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win32u: Only retrieve the dc size if needed. 

SetMapMode(.., MM_TEXT) is called a lot in common gdiplus use cases via
gdi_transform_acquire(). Querying the size and resolution can be
expensive, so skip it when its not needed.

When running the "ZusiDisplay" ET423 diagnostic display, which uses
gdiplus heavily, this change increases the "indicator blinking speed"
from 0.6 per second to 1 per second and probably hits the FPS limit now.
Also, CPU usage of the ZusiDisplay.exe process goes down from ~75% to
~42% of one core according to "top", and wineserver CPU usage goes down
from ~48% to ~3%.

Signed-off-by: Florian Will <florian.will@gmail.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Florian Will 2021-11-26 09:20:26 +00:00 committed by Alexandre Julliard
parent 21cf2dd15f
commit 6dfad4c2fb
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
dlls/win32u/mapping.c
View File

@ -117,8 +117,6 @@ BOOL set_map_mode( DC *dc, int mode )
if (mode == dc->attr->map_mode && (mode == MM_ISOTROPIC || mode == MM_ANISOTROPIC))
return TRUE;
virtual_size = get_dc_virtual_size( dc );
virtual_res = get_dc_virtual_res( dc );
switch (mode)
{
case MM_TEXT:
@ -129,30 +127,40 @@ BOOL set_map_mode( DC *dc, int mode )
break;
case MM_LOMETRIC:
case MM_ISOTROPIC:
virtual_size = get_dc_virtual_size( dc );
virtual_res = get_dc_virtual_res( dc );
dc->attr->wnd_ext.cx = virtual_size.cx * 10;
dc->attr->wnd_ext.cy = virtual_size.cy * 10;
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_HIMETRIC:
virtual_size = get_dc_virtual_size( dc );
virtual_res = get_dc_virtual_res( dc );
dc->attr->wnd_ext.cx = virtual_size.cx * 100;
dc->attr->wnd_ext.cy = virtual_size.cy * 100;
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_LOENGLISH:
virtual_size = get_dc_virtual_size( dc );
virtual_res = get_dc_virtual_res( dc );
dc->attr->wnd_ext.cx = muldiv(1000, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(1000, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_HIENGLISH:
virtual_size = get_dc_virtual_size( dc );
virtual_res = get_dc_virtual_res( dc );
dc->attr->wnd_ext.cx = muldiv(10000, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(10000, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;
dc->attr->vport_ext.cy = -virtual_res.cy;
break;
case MM_TWIPS:
virtual_size = get_dc_virtual_size( dc );
virtual_res = get_dc_virtual_res( dc );
dc->attr->wnd_ext.cx = muldiv(14400, virtual_size.cx, 254);
dc->attr->wnd_ext.cy = muldiv(14400, virtual_size.cy, 254);
dc->attr->vport_ext.cx = virtual_res.cx;