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-rw-r--r--grub-core/video/readers/jpeg.c879
-rw-r--r--grub-core/video/readers/png.c1166
-rw-r--r--grub-core/video/readers/tga.c511
3 files changed, 2556 insertions, 0 deletions
diff --git a/grub-core/video/readers/jpeg.c b/grub-core/video/readers/jpeg.c
new file mode 100644
index 0000000..e31602f
--- /dev/null
+++ b/grub-core/video/readers/jpeg.c
@@ -0,0 +1,879 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2008 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/bufio.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+/* Uncomment following define to enable JPEG debug. */
+//#define JPEG_DEBUG
+
+#define JPEG_ESC_CHAR 0xFF
+
+#define JPEG_SAMPLING_1x1 0x11
+
+enum
+ {
+ JPEG_MARKER_SOF0 = 0xc0,
+ JPEG_MARKER_DHT = 0xc4,
+ JPEG_MARKER_SOI = 0xd8,
+ JPEG_MARKER_EOI = 0xd9,
+ JPEG_MARKER_RST0 = 0xd0,
+ JPEG_MARKER_RST1 = 0xd1,
+ JPEG_MARKER_RST2 = 0xd2,
+ JPEG_MARKER_RST3 = 0xd3,
+ JPEG_MARKER_RST4 = 0xd4,
+ JPEG_MARKER_RST5 = 0xd5,
+ JPEG_MARKER_RST6 = 0xd6,
+ JPEG_MARKER_RST7 = 0xd7,
+ JPEG_MARKER_SOS = 0xda,
+ JPEG_MARKER_DQT = 0xdb,
+ JPEG_MARKER_DRI = 0xdd,
+ };
+
+#define SHIFT_BITS 8
+#define CONST(x) ((int) ((x) * (1L << SHIFT_BITS) + 0.5))
+
+#define JPEG_UNIT_SIZE 8
+
+static const grub_uint8_t jpeg_zigzag_order[64] = {
+ 0, 1, 8, 16, 9, 2, 3, 10,
+ 17, 24, 32, 25, 18, 11, 4, 5,
+ 12, 19, 26, 33, 40, 48, 41, 34,
+ 27, 20, 13, 6, 7, 14, 21, 28,
+ 35, 42, 49, 56, 57, 50, 43, 36,
+ 29, 22, 15, 23, 30, 37, 44, 51,
+ 58, 59, 52, 45, 38, 31, 39, 46,
+ 53, 60, 61, 54, 47, 55, 62, 63
+};
+
+#ifdef JPEG_DEBUG
+static grub_command_t cmd;
+#endif
+
+typedef int jpeg_data_unit_t[64];
+
+struct grub_jpeg_data
+{
+ grub_file_t file;
+ struct grub_video_bitmap **bitmap;
+ grub_uint8_t *bitmap_ptr;
+
+ unsigned image_width;
+ unsigned image_height;
+
+ grub_uint8_t *huff_value[4];
+ int huff_offset[4][16];
+ int huff_maxval[4][16];
+
+ grub_uint8_t quan_table[2][64];
+ int comp_index[3][3];
+
+ jpeg_data_unit_t ydu[4];
+ jpeg_data_unit_t crdu;
+ jpeg_data_unit_t cbdu;
+
+ unsigned log_vs, log_hs;
+ int dri;
+ unsigned r1;
+
+ int dc_value[3];
+
+ int color_components;
+
+ int bit_mask, bit_save;
+};
+
+static grub_uint8_t
+grub_jpeg_get_byte (struct grub_jpeg_data *data)
+{
+ grub_uint8_t r;
+
+ r = 0;
+ grub_file_read (data->file, &r, 1);
+
+ return r;
+}
+
+static grub_uint16_t
+grub_jpeg_get_word (struct grub_jpeg_data *data)
+{
+ grub_uint16_t r;
+
+ r = 0;
+ grub_file_read (data->file, &r, sizeof (grub_uint16_t));
+
+ return grub_be_to_cpu16 (r);
+}
+
+static int
+grub_jpeg_get_bit (struct grub_jpeg_data *data)
+{
+ int ret;
+
+ if (data->bit_mask == 0)
+ {
+ data->bit_save = grub_jpeg_get_byte (data);
+ if (data->bit_save == JPEG_ESC_CHAR)
+ {
+ if (grub_jpeg_get_byte (data) != 0)
+ {
+ grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: invalid 0xFF in data stream");
+ return 0;
+ }
+ }
+ data->bit_mask = 0x80;
+ }
+
+ ret = ((data->bit_save & data->bit_mask) != 0);
+ data->bit_mask >>= 1;
+ return ret;
+}
+
+static int
+grub_jpeg_get_number (struct grub_jpeg_data *data, int num)
+{
+ int value, i, msb;
+
+ if (num == 0)
+ return 0;
+
+ msb = value = grub_jpeg_get_bit (data);
+ for (i = 1; i < num; i++)
+ value = (value << 1) + (grub_jpeg_get_bit (data) != 0);
+ if (!msb)
+ value += 1 - (1 << num);
+
+ return value;
+}
+
+static int
+grub_jpeg_get_huff_code (struct grub_jpeg_data *data, int id)
+{
+ int code;
+ unsigned i;
+
+ code = 0;
+ for (i = 0; i < ARRAY_SIZE (data->huff_maxval[id]); i++)
+ {
+ code <<= 1;
+ if (grub_jpeg_get_bit (data))
+ code++;
+ if (code < data->huff_maxval[id][i])
+ return data->huff_value[id][code + data->huff_offset[id][i]];
+ }
+ grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: huffman decode fails");
+ return 0;
+}
+
+static grub_err_t
+grub_jpeg_decode_huff_table (struct grub_jpeg_data *data)
+{
+ int id, ac, n, base, ofs;
+ grub_uint32_t next_marker;
+ grub_uint8_t count[16];
+ unsigned i;
+
+ next_marker = data->file->offset;
+ next_marker += grub_jpeg_get_word (data);
+
+ while (data->file->offset + sizeof (count) + 1 <= next_marker)
+ {
+ id = grub_jpeg_get_byte (data);
+ ac = (id >> 4) & 1;
+ id &= 0xF;
+ if (id > 1)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: too many huffman tables");
+
+ if (grub_file_read (data->file, &count, sizeof (count)) !=
+ sizeof (count))
+ return grub_errno;
+
+ n = 0;
+ for (i = 0; i < ARRAY_SIZE (count); i++)
+ n += count[i];
+
+ id += ac * 2;
+ data->huff_value[id] = grub_malloc (n);
+ if (grub_errno)
+ return grub_errno;
+
+ if (grub_file_read (data->file, data->huff_value[id], n) != n)
+ return grub_errno;
+
+ base = 0;
+ ofs = 0;
+ for (i = 0; i < ARRAY_SIZE (count); i++)
+ {
+ base += count[i];
+ ofs += count[i];
+
+ data->huff_maxval[id][i] = base;
+ data->huff_offset[id][i] = ofs - base;
+
+ base <<= 1;
+ }
+ }
+
+ if (data->file->offset != next_marker)
+ grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: extra byte in huffman table");
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_jpeg_decode_quan_table (struct grub_jpeg_data *data)
+{
+ int id;
+ grub_uint32_t next_marker;
+
+ next_marker = data->file->offset;
+ next_marker += grub_jpeg_get_word (data);
+
+ if (next_marker > data->file->size)
+ {
+ /* Should never be set beyond the size of the file. */
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid next reference");
+ }
+
+ while (data->file->offset + sizeof (data->quan_table[id]) + 1
+ <= next_marker)
+ {
+ id = grub_jpeg_get_byte (data);
+ if (id >= 0x10) /* Upper 4-bit is precision. */
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: only 8-bit precision is supported");
+
+ if (id > 1)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: too many quantization tables");
+
+ if (grub_file_read (data->file, &data->quan_table[id],
+ sizeof (data->quan_table[id]))
+ != sizeof (data->quan_table[id]))
+ return grub_errno;
+
+ }
+
+ if (data->file->offset != next_marker)
+ grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: extra byte in quantization table");
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_jpeg_decode_sof (struct grub_jpeg_data *data)
+{
+ int i, cc;
+ grub_uint32_t next_marker;
+
+ next_marker = data->file->offset;
+ next_marker += grub_jpeg_get_word (data);
+
+ if (grub_jpeg_get_byte (data) != 8)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: only 8-bit precision is supported");
+
+ data->image_height = grub_jpeg_get_word (data);
+ data->image_width = grub_jpeg_get_word (data);
+
+ if ((!data->image_height) || (!data->image_width))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid image size");
+
+ cc = grub_jpeg_get_byte (data);
+ if (cc != 1 && cc != 3)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: component count must be 1 or 3");
+ data->color_components = cc;
+
+ for (i = 0; i < cc; i++)
+ {
+ int id, ss;
+
+ id = grub_jpeg_get_byte (data) - 1;
+ if ((id < 0) || (id >= 3))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid index");
+
+ ss = grub_jpeg_get_byte (data); /* Sampling factor. */
+ if (!id)
+ {
+ grub_uint8_t vs, hs;
+ vs = ss & 0xF; /* Vertical sampling. */
+ hs = ss >> 4; /* Horizontal sampling. */
+ if ((vs > 2) || (hs > 2) || (vs == 0) || (hs == 0))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: sampling method not supported");
+ data->log_vs = (vs == 2);
+ data->log_hs = (hs == 2);
+ }
+ else if (ss != JPEG_SAMPLING_1x1)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: sampling method not supported");
+
+ data->comp_index[id][0] = grub_jpeg_get_byte (data);
+ if (data->comp_index[id][0] > 1)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: too many quantization tables");
+ }
+
+ if (data->file->offset != next_marker)
+ grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: extra byte in sof");
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_jpeg_decode_dri (struct grub_jpeg_data *data)
+{
+ if (grub_jpeg_get_word (data) != 4)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: DRI marker length must be 4");
+
+ data->dri = grub_jpeg_get_word (data);
+
+ return grub_errno;
+}
+
+static void
+grub_jpeg_idct_transform (jpeg_data_unit_t du)
+{
+ int *pd;
+ int i;
+ int t0, t1, t2, t3, t4, t5, t6, t7;
+ int v0, v1, v2, v3, v4;
+
+ pd = du;
+ for (i = 0; i < JPEG_UNIT_SIZE; i++, pd++)
+ {
+ if ((pd[JPEG_UNIT_SIZE * 1] | pd[JPEG_UNIT_SIZE * 2] |
+ pd[JPEG_UNIT_SIZE * 3] | pd[JPEG_UNIT_SIZE * 4] |
+ pd[JPEG_UNIT_SIZE * 5] | pd[JPEG_UNIT_SIZE * 6] |
+ pd[JPEG_UNIT_SIZE * 7]) == 0)
+ {
+ pd[JPEG_UNIT_SIZE * 0] <<= SHIFT_BITS;
+
+ pd[JPEG_UNIT_SIZE * 1] = pd[JPEG_UNIT_SIZE * 2]
+ = pd[JPEG_UNIT_SIZE * 3] = pd[JPEG_UNIT_SIZE * 4]
+ = pd[JPEG_UNIT_SIZE * 5] = pd[JPEG_UNIT_SIZE * 6]
+ = pd[JPEG_UNIT_SIZE * 7] = pd[JPEG_UNIT_SIZE * 0];
+
+ continue;
+ }
+
+ t0 = pd[JPEG_UNIT_SIZE * 0];
+ t1 = pd[JPEG_UNIT_SIZE * 2];
+ t2 = pd[JPEG_UNIT_SIZE * 4];
+ t3 = pd[JPEG_UNIT_SIZE * 6];
+
+ v4 = (t1 + t3) * CONST (0.541196100);
+
+ v0 = ((t0 + t2) << SHIFT_BITS);
+ v1 = ((t0 - t2) << SHIFT_BITS);
+ v2 = v4 - t3 * CONST (1.847759065);
+ v3 = v4 + t1 * CONST (0.765366865);
+
+ t0 = v0 + v3;
+ t3 = v0 - v3;
+ t1 = v1 + v2;
+ t2 = v1 - v2;
+
+ t4 = pd[JPEG_UNIT_SIZE * 7];
+ t5 = pd[JPEG_UNIT_SIZE * 5];
+ t6 = pd[JPEG_UNIT_SIZE * 3];
+ t7 = pd[JPEG_UNIT_SIZE * 1];
+
+ v0 = t4 + t7;
+ v1 = t5 + t6;
+ v2 = t4 + t6;
+ v3 = t5 + t7;
+
+ v4 = (v2 + v3) * CONST (1.175875602);
+
+ v0 *= CONST (0.899976223);
+ v1 *= CONST (2.562915447);
+ v2 = v2 * CONST (1.961570560) - v4;
+ v3 = v3 * CONST (0.390180644) - v4;
+
+ t4 = t4 * CONST (0.298631336) - v0 - v2;
+ t5 = t5 * CONST (2.053119869) - v1 - v3;
+ t6 = t6 * CONST (3.072711026) - v1 - v2;
+ t7 = t7 * CONST (1.501321110) - v0 - v3;
+
+ pd[JPEG_UNIT_SIZE * 0] = t0 + t7;
+ pd[JPEG_UNIT_SIZE * 7] = t0 - t7;
+ pd[JPEG_UNIT_SIZE * 1] = t1 + t6;
+ pd[JPEG_UNIT_SIZE * 6] = t1 - t6;
+ pd[JPEG_UNIT_SIZE * 2] = t2 + t5;
+ pd[JPEG_UNIT_SIZE * 5] = t2 - t5;
+ pd[JPEG_UNIT_SIZE * 3] = t3 + t4;
+ pd[JPEG_UNIT_SIZE * 4] = t3 - t4;
+ }
+
+ pd = du;
+ for (i = 0; i < JPEG_UNIT_SIZE; i++, pd += JPEG_UNIT_SIZE)
+ {
+ if ((pd[1] | pd[2] | pd[3] | pd[4] | pd[5] | pd[6] | pd[7]) == 0)
+ {
+ pd[0] >>= (SHIFT_BITS + 3);
+ pd[1] = pd[2] = pd[3] = pd[4] = pd[5] = pd[6] = pd[7] = pd[0];
+ continue;
+ }
+
+ v4 = (pd[2] + pd[6]) * CONST (0.541196100);
+
+ v0 = (pd[0] + pd[4]) << SHIFT_BITS;
+ v1 = (pd[0] - pd[4]) << SHIFT_BITS;
+ v2 = v4 - pd[6] * CONST (1.847759065);
+ v3 = v4 + pd[2] * CONST (0.765366865);
+
+ t0 = v0 + v3;
+ t3 = v0 - v3;
+ t1 = v1 + v2;
+ t2 = v1 - v2;
+
+ t4 = pd[7];
+ t5 = pd[5];
+ t6 = pd[3];
+ t7 = pd[1];
+
+ v0 = t4 + t7;
+ v1 = t5 + t6;
+ v2 = t4 + t6;
+ v3 = t5 + t7;
+
+ v4 = (v2 + v3) * CONST (1.175875602);
+
+ v0 *= CONST (0.899976223);
+ v1 *= CONST (2.562915447);
+ v2 = v2 * CONST (1.961570560) - v4;
+ v3 = v3 * CONST (0.390180644) - v4;
+
+ t4 = t4 * CONST (0.298631336) - v0 - v2;
+ t5 = t5 * CONST (2.053119869) - v1 - v3;
+ t6 = t6 * CONST (3.072711026) - v1 - v2;
+ t7 = t7 * CONST (1.501321110) - v0 - v3;
+
+ pd[0] = (t0 + t7) >> (SHIFT_BITS * 2 + 3);
+ pd[7] = (t0 - t7) >> (SHIFT_BITS * 2 + 3);
+ pd[1] = (t1 + t6) >> (SHIFT_BITS * 2 + 3);
+ pd[6] = (t1 - t6) >> (SHIFT_BITS * 2 + 3);
+ pd[2] = (t2 + t5) >> (SHIFT_BITS * 2 + 3);
+ pd[5] = (t2 - t5) >> (SHIFT_BITS * 2 + 3);
+ pd[3] = (t3 + t4) >> (SHIFT_BITS * 2 + 3);
+ pd[4] = (t3 - t4) >> (SHIFT_BITS * 2 + 3);
+ }
+
+ for (i = 0; i < JPEG_UNIT_SIZE * JPEG_UNIT_SIZE; i++)
+ {
+ du[i] += 128;
+
+ if (du[i] < 0)
+ du[i] = 0;
+ if (du[i] > 255)
+ du[i] = 255;
+ }
+}
+
+static void
+grub_jpeg_decode_du (struct grub_jpeg_data *data, int id, jpeg_data_unit_t du)
+{
+ int h1, h2, qt;
+ unsigned pos;
+
+ grub_memset (du, 0, sizeof (jpeg_data_unit_t));
+
+ qt = data->comp_index[id][0];
+ h1 = data->comp_index[id][1];
+ h2 = data->comp_index[id][2];
+
+ data->dc_value[id] +=
+ grub_jpeg_get_number (data, grub_jpeg_get_huff_code (data, h1));
+
+ du[0] = data->dc_value[id] * (int) data->quan_table[qt][0];
+ pos = 1;
+ while (pos < ARRAY_SIZE (data->quan_table[qt]))
+ {
+ int num, val;
+
+ num = grub_jpeg_get_huff_code (data, h2);
+ if (!num)
+ break;
+
+ val = grub_jpeg_get_number (data, num & 0xF);
+ num >>= 4;
+ pos += num;
+
+ if (pos >= ARRAY_SIZE (jpeg_zigzag_order))
+ {
+ grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: invalid position in zigzag order!?");
+ return;
+ }
+
+ du[jpeg_zigzag_order[pos]] = val * (int) data->quan_table[qt][pos];
+ pos++;
+ }
+
+ grub_jpeg_idct_transform (du);
+}
+
+static void
+grub_jpeg_ycrcb_to_rgb (int yy, int cr, int cb, grub_uint8_t * rgb)
+{
+ int dd;
+
+ cr -= 128;
+ cb -= 128;
+
+ /* Red */
+ dd = yy + ((cr * CONST (1.402)) >> SHIFT_BITS);
+ if (dd < 0)
+ dd = 0;
+ if (dd > 255)
+ dd = 255;
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+ rgb[2] = dd;
+#else
+ *(rgb++) = dd;
+#endif
+
+ /* Green */
+ dd = yy - ((cb * CONST (0.34414) + cr * CONST (0.71414)) >> SHIFT_BITS);
+ if (dd < 0)
+ dd = 0;
+ if (dd > 255)
+ dd = 255;
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+ rgb[1] = dd;
+#else
+ *(rgb++) = dd;
+#endif
+
+ /* Blue */
+ dd = yy + ((cb * CONST (1.772)) >> SHIFT_BITS);
+ if (dd < 0)
+ dd = 0;
+ if (dd > 255)
+ dd = 255;
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+ rgb[0] = dd;
+ rgb += 3;
+#else
+ *(rgb++) = dd;
+#endif
+}
+
+static grub_err_t
+grub_jpeg_decode_sos (struct grub_jpeg_data *data)
+{
+ int i, cc;
+ grub_uint32_t data_offset;
+
+ data_offset = data->file->offset;
+ data_offset += grub_jpeg_get_word (data);
+
+ cc = grub_jpeg_get_byte (data);
+
+ if (cc != 3 && cc != 1)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: component count must be 1 or 3");
+ data->color_components = cc;
+
+ for (i = 0; i < cc; i++)
+ {
+ int id, ht;
+
+ id = grub_jpeg_get_byte (data) - 1;
+ if ((id < 0) || (id >= 3))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid index");
+
+ ht = grub_jpeg_get_byte (data);
+ data->comp_index[id][1] = (ht >> 4);
+ data->comp_index[id][2] = (ht & 0xF) + 2;
+
+ if ((data->comp_index[id][1] < 0) || (data->comp_index[id][1] > 3) ||
+ (data->comp_index[id][2] < 0) || (data->comp_index[id][2] > 3))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid hufftable index");
+ }
+
+ grub_jpeg_get_byte (data); /* Skip 3 unused bytes. */
+ grub_jpeg_get_word (data);
+
+ if (data->file->offset != data_offset)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: extra byte in sos");
+
+ if (grub_video_bitmap_create (data->bitmap, data->image_width,
+ data->image_height,
+ GRUB_VIDEO_BLIT_FORMAT_RGB_888))
+ return grub_errno;
+
+ data->bitmap_ptr = (*data->bitmap)->data;
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_jpeg_decode_data (struct grub_jpeg_data *data)
+{
+ unsigned c1, vb, hb, nr1, nc1;
+ int rst = data->dri;
+
+ vb = 8 << data->log_vs;
+ hb = 8 << data->log_hs;
+ nr1 = (data->image_height + vb - 1) >> (3 + data->log_vs);
+ nc1 = (data->image_width + hb - 1) >> (3 + data->log_hs);
+
+ if (data->bitmap_ptr == NULL)
+ return grub_error(GRUB_ERR_BAD_FILE_TYPE,
+ "jpeg: attempted to decode data before start of stream");
+
+ for (; data->r1 < nr1 && (!data->dri || rst);
+ data->r1++, data->bitmap_ptr += (vb * data->image_width - hb * nc1) * 3)
+ for (c1 = 0; c1 < nc1 && (!data->dri || rst);
+ c1++, rst--, data->bitmap_ptr += hb * 3)
+ {
+ unsigned r2, c2, nr2, nc2;
+ grub_uint8_t *ptr2;
+
+ for (r2 = 0; r2 < (1U << data->log_vs); r2++)
+ for (c2 = 0; c2 < (1U << data->log_hs); c2++)
+ grub_jpeg_decode_du (data, 0, data->ydu[r2 * 2 + c2]);
+
+ if (data->color_components >= 3)
+ {
+ grub_jpeg_decode_du (data, 1, data->cbdu);
+ grub_jpeg_decode_du (data, 2, data->crdu);
+ }
+
+ if (grub_errno)
+ return grub_errno;
+
+ nr2 = (data->r1 == nr1 - 1) ? (data->image_height - data->r1 * vb) : vb;
+ nc2 = (c1 == nc1 - 1) ? (data->image_width - c1 * hb) : hb;
+
+ ptr2 = data->bitmap_ptr;
+ for (r2 = 0; r2 < nr2; r2++, ptr2 += (data->image_width - nc2) * 3)
+ for (c2 = 0; c2 < nc2; c2++, ptr2 += 3)
+ {
+ unsigned i0;
+ int yy;
+
+ i0 = (r2 >> data->log_vs) * 8 + (c2 >> data->log_hs);
+ yy = data->ydu[(r2 / 8) * 2 + (c2 / 8)][(r2 % 8) * 8 + (c2 % 8)];
+
+ if (data->color_components >= 3)
+ {
+ int cr, cb;
+ cr = data->crdu[i0];
+ cb = data->cbdu[i0];
+ grub_jpeg_ycrcb_to_rgb (yy, cr, cb, ptr2);
+ }
+ else
+ {
+ ptr2[0] = yy;
+ ptr2[1] = yy;
+ ptr2[2] = yy;
+ }
+ }
+ }
+
+ return grub_errno;
+}
+
+static void
+grub_jpeg_reset (struct grub_jpeg_data *data)
+{
+ data->bit_mask = 0x0;
+
+ data->dc_value[0] = 0;
+ data->dc_value[1] = 0;
+ data->dc_value[2] = 0;
+}
+
+static grub_uint8_t
+grub_jpeg_get_marker (struct grub_jpeg_data *data)
+{
+ grub_uint8_t r;
+
+ r = grub_jpeg_get_byte (data);
+
+ if (r != JPEG_ESC_CHAR)
+ {
+ grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid maker");
+ return 0;
+ }
+
+ return grub_jpeg_get_byte (data);
+}
+
+static grub_err_t
+grub_jpeg_decode_jpeg (struct grub_jpeg_data *data)
+{
+ if (grub_jpeg_get_marker (data) != JPEG_MARKER_SOI) /* Start Of Image. */
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: invalid jpeg file");
+
+ while (grub_errno == 0)
+ {
+ grub_uint8_t marker;
+
+ marker = grub_jpeg_get_marker (data);
+ if (grub_errno)
+ break;
+
+ grub_dprintf ("jpeg", "jpeg marker: %x\n", marker);
+
+ switch (marker)
+ {
+ case JPEG_MARKER_DHT: /* Define Huffman Table. */
+ grub_jpeg_decode_huff_table (data);
+ break;
+ case JPEG_MARKER_DQT: /* Define Quantization Table. */
+ grub_jpeg_decode_quan_table (data);
+ break;
+ case JPEG_MARKER_SOF0: /* Start Of Frame 0. */
+ grub_jpeg_decode_sof (data);
+ break;
+ case JPEG_MARKER_DRI: /* Define Restart Interval. */
+ grub_jpeg_decode_dri (data);
+ break;
+ case JPEG_MARKER_SOS: /* Start Of Scan. */
+ if (grub_jpeg_decode_sos (data))
+ break;
+ /* FALLTHROUGH */
+ case JPEG_MARKER_RST0: /* Restart. */
+ case JPEG_MARKER_RST1:
+ case JPEG_MARKER_RST2:
+ case JPEG_MARKER_RST3:
+ case JPEG_MARKER_RST4:
+ case JPEG_MARKER_RST5:
+ case JPEG_MARKER_RST6:
+ case JPEG_MARKER_RST7:
+ grub_jpeg_decode_data (data);
+ grub_jpeg_reset (data);
+ break;
+ case JPEG_MARKER_EOI: /* End Of Image. */
+ return grub_errno;
+ default: /* Skip unrecognized marker. */
+ {
+ grub_uint16_t sz;
+
+ sz = grub_jpeg_get_word (data);
+ if (grub_errno)
+ return (grub_errno);
+ grub_file_seek (data->file, data->file->offset + sz - 2);
+ }
+ }
+ }
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_video_reader_jpeg (struct grub_video_bitmap **bitmap,
+ const char *filename)
+{
+ grub_file_t file;
+ struct grub_jpeg_data *data;
+
+ file = grub_buffile_open (filename, GRUB_FILE_TYPE_PIXMAP, 0);
+ if (!file)
+ return grub_errno;
+
+ data = grub_zalloc (sizeof (*data));
+ if (data != NULL)
+ {
+ int i;
+
+ data->file = file;
+ data->bitmap = bitmap;
+ grub_jpeg_decode_jpeg (data);
+
+ for (i = 0; i < 4; i++)
+ grub_free (data->huff_value[i]);
+
+ grub_free (data);
+ }
+
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_video_bitmap_destroy (*bitmap);
+ *bitmap = 0;
+ }
+
+ grub_file_close (file);
+ return grub_errno;
+}
+
+#if defined(JPEG_DEBUG)
+static grub_err_t
+grub_cmd_jpegtest (grub_command_t cmdd __attribute__ ((unused)),
+ int argc, char **args)
+{
+ struct grub_video_bitmap *bitmap = 0;
+
+ if (argc != 1)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+
+ grub_video_reader_jpeg (&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 jpg_reader = {
+ .extension = ".jpg",
+ .reader = grub_video_reader_jpeg,
+ .next = 0
+};
+
+static struct grub_video_bitmap_reader jpeg_reader = {
+ .extension = ".jpeg",
+ .reader = grub_video_reader_jpeg,
+ .next = 0
+};
+
+GRUB_MOD_INIT (jpeg)
+{
+ grub_video_bitmap_reader_register (&jpg_reader);
+ grub_video_bitmap_reader_register (&jpeg_reader);
+#if defined(JPEG_DEBUG)
+ cmd = grub_register_command ("jpegtest", grub_cmd_jpegtest,
+ "FILE", "Tests loading of JPEG bitmap.");
+#endif
+}
+
+GRUB_MOD_FINI (jpeg)
+{
+#if defined(JPEG_DEBUG)
+ grub_unregister_command (cmd);
+#endif
+ grub_video_bitmap_reader_unregister (&jpeg_reader);
+ grub_video_bitmap_reader_unregister (&jpg_reader);
+}
diff --git a/grub-core/video/readers/png.c b/grub-core/video/readers/png.c
new file mode 100644
index 0000000..0157ff7
--- /dev/null
+++ b/grub-core/video/readers/png.c
@@ -0,0 +1,1166 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2008,2009 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/bufio.h>
+#include <grub/safemath.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+/* Uncomment following define to enable PNG debug. */
+//#define PNG_DEBUG
+
+enum
+ {
+ PNG_COLOR_TYPE_GRAY = 0,
+ PNG_COLOR_MASK_PALETTE = 1,
+ PNG_COLOR_MASK_COLOR = 2,
+ PNG_COLOR_MASK_ALPHA = 4,
+ PNG_COLOR_TYPE_PALETTE = (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE),
+ };
+
+#define PNG_COMPRESSION_BASE 0
+
+#define PNG_INTERLACE_NONE 0
+#define PNG_INTERLACE_ADAM7 1
+
+#define PNG_FILTER_TYPE_BASE 0
+
+#define PNG_FILTER_VALUE_NONE 0
+#define PNG_FILTER_VALUE_SUB 1
+#define PNG_FILTER_VALUE_UP 2
+#define PNG_FILTER_VALUE_AVG 3
+#define PNG_FILTER_VALUE_PAETH 4
+#define PNG_FILTER_VALUE_LAST 5
+
+enum
+ {
+ PNG_CHUNK_IHDR = 0x49484452,
+ PNG_CHUNK_IDAT = 0x49444154,
+ PNG_CHUNK_IEND = 0x49454e44,
+ PNG_CHUNK_PLTE = 0x504c5445
+ };
+
+#define Z_DEFLATED 8
+#define Z_FLAG_DICT 32
+
+#define INFLATE_STORED 0
+#define INFLATE_FIXED 1
+#define INFLATE_DYNAMIC 2
+
+#define WSIZE 0x8000
+
+#define DEFLATE_HCLEN_BASE 4
+#define DEFLATE_HCLEN_MAX 19
+#define DEFLATE_HLIT_BASE 257
+#define DEFLATE_HLIT_MAX 288
+#define DEFLATE_HDIST_BASE 1
+#define DEFLATE_HDIST_MAX 30
+
+#define DEFLATE_HUFF_LEN 16
+
+#ifdef PNG_DEBUG
+static grub_command_t cmd;
+#endif
+
+struct huff_table
+{
+ int *values, *maxval, *offset;
+ int num_values, max_length;
+};
+
+struct grub_png_data
+{
+ grub_file_t file;
+ struct grub_video_bitmap **bitmap;
+
+ int bit_count, bit_save;
+
+ grub_uint32_t next_offset;
+
+ unsigned image_width, image_height;
+ int bpp, is_16bit;
+ int raw_bytes, is_gray, is_alpha, is_palette;
+ int row_bytes, color_bits;
+ grub_uint8_t *image_data;
+
+ int inside_idat, idat_remain;
+
+ int code_values[DEFLATE_HLIT_MAX];
+ int code_maxval[DEFLATE_HUFF_LEN];
+ int code_offset[DEFLATE_HUFF_LEN];
+
+ int dist_values[DEFLATE_HDIST_MAX];
+ int dist_maxval[DEFLATE_HUFF_LEN];
+ int dist_offset[DEFLATE_HUFF_LEN];
+
+ grub_uint8_t palette[256][3];
+
+ struct huff_table code_table;
+ struct huff_table dist_table;
+
+ grub_uint8_t slide[WSIZE];
+ int wp;
+
+ grub_uint8_t *cur_rgb;
+
+ int cur_column, cur_filter, first_line;
+};
+
+static grub_uint32_t
+grub_png_get_dword (struct grub_png_data *data)
+{
+ grub_uint32_t r;
+
+ r = 0;
+ grub_file_read (data->file, &r, sizeof (grub_uint32_t));
+
+ return grub_be_to_cpu32 (r);
+}
+
+static grub_uint8_t
+grub_png_get_byte (struct grub_png_data *data)
+{
+ grub_uint8_t r;
+
+ if ((data->inside_idat) && (data->idat_remain == 0))
+ {
+ grub_uint32_t len, type;
+
+ do
+ {
+ /* Skip crc checksum. */
+ grub_png_get_dword (data);
+
+ if (data->file->offset != data->next_offset)
+ {
+ grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: chunk size error");
+ return 0;
+ }
+
+ len = grub_png_get_dword (data);
+ type = grub_png_get_dword (data);
+ if (type != PNG_CHUNK_IDAT)
+ {
+ grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: unexpected end of data");
+ return 0;
+ }
+
+ data->next_offset = data->file->offset + len + 4;
+ }
+ while (len == 0);
+ data->idat_remain = len;
+ }
+
+ r = 0;
+ grub_file_read (data->file, &r, 1);
+
+ if (data->inside_idat)
+ data->idat_remain--;
+
+ return r;
+}
+
+static int
+grub_png_get_bits (struct grub_png_data *data, int num)
+{
+ int code, shift;
+
+ if (data->bit_count == 0)
+ {
+ data->bit_save = grub_png_get_byte (data);
+ data->bit_count = 8;
+ }
+
+ code = 0;
+ shift = 0;
+ while (grub_errno == 0)
+ {
+ int n;
+
+ n = data->bit_count;
+ if (n > num)
+ n = num;
+
+ code += (int) (data->bit_save & ((1 << n) - 1)) << shift;
+ num -= n;
+ if (!num)
+ {
+ data->bit_count -= n;
+ data->bit_save >>= n;
+ break;
+ }
+
+ shift += n;
+
+ data->bit_save = grub_png_get_byte (data);
+ data->bit_count = 8;
+ }
+
+ return code;
+}
+
+static grub_err_t
+grub_png_decode_image_palette (struct grub_png_data *data,
+ unsigned len)
+{
+ unsigned i = 0, j;
+
+ if (len == 0)
+ return GRUB_ERR_NONE;
+
+ for (i = 0; 3 * i < len && i < 256; i++)
+ for (j = 0; j < 3; j++)
+ data->palette[i][j] = grub_png_get_byte (data);
+ for (i *= 3; i < len; i++)
+ grub_png_get_byte (data);
+
+ grub_png_get_dword (data);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_png_decode_image_header (struct grub_png_data *data)
+{
+ int color_type;
+ int color_bits;
+ enum grub_video_blit_format blt;
+
+ data->image_width = grub_png_get_dword (data);
+ data->image_height = grub_png_get_dword (data);
+
+ if ((!data->image_height) || (!data->image_width))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "png: invalid image size");
+
+ color_bits = grub_png_get_byte (data);
+ data->is_16bit = (color_bits == 16);
+
+ color_type = grub_png_get_byte (data);
+
+ /* According to PNG spec, no other types are valid. */
+ if ((color_type & ~(PNG_COLOR_MASK_ALPHA | PNG_COLOR_MASK_COLOR))
+ && (color_type != PNG_COLOR_TYPE_PALETTE))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: color type not supported");
+ if (color_type == PNG_COLOR_TYPE_PALETTE)
+ data->is_palette = 1;
+ if (data->is_16bit && data->is_palette)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: color type not supported");
+ if (color_type & PNG_COLOR_MASK_ALPHA)
+ blt = GRUB_VIDEO_BLIT_FORMAT_RGBA_8888;
+ else
+ blt = GRUB_VIDEO_BLIT_FORMAT_RGB_888;
+ if (data->is_palette)
+ data->bpp = 1;
+ else if (color_type & PNG_COLOR_MASK_COLOR)
+ data->bpp = 3;
+ else
+ {
+ data->is_gray = 1;
+ data->bpp = 1;
+ }
+
+ if ((color_bits != 8) && (color_bits != 16)
+ && (color_bits != 4
+ || !(data->is_gray || data->is_palette)))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: bit depth must be 8 or 16");
+
+ if (color_type & PNG_COLOR_MASK_ALPHA)
+ data->bpp++;
+
+ if (grub_video_bitmap_create (data->bitmap, data->image_width,
+ data->image_height,
+ blt))
+ return grub_errno;
+
+ if (data->is_16bit)
+ data->bpp <<= 1;
+
+ data->color_bits = color_bits;
+
+ if (grub_mul (data->image_width, data->bpp, &data->row_bytes))
+ return grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
+
+ if (data->color_bits <= 4)
+ {
+ if (grub_mul (data->image_width, data->color_bits + 7, &data->row_bytes))
+ return grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
+
+ data->row_bytes >>= 3;
+ }
+
+#ifndef GRUB_CPU_WORDS_BIGENDIAN
+ if (data->is_16bit || data->is_gray || data->is_palette)
+#endif
+ {
+ data->image_data = grub_calloc (data->image_height, data->row_bytes);
+ if (grub_errno)
+ return grub_errno;
+
+ data->cur_rgb = data->image_data;
+ }
+#ifndef GRUB_CPU_WORDS_BIGENDIAN
+ else
+ {
+ data->image_data = 0;
+ data->cur_rgb = (*data->bitmap)->data;
+ }
+#endif
+
+ data->raw_bytes = data->image_height * (data->row_bytes + 1);
+
+ data->cur_column = 0;
+ data->first_line = 1;
+
+ if (grub_png_get_byte (data) != PNG_COMPRESSION_BASE)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: compression method not supported");
+
+ if (grub_png_get_byte (data) != PNG_FILTER_TYPE_BASE)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: filter method not supported");
+
+ if (grub_png_get_byte (data) != PNG_INTERLACE_NONE)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: interlace method not supported");
+
+ /* Skip crc checksum. */
+ grub_png_get_dword (data);
+
+ return grub_errno;
+}
+
+/* Order of the bit length code lengths. */
+static const grub_uint8_t bitorder[] = {
+ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
+};
+
+/* Copy lengths for literal codes 257..285. */
+static const int cplens[] = {
+ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+ 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
+};
+
+/* Extra bits for literal codes 257..285. */
+static const grub_uint8_t cplext[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
+ 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 99, 99
+}; /* 99==invalid */
+
+/* Copy offsets for distance codes 0..29. */
+static const int cpdist[] = {
+ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+ 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+ 8193, 12289, 16385, 24577
+};
+
+/* Extra bits for distance codes. */
+static const grub_uint8_t cpdext[] = {
+ 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
+ 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
+ 12, 12, 13, 13
+};
+
+static void
+grub_png_init_huff_table (struct huff_table *ht, int cur_maxlen,
+ int *cur_values, int *cur_maxval, int *cur_offset)
+{
+ ht->values = cur_values;
+ ht->maxval = cur_maxval;
+ ht->offset = cur_offset;
+ ht->num_values = 0;
+ ht->max_length = cur_maxlen;
+ grub_memset (cur_maxval, 0, sizeof (int) * cur_maxlen);
+}
+
+static void
+grub_png_insert_huff_item (struct huff_table *ht, int code, int len)
+{
+ int i, n;
+
+ if (len == 0)
+ return;
+
+ if (len > ht->max_length)
+ {
+ grub_error (GRUB_ERR_BAD_FILE_TYPE, "png: invalid code length");
+ return;
+ }
+
+ n = 0;
+ for (i = len; i < ht->max_length; i++)
+ n += ht->maxval[i];
+
+ for (i = 0; i < n; i++)
+ ht->values[ht->num_values - i] = ht->values[ht->num_values - i - 1];
+
+ ht->values[ht->num_values - n] = code;
+ ht->num_values++;
+ ht->maxval[len - 1]++;
+}
+
+static void
+grub_png_build_huff_table (struct huff_table *ht)
+{
+ int base, ofs, i;
+
+ base = 0;
+ ofs = 0;
+ for (i = 0; i < ht->max_length; i++)
+ {
+ base += ht->maxval[i];
+ ofs += ht->maxval[i];
+
+ ht->maxval[i] = base;
+ ht->offset[i] = ofs - base;
+
+ base <<= 1;
+ }
+}
+
+static int
+grub_png_get_huff_code (struct grub_png_data *data, struct huff_table *ht)
+{
+ int code, i;
+
+ code = 0;
+ for (i = 0; i < ht->max_length; i++)
+ {
+ code = (code << 1) + grub_png_get_bits (data, 1);
+ if (code < ht->maxval[i])
+ return ht->values[code + ht->offset[i]];
+ }
+ return 0;
+}
+
+static grub_err_t
+grub_png_init_fixed_block (struct grub_png_data *data)
+{
+ int i;
+
+ grub_png_init_huff_table (&data->code_table, DEFLATE_HUFF_LEN,
+ data->code_values, data->code_maxval,
+ data->code_offset);
+
+ for (i = 0; i < 144; i++)
+ grub_png_insert_huff_item (&data->code_table, i, 8);
+
+ for (; i < 256; i++)
+ grub_png_insert_huff_item (&data->code_table, i, 9);
+
+ for (; i < 280; i++)
+ grub_png_insert_huff_item (&data->code_table, i, 7);
+
+ for (; i < DEFLATE_HLIT_MAX; i++)
+ grub_png_insert_huff_item (&data->code_table, i, 8);
+
+ grub_png_build_huff_table (&data->code_table);
+
+ grub_png_init_huff_table (&data->dist_table, DEFLATE_HUFF_LEN,
+ data->dist_values, data->dist_maxval,
+ data->dist_offset);
+
+ for (i = 0; i < DEFLATE_HDIST_MAX; i++)
+ grub_png_insert_huff_item (&data->dist_table, i, 5);
+
+ grub_png_build_huff_table (&data->dist_table);
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_png_init_dynamic_block (struct grub_png_data *data)
+{
+ int nl, nd, nb, i, prev;
+ struct huff_table cl;
+ int cl_values[sizeof (bitorder)];
+ int cl_maxval[8];
+ int cl_offset[8];
+ grub_uint8_t lens[DEFLATE_HCLEN_MAX];
+
+ nl = DEFLATE_HLIT_BASE + grub_png_get_bits (data, 5);
+ nd = DEFLATE_HDIST_BASE + grub_png_get_bits (data, 5);
+ nb = DEFLATE_HCLEN_BASE + grub_png_get_bits (data, 4);
+
+ if ((nl > DEFLATE_HLIT_MAX) || (nd > DEFLATE_HDIST_MAX) ||
+ (nb > DEFLATE_HCLEN_MAX))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "png: too much data");
+
+ grub_png_init_huff_table (&cl, 8, cl_values, cl_maxval, cl_offset);
+
+ for (i = 0; i < nb; i++)
+ lens[bitorder[i]] = grub_png_get_bits (data, 3);
+
+ for (; i < DEFLATE_HCLEN_MAX; i++)
+ lens[bitorder[i]] = 0;
+
+ for (i = 0; i < DEFLATE_HCLEN_MAX; i++)
+ grub_png_insert_huff_item (&cl, i, lens[i]);
+
+ grub_png_build_huff_table (&cl);
+
+ grub_png_init_huff_table (&data->code_table, DEFLATE_HUFF_LEN,
+ data->code_values, data->code_maxval,
+ data->code_offset);
+
+ grub_png_init_huff_table (&data->dist_table, DEFLATE_HUFF_LEN,
+ data->dist_values, data->dist_maxval,
+ data->dist_offset);
+
+ prev = 0;
+ for (i = 0; i < nl + nd; i++)
+ {
+ int n, code;
+ struct huff_table *ht;
+
+ if (grub_errno)
+ return grub_errno;
+
+ if (i < nl)
+ {
+ ht = &data->code_table;
+ code = i;
+ }
+ else
+ {
+ ht = &data->dist_table;
+ code = i - nl;
+ }
+
+ n = grub_png_get_huff_code (data, &cl);
+ if (n < 16)
+ {
+ grub_png_insert_huff_item (ht, code, n);
+ prev = n;
+ }
+ else if (n == 16)
+ {
+ int c;
+
+ c = 3 + grub_png_get_bits (data, 2);
+ while (c > 0)
+ {
+ grub_png_insert_huff_item (ht, code++, prev);
+ i++;
+ c--;
+ }
+ i--;
+ }
+ else if (n == 17)
+ i += 3 + grub_png_get_bits (data, 3) - 1;
+ else
+ i += 11 + grub_png_get_bits (data, 7) - 1;
+ }
+
+ grub_png_build_huff_table (&data->code_table);
+ grub_png_build_huff_table (&data->dist_table);
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_png_output_byte (struct grub_png_data *data, grub_uint8_t n)
+{
+ if (--data->raw_bytes < 0)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "image size overflown");
+
+ if (data->cur_column == 0)
+ {
+ if (n >= PNG_FILTER_VALUE_LAST)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "invalid filter value");
+
+ data->cur_filter = n;
+ }
+ else
+ *data->cur_rgb++ = n;
+
+ data->cur_column++;
+ if (data->cur_column == data->row_bytes + 1)
+ {
+ grub_uint8_t *blank_line = NULL;
+ grub_uint8_t *cur = data->cur_rgb - data->row_bytes;
+ grub_uint8_t *left = cur;
+ grub_uint8_t *up;
+
+ if (data->first_line)
+ {
+ blank_line = grub_zalloc (data->row_bytes);
+ if (blank_line == NULL)
+ return grub_errno;
+
+ up = blank_line;
+ }
+ else
+ up = cur - data->row_bytes;
+
+ switch (data->cur_filter)
+ {
+ case PNG_FILTER_VALUE_SUB:
+ {
+ int i;
+
+ cur += data->bpp;
+ for (i = data->bpp; i < data->row_bytes; i++, cur++, left++)
+ *cur += *left;
+
+ break;
+ }
+ case PNG_FILTER_VALUE_UP:
+ {
+ int i;
+
+ for (i = 0; i < data->row_bytes; i++, cur++, up++)
+ *cur += *up;
+
+ break;
+ }
+ case PNG_FILTER_VALUE_AVG:
+ {
+ int i;
+
+ for (i = 0; i < data->bpp; i++, cur++, up++)
+ *cur += *up >> 1;
+
+ for (; i < data->row_bytes; i++, cur++, up++, left++)
+ *cur += ((int) *up + (int) *left) >> 1;
+
+ break;
+ }
+ case PNG_FILTER_VALUE_PAETH:
+ {
+ int i;
+ grub_uint8_t *upper_left = up;
+
+ for (i = 0; i < data->bpp; i++, cur++, up++)
+ *cur += *up;
+
+ for (; i < data->row_bytes; i++, cur++, up++, left++, upper_left++)
+ {
+ int a, b, c, pa, pb, pc;
+
+ a = *left;
+ b = *up;
+ c = *upper_left;
+
+ pa = b - c;
+ pb = a - c;
+ pc = pa + pb;
+
+ if (pa < 0)
+ pa = -pa;
+
+ if (pb < 0)
+ pb = -pb;
+
+ if (pc < 0)
+ pc = -pc;
+
+ *cur += ((pa <= pb) && (pa <= pc)) ? a : (pb <= pc) ? b : c;
+ }
+ }
+ }
+
+ grub_free (blank_line);
+
+ data->cur_column = 0;
+ data->first_line = 0;
+ }
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_png_read_dynamic_block (struct grub_png_data *data)
+{
+ while (grub_errno == 0)
+ {
+ int n;
+
+ n = grub_png_get_huff_code (data, &data->code_table);
+ if (n < 256)
+ {
+ data->slide[data->wp] = n;
+ grub_png_output_byte (data, n);
+
+ data->wp++;
+ if (data->wp >= WSIZE)
+ data->wp = 0;
+ }
+ else if (n == 256)
+ break;
+ else
+ {
+ int len, dist, pos;
+
+ n -= 257;
+ len = cplens[n];
+ if (cplext[n])
+ len += grub_png_get_bits (data, cplext[n]);
+
+ n = grub_png_get_huff_code (data, &data->dist_table);
+ dist = cpdist[n];
+ if (cpdext[n])
+ dist += grub_png_get_bits (data, cpdext[n]);
+
+ pos = data->wp - dist;
+ if (pos < 0)
+ pos += WSIZE;
+
+ while (len > 0)
+ {
+ data->slide[data->wp] = data->slide[pos];
+ grub_png_output_byte (data, data->slide[data->wp]);
+
+ data->wp++;
+ if (data->wp >= WSIZE)
+ data->wp = 0;
+
+ pos++;
+ if (pos >= WSIZE)
+ pos = 0;
+
+ len--;
+ }
+ }
+ }
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_png_decode_image_data (struct grub_png_data *data)
+{
+ grub_uint8_t cmf, flg;
+ int final;
+
+ cmf = grub_png_get_byte (data);
+ flg = grub_png_get_byte (data);
+
+ if ((cmf & 0xF) != Z_DEFLATED)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: only support deflate compression method");
+
+ if (flg & Z_FLAG_DICT)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: dictionary not supported");
+
+ do
+ {
+ int block_type;
+
+ final = grub_png_get_bits (data, 1);
+ block_type = grub_png_get_bits (data, 2);
+
+ switch (block_type)
+ {
+ case INFLATE_STORED:
+ {
+ grub_uint16_t i, len;
+
+ data->bit_count = 0;
+ len = grub_png_get_byte (data);
+ len += ((grub_uint16_t) grub_png_get_byte (data)) << 8;
+
+ /* Skip NLEN field. */
+ grub_png_get_byte (data);
+ grub_png_get_byte (data);
+
+ for (i = 0; i < len; i++)
+ grub_png_output_byte (data, grub_png_get_byte (data));
+
+ break;
+ }
+
+ case INFLATE_FIXED:
+ grub_png_init_fixed_block (data);
+ grub_png_read_dynamic_block (data);
+ break;
+
+ case INFLATE_DYNAMIC:
+ grub_png_init_dynamic_block (data);
+ grub_png_read_dynamic_block (data);
+ break;
+
+ default:
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: unknown block type");
+ }
+ }
+ while ((!final) && (grub_errno == 0));
+
+ /* Skip adler checksum. */
+ grub_png_get_dword (data);
+
+ /* Skip crc checksum. */
+ grub_png_get_dword (data);
+
+ return grub_errno;
+}
+
+static const grub_uint8_t png_magic[8] =
+ { 0x89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0x0a };
+
+static void
+grub_png_convert_image (struct grub_png_data *data)
+{
+ unsigned i;
+ grub_uint8_t *d1, *d2;
+
+ d1 = (*data->bitmap)->data;
+ d2 = data->image_data + data->is_16bit;
+
+#ifndef GRUB_CPU_WORDS_BIGENDIAN
+#define R4 3
+#define G4 2
+#define B4 1
+#define A4 0
+#define R3 2
+#define G3 1
+#define B3 0
+#else
+#define R4 0
+#define G4 1
+#define B4 2
+#define A4 3
+#define R3 0
+#define G3 1
+#define B3 2
+#endif
+
+ if (data->color_bits <= 4)
+ {
+ grub_uint8_t palette[16][3];
+ grub_uint8_t *d1c, *d2c;
+ int shift;
+ int mask = (1 << data->color_bits) - 1;
+ unsigned j;
+ if (data->is_gray)
+ {
+ /* Generic formula is
+ (0xff * i) / ((1U << data->color_bits) - 1)
+ but for allowed bit depth of 1, 2 and for it's
+ equivalent to
+ (0xff / ((1U << data->color_bits) - 1)) * i
+ Precompute the multipliers to avoid division.
+ */
+
+ const grub_uint8_t multipliers[5] = { 0xff, 0xff, 0x55, 0x24, 0x11 };
+ for (i = 0; i < (1U << data->color_bits); i++)
+ {
+ grub_uint8_t col = multipliers[data->color_bits] * i;
+ palette[i][0] = col;
+ palette[i][1] = col;
+ palette[i][2] = col;
+ }
+ }
+ else
+ grub_memcpy (palette, data->palette, 3 << data->color_bits);
+ d1c = d1;
+ d2c = d2;
+ for (j = 0; j < data->image_height; j++, d1c += data->image_width * 3,
+ d2c += data->row_bytes)
+ {
+ d1 = d1c;
+ d2 = d2c;
+ shift = 8 - data->color_bits;
+ for (i = 0; i < data->image_width; i++, d1 += 3)
+ {
+ grub_uint8_t col = (d2[0] >> shift) & mask;
+ d1[R3] = data->palette[col][2];
+ d1[G3] = data->palette[col][1];
+ d1[B3] = data->palette[col][0];
+ shift -= data->color_bits;
+ if (shift < 0)
+ {
+ d2++;
+ shift += 8;
+ }
+ }
+ }
+ return;
+ }
+
+ if (data->is_palette)
+ {
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 3, d2++)
+ {
+ d1[R3] = data->palette[d2[0]][2];
+ d1[G3] = data->palette[d2[0]][1];
+ d1[B3] = data->palette[d2[0]][0];
+ }
+ return;
+ }
+
+ if (data->is_gray)
+ {
+ switch (data->bpp)
+ {
+ case 4:
+ /* 16-bit gray with alpha. */
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 4, d2 += 4)
+ {
+ d1[R4] = d2[3];
+ d1[G4] = d2[3];
+ d1[B4] = d2[3];
+ d1[A4] = d2[1];
+ }
+ break;
+ case 2:
+ if (data->is_16bit)
+ /* 16-bit gray without alpha. */
+ {
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 4, d2 += 2)
+ {
+ d1[R3] = d2[1];
+ d1[G3] = d2[1];
+ d1[B3] = d2[1];
+ }
+ }
+ else
+ /* 8-bit gray with alpha. */
+ {
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 4, d2 += 2)
+ {
+ d1[R4] = d2[1];
+ d1[G4] = d2[1];
+ d1[B4] = d2[1];
+ d1[A4] = d2[0];
+ }
+ }
+ break;
+ /* 8-bit gray without alpha. */
+ case 1:
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 3, d2++)
+ {
+ d1[R3] = d2[0];
+ d1[G3] = d2[0];
+ d1[B3] = d2[0];
+ }
+ break;
+ }
+ return;
+ }
+
+ {
+ /* Only copy the upper 8 bit. */
+#ifndef GRUB_CPU_WORDS_BIGENDIAN
+ for (i = 0; i < (data->image_width * data->image_height * data->bpp >> 1);
+ i++, d1++, d2 += 2)
+ *d1 = *d2;
+#else
+ switch (data->bpp)
+ {
+ /* 16-bit with alpha. */
+ case 8:
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 4, d2+=8)
+ {
+ d1[0] = d2[7];
+ d1[1] = d2[5];
+ d1[2] = d2[3];
+ d1[3] = d2[1];
+ }
+ break;
+ /* 16-bit without alpha. */
+ case 6:
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 3, d2+=6)
+ {
+ d1[0] = d2[5];
+ d1[1] = d2[3];
+ d1[2] = d2[1];
+ }
+ break;
+ case 4:
+ /* 8-bit with alpha. */
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 4, d2 += 4)
+ {
+ d1[0] = d2[3];
+ d1[1] = d2[2];
+ d1[2] = d2[1];
+ d1[3] = d2[0];
+ }
+ break;
+ /* 8-bit without alpha. */
+ case 3:
+ for (i = 0; i < (data->image_width * data->image_height);
+ i++, d1 += 3, d2 += 3)
+ {
+ d1[0] = d2[2];
+ d1[1] = d2[1];
+ d1[2] = d2[0];
+ }
+ break;
+ }
+#endif
+ }
+
+}
+
+static grub_err_t
+grub_png_decode_png (struct grub_png_data *data)
+{
+ grub_uint8_t magic[8];
+
+ if (grub_file_read (data->file, &magic[0], 8) != 8)
+ return grub_errno;
+
+ if (grub_memcmp (magic, png_magic, sizeof (png_magic)))
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "png: not a png file");
+
+ while (1)
+ {
+ grub_uint32_t len, type;
+
+ len = grub_png_get_dword (data);
+ type = grub_png_get_dword (data);
+ data->next_offset = data->file->offset + len + 4;
+
+ switch (type)
+ {
+ case PNG_CHUNK_IHDR:
+ grub_png_decode_image_header (data);
+ break;
+
+ case PNG_CHUNK_PLTE:
+ grub_png_decode_image_palette (data, len);
+ break;
+
+ case PNG_CHUNK_IDAT:
+ data->inside_idat = 1;
+ data->idat_remain = len;
+ data->bit_count = 0;
+
+ grub_png_decode_image_data (data);
+
+ data->inside_idat = 0;
+ break;
+
+ case PNG_CHUNK_IEND:
+ if (data->image_data)
+ grub_png_convert_image (data);
+
+ return grub_errno;
+
+ default:
+ grub_file_seek (data->file, data->file->offset + len + 4);
+ }
+
+ if (grub_errno)
+ break;
+
+ if (data->file->offset != data->next_offset)
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "png: chunk size error");
+ }
+
+ return grub_errno;
+}
+
+static grub_err_t
+grub_video_reader_png (struct grub_video_bitmap **bitmap,
+ const char *filename)
+{
+ grub_file_t file;
+ struct grub_png_data *data;
+
+ file = grub_buffile_open (filename, GRUB_FILE_TYPE_PIXMAP, 0);
+ if (!file)
+ return grub_errno;
+
+ data = grub_zalloc (sizeof (*data));
+ if (data != NULL)
+ {
+ data->file = file;
+ data->bitmap = bitmap;
+
+ grub_png_decode_png (data);
+
+ grub_free (data->image_data);
+ grub_free (data);
+ }
+
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_video_bitmap_destroy (*bitmap);
+ *bitmap = 0;
+ }
+
+ grub_file_close (file);
+ return grub_errno;
+}
+
+#if defined(PNG_DEBUG)
+static grub_err_t
+grub_cmd_pngtest (grub_command_t cmd_d __attribute__ ((unused)),
+ int argc, char **args)
+{
+ struct grub_video_bitmap *bitmap = 0;
+
+ if (argc != 1)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+
+ grub_video_reader_png (&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 png_reader = {
+ .extension = ".png",
+ .reader = grub_video_reader_png,
+ .next = 0
+};
+
+GRUB_MOD_INIT (png)
+{
+ grub_video_bitmap_reader_register (&png_reader);
+#if defined(PNG_DEBUG)
+ cmd = grub_register_command ("pngtest", grub_cmd_pngtest,
+ "FILE",
+ "Tests loading of PNG bitmap.");
+#endif
+}
+
+GRUB_MOD_FINI (png)
+{
+#if defined(PNG_DEBUG)
+ grub_unregister_command (cmd);
+#endif
+ grub_video_bitmap_reader_unregister (&png_reader);
+}
diff --git a/grub-core/video/readers/tga.c b/grub-core/video/readers/tga.c
new file mode 100644
index 0000000..7cb9d1d
--- /dev/null
+++ b/grub-core/video/readers/tga.c
@@ -0,0 +1,511 @@
+/*
+ * 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/bufio.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+/* Uncomment following define to enable TGA debug. */
+//#define TGA_DEBUG
+
+#define dump_int_field(x) grub_dprintf ("tga", #x " = %d (0x%04x)\n", x, x);
+#if defined(TGA_DEBUG)
+static grub_command_t cmd;
+#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;
+} GRUB_PACKED;
+
+struct tga_data
+{
+ struct grub_tga_header hdr;
+ int uses_rle;
+ int pktlen;
+ 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;
+ unsigned image_height;
+};
+
+static grub_err_t
+fetch_pixel (struct tga_data *data)
+{
+ if (!data->uses_rle)
+ {
+ if (grub_file_read (data->file, &data->pixel[0], data->bpp)
+ != data->bpp)
+ return grub_errno;
+ return GRUB_ERR_NONE;
+ }
+ if (!data->pktlen)
+ {
+ grub_uint8_t type;
+ if (grub_file_read (data->file, &type, sizeof (type)) != sizeof(type))
+ return grub_errno;
+ data->is_rle = !!(type & 0x80);
+ data->pktlen = (type & 0x7f) + 1;
+ if (data->is_rle && grub_file_read (data->file, &data->pixel[0], data->bpp)
+ != data->bpp)
+ return grub_errno;
+ }
+ if (!data->is_rle && grub_file_read (data->file, &data->pixel[0], data->bpp)
+ != data->bpp)
+ return grub_errno;
+ data->pktlen--;
+ 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)
+{
+ 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->pixel[0];
+ ptr[1] = data->pixel[0];
+ ptr[2] = data->pixel[0];
+
+ ptr += 3;
+ }
+ }
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+tga_load_truecolor_R8G8B8 (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;
+
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+ ptr[0] = data->pixel[0];
+ ptr[1] = data->pixel[1];
+ ptr[2] = data->pixel[2];
+#else
+ ptr[0] = data->pixel[2];
+ ptr[1] = data->pixel[1];
+ ptr[2] = data->pixel[0];
+#endif
+ ptr += 3;
+ }
+ }
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+tga_load_truecolor_R8G8B8A8 (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;
+
+#ifdef GRUB_CPU_WORDS_BIGENDIAN
+ ptr[0] = data->pixel[0];
+ ptr[1] = data->pixel[1];
+ ptr[2] = data->pixel[2];
+ ptr[3] = data->pixel[3];
+#else
+ ptr[0] = data->pixel[2];
+ ptr[1] = data->pixel[1];
+ ptr[2] = data->pixel[0];
+ ptr[3] = data->pixel[3];
+#endif
+
+ ptr += 4;
+ }
+ }
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_video_reader_tga (struct grub_video_bitmap **bitmap,
+ const char *filename)
+{
+ grub_ssize_t pos;
+ struct tga_data data;
+
+ grub_memset (&data, 0, sizeof (data));
+
+ data.file = grub_buffile_open (filename, GRUB_FILE_TYPE_PIXMAP, 0);
+ if (! data.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 (data.file, &data.hdr, sizeof (data.hdr))
+ != sizeof (data.hdr))
+ {
+ grub_file_close (data.file);
+ return grub_errno;
+ }
+
+ /* Skip ID field. */
+ pos = grub_file_tell (data.file);
+ pos += data.hdr.id_length;
+ grub_file_seek (data.file, pos);
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_file_close (data.file);
+ return grub_errno;
+ }
+
+ grub_dprintf("tga", "tga: header\n");
+ dump_int_field(data.hdr.id_length);
+ dump_int_field(data.hdr.color_map_type);
+ dump_int_field(data.hdr.image_type);
+ dump_int_field(data.hdr.color_map_first_index);
+ dump_int_field(data.hdr.color_map_length);
+ dump_int_field(data.hdr.color_map_bpp);
+ dump_int_field(data.hdr.image_x_origin);
+ dump_int_field(data.hdr.image_y_origin);
+ dump_int_field(data.hdr.image_width);
+ dump_int_field(data.hdr.image_height);
+ dump_int_field(data.hdr.image_bpp);
+ dump_int_field(data.hdr.image_descriptor);
+
+ data.image_width = grub_le_to_cpu16 (data.hdr.image_width);
+ data.image_height = grub_le_to_cpu16 (data.hdr.image_height);
+
+ /* Check that bitmap encoding is supported. */
+ switch (data.hdr.image_type)
+ {
+ 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;
+
+ default:
+ grub_file_close (data.file);
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "unsupported bitmap format (unknown encoding %d)", data.hdr.image_type);
+ }
+
+ data.bpp = data.hdr.image_bpp / 8;
+
+ /* Check that bitmap depth is supported. */
+ switch (data.hdr.image_type)
+ {
+ case GRUB_TGA_IMAGE_TYPE_RLE_BLACK_AND_WHITE:
+ case GRUB_TGA_IMAGE_TYPE_UNCOMPRESSED_BLACK_AND_WHITE:
+ if (data.hdr.image_bpp != 8)
+ {
+ 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_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)
+ {
+ case 24:
+ 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_truecolor_R8G8B8 (&data);
+ break;
+
+ case 32:
+ grub_video_bitmap_create (bitmap, data.image_width,
+ data.image_height,
+ GRUB_VIDEO_BLIT_FORMAT_RGBA_8888);
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_file_close (data.file);
+ return grub_errno;
+ }
+
+ data.bitmap = *bitmap;
+ /* Load bitmap data. */
+ tga_load_truecolor_R8G8B8A8 (&data);
+ break;
+
+ default:
+ grub_file_close (data.file);
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE,
+ "unsupported bitmap format (bpp=%d)",
+ data.hdr.image_bpp);
+ }
+ }
+
+ /* If there was a loading problem, destroy bitmap. */
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_video_bitmap_destroy (*bitmap);
+ *bitmap = 0;
+ }
+
+ grub_file_close (data.file);
+ return grub_errno;
+}
+
+#if defined(TGA_DEBUG)
+static grub_err_t
+grub_cmd_tgatest (grub_command_t cmd_d __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(tga)
+{
+ grub_video_bitmap_reader_register (&tga_reader);
+#if defined(TGA_DEBUG)
+ cmd = grub_register_command ("tgatest", grub_cmd_tgatest,
+ "FILE", "Tests loading of TGA bitmap.");
+#endif
+}
+
+GRUB_MOD_FINI(tga)
+{
+#if defined(TGA_DEBUG)
+ grub_unregister_command (cmd);
+#endif
+ grub_video_bitmap_reader_unregister (&tga_reader);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-06 22:15:11 +0000