mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-21 21:54:10 +00:00
97 lines
3 KiB
Diff
97 lines
3 KiB
Diff
--- a/src/dummy.h 2016-12-17 23:02:53.396287041 +0100
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+++ b/src/dummy.h 2016-12-17 23:03:30.319616550 +0100
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@@ -51,6 +51,7 @@
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/* options */
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OptionInfoPtr Options;
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Bool swCursor;
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+ Bool constantDPI;
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/* proc pointer */
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CloseScreenProcPtr CloseScreen;
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xf86CursorInfoPtr CursorInfo;
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--- a/src/dummy_driver.c 2016-12-14 21:54:20.000000000 +0100
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+++ b/src/dummy_driver.c 2016-12-17 23:04:59.916416126 +0100
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@@ -17,6 +17,12 @@
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/* All drivers using the mi colormap manipulation need this */
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#include "micmap.h"
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+#ifdef RANDR
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+#include "randrstr.h"
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+#endif
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+
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+#include "windowstr.h"
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+
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/* identifying atom needed by magnifiers */
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#include <X11/Xatom.h>
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#include "property.h"
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@@ -115,11 +121,15 @@
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};
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typedef enum {
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- OPTION_SW_CURSOR
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+ OPTION_SW_CURSOR,
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+ OPTION_CONSTANT_DPI
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} DUMMYOpts;
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static const OptionInfoRec DUMMYOptions[] = {
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{ OPTION_SW_CURSOR, "SWcursor", OPTV_BOOLEAN, {0}, FALSE },
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+#ifdef RANDR
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+ { OPTION_CONSTANT_DPI, "ConstantDPI", OPTV_BOOLEAN, {0}, FALSE },
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+#endif
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{ -1, NULL, OPTV_NONE, {0}, FALSE }
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};
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@@ -359,6 +369,7 @@
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xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, dPtr->Options);
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xf86GetOptValBool(dPtr->Options, OPTION_SW_CURSOR,&dPtr->swCursor);
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+ xf86GetOptValBool(dPtr->Options, OPTION_CONSTANT_DPI, &dPtr->constantDPI);
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if (device->videoRam != 0) {
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pScrn->videoRam = device->videoRam;
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@@ -639,10 +650,45 @@
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return TRUE;
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}
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+const char *XDPY_PROPERTY = "dummy-constant-xdpi";
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+const char *YDPY_PROPERTY = "dummy-constant-ydpi";
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+static int get_dpi_value(WindowPtr root, const char *property_name, int default_dpi)
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+{
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+ PropertyPtr prop;
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+ Atom type_atom = MakeAtom("CARDINAL", 8, TRUE);
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+ Atom prop_atom = MakeAtom(property_name, strlen(property_name), FALSE);
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+
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+ for (prop = wUserProps(root); prop; prop = prop->next) {
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+ if (prop->propertyName == prop_atom && prop->type == type_atom && prop->data) {
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+ int v = (int) (*((CARD32 *) prop->data));
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+ if ((v>0) && (v<4096)) {
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+ xf86DrvMsg(0, X_INFO, "get_constant_dpi_value() found property \"%s\" with value=%i\n", property_name, (int) v);
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+ return (int) v;
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+ }
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+ break;
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+ }
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+ }
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+ return default_dpi;
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+}
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+
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/* Mandatory */
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Bool
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DUMMYSwitchMode(SWITCH_MODE_ARGS_DECL)
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{
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+ SCRN_INFO_PTR(arg);
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+#ifdef RANDR
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+ DUMMYPtr dPtr = DUMMYPTR(pScrn);
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+ if (dPtr->constantDPI) {
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+ int xDpi = get_dpi_value(pScrn->pScreen->root, XDPY_PROPERTY, pScrn->xDpi);
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+ int yDpi = get_dpi_value(pScrn->pScreen->root, YDPY_PROPERTY, pScrn->yDpi);
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+ //25.4 mm per inch: (254/10)
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+ pScrn->pScreen->mmWidth = mode->HDisplay * 254 / xDpi / 10;
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+ pScrn->pScreen->mmHeight = mode->VDisplay * 254 / yDpi / 10;
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+ xf86DrvMsg(pScrn->scrnIndex, X_INFO, "mm(dpi %ix%i)=%ix%i\n", xDpi, yDpi, pScrn->pScreen->mmWidth, pScrn->pScreen->mmHeight);
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+ RRScreenSizeNotify(pScrn->pScreen);
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+ RRTellChanged(pScrn->pScreen);
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+ }
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+#endif
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return TRUE;
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}
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