src/video/kmsdrm/SDL_kmsdrmopengles.c
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11174:3767cdd2d64b 11175:cbc6a8a5b701
       
     1 /*
       
     2   Simple DirectMedia Layer
       
     3   Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
       
     4 
       
     5   This software is provided 'as-is', without any express or implied
       
     6   warranty.  In no event will the authors be held liable for any damages
       
     7   arising from the use of this software.
       
     8 
       
     9   Permission is granted to anyone to use this software for any purpose,
       
    10   including commercial applications, and to alter it and redistribute it
       
    11   freely, subject to the following restrictions:
       
    12 
       
    13   1. The origin of this software must not be misrepresented; you must not
       
    14      claim that you wrote the original software. If you use this software
       
    15      in a product, an acknowledgment in the product documentation would be
       
    16      appreciated but is not required.
       
    17   2. Altered source versions must be plainly marked as such, and must not be
       
    18      misrepresented as being the original software.
       
    19   3. This notice may not be removed or altered from any source distribution.
       
    20 */
       
    21 #include "../../SDL_internal.h"
       
    22 
       
    23 #if SDL_VIDEO_DRIVER_KMSDRM && SDL_VIDEO_OPENGL_EGL
       
    24 
       
    25 #include "SDL_log.h"
       
    26 
       
    27 #include "SDL_kmsdrmvideo.h"
       
    28 #include "SDL_kmsdrmopengles.h"
       
    29 #include "SDL_kmsdrmdyn.h"
       
    30 
       
    31 #ifndef EGL_PLATFORM_GBM_MESA
       
    32 #define EGL_PLATFORM_GBM_MESA 0x31D7
       
    33 #endif
       
    34 
       
    35 /* EGL implementation of SDL OpenGL support */
       
    36 
       
    37 int
       
    38 KMSDRM_GLES_LoadLibrary(_THIS, const char *path) {
       
    39     return SDL_EGL_LoadLibrary(_this, path, ((SDL_VideoData *)_this->driverdata)->gbm, EGL_PLATFORM_GBM_MESA);
       
    40 }
       
    41 
       
    42 SDL_EGL_CreateContext_impl(KMSDRM)
       
    43 
       
    44 int KMSDRM_GLES_SetSwapInterval(_THIS, int interval) {
       
    45     if (!_this->egl_data) {
       
    46         return SDL_SetError("EGL not initialized");
       
    47     }
       
    48 
       
    49     if (interval == 0 || interval == 1) {
       
    50         _this->egl_data->egl_swapinterval = interval;
       
    51     } else {
       
    52         return SDL_SetError("Only swap intervals of 0 or 1 are supported");
       
    53     }
       
    54 
       
    55     return 0;
       
    56 }
       
    57 
       
    58 int
       
    59 KMSDRM_GLES_SwapWindow(_THIS, SDL_Window * window) {
       
    60     SDL_WindowData *wdata = ((SDL_WindowData *) window->driverdata);
       
    61     SDL_DisplayData *displaydata = (SDL_DisplayData *) SDL_GetDisplayForWindow(window)->driverdata;
       
    62     SDL_VideoData *vdata = ((SDL_VideoData *)_this->driverdata);
       
    63     KMSDRM_FBInfo *fb_info;
       
    64     int ret;
       
    65 
       
    66     /* Do we still need to wait for a flip? */
       
    67     int timeout = 0;
       
    68     if (_this->egl_data->egl_swapinterval == 1) {
       
    69         timeout = -1;
       
    70     }
       
    71     if (!KMSDRM_WaitPageFlip(_this, wdata, timeout)) {
       
    72         return 0;
       
    73     }
       
    74 
       
    75     /* Release previously displayed buffer (which is now the backbuffer) and lock a new one */
       
    76     if (wdata->locked_bo != NULL) {
       
    77         KMSDRM_gbm_surface_release_buffer(wdata->gs, wdata->locked_bo);
       
    78         /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Released GBM surface %p", (void *)wdata->locked_bo); */
       
    79         wdata->locked_bo = NULL;
       
    80     }
       
    81 
       
    82     if (!(_this->egl_data->eglSwapBuffers(_this->egl_data->egl_display, wdata->egl_surface))) {
       
    83         SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "eglSwapBuffers failed.");
       
    84         return 0;
       
    85     }
       
    86 
       
    87     wdata->locked_bo = KMSDRM_gbm_surface_lock_front_buffer(wdata->gs);
       
    88     if (wdata->locked_bo == NULL) {
       
    89         SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not lock GBM surface front buffer");
       
    90         return 0;
       
    91     /* } else {
       
    92         SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "Locked GBM surface %p", (void *)wdata->locked_bo); */
       
    93     }
       
    94 
       
    95     fb_info = KMSDRM_FBFromBO(_this, wdata->locked_bo);
       
    96     if (_this->egl_data->egl_swapinterval == 0) {
       
    97         /* Swap buffers instantly, possible tearing */
       
    98         /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "drmModeSetCrtc(%d, %u, %u, 0, 0, &%u, 1, &%ux%u@%u)",
       
    99             vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id, vdata->saved_conn_id,
       
   100             displaydata->cur_mode.hdisplay, displaydata->cur_mode.vdisplay, displaydata->cur_mode.vrefresh); */
       
   101         ret = KMSDRM_drmModeSetCrtc(vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id,
       
   102                                     0, 0, &vdata->saved_conn_id, 1, &displaydata->cur_mode);
       
   103         if(ret != 0) {
       
   104             SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not pageflip with drmModeSetCrtc: %d", ret);
       
   105         }
       
   106     } else {
       
   107         /* Queue page flip at vsync */
       
   108         /* SDL_LogDebug(SDL_LOG_CATEGORY_VIDEO, "drmModePageFlip(%d, %u, %u, DRM_MODE_PAGE_FLIP_EVENT, &wdata->waiting_for_flip)",
       
   109             vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id); */
       
   110         ret = KMSDRM_drmModePageFlip(vdata->drm_fd, displaydata->crtc_id, fb_info->fb_id,
       
   111                                      DRM_MODE_PAGE_FLIP_EVENT, &wdata->waiting_for_flip);
       
   112         if (ret == 0) {
       
   113             wdata->waiting_for_flip = SDL_TRUE;
       
   114         } else {
       
   115             SDL_LogError(SDL_LOG_CATEGORY_VIDEO, "Could not queue pageflip: %d", ret);
       
   116         }
       
   117     }
       
   118 
       
   119     return 0;
       
   120 }
       
   121 
       
   122 SDL_EGL_MakeCurrent_impl(KMSDRM)
       
   123 
       
   124 #endif /* SDL_VIDEO_DRIVER_KMSDRM && SDL_VIDEO_OPENGL_EGL */
       
   125 
       
   126 /* vi: set ts=4 sw=4 expandtab: */