| 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> |
| 18 | #include <dlfcn.h> |
| 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 | |
| 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 | |
| 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 | |
| 51 | pXGetGeometry(x11display, x11window, &root, &dx, &dy, &dw, &dh, |
| 52 | &dummy, &dummy); |
| 53 | pXGetWindowAttributes(x11display, root, &xattrs_root); |
| 54 | |
| 55 | if (dw == xattrs_root.width && dh == xattrs_root.height) |
| 56 | return; // use fullscreen |
| 57 | |
| 58 | pXTranslateCoordinates(x11display, x11window, root, |
| 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 | { |
| 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 | } |
| 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(); |
| 127 | |
| 128 | if (x11lib) { |
| 129 | dlclose(x11lib); |
| 130 | x11lib = NULL; |
| 131 | } |
| 132 | |
| 133 | x11display = NULL; |
| 134 | x11window = 0; |
| 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 |