 0.71 too (the division will cancel it everywhere)
* 8192/4 = 2048
*
* 020102: I changed the fixed-point representation for the variables in the weighted average
* to 24.7 to avoid problems with 32bit colors. Everything else is still 18.13. This
* does however not solve the problem with 32bit RGBA colors...
*/\
\
Sint32 one = 2048>>6; /* 1 in Fixed-point */ \
Sint32 two = 2*2048>>6; /* 2 in Fixed-point */ \
\
for (y=ymin; y<ymax; y++){ \
dy = y - qy; \
\
sx = (Sint32)(ctdx); /* Compute source anchor points */ \
sy = (Sint32)(cty*dy); \
\
/* Calculate pointer to dst surface */ \
dst_row = (UintXX *)dst->pixels + y*dst_pitch; \
\
for (x=xmin; x<xmax; x++){ \
rx=(Sint16)(sx >> 13); /* Convert from fixed-point */ \
ry=(Sint16)(sy >> 13); \
\
/* Make sure the source pixel is actually in the source image. */ \
if( (rx>=sxmin) && (rx+1<sxmax) && (ry>=symin) && (ry+1<symax) ){ \
wx = (sx & 0x00001FFF) >>8; /* (float(x) - int(x)) / 4 */ \
wy = (sy & 0x00001FFF) >>8;\
\
p4 = wx+wy;\
p3 = one-wx+wy;\
p2 = wx+one-wy;\
p1 = two-wx-wy;\
\
c1 = *(src_row + ry*src_pitch + rx);\
c2 = *(src_row + ry*src_pitch + rx+1);\
c3 = *(src_row + (ry+1)*src_pitch + rx);\
c4 = *(src_row + (ry+1)*src_pitch + rx+1);\
\
/* Calculate the average */\
R = ((p1*(c1 & Rtqmask) + p2*(c2 & Rtqmask) + p3*(c3 & Rtqmask) + p4*(c4 & Rtqmask))>>7) & Rtqmask;\
G = ((p1*(c1 & Gtqmask) + p2*(c2 & Gtqmask) + p3*(c3 & Gtqmask) + p4*(c4 & Gtqmask))>>7) & Gtqmask;\
B = ((p1*(c1 & Btqmask) + p2*(c2 & Btqmask) + p3*(c3 & Btqmask) + p4*(c4 & Btqmask))>>7) & Btqmask;\
if(Atqmask)\
A = ((p1*(c1 & Atqmask) + p2*(c2 & Atqmask) + p3*(c3 & Atqmask) + p4*(c4 & Atqmask))>>7) & Atqmask;\
\
*(dst_row + x) = R | G | B | A;\
} \
sx += ctx; /* Incremental transformations */ \
} \
}
void sge_transform(Surface *src, Surface *dst, float xscale, float yscale, Uint16 qx, Uint16 qy)
{
Sint32 dy, sx, sy;
Sint16 x, y, rx, ry;
Rect r;
Sint32 ctx, cty;
Sint16 xmin, xmax, ymin, ymax;
Sint16 sxmin, sxmax, symin, symax;
Sint32 dx, ctdx;
/* Here we use 18.13 fixed point integer math
// Sint32 should have 31 usable bits and one for sign
// 2^13 = 8192
*/
/* Check scales */
Sint32 maxint = (Sint32)(pow(2, sizeof(Sint32)*8 - 1 - 13)); /* 2^(31-13) */
r.x = r.y = r.w = r.h = 0;
if( xscale == 0 || yscale == 0)
return;
if( 8192.0/xscale > maxint )
xscale = (float)(8192.0/maxint);
else if( 8192.0/xscale < -maxint )
xscale = (float)(-8192.0/maxint);
if( 8192.0/yscale > maxint )
yscale = (float)(8192.0/maxint);
else if( 8192.0/yscale < -maxint )
yscale = (float)(-8192.0/maxint);
/* Fixed-point equivalents */
ctx = (Sint32)(8192.0/xscale);
cty = (Sint32)(8192.0/yscale);
/* Compute a bounding rectangle */
xmin=0; xmax=dst->w; ymin=0; ymax=dst->h;
_calcRect(src, dst, xscale, yscale,
qx, qy, &xmin, &ymin, &xmax, &ymax);
/* Clip to src surface */
sxmin = sge_clip_xmin(src);
sxmax = sge_clip_xmax(src);
symin = sge_clip_ymin(src);
symax = sge_clip_ymax(src);
/* Some terms in the transform are constant */
dx = xmin - qx;
ctdx = ctx*dx;
/* Use the correct bpp */
if( src->BytesPerPixel == dst->BytesPerPixel){
switch( src->BytesPerPixel ){
case 1: { /* Assuming 8-bpp */
TRANSFORM(Uint8, 1)
}
break;
case 2: { /* Probably 15-bpp or 16-bpp */
TRANSFORM_AA(Uint16, 2)
}
break;
case 4: { /* Probably 32-bpp */
TRANSFORM_AA(Uint32, 4)
}
break;
}
}
}
void freeDesktopResources() {
Cleanup();
if (image) {
XDestroyImage(image);
}
if (zoomImage) {
XDestroyImage(zoomImage);
}
if (savedArea)
free(savedArea);
if (gcInited) {
XFreeGC(dpy, gc);
XFreeGC(dpy, srcGC);
XFreeGC(dpy, dstGC);
}
caughtShmError = False;
needShmCleanup = False;
caughtZoomShmError = False;
needZoomShmCleanup = False;
gcInited = False;
image = NULL;
useShm = True;
zoomActive = False;
zoomImage = NULL;
useZoomShm = True;
savedArea = NULL;
}
/*
* ColorRectangle32
* Only used for debugging / visualizing output
*/
/*
static void
ColorRectangle32(XImage *img, CARD32 fg, int x, int y, int width, int height)
{
int i, h;
int scrWidthInBytes = img->bytes_per_line;
char *scr;
CARD32 *scr32;
if ((!img) || (!img->data))
return;
scr = (img->data + y * scrWidthInBytes + x * 4);
if (!CheckRectangle(x, y, width, height))
return;
for (h = 0; h < height; h++) {
scr32 = (CARD32*) scr;
for (i = 0; i < width; i++) {
CARD32 n = 0;
CARD32 p = scr32[i];
if (0xff & fg)
n |= ((( 0xff & p)+( 0xff & fg)) >> 2) & 0xff;
else
n |= (0xff & p);
if (0xff00 & fg)
n |= ((( 0xff00 & p)+( 0xff00 & fg)) >> 2) & 0xff00;
else
n |= (0xff00 & p);
if (0xff0000 & fg)
n |= (((0xff0000 & p)+(0xff0000 & fg)) >> 2) & 0xff0000;
else
n |= (0xff0000 & p);
scr32[i] = n;
}
scr += scrWidthInBytes;
}
}
*/
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