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patch 9.0.0720: MS-Windows GUI may have pixel dust from antialiasing

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Problem:    MS-Windows GUI may have pixel dust from antialiasing.
Solution:   When a character changes also redraw the next one. (issue #8532)
This commit is contained in:
Bram Moolenaar
2022-10-11 12:48:44 +01:00
parent 56564964e6
commit 0c502d2e70
2 changed files with 24 additions and 0 deletions
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22
src/screen.c
View File

@@ -475,6 +475,10 @@ screen_line(
#endif #endif
; ;
int redraw_next; // redraw_this for next character int redraw_next; // redraw_this for next character
#ifdef FEAT_GUI_MSWIN
int changed_this; // TRUE if character changed
int changed_next; // TRUE if next character changed
#endif
int clear_next = FALSE; int clear_next = FALSE;
int char_cells; // 1: normal char int char_cells; // 1: normal char
// 2: occupies two display cells // 2: occupies two display cells
@@ -534,6 +538,9 @@ screen_line(
#endif #endif
redraw_next = char_needs_redraw(off_from, off_to, endcol - col); redraw_next = char_needs_redraw(off_from, off_to, endcol - col);
#ifdef FEAT_GUI_MSWIN
changed_next = redraw_next;
#endif
while (col < endcol) while (col < endcol)
{ {
@@ -547,15 +554,24 @@ screen_line(
off_to + char_cells, endcol - col - char_cells); off_to + char_cells, endcol - col - char_cells);
#ifdef FEAT_GUI #ifdef FEAT_GUI
# ifdef FEAT_GUI_MSWIN
changed_this = changed_next;
changed_next = redraw_next;
# endif
// If the next character was bold, then redraw the current character to // If the next character was bold, then redraw the current character to
// remove any pixels that might have spilt over into us. This only // remove any pixels that might have spilt over into us. This only
// happens in the GUI. // happens in the GUI.
// With MS-Windows antialiasing may also cause pixels to spill over
// from a previous character, no matter attributes, always redraw if a
// character changed.
if (redraw_next && gui.in_use) if (redraw_next && gui.in_use)
{ {
# ifndef FEAT_GUI_MSWIN
hl = ScreenAttrs[off_to + char_cells]; hl = ScreenAttrs[off_to + char_cells];
if (hl > HL_ALL) if (hl > HL_ALL)
hl = syn_attr2attr(hl); hl = syn_attr2attr(hl);
if (hl & HL_BOLD) if (hl & HL_BOLD)
# endif
redraw_this = TRUE; redraw_this = TRUE;
} }
#endif #endif
@@ -688,6 +704,12 @@ screen_line(
if (hl & HL_BOLD) if (hl & HL_BOLD)
redraw_next = TRUE; redraw_next = TRUE;
} }
#endif
#ifdef FEAT_GUI_MSWIN
// MS-Windows antialiasing may spill over to the next character,
// redraw that one if this one changed, no matter attributes.
if (gui.in_use && changed_this)
redraw_next = TRUE;
#endif #endif
ScreenAttrs[off_to] = ScreenAttrs[off_from]; ScreenAttrs[off_to] = ScreenAttrs[off_from];

2
src/version.c
View File

@@ -699,6 +699,8 @@ static char *(features[]) =
static int included_patches[] = static int included_patches[] =
{ /* Add new patch number below this line */ { /* Add new patch number below this line */
/**/
720,
/**/ /**/
719, 719,
/**/ /**/