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Code Issues Releases Wiki Activity

🐛 修复了printk在画面滚动时产生的画面撕裂问题

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This commit is contained in:
fslongjin 2022-03-17 00:00:00 +08:00
parent f95fa63972
commit cc1e126959
1 changed files with 17 additions and 6 deletions
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23
kernel/common/printk.c
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@ -113,8 +113,8 @@ void auto_newline()
{
pos.y = pos.max_y;
int lines_to_scroll = 2;
scroll(true, lines_to_scroll * pos.char_size_y, false);
pos.y -= (lines_to_scroll-1);
scroll(true, lines_to_scroll * pos.char_size_y, true);
pos.y -= (lines_to_scroll - 1);
}
}
@ -723,9 +723,7 @@ int do_scroll(bool direction, int pixels)
memcpy(pos.FB_address, (pos.FB_address + src), sizeof(unsigned int) * (pos.FB_length - src));
memset(pos.FB_address + (pos.FB_length - src), 0, sizeof(unsigned int) * (src));
for (int i = 0; i < 1000; ++i)
for (int j = 0; j < 1000; ++j)
;
return 0;
}
else
@ -741,7 +739,7 @@ int do_scroll(bool direction, int pixels)
*/
// @todo: 修复用户态触发键盘中断时产生#UD错误
// @todo：采用双缓冲区，防止画面撕裂
// @todo：采用双缓冲区
int scroll(bool direction, int pixels, bool animation)
{
// 暂时不支持反方向滚动
@ -756,6 +754,7 @@ int scroll(bool direction, int pixels, bool animation)
return do_scroll(direction, pixels);
else
{
int count_pixels = 0;
int steps;
if (pixels > 10)
steps = 5;
@ -776,6 +775,7 @@ int scroll(bool direction, int pixels, bool animation)
trace[js_trace] = (int)(accelerate * i + 0.5);
current_pixels += trace[js_trace];
do_scroll(direction, trace[js_trace]);
count_pixels += trace[js_trace];
++js_trace;
}
@ -784,6 +784,8 @@ int scroll(bool direction, int pixels, bool animation)
if (current_pixels < pixels / 2)
{
delta_x = pixels / 2 - current_pixels;
current_pixels += delta_x;
count_pixels += delta_x;
do_scroll(direction, delta_x);
}
@ -792,6 +794,7 @@ int scroll(bool direction, int pixels, bool animation)
{
current_pixels += trace[i];
do_scroll(direction, trace[i]);
count_pixels += trace[i];
}
if (current_pixels > pixels)
@ -801,8 +804,16 @@ int scroll(bool direction, int pixels, bool animation)
if (current_pixels < pixels)
{
delta_x = pixels - current_pixels;
count_pixels += delta_x;
current_pixels += delta_x;
do_scroll(direction, delta_x);
}
if (count_pixels != pixels)
{
kBUG("In printk: count_pixels(%d) != pixels(%d) current_pixels = %d", count_pixels, pixels, current_pixels);
while (1)
;
}
}
return 0;