684a8eff89
* include/grub/video.h: Code cleanup.
* include/grub/i386/pc/vbe.h: Likewise.
* video/i386/pc/vbe.c: Likewise.
* video/i386/pc/vbeblit.c: Likewise.
* video/i386/pc/vbefill.c: Likewise.
* video/video.c: Likewise. Also added more comments.
378 lines
11 KiB
C
378 lines
11 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <grub/video.h>
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#include <grub/types.h>
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#include <grub/dl.h>
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/* The list of video adapters registerd to system. */
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static grub_video_adapter_t grub_video_adapter_list;
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/* Active video adapter. */
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static grub_video_adapter_t grub_video_adapter_active;
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/* Register video driver. */
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void
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grub_video_register (grub_video_adapter_t adapter)
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{
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adapter->next = grub_video_adapter_list;
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grub_video_adapter_list = adapter;
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}
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/* Unregister video driver. */
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void
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grub_video_unregister (grub_video_adapter_t adapter)
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{
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grub_video_adapter_t *p, q;
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for (p = &grub_video_adapter_list, q = *p; q; p = &(q->next), q = q->next)
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if (q == adapter)
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{
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*p = q->next;
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break;
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}
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}
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/* Iterate thru all registered video drivers. */
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void
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grub_video_iterate (int (*hook) (grub_video_adapter_t adapter))
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{
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grub_video_adapter_t p;
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for (p = grub_video_adapter_list; p; p = p->next)
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if (hook (p))
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break;
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}
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/* Setup specified video mode. */
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grub_err_t
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grub_video_setup (unsigned int width, unsigned int height,
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unsigned int mode_type)
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{
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grub_video_adapter_t p;
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/* De-activate last set video adapter. */
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if (grub_video_adapter_active)
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{
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/* Finalize adapter. */
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grub_video_adapter_active->fini ();
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if (grub_errno != GRUB_ERR_NONE)
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return grub_errno;
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/* Mark active adapter as not set. */
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grub_video_adapter_active = 0;
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}
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/* Loop thru all possible video adapter trying to find requested mode. */
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for (p = grub_video_adapter_list; p; p = p->next)
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{
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/* Try to initialize adapter, if can't skip to next. */
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p->init ();
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if (grub_errno != GRUB_ERR_NONE)
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{
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grub_errno = GRUB_ERR_NONE;
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continue;
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}
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/* Try to initialize video mode. */
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p->setup (width, height, mode_type);
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if (grub_errno == GRUB_ERR_NONE)
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{
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/* Valid mode found from adapter, and it has been activated.
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Specify it as active adapter. */
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grub_video_adapter_active = p;
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return GRUB_ERR_NONE;
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}
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else
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grub_errno = GRUB_ERR_NONE;
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/* No valid mode found in this adapter, finalize adapter. */
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p->fini ();
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if (grub_errno != GRUB_ERR_NONE)
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return grub_errno;
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}
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/* We couldn't find suitable adapter for specified mode. */
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return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
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"Can't locate valid adapter for mode");
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}
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/* Restore back to initial mode (where applicaple). */
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grub_err_t
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grub_video_restore (void)
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{
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if (grub_video_adapter_active)
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{
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grub_video_adapter_active->fini ();
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if (grub_errno != GRUB_ERR_NONE)
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return grub_errno;
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grub_video_adapter_active = 0;
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}
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return GRUB_ERR_NONE;
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}
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/* Get information about active video mode. */
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grub_err_t
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grub_video_get_info (struct grub_video_mode_info *mode_info)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->get_info (mode_info);
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}
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/* Determine optimized blitting formation for specified video mode info. */
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enum grub_video_blit_format
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grub_video_get_blit_format (struct grub_video_mode_info *mode_info)
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{
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/* Check if we have any knwon 32 bit modes. */
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if (mode_info->bpp == 32)
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{
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if ((mode_info->red_mask_size == 8)
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&& (mode_info->red_field_pos == 0)
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&& (mode_info->green_mask_size == 8)
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&& (mode_info->green_field_pos == 8)
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&& (mode_info->blue_mask_size == 8)
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&& (mode_info->blue_field_pos == 16)
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&& (mode_info->reserved_mask_size == 8)
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&& (mode_info->reserved_field_pos == 24))
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{
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return GRUB_VIDEO_BLIT_FORMAT_R8G8B8A8;
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}
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}
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/* Check if we have any known 24 bit modes. */
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if (mode_info->bpp == 24)
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{
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if ((mode_info->red_mask_size == 8)
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&& (mode_info->red_field_pos == 0)
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&& (mode_info->green_mask_size == 8)
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&& (mode_info->green_field_pos == 8)
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&& (mode_info->blue_mask_size == 8)
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&& (mode_info->blue_field_pos == 16))
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{
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return GRUB_VIDEO_BLIT_FORMAT_R8G8B8;
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}
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}
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/* If there are more than 8 bits per color, assume RGB(A) mode. */
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if (mode_info->bpp > 8)
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{
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if (mode_info->reserved_mask_size > 0)
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{
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return GRUB_VIDEO_BLIT_FORMAT_RGBA;
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}
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return GRUB_VIDEO_BLIT_FORMAT_RGB;
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}
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/* Assume as indexcolor mode. */
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return GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR;
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}
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/* Set new indexed color palette entries. */
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grub_err_t
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grub_video_set_palette (unsigned int start, unsigned int count,
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struct grub_video_palette_data *palette_data)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->set_palette (start, count, palette_data);
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}
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/* Get indexed color palette entries. */
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grub_err_t
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grub_video_get_palette (unsigned int start, unsigned int count,
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struct grub_video_palette_data *palette_data)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->get_palette (start, count, palette_data);
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}
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/* Set viewport dimensions. */
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grub_err_t
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grub_video_set_viewport (unsigned int x, unsigned int y,
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unsigned int width, unsigned int height)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->set_viewport (x, y, width, height);
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}
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/* Get viewport dimensions. */
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grub_err_t
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grub_video_get_viewport (unsigned int *x, unsigned int *y,
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unsigned int *width, unsigned int *height)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->get_viewport (x, y, width, height);
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}
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/* Map color name to adapter specific color. */
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grub_video_color_t
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grub_video_map_color (grub_uint32_t color_name)
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{
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if (! grub_video_adapter_active)
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return 0;
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return grub_video_adapter_active->map_color (color_name);
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}
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/* Map RGB value to adapter specific color. */
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grub_video_color_t
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grub_video_map_rgb (grub_uint8_t red, grub_uint8_t green, grub_uint8_t blue)
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{
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if (! grub_video_adapter_active)
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return 0;
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return grub_video_adapter_active->map_rgb (red, green, blue);
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}
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/* Map RGBA value to adapter specific color. */
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grub_video_color_t
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grub_video_map_rgba (grub_uint8_t red, grub_uint8_t green, grub_uint8_t blue,
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grub_uint8_t alpha)
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{
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if (! grub_video_adapter_active)
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return 0;
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return grub_video_adapter_active->map_rgba (red, green, blue, alpha);
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}
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/* Fill rectangle using specified color. */
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grub_err_t
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grub_video_fill_rect (grub_video_color_t color, int x, int y,
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unsigned int width, unsigned int height)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->fill_rect (color, x, y, width, height);
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}
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/* Blit glyph to screen using specified color. */
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grub_err_t
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grub_video_blit_glyph (struct grub_font_glyph *glyph,
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grub_video_color_t color, int x, int y)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->blit_glyph (glyph, color, x, y);
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}
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/* Blit bitmap to screen. */
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grub_err_t
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grub_video_blit_bitmap (struct grub_video_bitmap *bitmap,
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int x, int y, int offset_x, int offset_y,
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unsigned int width, unsigned int height)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->blit_bitmap (bitmap, x, y,
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offset_x, offset_y,
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width, height);
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}
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/* Blit render target to active render target. */
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grub_err_t
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grub_video_blit_render_target (struct grub_video_render_target *target,
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int x, int y, int offset_x, int offset_y,
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unsigned int width, unsigned int height)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->blit_render_target (target, x, y,
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offset_x, offset_y,
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width, height);
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}
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/* Scroll viewport and fill new areas with specified color. */
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grub_err_t
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grub_video_scroll (grub_video_color_t color, int dx, int dy)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->scroll (color, dx, dy);
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}
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/* Swap buffers (swap active render target). */
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grub_err_t
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grub_video_swap_buffers (void)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->swap_buffers ();
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}
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/* Create new render target. */
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grub_err_t
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grub_video_create_render_target (struct grub_video_render_target **result,
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unsigned int width, unsigned int height,
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unsigned int mode_type)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->create_render_target (result,
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width, height,
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mode_type);
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}
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/* Delete render target. */
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grub_err_t
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grub_video_delete_render_target (struct grub_video_render_target *target)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->delete_render_target (target);
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}
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/* Set active render target. */
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grub_err_t
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grub_video_set_active_render_target (struct grub_video_render_target *target)
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{
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if (! grub_video_adapter_active)
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return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
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return grub_video_adapter_active->set_active_render_target (target);
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}
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/* Initialize Video API module. */
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GRUB_MOD_INIT(video_video)
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{
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grub_video_adapter_active = 0;
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grub_video_adapter_list = 0;
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}
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/* Finalize Video API module. */
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GRUB_MOD_FINI(video_video)
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{
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}
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