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1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | #include <EGL/egl.h> |
4 | #include <GLES/gl.h> |
5 | |
6 | #include "gl.h" |
7 | #include "gl_platform.h" |
8 | |
9 | #ifdef VCOS_VERSION |
10 | |
11 | /* |
12 | * hacks for Broadcom VideoCore / Raspberry Pi.. |
13 | * Why do I have to do this proprietary API stuff, |
14 | * couldn't they implement EGL properly? D: |
15 | */ |
16 | #include <bcm_host.h> |
17 | #include <X11/Xlib.h> |
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18 | #include <dlfcn.h> |
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19 | |
20 | static Display *x11display; |
21 | static Window x11window; |
22 | static DISPMANX_DISPLAY_HANDLE_T m_dispmanDisplay; |
23 | static EGL_DISPMANX_WINDOW_T m_nativeWindow; |
24 | |
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25 | static void *x11lib; |
26 | #define FPTR(f) typeof(f) * p##f |
27 | static FPTR(XGetGeometry); |
28 | static FPTR(XGetWindowAttributes); |
29 | static FPTR(XTranslateCoordinates); |
30 | |
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31 | static void get_window_rect(VC_RECT_T *rect) |
32 | { |
33 | XWindowAttributes xattrs_root; |
34 | uint32_t disp_w = 0, disp_h = 0; |
35 | int dx = 0, dy = 0; |
36 | unsigned int dw = 0, dh = 0, dummy; |
37 | Window root, dummyw; |
38 | |
39 | graphics_get_display_size(0, &disp_w, &disp_h); |
40 | if (disp_w == 0 || disp_h == 0) |
41 | fprintf(stderr, "ERROR: graphics_get_display_size is broken\n"); |
42 | |
43 | // default to fullscreen |
44 | rect->x = rect->y = 0; |
45 | rect->width = disp_w; |
46 | rect->height = disp_h; |
47 | |
48 | if (x11display == NULL || x11window == 0) |
49 | return; // use fullscreen |
50 | |
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51 | pXGetGeometry(x11display, x11window, &root, &dx, &dy, &dw, &dh, |
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52 | &dummy, &dummy); |
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53 | pXGetWindowAttributes(x11display, root, &xattrs_root); |
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54 | |
55 | if (dw == xattrs_root.width && dh == xattrs_root.height) |
56 | return; // use fullscreen |
57 | |
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58 | pXTranslateCoordinates(x11display, x11window, root, |
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59 | dx, dy, &dx, &dy, &dummyw); |
60 | |
61 | // how to deal with that weird centering thing? |
62 | // this is not quite right.. |
63 | dx += (disp_w - xattrs_root.width) / 2; |
64 | dy += (disp_h - xattrs_root.height) / 2; |
65 | |
66 | rect->x = dx; |
67 | rect->y = dy; |
68 | rect->width = dw; |
69 | rect->height = dh; |
70 | } |
71 | |
72 | static void submit_rect(void) |
73 | { |
74 | DISPMANX_UPDATE_HANDLE_T m_dispmanUpdate; |
75 | DISPMANX_ELEMENT_HANDLE_T m_dispmanElement; |
76 | VC_RECT_T srcRect = { 0, }; // unused, but we segfault without passing it?? |
77 | VC_RECT_T dstRect; |
78 | |
79 | get_window_rect(&dstRect); |
80 | |
81 | m_dispmanDisplay = vc_dispmanx_display_open(0); |
82 | m_dispmanUpdate = vc_dispmanx_update_start(0); |
83 | |
84 | m_dispmanElement = vc_dispmanx_element_add(m_dispmanUpdate, |
85 | m_dispmanDisplay, 0, &dstRect, 0, &srcRect, |
86 | DISPMANX_PROTECTION_NONE, 0, 0, DISPMANX_NO_ROTATE); |
87 | |
88 | m_nativeWindow.element = m_dispmanElement; |
89 | m_nativeWindow.width = dstRect.width; |
90 | m_nativeWindow.height = dstRect.height; |
91 | |
92 | vc_dispmanx_update_submit_sync(m_dispmanUpdate); |
93 | } |
94 | |
95 | int gl_platform_init(void **display, void **window, int *quirks) |
96 | { |
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97 | x11display = NULL; |
98 | x11window = 0; |
99 | |
100 | x11lib = dlopen("libX11.so.6", RTLD_LAZY); |
101 | if (x11lib != NULL) { |
102 | pXGetGeometry = dlsym(x11lib, "XGetGeometry"); |
103 | pXGetWindowAttributes = dlsym(x11lib, "XGetWindowAttributes"); |
104 | pXTranslateCoordinates = dlsym(x11lib, "XTranslateCoordinates"); |
105 | if (pXGetGeometry != NULL && pXGetWindowAttributes != NULL |
106 | && pXTranslateCoordinates != NULL) |
107 | { |
108 | x11display = *display; |
109 | x11window = (Window)*window; |
110 | } |
111 | } |
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112 | |
113 | bcm_host_init(); |
114 | submit_rect(); |
115 | |
116 | *display = EGL_DEFAULT_DISPLAY; |
117 | *window = &m_nativeWindow; |
118 | *quirks |= GL_QUIRK_ACTIVATE_RECREATE; |
119 | |
120 | return 0; |
121 | } |
122 | |
123 | void gl_platform_finish(void) |
124 | { |
125 | vc_dispmanx_display_close(m_dispmanDisplay); |
126 | bcm_host_deinit(); |
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127 | |
128 | if (x11lib) { |
129 | dlclose(x11lib); |
130 | x11lib = NULL; |
131 | } |
132 | |
133 | x11display = NULL; |
134 | x11window = 0; |
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135 | } |
136 | |
137 | #else |
138 | |
139 | int gl_platform_init(void **display, void **window, int *quirks) |
140 | { |
141 | return 0; |
142 | } |
143 | |
144 | void gl_platform_finish(void) |
145 | { |
146 | } |
147 | |
148 | #endif |