diff options
Diffstat (limited to 'tightvnc-1.3dev5-vncviewer-alpha-cursor.patch')
| -rw-r--r-- | tightvnc-1.3dev5-vncviewer-alpha-cursor.patch | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/tightvnc-1.3dev5-vncviewer-alpha-cursor.patch b/tightvnc-1.3dev5-vncviewer-alpha-cursor.patch new file mode 100644 index 0000000..c9b31e7 --- /dev/null +++ b/tightvnc-1.3dev5-vncviewer-alpha-cursor.patch @@ -0,0 +1,143 @@ +--- vnc_unixsrc.orig/vncviewer/cursor.c 2003-01-15 04:46:52.000000000 -0500 ++++ vnc_unixsrc/vncviewer/cursor.c 2005-02-05 12:28:10.000000000 -0500 +@@ -472,6 +472,140 @@ + int offset, bytesPerPixel; + char *pos; + ++#define alphahack ++#ifdef alphahack ++ /* hack to have cursor transparency at 32bpp <[email protected]> */ ++ static int alphablend = -1; ++ ++ if (alphablend < 0) { ++ /* you have to set NO_ALPHABLEND=1 in your environment to disable */ ++ if (getenv("NO_ALPHABLEND")) { ++ alphablend = 0; ++ } else { ++ alphablend = 1; ++ } ++ } ++ ++ bytesPerPixel = myFormat.bitsPerPixel / 8; ++ ++ if (alphablend && bytesPerPixel == 4) { ++ unsigned long pixel, put, *upos, *upix; ++ int got_alpha = 0, rsX, rsY, rsW, rsH; ++ static XImage *image = NULL; ++ static int iwidth = 128; ++ ++ if (! image) { ++ /* watch out for tiny fb (rare) */ ++ if (iwidth > si.framebufferWidth) { ++ iwidth = si.framebufferWidth; ++ } ++ if (iwidth > si.framebufferHeight) { ++ iwidth = si.framebufferHeight; ++ } ++ ++ /* initialize an XImage with a chunk of desktopWin */ ++ image = XGetImage(dpy, desktopWin, 0, 0, iwidth, iwidth, ++ AllPlanes, ZPixmap); ++ } ++ ++ /* first check if there is any non-zero alpha channel data at all: */ ++ for (y = 0; y < rcHeight; y++) { ++ for (x = 0; x < rcWidth; x++) { ++ int alpha; ++ ++ offset = y * rcWidth + x; ++ pos = (char *)&rcSource[offset * bytesPerPixel]; ++ ++ upos = (unsigned long *) pos; ++ alpha = (*upos & 0xff000000) >> 24; ++ if (alpha) { ++ got_alpha = 1; ++ break; ++ } ++ } ++ if (got_alpha) { ++ break; ++ } ++ } ++ ++ if (!got_alpha) { ++ /* no alpha channel data, fallback to the old way */ ++ goto oldway; ++ } ++ ++ /* load the saved fb patch in to image (faster way?) */ ++ XGetSubImage(dpy, rcSavedArea, 0, 0, rcWidth, rcHeight, ++ AllPlanes, ZPixmap, image, 0, 0); ++ upix = (unsigned long *)image->data; ++ ++ /* if the richcursor is clipped, the fb patch will be smaller */ ++ rsW = rcWidth; ++ rsX = 0; /* used to denote a shift from the left side */ ++ x = rcCursorX - rcHotX; ++ if (x < 0) { ++ rsW += x; ++ rsX = -x; ++ } else if (x + rsW > si.framebufferWidth) { ++ rsW = si.framebufferWidth - x; ++ } ++ rsH = rcHeight; ++ rsY = 0; /* used to denote a shift from the top side */ ++ y = rcCursorY - rcHotY; ++ if (y < 0) { ++ rsH += y; ++ rsY = -y; ++ } else if (y + rsH > si.framebufferHeight) { ++ rsH = si.framebufferHeight - y; ++ } ++ ++ /* ++ * now loop over the cursor data, blend in the fb values, ++ * and then overwrite the fb (CopyDataToScreen()) ++ */ ++ for (y = 0; y < rcHeight; y++) { ++ y0 = rcCursorY - rcHotY + y; ++ if (y0 < 0 || y0 >= si.framebufferHeight) { ++ continue; /* clipped */ ++ } ++ for (x = 0; x < rcWidth; x++) { ++ int alpha, color_curs, color_fb, i; ++ ++ x0 = rcCursorX - rcHotX + x; ++ if (x0 < 0 || x0 >= si.framebufferWidth) { ++ continue; /* clipped */ ++ } ++ ++ offset = y * rcWidth + x; ++ pos = (char *)&rcSource[offset * bytesPerPixel]; ++ ++ /* extract secret alpha byte from rich cursor: */ ++ upos = (unsigned long *) pos; ++ alpha = (*upos & 0xff000000) >> 24; /* XXX MSB? */ ++ ++ /* extract the pixel from the fb: */ ++ pixel = *(upix + (y-rsY)*iwidth + (x-rsX)); ++ ++ put = 0; ++ /* for simplicity, blend all 4 bytes */ ++ for (i = 0; i < 4; i++) { ++ int sh = i*8; ++ color_curs = ((0xff << sh) & *upos) >> sh; ++ color_fb = ((0xff << sh) & pixel) >> sh; ++ ++ /* XXX assumes pre-multipled color_curs */ ++ color_fb = color_curs ++ + ((0xff - alpha) * color_fb)/0xff; ++ put |= color_fb << sh; ++ } ++ /* place in the fb: */ ++ CopyDataToScreen((char *)&put, x0, y0, 1, 1); ++ } ++ } ++ return; ++ } ++oldway: ++#endif ++ + bytesPerPixel = myFormat.bitsPerPixel / 8; + + /* FIXME: Speed optimization is possible. */ |