From 207e58ef9902ef9b2ca80cd6b42eeebf9a3f0e6d Mon Sep 17 00:00:00 2001 From: notaz Date: Mon, 6 Sep 2010 11:17:13 +0000 Subject: [PATCH] video fbdev: expand to support fb resize and stuff git-svn-id: file:///home/notaz/opt/svn/PicoDrive@884 be3aeb3a-fb24-0410-a615-afba39da0efa --- platform/linux/fbdev.c | 177 ++++++++++++++++++++++++++--------------- platform/linux/fbdev.h | 5 ++ 2 files changed, 120 insertions(+), 62 deletions(-) diff --git a/platform/linux/fbdev.c b/platform/linux/fbdev.c index afcd5290..532a282a 100644 --- a/platform/linux/fbdev.c +++ b/platform/linux/fbdev.c @@ -21,8 +21,9 @@ struct vout_fbdev { struct fb_var_screeninfo fbvar_old; struct fb_var_screeninfo fbvar_new; int buffer_write; - void *buffers[FBDEV_MAX_BUFFERS]; + int fb_size; int buffer_count; + int top_border, bottom_border; }; void *vout_fbdev_flip(struct vout_fbdev *fbdev) @@ -37,11 +38,13 @@ void *vout_fbdev_flip(struct vout_fbdev *fbdev) if (fbdev->buffer_write >= fbdev->buffer_count) fbdev->buffer_write = 0; - fbdev->fbvar_new.yoffset = fbdev->fbvar_old.yres * draw_buf; + fbdev->fbvar_new.yoffset = + (fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf + + fbdev->top_border; ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new); - return fbdev->buffers[fbdev->buffer_write]; + return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write; } void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev) @@ -50,15 +53,108 @@ void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev) ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg); } +int vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, + int left_border, int right_border, int top_border, int bottom_border, int no_dblbuf) +{ + int w_total = left_border + w + right_border; + int h_total = top_border + h + bottom_border; + size_t mem_size; + int ret; + + // unblank to be sure the mode is really accepted + ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK); + + if (fbdev->fbvar_new.bits_per_pixel != 16 || + w != fbdev->fbvar_new.xres || + h != fbdev->fbvar_new.yres || + w_total != fbdev->fbvar_new.xres_virtual || + h_total > fbdev->fbvar_new.yres_virtual || + left_border != fbdev->fbvar_new.xoffset) { + fbdev->fbvar_new.xres = w; + fbdev->fbvar_new.yres = h; + fbdev->fbvar_new.xres_virtual = w_total; + fbdev->fbvar_new.yres_virtual = h_total; + fbdev->fbvar_new.xoffset = left_border; + fbdev->fbvar_new.bits_per_pixel = 16; + printf(" switching to %dx%d@16\n", w, h); + ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); + if (ret == -1) { + perror("FBIOPUT_VSCREENINFO ioctl"); + return -1; + } + } + + fbdev->buffer_count = FBDEV_MAX_BUFFERS; // be optimistic + if (no_dblbuf) + fbdev->buffer_count = 1; + + if (fbdev->fbvar_new.yres_virtual < h_total * fbdev->buffer_count) { + fbdev->fbvar_new.yres_virtual = h_total * fbdev->buffer_count; + ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); + if (ret == -1) { + fbdev->buffer_count = 1; + fprintf(stderr, "Warning: failed to increase virtual resolution, " + "doublebuffering disabled\n"); + } + } + + fbdev->fb_size = w_total * h_total * 2; + fbdev->top_border = top_border; + fbdev->bottom_border = bottom_border; + + mem_size = fbdev->fb_size * fbdev->buffer_count; + if (fbdev->mem_size >= mem_size) + return 0; + + if (fbdev->mem != NULL) + munmap(fbdev->mem, fbdev->mem_size); + + 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", fbdev->mem_size); + fbdev->buffer_count = 1; + mem_size = fbdev->fb_size; + fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); + } + if (fbdev->mem == MAP_FAILED) { + fbdev->mem = NULL; + fbdev->mem_size = 0; + perror("mmap framebuffer"); + return -1; + } + + fbdev->mem_size = mem_size; + return 0; +} + void vout_fbdev_clear(struct vout_fbdev *fbdev) { memset(fbdev->mem, 0, fbdev->mem_size); } +void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count) +{ + int stride = fbdev->fbvar_new.xres * fbdev->fbvar_new.bits_per_pixel / 8; + int i; + + if (y + count > fbdev->fbvar_new.yres) + count = fbdev->fbvar_new.yres - y; + + if (y >= 0 && count > 0) + for (i = 0; i < fbdev->buffer_count; i++) + memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count); +} + +int vout_fbdev_get_fd(struct vout_fbdev *fbdev) +{ + return fbdev->fd; +} + struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int no_dblbuf) { struct vout_fbdev *fbdev; - int i, ret; + int req_w, req_h; + int ret; fbdev = calloc(1, sizeof(*fbdev)); if (fbdev == NULL) @@ -78,49 +174,24 @@ struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int n } fbdev->fbvar_new = fbdev->fbvar_old; - printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_old.xres, fbdev->fbvar_old.yres, - fbdev->fbvar_old.bits_per_pixel); - *w = fbdev->fbvar_old.xres; - *h = fbdev->fbvar_old.yres; - fbdev->buffer_count = FBDEV_MAX_BUFFERS; // be optimistic - if (no_dblbuf) - fbdev->buffer_count = 1; - if (fbdev->fbvar_new.bits_per_pixel != 16) { - printf(" switching to 16bpp\n"); - fbdev->fbvar_new.bits_per_pixel = 16; - ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); - if (ret == -1) { - perror("FBIOPUT_VSCREENINFO ioctl"); - goto fail; - } - } - - if (fbdev->fbvar_new.yres_virtual < fbdev->fbvar_old.yres * fbdev->buffer_count) { - fbdev->fbvar_new.yres_virtual = fbdev->fbvar_old.yres * fbdev->buffer_count; - ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new); - if (ret == -1) { - fbdev->buffer_count = 1; - fprintf(stderr, "Warning: failed to increase virtual resolution, " - "doublebuffering disabled\n"); - } - } + req_w = fbdev->fbvar_new.xres; + if (*w != 0) + req_w = *w; + req_h = fbdev->fbvar_new.yres; + if (*h != 0) + req_h = *h; - fbdev->mem_size = *w * *h * 2 * fbdev->buffer_count; - fbdev->mem = mmap(0, fbdev->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", fbdev->mem_size); - fbdev->mem_size = *w * *h * 2; - fbdev->buffer_count = 1; - fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0); - } - if (fbdev->mem == MAP_FAILED) { - perror("mmap framebuffer"); + ret = vout_fbdev_resize(fbdev, req_w, req_h, 0, 0, 0, 0, no_dblbuf); + if (ret != 0) goto fail; - } + + printf("%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; + memset(fbdev->mem, 0, fbdev->mem_size); - for (i = 0; i < fbdev->buffer_count; i++) - fbdev->buffers[i] = (char *)fbdev->mem + i * *w * *h * 2; // some checks ret = 0; @@ -130,7 +201,7 @@ struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int n if (fbdev->buffer_count > 1) { fbdev->buffer_write = 0; - fbdev->fbvar_new.yoffset = fbdev->fbvar_old.yres * (fbdev->buffer_count - 1); + fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1); ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new); if (ret != 0) { fbdev->buffer_count = 1; @@ -160,21 +231,3 @@ void vout_fbdev_finish(struct vout_fbdev *fbdev) free(fbdev); } -#if 0 -void *g_screen_ptr; -int main() -{ - int w, h; - vout_fbdev_init(&w, &h); - //while (1) - { - memset(g_screen_ptr, 0xff, fbdev_mem_size / 2); - plat_video_wait_vsync(); - plat_video_flip(); - memset(g_screen_ptr, 0x00, fbdev_mem_size / 2); - usleep(8000); -// plat_video_wait_vsync(); - plat_video_flip(); - } -} -#endif diff --git a/platform/linux/fbdev.h b/platform/linux/fbdev.h index 9e5d4335..fa163aa8 100644 --- a/platform/linux/fbdev.h +++ b/platform/linux/fbdev.h @@ -3,5 +3,10 @@ struct vout_fbdev; struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int no_dblbuf); void *vout_fbdev_flip(struct vout_fbdev *fbdev); void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev); +int vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, + int left_border, int right_border, int top_border, int bottom_border, + int no_dblbuf); 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); void vout_fbdev_finish(struct vout_fbdev *fbdev); -- 2.39.5