* grub-core/video/readers/jpeg.c: Support grayscale.
This commit is contained in:
parent
0340bdbc22
commit
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2 changed files with 52 additions and 26 deletions
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@ -1,3 +1,7 @@
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2013-09-24 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/video/readers/jpeg.c: Support grayscale.
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2013-09-24 Jon McCune <jonmccune@google.com>
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2013-09-24 Jon McCune <jonmccune@google.com>
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* grub-core/commands/loadenv.c: Support skipping signature check
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* grub-core/commands/loadenv.c: Support skipping signature check
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@ -33,21 +33,24 @@ GRUB_MOD_LICENSE ("GPLv3+");
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#define JPEG_SAMPLING_1x1 0x11
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#define JPEG_SAMPLING_1x1 0x11
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#define JPEG_MARKER_SOI 0xd8
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enum
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#define JPEG_MARKER_EOI 0xd9
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{
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#define JPEG_MARKER_DHT 0xc4
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JPEG_MARKER_SOF0 = 0xc0,
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#define JPEG_MARKER_DQT 0xdb
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JPEG_MARKER_DHT = 0xc4,
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#define JPEG_MARKER_SOF0 0xc0
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JPEG_MARKER_SOI = 0xd8,
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#define JPEG_MARKER_SOS 0xda
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JPEG_MARKER_EOI = 0xd9,
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#define JPEG_MARKER_DRI 0xdd
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JPEG_MARKER_RST0 = 0xd0,
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#define JPEG_MARKER_RST0 0xd0
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JPEG_MARKER_RST1 = 0xd1,
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#define JPEG_MARKER_RST1 0xd1
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JPEG_MARKER_RST2 = 0xd2,
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#define JPEG_MARKER_RST2 0xd2
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JPEG_MARKER_RST3 = 0xd3,
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#define JPEG_MARKER_RST3 0xd3
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JPEG_MARKER_RST4 = 0xd4,
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#define JPEG_MARKER_RST4 0xd4
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JPEG_MARKER_RST5 = 0xd5,
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#define JPEG_MARKER_RST5 0xd5
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JPEG_MARKER_RST6 = 0xd6,
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#define JPEG_MARKER_RST6 0xd6
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JPEG_MARKER_RST7 = 0xd7,
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#define JPEG_MARKER_RST7 0xd7
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JPEG_MARKER_SOS = 0xda,
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JPEG_MARKER_DQT = 0xdb,
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JPEG_MARKER_DRI = 0xdd,
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};
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#define SHIFT_BITS 8
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#define SHIFT_BITS 8
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#define CONST(x) ((int) ((x) * (1L << SHIFT_BITS) + 0.5))
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#define CONST(x) ((int) ((x) * (1L << SHIFT_BITS) + 0.5))
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@ -97,6 +100,8 @@ struct grub_jpeg_data
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int dc_value[3];
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int dc_value[3];
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int color_components;
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int bit_mask, bit_save;
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int bit_mask, bit_save;
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};
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};
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@ -294,9 +299,10 @@ grub_jpeg_decode_sof (struct grub_jpeg_data *data)
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return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid image size");
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return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid image size");
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cc = grub_jpeg_get_byte (data);
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cc = grub_jpeg_get_byte (data);
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if (cc != 3)
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if (cc != 1 && cc != 3)
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return grub_error (GRUB_ERR_BAD_FILE_TYPE,
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return grub_error (GRUB_ERR_BAD_FILE_TYPE,
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"jpeg: component count must be 3");
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"jpeg: component count must be 1 or 3");
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data->color_components = cc;
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for (i = 0; i < cc; i++)
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for (i = 0; i < cc; i++)
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{
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{
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@ -571,9 +577,10 @@ grub_jpeg_decode_sos (struct grub_jpeg_data *data)
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cc = grub_jpeg_get_byte (data);
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cc = grub_jpeg_get_byte (data);
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if (cc != 3)
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if (cc != 3 && cc != 1)
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return grub_error (GRUB_ERR_BAD_FILE_TYPE,
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return grub_error (GRUB_ERR_BAD_FILE_TYPE,
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"jpeg: component count must be 3");
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"jpeg: component count must be 1 or 3");
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data->color_components = cc;
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for (i = 0; i < cc; i++)
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for (i = 0; i < cc; i++)
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{
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{
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@ -626,8 +633,13 @@ grub_jpeg_decode_data (struct grub_jpeg_data *data)
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for (c2 = 0; c2 < data->hs; c2++)
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for (c2 = 0; c2 < data->hs; c2++)
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grub_jpeg_decode_du (data, 0, data->ydu[r2 * 2 + c2]);
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grub_jpeg_decode_du (data, 0, data->ydu[r2 * 2 + c2]);
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grub_jpeg_decode_du (data, 1, data->cbdu);
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if (data->color_components >= 3)
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grub_jpeg_decode_du (data, 2, data->crdu);
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{
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grub_jpeg_decode_du (data, 1, data->cbdu);
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grub_jpeg_decode_du (data, 2, data->crdu);
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}
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grub_memset (&data->cbdu, 0, sizeof (data->cbdu));
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grub_memset (&data->crdu, 0, sizeof (data->crdu));
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if (grub_errno)
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if (grub_errno)
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return grub_errno;
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return grub_errno;
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@ -639,14 +651,24 @@ grub_jpeg_decode_data (struct grub_jpeg_data *data)
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for (r2 = 0; r2 < nr2; r2++, ptr2 += (data->image_width - nc2) * 3)
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for (r2 = 0; r2 < nr2; r2++, ptr2 += (data->image_width - nc2) * 3)
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for (c2 = 0; c2 < nc2; c2++, ptr2 += 3)
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for (c2 = 0; c2 < nc2; c2++, ptr2 += 3)
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{
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{
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int i0, yy, cr, cb;
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int i0, yy;
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i0 = (r2 / data->vs) * 8 + (c2 / data->hs);
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i0 = (r2 / data->vs) * 8 + (c2 / data->hs);
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cr = data->crdu[i0];
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cb = data->cbdu[i0];
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yy = data->ydu[(r2 / 8) * 2 + (c2 / 8)][(r2 % 8) * 8 + (c2 % 8)];
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yy = data->ydu[(r2 / 8) * 2 + (c2 / 8)][(r2 % 8) * 8 + (c2 % 8)];
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grub_jpeg_ycrcb_to_rgb (yy, cr, cb, ptr2);
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if (data->color_components >= 3)
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{
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int cr, cb;
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cr = data->crdu[i0];
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cb = data->cbdu[i0];
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grub_jpeg_ycrcb_to_rgb (yy, cr, cb, ptr2);
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}
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else
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{
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ptr2[0] = yy;
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ptr2[1] = yy;
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ptr2[2] = yy;
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}
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}
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}
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}
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}
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@ -778,7 +800,7 @@ grub_video_reader_jpeg (struct grub_video_bitmap **bitmap,
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#if defined(JPEG_DEBUG)
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#if defined(JPEG_DEBUG)
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static grub_err_t
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static grub_err_t
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grub_cmd_jpegtest (grub_command_t cmd __attribute__ ((unused)),
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grub_cmd_jpegtest (grub_command_t cmdd __attribute__ ((unused)),
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int argc, char **args)
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int argc, char **args)
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{
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{
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struct grub_video_bitmap *bitmap = 0;
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struct grub_video_bitmap *bitmap = 0;
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