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Taskbar: thumbnails (make sure we are using rgb24)

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This commit is contained in:
o9000 2017-11-15 14:11:39 +01:00
parent e597973cd7
commit 89ab1fa6c4
1 changed files with 27 additions and 3 deletions
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30
src/util/window.c
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@ -424,6 +424,10 @@ cairo_surface_t *screenshot(Window win, size_t size)
fprintf(stderr, RED "tint2: !ximg" RESET "\n");
goto err0;
}
if (ximg->bits_per_pixel != 24 && ximg->bits_per_pixel != 32) {
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");
@ -475,9 +479,9 @@ cairo_surface_t *screenshot(Window win, size_t size)
const size_t offset_y7 = 5 * ystep / 8;
const size_t offset_x7 = 3 * xstep / 16;
const size_t rmask = ximg->red_mask;
const size_t gmask = ximg->green_mask;
const size_t bmask = ximg->blue_mask;
const u_int32_t rmask = (u_int32_t)ximg->red_mask;
const u_int32_t gmask = (u_int32_t)ximg->green_mask;
const u_int32_t bmask = (u_int32_t)ximg->blue_mask;
for (size_t yt = 0, y = 0; yt < th; yt++, y += ystep) {
for (size_t xt = 0, x = 0; xt < fw; xt++, x += xstep) {
size_t j = yt * tw + ox + xt;
@ -500,6 +504,26 @@ cairo_surface_t *screenshot(Window win, size_t size)
data[j] = (r & rmask) | (g & gmask) | (b & bmask);
}
}
// Convert to argb32
if (rmask & 0xff0000) {
// argb32 or rgb24 => Nothing to do
} else if (rmask & 0xff) {
// bgr24
for (size_t i = 0; i < tw * th; i++) {
u_int32_t r = (data[i] & rmask) << 16;
u_int32_t g = (data[i] & gmask);
u_int32_t b = (data[i] & bmask) >> 16;
data[i] = (r & 0xff0000) | (g & 0x00ff00) | (b & 0x0000ff);
}
} else if (rmask & 0xff00) {
// bgra32
for (size_t i = 0; i < tw * th; i++) {
u_int32_t r = (data[i] & rmask) << 8;
u_int32_t g = (data[i] & gmask) >> 8;
u_int32_t b = (data[i] & bmask) >> 24;
data[i] = (r & 0xff0000) | (g & 0x00ff00) | (b & 0x0000ff);
}
}
// 2nd pass
smooth_thumbnail(result);