248 lines
7.2 KiB
C
248 lines
7.2 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB 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 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define grub_video_render_target grub_video_fbrender_target
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#include <grub/err.h>
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#include <grub/types.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/video.h>
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#include <grub/video_fb.h>
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#include <SDL/SDL.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static SDL_Surface *window = 0;
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static struct grub_video_render_target *sdl_render_target;
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static struct grub_video_mode_info mode_info;
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static grub_err_t
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grub_video_sdl_set_palette (unsigned int start, unsigned int count,
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struct grub_video_palette_data *palette_data);
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static grub_err_t
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grub_video_sdl_init (void)
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{
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window = 0;
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if (SDL_Init (SDL_INIT_VIDEO) < 0)
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return grub_error (GRUB_ERR_BAD_DEVICE, "Couldn't init SDL: %s",
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SDL_GetError ());
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grub_memset (&mode_info, 0, sizeof (mode_info));
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return grub_video_fb_init ();
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}
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static grub_err_t
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grub_video_sdl_fini (void)
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{
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SDL_Quit ();
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window = 0;
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grub_memset (&mode_info, 0, sizeof (mode_info));
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return grub_video_fb_fini ();
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}
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static inline unsigned int
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get_mask_size (grub_uint32_t mask)
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{
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unsigned i;
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for (i = 0; mask > 1U << i; i++);
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return i;
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}
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static grub_err_t
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grub_video_sdl_setup (unsigned int width, unsigned int height,
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unsigned int mode_type, unsigned int mode_mask)
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{
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int depth;
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int flags = 0;
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grub_err_t err;
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/* Decode depth from mode_type. If it is zero, then autodetect. */
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depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
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>> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
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if (depth == 0)
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depth = 32;
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if (width == 0 && height == 0)
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{
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width = 800;
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height = 600;
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}
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if ((mode_type & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED)
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|| !(mode_mask & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED))
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flags |= SDL_DOUBLEBUF;
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window = SDL_SetVideoMode (width, height, depth, flags | SDL_HWSURFACE);
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if (! window)
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window = SDL_SetVideoMode (width, height, depth, flags | SDL_SWSURFACE);
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if (! window)
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return grub_error (GRUB_ERR_BAD_DEVICE, "Couldn't open window: %s",
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SDL_GetError ());
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grub_memset (&sdl_render_target, 0, sizeof (sdl_render_target));
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mode_info.width = window->w;
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mode_info.height = window->h;
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mode_info.mode_type = 0;
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if (window->flags & SDL_DOUBLEBUF)
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mode_info.mode_type
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|= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
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if (window->format->palette)
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mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
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else
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mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_RGB;
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mode_info.bpp = window->format->BitsPerPixel;
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mode_info.bytes_per_pixel = window->format->BytesPerPixel;
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mode_info.pitch = window->pitch;
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/* In index color mode, number of colors. In RGB mode this is 256. */
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if (window->format->palette)
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mode_info.number_of_colors
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= 1 << window->format->BitsPerPixel;
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else
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mode_info.number_of_colors = 256;
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if (! window->format->palette)
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{
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mode_info.red_mask_size
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= get_mask_size (window->format->Rmask >> window->format->Rshift);
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mode_info.red_field_pos = window->format->Rshift;
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mode_info.green_mask_size
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= get_mask_size (window->format->Gmask >> window->format->Gshift);
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mode_info.green_field_pos = window->format->Gshift;
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mode_info.blue_mask_size
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= get_mask_size (window->format->Bmask >> window->format->Bshift);
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mode_info.blue_field_pos = window->format->Bshift;
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mode_info.reserved_mask_size
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= get_mask_size (window->format->Amask >> window->format->Ashift);
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mode_info.reserved_field_pos = window->format->Ashift;
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mode_info.blit_format
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= grub_video_get_blit_format (&mode_info);
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}
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err = grub_video_fb_create_render_target_from_pointer (&sdl_render_target,
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&mode_info,
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window->pixels);
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if (err)
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return err;
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/* Copy default palette to initialize emulated palette. */
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grub_video_sdl_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
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grub_video_fbstd_colors);
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/* Reset render target to SDL one. */
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return grub_video_fb_set_active_render_target (sdl_render_target);
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}
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static grub_err_t
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grub_video_sdl_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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unsigned i;
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if (window->format->palette)
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{
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SDL_Color *tmp;
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if (start >= mode_info.number_of_colors)
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return GRUB_ERR_NONE;
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if (start + count > mode_info.number_of_colors)
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count = mode_info.number_of_colors - start;
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tmp = grub_malloc (count * sizeof (tmp[0]));
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for (i = 0; i < count; i++)
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{
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tmp[i].r = palette_data[i].r;
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tmp[i].g = palette_data[i].g;
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tmp[i].b = palette_data[i].b;
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tmp[i].unused = palette_data[i].a;
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}
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SDL_SetColors (window, tmp, start, count);
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grub_free (tmp);
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}
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return grub_video_fb_set_palette (start, count, palette_data);
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}
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static grub_err_t
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grub_video_sdl_swap_buffers (void)
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{
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if (SDL_Flip (window) < 0)
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return grub_error (GRUB_ERR_BAD_DEVICE, "couldn't swap buffers: %s",
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SDL_GetError ());
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_video_sdl_set_active_render_target (struct grub_video_render_target *target)
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{
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if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
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return grub_video_fb_set_active_render_target (sdl_render_target);
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return grub_video_fb_set_active_render_target (target);
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}
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static struct grub_video_adapter grub_video_sdl_adapter =
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{
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.name = "SDL Video Driver",
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.id = GRUB_VIDEO_DRIVER_SDL,
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.prio = GRUB_VIDEO_ADAPTER_PRIO_FIRMWARE,
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.init = grub_video_sdl_init,
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.fini = grub_video_sdl_fini,
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.setup = grub_video_sdl_setup,
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.get_info = grub_video_fb_get_info,
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.set_palette = grub_video_sdl_set_palette,
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.get_palette = grub_video_fb_get_palette,
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.set_viewport = grub_video_fb_set_viewport,
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.get_viewport = grub_video_fb_get_viewport,
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.map_color = grub_video_fb_map_color,
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.map_rgb = grub_video_fb_map_rgb,
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.map_rgba = grub_video_fb_map_rgba,
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.unmap_color = grub_video_fb_unmap_color,
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.fill_rect = grub_video_fb_fill_rect,
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.blit_bitmap = grub_video_fb_blit_bitmap,
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.blit_render_target = grub_video_fb_blit_render_target,
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.scroll = grub_video_fb_scroll,
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.swap_buffers = grub_video_sdl_swap_buffers,
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.create_render_target = grub_video_fb_create_render_target,
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.delete_render_target = grub_video_fb_delete_render_target,
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.set_active_render_target = grub_video_sdl_set_active_render_target,
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.get_active_render_target = grub_video_fb_get_active_render_target,
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.next = 0
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};
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GRUB_MOD_INIT(sdl)
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{
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grub_video_register (&grub_video_sdl_adapter);
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}
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GRUB_MOD_FINI(sdl)
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{
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grub_video_unregister (&grub_video_sdl_adapter);
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}
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