/** * Copyright 2019 JogAmp Community. All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, are * permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this list of * conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, this list * of conditions and the following disclaimer in the documentation and/or other materials * provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * The views and conclusions contained in the software and documentation are those of the * authors and should not be interpreted as representing official policies, either expressed * or implied, of JogAmp Community. */ #include #include #include #include #include #include #include #include #include #include #define WEAK __attribute__((weak)) #define VERBOSE_ON 1 #ifdef VERBOSE_ON #define DBG_PRINT(...) fprintf(stderr, __VA_ARGS__); fflush(stderr) #else #define DBG_PRINT(...) #endif #define ERR_PRINT(...) fprintf(stderr, __VA_ARGS__); fflush(stderr) #define GL_GLEXT_PROTOTYPES 1 #include #include #include #include #include typedef struct { int fd; // drmClose drmModeConnector *connector; // drmModeFreeConnector drmModeEncoder *encoder; // drmModeFreeEncoder int crtc_index; drmModeModeInfo *current_mode; } DRM_HANDLE; static void freeDrm(DRM_HANDLE *drm) { if( NULL != drm ) { if( NULL != drm->encoder ) { drmModeFreeEncoder(drm->encoder); drm->encoder = NULL; } if( NULL != drm->connector ) { drmModeFreeConnector(drm->connector); drm->connector = NULL; } if( 0 <= drm->fd ) { drmClose(drm->fd); drm->fd = -1; } free(drm); } } static DRM_HANDLE * initDrm(int verbose) { static const char *linux_dri_card0 = "/dev/dri/card0"; static const char *modules[] = { "i915", "radeon", "nouveau", "vmwgfx", "omapdrm", "exynos", "msm" }; int module_count = sizeof(modules) / sizeof(const char*); const char * module_used = NULL; int ret, i, j, area; DRM_HANDLE *drm = calloc(1, sizeof(DRM_HANDLE)); drmModeRes *resources = NULL; #ifdef VERBOSE_ON verbose = 1; #endif if( verbose ) { ERR_PRINT( "EGL_GBM.Display initDrm start\n"); } drm->fd = -1; #if 1 // try linux_dri_card0 first drm->fd = open(linux_dri_card0, O_RDWR); ERR_PRINT("EGL_GBM.Display trying to open '%s': success %d\n", linux_dri_card0, 0<=drm->fd); #endif // try drm modules for (i = 0; 0>drm->fd && i < module_count; i++) { if( verbose ) { ERR_PRINT("EGL_GBM.Display trying to load module[%d/%d] %s...", i, module_count, modules[i]); } drm->fd = drmOpen(modules[i], NULL); if (drm->fd < 0) { if( verbose ) { ERR_PRINT("failed.\n"); } } else { if( verbose ) { ERR_PRINT("success.\n"); } module_used = modules[i]; } } if (drm->fd < 0) { ERR_PRINT("EGL_GBM.Display could not open drm device\n"); goto error; } #if 0 ret = drmSetMaster(drm->fd); if(ret) { //drmDropMaster(int fd); DBG_PRINT( "EGL_GBM.Display drmSetMaster fd %d: FAILED: %d %s\n", drm->fd, ret, strerror(errno)); } else { DBG_PRINT( "EGL_GBM.Display drmSetMaster fd %d: OK\n", drm->fd); } #endif resources = drmModeGetResources(drm->fd); if ( NULL == resources ) { ERR_PRINT("EGL_GBM.Display drmModeGetResources failed on module %s: %s\n", module_used, strerror(errno)); goto error; } if( verbose ) { for (i = 0; i < resources->count_connectors; i++) { drmModeConnector * c = drmModeGetConnector(drm->fd, resources->connectors[i]); int chosen = DRM_MODE_CONNECTED == c->connection; ERR_PRINT( "EGL_GBM.Display Connector %d/%d chosen %d: id[con 0x%x, enc 0x%x], type %d[id 0x%x], connection %d, dim %dx%x mm, modes %d, encoders %d\n", i, resources->count_connectors, chosen, c->connector_id, c->encoder_id, c->connector_type, c->connector_type_id, c->connection, c->mmWidth, c->mmHeight, c->count_modes, c->count_encoders); drmModeFreeConnector(c); } } /* find a connected connector: */ for (i = 0; i < resources->count_connectors; i++) { drm->connector = drmModeGetConnector(drm->fd, resources->connectors[i]); if( DRM_MODE_CONNECTED == drm->connector->connection ) { break; } else { drmModeFreeConnector(drm->connector); drm->connector = NULL; } } if( i >= resources->count_connectors ) { /* we could be fancy and listen for hotplug events and wait for * a connector.. */ ERR_PRINT("EGL_GBM.Display no connected connector (connector count %d, module %s)!\n", resources->count_connectors, module_used); goto error; } /* find highest resolution mode: */ for (i = 0, j = -1, area = 0; i < drm->connector->count_modes; i++) { drmModeModeInfo *current_mode = &drm->connector->modes[i]; int current_area = current_mode->hdisplay * current_mode->vdisplay; if (current_area > area) { drm->current_mode = current_mode; area = current_area; j = i; } if( verbose ) { ERR_PRINT( "EGL_GBM.Display Mode %d/%d (max-chosen %d): clock %d, %dx%d @ %d Hz, type %d, name <%s>\n", i, drm->connector->count_modes, j, current_mode->clock, current_mode->hdisplay, current_mode->vdisplay, current_mode->vrefresh, current_mode->type, current_mode->name); } } if ( NULL == drm->current_mode ) { ERR_PRINT("EGL_GBM.Display could not find mode (module %s)!\n", module_used); goto error; } if( verbose ) { for (i = 0; i < resources->count_encoders; i++) { drmModeEncoder * e = drmModeGetEncoder(drm->fd, resources->encoders[i]); int chosen = e->encoder_id == drm->connector->encoder_id; ERR_PRINT( "EGL_GBM.Display Encoder %d/%d chosen %d: id 0x%x, type %d, crtc_id 0x%x, possible[crtcs %d, clones %d]\n", i, resources->count_encoders, chosen, e->encoder_id, e->encoder_type, e->crtc_id, e->possible_crtcs, e->possible_clones); drmModeFreeEncoder(e); } } /* find encoder: */ for (i = 0; i < resources->count_encoders; i++) { drm->encoder = drmModeGetEncoder(drm->fd, resources->encoders[i]); if( drm->encoder->encoder_id == drm->connector->encoder_id ) { break; } else { drmModeFreeEncoder(drm->encoder); drm->encoder = NULL; } } if ( i >= resources->count_encoders ) { ERR_PRINT("EGL_GBM.Display no encoder (module %s)!\n", module_used); goto error; } for (i = 0; i < resources->count_crtcs; i++) { if (resources->crtcs[i] == drm->encoder->crtc_id) { drm->crtc_index = i; break; } } drmModeFreeResources(resources); resources = NULL; if( verbose ) { DBG_PRINT( "EGL_GBM.Display initDrm end.X0 OK: fd %d, enc_id 0x%x, crtc_id 0x%x, conn_id 0x%x, curMode %s\n", drm->fd, drm->encoder->encoder_id, drm->encoder->crtc_id, drm->connector->connector_id, drm->current_mode->name); } // drm->crtc_id = encoder->crtc_id; // drm->connector_id = connector->connector_id; return drm; error: if( verbose ) { DBG_PRINT( "EGL_GBM.Display initDrm end.X2 ERROR\n"); } drmModeFreeResources(resources); resources = NULL; freeDrm(drm); return NULL; } static int match_config_to_visual(EGLDisplay egl_display, EGLint visual_id, EGLConfig *configs, int count) { int i; ERR_PRINT("match_config_to_visual: visual_id 0x%x\n", visual_id); for (i = 0; i < count; ++i) { EGLint id; if (!eglGetConfigAttrib(egl_display, configs[i], EGL_NATIVE_VISUAL_ID, &id)) continue; if (id == visual_id) return i; } return -1; } static EGLConfig egl_choose_config(EGLDisplay egl_display, EGLint visual_id) { EGLint count = 0; EGLint matched = 0; EGLConfig *configs; EGLConfig res = NULL; int config_index = -1; EGLint n; EGLConfig config; static const EGLint attribs[] = { EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_RED_SIZE, 8, EGL_GREEN_SIZE, 8, EGL_BLUE_SIZE, 8, // EGL_ALPHA_SIZE, 0, EGL_DEPTH_SIZE, 16, // EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT_KHR, EGL_NONE }; ERR_PRINT("egl_choose_config: visual_id 0x%x\n", visual_id); if (!eglGetConfigs(egl_display, NULL, 0, &count) || count < 1) { ERR_PRINT("No EGL configs to choose from.\n"); return NULL; } configs = calloc(count, sizeof(EGLConfig)); if (!configs) { return NULL; } if (!eglChooseConfig(egl_display, attribs, configs, count, &matched) || !matched) { ERR_PRINT("No EGL configs with appropriate attributes.\n"); goto out; } if (!visual_id) { config_index = 0; } if (config_index == -1) { config_index = match_config_to_visual(egl_display, visual_id, configs, matched); } if (config_index != -1) { EGLint v; res = configs[config_index]; if (eglGetConfigAttrib(egl_display, res, EGL_CONFIG_ID, &v)) { ERR_PRINT("eglConfig[vid 0x%x]: cfgID 0x%x\n", visual_id, v); } if (eglGetConfigAttrib(egl_display, res, EGL_RENDERABLE_TYPE, &v)) { ERR_PRINT(".. EGL_RENDERABLE_TYPE 0x%x\n", v); } if (eglGetConfigAttrib(egl_display, res, EGL_RED_SIZE, &v)) { ERR_PRINT(".. EGL_RED_SIZE 0x%x\n", v); } if (eglGetConfigAttrib(egl_display, res, EGL_GREEN_SIZE, &v)) { ERR_PRINT(".. EGL_GREEN_SIZE 0x%x\n", v); } if (eglGetConfigAttrib(egl_display, res, EGL_BLUE_SIZE, &v)) { ERR_PRINT(".. EGL_BLUE_SIZE 0x%x\n", v); } if (eglGetConfigAttrib(egl_display, res, EGL_ALPHA_SIZE, &v)) { ERR_PRINT(".. EGL_ALPHA_SIZE 0x%x\n", v); } if (eglGetConfigAttrib(egl_display, res, EGL_STENCIL_SIZE, &v)) { ERR_PRINT(".. EGL_STENCIL_SIZE 0x%x\n", v); } if (eglGetConfigAttrib(egl_display, res, EGL_DEPTH_SIZE, &v)) { ERR_PRINT(".. EGL_DEPTH_SIZE 0x%x\n", v); } } out: free(configs); ERR_PRINT("eglConfig[vid 0x%x]: config %p\n", visual_id, (void*)res); return res; } static EGLDisplay getPlatformEGLDisplay(struct gbm_device * gbmDevice) { PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display = NULL; get_platform_display = (void *) eglGetProcAddress("eglGetPlatformDisplayEXT"); assert(get_platform_display != NULL); return get_platform_display(EGL_PLATFORM_GBM_KHR, gbmDevice, NULL); } WEAK uint64_t gbm_bo_get_modifier(struct gbm_bo *bo); WEAK int gbm_bo_get_plane_count(struct gbm_bo *bo); WEAK uint32_t gbm_bo_get_stride_for_plane(struct gbm_bo *bo, int plane); WEAK uint32_t gbm_bo_get_offset(struct gbm_bo *bo, int plane); typedef struct { struct gbm_bo *bo; uint32_t fb_id; } DRM_FB; static void page_flip_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec, void *data) { /* suppress 'unused parameter' warnings */ (void)fd, (void)frame, (void)sec, (void)usec; int *waiting_for_flip = data; *waiting_for_flip = 0; } static drmEventContext drm_event_ctx = { .version = DRM_EVENT_CONTEXT_VERSION, .page_flip_handler = page_flip_handler, }; static void drm_fb_destroy_callback(struct gbm_bo *bo, void *data) { struct gbm_device * gbmDev = gbm_bo_get_device(bo); int drm_fd = gbm_device_get_fd(gbmDev); DRM_FB *fb = data; if (fb->fb_id) drmModeRmFB(drm_fd, fb->fb_id); free(fb); } static DRM_FB * drm_fb_get_from_bo2(int drmFd, struct gbm_bo *bo) { DRM_FB *fb = gbm_bo_get_user_data(bo); uint32_t width, height, format, strides[4] = {0}, handles[4] = {0}, offsets[4] = {0}, flags = 0; int ret = -1; if (fb) return fb; fb = calloc(1, sizeof *fb); fb->bo = bo; width = gbm_bo_get_width(bo); height = gbm_bo_get_height(bo); format = gbm_bo_get_format(bo); if (gbm_bo_get_modifier && gbm_bo_get_plane_count && gbm_bo_get_stride_for_plane && gbm_bo_get_offset) { uint64_t modifiers[4] = {0}; modifiers[0] = gbm_bo_get_modifier(bo); const int num_planes = gbm_bo_get_plane_count(bo); for (int i = 0; i < num_planes; i++) { strides[i] = gbm_bo_get_stride_for_plane(bo, i); handles[i] = gbm_bo_get_handle(bo).u32; offsets[i] = gbm_bo_get_offset(bo, i); modifiers[i] = modifiers[0]; } if (modifiers[0]) { flags = DRM_MODE_FB_MODIFIERS; DBG_PRINT("Using modifier %" PRIx64 "\n", modifiers[0]); } ret = drmModeAddFB2WithModifiers(drmFd, width, height, format, handles, strides, offsets, modifiers, &fb->fb_id, flags); if(ret) { ERR_PRINT("drmModeAddFB2WithModifiers failed!\n"); } else { ERR_PRINT("drmModeAddFB2WithModifiers OK!\n"); } } if (ret) { memcpy(handles, (uint32_t [4]){gbm_bo_get_handle(bo).u32,0,0,0}, 16); memcpy(strides, (uint32_t [4]){gbm_bo_get_stride(bo),0,0,0}, 16); memset(offsets, 0, 16); ret = drmModeAddFB2(drmFd, width, height, format, handles, strides, offsets, &fb->fb_id, 0); if(ret) { ERR_PRINT("drmModeAddFB2 failed!\n"); } else { ERR_PRINT("drmModeAddFB2 OK!\n"); } } if (ret) { ERR_PRINT("failed to create fb: %s\n", strerror(errno)); free(fb); return NULL; } gbm_bo_set_user_data(bo, fb, drm_fb_destroy_callback); return fb; } static DRM_FB * drm_fb_get_from_bo(int drmFd, struct gbm_bo *bo) { DRM_FB *fb = gbm_bo_get_user_data(bo); uint32_t width, height, stride, handle; int ret; if (fb) { return fb; } fb = calloc(1, sizeof *fb); fb->bo = bo; width = gbm_bo_get_width(bo); height = gbm_bo_get_height(bo); stride = gbm_bo_get_stride(bo); handle = gbm_bo_get_handle(bo).u32; ret = drmModeAddFB(drmFd, width, height, 24, 32, stride, handle, &fb->fb_id); if (ret) { ERR_PRINT("failed to create fb: %s\n", strerror(errno)); free(fb); return NULL; } else { ERR_PRINT("drmModeAddFB OK!\n"); } gbm_bo_set_user_data(bo, fb, drm_fb_destroy_callback); return fb; } // #define USE_SURFACELESS 1 #ifdef USE_SURFACELESS #warning Using KHR_SURFACELESS #endif /* USE_SURFACELESS */ // #define USE_EGL_DEFAULT_DISPLAY 1 #ifdef USE_EGL_DEFAULT_DISPLAY #warning Using EGL_DEFAULT_DISPLAY causing issues with Mesa GBM #endif /* USE_EGL_DEFAULT_DISPLAY */ #if defined(USE_EGL_DEFAULT_DISPLAY) && !defined(USE_SURFACELESS) #error USE_EGL_DEFAULT_DISPLAY requires USE_SURFACELESS #endif int main(int argc, char *argv[]) { fd_set fds; DRM_HANDLE *drm = NULL; struct gbm_device * gbmDevice = NULL; uint32_t visualID = GBM_FORMAT_XRGB8888; struct gbm_surface *gbmSurface = NULL; EGLDisplay eglDisplay = NULL; EGLint major, minor; EGLConfig eglConfig = NULL; EGLSurface eglSurface = NULL; EGLContext glContext = NULL; struct gbm_bo *bo = NULL; DRM_FB * fb = NULL; uint32_t i = 0; int ret; static const EGLint context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE }; #ifdef USE_SURFACELESS ERR_PRINT("Compiled _with__ USE_SURFACELESS\n"); #else ERR_PRINT("Compiled without USE_SURFACELESS\n"); #endif /* USE_SURFACELESS */ #ifdef USE_EGL_DEFAULT_DISPLAY ERR_PRINT("Compiled _with__ USE_EGL_DEFAULT_DISPLAY\n"); #else ERR_PRINT("Compiled without USE_EGL_DEFAULT_DISPLAY\n"); #endif /* USE_EGL_DEFAULT_DISPLAY */ drm = initDrm(1); if (NULL == drm) { ERR_PRINT("failed to initialize DRM\n"); return -1; } { ERR_PRINT("JOGL SharedResource GL Scanning Emulation.START\n"); #ifdef USE_EGL_DEFAULT_DISPLAY eglDisplay = getPlatformEGLDisplay(EGL_DEFAULT_DISPLAY); #else /* USE_EGL_DEFAULT_DISPLAY */ gbmDevice = gbm_create_device(drm->fd); if (NULL == gbmDevice) { ERR_PRINT("failed to create GBM Device\n"); return -1; } eglDisplay = getPlatformEGLDisplay(gbmDevice); #endif /* USE_EGL_DEFAULT_DISPLAY */ if (!eglInitialize(eglDisplay, &major, &minor)) { ERR_PRINT("failed to initialize\n"); return -1; } eglConfig = egl_choose_config(eglDisplay, visualID); if (NULL == eglConfig) { ERR_PRINT("failed to chose EGLConfig\n"); return ret; } #ifndef USE_SURFACELESS #ifdef USE_EGL_DEFAULT_DISPLAY #error USE_EGL_DEFAULT_DISPLAY requires USE_SURFACELESS #endif gbmSurface = gbm_surface_create(gbmDevice, drm->current_mode->hdisplay, drm->current_mode->vdisplay, visualID, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING); if (NULL == gbmSurface) { ERR_PRINT("failed to create GBM Surface\n"); return -1; } eglSurface = eglCreateWindowSurface(eglDisplay, eglConfig, gbmSurface, NULL); if (eglSurface == EGL_NO_SURFACE) { ERR_PRINT("failed to create egl surface\n"); return -1; } #endif /* USE_SURFACELESS */ if (!eglBindAPI(EGL_OPENGL_ES_API)) { ERR_PRINT("failed to bind api EGL_OPENGL_ES_API\n"); return -1; } glContext = eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, context_attribs); if (glContext == NULL) { ERR_PRINT("failed to create glContext\n"); return -1; } #ifndef USE_SURFACELESS eglMakeCurrent(eglDisplay, eglSurface, eglSurface, glContext); #else /* USE_SURFACELESS */ eglMakeCurrent(eglDisplay, NULL, NULL, glContext); #endif /* USE_SURFACELESS */ ERR_PRINT("GL Version.0 \"%s\"\n", glGetString(GL_VERSION)); ERR_PRINT("GL Renderer.0 \"%s\"\n", glGetString(GL_RENDERER)); eglMakeCurrent(eglDisplay, NULL, NULL, NULL); eglDestroyContext(eglDisplay, glContext); #ifndef USE_SURFACELESS eglDestroySurface(eglDisplay, eglSurface); gbm_surface_destroy(gbmSurface); #endif /* USE_SURFACELESS */ eglTerminate(eglDisplay); #ifndef USE_EGL_DEFAULT_DISPLAY gbm_device_destroy(gbmDevice); #endif /* USE_EGL_DEFAULT_DISPLAY */ glContext = NULL; eglConfig = NULL; eglSurface = NULL; gbmSurface = NULL; eglDisplay = NULL; gbmDevice = NULL; ERR_PRINT("JOGL SharedResource GL Scanning Emulation.END\n"); } FD_ZERO(&fds); FD_SET(0, &fds); FD_SET(drm->fd, &fds); gbmDevice = gbm_create_device(drm->fd); if (NULL == gbmDevice) { ERR_PRINT("failed to create GBM Device\n"); return -1; } { eglDisplay = getPlatformEGLDisplay(gbmDevice); if (!eglInitialize(eglDisplay, &major, &minor)) { ERR_PRINT("failed to initialize\n"); return -1; } ERR_PRINT("Using display %p with EGL version %d.%d\n", eglDisplay, major, minor); ERR_PRINT("EGL Version \"%s\"\n", eglQueryString(eglDisplay, EGL_VERSION)); ERR_PRINT("EGL Vendor \"%s\"\n", eglQueryString(eglDisplay, EGL_VENDOR)); // ERR_PRINT("EGL Extensions \"%s\"\n", eglQueryString(eglDisplay, EGL_EXTENSIONS)); } eglConfig = egl_choose_config(eglDisplay, visualID); if (NULL == eglConfig) { ERR_PRINT("failed to chose EGLConfig\n"); return ret; } gbmSurface = gbm_surface_create(gbmDevice, drm->current_mode->hdisplay, drm->current_mode->vdisplay, visualID, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING); if (NULL == gbmSurface) { ERR_PRINT("failed to create GBM Surface\n"); return -1; } eglSurface = eglCreateWindowSurface(eglDisplay, eglConfig, gbmSurface, NULL); if (eglSurface == EGL_NO_SURFACE) { ERR_PRINT("failed to create egl surface\n"); return -1; } if (!eglBindAPI(EGL_OPENGL_ES_API)) { ERR_PRINT("failed to bind api EGL_OPENGL_ES_API\n"); return -1; } glContext = eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, context_attribs); if (glContext == NULL) { ERR_PRINT("failed to create glContext\n"); return -1; } /* connect the glContext to the surface */ eglMakeCurrent(eglDisplay, eglSurface, eglSurface, glContext); ERR_PRINT("GL Version \"%s\"\n", glGetString(GL_VERSION)); ERR_PRINT("GL Renderer \"%s\"\n", glGetString(GL_RENDERER)); // ERR_PRINT("GL Extensions: \"%s\"\n", glGetString(GL_EXTENSIONS)); /* clear the color buffer */ glClearColor(0.5, 0.5, 0.5, 1.0); glClear(GL_COLOR_BUFFER_BIT); eglSwapBuffers(eglDisplay, eglSurface); bo = gbm_surface_lock_front_buffer(gbmSurface); fb = drm_fb_get_from_bo(drm->fd, bo); if (!fb) { ERR_PRINT("Failed to get a new framebuffer BO\n"); return -1; } /* set mode: */ ret = drmModeSetCrtc(drm->fd, drm->encoder->crtc_id, fb->fb_id, 0, 0, &drm->connector->connector_id, 1, drm->current_mode); /** int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId, uint32_t x, uint32_t y, uint32_t *connectors, int count, drmModeModeInfoPtr mode); */ if (ret) { ERR_PRINT("drmModeSetCrtc failed to set mode: fd %d, enc_id 0x%x, crtc_id 0x%x, fb_id 0x%x, conn_id 0x%x, curMode %s: %d %s\n", drm->fd, drm->encoder->encoder_id, drm->encoder->crtc_id, fb->fb_id, drm->connector->connector_id, drm->current_mode->name, ret, strerror(errno)); return -1; } DBG_PRINT( "drmModeSetCrtc OK bo %p, fd %d, enc_id 0x%x, crtc_id 0x%x, fb_id 0x%x, conn_id 0x%x, curMode %s\n", bo, drm->fd, drm->encoder->encoder_id, drm->encoder->crtc_id, fb->fb_id, drm->connector->connector_id, drm->current_mode->name); while (1) { struct gbm_bo *next_bo; int waiting_for_flip = 1; if( ++i > 255 ) { i = 0; } glClearColor(0.2f, 0.3f, (float)i/255.0f, 1.0f); glClear(GL_COLOR_BUFFER_BIT); eglSwapBuffers(eglDisplay, eglSurface); next_bo = gbm_surface_lock_front_buffer(gbmSurface); fb = drm_fb_get_from_bo(drm->fd, next_bo); if (!fb) { ERR_PRINT("Failed to get a new framebuffer next_bo\n"); return -1; } /* * Here you could also update drm plane layers if you want * hw composition */ ret = drmModePageFlip(drm->fd, drm->encoder->crtc_id, fb->fb_id, DRM_MODE_PAGE_FLIP_EVENT, &waiting_for_flip); if (ret) { ERR_PRINT("drmModePageFlip failed to queue page flip: fd %d, enc_id 0x%x, crtc_id 0x%x, fb_id 0x%x, conn_id 0x%x, curMode %s: %p -> %p: %d %s\n", drm->fd, drm->encoder->encoder_id, drm->encoder->crtc_id, fb->fb_id, drm->connector->connector_id, drm->current_mode->name, bo, next_bo, ret, strerror(errno)); return -1; } while (waiting_for_flip) { ret = select(drm->fd + 1, &fds, NULL, NULL, NULL); if (ret < 0) { ERR_PRINT("select err: %s\n", strerror(errno)); return ret; } else if (ret == 0) { ERR_PRINT("select timeout!\n"); return -1; } else if (FD_ISSET(0, &fds)) { ERR_PRINT("user interrupted!\n"); break; } drmHandleEvent(drm->fd, &drm_event_ctx); } /* release last buffer to render on again: */ gbm_surface_release_buffer(gbmSurface, bo); bo = next_bo; } return ret; }