Move most framebuffer handling to video_fb.c
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
94bf3dd564
commit
26162102fa
3 changed files with 252 additions and 240 deletions
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@ -119,11 +119,18 @@ typedef grub_err_t
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(*grub_video_fb_doublebuf_update_screen_t) (struct grub_video_fbrender_target *front,
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struct grub_video_fbrender_target *back);
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typedef grub_err_t (*grub_video_fb_set_page_t) (int page);
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grub_err_t
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grub_video_fb_doublebuf_blit_init (struct grub_video_fbrender_target **front,
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struct grub_video_fbrender_target **back,
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grub_video_fb_doublebuf_update_screen_t *update_screen,
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struct grub_video_mode_info mode_info,
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void *framebuf);
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grub_video_fb_setup (unsigned int mode_type, unsigned int mode_mask,
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struct grub_video_mode_info *mode_info,
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volatile void *page0_ptr,
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grub_video_fb_set_page_t set_page_in,
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volatile void *page1_ptr);
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grub_err_t
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grub_video_fb_swap_buffers (void);
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grub_err_t
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grub_video_fb_get_info_and_fini (struct grub_video_mode_info *mode_info,
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void **framebuf);
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#endif /* ! GRUB_VIDEO_FB_HEADER */
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@ -26,8 +26,16 @@
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#include <grub/bitmap.h>
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static struct grub_video_fbrender_target *render_target;
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static struct grub_video_fbrender_target *front_target;
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static struct grub_video_fbrender_target *back_target;
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struct grub_video_palette_data *palette;
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static unsigned int palette_size;
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/* For page flipping strategy. */
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static int displayed_page; /* The page # that is the front buffer. */
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static int render_page; /* The page # that is the back buffer. */
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static grub_video_fb_set_page_t set_page;
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static char *offscreen_buffer;
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static grub_video_fb_doublebuf_update_screen_t update_screen;
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/* Specify "standard" VGA palette, some video cards may
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need this and this will also be used when using RGB modes. */
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@ -58,8 +66,11 @@ grub_video_fb_init (void)
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{
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grub_free (palette);
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render_target = 0;
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front_target = 0;
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back_target = 0;
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palette = 0;
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palette_size = 0;
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set_page = 0;
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return GRUB_ERR_NONE;
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}
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@ -68,10 +79,15 @@ grub_video_fb_fini (void)
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{
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/* TODO: destroy render targets. */
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grub_free (offscreen_buffer);
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grub_free (palette);
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render_target = 0;
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front_target = 0;
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back_target = 0;
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palette = 0;
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palette_size = 0;
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set_page = 0;
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offscreen_buffer = 0;
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return GRUB_ERR_NONE;
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}
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@ -1221,6 +1237,10 @@ grub_video_fb_delete_render_target (struct grub_video_fbrender_target *target)
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grub_err_t
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grub_video_fb_set_active_render_target (struct grub_video_fbrender_target *target)
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{
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if (target == (struct grub_video_fbrender_target *)
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GRUB_VIDEO_RENDER_TARGET_DISPLAY)
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target = back_target;
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if (! target->data)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"invalid render target given");
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@ -1235,6 +1255,9 @@ grub_video_fb_get_active_render_target (struct grub_video_fbrender_target **targ
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{
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*target = render_target;
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if (*target == back_target)
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*target = (struct grub_video_fbrender_target *) GRUB_VIDEO_RENDER_TARGET_DISPLAY;
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return GRUB_ERR_NONE;
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}
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@ -1247,16 +1270,14 @@ doublebuf_blit_update_screen (struct grub_video_fbrender_target *front,
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return GRUB_ERR_NONE;
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}
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grub_err_t
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static grub_err_t
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grub_video_fb_doublebuf_blit_init (struct grub_video_fbrender_target **front,
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struct grub_video_fbrender_target **back,
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grub_video_fb_doublebuf_update_screen_t *update_screen,
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struct grub_video_mode_info mode_info,
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void *framebuf)
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{
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grub_err_t err;
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int page_size = mode_info.pitch * mode_info.height;
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void *offscreen_buffer;
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err = grub_video_fb_create_render_target_from_pointer (front, &mode_info,
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framebuf);
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@ -1283,7 +1304,200 @@ grub_video_fb_doublebuf_blit_init (struct grub_video_fbrender_target **front,
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}
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(*back)->is_allocated = 1;
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*update_screen = doublebuf_blit_update_screen;
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update_screen = doublebuf_blit_update_screen;
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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doublebuf_pageflipping_update_screen (struct grub_video_fbrender_target *front
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__attribute__ ((unused)),
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struct grub_video_fbrender_target *back
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__attribute__ ((unused)))
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{
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int new_displayed_page;
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struct grub_video_fbrender_target *target;
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grub_err_t err;
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/* Swap the page numbers in the framebuffer struct. */
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new_displayed_page = render_page;
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render_page = displayed_page;
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displayed_page = new_displayed_page;
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err = set_page (displayed_page);
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if (err)
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{
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/* Restore previous state. */
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render_page = displayed_page;
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displayed_page = new_displayed_page;
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return err;
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}
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target = back_target;
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back_target = front_target;
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front_target = target;
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if (front_target->mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP)
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grub_memcpy (back_target->data, front_target->data,
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back_target->mode_info.pitch * back_target->mode_info.height);
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err = grub_video_fb_get_active_render_target (&target);
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if (err)
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return err;
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if (render_target == back_target)
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render_target = front_target;
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else if (target == front_target)
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render_target = back_target;
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return err;
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}
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static grub_err_t
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doublebuf_pageflipping_init (struct grub_video_mode_info *mode_info,
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volatile void *page0_ptr,
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grub_video_fb_set_page_t set_page_in,
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volatile void *page1_ptr)
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{
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grub_err_t err;
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displayed_page = 0;
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render_page = 1;
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update_screen = doublebuf_pageflipping_update_screen;
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err = grub_video_fb_create_render_target_from_pointer (&front_target,
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mode_info,
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(void *) page0_ptr);
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if (err)
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return err;
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err = grub_video_fb_create_render_target_from_pointer (&back_target,
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mode_info,
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(void *) page1_ptr);
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if (err)
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{
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grub_video_fb_delete_render_target (front_target);
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return err;
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}
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/* Set the framebuffer memory data pointer and display the right page. */
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err = set_page_in (displayed_page);
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if (err)
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{
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grub_video_fb_delete_render_target (front_target);
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grub_video_fb_delete_render_target (back_target);
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return err;
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}
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set_page = set_page_in;
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return GRUB_ERR_NONE;
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}
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/* Select the best double buffering mode available. */
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grub_err_t
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grub_video_fb_setup (unsigned int mode_type, unsigned int mode_mask,
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struct grub_video_mode_info *mode_info,
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volatile void *page0_ptr,
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grub_video_fb_set_page_t set_page_in,
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volatile void *page1_ptr)
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{
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grub_err_t err;
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int updating_swap_needed;
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updating_swap_needed
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= grub_video_check_mode_flag (mode_type, mode_mask,
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GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP, 0);
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/* Do double buffering only if it's either requested or efficient. */
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if (set_page_in && grub_video_check_mode_flag (mode_type, mode_mask,
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GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
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!updating_swap_needed))
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{
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mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
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if (updating_swap_needed)
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mode_info->mode_type |= GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP;
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err = doublebuf_pageflipping_init (mode_info, page0_ptr,
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set_page_in,
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page1_ptr);
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if (!err)
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{
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render_target = back_target;
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return GRUB_ERR_NONE;
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}
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mode_info->mode_type &= ~(GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
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| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
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grub_errno = GRUB_ERR_NONE;
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}
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if (grub_video_check_mode_flag (mode_type, mode_mask,
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GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
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0))
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{
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mode_info->mode_type |= (GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
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| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
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err = grub_video_fb_doublebuf_blit_init (&front_target,
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&back_target,
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*mode_info,
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(void *) page0_ptr);
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if (!err)
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{
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render_target = back_target;
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return GRUB_ERR_NONE;
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}
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mode_info->mode_type &= ~(GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
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| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
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grub_errno = GRUB_ERR_NONE;
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}
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/* Fall back to no double buffering. */
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err = grub_video_fb_create_render_target_from_pointer (&front_target,
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mode_info,
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(void *) page0_ptr);
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if (err)
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return err;
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back_target = front_target;
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update_screen = 0;
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mode_info->mode_type &= ~GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
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render_target = back_target;
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_video_fb_swap_buffers (void)
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{
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grub_err_t err;
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if (!update_screen)
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return GRUB_ERR_NONE;
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err = update_screen (front_target, back_target);
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if (err)
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return err;
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_video_fb_get_info_and_fini (struct grub_video_mode_info *mode_info,
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void **framebuf)
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{
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grub_memcpy (mode_info, &(front_target->mode_info), sizeof (*mode_info));
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*framebuf = front_target->data;
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grub_video_fb_fini ();
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return GRUB_ERR_NONE;
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}
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@ -40,25 +40,12 @@ static grub_uint32_t last_set_mode = 3;
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static struct
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{
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struct grub_video_mode_info mode_info;
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struct grub_video_render_target *front_target;
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struct grub_video_render_target *back_target;
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unsigned int bytes_per_scan_line;
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unsigned int bytes_per_pixel;
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grub_uint32_t active_vbe_mode;
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grub_uint8_t *ptr;
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int index_color_mode;
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char *offscreen_buffer;
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grub_size_t page_size; /* The size of a page in bytes. */
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/* For page flipping strategy. */
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int displayed_page; /* The page # that is the front buffer. */
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int render_page; /* The page # that is the back buffer. */
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/* Virtual functions. */
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grub_video_fb_doublebuf_update_screen_t update_screen;
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} framebuffer;
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static grub_uint32_t initial_vbe_mode;
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@ -377,7 +364,6 @@ grub_video_vbe_fini (void)
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vbe_mode_list = NULL;
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err = grub_video_fb_fini ();
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grub_free (framebuffer.offscreen_buffer);
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return err;
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}
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@ -387,11 +373,11 @@ grub_video_vbe_fini (void)
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respectively.
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*/
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static grub_err_t
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doublebuf_pageflipping_commit (void)
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doublebuf_pageflipping_set_page (int page)
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{
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/* Tell the video adapter to display the new front page. */
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int display_start_line
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= framebuffer.mode_info.height * framebuffer.displayed_page;
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= framebuffer.mode_info.height * page;
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grub_vbe_status_t vbe_err =
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grub_vbe_bios_set_display_start (0, display_start_line);
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@ -402,164 +388,6 @@ doublebuf_pageflipping_commit (void)
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return 0;
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}
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static grub_err_t
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doublebuf_pageflipping_update_screen (struct grub_video_fbrender_target *front
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__attribute__ ((unused)),
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struct grub_video_fbrender_target *back
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__attribute__ ((unused)))
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{
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int new_displayed_page;
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struct grub_video_fbrender_target *target;
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grub_err_t err;
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/* Swap the page numbers in the framebuffer struct. */
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new_displayed_page = framebuffer.render_page;
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framebuffer.render_page = framebuffer.displayed_page;
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framebuffer.displayed_page = new_displayed_page;
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err = doublebuf_pageflipping_commit ();
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if (err)
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{
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/* Restore previous state. */
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framebuffer.render_page = framebuffer.displayed_page;
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framebuffer.displayed_page = new_displayed_page;
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return err;
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}
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if (framebuffer.mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP)
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grub_memcpy (framebuffer.ptr + framebuffer.render_page
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* framebuffer.page_size, framebuffer.ptr
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+ framebuffer.displayed_page * framebuffer.page_size,
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framebuffer.page_size);
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target = framebuffer.back_target;
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framebuffer.back_target = framebuffer.front_target;
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framebuffer.front_target = target;
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err = grub_video_fb_get_active_render_target (&target);
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if (err)
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return err;
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if (target == framebuffer.back_target)
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err = grub_video_fb_set_active_render_target (framebuffer.front_target);
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else if (target == framebuffer.front_target)
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err = grub_video_fb_set_active_render_target (framebuffer.back_target);
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return err;
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}
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static grub_err_t
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doublebuf_pageflipping_init (void)
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{
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/* Get video RAM size in bytes. */
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grub_size_t vram_size = controller_info.total_memory << 16;
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grub_err_t err;
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framebuffer.page_size =
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framebuffer.mode_info.pitch * framebuffer.mode_info.height;
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if (2 * framebuffer.page_size > vram_size)
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return grub_error (GRUB_ERR_OUT_OF_MEMORY,
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"Not enough video memory for double buffering.");
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framebuffer.displayed_page = 0;
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framebuffer.render_page = 1;
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framebuffer.update_screen = doublebuf_pageflipping_update_screen;
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err = grub_video_fb_create_render_target_from_pointer (&framebuffer.front_target, &framebuffer.mode_info, framebuffer.ptr);
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if (err)
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return err;
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err = grub_video_fb_create_render_target_from_pointer (&framebuffer.back_target, &framebuffer.mode_info, framebuffer.ptr + framebuffer.page_size);
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if (err)
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{
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grub_video_fb_delete_render_target (framebuffer.front_target);
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return err;
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}
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/* Set the framebuffer memory data pointer and display the right page. */
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err = doublebuf_pageflipping_commit ();
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if (err)
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{
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grub_video_fb_delete_render_target (framebuffer.front_target);
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grub_video_fb_delete_render_target (framebuffer.back_target);
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return err;
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}
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return GRUB_ERR_NONE;
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}
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/* Select the best double buffering mode available. */
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static grub_err_t
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double_buffering_init (unsigned int mode_type, unsigned int mode_mask)
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{
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grub_err_t err;
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int updating_swap_needed;
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updating_swap_needed
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= grub_video_check_mode_flag (mode_type, mode_mask,
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GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP, 0);
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/* Do double buffering only if it's either requested or efficient. */
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if (grub_video_check_mode_flag (mode_type, mode_mask,
|
||||
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
|
||||
!updating_swap_needed))
|
||||
{
|
||||
framebuffer.mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
|
||||
if (updating_swap_needed)
|
||||
framebuffer.mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP;
|
||||
err = doublebuf_pageflipping_init ();
|
||||
if (!err)
|
||||
return GRUB_ERR_NONE;
|
||||
|
||||
framebuffer.mode_info.mode_type
|
||||
&= ~(GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
|
||||
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
|
||||
|
||||
grub_errno = GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
if (grub_video_check_mode_flag (mode_type, mode_mask,
|
||||
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
|
||||
0))
|
||||
{
|
||||
framebuffer.mode_info.mode_type
|
||||
|= (GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
|
||||
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
|
||||
|
||||
err = grub_video_fb_doublebuf_blit_init (&framebuffer.front_target,
|
||||
&framebuffer.back_target,
|
||||
&framebuffer.update_screen,
|
||||
framebuffer.mode_info,
|
||||
framebuffer.ptr);
|
||||
|
||||
if (!err)
|
||||
return GRUB_ERR_NONE;
|
||||
|
||||
framebuffer.mode_info.mode_type
|
||||
&= ~(GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
|
||||
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
|
||||
|
||||
grub_errno = GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
/* Fall back to no double buffering. */
|
||||
err = grub_video_fb_create_render_target_from_pointer (&framebuffer.front_target, &framebuffer.mode_info, framebuffer.ptr);
|
||||
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
framebuffer.back_target = framebuffer.front_target;
|
||||
framebuffer.update_screen = 0;
|
||||
|
||||
framebuffer.mode_info.mode_type &= ~GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
|
||||
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static grub_err_t
|
||||
grub_video_vbe_setup (unsigned int width, unsigned int height,
|
||||
unsigned int mode_type, unsigned int mode_mask)
|
||||
|
|
@ -684,15 +512,24 @@ grub_video_vbe_setup (unsigned int width, unsigned int height,
|
|||
|
||||
framebuffer.mode_info.blit_format = grub_video_get_blit_format (&framebuffer.mode_info);
|
||||
|
||||
/* Set up double buffering and targets. */
|
||||
err = double_buffering_init (mode_type, mode_mask);
|
||||
if (err)
|
||||
return err;
|
||||
{
|
||||
/* Get video RAM size in bytes. */
|
||||
grub_size_t vram_size = controller_info.total_memory << 16;
|
||||
grub_size_t page_size; /* The size of a page in bytes. */
|
||||
|
||||
err = grub_video_fb_set_active_render_target (framebuffer.back_target);
|
||||
page_size = framebuffer.mode_info.pitch * framebuffer.mode_info.height;
|
||||
|
||||
if (err)
|
||||
return err;
|
||||
if (vram_size >= 2 * page_size)
|
||||
err = grub_video_fb_setup (mode_type, mode_mask,
|
||||
&framebuffer.mode_info,
|
||||
framebuffer.ptr,
|
||||
doublebuf_pageflipping_set_page,
|
||||
framebuffer.ptr + page_size);
|
||||
else
|
||||
err = grub_video_fb_setup (mode_type, mode_mask,
|
||||
&framebuffer.mode_info,
|
||||
framebuffer.ptr, 0, 0);
|
||||
}
|
||||
|
||||
/* Copy default palette to initialize emulated palette. */
|
||||
err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
|
||||
|
|
@ -723,59 +560,13 @@ grub_video_vbe_set_palette (unsigned int start, unsigned int count,
|
|||
return grub_video_fb_set_palette (start, count, palette_data);
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_video_vbe_swap_buffers (void)
|
||||
{
|
||||
grub_err_t err;
|
||||
if (!framebuffer.update_screen)
|
||||
return GRUB_ERR_NONE;
|
||||
|
||||
err = framebuffer.update_screen (framebuffer.front_target,
|
||||
framebuffer.back_target);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_video_vbe_set_active_render_target (struct grub_video_render_target *target)
|
||||
{
|
||||
if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
|
||||
target = framebuffer.back_target;
|
||||
|
||||
return grub_video_fb_set_active_render_target (target);
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_video_vbe_get_active_render_target (struct grub_video_render_target **target)
|
||||
{
|
||||
grub_err_t err;
|
||||
err = grub_video_fb_get_active_render_target (target);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
if (*target == framebuffer.back_target)
|
||||
*target = GRUB_VIDEO_RENDER_TARGET_DISPLAY;
|
||||
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_video_vbe_get_info_and_fini (struct grub_video_mode_info *mode_info,
|
||||
void **framebuf)
|
||||
{
|
||||
grub_memcpy (mode_info, &(framebuffer.mode_info), sizeof (*mode_info));
|
||||
*framebuf = (char *) framebuffer.ptr
|
||||
+ framebuffer.displayed_page * framebuffer.page_size;
|
||||
|
||||
grub_free (vbe_mode_list);
|
||||
vbe_mode_list = NULL;
|
||||
|
||||
grub_video_fb_fini ();
|
||||
grub_free (framebuffer.offscreen_buffer);
|
||||
|
||||
return GRUB_ERR_NONE;
|
||||
return grub_video_fb_get_info_and_fini (mode_info, framebuf);
|
||||
}
|
||||
|
||||
static struct grub_video_adapter grub_video_vbe_adapter =
|
||||
|
|
@ -800,11 +591,11 @@ static struct grub_video_adapter grub_video_vbe_adapter =
|
|||
.blit_bitmap = grub_video_fb_blit_bitmap,
|
||||
.blit_render_target = grub_video_fb_blit_render_target,
|
||||
.scroll = grub_video_fb_scroll,
|
||||
.swap_buffers = grub_video_vbe_swap_buffers,
|
||||
.swap_buffers = grub_video_fb_swap_buffers,
|
||||
.create_render_target = grub_video_fb_create_render_target,
|
||||
.delete_render_target = grub_video_fb_delete_render_target,
|
||||
.set_active_render_target = grub_video_vbe_set_active_render_target,
|
||||
.get_active_render_target = grub_video_vbe_get_active_render_target,
|
||||
.set_active_render_target = grub_video_fb_set_active_render_target,
|
||||
.get_active_render_target = grub_video_fb_get_active_render_target,
|
||||
|
||||
.next = 0
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in a new issue