// Copyright 2014 PDFium Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style license that can be | |
// found in the LICENSE file. | |
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
#include "fx_gif.h" | |
void CGifLZWDecoder::Input(uint8_t* src_buf, FX_DWORD src_size) { | |
next_in = src_buf; | |
avail_in = src_size; | |
} | |
FX_DWORD CGifLZWDecoder::GetAvailInput() { | |
return avail_in; | |
} | |
void CGifLZWDecoder::InitTable(uint8_t code_len) { | |
code_size = code_len; | |
code_clear = 1 << code_size; | |
code_end = code_clear + 1; | |
bits_left = 0; | |
code_store = 0; | |
next_in = NULL; | |
avail_in = 0; | |
stack_size = 0; | |
code_first = 0; | |
ClearTable(); | |
} | |
void CGifLZWDecoder::ClearTable() { | |
code_size_cur = code_size + 1; | |
code_next = code_end + 1; | |
code_old = (FX_WORD)-1; | |
FXSYS_memset(code_table, 0, sizeof(tag_Table) * GIF_MAX_LZW_CODE); | |
FXSYS_memset(stack, 0, GIF_MAX_LZW_CODE); | |
for (FX_WORD i = 0; i < code_clear; i++) { | |
code_table[i].suffix = (uint8_t)i; | |
} | |
} | |
void CGifLZWDecoder::DecodeString(FX_WORD code) { | |
stack_size = 0; | |
while (TRUE) { | |
ASSERT(code <= code_next); | |
if (code < code_clear || code > code_next) { | |
break; | |
} | |
stack[GIF_MAX_LZW_CODE - 1 - stack_size++] = code_table[code].suffix; | |
code = code_table[code].prefix; | |
} | |
stack[GIF_MAX_LZW_CODE - 1 - stack_size++] = (uint8_t)code; | |
code_first = (uint8_t)code; | |
} | |
void CGifLZWDecoder::AddCode(FX_WORD prefix_code, uint8_t append_char) { | |
if (code_next == GIF_MAX_LZW_CODE) { | |
return; | |
} | |
code_table[code_next].prefix = prefix_code; | |
code_table[code_next].suffix = append_char; | |
if (++code_next < GIF_MAX_LZW_CODE) { | |
if (code_next >> code_size_cur) { | |
code_size_cur++; | |
} | |
} | |
} | |
int32_t CGifLZWDecoder::Decode(uint8_t* des_buf, FX_DWORD& des_size) { | |
if (des_size == 0) { | |
return 3; | |
} | |
FX_DWORD i = 0; | |
if (stack_size != 0) { | |
if (des_size < stack_size) { | |
FXSYS_memcpy(des_buf, &stack[GIF_MAX_LZW_CODE - stack_size], des_size); | |
stack_size -= (FX_WORD)des_size; | |
return 3; | |
} | |
FXSYS_memcpy(des_buf, &stack[GIF_MAX_LZW_CODE - stack_size], stack_size); | |
des_buf += stack_size; | |
i += stack_size; | |
stack_size = 0; | |
} | |
FX_WORD code = 0; | |
while (i <= des_size && (avail_in > 0 || bits_left >= code_size_cur)) { | |
if (code_size_cur > 12) { | |
if (err_msg_ptr) { | |
FXSYS_strncpy(err_msg_ptr, "Code Length Out Of Range", | |
GIF_MAX_ERROR_SIZE - 1); | |
} | |
return 0; | |
} | |
if (avail_in > 0) { | |
code_store |= (*next_in++) << bits_left; | |
avail_in--; | |
bits_left += 8; | |
} | |
while (bits_left >= code_size_cur) { | |
code = (FX_WORD)code_store & ((1 << code_size_cur) - 1); | |
code_store >>= code_size_cur; | |
bits_left -= code_size_cur; | |
if (code == code_clear) { | |
ClearTable(); | |
continue; | |
} else if (code == code_end) { | |
des_size = i; | |
return 1; | |
} else { | |
if (code_old != (FX_WORD)-1) { | |
if (code_next < GIF_MAX_LZW_CODE) { | |
if (code == code_next) { | |
AddCode(code_old, code_first); | |
DecodeString(code); | |
} else if (code > code_next) { | |
if (err_msg_ptr) { | |
FXSYS_strncpy(err_msg_ptr, "Decode Error, Out Of Range", | |
GIF_MAX_ERROR_SIZE - 1); | |
} | |
return 0; | |
} else { | |
DecodeString(code); | |
uint8_t append_char = stack[GIF_MAX_LZW_CODE - stack_size]; | |
AddCode(code_old, append_char); | |
} | |
} | |
} else { | |
DecodeString(code); | |
} | |
code_old = code; | |
if (i + stack_size > des_size) { | |
FXSYS_memcpy(des_buf, &stack[GIF_MAX_LZW_CODE - stack_size], | |
des_size - i); | |
stack_size -= (FX_WORD)(des_size - i); | |
return 3; | |
} | |
FXSYS_memcpy(des_buf, &stack[GIF_MAX_LZW_CODE - stack_size], | |
stack_size); | |
des_buf += stack_size; | |
i += stack_size; | |
stack_size = 0; | |
} | |
} | |
} | |
if (avail_in == 0) { | |
des_size = i; | |
return 2; | |
} | |
return 0; | |
} | |
static FX_BOOL _gif_grow_buf(uint8_t*& dst_buf, | |
FX_DWORD& dst_len, | |
FX_DWORD size) { | |
if (dst_len < size) { | |
FX_DWORD len_org = dst_len; | |
while (dst_buf && dst_len < size) { | |
dst_len <<= 1; | |
dst_buf = FX_Realloc(uint8_t, dst_buf, dst_len); | |
} | |
if (dst_buf == NULL) { | |
dst_len = size; | |
dst_buf = FX_Realloc(uint8_t, dst_buf, dst_len); | |
if (dst_buf == NULL) { | |
return FALSE; | |
} | |
} | |
FXSYS_memset(dst_buf + len_org, 0, dst_len - len_org); | |
return dst_buf != NULL; | |
} | |
return TRUE; | |
} | |
static inline void _gif_cut_index(uint8_t& val, | |
FX_DWORD index, | |
uint8_t index_bit, | |
uint8_t index_bit_use, | |
uint8_t bit_use) { | |
FX_DWORD cut = ((1 << (index_bit - index_bit_use)) - 1) << index_bit_use; | |
val |= ((index & cut) >> index_bit_use) << bit_use; | |
} | |
static inline uint8_t _gif_cut_buf(const uint8_t* buf, | |
FX_DWORD& offset, | |
uint8_t bit_cut, | |
uint8_t& bit_offset, | |
FX_DWORD& bit_num) { | |
if (bit_cut != 8) { | |
FX_WORD index = 0; | |
index |= ((1 << bit_cut) - 1) << (7 - bit_offset); | |
uint8_t ret = ((index & buf[offset]) >> (7 - bit_offset)); | |
bit_offset += bit_cut; | |
if (bit_offset >= 8) { | |
if (bit_offset > 8) { | |
ret |= ((index & (buf[offset + 1] << 8)) >> 8); | |
} | |
bit_offset -= 8; | |
offset++; | |
} | |
bit_num += bit_cut; | |
return ret; | |
} | |
bit_num += bit_cut; | |
return buf[offset++]; | |
} | |
CGifLZWEncoder::CGifLZWEncoder() { | |
FXSYS_memset(this, 0, sizeof(CGifLZWEncoder)); | |
} | |
CGifLZWEncoder::~CGifLZWEncoder() {} | |
void CGifLZWEncoder::ClearTable() { | |
index_bit_cur = code_size + 1; | |
index_num = code_end + 1; | |
table_cur = code_end + 1; | |
for (FX_WORD i = 0; i < GIF_MAX_LZW_CODE; i++) { | |
code_table[i].prefix = 0; | |
code_table[i].suffix = 0; | |
} | |
} | |
void CGifLZWEncoder::Start(uint8_t code_len, | |
const uint8_t* src_buf, | |
uint8_t*& dst_buf, | |
FX_DWORD& offset) { | |
code_size = code_len + 1; | |
src_bit_cut = code_size; | |
if (code_len == 0) { | |
src_bit_cut = 1; | |
code_size = 2; | |
} | |
code_clear = 1 << code_size; | |
code_end = code_clear + 1; | |
dst_buf[offset++] = code_size; | |
bit_offset = 0; | |
ClearTable(); | |
src_offset = 0; | |
src_bit_offset = 0; | |
src_bit_num = 0; | |
code_table[index_num].prefix = _gif_cut_buf(src_buf, src_offset, src_bit_cut, | |
src_bit_offset, src_bit_num); | |
code_table[index_num].suffix = _gif_cut_buf(src_buf, src_offset, src_bit_cut, | |
src_bit_offset, src_bit_num); | |
} | |
void CGifLZWEncoder::WriteBlock(uint8_t*& dst_buf, | |
FX_DWORD& dst_len, | |
FX_DWORD& offset) { | |
if (!_gif_grow_buf(dst_buf, dst_len, offset + GIF_DATA_BLOCK + 1)) { | |
longjmp(jmp, 1); | |
} | |
dst_buf[offset++] = index_buf_len; | |
FXSYS_memcpy(&dst_buf[offset], index_buf, index_buf_len); | |
offset += index_buf_len; | |
FXSYS_memset(index_buf, 0, GIF_DATA_BLOCK); | |
index_buf_len = 0; | |
} | |
void CGifLZWEncoder::EncodeString(FX_DWORD index, | |
uint8_t*& dst_buf, | |
FX_DWORD& dst_len, | |
FX_DWORD& offset) { | |
uint8_t index_bit_use; | |
index_bit_use = 0; | |
if (index_buf_len == GIF_DATA_BLOCK) { | |
WriteBlock(dst_buf, dst_len, offset); | |
} | |
_gif_cut_index(index_buf[index_buf_len], index, index_bit_cur, index_bit_use, | |
bit_offset); | |
if (index_bit_cur <= (8 - bit_offset)) { | |
bit_offset += index_bit_cur; | |
} else if (index_bit_cur <= (16 - bit_offset)) { | |
index_bit_use += (8 - bit_offset); | |
bit_offset = 0; | |
index_buf_len++; | |
if (index_buf_len == GIF_DATA_BLOCK) { | |
WriteBlock(dst_buf, dst_len, offset); | |
} | |
_gif_cut_index(index_buf[index_buf_len], index, index_bit_cur, | |
index_bit_use, bit_offset); | |
bit_offset = index_bit_cur - index_bit_use; | |
} else { | |
index_bit_use += (8 - bit_offset); | |
bit_offset = 0; | |
index_buf_len++; | |
if (index_buf_len == GIF_DATA_BLOCK) { | |
WriteBlock(dst_buf, dst_len, offset); | |
} | |
_gif_cut_index(index_buf[index_buf_len], index, index_bit_cur, | |
index_bit_use, bit_offset); | |
index_bit_use += 8; | |
bit_offset = 0; | |
index_buf_len++; | |
if (index_buf_len == GIF_DATA_BLOCK) { | |
WriteBlock(dst_buf, dst_len, offset); | |
} | |
_gif_cut_index(index_buf[index_buf_len], index, index_bit_cur, | |
index_bit_use, bit_offset); | |
bit_offset = index_bit_cur - index_bit_use; | |
} | |
if (bit_offset == 8) { | |
bit_offset = 0; | |
index_buf_len++; | |
if (index_buf_len == GIF_DATA_BLOCK) { | |
WriteBlock(dst_buf, dst_len, offset); | |
} | |
} | |
if (index == code_end) { | |
index_buf_len++; | |
WriteBlock(dst_buf, dst_len, offset); | |
} | |
if (index_num++ >> index_bit_cur) { | |
index_bit_cur++; | |
} | |
} | |
FX_BOOL CGifLZWEncoder::Encode(const uint8_t* src_buf, | |
FX_DWORD src_len, | |
uint8_t*& dst_buf, | |
FX_DWORD& dst_len, | |
FX_DWORD& offset) { | |
uint8_t suffix; | |
if (setjmp(jmp)) { | |
return FALSE; | |
} | |
while (src_bit_num < src_len) { | |
if (!LookUpInTable(src_buf, src_offset, src_bit_offset)) { | |
EncodeString(code_table[index_num].prefix, dst_buf, dst_len, offset); | |
if (index_num == GIF_MAX_LZW_CODE) { | |
suffix = code_table[index_num - 1].suffix; | |
EncodeString(code_clear, dst_buf, dst_len, offset); | |
ClearTable(); | |
code_table[index_num].prefix = suffix; | |
code_table[index_num].suffix = _gif_cut_buf( | |
src_buf, src_offset, src_bit_cut, src_bit_offset, src_bit_num); | |
} else { | |
code_table[index_num].prefix = code_table[index_num - 1].suffix; | |
code_table[index_num].suffix = _gif_cut_buf( | |
src_buf, src_offset, src_bit_cut, src_bit_offset, src_bit_num); | |
} | |
} | |
} | |
src_offset = 0; | |
src_bit_offset = 0; | |
src_bit_num = 0; | |
return TRUE; | |
} | |
FX_BOOL CGifLZWEncoder::LookUpInTable(const uint8_t* buf, | |
FX_DWORD& offset, | |
uint8_t& bit_offset) { | |
for (FX_WORD i = table_cur; i < index_num; i++) { | |
if (code_table[i].prefix == code_table[index_num].prefix && | |
code_table[i].suffix == code_table[index_num].suffix) { | |
code_table[index_num].prefix = i; | |
code_table[index_num].suffix = | |
_gif_cut_buf(buf, offset, src_bit_cut, bit_offset, src_bit_num); | |
table_cur = i; | |
return TRUE; | |
} | |
} | |
table_cur = code_end + 1; | |
return FALSE; | |
} | |
void CGifLZWEncoder::Finish(uint8_t*& dst_buf, | |
FX_DWORD& dst_len, | |
FX_DWORD& offset) { | |
EncodeString(code_table[index_num].prefix, dst_buf, dst_len, offset); | |
EncodeString(code_end, dst_buf, dst_len, offset); | |
bit_offset = 0; | |
ClearTable(); | |
} | |
gif_decompress_struct_p _gif_create_decompress() { | |
gif_decompress_struct_p gif_ptr = | |
(gif_decompress_struct*)FX_Alloc(uint8_t, sizeof(gif_decompress_struct)); | |
if (gif_ptr == NULL) { | |
return NULL; | |
} | |
FXSYS_memset(gif_ptr, 0, sizeof(gif_decompress_struct)); | |
gif_ptr->decode_status = GIF_D_STATUS_SIG; | |
gif_ptr->img_ptr_arr_ptr = new CFX_ArrayTemplate<GifImage*>; | |
#ifdef GIF_SUPPORT_COMMENT_EXTENSION | |
gif_ptr->cmt_data_ptr = new CFX_ByteString; | |
#endif | |
#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
gif_ptr->pt_ptr_arr_ptr = new CFX_ArrayTemplate<GifPlainText*>; | |
#endif | |
return gif_ptr; | |
} | |
void _gif_destroy_decompress(gif_decompress_struct_pp gif_ptr_ptr) { | |
if (gif_ptr_ptr == NULL || *gif_ptr_ptr == NULL) { | |
return; | |
} | |
gif_decompress_struct_p gif_ptr = *gif_ptr_ptr; | |
*gif_ptr_ptr = NULL; | |
if (gif_ptr->global_pal_ptr != NULL) { | |
FX_Free(gif_ptr->global_pal_ptr); | |
} | |
if (gif_ptr->img_decoder_ptr != NULL) { | |
delete gif_ptr->img_decoder_ptr; | |
} | |
if (gif_ptr->img_ptr_arr_ptr != NULL) { | |
int32_t size_img_arr = gif_ptr->img_ptr_arr_ptr->GetSize(); | |
for (int32_t i = 0; i < size_img_arr; i++) { | |
GifImage* p = gif_ptr->img_ptr_arr_ptr->GetAt(i); | |
if (p->image_info_ptr != NULL) { | |
FX_Free(p->image_info_ptr); | |
} | |
if (p->image_gce_ptr != NULL) { | |
FX_Free(p->image_gce_ptr); | |
} | |
if (p->image_row_buf != NULL) { | |
FX_Free(p->image_row_buf); | |
} | |
if (p->local_pal_ptr != NULL && | |
p->local_pal_ptr != gif_ptr->global_pal_ptr) { | |
FX_Free(p->local_pal_ptr); | |
} | |
FX_Free(p); | |
} | |
gif_ptr->img_ptr_arr_ptr->RemoveAll(); | |
delete gif_ptr->img_ptr_arr_ptr; | |
} | |
#ifdef GIF_SUPPORT_APPLICATION_EXTENSION | |
if (gif_ptr->app_data != NULL) { | |
FX_Free(gif_ptr->app_data); | |
} | |
#endif | |
#ifdef GIF_SUPPORT_COMMENT_EXTENSION | |
if (gif_ptr->cmt_data_ptr != NULL) { | |
delete gif_ptr->cmt_data_ptr; | |
} | |
#endif | |
#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION | |
if (gif_ptr->gce_ptr != NULL) { | |
FX_Free(gif_ptr->gce_ptr); | |
} | |
#endif | |
#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
if (gif_ptr->pt_ptr_arr_ptr != NULL) { | |
int32_t size_pt_arr = gif_ptr->pt_ptr_arr_ptr->GetSize(); | |
for (int32_t i = 0; i < size_pt_arr; i++) { | |
GifPlainText* p = gif_ptr->pt_ptr_arr_ptr->GetAt(i); | |
if (p->gce_ptr != NULL) { | |
FX_Free(p->gce_ptr); | |
} | |
if (p->pte_ptr != NULL) { | |
FX_Free(p->pte_ptr); | |
} | |
if (p->string_ptr != NULL) { | |
delete p->string_ptr; | |
} | |
} | |
gif_ptr->pt_ptr_arr_ptr->RemoveAll(); | |
delete gif_ptr->pt_ptr_arr_ptr; | |
} | |
#endif | |
FX_Free(gif_ptr); | |
} | |
gif_compress_struct_p _gif_create_compress() { | |
gif_compress_struct_p gif_ptr = | |
(gif_compress_struct*)FX_Alloc(uint8_t, sizeof(gif_compress_struct)); | |
if (gif_ptr == NULL) { | |
return NULL; | |
} | |
FXSYS_memset(gif_ptr, 0, sizeof(gif_compress_struct)); | |
gif_ptr->img_encoder_ptr = new CGifLZWEncoder; | |
gif_ptr->header_ptr = (GifHeader*)FX_Alloc(uint8_t, sizeof(GifHeader)); | |
if (gif_ptr->header_ptr == NULL) { | |
delete (gif_ptr->img_encoder_ptr); | |
FX_Free(gif_ptr); | |
return NULL; | |
} | |
FXSYS_memcpy(gif_ptr->header_ptr->signature, GIF_SIGNATURE, 3); | |
FXSYS_memcpy(gif_ptr->header_ptr->version, "89a", 3); | |
gif_ptr->lsd_ptr = (GifLSD*)FX_Alloc(uint8_t, sizeof(GifLSD)); | |
if (gif_ptr->lsd_ptr == NULL) { | |
FX_Free(gif_ptr->header_ptr); | |
delete (gif_ptr->img_encoder_ptr); | |
FX_Free(gif_ptr); | |
return NULL; | |
} | |
FXSYS_memset(gif_ptr->lsd_ptr, 0, sizeof(GifLSD)); | |
gif_ptr->image_info_ptr = | |
(GifImageInfo*)FX_Alloc(uint8_t, sizeof(GifImageInfo)); | |
if (gif_ptr->image_info_ptr == NULL) { | |
FX_Free(gif_ptr->lsd_ptr); | |
FX_Free(gif_ptr->header_ptr); | |
delete (gif_ptr->img_encoder_ptr); | |
FX_Free(gif_ptr); | |
return NULL; | |
} | |
FXSYS_memset(gif_ptr->image_info_ptr, 0, sizeof(GifImageInfo)); | |
#ifdef GIF_SUPPORT_APPLICATION_EXTENSION | |
FXSYS_memcpy(gif_ptr->app_identify, "netscape", 8); | |
FXSYS_memcpy(gif_ptr->app_authentication, "2.0", 3); | |
#endif | |
#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION | |
gif_ptr->gce_ptr = (GifGCE*)FX_Alloc(uint8_t, sizeof(GifGCE)); | |
if (gif_ptr->gce_ptr == NULL) { | |
FX_Free(gif_ptr->image_info_ptr); | |
FX_Free(gif_ptr->lsd_ptr); | |
FX_Free(gif_ptr->header_ptr); | |
delete (gif_ptr->img_encoder_ptr); | |
FX_Free(gif_ptr); | |
return NULL; | |
} | |
#endif | |
#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
gif_ptr->pte_ptr = (GifPTE*)FX_Alloc(uint8_t, sizeof(GifPTE)); | |
if (gif_ptr->pte_ptr == NULL) { | |
FX_Free(gif_ptr->gce_ptr); | |
FX_Free(gif_ptr->image_info_ptr); | |
FX_Free(gif_ptr->lsd_ptr); | |
FX_Free(gif_ptr->header_ptr); | |
delete (gif_ptr->img_encoder_ptr); | |
FX_Free(gif_ptr); | |
return NULL; | |
} | |
FXSYS_memset(gif_ptr->pte_ptr, 0, sizeof(GifPTE)); | |
gif_ptr->pte_ptr->block_size = 12; | |
#endif | |
return gif_ptr; | |
} | |
void _gif_destroy_compress(gif_compress_struct_pp gif_ptr_ptr) { | |
if (gif_ptr_ptr == NULL || *gif_ptr_ptr == NULL) { | |
return; | |
} | |
gif_compress_struct_p gif_ptr = *gif_ptr_ptr; | |
*gif_ptr_ptr = NULL; | |
if (gif_ptr->header_ptr != NULL) { | |
FX_Free(gif_ptr->header_ptr); | |
} | |
if (gif_ptr->lsd_ptr != NULL) { | |
FX_Free(gif_ptr->lsd_ptr); | |
} | |
if (gif_ptr->global_pal != NULL) { | |
FX_Free(gif_ptr->global_pal); | |
} | |
if (gif_ptr->image_info_ptr != NULL) { | |
FX_Free(gif_ptr->image_info_ptr); | |
} | |
if (gif_ptr->local_pal != NULL) { | |
FX_Free(gif_ptr->local_pal); | |
} | |
if (gif_ptr->img_encoder_ptr != NULL) { | |
delete gif_ptr->img_encoder_ptr; | |
} | |
#ifdef GIF_SUPPORT_APPLICATION_EXTENSION | |
if (gif_ptr->app_data != NULL) { | |
FX_Free(gif_ptr->app_data); | |
} | |
#endif | |
#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION | |
if (gif_ptr->gce_ptr != NULL) { | |
FX_Free(gif_ptr->gce_ptr); | |
} | |
#endif | |
#ifdef GIF_SUPPORT_COMMENT_EXTENSION | |
if (gif_ptr->cmt_data_ptr != NULL) { | |
FX_Free(gif_ptr->cmt_data_ptr); | |
} | |
#endif | |
#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
if (gif_ptr->pte_ptr != NULL) { | |
FX_Free(gif_ptr->pte_ptr); | |
} | |
#endif | |
FX_Free(gif_ptr); | |
} | |
void _gif_error(gif_decompress_struct_p gif_ptr, const FX_CHAR* err_msg) { | |
if (gif_ptr != NULL && gif_ptr->_gif_error_fn != NULL) { | |
gif_ptr->_gif_error_fn(gif_ptr, err_msg); | |
} | |
} | |
void _gif_warn(gif_decompress_struct_p gif_ptr, const FX_CHAR* err_msg) {} | |
int32_t _gif_read_header(gif_decompress_struct_p gif_ptr) { | |
if (gif_ptr == NULL) { | |
return 0; | |
} | |
FX_DWORD skip_size_org = gif_ptr->skip_size; | |
ASSERT(sizeof(GifHeader) == 6); | |
GifHeader* gif_header_ptr = NULL; | |
if (_gif_read_data(gif_ptr, (uint8_t**)&gif_header_ptr, 6) == NULL) { | |
return 2; | |
} | |
if (FXSYS_strncmp(gif_header_ptr->signature, GIF_SIGNATURE, 3) != 0 || | |
gif_header_ptr->version[0] != '8' || gif_header_ptr->version[2] != 'a') { | |
_gif_error(gif_ptr, "Not A Gif Image"); | |
return 0; | |
} | |
ASSERT(sizeof(GifLSD) == 7); | |
GifLSD* gif_lsd_ptr = NULL; | |
if (_gif_read_data(gif_ptr, (uint8_t**)&gif_lsd_ptr, 7) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
if (((GifGF*)&gif_lsd_ptr->global_flag)->global_pal) { | |
gif_ptr->global_pal_num = 2 | |
<< ((GifGF*)&gif_lsd_ptr->global_flag)->pal_bits; | |
ASSERT(sizeof(GifPalette) == 3); | |
int32_t global_pal_size = gif_ptr->global_pal_num * 3; | |
uint8_t* global_pal_ptr = NULL; | |
if (_gif_read_data(gif_ptr, &global_pal_ptr, global_pal_size) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
gif_ptr->global_sort_flag = ((GifGF*)&gif_lsd_ptr->global_flag)->sort_flag; | |
gif_ptr->global_color_resolution = | |
((GifGF*)&gif_lsd_ptr->global_flag)->color_resolution; | |
if (gif_ptr->global_pal_ptr != NULL) { | |
FX_Free(gif_ptr->global_pal_ptr); | |
} | |
gif_ptr->global_pal_ptr = NULL; | |
gif_ptr->global_pal_ptr = (GifPalette*)FX_Alloc(uint8_t, global_pal_size); | |
GIF_PTR_NOT_NULL(gif_ptr->global_pal_ptr, gif_ptr); | |
FXSYS_memcpy(gif_ptr->global_pal_ptr, global_pal_ptr, global_pal_size); | |
} | |
gif_ptr->width = (int)_GetWord_LSBFirst((uint8_t*)&gif_lsd_ptr->width); | |
gif_ptr->height = (int)_GetWord_LSBFirst((uint8_t*)&gif_lsd_ptr->height); | |
gif_ptr->bc_index = gif_lsd_ptr->bc_index; | |
gif_ptr->pixel_aspect = gif_lsd_ptr->pixel_aspect; | |
return 1; | |
} | |
int32_t _gif_get_frame(gif_decompress_struct_p gif_ptr) { | |
if (gif_ptr == NULL) { | |
return 0; | |
} | |
int32_t ret = 1; | |
while (TRUE) { | |
switch (gif_ptr->decode_status) { | |
case GIF_D_STATUS_TAIL: | |
return 1; | |
case GIF_D_STATUS_SIG: { | |
uint8_t* sig_ptr = NULL; | |
if (_gif_read_data(gif_ptr, &sig_ptr, 1) == NULL) { | |
return 2; | |
} | |
switch (*sig_ptr) { | |
case GIF_SIG_EXTENSION: | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT); | |
continue; | |
case GIF_SIG_IMAGE: | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_INFO); | |
continue; | |
case GIF_SIG_TRAILER: | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); | |
return 1; | |
default: | |
if (gif_ptr->avail_in) { | |
_gif_warn(gif_ptr, "The Gif File has non_standard Tag!"); | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_SIG); | |
continue; | |
} | |
_gif_warn(gif_ptr, "The Gif File Doesn't have Trailer Tag!"); | |
return 1; | |
} | |
} | |
case GIF_D_STATUS_EXT: { | |
uint8_t* ext_ptr = NULL; | |
if (_gif_read_data(gif_ptr, &ext_ptr, 1) == NULL) { | |
return 2; | |
} | |
switch (*ext_ptr) { | |
#ifdef GIF_SUPPORT_APPLICATION_EXTENSION | |
case GIF_BLOCK_AE: | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_AE); | |
continue; | |
#endif | |
#ifdef GIF_SUPPORT_COMMENT_EXTENSION | |
case GIF_BLOCK_CE: | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_CE); | |
continue; | |
#endif | |
#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION | |
case GIF_BLOCK_GCE: | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_GCE); | |
continue; | |
#endif | |
#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
case GIF_BLOCK_PTE: | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_PTE); | |
continue; | |
#endif | |
default: { | |
int32_t status = GIF_D_STATUS_EXT_UNE; | |
#ifndef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
if (*ext_ptr == GIF_BLOCK_PTE) { | |
status = GIF_D_STATUS_EXT_PTE; | |
} | |
#endif | |
_gif_save_decoding_status(gif_ptr, status); | |
continue; | |
} | |
} | |
} | |
case GIF_D_STATUS_IMG_INFO: { | |
ret = _gif_decode_image_info(gif_ptr); | |
if (ret != 1) { | |
return ret; | |
} | |
continue; | |
} | |
case GIF_D_STATUS_IMG_DATA: { | |
uint8_t* data_size_ptr = NULL; | |
uint8_t* data_ptr = NULL; | |
FX_DWORD skip_size_org = gif_ptr->skip_size; | |
if (_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
return 2; | |
} | |
while (*data_size_ptr != GIF_BLOCK_TERMINAL) { | |
if (_gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); | |
skip_size_org = gif_ptr->skip_size; | |
if (_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
return 2; | |
} | |
} | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_SIG); | |
continue; | |
} | |
default: { | |
ret = _gif_decode_extension(gif_ptr); | |
if (ret != 1) { | |
return ret; | |
} | |
continue; | |
} | |
} | |
} | |
return 1; | |
} | |
void _gif_takeover_gce_ptr(gif_decompress_struct_p gif_ptr, | |
GifGCE** gce_ptr_ptr) { | |
*gce_ptr_ptr = NULL; | |
#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION | |
if (gif_ptr->gce_ptr != NULL && gce_ptr_ptr != NULL) { | |
*gce_ptr_ptr = gif_ptr->gce_ptr; | |
gif_ptr->gce_ptr = NULL; | |
} | |
#endif | |
} | |
int32_t _gif_decode_extension(gif_decompress_struct_p gif_ptr) { | |
uint8_t* data_size_ptr = NULL; | |
uint8_t* data_ptr = NULL; | |
FX_DWORD skip_size_org = gif_ptr->skip_size; | |
switch (gif_ptr->decode_status) { | |
#ifdef GIF_SUPPORT_APPLICATION_EXTENSION | |
case GIF_D_STATUS_EXT_AE: { | |
ASSERT(sizeof(GifAE) == 12); | |
GifAE* gif_ae_ptr = NULL; | |
if (_gif_read_data(gif_ptr, (uint8_t**)&gif_ae_ptr, 12) == NULL) { | |
return 2; | |
} | |
CFX_ByteString gif_ae_data_str; | |
if (_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
while (*data_size_ptr != GIF_BLOCK_TERMINAL) { | |
uint8_t data_size = *data_size_ptr; | |
if (_gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) == NULL || | |
_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
gif_ae_data_str += CFX_ByteString((const uint8_t*)data_ptr, data_size); | |
} | |
FXSYS_memcpy(gif_ptr->app_identify, gif_ae_ptr->app_identify, 8); | |
FXSYS_memcpy(gif_ptr->app_authentication, gif_ae_ptr->app_authentication, | |
3); | |
gif_ptr->app_data_size = gif_ae_data_str.GetLength(); | |
if (gif_ptr->app_data != NULL) { | |
FX_Free(gif_ptr->app_data); | |
gif_ptr->app_data = NULL; | |
} | |
gif_ptr->app_data = FX_Alloc(uint8_t, gif_ptr->app_data_size); | |
GIF_PTR_NOT_NULL(gif_ptr->app_data, gif_ptr); | |
FXSYS_memcpy(gif_ptr->app_data, const uint8_t*(gif_ae_data_str), | |
gif_ptr->app_data_size); | |
} break; | |
#endif | |
#ifdef GIF_SUPPORT_COMMENT_EXTENSION | |
case GIF_D_STATUS_EXT_CE: { | |
if (_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
gif_ptr->cmt_data_ptr->Empty(); | |
while (*data_size_ptr != GIF_BLOCK_TERMINAL) { | |
uint8_t data_size = *data_size_ptr; | |
if (_gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) == NULL || | |
_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
*(gif_ptr->cmt_data_ptr) += | |
CFX_ByteString((const FX_CHAR*)data_ptr, data_size); | |
} | |
} break; | |
#endif | |
#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
case GIF_D_STATUS_EXT_PTE: { | |
ASSERT(sizeof(GifPTE) == 13); | |
GifPTE* gif_pte_ptr = NULL; | |
if (_gif_read_data(gif_ptr, (uint8_t**)&gif_pte_ptr, 13) == NULL) { | |
return 2; | |
} | |
GifPlainText* gif_pt_ptr = FX_Alloc(GifPlainText, 1); | |
GIF_PTR_NOT_NULL(gif_pt_ptr, gif_ptr); | |
FXSYS_memset(gif_pt_ptr, 0, sizeof(GifPlainText)); | |
_gif_takeover_gce_ptr(gif_ptr, &gif_pt_ptr->gce_ptr); | |
gif_pt_ptr->pte_ptr = (GifPTE*)FX_Alloc(uint8_t, sizeof(GifPTE)); | |
GIF_PTR_NOT_NULL(gif_pt_ptr->pte_ptr, gif_ptr); | |
gif_pt_ptr->string_ptr = new CFX_ByteString; | |
GIF_PTR_NOT_NULL(gif_pt_ptr->string_ptr, gif_ptr); | |
gif_pt_ptr->pte_ptr->block_size = gif_pte_ptr->block_size; | |
gif_pt_ptr->pte_ptr->grid_left = | |
_GetWord_LSBFirst((uint8_t*)&gif_pte_ptr->grid_left); | |
gif_pt_ptr->pte_ptr->grid_top = | |
_GetWord_LSBFirst((uint8_t*)&gif_pte_ptr->grid_top); | |
gif_pt_ptr->pte_ptr->grid_width = | |
_GetWord_LSBFirst((uint8_t*)&gif_pte_ptr->grid_width); | |
gif_pt_ptr->pte_ptr->grid_height = | |
_GetWord_LSBFirst((uint8_t*)&gif_pte_ptr->grid_height); | |
gif_pt_ptr->pte_ptr->char_width = gif_pte_ptr->char_width; | |
gif_pt_ptr->pte_ptr->char_height = gif_pte_ptr->char_height; | |
gif_pt_ptr->pte_ptr->fc_index = gif_pte_ptr->fc_index; | |
gif_pt_ptr->pte_ptr->bc_index = gif_pte_ptr->bc_index; | |
if (_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
if (gif_pt_ptr != NULL) { | |
if (gif_pt_ptr->gce_ptr != NULL) { | |
FX_Free(gif_pt_ptr->gce_ptr); | |
} | |
if (gif_pt_ptr->pte_ptr != NULL) { | |
FX_Free(gif_pt_ptr->pte_ptr); | |
} | |
if (gif_pt_ptr->string_ptr != NULL) { | |
delete gif_pt_ptr->string_ptr; | |
} | |
FX_Free(gif_pt_ptr); | |
} | |
return 2; | |
} | |
while (*data_size_ptr != GIF_BLOCK_TERMINAL) { | |
uint8_t data_size = *data_size_ptr; | |
if (_gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) == NULL || | |
_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
if (gif_pt_ptr != NULL) { | |
if (gif_pt_ptr->gce_ptr != NULL) { | |
FX_Free(gif_pt_ptr->gce_ptr); | |
} | |
if (gif_pt_ptr->pte_ptr != NULL) { | |
FX_Free(gif_pt_ptr->pte_ptr); | |
} | |
if (gif_pt_ptr->string_ptr != NULL) { | |
delete gif_pt_ptr->string_ptr; | |
} | |
FX_Free(gif_pt_ptr); | |
} | |
return 2; | |
} | |
*(gif_pt_ptr->string_ptr) += | |
CFX_ByteString((const FX_CHAR*)data_ptr, data_size); | |
} | |
gif_ptr->pt_ptr_arr_ptr->Add(gif_pt_ptr); | |
} break; | |
#endif | |
#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION | |
case GIF_D_STATUS_EXT_GCE: { | |
ASSERT(sizeof(GifGCE) == 5); | |
GifGCE* gif_gce_ptr = NULL; | |
if (_gif_read_data(gif_ptr, (uint8_t**)&gif_gce_ptr, 6) == NULL) { | |
return 2; | |
} | |
if (gif_ptr->gce_ptr == NULL) { | |
gif_ptr->gce_ptr = (GifGCE*)FX_Alloc(uint8_t, sizeof(GifGCE)); | |
GIF_PTR_NOT_NULL(gif_ptr->gce_ptr, gif_ptr); | |
} | |
gif_ptr->gce_ptr->block_size = gif_gce_ptr->block_size; | |
gif_ptr->gce_ptr->gce_flag = gif_gce_ptr->gce_flag; | |
gif_ptr->gce_ptr->delay_time = | |
_GetWord_LSBFirst((uint8_t*)&gif_gce_ptr->delay_time); | |
gif_ptr->gce_ptr->trans_index = gif_gce_ptr->trans_index; | |
} break; | |
#endif | |
default: { | |
#ifndef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
if (gif_ptr->decode_status == GIF_D_STATUS_EXT_PTE) { | |
#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION | |
if (gif_ptr->gce_ptr != NULL) { | |
FX_Free(gif_ptr->gce_ptr); | |
gif_ptr->gce_ptr = NULL; | |
} | |
#endif | |
} | |
#endif | |
if (_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
return 2; | |
} | |
while (*data_size_ptr != GIF_BLOCK_TERMINAL) { | |
if (_gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) == NULL || | |
_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
} | |
} | |
} | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_SIG); | |
return 1; | |
} | |
int32_t _gif_decode_image_info(gif_decompress_struct_p gif_ptr) { | |
if (gif_ptr->width == 0 || gif_ptr->height == 0) { | |
_gif_error(gif_ptr, "No Image Header Info"); | |
return 0; | |
} | |
FX_DWORD skip_size_org = gif_ptr->skip_size; | |
ASSERT(sizeof(GifImageInfo) == 9); | |
GifImageInfo* gif_img_info_ptr = NULL; | |
if (_gif_read_data(gif_ptr, (uint8_t**)&gif_img_info_ptr, 9) == NULL) { | |
return 2; | |
} | |
GifImage* gif_image_ptr = (GifImage*)FX_Alloc(uint8_t, sizeof(GifImage)); | |
GIF_PTR_NOT_NULL(gif_image_ptr, gif_ptr); | |
FXSYS_memset(gif_image_ptr, 0, sizeof(GifImage)); | |
gif_image_ptr->image_info_ptr = | |
(GifImageInfo*)FX_Alloc(uint8_t, sizeof(GifImageInfo)); | |
GIF_PTR_NOT_NULL(gif_image_ptr->image_info_ptr, gif_ptr); | |
gif_image_ptr->image_info_ptr->left = | |
_GetWord_LSBFirst((uint8_t*)&gif_img_info_ptr->left); | |
gif_image_ptr->image_info_ptr->top = | |
_GetWord_LSBFirst((uint8_t*)&gif_img_info_ptr->top); | |
gif_image_ptr->image_info_ptr->width = | |
_GetWord_LSBFirst((uint8_t*)&gif_img_info_ptr->width); | |
gif_image_ptr->image_info_ptr->height = | |
_GetWord_LSBFirst((uint8_t*)&gif_img_info_ptr->height); | |
gif_image_ptr->image_info_ptr->local_flag = gif_img_info_ptr->local_flag; | |
if (gif_image_ptr->image_info_ptr->left + | |
gif_image_ptr->image_info_ptr->width > | |
gif_ptr->width || | |
gif_image_ptr->image_info_ptr->top + | |
gif_image_ptr->image_info_ptr->height > | |
gif_ptr->height) { | |
if (gif_image_ptr->image_info_ptr != NULL) { | |
FX_Free(gif_image_ptr->image_info_ptr); | |
} | |
if (gif_image_ptr->image_row_buf != NULL) { | |
FX_Free(gif_image_ptr->image_row_buf); | |
} | |
FX_Free(gif_image_ptr); | |
_gif_error(gif_ptr, "Image Data Out Of LSD, The File May Be Corrupt"); | |
return 0; | |
} | |
GifLF* gif_img_info_lf_ptr = (GifLF*)&gif_img_info_ptr->local_flag; | |
if (gif_img_info_lf_ptr->local_pal) { | |
ASSERT(sizeof(GifPalette) == 3); | |
int32_t loc_pal_size = (2 << gif_img_info_lf_ptr->pal_bits) * 3; | |
uint8_t* loc_pal_ptr = NULL; | |
if (_gif_read_data(gif_ptr, &loc_pal_ptr, loc_pal_size) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
if (gif_image_ptr->image_info_ptr != NULL) { | |
FX_Free(gif_image_ptr->image_info_ptr); | |
} | |
if (gif_image_ptr->image_row_buf != NULL) { | |
FX_Free(gif_image_ptr->image_row_buf); | |
} | |
FX_Free(gif_image_ptr); | |
return 2; | |
} | |
gif_image_ptr->local_pal_ptr = | |
(GifPalette*)gif_ptr->_gif_ask_buf_for_pal_fn(gif_ptr, loc_pal_size); | |
if (gif_image_ptr->local_pal_ptr != NULL) { | |
FXSYS_memcpy((uint8_t*)gif_image_ptr->local_pal_ptr, loc_pal_ptr, | |
loc_pal_size); | |
} | |
} | |
uint8_t* code_size_ptr = NULL; | |
if (_gif_read_data(gif_ptr, &code_size_ptr, 1) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
if (gif_image_ptr->image_info_ptr != NULL) { | |
FX_Free(gif_image_ptr->image_info_ptr); | |
} | |
if (gif_image_ptr->local_pal_ptr != NULL) { | |
FX_Free(gif_image_ptr->local_pal_ptr); | |
} | |
if (gif_image_ptr->image_row_buf != NULL) { | |
FX_Free(gif_image_ptr->image_row_buf); | |
} | |
FX_Free(gif_image_ptr); | |
return 2; | |
} | |
gif_image_ptr->image_code_size = *code_size_ptr; | |
gif_ptr->_gif_record_current_position_fn(gif_ptr, | |
&gif_image_ptr->image_data_pos); | |
gif_image_ptr->image_data_pos += gif_ptr->skip_size; | |
_gif_takeover_gce_ptr(gif_ptr, &gif_image_ptr->image_gce_ptr); | |
gif_ptr->img_ptr_arr_ptr->Add(gif_image_ptr); | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); | |
return 1; | |
} | |
int32_t _gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { | |
if (gif_ptr == NULL || frame_num < 0 || | |
frame_num >= gif_ptr->img_ptr_arr_ptr->GetSize()) { | |
return 0; | |
} | |
uint8_t* data_size_ptr = NULL; | |
uint8_t* data_ptr = NULL; | |
FX_DWORD skip_size_org = gif_ptr->skip_size; | |
GifImage* gif_image_ptr = gif_ptr->img_ptr_arr_ptr->GetAt(frame_num); | |
FX_DWORD gif_img_row_bytes = gif_image_ptr->image_info_ptr->width; | |
if (gif_ptr->decode_status == GIF_D_STATUS_TAIL) { | |
if (gif_image_ptr->image_row_buf) { | |
FX_Free(gif_image_ptr->image_row_buf); | |
gif_image_ptr->image_row_buf = NULL; | |
} | |
gif_image_ptr->image_row_buf = FX_Alloc(uint8_t, gif_img_row_bytes); | |
GIF_PTR_NOT_NULL(gif_image_ptr->image_row_buf, gif_ptr); | |
GifGCE* gif_img_gce_ptr = gif_image_ptr->image_gce_ptr; | |
int32_t loc_pal_num = | |
((GifLF*)&gif_image_ptr->image_info_ptr->local_flag)->local_pal | |
? (2 << ((GifLF*)&gif_image_ptr->image_info_ptr->local_flag) | |
->pal_bits) | |
: 0; | |
gif_ptr->avail_in = 0; | |
if (gif_img_gce_ptr == NULL) { | |
FX_BOOL bRes = gif_ptr->_gif_get_record_position_fn( | |
gif_ptr, gif_image_ptr->image_data_pos, | |
gif_image_ptr->image_info_ptr->left, | |
gif_image_ptr->image_info_ptr->top, | |
gif_image_ptr->image_info_ptr->width, | |
gif_image_ptr->image_info_ptr->height, loc_pal_num, | |
gif_image_ptr->local_pal_ptr, 0, 0, -1, 0, | |
(FX_BOOL)((GifLF*)&gif_image_ptr->image_info_ptr->local_flag) | |
->interlace); | |
if (!bRes) { | |
FX_Free(gif_image_ptr->image_row_buf); | |
gif_image_ptr->image_row_buf = NULL; | |
_gif_error(gif_ptr, "Error Read Record Position Data"); | |
return 0; | |
} | |
} else { | |
FX_BOOL bRes = gif_ptr->_gif_get_record_position_fn( | |
gif_ptr, gif_image_ptr->image_data_pos, | |
gif_image_ptr->image_info_ptr->left, | |
gif_image_ptr->image_info_ptr->top, | |
gif_image_ptr->image_info_ptr->width, | |
gif_image_ptr->image_info_ptr->height, loc_pal_num, | |
gif_image_ptr->local_pal_ptr, | |
(int32_t)gif_image_ptr->image_gce_ptr->delay_time, | |
(FX_BOOL)((GifCEF*)&gif_image_ptr->image_gce_ptr->gce_flag) | |
->user_input, | |
((GifCEF*)&gif_image_ptr->image_gce_ptr->gce_flag)->transparency | |
? (int32_t)gif_image_ptr->image_gce_ptr->trans_index | |
: -1, | |
(int32_t)((GifCEF*)&gif_image_ptr->image_gce_ptr->gce_flag) | |
->disposal_method, | |
(FX_BOOL)((GifLF*)&gif_image_ptr->image_info_ptr->local_flag) | |
->interlace); | |
if (!bRes) { | |
FX_Free(gif_image_ptr->image_row_buf); | |
gif_image_ptr->image_row_buf = NULL; | |
_gif_error(gif_ptr, "Error Read Record Position Data"); | |
return 0; | |
} | |
} | |
if (gif_ptr->img_decoder_ptr == NULL) { | |
gif_ptr->img_decoder_ptr = new CGifLZWDecoder(gif_ptr->err_ptr); | |
GIF_PTR_NOT_NULL(gif_ptr->img_decoder_ptr, gif_ptr); | |
} | |
gif_ptr->img_decoder_ptr->InitTable(gif_image_ptr->image_code_size); | |
gif_ptr->img_row_offset = 0; | |
gif_ptr->img_row_avail_size = 0; | |
gif_ptr->img_pass_num = 0; | |
gif_image_ptr->image_row_num = 0; | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); | |
} | |
CGifLZWDecoder* img_decoder_ptr = gif_ptr->img_decoder_ptr; | |
if (gif_ptr->decode_status == GIF_D_STATUS_IMG_DATA) { | |
if (_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
return 2; | |
} | |
if (*data_size_ptr != GIF_BLOCK_TERMINAL) { | |
if (_gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
img_decoder_ptr->Input(data_ptr, *data_size_ptr); | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); | |
gif_ptr->img_row_offset += gif_ptr->img_row_avail_size; | |
gif_ptr->img_row_avail_size = gif_img_row_bytes - gif_ptr->img_row_offset; | |
int32_t ret = img_decoder_ptr->Decode( | |
gif_image_ptr->image_row_buf + gif_ptr->img_row_offset, | |
gif_ptr->img_row_avail_size); | |
if (ret == 0) { | |
FX_Free(gif_image_ptr->image_row_buf); | |
gif_image_ptr->image_row_buf = NULL; | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); | |
_gif_error(gif_ptr, "Decode Image Data Error"); | |
return 0; | |
} | |
while (ret != 0) { | |
if (ret == 1) { | |
gif_ptr->_gif_get_row_fn(gif_ptr, gif_image_ptr->image_row_num, | |
gif_image_ptr->image_row_buf); | |
FX_Free(gif_image_ptr->image_row_buf); | |
gif_image_ptr->image_row_buf = NULL; | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); | |
return 1; | |
} | |
if (ret == 2) { | |
ASSERT(img_decoder_ptr->GetAvailInput() == 0); | |
skip_size_org = gif_ptr->skip_size; | |
if (_gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { | |
return 2; | |
} | |
if (*data_size_ptr != GIF_BLOCK_TERMINAL) { | |
if (_gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) == NULL) { | |
gif_ptr->skip_size = skip_size_org; | |
return 2; | |
} | |
img_decoder_ptr->Input(data_ptr, *data_size_ptr); | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); | |
gif_ptr->img_row_offset += gif_ptr->img_row_avail_size; | |
gif_ptr->img_row_avail_size = | |
gif_img_row_bytes - gif_ptr->img_row_offset; | |
ret = img_decoder_ptr->Decode( | |
gif_image_ptr->image_row_buf + gif_ptr->img_row_offset, | |
gif_ptr->img_row_avail_size); | |
} | |
} | |
if (ret == 3) { | |
if (((GifLF*)&gif_image_ptr->image_info_ptr->local_flag)->interlace) { | |
gif_ptr->_gif_get_row_fn(gif_ptr, gif_image_ptr->image_row_num, | |
gif_image_ptr->image_row_buf); | |
gif_image_ptr->image_row_num += | |
s_gif_interlace_step[gif_ptr->img_pass_num]; | |
if (gif_image_ptr->image_row_num >= | |
(int32_t)gif_image_ptr->image_info_ptr->height) { | |
gif_ptr->img_pass_num++; | |
gif_image_ptr->image_row_num = | |
s_gif_interlace_step[gif_ptr->img_pass_num] / 2; | |
} | |
} else { | |
gif_ptr->_gif_get_row_fn(gif_ptr, gif_image_ptr->image_row_num++, | |
gif_image_ptr->image_row_buf); | |
} | |
gif_ptr->img_row_offset = 0; | |
gif_ptr->img_row_avail_size = gif_img_row_bytes; | |
ret = img_decoder_ptr->Decode( | |
gif_image_ptr->image_row_buf + gif_ptr->img_row_offset, | |
gif_ptr->img_row_avail_size); | |
} | |
if (ret == 0) { | |
FX_Free(gif_image_ptr->image_row_buf); | |
gif_image_ptr->image_row_buf = NULL; | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); | |
_gif_error(gif_ptr, "Decode Image Data Error"); | |
return 0; | |
} | |
} | |
} | |
_gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); | |
} | |
_gif_error(gif_ptr, "Decode Image Data Error"); | |
return 0; | |
} | |
void _gif_save_decoding_status(gif_decompress_struct_p gif_ptr, | |
int32_t status) { | |
gif_ptr->decode_status = status; | |
gif_ptr->next_in += gif_ptr->skip_size; | |
gif_ptr->avail_in -= gif_ptr->skip_size; | |
gif_ptr->skip_size = 0; | |
} | |
uint8_t* _gif_read_data(gif_decompress_struct_p gif_ptr, | |
uint8_t** des_buf_pp, | |
FX_DWORD data_size) { | |
if (gif_ptr == NULL || gif_ptr->avail_in < gif_ptr->skip_size + data_size) { | |
return NULL; | |
} | |
*des_buf_pp = gif_ptr->next_in + gif_ptr->skip_size; | |
gif_ptr->skip_size += data_size; | |
return *des_buf_pp; | |
} | |
void _gif_input_buffer(gif_decompress_struct_p gif_ptr, | |
uint8_t* src_buf, | |
FX_DWORD src_size) { | |
gif_ptr->next_in = src_buf; | |
gif_ptr->avail_in = src_size; | |
gif_ptr->skip_size = 0; | |
} | |
FX_DWORD _gif_get_avail_input(gif_decompress_struct_p gif_ptr, | |
uint8_t** avial_buf_ptr) { | |
if (avial_buf_ptr != NULL) { | |
*avial_buf_ptr = NULL; | |
if (gif_ptr->avail_in > 0) { | |
*avial_buf_ptr = gif_ptr->next_in; | |
} | |
} | |
return gif_ptr->avail_in; | |
} | |
int32_t _gif_get_frame_num(gif_decompress_struct_p gif_ptr) { | |
return gif_ptr->img_ptr_arr_ptr->GetSize(); | |
} | |
static FX_BOOL _gif_write_header(gif_compress_struct_p gif_ptr, | |
uint8_t*& dst_buf, | |
FX_DWORD& dst_len) { | |
if (gif_ptr->cur_offset) { | |
return TRUE; | |
} | |
dst_len = sizeof(GifHeader) + sizeof(GifLSD) + sizeof(GifGF); | |
dst_buf = FX_TryAlloc(uint8_t, dst_len); | |
if (dst_buf == NULL) { | |
return FALSE; | |
} | |
FXSYS_memset(dst_buf, 0, dst_len); | |
FXSYS_memcpy(dst_buf, gif_ptr->header_ptr, sizeof(GifHeader)); | |
gif_ptr->cur_offset += sizeof(GifHeader); | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, gif_ptr->lsd_ptr->width); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, gif_ptr->lsd_ptr->height); | |
gif_ptr->cur_offset += 2; | |
dst_buf[gif_ptr->cur_offset++] = gif_ptr->lsd_ptr->global_flag; | |
dst_buf[gif_ptr->cur_offset++] = gif_ptr->lsd_ptr->bc_index; | |
dst_buf[gif_ptr->cur_offset++] = gif_ptr->lsd_ptr->pixel_aspect; | |
if (gif_ptr->global_pal) { | |
FX_WORD size = sizeof(GifPalette) * gif_ptr->gpal_num; | |
if (!_gif_grow_buf(dst_buf, dst_len, gif_ptr->cur_offset + size)) { | |
return FALSE; | |
} | |
FXSYS_memcpy(&dst_buf[gif_ptr->cur_offset], gif_ptr->global_pal, size); | |
gif_ptr->cur_offset += size; | |
} | |
return TRUE; | |
} | |
void interlace_buf(const uint8_t* buf, FX_DWORD pitch, FX_DWORD height) { | |
CFX_ArrayTemplate<uint8_t*> pass[4]; | |
int i, j; | |
FX_DWORD row; | |
row = 0; | |
uint8_t* temp; | |
while (row < height) { | |
if (row % 8 == 0) { | |
j = 0; | |
} else if (row % 4 == 0) { | |
j = 1; | |
} else if (row % 2 == 0) { | |
j = 2; | |
} else { | |
j = 3; | |
} | |
temp = FX_Alloc(uint8_t, pitch); | |
if (temp == NULL) { | |
return; | |
} | |
FXSYS_memcpy(temp, &buf[pitch * row], pitch); | |
pass[j].Add(temp); | |
row++; | |
} | |
for (i = 0, row = 0; i < 4; i++) { | |
for (j = 0; j < pass[i].GetSize(); j++, row++) { | |
FXSYS_memcpy((uint8_t*)&buf[pitch * row], pass[i].GetAt(j), pitch); | |
FX_Free(pass[i].GetAt(j)); | |
} | |
} | |
} | |
static void _gif_write_block_data(const uint8_t* src_buf, | |
FX_DWORD src_len, | |
uint8_t*& dst_buf, | |
FX_DWORD& dst_len, | |
FX_DWORD& dst_offset) { | |
FX_DWORD src_offset = 0; | |
while (src_len > GIF_DATA_BLOCK) { | |
dst_buf[dst_offset++] = GIF_DATA_BLOCK; | |
FXSYS_memcpy(&dst_buf[dst_offset], &src_buf[src_offset], GIF_DATA_BLOCK); | |
dst_offset += GIF_DATA_BLOCK; | |
src_offset += GIF_DATA_BLOCK; | |
src_len -= GIF_DATA_BLOCK; | |
} | |
dst_buf[dst_offset++] = (uint8_t)src_len; | |
FXSYS_memcpy(&dst_buf[dst_offset], &src_buf[src_offset], src_len); | |
dst_offset += src_len; | |
} | |
static FX_BOOL _gif_write_data(gif_compress_struct_p gif_ptr, | |
uint8_t*& dst_buf, | |
FX_DWORD& dst_len) { | |
if (!_gif_grow_buf(dst_buf, dst_len, gif_ptr->cur_offset + GIF_DATA_BLOCK)) { | |
return FALSE; | |
} | |
#ifdef GIF_SUPPORT_GRAPHIC_CONTROL_EXTENSION | |
if (FXSYS_memcmp(gif_ptr->header_ptr->version, "89a", 3) == 0) { | |
dst_buf[gif_ptr->cur_offset++] = GIF_SIG_EXTENSION; | |
dst_buf[gif_ptr->cur_offset++] = GIF_BLOCK_GCE; | |
gif_ptr->gce_ptr->block_size = 4; | |
dst_buf[gif_ptr->cur_offset++] = gif_ptr->gce_ptr->block_size; | |
gif_ptr->gce_ptr->gce_flag = 0; | |
dst_buf[gif_ptr->cur_offset++] = gif_ptr->gce_ptr->gce_flag; | |
gif_ptr->gce_ptr->delay_time = 10; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->gce_ptr->delay_time); | |
gif_ptr->cur_offset += 2; | |
gif_ptr->gce_ptr->trans_index = 0; | |
dst_buf[gif_ptr->cur_offset++] = gif_ptr->gce_ptr->trans_index; | |
dst_buf[gif_ptr->cur_offset++] = 0; | |
} | |
#endif | |
dst_buf[gif_ptr->cur_offset++] = GIF_SIG_IMAGE; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->image_info_ptr->left); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->image_info_ptr->top); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->image_info_ptr->width); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->image_info_ptr->height); | |
gif_ptr->cur_offset += 2; | |
GifLF& lf = (GifLF&)gif_ptr->image_info_ptr->local_flag; | |
dst_buf[gif_ptr->cur_offset++] = gif_ptr->image_info_ptr->local_flag; | |
if (gif_ptr->local_pal) { | |
FX_DWORD pal_size = sizeof(GifPalette) * gif_ptr->lpal_num; | |
if (!_gif_grow_buf(dst_buf, dst_len, pal_size + gif_ptr->cur_offset)) { | |
return FALSE; | |
} | |
FXSYS_memcpy(&dst_buf[gif_ptr->cur_offset], gif_ptr->local_pal, pal_size); | |
gif_ptr->cur_offset += pal_size; | |
} | |
if (lf.interlace) { | |
interlace_buf(gif_ptr->src_buf, gif_ptr->src_pitch, | |
gif_ptr->image_info_ptr->height); | |
} | |
uint8_t code_bit = lf.pal_bits; | |
if (lf.local_pal == 0) { | |
GifGF& gf = (GifGF&)gif_ptr->lsd_ptr->global_flag; | |
code_bit = gf.pal_bits; | |
} | |
gif_ptr->img_encoder_ptr->Start(code_bit, gif_ptr->src_buf, dst_buf, | |
gif_ptr->cur_offset); | |
FX_DWORD i; | |
for (i = 0; i < gif_ptr->src_row; i++) { | |
if (!gif_ptr->img_encoder_ptr->Encode( | |
&gif_ptr->src_buf[i * gif_ptr->src_pitch], | |
gif_ptr->src_width * (code_bit + 1), dst_buf, dst_len, | |
gif_ptr->cur_offset)) { | |
return FALSE; | |
} | |
} | |
gif_ptr->img_encoder_ptr->Finish(dst_buf, dst_len, gif_ptr->cur_offset); | |
dst_buf[gif_ptr->cur_offset++] = 0; | |
#ifdef GIF_SUPPORT_COMMENT_EXTENSION | |
if (FXSYS_memcmp(gif_ptr->header_ptr->version, "89a", 3) == 0 && | |
gif_ptr->cmt_data_ptr) { | |
dst_buf[gif_ptr->cur_offset++] = GIF_SIG_EXTENSION; | |
dst_buf[gif_ptr->cur_offset++] = GIF_BLOCK_CE; | |
_gif_write_block_data(gif_ptr->cmt_data_ptr, gif_ptr->cmt_data_len, dst_buf, | |
dst_len, gif_ptr->cur_offset); | |
dst_buf[gif_ptr->cur_offset++] = 0; | |
} | |
#endif | |
#ifdef GIF_SUPPORT_PLAIN_TEXT_EXTENSION | |
if (FXSYS_memcmp(gif_ptr->header_ptr->version, "89a", 3) == 0 && | |
gif_ptr->pte_data_ptr) { | |
dst_buf[gif_ptr->cur_offset++] = GIF_SIG_EXTENSION; | |
dst_buf[gif_ptr->cur_offset++] = GIF_BLOCK_PTE; | |
dst_buf[gif_ptr->cur_offset++] = gif_ptr->pte_ptr->block_size; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->pte_ptr->grid_left); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->pte_ptr->grid_top); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->pte_ptr->grid_width); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->pte_ptr->grid_height); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->pte_ptr->char_width); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->pte_ptr->char_height); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->pte_ptr->fc_index); | |
gif_ptr->cur_offset += 2; | |
_SetWord_LSBFirst(dst_buf + gif_ptr->cur_offset, | |
gif_ptr->pte_ptr->bc_index); | |
gif_ptr->cur_offset += 2; | |
_gif_write_block_data(gif_ptr->pte_data_ptr, gif_ptr->pte_data_len, dst_buf, | |
dst_len, gif_ptr->cur_offset); | |
gif_ptr->cur_offset += gif_ptr->pte_data_len; | |
dst_buf[gif_ptr->cur_offset++] = 0; | |
} | |
#endif | |
#ifdef GIF_SUPPORT_APPLICATION_EXTENSION | |
if (FXSYS_memcmp(gif_ptr->header_ptr->version, "89a", 3) == 0 && | |
gif_ptr->app_data) { | |
dst_buf[gif_ptr->cur_offset++] = GIF_SIG_EXTENSION; | |
dst_buf[gif_ptr->cur_offset++] = GIF_BLOCK_AE; | |
dst_buf[gif_ptr->cur_offset++] = 11; | |
FXSYS_memcpy(&dst_buf[gif_ptr->cur_offset], gif_ptr->app_identify, 8); | |
gif_ptr->cur_offset += 8; | |
FXSYS_memcpy(&dst_buf[gif_ptr->cur_offset], gif_ptr->app_authentication, 8); | |
gif_ptr->cur_offset += 3; | |
FXSYS_memcpy(&dst_buf[gif_ptr->cur_offset], gif_ptr->app_data, | |
gif_ptr->app_data_size); | |
gif_ptr->cur_offset += gif_ptr->app_data_size; | |
dst_buf[gif_ptr->cur_offset++] = 0; | |
} | |
#endif | |
dst_buf[gif_ptr->cur_offset++] = GIF_SIG_TRAILER; | |
return TRUE; | |
} | |
FX_BOOL _gif_encode(gif_compress_struct_p gif_ptr, | |
uint8_t*& dst_buf, | |
FX_DWORD& dst_len) { | |
if (!_gif_write_header(gif_ptr, dst_buf, dst_len)) { | |
return FALSE; | |
} | |
FX_DWORD cur_offset = gif_ptr->cur_offset; | |
FX_BOOL res = TRUE; | |
if (gif_ptr->frames) { | |
gif_ptr->cur_offset--; | |
} | |
if (!_gif_write_data(gif_ptr, dst_buf, dst_len)) { | |
gif_ptr->cur_offset = cur_offset; | |
res = FALSE; | |
} | |
dst_len = gif_ptr->cur_offset; | |
dst_buf[dst_len - 1] = GIF_SIG_TRAILER; | |
if (res) { | |
gif_ptr->frames++; | |
} | |
return res; | |
} |