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(!1654) Xnest: Pixmap: replace XGetImage() by xcb_get_image() 

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2024-08-08 15:35:16 +02:00
parent 2d3a61945c
commit b38bd025d3
1 changed files with 37 additions and 7 deletions
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44
hw/xnest/Pixmap.c
View File

@ -101,30 +101,60 @@ xnestModifyPixmapHeader(PixmapPtr pPixmap, int width, int height, int depth,
RegionPtr
xnestPixmapToRegion(PixmapPtr pPixmap)
{
XImage *ximage;
register RegionPtr pReg, pTmpReg;
register int x, y;
unsigned long previousPixel, currentPixel;
BoxRec Box = { 0, 0, 0, 0 };
Bool overlap;
ximage = XGetImage(xnestDisplay, xnestPixmap(pPixmap), 0, 0,
pPixmap->drawable.width, pPixmap->drawable.height,
1, XYPixmap);
if (pPixmap->drawable.depth != 1) {
LogMessage(X_WARNING, "xnestPixmapToRegion() depth != 1: %d\n", pPixmap->drawable.depth);
return NULL;
}
xcb_generic_error_t *err = NULL;
xcb_get_image_reply_t *reply = xcb_get_image_reply(
xnestUpstreamInfo.conn,
xcb_get_image(
xnestUpstreamInfo.conn,
XCB_IMAGE_FORMAT_XY_PIXMAP,
xnestPixmap(pPixmap),
0,
0,
pPixmap->drawable.width,
pPixmap->drawable.height,
~0),
&err);
if (err) {
// badMatch may happeen if the upstream window is currently minimized
if (err->error_code != BadMatch)
ErrorF("xnestGetImage: received error %d\n", err->error_code);
free(err);
return NULL;
}
if (!reply) {
ErrorF("xnestGetImage: received no reply\n");
return NULL;
}
pReg = RegionCreate(NULL, 1);
pTmpReg = RegionCreate(NULL, 1);
if (!pReg || !pTmpReg) {
XDestroyImage(ximage);
free(reply);
return NullRegion;
}
uint8_t *image_data = xcb_get_image_data(reply);
for (y = 0; y < pPixmap->drawable.height; y++) {
Box.y1 = y;
Box.y2 = y + 1;
previousPixel = 0L;
const int line_start = BitmapBytePad(pPixmap->drawable.width) * y;
for (x = 0; x < pPixmap->drawable.width; x++) {
currentPixel = XGetPixel(ximage, x, y);
currentPixel = ((image_data[line_start + (x/8)]) >> (x % 8)) & 1;
if (previousPixel != currentPixel) {
if (previousPixel == 0L) {
/* left edge */
@ -148,7 +178,7 @@ xnestPixmapToRegion(PixmapPtr pPixmap)
}
RegionDestroy(pTmpReg);
XDestroyImage(ximage);
free(reply);
RegionValidate(pReg, &overlap);