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-rw-r--r--grub-core/video/emu/sdl.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/grub-core/video/emu/sdl.c b/grub-core/video/emu/sdl.c
new file mode 100644
index 0000000..0ebab6f
--- /dev/null
+++ b/grub-core/video/emu/sdl.c
@@ -0,0 +1,252 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2005,2006,2007,2008,2009 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/>.
+ */
+
+#define grub_video_render_target grub_video_fbrender_target
+
+#include <grub/err.h>
+#include <grub/types.h>
+#include <grub/dl.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/video.h>
+#include <grub/video_fb.h>
+#include <SDL/SDL.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static SDL_Surface *window = 0;
+static struct grub_video_render_target *sdl_render_target;
+static struct grub_video_mode_info mode_info;
+
+static grub_err_t
+grub_video_sdl_set_palette (unsigned int start, unsigned int count,
+ struct grub_video_palette_data *palette_data);
+
+static grub_err_t
+grub_video_sdl_init (void)
+{
+ window = 0;
+
+ if (SDL_Init (SDL_INIT_VIDEO) < 0)
+ return grub_error (GRUB_ERR_BAD_DEVICE, "Couldn't init SDL: %s",
+ SDL_GetError ());
+
+ grub_memset (&mode_info, 0, sizeof (mode_info));
+
+ return grub_video_fb_init ();
+}
+
+static grub_err_t
+grub_video_sdl_fini (void)
+{
+ SDL_Quit ();
+ window = 0;
+
+ grub_memset (&mode_info, 0, sizeof (mode_info));
+
+ return grub_video_fb_fini ();
+}
+
+static inline unsigned int
+get_mask_size (grub_uint32_t mask)
+{
+ unsigned i;
+ for (i = 0; mask > 1U << i; i++);
+ return i;
+}
+
+static grub_err_t
+grub_video_sdl_setup (unsigned int width, unsigned int height,
+ unsigned int mode_type, unsigned int mode_mask)
+{
+ int depth;
+ int flags = 0;
+ grub_err_t err;
+
+ /* Decode depth from mode_type. If it is zero, then autodetect. */
+ depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
+ >> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;
+
+ if (depth == 0)
+ depth = 32;
+
+ if (width == 0 && height == 0)
+ {
+ width = 800;
+ height = 600;
+ }
+
+ if ((mode_type & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED)
+ || !(mode_mask & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED))
+ flags |= SDL_DOUBLEBUF;
+
+ window = SDL_SetVideoMode (width, height, depth, flags | SDL_HWSURFACE);
+ if (! window)
+ window = SDL_SetVideoMode (width, height, depth, flags | SDL_SWSURFACE);
+ if (! window)
+ return grub_error (GRUB_ERR_BAD_DEVICE, "Couldn't open window: %s",
+ SDL_GetError ());
+
+ grub_memset (&sdl_render_target, 0, sizeof (sdl_render_target));
+
+ mode_info.width = window->w;
+ mode_info.height = window->h;
+ mode_info.mode_type = 0;
+ if (window->flags & SDL_DOUBLEBUF)
+ mode_info.mode_type
+ |= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
+ if (window->format->palette)
+ mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
+ else
+ mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_RGB;
+
+ mode_info.bpp = window->format->BitsPerPixel;
+ mode_info.bytes_per_pixel = window->format->BytesPerPixel;
+ mode_info.pitch = window->pitch;
+
+ /* In index color mode, number of colors. In RGB mode this is 256. */
+ if (window->format->palette)
+ mode_info.number_of_colors
+ = 1 << window->format->BitsPerPixel;
+ else
+ mode_info.number_of_colors = 256;
+
+ if (! window->format->palette)
+ {
+ mode_info.red_mask_size
+ = get_mask_size (window->format->Rmask >> window->format->Rshift);
+ mode_info.red_field_pos = window->format->Rshift;
+ mode_info.green_mask_size
+ = get_mask_size (window->format->Gmask >> window->format->Gshift);
+ mode_info.green_field_pos = window->format->Gshift;
+ mode_info.blue_mask_size
+ = get_mask_size (window->format->Bmask >> window->format->Bshift);
+ mode_info.blue_field_pos = window->format->Bshift;
+ mode_info.reserved_mask_size
+ = get_mask_size (window->format->Amask >> window->format->Ashift);
+ mode_info.reserved_field_pos = window->format->Ashift;
+ mode_info.blit_format
+ = grub_video_get_blit_format (&mode_info);
+ }
+
+ err = grub_video_fb_create_render_target_from_pointer (&sdl_render_target,
+ &mode_info,
+ window->pixels);
+ if (err)
+ return err;
+
+ /* Copy default palette to initialize emulated palette. */
+ grub_video_sdl_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
+ grub_video_fbstd_colors);
+
+ /* Reset render target to SDL one. */
+ return grub_video_fb_set_active_render_target (sdl_render_target);
+}
+
+static grub_err_t
+grub_video_sdl_set_palette (unsigned int start, unsigned int count,
+ struct grub_video_palette_data *palette_data)
+{
+ unsigned i;
+ if (window->format->palette)
+ {
+ SDL_Color *tmp;
+ if (start >= mode_info.number_of_colors)
+ return GRUB_ERR_NONE;
+
+ if (start + count > mode_info.number_of_colors)
+ count = mode_info.number_of_colors - start;
+
+ tmp = grub_calloc (count, sizeof (tmp[0]));
+ for (i = 0; i < count; i++)
+ {
+ tmp[i].r = palette_data[i].r;
+ tmp[i].g = palette_data[i].g;
+ tmp[i].b = palette_data[i].b;
+ tmp[i].unused = palette_data[i].a;
+ }
+ SDL_SetColors (window, tmp, start, count);
+ grub_free (tmp);
+ }
+
+ return grub_video_fb_set_palette (start, count, palette_data);
+}
+
+static grub_err_t
+grub_video_sdl_swap_buffers (void)
+{
+ if (SDL_Flip (window) < 0)
+ return grub_error (GRUB_ERR_BAD_DEVICE, "couldn't swap buffers: %s",
+ SDL_GetError ());
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_video_sdl_set_active_render_target (struct grub_video_render_target *target)
+{
+ if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
+ return grub_video_fb_set_active_render_target (sdl_render_target);
+
+ return grub_video_fb_set_active_render_target (target);
+}
+
+static struct grub_video_adapter grub_video_sdl_adapter =
+ {
+ .name = "SDL Video Driver",
+ .id = GRUB_VIDEO_DRIVER_SDL,
+
+ .prio = GRUB_VIDEO_ADAPTER_PRIO_FIRMWARE,
+
+ .init = grub_video_sdl_init,
+ .fini = grub_video_sdl_fini,
+ .setup = grub_video_sdl_setup,
+ .get_info = grub_video_fb_get_info,
+ .set_palette = grub_video_sdl_set_palette,
+ .get_palette = grub_video_fb_get_palette,
+ .set_viewport = grub_video_fb_set_viewport,
+ .get_viewport = grub_video_fb_get_viewport,
+ .set_region = grub_video_fb_set_region,
+ .get_region = grub_video_fb_get_region,
+ .set_area_status = grub_video_fb_set_area_status,
+ .get_area_status = grub_video_fb_get_area_status,
+ .map_color = grub_video_fb_map_color,
+ .map_rgb = grub_video_fb_map_rgb,
+ .map_rgba = grub_video_fb_map_rgba,
+ .unmap_color = grub_video_fb_unmap_color,
+ .fill_rect = grub_video_fb_fill_rect,
+ .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_sdl_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_sdl_set_active_render_target,
+ .get_active_render_target = grub_video_fb_get_active_render_target,
+
+ .next = 0
+ };
+
+GRUB_MOD_INIT(sdl)
+{
+ grub_video_register (&grub_video_sdl_adapter);
+}
+
+GRUB_MOD_FINI(sdl)
+{
+ grub_video_unregister (&grub_video_sdl_adapter);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-04 23:35:15 +0000