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* grub-core/video/readers/tga.c: Support paletted tga.

This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-09-28 19:22:20 +02:00
parent de6e5ff89b
commit 2b131610d0
2 changed files with 92 additions and 0 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2013-09-28 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/video/readers/tga.c: Support paletted tga.
2013-09-28 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/video/readers/jpeg.c (grub_jpeg_decode_data): Remove

88
grub-core/video/readers/tga.c
View File

@ -85,6 +85,7 @@ struct tga_data
int bpp;
int is_rle;
grub_uint8_t pixel[4];
grub_uint8_t palette[256][3];
struct grub_video_bitmap *bitmap;
grub_file_t file;
unsigned image_width;
@ -119,6 +120,65 @@ fetch_pixel (struct tga_data *data)
return GRUB_ERR_NONE;
}
static grub_err_t
tga_load_palette (struct tga_data *data)
{
grub_size_t len = grub_le_to_cpu32 (data->hdr.color_map_length) * 3;
if (len > sizeof (data->palette))
len = sizeof (data->palette);
if (grub_file_read (data->file, &data->palette, len)
!= (grub_ssize_t) len)
return grub_errno;
#ifndef GRUB_CPU_WORDS_BIGENDIAN
{
grub_size_t i;
for (i = 0; 3 * i < len; i++)
{
grub_uint8_t t;
t = data->palette[i][0];
data->palette[i][0] = data->palette[i][2];
data->palette[i][2] = t;
}
}
#endif
return GRUB_ERR_NONE;
}
static grub_err_t
tga_load_index_color (struct tga_data *data)
{
unsigned int x;
unsigned int y;
grub_uint8_t *ptr;
for (y = 0; y < data->image_height; y++)
{
ptr = data->bitmap->data;
if ((data->hdr.image_descriptor & GRUB_TGA_IMAGE_ORIGIN_TOP) != 0)
ptr += y * data->bitmap->mode_info.pitch;
else
ptr += (data->image_height - 1 - y) * data->bitmap->mode_info.pitch;
for (x = 0; x < data->image_width; x++)
{
grub_err_t err;
err = fetch_pixel (data);
if (err)
return err;
ptr[0] = data->palette[data->pixel[0]][0];
ptr[1] = data->palette[data->pixel[0]][1];
ptr[2] = data->palette[data->pixel[0]][2];
ptr += 3;
}
}
return GRUB_ERR_NONE;
}
static grub_err_t
tga_load_grayscale (struct tga_data *data)
{
@ -285,10 +345,12 @@ grub_video_reader_tga (struct grub_video_bitmap **bitmap,
{
case GRUB_TGA_IMAGE_TYPE_RLE_TRUECOLOR:
case GRUB_TGA_IMAGE_TYPE_RLE_BLACK_AND_WHITE:
case GRUB_TGA_IMAGE_TYPE_RLE_INDEXCOLOR:
data.uses_rle = 1;
break;
case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_TRUECOLOR:
case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_BLACK_AND_WHITE:
case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_INDEXCOLOR:
data.uses_rle = 0;
break;
@ -326,6 +388,32 @@ grub_video_reader_tga (struct grub_video_bitmap **bitmap,
tga_load_grayscale (&data);
break;
case GRUB_TGA_IMAGE_TYPE_RLE_INDEXCOLOR:
case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_INDEXCOLOR:
if (data.hdr.image_bpp != 8
|| data.hdr.color_map_bpp != 24
|| data.hdr.color_map_first_index != 0)
{
grub_file_close (data.file);
return grub_error (GRUB_ERR_BAD_FILE_TYPE,
"unsupported bitmap format (bpp=%d)",
data.hdr.image_bpp);
}
grub_video_bitmap_create (bitmap, data.image_width,
data.image_height,
GRUB_VIDEO_BLIT_FORMAT_RGB_888);
if (grub_errno != GRUB_ERR_NONE)
{
grub_file_close (data.file);
return grub_errno;
}
data.bitmap = *bitmap;
/* Load bitmap data. */
tga_load_palette (&data);
tga_load_index_color (&data);
break;
case GRUB_TGA_IMAGE_TYPE_RLE_TRUECOLOR:
case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_TRUECOLOR:
switch (data.hdr.image_bpp)