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https://github.com/RaySollium99/libpicofe.git
synced 2025-09-05 06:47:45 -04:00
video fbdev: expand to support fb resize and stuff
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@884 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz
parent
d747e9d65e
commit
b6b7d1b1c5
2 changed files with 120 additions and 62 deletions
177
linux/fbdev.c
177
linux/fbdev.c
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@ -21,8 +21,9 @@ struct vout_fbdev {
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struct fb_var_screeninfo fbvar_old;
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struct fb_var_screeninfo fbvar_new;
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int buffer_write;
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void *buffers[FBDEV_MAX_BUFFERS];
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int fb_size;
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int buffer_count;
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int top_border, bottom_border;
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};
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void *vout_fbdev_flip(struct vout_fbdev *fbdev)
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@ -37,11 +38,13 @@ void *vout_fbdev_flip(struct vout_fbdev *fbdev)
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if (fbdev->buffer_write >= fbdev->buffer_count)
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fbdev->buffer_write = 0;
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fbdev->fbvar_new.yoffset = fbdev->fbvar_old.yres * draw_buf;
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fbdev->fbvar_new.yoffset =
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(fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf +
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fbdev->top_border;
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ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
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return fbdev->buffers[fbdev->buffer_write];
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return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
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}
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void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
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@ -50,15 +53,108 @@ void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
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ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg);
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}
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int vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h,
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int left_border, int right_border, int top_border, int bottom_border, int no_dblbuf)
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{
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int w_total = left_border + w + right_border;
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int h_total = top_border + h + bottom_border;
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size_t mem_size;
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int ret;
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// unblank to be sure the mode is really accepted
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ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK);
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if (fbdev->fbvar_new.bits_per_pixel != 16 ||
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w != fbdev->fbvar_new.xres ||
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h != fbdev->fbvar_new.yres ||
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w_total != fbdev->fbvar_new.xres_virtual ||
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h_total > fbdev->fbvar_new.yres_virtual ||
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left_border != fbdev->fbvar_new.xoffset) {
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fbdev->fbvar_new.xres = w;
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fbdev->fbvar_new.yres = h;
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fbdev->fbvar_new.xres_virtual = w_total;
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fbdev->fbvar_new.yres_virtual = h_total;
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fbdev->fbvar_new.xoffset = left_border;
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fbdev->fbvar_new.bits_per_pixel = 16;
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printf(" switching to %dx%d@16\n", w, h);
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ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
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if (ret == -1) {
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perror("FBIOPUT_VSCREENINFO ioctl");
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return -1;
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}
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}
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fbdev->buffer_count = FBDEV_MAX_BUFFERS; // be optimistic
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if (no_dblbuf)
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fbdev->buffer_count = 1;
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if (fbdev->fbvar_new.yres_virtual < h_total * fbdev->buffer_count) {
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fbdev->fbvar_new.yres_virtual = h_total * fbdev->buffer_count;
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ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
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if (ret == -1) {
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fbdev->buffer_count = 1;
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fprintf(stderr, "Warning: failed to increase virtual resolution, "
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"doublebuffering disabled\n");
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}
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}
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fbdev->fb_size = w_total * h_total * 2;
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fbdev->top_border = top_border;
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fbdev->bottom_border = bottom_border;
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mem_size = fbdev->fb_size * fbdev->buffer_count;
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if (fbdev->mem_size >= mem_size)
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return 0;
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if (fbdev->mem != NULL)
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munmap(fbdev->mem, fbdev->mem_size);
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fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
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if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
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fprintf(stderr, "Warning: can't map %zd bytes, doublebuffering disabled\n", fbdev->mem_size);
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fbdev->buffer_count = 1;
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mem_size = fbdev->fb_size;
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fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
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}
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if (fbdev->mem == MAP_FAILED) {
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fbdev->mem = NULL;
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fbdev->mem_size = 0;
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perror("mmap framebuffer");
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return -1;
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}
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fbdev->mem_size = mem_size;
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return 0;
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}
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void vout_fbdev_clear(struct vout_fbdev *fbdev)
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{
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memset(fbdev->mem, 0, fbdev->mem_size);
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}
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void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count)
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{
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int stride = fbdev->fbvar_new.xres * fbdev->fbvar_new.bits_per_pixel / 8;
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int i;
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if (y + count > fbdev->fbvar_new.yres)
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count = fbdev->fbvar_new.yres - y;
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if (y >= 0 && count > 0)
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for (i = 0; i < fbdev->buffer_count; i++)
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memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count);
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}
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int vout_fbdev_get_fd(struct vout_fbdev *fbdev)
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{
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return fbdev->fd;
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}
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struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int no_dblbuf)
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{
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struct vout_fbdev *fbdev;
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int i, ret;
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int req_w, req_h;
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int ret;
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fbdev = calloc(1, sizeof(*fbdev));
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if (fbdev == NULL)
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@ -78,49 +174,24 @@ struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int n
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}
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fbdev->fbvar_new = fbdev->fbvar_old;
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printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_old.xres, fbdev->fbvar_old.yres,
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fbdev->fbvar_old.bits_per_pixel);
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*w = fbdev->fbvar_old.xres;
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*h = fbdev->fbvar_old.yres;
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fbdev->buffer_count = FBDEV_MAX_BUFFERS; // be optimistic
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if (no_dblbuf)
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fbdev->buffer_count = 1;
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if (fbdev->fbvar_new.bits_per_pixel != 16) {
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printf(" switching to 16bpp\n");
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fbdev->fbvar_new.bits_per_pixel = 16;
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ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
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if (ret == -1) {
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perror("FBIOPUT_VSCREENINFO ioctl");
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goto fail;
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}
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}
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req_w = fbdev->fbvar_new.xres;
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if (*w != 0)
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req_w = *w;
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req_h = fbdev->fbvar_new.yres;
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if (*h != 0)
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req_h = *h;
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if (fbdev->fbvar_new.yres_virtual < fbdev->fbvar_old.yres * fbdev->buffer_count) {
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fbdev->fbvar_new.yres_virtual = fbdev->fbvar_old.yres * fbdev->buffer_count;
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ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
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if (ret == -1) {
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fbdev->buffer_count = 1;
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fprintf(stderr, "Warning: failed to increase virtual resolution, "
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"doublebuffering disabled\n");
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}
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}
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fbdev->mem_size = *w * *h * 2 * fbdev->buffer_count;
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fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
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if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
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fprintf(stderr, "Warning: can't map %zd bytes, doublebuffering disabled\n", fbdev->mem_size);
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fbdev->mem_size = *w * *h * 2;
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fbdev->buffer_count = 1;
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fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
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}
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if (fbdev->mem == MAP_FAILED) {
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perror("mmap framebuffer");
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ret = vout_fbdev_resize(fbdev, req_w, req_h, 0, 0, 0, 0, no_dblbuf);
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if (ret != 0)
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goto fail;
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}
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printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, fbdev->fbvar_new.yres,
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fbdev->fbvar_new.bits_per_pixel);
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*w = fbdev->fbvar_new.xres;
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*h = fbdev->fbvar_new.yres;
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memset(fbdev->mem, 0, fbdev->mem_size);
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for (i = 0; i < fbdev->buffer_count; i++)
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fbdev->buffers[i] = (char *)fbdev->mem + i * *w * *h * 2;
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// some checks
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ret = 0;
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@ -130,7 +201,7 @@ struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int n
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if (fbdev->buffer_count > 1) {
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fbdev->buffer_write = 0;
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fbdev->fbvar_new.yoffset = fbdev->fbvar_old.yres * (fbdev->buffer_count - 1);
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fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1);
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ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
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if (ret != 0) {
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fbdev->buffer_count = 1;
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@ -160,21 +231,3 @@ void vout_fbdev_finish(struct vout_fbdev *fbdev)
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free(fbdev);
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}
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#if 0
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void *g_screen_ptr;
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int main()
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{
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int w, h;
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vout_fbdev_init(&w, &h);
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//while (1)
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{
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memset(g_screen_ptr, 0xff, fbdev_mem_size / 2);
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plat_video_wait_vsync();
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plat_video_flip();
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memset(g_screen_ptr, 0x00, fbdev_mem_size / 2);
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usleep(8000);
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// plat_video_wait_vsync();
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plat_video_flip();
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}
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}
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#endif
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@ -3,5 +3,10 @@ struct vout_fbdev;
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struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int no_dblbuf);
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void *vout_fbdev_flip(struct vout_fbdev *fbdev);
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void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev);
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int vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h,
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int left_border, int right_border, int top_border, int bottom_border,
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int no_dblbuf);
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void vout_fbdev_clear(struct vout_fbdev *fbdev);
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void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count);
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int vout_fbdev_get_fd(struct vout_fbdev *fbdev);
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void vout_fbdev_finish(struct vout_fbdev *fbdev);
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