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Reorder functions

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Abdelrahman Said 2024-05-04 23:46:24 +01:00
parent 484d30d84c
commit 3f022acf9c
1 changed files with 37 additions and 37 deletions
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74
src/tiff/tiffread.c
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@ -59,9 +59,9 @@ TiffImage read_fields(const TiffReader *reader);
Pixel *load_image_pixels(TiffReader *reader, Arena *arena);
bool read_strip_data(TiffReader *reader, Arena *arena);
void read_strips(const TiffReader *reader, Pixel *buf);
void read_strip_data_field(const TiffReader *reader, StripDataField *field);
bool read_field(const TiffField *field, TiffImage *img);
bool validate_image_type(const TiffImage *img);
void read_strip_data_field(const TiffReader *reader, StripDataField *field);
void read_from_file_with_offset(FILE *fp, void *dst, u64 count, u64 offset);
Image *read_baseline_tiff(const char *file, Arena *arena) {
@ -358,6 +358,42 @@ void read_strips(const TiffReader *reader, Pixel *buf) {
}
}
void read_strip_data_field(const TiffReader *reader, StripDataField *field) {
u16 tiff_long_byte_count = field_types[TIFF_FIELD_TYPE_LONG].byte_count;
bool value_is_file_offset = field->length_in_bytes > tiff_long_byte_count;
u32 offset = field->type_byte_count * field->strip_index;
if (!value_is_file_offset) {
u8 *value = (u8 *)&(field->value_from_file->long_val);
memcpy(field->strip_value, value + offset, field->type_byte_count);
return;
}
read_from_file_with_offset(reader->fp, field->strip_value,
field->type_byte_count,
field->value_from_file->long_val + offset);
u16 tiff_short_byte_count = field_types[TIFF_FIELD_TYPE_SHORT].byte_count;
switch (reader->header.order) {
case TIFF_ORDER_BIG_ENDIAN:
if (IS_LITTLE_ENDIAN) {
*(field->strip_value) = field->type_byte_count > tiff_short_byte_count
? ntohl(*(field->strip_value))
: ntohs(*(field->strip_value));
}
break;
case TIFF_ORDER_LITTLE_ENDIAN:
if (IS_BIG_ENDIAN) {
*(field->strip_value) = field->type_byte_count > tiff_short_byte_count
? htonl(*(field->strip_value))
: htons(*(field->strip_value));
}
break;
}
}
bool read_field(const TiffField *field, TiffImage *img) {
switch (field->tag) {
case TIFF_PUBLIC_TAG_IMAGE_WIDTH:
@ -530,42 +566,6 @@ bool validate_image_type(const TiffImage *img) {
return true;
}
void read_strip_data_field(const TiffReader *reader, StripDataField *field) {
u16 tiff_long_byte_count = field_types[TIFF_FIELD_TYPE_LONG].byte_count;
bool value_is_file_offset = field->length_in_bytes > tiff_long_byte_count;
u32 offset = field->type_byte_count * field->strip_index;
if (!value_is_file_offset) {
u8 *value = (u8 *)&(field->value_from_file->long_val);
memcpy(field->strip_value, value + offset, field->type_byte_count);
return;
}
read_from_file_with_offset(reader->fp, field->strip_value,
field->type_byte_count,
field->value_from_file->long_val + offset);
u16 tiff_short_byte_count = field_types[TIFF_FIELD_TYPE_SHORT].byte_count;
switch (reader->header.order) {
case TIFF_ORDER_BIG_ENDIAN:
if (IS_LITTLE_ENDIAN) {
*(field->strip_value) = field->type_byte_count > tiff_short_byte_count
? ntohl(*(field->strip_value))
: ntohs(*(field->strip_value));
}
break;
case TIFF_ORDER_LITTLE_ENDIAN:
if (IS_BIG_ENDIAN) {
*(field->strip_value) = field->type_byte_count > tiff_short_byte_count
? htonl(*(field->strip_value))
: htons(*(field->strip_value));
}
break;
}
}
void read_from_file_with_offset(FILE *fp, void *dst, u64 count, u64 offset) {
if (!fp || !dst) {
return;