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grub/video/readers/tga.c
bean 9175e93d11 2008-08-01 Bean <bean123ch@gmail.com> 
* conf/common.rmk (pkglib_MODULES): Add bufio.mod.
	(bufio_mod_SOURCES): New macro.
	(bufio_mod_CFLAGS): Likewise.
	(bufio_mod_LDFLAGS): Likewise.

	* include/grub/bufio.h: New file.

	* io/bufio.c: Likewise.

	* video/png.c: Replace <grub/file.h> with <grub/bufio.h>.
	(grub_video_reader_png): Use grub_buffile_open to open file.

	* video/jpeg.c: Replace <grub/file.h> with <grub/bufio.h>.
	(grub_video_reader_jpeg): Use grub_buffile_open to open file.

	* video/tga.c: Replace <grub/file.h> with <grub/bufio.h>.
	(grub_video_reader_tga): Use grub_buffile_open to open file.

	* font/manager.c: Include <grub/bufio.h>.
	(add_font): Use grub_buffile_open to open file.
2008-08-01 04:06:55 +00:00

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2006,2007 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/bitmap.h>
#include <grub/types.h>
#include <grub/normal.h>
#include <grub/dl.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/arg.h>
#include <grub/bufio.h>
/* Uncomment following define to enable TGA debug. */
//#define TGA_DEBUG
#if defined(TGA_DEBUG)
#define dump_int_field(x) grub_printf( #x " = %d (0x%04x)\n", x, x);
#endif
enum
{
GRUB_TGA_IMAGE_TYPE_NONE = 0,
GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_INDEXCOLOR = 1,
GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_TRUECOLOR = 2,
GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_BLACK_AND_WHITE = 3,
GRUB_TGA_IMAGE_TYPE_RLE_INDEXCOLOR = 9,
GRUB_TGA_IMAGE_TYPE_RLE_TRUECOLOR = 10,
GRUB_TGA_IMAGE_TYPE_RLE_BLACK_AND_WHITE = 11,
};
enum
{
GRUB_TGA_COLOR_MAP_TYPE_NONE = 0,
GRUB_TGA_COLOR_MAP_TYPE_INCLUDED = 1
};
enum
{
GRUB_TGA_IMAGE_ORIGIN_RIGHT = 0x10,
GRUB_TGA_IMAGE_ORIGIN_TOP = 0x20
};
struct grub_tga_header
{
grub_uint8_t id_length;
grub_uint8_t color_map_type;
grub_uint8_t image_type;
/* Color Map Specification. */
grub_uint16_t color_map_first_index;
grub_uint16_t color_map_length;
grub_uint8_t color_map_bpp;
/* Image Specification. */
grub_uint16_t image_x_origin;
grub_uint16_t image_y_origin;
grub_uint16_t image_width;
grub_uint16_t image_height;
grub_uint8_t image_bpp;
grub_uint8_t image_descriptor;
} __attribute__ ((packed));
static grub_err_t
tga_load_truecolor_rle_R8G8B8 (struct grub_video_bitmap *bitmap,
struct grub_tga_header *header,
grub_file_t file)
{
unsigned int x;
unsigned int y;
grub_uint8_t type;
grub_uint8_t *ptr;
grub_uint8_t tmp[4]; /* Size should be max_bpp / 8. */
grub_uint8_t bytes_per_pixel;
bytes_per_pixel = header->image_bpp / 8;
for (y = 0; y < header->image_height; y++)
{
ptr = bitmap->data;
if ((header->image_descriptor & GRUB_TGA_IMAGE_ORIGIN_TOP) != 0)
ptr += y * bitmap->mode_info.pitch;
else
ptr += (header->image_height - 1 - y) * bitmap->mode_info.pitch;
for (x = 0; x < header->image_width;)
{
if (grub_file_read (file, (char *)&type, sizeof (type)) != sizeof(type))
return grub_errno;
if (type & 0x80)
{
/* RLE-encoded packet. */
type &= 0x7f;
type++;
if (grub_file_read (file, (char *)&tmp[0], bytes_per_pixel)
!= bytes_per_pixel)
return grub_errno;
while (type)
{
if (x < header->image_width)
{
ptr[0] = tmp[2];
ptr[1] = tmp[1];
ptr[2] = tmp[0];
ptr += 3;
}
type--;
x++;
}
}
else
{
/* RAW-encoded packet. */
type++;
while (type)
{
if (grub_file_read (file, (char *)&tmp[0], bytes_per_pixel)
!= bytes_per_pixel)
return grub_errno;
if (x < header->image_width)
{
ptr[0] = tmp[2];
ptr[1] = tmp[1];
ptr[2] = tmp[0];
ptr += 3;
}
type--;
x++;
}
}
}
}
return GRUB_ERR_NONE;
}
static grub_err_t
tga_load_truecolor_rle_R8G8B8A8 (struct grub_video_bitmap *bitmap,
struct grub_tga_header *header,
grub_file_t file)
{
unsigned int x;
unsigned int y;
grub_uint8_t type;
grub_uint8_t *ptr;
grub_uint8_t tmp[4]; /* Size should be max_bpp / 8. */
grub_uint8_t bytes_per_pixel;
bytes_per_pixel = header->image_bpp / 8;
for (y = 0; y < header->image_height; y++)
{
ptr = bitmap->data;
if ((header->image_descriptor & GRUB_TGA_IMAGE_ORIGIN_TOP) != 0)
ptr += y * bitmap->mode_info.pitch;
else
ptr += (header->image_height - 1 - y) * bitmap->mode_info.pitch;
for (x = 0; x < header->image_width;)
{
if (grub_file_read (file, (char *)&type, sizeof (type)) != sizeof(type))
return grub_errno;
if (type & 0x80)
{
/* RLE-encoded packet. */
type &= 0x7f;
type++;
if (grub_file_read (file, (char *)&tmp[0], bytes_per_pixel)
!= bytes_per_pixel)
return grub_errno;
while (type)
{
if (x < header->image_width)
{
ptr[0] = tmp[2];
ptr[1] = tmp[1];
ptr[2] = tmp[0];
ptr[3] = tmp[3];
ptr += 4;
}
type--;
x++;
}
}
else
{
/* RAW-encoded packet. */
type++;
while (type)
{
if (grub_file_read (file, (char *)&tmp[0], bytes_per_pixel)
!= bytes_per_pixel)
return grub_errno;
if (x < header->image_width)
{
ptr[0] = tmp[2];
ptr[1] = tmp[1];
ptr[2] = tmp[0];
ptr[3] = tmp[3];
ptr += 4;
}
type--;
x++;
}
}
}
}
return GRUB_ERR_NONE;
}
static grub_err_t
tga_load_truecolor_R8G8B8 (struct grub_video_bitmap *bitmap,
struct grub_tga_header *header,
grub_file_t file)
{
unsigned int x;
unsigned int y;
grub_uint8_t *ptr;
grub_uint8_t tmp[4]; /* Size should be max_bpp / 8. */
grub_uint8_t bytes_per_pixel;
bytes_per_pixel = header->image_bpp / 8;
for (y = 0; y < header->image_height; y++)
{
ptr = bitmap->data;
if ((header->image_descriptor & GRUB_TGA_IMAGE_ORIGIN_TOP) != 0)
ptr += y * bitmap->mode_info.pitch;
else
ptr += (header->image_height - 1 - y) * bitmap->mode_info.pitch;
for (x = 0; x < header->image_width; x++)
{
if (grub_file_read (file, (char *)&tmp[0], bytes_per_pixel)
!= bytes_per_pixel)
return grub_errno;
ptr[0] = tmp[2];
ptr[1] = tmp[1];
ptr[2] = tmp[0];
ptr += 3;
}
}
return GRUB_ERR_NONE;
}
static grub_err_t
tga_load_truecolor_R8G8B8A8 (struct grub_video_bitmap *bitmap,
struct grub_tga_header *header,
grub_file_t file)
{
unsigned int x;
unsigned int y;
grub_uint8_t *ptr;
grub_uint8_t tmp[4]; /* Size should be max_bpp / 8. */
grub_uint8_t bytes_per_pixel;
bytes_per_pixel = header->image_bpp / 8;
for (y = 0; y < header->image_height; y++)
{
ptr = bitmap->data;
if ((header->image_descriptor & GRUB_TGA_IMAGE_ORIGIN_TOP) != 0)
ptr += y * bitmap->mode_info.pitch;
else
ptr += (header->image_height - 1 - y) * bitmap->mode_info.pitch;
for (x = 0; x < header->image_width; x++)
{
if (grub_file_read (file, (char *)&tmp[0], bytes_per_pixel)
!= bytes_per_pixel)
return grub_errno;
ptr[0] = tmp[2];
ptr[1] = tmp[1];
ptr[2] = tmp[0];
ptr[3] = tmp[3];
ptr += 4;
}
}
return GRUB_ERR_NONE;
}
static grub_err_t
grub_video_reader_tga (struct grub_video_bitmap **bitmap,
const char *filename)
{
grub_file_t file;
grub_ssize_t pos;
struct grub_tga_header header;
int has_alpha;
file = grub_buffile_open (filename, 0);
if (! file)
return grub_errno;
/* TGA Specification states that we SHOULD start by reading
ID from end of file, but we really don't care about that as we are
not going to support developer area & extensions at this point. */
/* Read TGA header from beginning of file. */
if (grub_file_read (file, (char*)&header, sizeof (header))
!= sizeof (header))
{
grub_file_close (file);
return grub_errno;
}
/* Skip ID field. */
pos = grub_file_tell (file);
pos += header.id_length;
grub_file_seek (file, pos);
if (grub_errno != GRUB_ERR_NONE)
{
grub_file_close (file);
return grub_errno;
}
#if defined(TGA_DEBUG)
grub_printf("tga: header\n");
dump_int_field(header.id_length);
dump_int_field(header.color_map_type);
dump_int_field(header.image_type);
dump_int_field(header.color_map_first_index);
dump_int_field(header.color_map_length);
dump_int_field(header.color_map_bpp);
dump_int_field(header.image_x_origin);
dump_int_field(header.image_y_origin);
dump_int_field(header.image_width);
dump_int_field(header.image_height);
dump_int_field(header.image_bpp);
dump_int_field(header.image_descriptor);
#endif
/* Check that bitmap encoding is supported. */
switch (header.image_type)
{
case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_TRUECOLOR:
case GRUB_TGA_IMAGE_TYPE_RLE_TRUECOLOR:
break;
default:
grub_file_close (file);
return grub_error (GRUB_ERR_BAD_FILE_TYPE,
"Unsupported bitmap format (unknown encoding).");
}
/* Check that bitmap depth is supported. */
switch (header.image_bpp)
{
case 24:
has_alpha = 0;
break;
case 32:
has_alpha = 1;
break;
default:
grub_file_close (file);
return grub_error (GRUB_ERR_BAD_FILE_TYPE,
"Unsupported bitmap format (bpp=%d).",
header.image_bpp);
}
/* Allocate bitmap. If there is alpha information store it too. */
if (has_alpha)
{
grub_video_bitmap_create (bitmap, header.image_width,
header.image_height,
GRUB_VIDEO_BLIT_FORMAT_R8G8B8A8);
if (grub_errno != GRUB_ERR_NONE)
{
grub_file_close (file);
return grub_errno;
}
/* Load bitmap data. */
switch (header.image_type)
{
case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_TRUECOLOR:
tga_load_truecolor_R8G8B8A8 (*bitmap, &header, file);
break;
case GRUB_TGA_IMAGE_TYPE_RLE_TRUECOLOR:
tga_load_truecolor_rle_R8G8B8A8 (*bitmap, &header, file);
break;
}
}
else
{
grub_video_bitmap_create (bitmap, header.image_width,
header.image_height,
GRUB_VIDEO_BLIT_FORMAT_R8G8B8);
if (grub_errno != GRUB_ERR_NONE)
{
grub_file_close (file);
return grub_errno;
}
/* Load bitmap data. */
switch (header.image_type)
{
case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_TRUECOLOR:
tga_load_truecolor_R8G8B8 (*bitmap, &header, file);
break;
case GRUB_TGA_IMAGE_TYPE_RLE_TRUECOLOR:
tga_load_truecolor_rle_R8G8B8 (*bitmap, &header, file);
break;
}
}
/* If there was a loading problem, destroy bitmap. */
if (grub_errno != GRUB_ERR_NONE)
{
grub_video_bitmap_destroy (*bitmap);
*bitmap = 0;
}
grub_file_close (file);
return grub_errno;
}
#if defined(TGA_DEBUG)
static grub_err_t
grub_cmd_tgatest (struct grub_arg_list *state __attribute__ ((unused)),
int argc, char **args)
{
struct grub_video_bitmap *bitmap = 0;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required");
grub_video_reader_tga (&bitmap, args[0]);
if (grub_errno != GRUB_ERR_NONE)
return grub_errno;
grub_video_bitmap_destroy (bitmap);
return GRUB_ERR_NONE;
}
#endif
static struct grub_video_bitmap_reader tga_reader = {
.extension = ".tga",
.reader = grub_video_reader_tga,
.next = 0
};
GRUB_MOD_INIT(video_reader_tga)
{
grub_video_bitmap_reader_register (&tga_reader);
#if defined(TGA_DEBUG)
grub_register_command ("tgatest", grub_cmd_tgatest, GRUB_COMMAND_FLAG_BOTH,
"tgatest FILE", "Tests loading of TGA bitmap.", 0);
#endif
}
GRUB_MOD_FINI(video_reader_tga)
{
#if defined(TGA_DEBUG)
grub_unregister_command ("tgatest");
#endif
grub_video_bitmap_reader_unregister (&tga_reader);
}
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