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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007 Free Software Foundation, Inc.
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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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* 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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* 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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#include <grub/video.h>
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#include <grub/bitmap.h>
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#include <grub/types.h>
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#include <grub/misc.h>
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/* List of bitmap readers registered to system. */
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static grub_video_bitmap_reader_t bitmap_readers_list;
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/* Register bitmap reader. */
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grub_video_bitmap_reader_register (grub_video_bitmap_reader_t reader)
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reader->next = bitmap_readers_list;
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bitmap_readers_list = reader;
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/* Unregister bitmap reader. */
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grub_video_bitmap_reader_unregister (grub_video_bitmap_reader_t reader)
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grub_video_bitmap_reader_t *p, q;
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for (p = &bitmap_readers_list, q = *p; q; p = &(q->next), q = q->next)
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/* Creates new bitmap, saves created bitmap on success to *bitmap. */
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grub_video_bitmap_create (struct grub_video_bitmap **bitmap,
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unsigned int width, unsigned int height,
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enum grub_video_blit_format blit_format)
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struct grub_video_mode_info *mode_info;
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid argument");
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if (width == 0 || height == 0)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid argument");
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*bitmap = (struct grub_video_bitmap *)grub_malloc (sizeof (struct grub_video_bitmap));
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mode_info = &((*bitmap)->mode_info);
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/* Populate mode_info. */
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mode_info->width = width;
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mode_info->height = height;
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mode_info->blit_format = blit_format;
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case GRUB_VIDEO_BLIT_FORMAT_RGBA_8888:
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mode_info->mode_type = GRUB_VIDEO_MODE_TYPE_RGB
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| GRUB_VIDEO_MODE_TYPE_ALPHA;
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mode_info->bytes_per_pixel = 4;
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mode_info->number_of_colors = 256;
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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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case GRUB_VIDEO_BLIT_FORMAT_RGB_888:
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mode_info->mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
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mode_info->bytes_per_pixel = 3;
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mode_info->number_of_colors = 256;
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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 = 0;
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mode_info->reserved_field_pos = 0;
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case GRUB_VIDEO_BLIT_FORMAT_INDEXCOLOR:
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mode_info->mode_type = GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
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mode_info->bytes_per_pixel = 1;
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mode_info->number_of_colors = 256;
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mode_info->red_mask_size = 0;
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mode_info->red_field_pos = 0;
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mode_info->green_mask_size = 0;
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mode_info->green_field_pos = 0;
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mode_info->blue_mask_size = 0;
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mode_info->blue_field_pos = 0;
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mode_info->reserved_mask_size = 0;
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mode_info->reserved_field_pos = 0;
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"unsupported bitmap format");
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mode_info->pitch = width * mode_info->bytes_per_pixel;
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/* Calculate size needed for the data. */
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size = (width * mode_info->bytes_per_pixel) * height;
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(*bitmap)->data = grub_zalloc (size);
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if (! (*bitmap)->data)
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return GRUB_ERR_NONE;
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/* Frees all resources allocated by bitmap. */
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grub_video_bitmap_destroy (struct grub_video_bitmap *bitmap)
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return GRUB_ERR_NONE;
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grub_free (bitmap->data);
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return GRUB_ERR_NONE;
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/* Match extension to filename. */
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match_extension (const char *filename, const char *ext)
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pos = grub_strlen (filename);
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ext_len = grub_strlen (ext);
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if (! pos || ! ext_len || ext_len > pos)
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return grub_strcmp (filename + pos, ext) == 0;
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/* Loads bitmap using registered bitmap readers. */
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grub_video_bitmap_load (struct grub_video_bitmap **bitmap,
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const char *filename)
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grub_video_bitmap_reader_t reader = bitmap_readers_list;
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid argument");
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if (match_extension (filename, reader->extension))
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return reader->reader (bitmap, filename);
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reader = reader->next;
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return grub_error(GRUB_ERR_BAD_FILE_TYPE, "unsupported bitmap format");
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/* Return bitmap width. */
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grub_video_bitmap_get_width (struct grub_video_bitmap *bitmap)
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return bitmap->mode_info.width;
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/* Return bitmap height. */
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grub_video_bitmap_get_height (struct grub_video_bitmap *bitmap)
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return bitmap->mode_info.height;
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/* Return mode info for bitmap. */
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void grub_video_bitmap_get_mode_info (struct grub_video_bitmap *bitmap,
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struct grub_video_mode_info *mode_info)
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*mode_info = bitmap->mode_info;
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/* Return pointer to bitmap's raw data. */
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void *grub_video_bitmap_get_data (struct grub_video_bitmap *bitmap)
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/* Initialize bitmap module. */
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GRUB_MOD_INIT(bitmap)
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/* Finalize bitmap module. */
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GRUB_MOD_FINI(bitmap)