vmwgfx_rr_inlines.h revision 34a0776d 
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26/*
27 * This file contains calls into the RandR1.2 code and modification of core
28 * RandR data structures that probably were never intended from drivers.
29 */
30
31#ifndef _VMWGFX_RR_INLINES_H_
32#define _VMWGFX_RR_INLINES_H_
33
34#include <xf86Crtc.h>
35#include <xf86RandR12.h>
36
37#define VMW_DPI 96.
38#define VMW_INCH_TO_MM 25.4
39
40/**
41 * vmwgfx_notify_rr - Notify RandR that our configuration has changed.
42 *
43 * @pScreen: Pointer to the affected screen.
44 *
45 * Normally screen configurations are typically only changed using RandR,
46 * so when we do it in an udev handler, we need to notify RandR that we've
47 * made a change, so that it can be propagated to all RandR clients.
48 */
49static inline void
50vmwgfx_notify_rr(ScreenPtr pScreen)
51{
52    rrScrPriv(pScreen);
53
54
55    /*
56     * We need to update the time-stamps, otherwise X clients that haven't
57     * yet read this config might just overwrite it.
58     * This effectively stops the desktop manager from trying to
59     * outsmart us, since RandR simply doesn't accept requests from
60     * clients that haven't read this config and tag their request with
61     * an earlier timestamp.
62     */
63    pScrPriv->lastSetTime = currentTime;
64    pScrPriv->lastConfigTime = currentTime;
65#ifdef RANDR_12_INTERFACE
66    xf86RandR12TellChanged(pScreen);
67#else
68    RRTellChanged(pScreen);
69#endif
70}
71
72/**
73 * vmwgfx_rr_screen_set_size - Use RandR to change the root pixmap dimensions.
74 *
75 * @pScreen: Pointer to the affected screen.
76 *
77 * Returns: TRUE if successful. False otherwise.
78 */
79static inline Bool
80vmwgfx_rr_screen_set_size(ScreenPtr pScreen, int width, int height)
81{
82    rrScrPriv(pScreen);
83    float mm_width, mm_height;
84
85    mm_width = ((float) width) * VMW_INCH_TO_MM / VMW_DPI + .5;
86    mm_height = ((float) height) * VMW_INCH_TO_MM / VMW_DPI + .5;
87
88    return pScrPriv->rrScreenSetSize(pScreen, width, height,
89				     (int) mm_width, (int) mm_height);
90}
91
92#endif
93