diff options
Diffstat (limited to 'source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmopengles.c')
| -rw-r--r-- | source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmopengles.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmopengles.c b/source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmopengles.c new file mode 100644 index 0000000..fc6304d --- /dev/null +++ b/source/3rd-party/SDL2/src/video/kmsdrm/SDL_kmsdrmopengles.c @@ -0,0 +1,189 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +#include "../../SDL_internal.h" + +#if SDL_VIDEO_DRIVER_KMSDRM && SDL_VIDEO_OPENGL_EGL + +#include "SDL_log.h" + +#include "SDL_kmsdrmvideo.h" +#include "SDL_kmsdrmopengles.h" +#include "SDL_kmsdrmdyn.h" + +#ifndef EGL_PLATFORM_GBM_MESA +#define EGL_PLATFORM_GBM_MESA 0x31D7 +#endif + +/* EGL implementation of SDL OpenGL support */ + +int +KMSDRM_GLES_LoadLibrary(_THIS, const char *path) { + return SDL_EGL_LoadLibrary(_this, path, ((SDL_VideoData *)_this->driverdata)->gbm, EGL_PLATFORM_GBM_MESA); +} + +SDL_EGL_CreateContext_impl(KMSDRM) + +SDL_bool +KMSDRM_GLES_SetupCrtc(_THIS, SDL_Window * window) { + SDL_WindowData *wdata = ((SDL_WindowData *) window->driverdata); + SDL_DisplayData *displaydata = (SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata; + SDL_VideoData *vdata = ((SDL_VideoData *)_this->driverdata); + KMSDRM_FBInfo *fb_info; + + if (!(_this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, wdata->egl_surface))) { + SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "eglSwapBuffers failed on CRTC setup"); + return SDL_FALSE; + } + + wdata->crtc_bo = KMSDRM_gbm_surface_lock_front_buffer(wdata->gs); + if (wdata->crtc_bo == NULL) { + SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not lock GBM surface front buffer on CRTC setup"); + return SDL_FALSE; + } + + fb_info = KMSDRM_FBFromBO(_this, wdata->crtc_bo); + if (fb_info == NULL) { + return SDL_FALSE; + } + + if(KMSDRM_drmModeSetCrtc(vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id, + 0, 0, &vdata->saved_conn_id, 1, &displaydata->cur_mode) != 0) { + SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not set up CRTC to a GBM buffer"); + return SDL_FALSE; + + } + + wdata->crtc_ready = SDL_TRUE; + return SDL_TRUE; +} + +int KMSDRM_GLES_SetSwapInterval(_THIS, int interval) { + if (!_this->egl_data) { + return SDL_SetError("EGL not initialized"); + } + + if (interval == 0 || interval == 1) { + _this->egl_data->egl_swapinterval = interval; + } else { + return SDL_SetError("Only swap intervals of 0 or 1 are supported"); + } + + return 0; +} + +int +KMSDRM_GLES_SwapWindow(_THIS, SDL_Window * window) { + SDL_WindowData *wdata = ((SDL_WindowData *) window->driverdata); + SDL_DisplayData *displaydata = (SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata; + SDL_VideoData *vdata = ((SDL_VideoData *)_this->driverdata); + KMSDRM_FBInfo *fb_info; + int ret; + + /* Do we still need to wait for a flip? */ + int timeout = 0; + if (_this->egl_data->egl_swapinterval == 1) { + timeout = -1; + } + if (!KMSDRM_WaitPageFlip(_this, wdata, timeout)) { + return 0; + } + + /* Release previously displayed buffer (which is now the backbuffer) and lock a new one */ + if (wdata->next_bo != NULL) { + KMSDRM_gbm_surface_release_buffer(wdata->gs, wdata->current_bo); + /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Released GBM surface %p", (void *)wdata->next_bo); */ + + wdata->current_bo = wdata->next_bo; + wdata->next_bo = NULL; + } + + if (!(_this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, wdata->egl_surface))) { + SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "eglSwapBuffers failed."); + return 0; + } + + if (wdata->current_bo == NULL) { + wdata->current_bo = KMSDRM_gbm_surface_lock_front_buffer(wdata->gs); + if (wdata->current_bo == NULL) { + return 0; + } + } + + wdata->next_bo = KMSDRM_gbm_surface_lock_front_buffer(wdata->gs); + if (wdata->next_bo == NULL) { + SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not lock GBM surface front buffer"); + return 0; + /* } else { + SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Locked GBM surface %p", (void *)wdata->next_bo); */ + } + + fb_info = KMSDRM_FBFromBO(_this, wdata->next_bo); + if (fb_info == NULL) { + return 0; + } + if (_this->egl_data->egl_swapinterval == 0) { + /* Swap buffers instantly, possible tearing */ + /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "drmModeSetCrtc(%d, %u, %u, 0, 0, &%u, 1, &%ux%u@%u)", + vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id, vdata->saved_conn_id, + displaydata->cur_mode.hdisplay, displaydata->cur_mode.vdisplay, displaydata->cur_mode.vrefresh); */ + ret = KMSDRM_drmModeSetCrtc(vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id, + 0, 0, &vdata->saved_conn_id, 1, &displaydata->cur_mode); + if(ret != 0) { + SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not pageflip with drmModeSetCrtc: %d", ret); + } + } else { + /* Queue page flip at vsync */ + + /* Have we already setup the CRTC to one of the GBM buffers? Do so if we have not, + or FlipPage won't work in some cases. */ + if (!wdata->crtc_ready) { + if(!KMSDRM_GLES_SetupCrtc(_this, window)) { + SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not set up CRTC for doing vsync-ed pageflips"); + return 0; + } + } + + /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "drmModePageFlip(%d, %u, %u, DRM_MODE_PAGE_FLIP_EVENT, &wdata->waiting_for_flip)", + vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id); */ + ret = KMSDRM_drmModePageFlip(vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id, + DRM_MODE_PAGE_FLIP_EVENT, &wdata->waiting_for_flip); + if (ret == 0) { + wdata->waiting_for_flip = SDL_TRUE; + } else { + SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not queue pageflip: %d", ret); + } + + /* Wait immediately for vsync (as if we only had two buffers), for low input-lag scenarios. + Run your SDL2 program with "SDL_KMSDRM_DOUBLE_BUFFER=1 <program_name>" to enable this. */ + if (wdata->double_buffer) { + KMSDRM_WaitPageFlip(_this, wdata, -1); + } + } + + return 0; +} + +SDL_EGL_MakeCurrent_impl(KMSDRM) + +#endif /* SDL_VIDEO_DRIVER_KMSDRM && SDL_VIDEO_OPENGL_EGL */ + +/* vi: set ts=4 sw=4 expandtab: */ |