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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifndef SDL_kmsdrmvideo_h
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#define SDL_kmsdrmvideo_h
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#include "../SDL_sysvideo.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include <gbm.h>
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#include <EGL/egl.h>
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#ifndef DRM_FORMAT_MOD_INVALID
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#define DRM_FORMAT_MOD_INVALID 0x00ffffffffffffffULL
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#endif
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#ifndef DRM_MODE_FB_MODIFIERS
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#define DRM_MODE_FB_MODIFIERS 2
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#endif
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#ifndef DRM_MODE_PAGE_FLIP_ASYNC
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#define DRM_MODE_PAGE_FLIP_ASYNC 2
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#endif
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#ifndef DRM_MODE_OBJECT_CONNECTOR
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#define DRM_MODE_OBJECT_CONNECTOR 0xc0c0c0c0
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#endif
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#ifndef DRM_MODE_OBJECT_CRTC
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#define DRM_MODE_OBJECT_CRTC 0xcccccccc
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#endif
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#ifndef DRM_CAP_ASYNC_PAGE_FLIP
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#define DRM_CAP_ASYNC_PAGE_FLIP 7
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#endif
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#ifndef DRM_CAP_CURSOR_WIDTH
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#define DRM_CAP_CURSOR_WIDTH 8
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#endif
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#ifndef DRM_CAP_CURSOR_HEIGHT
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#define DRM_CAP_CURSOR_HEIGHT 9
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#endif
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#ifndef GBM_FORMAT_ARGB8888
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#define GBM_FORMAT_ARGB8888 ((uint32_t)('A') | ((uint32_t)('R') << 8) | ((uint32_t)('2') << 16) | ((uint32_t)('4') << 24))
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#define GBM_BO_USE_CURSOR (1 << 1)
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#define GBM_BO_USE_WRITE (1 << 3)
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#define GBM_BO_USE_LINEAR (1 << 4)
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#endif
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struct SDL_VideoData
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{
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int devindex; // device index that was passed on creation
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int drm_fd; // DRM file desc
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char devpath[32]; // DRM dev path.
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struct gbm_device *gbm_dev;
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bool video_init; // Has VideoInit succeeded?
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bool vulkan_mode; // Are we in Vulkan mode? One VK window is enough to be.
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bool async_pageflip_support; // Does the hardware support async. pageflips?
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SDL_Window **windows;
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int max_windows;
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int num_windows;
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/* Even if we have several displays, we only have to
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open 1 FD and create 1 gbm device. */
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bool gbm_init;
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};
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struct SDL_DisplayModeData
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{
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int mode_index;
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};
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struct SDL_DisplayData
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{
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drmModeConnector *connector;
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drmModeCrtc *crtc;
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drmModeModeInfo mode;
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drmModeModeInfo original_mode;
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drmModeModeInfo fullscreen_mode;
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drmModeCrtc *saved_crtc; // CRTC to restore on quit
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bool saved_vrr;
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/* DRM & GBM cursor stuff lives here, not in an SDL_Cursor's internal struct,
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because setting/unsetting up these is done on window creation/destruction,
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where we may not have an SDL_Cursor at all (so no SDL_Cursor internal).
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There's only one cursor GBM BO because we only support one cursor. */
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struct gbm_bo *cursor_bo;
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int cursor_bo_drm_fd;
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uint64_t cursor_w, cursor_h;
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bool default_cursor_init;
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};
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struct SDL_WindowData
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{
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SDL_VideoData *viddata;
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/* SDL internals expect EGL surface to be here, and in KMSDRM the GBM surface is
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what supports the EGL surface on the driver side, so all these surfaces and buffers
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are expected to be here, in the struct pointed by SDL_Window internal pointer:
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this one. So don't try to move these to dispdata! */
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struct gbm_surface *gs;
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struct gbm_bo *bo;
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struct gbm_bo *next_bo;
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bool waiting_for_flip;
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bool double_buffer;
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EGLSurface egl_surface;
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bool egl_surface_dirty;
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};
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typedef struct KMSDRM_FBInfo
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{
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int drm_fd; // DRM file desc
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uint32_t fb_id; // DRM framebuffer ID
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} KMSDRM_FBInfo;
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// Helper functions
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extern bool KMSDRM_CreateSurfaces(SDL_VideoDevice *_this, SDL_Window *window);
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extern KMSDRM_FBInfo *KMSDRM_FBFromBO(SDL_VideoDevice *_this, struct gbm_bo *bo);
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extern KMSDRM_FBInfo *KMSDRM_FBFromBO2(SDL_VideoDevice *_this, struct gbm_bo *bo, int w, int h);
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extern bool KMSDRM_WaitPageflip(SDL_VideoDevice *_this, SDL_WindowData *windata);
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/****************************************************************************/
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// SDL_VideoDevice functions declaration
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/****************************************************************************/
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// Display and window functions
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extern bool KMSDRM_VideoInit(SDL_VideoDevice *_this);
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extern void KMSDRM_VideoQuit(SDL_VideoDevice *_this);
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extern bool KMSDRM_GetDisplayModes(SDL_VideoDevice *_this, SDL_VideoDisplay *display);
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extern bool KMSDRM_SetDisplayMode(SDL_VideoDevice *_this, SDL_VideoDisplay *display, SDL_DisplayMode *mode);
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extern bool KMSDRM_CreateWindow(SDL_VideoDevice *_this, SDL_Window *window, SDL_PropertiesID create_props);
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extern void KMSDRM_SetWindowTitle(SDL_VideoDevice *_this, SDL_Window *window);
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extern bool KMSDRM_SetWindowPosition(SDL_VideoDevice *_this, SDL_Window *window);
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extern void KMSDRM_SetWindowSize(SDL_VideoDevice *_this, SDL_Window *window);
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extern SDL_FullscreenResult KMSDRM_SetWindowFullscreen(SDL_VideoDevice *_this, SDL_Window *window, SDL_VideoDisplay *_display, SDL_FullscreenOp fullscreen);
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extern void KMSDRM_ShowWindow(SDL_VideoDevice *_this, SDL_Window *window);
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extern void KMSDRM_HideWindow(SDL_VideoDevice *_this, SDL_Window *window);
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extern void KMSDRM_RaiseWindow(SDL_VideoDevice *_this, SDL_Window *window);
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extern void KMSDRM_MaximizeWindow(SDL_VideoDevice *_this, SDL_Window *window);
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extern void KMSDRM_MinimizeWindow(SDL_VideoDevice *_this, SDL_Window *window);
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extern void KMSDRM_RestoreWindow(SDL_VideoDevice *_this, SDL_Window *window);
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extern void KMSDRM_DestroyWindow(SDL_VideoDevice *_this, SDL_Window *window);
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#endif // SDL_kmsdrmvideo_h
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