// 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 "core/fxcodec/lgif/fx_gif.h"
|
|
#include "core/fxcodec/lbmp/fx_bmp.h"
|
|
void CGifLZWDecoder::Input(uint8_t* src_buf, uint32_t src_size) {
|
next_in = src_buf;
|
avail_in = src_size;
|
}
|
|
uint32_t CGifLZWDecoder::GetAvailInput() {
|
return avail_in;
|
}
|
|
CGifLZWDecoder::CGifLZWDecoder(FX_CHAR* error_ptr)
|
: code_size(0),
|
code_size_cur(0),
|
code_clear(0),
|
code_end(0),
|
code_next(0),
|
code_first(0),
|
stack_size(0),
|
code_old(0),
|
next_in(nullptr),
|
avail_in(0),
|
bits_left(0),
|
code_store(0),
|
err_msg_ptr(error_ptr) {}
|
|
CGifLZWDecoder::~CGifLZWDecoder() {}
|
|
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 = nullptr;
|
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 = (uint16_t)-1;
|
FXSYS_memset(code_table, 0, sizeof(tag_Table) * GIF_MAX_LZW_CODE);
|
FXSYS_memset(stack, 0, GIF_MAX_LZW_CODE);
|
for (uint16_t i = 0; i < code_clear; i++) {
|
code_table[i].suffix = (uint8_t)i;
|
}
|
}
|
void CGifLZWDecoder::DecodeString(uint16_t 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(uint16_t 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, uint32_t& des_size) {
|
if (des_size == 0) {
|
return 3;
|
}
|
uint32_t 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 -= (uint16_t)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;
|
}
|
uint16_t 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 = (uint16_t)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 != (uint16_t)-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 -= (uint16_t)(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,
|
uint32_t& dst_len,
|
uint32_t size) {
|
if (dst_len < size) {
|
uint32_t len_org = dst_len;
|
while (dst_buf && dst_len < size) {
|
dst_len <<= 1;
|
// TODO(thestig): Probably should be a try-realloc here.
|
dst_buf = FX_Realloc(uint8_t, dst_buf, dst_len);
|
}
|
if (!dst_buf) {
|
dst_len = size;
|
dst_buf = FX_Realloc(uint8_t, dst_buf, dst_len);
|
}
|
FXSYS_memset(dst_buf + len_org, 0, dst_len - len_org);
|
return !!dst_buf;
|
}
|
return TRUE;
|
}
|
static inline void gif_cut_index(uint8_t& val,
|
uint32_t index,
|
uint8_t index_bit,
|
uint8_t index_bit_use,
|
uint8_t bit_use) {
|
uint32_t 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,
|
uint32_t& offset,
|
uint8_t bit_cut,
|
uint8_t& bit_offset,
|
uint32_t& bit_num) {
|
if (bit_cut != 8) {
|
uint16_t 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 (uint16_t 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,
|
uint32_t& 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,
|
uint32_t& dst_len,
|
uint32_t& 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(uint32_t index,
|
uint8_t*& dst_buf,
|
uint32_t& dst_len,
|
uint32_t& 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,
|
uint32_t src_len,
|
uint8_t*& dst_buf,
|
uint32_t& dst_len,
|
uint32_t& 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,
|
uint32_t& offset,
|
uint8_t& out_bit_offset) {
|
for (uint16_t 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, out_bit_offset, src_bit_num);
|
table_cur = i;
|
return TRUE;
|
}
|
}
|
table_cur = code_end + 1;
|
return FALSE;
|
}
|
void CGifLZWEncoder::Finish(uint8_t*& dst_buf,
|
uint32_t& dst_len,
|
uint32_t& 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)
|
return nullptr;
|
|
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*>;
|
gif_ptr->cmt_data_ptr = new CFX_ByteString;
|
gif_ptr->pt_ptr_arr_ptr = new CFX_ArrayTemplate<GifPlainText*>;
|
return gif_ptr;
|
}
|
void gif_destroy_decompress(gif_decompress_struct_pp gif_ptr_ptr) {
|
if (!gif_ptr_ptr || !*gif_ptr_ptr)
|
return;
|
|
gif_decompress_struct_p gif_ptr = *gif_ptr_ptr;
|
*gif_ptr_ptr = nullptr;
|
FX_Free(gif_ptr->global_pal_ptr);
|
delete gif_ptr->img_decoder_ptr;
|
if (gif_ptr->img_ptr_arr_ptr) {
|
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);
|
FX_Free(p->image_info_ptr);
|
FX_Free(p->image_gce_ptr);
|
FX_Free(p->image_row_buf);
|
if (p->local_pal_ptr && 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;
|
}
|
delete gif_ptr->cmt_data_ptr;
|
FX_Free(gif_ptr->gce_ptr);
|
if (gif_ptr->pt_ptr_arr_ptr) {
|
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);
|
FX_Free(p->gce_ptr);
|
FX_Free(p->pte_ptr);
|
delete p->string_ptr;
|
}
|
gif_ptr->pt_ptr_arr_ptr->RemoveAll();
|
delete gif_ptr->pt_ptr_arr_ptr;
|
}
|
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)
|
return nullptr;
|
|
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) {
|
delete (gif_ptr->img_encoder_ptr);
|
FX_Free(gif_ptr);
|
return nullptr;
|
}
|
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) {
|
FX_Free(gif_ptr->header_ptr);
|
delete (gif_ptr->img_encoder_ptr);
|
FX_Free(gif_ptr);
|
return nullptr;
|
}
|
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) {
|
FX_Free(gif_ptr->lsd_ptr);
|
FX_Free(gif_ptr->header_ptr);
|
delete (gif_ptr->img_encoder_ptr);
|
FX_Free(gif_ptr);
|
return nullptr;
|
}
|
FXSYS_memset(gif_ptr->image_info_ptr, 0, sizeof(GifImageInfo));
|
gif_ptr->gce_ptr = (GifGCE*)FX_Alloc(uint8_t, sizeof(GifGCE));
|
if (!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 nullptr;
|
}
|
gif_ptr->pte_ptr = (GifPTE*)FX_Alloc(uint8_t, sizeof(GifPTE));
|
if (!gif_ptr->pte_ptr) {
|
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 nullptr;
|
}
|
FXSYS_memset(gif_ptr->pte_ptr, 0, sizeof(GifPTE));
|
gif_ptr->pte_ptr->block_size = 12;
|
return gif_ptr;
|
}
|
void gif_destroy_compress(gif_compress_struct_pp gif_ptr_ptr) {
|
if (!gif_ptr_ptr || !*gif_ptr_ptr)
|
return;
|
|
gif_compress_struct_p gif_ptr = *gif_ptr_ptr;
|
*gif_ptr_ptr = nullptr;
|
FX_Free(gif_ptr->header_ptr);
|
FX_Free(gif_ptr->lsd_ptr);
|
FX_Free(gif_ptr->global_pal);
|
FX_Free(gif_ptr->image_info_ptr);
|
FX_Free(gif_ptr->local_pal);
|
delete gif_ptr->img_encoder_ptr;
|
FX_Free(gif_ptr->gce_ptr);
|
FX_Free(gif_ptr->cmt_data_ptr);
|
FX_Free(gif_ptr->pte_ptr);
|
FX_Free(gif_ptr);
|
}
|
void gif_error(gif_decompress_struct_p gif_ptr, const FX_CHAR* err_msg) {
|
if (gif_ptr && gif_ptr->gif_error_fn) {
|
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)
|
return 0;
|
|
uint32_t skip_size_org = gif_ptr->skip_size;
|
ASSERT(sizeof(GifHeader) == 6);
|
GifHeader* gif_header_ptr = nullptr;
|
if (!gif_read_data(gif_ptr, (uint8_t**)&gif_header_ptr, 6))
|
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 = nullptr;
|
if (!gif_read_data(gif_ptr, (uint8_t**)&gif_lsd_ptr, 7)) {
|
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 = nullptr;
|
if (!gif_read_data(gif_ptr, &global_pal_ptr, global_pal_size)) {
|
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;
|
FX_Free(gif_ptr->global_pal_ptr);
|
gif_ptr->global_pal_ptr = (GifPalette*)FX_Alloc(uint8_t, global_pal_size);
|
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)
|
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 = nullptr;
|
if (!gif_read_data(gif_ptr, &sig_ptr, 1))
|
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 = nullptr;
|
if (!gif_read_data(gif_ptr, &ext_ptr, 1))
|
return 2;
|
|
switch (*ext_ptr) {
|
case GIF_BLOCK_CE:
|
gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_CE);
|
continue;
|
case GIF_BLOCK_GCE:
|
gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_GCE);
|
continue;
|
case GIF_BLOCK_PTE:
|
gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_PTE);
|
continue;
|
default: {
|
int32_t status = GIF_D_STATUS_EXT_UNE;
|
if (*ext_ptr == GIF_BLOCK_PTE) {
|
status = GIF_D_STATUS_EXT_PTE;
|
}
|
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 = nullptr;
|
uint8_t* data_ptr = nullptr;
|
uint32_t skip_size_org = gif_ptr->skip_size;
|
if (!gif_read_data(gif_ptr, &data_size_ptr, 1))
|
return 2;
|
|
while (*data_size_ptr != GIF_BLOCK_TERMINAL) {
|
if (!gif_read_data(gif_ptr, &data_ptr, *data_size_ptr)) {
|
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))
|
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 = nullptr;
|
if (gif_ptr->gce_ptr && gce_ptr_ptr) {
|
*gce_ptr_ptr = gif_ptr->gce_ptr;
|
gif_ptr->gce_ptr = nullptr;
|
}
|
}
|
int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr) {
|
uint8_t* data_size_ptr = nullptr;
|
uint8_t* data_ptr = nullptr;
|
uint32_t skip_size_org = gif_ptr->skip_size;
|
switch (gif_ptr->decode_status) {
|
case GIF_D_STATUS_EXT_CE: {
|
if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) {
|
gif_ptr->skip_size = skip_size_org;
|
return 2;
|
}
|
gif_ptr->cmt_data_ptr->clear();
|
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) ||
|
!gif_read_data(gif_ptr, &data_size_ptr, 1)) {
|
gif_ptr->skip_size = skip_size_org;
|
return 2;
|
}
|
*(gif_ptr->cmt_data_ptr) +=
|
CFX_ByteString((const FX_CHAR*)data_ptr, data_size);
|
}
|
} break;
|
case GIF_D_STATUS_EXT_PTE: {
|
ASSERT(sizeof(GifPTE) == 13);
|
GifPTE* gif_pte_ptr = nullptr;
|
if (!gif_read_data(gif_ptr, (uint8_t**)&gif_pte_ptr, 13)) {
|
return 2;
|
}
|
GifPlainText* gif_pt_ptr = FX_Alloc(GifPlainText, 1);
|
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_pt_ptr->string_ptr = new CFX_ByteString;
|
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)) {
|
gif_ptr->skip_size = skip_size_org;
|
if (gif_pt_ptr) {
|
FX_Free(gif_pt_ptr->gce_ptr);
|
FX_Free(gif_pt_ptr->pte_ptr);
|
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) ||
|
!gif_read_data(gif_ptr, &data_size_ptr, 1)) {
|
gif_ptr->skip_size = skip_size_org;
|
if (gif_pt_ptr) {
|
FX_Free(gif_pt_ptr->gce_ptr);
|
FX_Free(gif_pt_ptr->pte_ptr);
|
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;
|
case GIF_D_STATUS_EXT_GCE: {
|
ASSERT(sizeof(GifGCE) == 5);
|
GifGCE* gif_gce_ptr = nullptr;
|
if (!gif_read_data(gif_ptr, (uint8_t**)&gif_gce_ptr, 6))
|
return 2;
|
|
if (!gif_ptr->gce_ptr)
|
gif_ptr->gce_ptr = (GifGCE*)FX_Alloc(uint8_t, sizeof(GifGCE));
|
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;
|
default: {
|
if (gif_ptr->decode_status == GIF_D_STATUS_EXT_PTE) {
|
FX_Free(gif_ptr->gce_ptr);
|
gif_ptr->gce_ptr = nullptr;
|
}
|
if (!gif_read_data(gif_ptr, &data_size_ptr, 1))
|
return 2;
|
|
while (*data_size_ptr != GIF_BLOCK_TERMINAL) {
|
if (!gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) ||
|
!gif_read_data(gif_ptr, &data_size_ptr, 1)) {
|
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;
|
}
|
uint32_t skip_size_org = gif_ptr->skip_size;
|
ASSERT(sizeof(GifImageInfo) == 9);
|
GifImageInfo* gif_img_info_ptr = nullptr;
|
if (!gif_read_data(gif_ptr, (uint8_t**)&gif_img_info_ptr, 9))
|
return 2;
|
|
GifImage* gif_image_ptr = (GifImage*)FX_Alloc(uint8_t, sizeof(GifImage));
|
FXSYS_memset(gif_image_ptr, 0, sizeof(GifImage));
|
gif_image_ptr->image_info_ptr =
|
(GifImageInfo*)FX_Alloc(uint8_t, sizeof(GifImageInfo));
|
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) {
|
FX_Free(gif_image_ptr->image_info_ptr);
|
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 = nullptr;
|
if (!gif_read_data(gif_ptr, &loc_pal_ptr, loc_pal_size)) {
|
gif_ptr->skip_size = skip_size_org;
|
FX_Free(gif_image_ptr->image_info_ptr);
|
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) {
|
FXSYS_memcpy((uint8_t*)gif_image_ptr->local_pal_ptr, loc_pal_ptr,
|
loc_pal_size);
|
}
|
}
|
uint8_t* code_size_ptr = nullptr;
|
if (!gif_read_data(gif_ptr, &code_size_ptr, 1)) {
|
gif_ptr->skip_size = skip_size_org;
|
FX_Free(gif_image_ptr->image_info_ptr);
|
FX_Free(gif_image_ptr->local_pal_ptr);
|
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 || frame_num < 0 ||
|
frame_num >= gif_ptr->img_ptr_arr_ptr->GetSize()) {
|
return 0;
|
}
|
uint8_t* data_size_ptr = nullptr;
|
uint8_t* data_ptr = nullptr;
|
uint32_t skip_size_org = gif_ptr->skip_size;
|
GifImage* gif_image_ptr = gif_ptr->img_ptr_arr_ptr->GetAt(frame_num);
|
uint32_t 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 = nullptr;
|
}
|
gif_image_ptr->image_row_buf = FX_Alloc(uint8_t, gif_img_row_bytes);
|
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) {
|
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 = nullptr;
|
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 = nullptr;
|
gif_error(gif_ptr, "Error Read Record Position Data");
|
return 0;
|
}
|
}
|
if (!gif_ptr->img_decoder_ptr)
|
gif_ptr->img_decoder_ptr = new CGifLZWDecoder(gif_ptr->err_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))
|
return 2;
|
|
if (*data_size_ptr != GIF_BLOCK_TERMINAL) {
|
if (!gif_read_data(gif_ptr, &data_ptr, *data_size_ptr)) {
|
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 = nullptr;
|
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 = nullptr;
|
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))
|
return 2;
|
|
if (*data_size_ptr != GIF_BLOCK_TERMINAL) {
|
if (!gif_read_data(gif_ptr, &data_ptr, *data_size_ptr)) {
|
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 = nullptr;
|
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,
|
uint32_t data_size) {
|
if (!gif_ptr || gif_ptr->avail_in < gif_ptr->skip_size + data_size)
|
return nullptr;
|
|
*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,
|
uint32_t src_size) {
|
gif_ptr->next_in = src_buf;
|
gif_ptr->avail_in = src_size;
|
gif_ptr->skip_size = 0;
|
}
|
uint32_t gif_get_avail_input(gif_decompress_struct_p gif_ptr,
|
uint8_t** avail_buf_ptr) {
|
if (avail_buf_ptr) {
|
*avail_buf_ptr = nullptr;
|
if (gif_ptr->avail_in > 0) {
|
*avail_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,
|
uint32_t& 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)
|
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) {
|
uint16_t 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, uint32_t pitch, uint32_t height) {
|
CFX_ArrayTemplate<uint8_t*> pass[4];
|
int i, j;
|
uint32_t 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);
|
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,
|
uint32_t src_len,
|
uint8_t*& dst_buf,
|
uint32_t& dst_len,
|
uint32_t& dst_offset) {
|
uint32_t 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,
|
uint32_t& dst_len) {
|
if (!gif_grow_buf(dst_buf, dst_len, gif_ptr->cur_offset + GIF_DATA_BLOCK)) {
|
return FALSE;
|
}
|
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;
|
}
|
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) {
|
uint32_t 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);
|
uint32_t 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;
|
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;
|
}
|
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;
|
}
|
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,
|
uint32_t& dst_len) {
|
if (!gif_write_header(gif_ptr, dst_buf, dst_len)) {
|
return FALSE;
|
}
|
uint32_t 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;
|
}
|
