diff options
Diffstat (limited to 'qemu/roms/ipxe/src/image/pnm.c')
| -rw-r--r-- | qemu/roms/ipxe/src/image/pnm.c | 419 |
1 files changed, 0 insertions, 419 deletions
diff --git a/qemu/roms/ipxe/src/image/pnm.c b/qemu/roms/ipxe/src/image/pnm.c deleted file mode 100644 index f24b28841..000000000 --- a/qemu/roms/ipxe/src/image/pnm.c +++ /dev/null @@ -1,419 +0,0 @@ -/* - * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program 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 2 of the - * License, or any later version. - * - * This program 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 this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** @file - * - * Portable anymap format (PNM) - * - */ - -#include <stdlib.h> -#include <errno.h> -#include <ctype.h> -#include <ipxe/image.h> -#include <ipxe/pixbuf.h> -#include <ipxe/pnm.h> - -/** - * Extract PNM ASCII value - * - * @v image PNM image - * @v pnm PNM context - * @ret value Value, or negative error - */ -static int pnm_ascii ( struct image *image, struct pnm_context *pnm ) { - char buf[ pnm->ascii_len + 1 /* NUL */ ]; - char *endp; - size_t len; - int value; - int in_comment = 0; - - /* Skip any leading whitespace and comments */ - for ( ; pnm->offset < image->len ; pnm->offset++ ) { - copy_from_user ( &buf[0], image->data, pnm->offset, - sizeof ( buf[0] ) ); - if ( in_comment ) { - if ( buf[0] == '\n' ) - in_comment = 0; - } else { - if ( buf[0] == '#' ) { - in_comment = 1; - } else if ( ! isspace ( buf[0] ) ) { - break; - } - } - } - - /* Fail if no value is present */ - len = ( image->len - pnm->offset ); - if ( len == 0 ) { - DBGC ( image, "PNM %s ran out of ASCII data\n", image->name ); - return -EINVAL; - } - - /* Copy ASCII value to buffer and ensure string is NUL-terminated */ - if ( len > ( sizeof ( buf ) - 1 /* NUL */ ) ) - len = ( sizeof ( buf ) - 1 /* NUL */ ); - copy_from_user ( buf, image->data, pnm->offset, len ); - buf[len] = '\0'; - - /* Parse value and update offset */ - value = strtoul ( buf, &endp, 0 ); - pnm->offset += ( endp - buf ); - - /* Check and skip terminating whitespace character, if present */ - if ( ( pnm->offset != image->len ) && ( *endp != '\0' ) ) { - if ( ! isspace ( *endp ) ) { - DBGC ( image, "PNM %s invalid ASCII integer\n", - image->name ); - return -EINVAL; - } - pnm->offset++; - } - - return value; -} - -/** - * Extract PNM binary value - * - * @v image PNM image - * @v pnm PNM context - * @ret value Value, or negative error - */ -static int pnm_binary ( struct image *image, struct pnm_context *pnm ) { - uint8_t value; - - /* Sanity check */ - if ( pnm->offset == image->len ) { - DBGC ( image, "PNM %s ran out of binary data\n", - image->name ); - return -EINVAL; - } - - /* Extract value */ - copy_from_user ( &value, image->data, pnm->offset, sizeof ( value ) ); - pnm->offset++; - - return value; -} - -/** - * Scale PNM scalar value - * - * @v image PNM image - * @v pnm PNM context - * @v value Raw value - * @ret value Scaled value (in range 0-255) - */ -static int pnm_scale ( struct image *image, struct pnm_context *pnm, - unsigned int value ) { - - if ( value > pnm->max ) { - DBGC ( image, "PNM %s has out-of-range value %d (max %d)\n", - image->name, value, pnm->max ); - return -EINVAL; - } - return ( ( 255 * value ) / pnm->max ); -} - -/** - * Convert PNM bitmap composite value to RGB - * - * @v composite Composite value - * @v index Pixel index within this composite value - * @ret rgb 24-bit RGB value - */ -static uint32_t pnm_bitmap ( uint32_t composite, unsigned int index ) { - - /* Composite value is an 8-bit bitmask */ - return ( ( ( composite << index ) & 0x80 ) ? 0x000000 : 0xffffff ); -} - -/** - * Convert PNM greymap composite value to RGB - * - * @v composite Composite value - * @v index Pixel index within this composite value - * @ret rgb 24-bit RGB value - */ -static uint32_t pnm_greymap ( uint32_t composite, unsigned int index __unused ){ - - /* Composite value is an 8-bit greyscale value */ - return ( ( composite << 16 ) | ( composite << 8 ) | composite ); -} - -/** - * Convert PNM pixmap composite value to RGB - * - * @v composite Composite value - * @v index Pixel index within this composite value - * @ret rgb 24-bit RGB value - */ -static uint32_t pnm_pixmap ( uint32_t composite, unsigned int index __unused ) { - - /* Composite value is already an RGB value */ - return composite; -} - -/** - * Extract PNM pixel data - * - * @v image PNM image - * @v pnm PNM context - * @v pixbuf Pixel buffer - * @ret rc Return status code - */ -static int pnm_data ( struct image *image, struct pnm_context *pnm, - struct pixel_buffer *pixbuf ) { - struct pnm_type *type = pnm->type; - size_t offset = 0; - unsigned int xpos = 0; - int scalar; - uint32_t composite; - uint32_t rgb; - unsigned int i; - - /* Fill pixel buffer */ - while ( offset < pixbuf->len ) { - - /* Extract a scaled composite scalar value from the file */ - composite = 0; - for ( i = 0 ; i < type->depth ; i++ ) { - scalar = type->scalar ( image, pnm ); - if ( scalar < 0 ) - return scalar; - scalar = pnm_scale ( image, pnm, scalar ); - if ( scalar < 0 ) - return scalar; - composite = ( ( composite << 8 ) | scalar ); - } - - /* Extract 24-bit RGB values from composite value */ - for ( i = 0 ; i < type->packing ; i++ ) { - if ( offset >= pixbuf->len ) { - DBGC ( image, "PNM %s has too many pixels\n", - image->name ); - return -EINVAL; - } - rgb = type->rgb ( composite, i ); - copy_to_user ( pixbuf->data, offset, &rgb, - sizeof ( rgb ) ); - offset += sizeof ( rgb ); - if ( ++xpos == pixbuf->width ) { - xpos = 0; - break; - } - } - } - - return 0; -} - -/** PNM image types */ -static struct pnm_type pnm_types[] = { - { - .type = '1', - .depth = 1, - .packing = 1, - .flags = PNM_BITMAP, - .scalar = pnm_ascii, - .rgb = pnm_bitmap, - }, - { - .type = '2', - .depth = 1, - .packing = 1, - .scalar = pnm_ascii, - .rgb = pnm_greymap, - }, - { - .type = '3', - .depth = 3, - .packing = 1, - .scalar = pnm_ascii, - .rgb = pnm_pixmap, - }, - { - .type = '4', - .depth = 1, - .packing = 8, - .flags = PNM_BITMAP, - .scalar = pnm_binary, - .rgb = pnm_bitmap, - }, - { - .type = '5', - .depth = 1, - .packing = 1, - .scalar = pnm_binary, - .rgb = pnm_greymap, - }, - { - .type = '6', - .depth = 3, - .packing = 1, - .scalar = pnm_binary, - .rgb = pnm_pixmap, - }, -}; - -/** - * Determine PNM image type - * - * @v image PNM image - * @ret type PNM image type, or NULL if not found - */ -static struct pnm_type * pnm_type ( struct image *image ) { - struct pnm_signature signature; - struct pnm_type *type; - unsigned int i; - - /* Extract signature */ - assert ( image->len >= sizeof ( signature ) ); - copy_from_user ( &signature, image->data, 0, sizeof ( signature ) ); - - /* Check for supported types */ - for ( i = 0 ; i < ( sizeof ( pnm_types ) / - sizeof ( pnm_types[0] ) ) ; i++ ) { - type = &pnm_types[i]; - if ( type->type == signature.type ) - return type; - } - return NULL; -} - -/** - * Convert PNM image to pixel buffer - * - * @v image PNM image - * @v pixbuf Pixel buffer to fill in - * @ret rc Return status code - */ -static int pnm_pixbuf ( struct image *image, struct pixel_buffer **pixbuf ) { - struct pnm_context pnm; - int width; - int height; - int max; - int rc; - - /* Initialise PNM context */ - pnm.type = pnm_type ( image ); - if ( ! pnm.type ) { - rc = -ENOTSUP; - goto err_type; - } - pnm.offset = sizeof ( struct pnm_signature ); - pnm.ascii_len = PNM_ASCII_LEN; - - /* Extract width */ - if ( ( width = pnm_ascii ( image, &pnm ) ) < 0 ) { - rc = width; - goto err_width; - } - - /* Extract height */ - if ( ( height = pnm_ascii ( image, &pnm ) ) < 0 ) { - rc = height; - goto err_height; - } - - /* Extract maximum scalar value, if not predefined */ - if ( pnm.type->flags & PNM_BITMAP ) { - pnm.max = ( ( 1 << pnm.type->packing ) - 1 ); - pnm.ascii_len = 1; - } else { - if ( ( max = pnm_ascii ( image, &pnm ) ) < 0 ) { - rc = max; - goto err_max; - } - pnm.max = max; - } - if ( pnm.max == 0 ) { - DBGC ( image, "PNM %s has invalid maximum value 0\n", - image->name ); - rc = -EINVAL; - goto err_max; - } - DBGC ( image, "PNM %s is type %c width %d height %d max %d\n", - image->name, pnm.type->type, width, height, pnm.max ); - - /* Allocate pixel buffer */ - *pixbuf = alloc_pixbuf ( width, height ); - if ( ! *pixbuf ) { - rc = -ENOMEM; - goto err_alloc_pixbuf; - } - - /* Extract pixel data */ - if ( ( rc = pnm_data ( image, &pnm, *pixbuf ) ) != 0 ) - goto err_data; - - return 0; - - err_data: - pixbuf_put ( *pixbuf ); - err_alloc_pixbuf: - err_max: - err_height: - err_width: - err_type: - return rc; -} - -/** - * Probe PNM image - * - * @v image PNM image - * @ret rc Return status code - */ -static int pnm_probe ( struct image *image ) { - struct pnm_signature signature; - - /* Sanity check */ - if ( image->len < sizeof ( signature ) ) { - DBGC ( image, "PNM %s is too short\n", image->name ); - return -ENOEXEC; - } - - /* Check signature */ - copy_from_user ( &signature, image->data, 0, sizeof ( signature ) ); - if ( ! ( ( signature.magic == PNM_MAGIC ) && - ( isdigit ( signature.type ) ) && - ( isspace ( signature.space ) ) ) ) { - DBGC ( image, "PNM %s has invalid signature\n", image->name ); - return -ENOEXEC; - } - DBGC ( image, "PNM %s is type %c\n", image->name, signature.type ); - - return 0; -} - -/** PNM image type */ -struct image_type pnm_image_type __image_type ( PROBE_NORMAL ) = { - .name = "PNM", - .probe = pnm_probe, - .pixbuf = pnm_pixbuf, -}; |