diff options
Diffstat (limited to 'core/fxcodec/lgif/fx_gif.cpp')
| -rw-r--r-- | core/fxcodec/lgif/fx_gif.cpp | 1229 |
1 files changed, 1229 insertions, 0 deletions
diff --git a/core/fxcodec/lgif/fx_gif.cpp b/core/fxcodec/lgif/fx_gif.cpp new file mode 100644 index 0000000000..af447dc84b --- /dev/null +++ b/core/fxcodec/lgif/fx_gif.cpp @@ -0,0 +1,1229 @@ +// 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, 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*>; + 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 == NULL || *gif_ptr_ptr == NULL) { + return; + } + gif_decompress_struct_p gif_ptr = *gif_ptr_ptr; + *gif_ptr_ptr = NULL; + 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 == 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)); + 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; + } + 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; + 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; + 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 == 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; + 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 == 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) { + 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 = 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; + if (gif_ptr->gce_ptr && gce_ptr_ptr) { + *gce_ptr_ptr = gif_ptr->gce_ptr; + gif_ptr->gce_ptr = NULL; + } +} +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) { + 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; + 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); + 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) == NULL) { + 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) == NULL || + gif_read_data(gif_ptr, &data_size_ptr, 1) == NULL) { + 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 = 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->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 = NULL; + } + 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)); + 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 = NULL; + if (gif_read_data(gif_ptr, &loc_pal_ptr, loc_pal_size) == NULL) { + 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 = NULL; + if (gif_read_data(gif_ptr, &code_size_ptr, 1) == NULL) { + 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 == 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); + 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->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) { + *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; + } + 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) { + 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; + 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, + 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; +} |