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xorg-x11-server/N_fix-dpi-values.diff

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From: Egbert Eich <eich@suse.de>
Fix calculation of DPI using mode data if present.
Index: hw/xfree86/common/xf86Helper.c
===================================================================
--- hw/xfree86/common/xf86Helper.c.orig
+++ hw/xfree86/common/xf86Helper.c
2021-10-27 18:05:03 +02:00
@@ -883,12 +883,22 @@ xf86SetDpi(ScrnInfoPtr pScrn, int x, int
else if (pScrn->widthmm > 0 || pScrn->heightmm > 0) {
from = X_CONFIG;
if (pScrn->widthmm > 0) {
- pScrn->xDpi =
- (int) ((double) pScrn->virtualX * MMPERINCH / pScrn->widthmm);
+ if (pScrn->modes && pScrn->modes->HDisplay > 0) {
+ pScrn->xDpi =
+ (int)((double) pScrn->modes->HDisplay * MMPERINCH / pScrn->widthmm);
+ } else {
+ pScrn->xDpi =
+ (int)((double)pScrn->virtualX * MMPERINCH / pScrn->widthmm);
+ }
}
if (pScrn->heightmm > 0) {
- pScrn->yDpi =
- (int) ((double) pScrn->virtualY * MMPERINCH / pScrn->heightmm);
+ if (pScrn->modes && pScrn->modes->VDisplay > 0) {
+ pScrn->yDpi =
+ (int)((double)pScrn->modes->VDisplay * MMPERINCH / pScrn->heightmm);
+ } else {
+ pScrn->yDpi =
+ (int)((double)pScrn->virtualY * MMPERINCH / pScrn->heightmm);
+ }
}
if (pScrn->xDpi > 0 && pScrn->yDpi <= 0)
pScrn->yDpi = pScrn->xDpi;
2021-10-27 18:05:03 +02:00
@@ -927,12 +937,22 @@ xf86SetDpi(ScrnInfoPtr pScrn, int x, int
pScrn->widthmm = probedWidthmm;
pScrn->heightmm = probedHeightmm;
if (pScrn->widthmm > 0) {
- pScrn->xDpi =
- (int) ((double) pScrn->virtualX * MMPERINCH / pScrn->widthmm);
+ if (pScrn->modes && pScrn->modes->HDisplay > 0) {
+ pScrn->xDpi =
+ (int)((double) pScrn->modes->HDisplay * MMPERINCH / pScrn->widthmm);
+ } else {
+ pScrn->xDpi =
+ (int)((double)pScrn->virtualX * MMPERINCH / pScrn->widthmm);
+ }
}
if (pScrn->heightmm > 0) {
- pScrn->yDpi =
- (int) ((double) pScrn->virtualY * MMPERINCH / pScrn->heightmm);
+ if (pScrn->modes && pScrn->modes->VDisplay > 0) {
+ pScrn->yDpi =
+ (int)((double)pScrn->modes->VDisplay * MMPERINCH / pScrn->heightmm);
+ } else {
+ pScrn->yDpi =
+ (int)((double)pScrn->virtualY * MMPERINCH / pScrn->heightmm);
+ }
}
if (pScrn->xDpi > 0 && pScrn->yDpi <= 0)
pScrn->yDpi = pScrn->xDpi;