Report correct RandR 1.0 sizeID. Report correct subpixel order.

RandR 1.0 sizeID must be computed the same way every time, so when reporting
it in the ScreenChangeNotify event, just construct the usual 1.0 data block
and use that.

subpixel geometry information can be computed by looking at the connected
outputs and finding any with subpixel geometry and using one of those for
the global screen subpixel geometry. This might be improved by reporting
None if more than one screen has information and they conflict.

4 files changed, 77 insertions, 0 deletions

diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index 5e0a0c602..bda805519 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -144,6 +144,71 @@ xf86CrtcInUse (xf86CrtcPtr crtc)
     return FALSE;
 }
 
+void
+xf86CrtcSetScreenSubpixelOrder (ScreenPtr pScreen)
+{
+#ifdef RENDER
+    int			subpixel_order = SubPixelUnknown;
+    Bool		has_none = FALSE;
+    ScrnInfoPtr		scrn = xf86Screens[pScreen->myNum];
+    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
+    int			c, o;
+
+    for (c = 0; c < xf86_config->num_crtc; c++)
+    {
+	xf86CrtcPtr crtc = xf86_config->crtc[c];
+	
+	for (o = 0; o < xf86_config->num_output; o++)
+	{
+	    xf86OutputPtr   output = xf86_config->output[o];
+
+	    if (output->crtc == crtc)
+	    {
+		switch (output->subpixel_order) {
+		case SubPixelNone:
+		    has_none = TRUE;
+		    break;
+		case SubPixelUnknown:
+		    break;
+		default:
+		    subpixel_order = output->subpixel_order;
+		    break;
+		}
+	    }
+	    if (subpixel_order != SubPixelUnknown)
+		break;
+	}
+	if (subpixel_order != SubPixelUnknown)
+	{
+	    static const int circle[4] = {
+		SubPixelHorizontalRGB,
+		SubPixelVerticalRGB,
+		SubPixelHorizontalBGR,
+		SubPixelVerticalBGR,
+	    };
+	    int	rotate;
+	    int c;
+	    for (rotate = 0; rotate < 4; rotate++)
+		if (crtc->rotation & (1 << rotate))
+		    break;
+	    for (c = 0; c < 4; c++)
+		if (circle[c] == subpixel_order)
+		    break;
+	    c = (c + rotate) & 0x3;
+	    if ((crtc->rotation & RR_Reflect_X) && !(c & 1))
+		c ^= 2;
+	    if ((crtc->rotation & RR_Reflect_Y) && (c & 1))
+		c ^= 2;
+	    subpixel_order = circle[c];
+	    break;
+	}
+    }
+    if (subpixel_order == SubPixelUnknown && has_none)
+	subpixel_order = SubPixelNone;
+    PictureSetSubpixelOrder (pScreen, subpixel_order);
+#endif
+}
+
 /**
  * Sets the given video mode on the given crtc
  */
@@ -245,6 +310,8 @@ xf86CrtcSetMode (xf86CrtcPtr crtc, DisplayModePtr mode, Rotation rotation,
 
     /* XXX free adjustedmode */
     ret = TRUE;
+    xf86CrtcSetScreenSubpixelOrder (scrn->pScreen);
+
 done:
     if (!ret) {
 	crtc->x = saved_x;
diff --git a/hw/xfree86/modes/xf86Crtc.h b/hw/xfree86/modes/xf86Crtc.h
index 49f4965ba..07f7d4960 100644
--- a/hw/xfree86/modes/xf86Crtc.h
+++ b/hw/xfree86/modes/xf86Crtc.h
@@ -552,4 +552,12 @@ xf86DiDGAInit (ScreenPtr pScreen, unsigned long dga_address);
 Bool
 xf86DiDGAReInit (ScreenPtr pScreen);
 
+/*
+ * Set the subpixel order reported for the screen using
+ * the information from the outputs
+ */
+
+void
+xf86CrtcSetScreenSubpixelOrder (ScreenPtr pScreen);
+
 #endif /* _XF86CRTC_H_ */
diff --git a/hw/xfree86/modes/xf86RandR12.c b/hw/xfree86/modes/xf86RandR12.c
index 2a5d7bab2..1dacb6f34 100644
--- a/hw/xfree86/modes/xf86RandR12.c
+++ b/hw/xfree86/modes/xf86RandR12.c
@@ -433,6 +433,7 @@ xf86RandR12CreateScreenResources (ScreenPtr pScreen)
 	randrp->virtualX = pScrn->virtualX;
 	randrp->virtualY = pScrn->virtualY;
     }
+    xf86CrtcSetScreenSubpixelOrder (pScreen);
 #if RANDR_12_INTERFACE
     if (xf86RandR12CreateScreenResources12 (pScreen))
 	return TRUE;
diff --git a/hw/xfree86/modes/xf86Rename.h b/hw/xfree86/modes/xf86Rename.h
index a00253d56..ce4d21796 100644
--- a/hw/xfree86/modes/xf86Rename.h
+++ b/hw/xfree86/modes/xf86Rename.h
@@ -73,5 +73,6 @@
 #define xf86RandR12SetConfig XF86NAME(xf86RandR12SetConfig)
 #define xf86RandR12SetRotations XF86NAME(xf86RandR12SetRotations)
 #define xf86SaveScreen XF86NAME(xf86SaveScreen)
+#define xf86CrtcSetScreenSubpixelOrder XF86NAME(xf86CrtcSetScreenSubpixelOrder)
 
 #endif /* _XF86RENAME_H_ */