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-rw-r--r--grub-core/video/readers/tga.c497
1 files changed, 497 insertions, 0 deletions
diff --git a/grub-core/video/readers/tga.c b/grub-core/video/readers/tga.c
new file mode 100644
index 0000000..84be68a
--- /dev/null
+++ b/grub-core/video/readers/tga.c
@@ -0,0 +1,497 @@
+/*
+ * 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
+
+#if defined(TGA_DEBUG)
+#define dump_int_field(x) grub_printf( #x " = %d (0x%04x)\n", x, x);
+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;
+} __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, &type, sizeof (type)) != sizeof(type))
+ return grub_errno;
+
+ if (type & 0x80)
+ {
+ /* RLE-encoded packet. */
+ type &= 0x7f;
+ type++;
+
+ if (grub_file_read (file, &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, &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, &type, sizeof (type)) != sizeof(type))
+ return grub_errno;
+
+ if (type & 0x80)
+ {
+ /* RLE-encoded packet. */
+ type &= 0x7f;
+ type++;
+
+ if (grub_file_read (file, &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, &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, &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, &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, &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_RGBA_8888);
+ 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_RGB_888);
+ 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 (grub_command_t cmd __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);
+}
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