display-core.c revision ac389ae4513263597dc02e4099867d5123faaa04 
1/* Copyright (C) 2010 The Android Open Source Project
2**
3** This software is licensed under the terms of the GNU General Public
4** License version 2, as published by the Free Software Foundation, and
5** may be copied, distributed, and modified under those terms.
6**
7** This program is distributed in the hope that it will be useful,
8** but WITHOUT ANY WARRANTY; without even the implied warranty of
9** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10** GNU General Public License for more details.
11*/
12
13/*
14 * Contains extension to android display (see android/display.h|c) that is used
15 * by the core to communicate display changes to the attached UI
16 */
17
18#include "android/utils/system.h"
19#include "android/display-core.h"
20
21/* Core display descriptor. */
22struct CoreDisplay {
23    /* Display state for this core display. */
24    DisplayState*       ds;
25
26    /* Framebuffer for this core display. */
27    QFrameBuffer*       fb;
28
29    /* Framebuffer service associated with this core display. */
30    CoreFramebuffer*    core_fb;
31};
32
33/* One and only one core display instance. */
34CoreDisplay core_display;
35
36/*
37 * Framebuffer calls this routine when it detects changes. This routine will
38 * initiate a "push" of the framebuffer changes to the UI.
39 * See QFrameBufferUpdateFunc in framebuffer.h for more info on this callback.
40 */
41static void
42coredisplay_fb_update(void* opaque, int x, int y, int w, int h)
43{
44    CoreDisplay* cd = (CoreDisplay*)opaque;
45    if (cd->core_fb) {
46        corefb_update(cd->core_fb, cd->fb, x, y, w, h);
47    }
48}
49
50/*
51 * Framebuffer callback. See QFrameBufferRotateFunc in framebuffer.h for more
52 * info on this callback.
53 */
54static void
55coredisplay_fb_rotate(void* opaque, int rotation)
56{
57}
58
59/*
60 * Framebuffer callback. See QFrameBufferPollFunc in framebuffer.h for more
61 * info on this callback.
62 */
63static void
64coredisplay_fb_poll(void* opaque)
65{
66    // This will eventually call core_display_fb_update.
67    qframebuffer_check_updates();
68}
69
70/*
71 * Framebuffer callback. See QFrameBufferDoneFunc in framebuffer.h for more
72 * info on this callback.
73 */
74static void
75coredisplay_fb_done(void* opaque)
76{
77}
78
79void
80coredisplay_init(DisplayState* ds)
81{
82    int format;
83
84    core_display.ds = ds;
85    /* Create and initialize framebuffer instance that will be used for core
86     * display.
87     */
88    ANEW0(core_display.fb);
89    core_display.core_fb = NULL;
90
91    /* In the core, there is no skin to parse and the format of ds->surface
92     * is determined by the -android-gui option.
93     */
94    format = QFRAME_BUFFER_RGB565;
95    if (ds->surface->pf.bytes_per_pixel == 4)
96        format = QFRAME_BUFFER_RGBX_8888;
97
98    qframebuffer_init(core_display.fb, ds->surface->width, ds->surface->height,
99                      0, format);
100    qframebuffer_fifo_add(core_display.fb);
101    /* Register core display as the client for the framebuffer, so we can start
102     * receiving framebuffer notifications. Note that until UI connects to the
103     * core all framebuffer callbacks are essentially no-ops.
104     */
105    qframebuffer_add_client(core_display.fb, &core_display,
106                            coredisplay_fb_update, coredisplay_fb_rotate,
107                            coredisplay_fb_poll, coredisplay_fb_done);
108    android_display_init(ds, core_display.fb);
109}
110
111int
112coredisplay_attach_fb_service(CoreFramebuffer* core_fb)
113{
114    if (core_display.core_fb == NULL) {
115        core_display.core_fb = core_fb;
116        return 0;
117    } else {
118        return -1;
119    }
120}
121
122CoreFramebuffer*
123coredisplay_detach_fb_service(void)
124{
125    CoreFramebuffer* ret = core_display.core_fb;
126    core_display.core_fb = NULL;
127    return ret;
128}
129
130QFrameBuffer*
131coredisplay_get_framebuffer(void)
132{
133    return core_display.fb;
134}
135