/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2006,2007,2008 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/video.h>
#include <grub/types.h>
#include <grub/dl.h>
/* The list of video adapters registered to system. */
static grub_video_adapter_t grub_video_adapter_list;
/* Active video adapter. */
static grub_video_adapter_t grub_video_adapter_active;
/* Register video driver. */
void
grub_video_register (grub_video_adapter_t adapter)
{
adapter->next = grub_video_adapter_list;
grub_video_adapter_list = adapter;
}
/* Unregister video driver. */
void
grub_video_unregister (grub_video_adapter_t adapter)
{
grub_video_adapter_t *p, q;
for (p = &grub_video_adapter_list, q = *p; q; p = &(q->next), q = q->next)
if (q == adapter)
{
*p = q->next;
break;
}
}
/* Iterate thru all registered video drivers. */
void
grub_video_iterate (int (*hook) (grub_video_adapter_t adapter))
{
grub_video_adapter_t p;
for (p = grub_video_adapter_list; p; p = p->next)
if (hook (p))
break;
}
/* Setup specified video mode. */
grub_err_t
grub_video_setup (unsigned int width, unsigned int height,
unsigned int mode_type)
{
grub_video_adapter_t p;
/* De-activate last set video adapter. */
if (grub_video_adapter_active)
{
/* Finalize adapter. */
grub_video_adapter_active->fini ();
if (grub_errno != GRUB_ERR_NONE)
return grub_errno;
/* Mark active adapter as not set. */
grub_video_adapter_active = 0;
}
/* Loop thru all possible video adapter trying to find requested mode. */
for (p = grub_video_adapter_list; p; p = p->next)
{
/* Try to initialize adapter, if it fails, skip to next adapter. */
p->init ();
if (grub_errno != GRUB_ERR_NONE)
{
grub_errno = GRUB_ERR_NONE;
continue;
}
/* Try to initialize video mode. */
p->setup (width, height, mode_type);
if (grub_errno == GRUB_ERR_NONE)
{
/* Valid mode found from adapter, and it has been activated.
Specify it as active adapter. */
grub_video_adapter_active = p;
return GRUB_ERR_NONE;
}
else
grub_errno = GRUB_ERR_NONE;
/* No valid mode found in this adapter, finalize adapter. */
p->fini ();
if (grub_errno != GRUB_ERR_NONE)
return grub_errno;
}
/* We couldn't find suitable adapter for specified mode. */
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
"Can't locate valid adapter for mode");
}
/* Restore back to initial mode (where applicable). */
grub_err_t
grub_video_restore (void)
{
if (grub_video_adapter_active)
{
grub_video_adapter_active->fini ();
if (grub_errno != GRUB_ERR_NONE)
return grub_errno;
grub_video_adapter_active = 0;
}
return GRUB_ERR_NONE;
}
/* Get information about active video mode. */
grub_err_t
grub_video_get_info (struct grub_video_mode_info *mode_info)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
/* If mode_info is NULL just report that video adapter is active. */
if (! mode_info)
{
grub_errno = GRUB_ERR_NONE;
return grub_errno;
}
return grub_video_adapter_active->get_info (mode_info);
}
/* Determine optimized blitting formation for specified video mode info. */
enum grub_video_blit_format
grub_video_get_blit_format (struct grub_video_mode_info *mode_info)
{
/* Check if we have any known 32 bit modes. */
if (mode_info->bpp == 32)
{
if ((mode_info->red_mask_size == 8)
&& (mode_info->red_field_pos == 0)
&& (mode_info->green_mask_size == 8)
&& (mode_info->green_field_pos == 8)
&& (mode_info->blue_mask_size == 8)
&& (mode_info->blue_field_pos == 16)
&& (mode_info->reserved_mask_size == 8)
&& (mode_info->reserved_field_pos == 24))
{
return GRUB_VIDEO_BLIT_FORMAT_R8G8B8A8;
}
}
/* Check if we have any known 24 bit modes. */
if (mode_info->bpp == 24)
{
if ((mode_info->red_mask_size == 8)
&& (mode_info->red_field_pos == 0)
&& (mode_info->green_mask_size == 8)
&& (mode_info->green_field_pos == 8)
&& (mode_info->blue_mask_size == 8)
&& (mode_info->blue_field_pos == 16))
{
return GRUB_VIDEO_BLIT_FORMAT_R8G8B8;
}
}
/* If there are more than 8 bits per color, assume RGB(A) mode. */
if (mode_info->bpp > 8)
{
if (mode_info->reserved_mask_size > 0)
{
return GRUB_VIDEO_BLIT_FORMAT_RGBA;
}
return GRUB_VIDEO_BLIT_FORMAT_RGB;
}
/* Assume as indexcolor mode. */
return GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR;
}
/* Set new indexed color palette entries. */
grub_err_t
grub_video_set_palette (unsigned int start, unsigned int count,
struct grub_video_palette_data *palette_data)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->set_palette (start, count, palette_data);
}
/* Get indexed color palette entries. */
grub_err_t
grub_video_get_palette (unsigned int start, unsigned int count,
struct grub_video_palette_data *palette_data)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->get_palette (start, count, palette_data);
}
/* Set viewport dimensions. */
grub_err_t
grub_video_set_viewport (unsigned int x, unsigned int y,
unsigned int width, unsigned int height)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->set_viewport (x, y, width, height);
}
/* Get viewport dimensions. */
grub_err_t
grub_video_get_viewport (unsigned int *x, unsigned int *y,
unsigned int *width, unsigned int *height)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->get_viewport (x, y, width, height);
}
/* Map color name to adapter specific color. */
grub_video_color_t
grub_video_map_color (grub_uint32_t color_name)
{
if (! grub_video_adapter_active)
return 0;
return grub_video_adapter_active->map_color (color_name);
}
/* Map RGB value to adapter specific color. */
grub_video_color_t
grub_video_map_rgb (grub_uint8_t red, grub_uint8_t green, grub_uint8_t blue)
{
if (! grub_video_adapter_active)
return 0;
return grub_video_adapter_active->map_rgb (red, green, blue);
}
/* Map RGBA value to adapter specific color. */
grub_video_color_t
grub_video_map_rgba (grub_uint8_t red, grub_uint8_t green, grub_uint8_t blue,
grub_uint8_t alpha)
{
if (! grub_video_adapter_active)
return 0;
return grub_video_adapter_active->map_rgba (red, green, blue, alpha);
}
/* Unmap video color back to RGBA components. */
grub_err_t
grub_video_unmap_color (grub_video_color_t color, grub_uint8_t *red,
grub_uint8_t *green, grub_uint8_t *blue,
grub_uint8_t *alpha)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->unmap_color (color,
red,
green,
blue,
alpha);
}
/* Fill rectangle using specified color. */
grub_err_t
grub_video_fill_rect (grub_video_color_t color, int x, int y,
unsigned int width, unsigned int height)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->fill_rect (color, x, y, width, height);
}
/* Blit glyph to screen using specified color. */
grub_err_t
grub_video_blit_glyph (struct grub_font_glyph *glyph,
grub_video_color_t color, int x, int y)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->blit_glyph (glyph, color, x, y);
}
/* Blit bitmap to screen. */
grub_err_t
grub_video_blit_bitmap (struct grub_video_bitmap *bitmap,
enum grub_video_blit_operators oper,
int x, int y, int offset_x, int offset_y,
unsigned int width, unsigned int height)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->blit_bitmap (bitmap, oper, x, y,
offset_x, offset_y,
width, height);
}
/* Blit render target to active render target. */
grub_err_t
grub_video_blit_render_target (struct grub_video_render_target *target,
enum grub_video_blit_operators oper,
int x, int y, int offset_x, int offset_y,
unsigned int width, unsigned int height)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->blit_render_target (target, oper, x, y,
offset_x, offset_y,
width, height);
}
/* Scroll viewport and fill new areas with specified color. */
grub_err_t
grub_video_scroll (grub_video_color_t color, int dx, int dy)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->scroll (color, dx, dy);
}
/* Swap buffers (swap active render target). */
grub_err_t
grub_video_swap_buffers (void)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->swap_buffers ();
}
/* Create new render target. */
grub_err_t
grub_video_create_render_target (struct grub_video_render_target **result,
unsigned int width, unsigned int height,
unsigned int mode_type)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->create_render_target (result,
width, height,
mode_type);
}
/* Delete render target. */
grub_err_t
grub_video_delete_render_target (struct grub_video_render_target *target)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->delete_render_target (target);
}
/* Set active render target. */
grub_err_t
grub_video_set_active_render_target (struct grub_video_render_target *target)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->set_active_render_target (target);
}
/* Get active render target. */
grub_err_t
grub_video_get_active_render_target (struct grub_video_render_target **target)
{
if (! grub_video_adapter_active)
return grub_error (GRUB_ERR_BAD_DEVICE, "No video mode activated");
return grub_video_adapter_active->get_active_render_target (target);
}
/* Initialize Video API module. */
GRUB_MOD_INIT(video_video)
{
grub_video_adapter_active = 0;
grub_video_adapter_list = 0;
}
/* Finalize Video API module. */
GRUB_MOD_FINI(video_video)
{
}