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Taskbar: thumbnails (use slower but safed XGetImage)

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This commit is contained in:
o9000 2017-11-16 11:39:44 +01:00
parent e8a6c93b28
commit 4b50446a7b
1 changed files with 65 additions and 39 deletions
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104
src/util/window.c
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@ -371,8 +371,8 @@ void smooth_thumbnail(cairo_surface_t *image_surface)
const size_t bmask = 0xff;
for (size_t i = 0; i < tw * (th - 1) - 1; i++) {
u_int32_t c1 = data[i];
u_int32_t c2 = data[i+1];
u_int32_t c3 = data[i+tw];
u_int32_t c2 = data[i + 1];
u_int32_t c3 = data[i + tw];
u_int32_t b = (6 * (c1 & bmask) + (c2 & bmask) + (c3 & bmask)) / 8;
u_int32_t g = (6 * (c1 & gmask) + (c2 & gmask) + (c3 & gmask)) / 8;
u_int32_t r = (6 * (c1 & rmask) + (c2 & rmask) + (c3 & rmask)) / 8;
@ -381,14 +381,15 @@ void smooth_thumbnail(cairo_surface_t *image_surface)
}
// This is measured to be slightly faster.
#define GetPixel(ximg, x, y) ((u_int32_t*)&(ximg->data[y * ximg->bytes_per_line]))[x]
#define GetPixel(ximg, x, y) ((u_int32_t *)&(ximg->data[y * ximg->bytes_per_line]))[x]
//#define GetPixel XGetPixel
cairo_surface_t *screenshot(Window win, size_t size)
cairo_surface_t *get_window_thumbnail_ximage(Window win, size_t size, gboolean use_shm)
{
cairo_surface_t *result = NULL;
XWindowAttributes wa;
if (!XGetWindowAttributes(server.display, win, &wa) || wa.width <= 0 || wa.height <= 0 || wa.map_state != IsViewable)
if (!XGetWindowAttributes(server.display, win, &wa) || wa.width <= 0 || wa.height <= 0 ||
wa.map_state != IsViewable)
goto err0;
if (window_is_iconified(win))
@ -412,14 +413,18 @@ cairo_surface_t *screenshot(Window win, size_t size)
}
XShmSegmentInfo shminfo;
XImage *ximg = XShmCreateImage(server.display,
wa.visual,
(unsigned)wa.depth,
ZPixmap,
NULL,
&shminfo,
(unsigned)wa.width,
(unsigned)wa.height);
XImage *ximg;
if (use_shm)
ximg = XShmCreateImage(server.display,
wa.visual,
(unsigned)wa.depth,
ZPixmap,
NULL,
&shminfo,
(unsigned)wa.width,
(unsigned)wa.height);
else
ximg = XGetImage(server.display, win, 0, 0, (unsigned)wa.width, (unsigned)wa.height, AllPlanes, ZPixmap);
if (!ximg) {
fprintf(stderr, RED "tint2: !ximg" RESET "\n");
goto err0;
@ -428,24 +433,26 @@ cairo_surface_t *screenshot(Window win, size_t size)
fprintf(stderr, RED "tint2: unusual bits_per_pixel" RESET "\n");
goto err1;
}
shminfo.shmid = shmget(IPC_PRIVATE, (size_t)(ximg->bytes_per_line * ximg->height), IPC_CREAT | 0777);
if (shminfo.shmid < 0) {
fprintf(stderr, RED "tint2: !shmget" RESET "\n");
goto err1;
}
shminfo.shmaddr = ximg->data = (char *)shmat(shminfo.shmid, 0, 0);
if (!shminfo.shmaddr) {
fprintf(stderr, RED "tint2: !shmat" RESET "\n");
goto err2;
}
shminfo.readOnly = False;
if (!XShmAttach(server.display, &shminfo)) {
fprintf(stderr, RED "tint2: !xshmattach" RESET "\n");
goto err3;
}
if (!XShmGetImage(server.display, win, ximg, 0, 0, AllPlanes)) {
fprintf(stderr, RED "tint2: !xshmgetimage" RESET "\n");
goto err4;
if (use_shm) {
shminfo.shmid = shmget(IPC_PRIVATE, (size_t)(ximg->bytes_per_line * ximg->height), IPC_CREAT | 0777);
if (shminfo.shmid < 0) {
fprintf(stderr, RED "tint2: !shmget" RESET "\n");
goto err1;
}
shminfo.shmaddr = ximg->data = (char *)shmat(shminfo.shmid, 0, 0);
if (!shminfo.shmaddr) {
fprintf(stderr, RED "tint2: !shmat" RESET "\n");
goto err2;
}
shminfo.readOnly = False;
if (!XShmAttach(server.display, &shminfo)) {
fprintf(stderr, RED "tint2: !xshmattach" RESET "\n");
goto err3;
}
if (!XShmGetImage(server.display, win, ximg, 0, 0, AllPlanes)) {
fprintf(stderr, RED "tint2: !xshmgetimage" RESET "\n");
goto err4;
}
}
XGetWindowAttributes(server.display, win, &wa);
@ -530,11 +537,14 @@ cairo_surface_t *screenshot(Window win, size_t size)
smooth_thumbnail(result);
err4:
XShmDetach(server.display, &shminfo);
if (use_shm)
XShmDetach(server.display, &shminfo);
err3:
shmdt(shminfo.shmaddr);
if (use_shm)
shmdt(shminfo.shmaddr);
err2:
shmctl(shminfo.shmid, IPC_RMID, NULL);
if (use_shm)
shmctl(shminfo.shmid, IPC_RMID, NULL);
err1:
XDestroyImage(ximg);
err0:
@ -545,7 +555,8 @@ cairo_surface_t *get_window_thumbnail_cairo(Window win, int size)
{
static cairo_filter_t filter = CAIRO_FILTER_BEST;
XWindowAttributes wa;
if (!XGetWindowAttributes(server.display, win, &wa) || wa.width <= 0 || wa.height <= 0 || wa.map_state != IsViewable)
if (!XGetWindowAttributes(server.display, win, &wa) || wa.width <= 0 || wa.height <= 0 ||
wa.map_state != IsViewable)
return NULL;
int w, h;
w = wa.width;
@ -616,13 +627,27 @@ cairo_surface_t *get_window_thumbnail(Window win, int size)
{
cairo_surface_t *image_surface = NULL;
if (0 && server.has_shm && server.composite_manager) {
image_surface = screenshot(win, (size_t)size);
image_surface = get_window_thumbnail_ximage(win, (size_t)size, TRUE);
if (image_surface && cairo_surface_is_blank(image_surface)) {
cairo_surface_destroy(image_surface);
image_surface = NULL;
}
if (!image_surface)
fprintf(stderr, YELLOW "tint2: thumbnail fast path failed, trying slow path" RESET "\n");
fprintf(stderr, YELLOW "tint2: XShmGetImage failed, trying slower method" RESET "\n");
else
fprintf(stderr, "tint2: captured window using XShmGetImage\n");
}
if (!image_surface) {
image_surface = get_window_thumbnail_ximage(win, (size_t)size, FALSE);
if (image_surface && cairo_surface_is_blank(image_surface)) {
cairo_surface_destroy(image_surface);
image_surface = NULL;
}
if (!image_surface)
fprintf(stderr, YELLOW "tint2: XGetImage failed, trying slower method" RESET "\n");
else
fprintf(stderr, "tint2: captured window using XGetImage\n");
}
if (!image_surface) {
@ -632,10 +657,11 @@ cairo_surface_t *get_window_thumbnail(Window win, int size)
image_surface = NULL;
}
if (!image_surface)
fprintf(stderr, YELLOW "tint2: thumbnail slow path failed" RESET "\n");
fprintf(stderr, YELLOW "tint2: capturing window failed" RESET "\n");
else
fprintf(stderr, "tint2: captured window using cairo\n");
}
if (!image_surface)
return NULL;