From 323db7293410a1245667e01dda1514aef3327c38 Mon Sep 17 00:00:00 2001 From: notaz Date: Tue, 10 Apr 2012 00:04:15 +0000 Subject: [PATCH] fbdev: save and restore support git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@950 be3aeb3a-fb24-0410-a615-afba39da0efa --- linux/fbdev.c | 82 +++++++++++++++++++++++++++++++++++++++++++-------- linux/fbdev.h | 2 ++ linux/xenv.h | 2 +- 3 files changed, 72 insertions(+), 14 deletions(-) diff --git a/linux/fbdev.c b/linux/fbdev.c index afd5531..ec3d5c7 100644 --- a/linux/fbdev.c +++ b/linux/fbdev.c @@ -22,6 +22,8 @@ #include "fbdev.h" +#define PFX "fbdev: " + struct vout_fbdev { int fd; void *mem; @@ -32,6 +34,8 @@ struct vout_fbdev { int fb_size; int buffer_count; int top_border, bottom_border; + void *mem_saved; + size_t mem_saved_size; }; void *vout_fbdev_flip(struct vout_fbdev *fbdev) @@ -83,7 +87,7 @@ void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp, { if (fbdev->fbvar_new.bits_per_pixel != bpp || w != fbdev->fbvar_new.xres || h != fbdev->fbvar_new.yres) - printf(" switching to %dx%d@%d\n", w, h, bpp); + printf(PFX "switching to %dx%d@%d\n", w, h, bpp); fbdev->fbvar_new.xres = w; fbdev->fbvar_new.yres = h; @@ -105,12 +109,12 @@ void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp, fbdev->fbvar_new.yres_virtual = h_total; ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); if (ret == -1) { - perror("FBIOPUT_VSCREENINFO ioctl"); + perror(PFX "FBIOPUT_VSCREENINFO ioctl"); return NULL; } fbdev->buffer_count = 1; fbdev->buffer_write = 0; - fprintf(stderr, "Warning: failed to increase virtual resolution, " + fprintf(stderr, PFX "Warning: failed to increase virtual resolution, " "multibuffering disabled\n"); } @@ -129,7 +133,7 @@ void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp, fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) { - fprintf(stderr, "Warning: can't map %zd bytes, doublebuffering disabled\n", mem_size); + fprintf(stderr, PFX "Warning: can't map %zd bytes, doublebuffering disabled\n", mem_size); fbdev->buffer_count = 1; fbdev->buffer_write = 0; mem_size = fbdev->fb_size; @@ -138,7 +142,7 @@ void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp, if (fbdev->mem == MAP_FAILED) { fbdev->mem = NULL; fbdev->mem_size = 0; - perror("mmap framebuffer"); + perror(PFX "mmap framebuffer"); return NULL; } @@ -184,14 +188,14 @@ struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int b fbdev->fd = open(fbdev_name, O_RDWR); if (fbdev->fd == -1) { - fprintf(stderr, "%s: ", fbdev_name); + fprintf(stderr, PFX "%s: ", fbdev_name); perror("open"); goto fail_open; } ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old); if (ret == -1) { - perror("FBIOGET_VSCREENINFO ioctl"); + perror(PFX "FBIOGET_VSCREENINFO ioctl"); goto fail; } @@ -208,8 +212,8 @@ struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int b if (pret == NULL) goto fail; - printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, fbdev->fbvar_new.yres, - fbdev->fbvar_new.bits_per_pixel); + printf(PFX "%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, + fbdev->fbvar_new.yres, fbdev->fbvar_new.bits_per_pixel); *w = fbdev->fbvar_new.xres; *h = fbdev->fbvar_new.yres; @@ -219,7 +223,7 @@ struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int b ret = 0; ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret); if (ret != 0) - fprintf(stderr, "Warning: vsync doesn't seem to be supported\n"); + fprintf(stderr, PFX "Warning: vsync doesn't seem to be supported\n"); if (fbdev->buffer_count > 1) { fbdev->buffer_write = 0; @@ -227,7 +231,7 @@ struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int b ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new); if (ret != 0) { fbdev->buffer_count = 1; - fprintf(stderr, "Warning: can't pan display, doublebuffering disabled\n"); + fprintf(stderr, PFX "Warning: can't pan display, doublebuffering disabled\n"); } } @@ -241,14 +245,66 @@ fail_open: return NULL; } -void vout_fbdev_finish(struct vout_fbdev *fbdev) +static void vout_fbdev_release(struct vout_fbdev *fbdev) { ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old); if (fbdev->mem != MAP_FAILED) munmap(fbdev->mem, fbdev->mem_size); + fbdev->mem = NULL; +} + +int vout_fbdev_save(struct vout_fbdev *fbdev) +{ + void *tmp; + + if (fbdev == NULL || fbdev->mem == NULL || fbdev->mem == MAP_FAILED) { + fprintf(stderr, PFX "bad args for save\n"); + return -1; + } + + if (fbdev->mem_saved_size < fbdev->mem_size) { + tmp = realloc(fbdev->mem_saved, fbdev->mem_size); + if (tmp == NULL) + return -1; + fbdev->mem_saved = tmp; + } + memcpy(fbdev->mem_saved, fbdev->mem, fbdev->mem_size); + fbdev->mem_saved_size = fbdev->mem_size; + + vout_fbdev_release(fbdev); + return 0; +} + +int vout_fbdev_restore(struct vout_fbdev *fbdev) +{ + int ret; + + if (fbdev == NULL || fbdev->mem != NULL) { + fprintf(stderr, PFX "bad args/state for restore\n"); + return -1; + } + + fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); + if (fbdev->mem == MAP_FAILED) { + perror(PFX "restore: memory restore failed"); + return -1; + } + memcpy(fbdev->mem, fbdev->mem_saved, fbdev->mem_size); + + ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); + if (ret == -1) { + perror(PFX "restore: FBIOPUT_VSCREENINFO"); + return -1; + } + + return 0; +} + +void vout_fbdev_finish(struct vout_fbdev *fbdev) +{ + vout_fbdev_release(fbdev); if (fbdev->fd >= 0) close(fbdev->fd); - fbdev->mem = NULL; fbdev->fd = -1; free(fbdev); } diff --git a/linux/fbdev.h b/linux/fbdev.h index 2db9163..88cd519 100644 --- a/linux/fbdev.h +++ b/linux/fbdev.h @@ -9,4 +9,6 @@ void *vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp, void vout_fbdev_clear(struct vout_fbdev *fbdev); void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count); int vout_fbdev_get_fd(struct vout_fbdev *fbdev); +int vout_fbdev_save(struct vout_fbdev *fbdev); +int vout_fbdev_restore(struct vout_fbdev *fbdev); void vout_fbdev_finish(struct vout_fbdev *fbdev); diff --git a/linux/xenv.h b/linux/xenv.h index 005ec0a..6abda19 100644 --- a/linux/xenv.h +++ b/linux/xenv.h @@ -3,7 +3,7 @@ #define XENV_CAP_MOUSE (1<<1) /* xenv_flags specify if we need keys and mouse, - * flag is removed if input is not available */ + * on return, flag is removed if input is not available */ int xenv_init(int *xenv_flags, const char *window_title); /* read events from X, calling key_cb for key, mouseb_cb for mouse button -- 2.39.5