| // 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; |
| } |
| 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 = (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; |
| 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, |
| 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& 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, 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 == 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; |
| } |
| uint32_t 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; |
| uint32_t 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; |
| 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) == 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; |
| } |
| uint32_t 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; |
| 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 = 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, |
| uint32_t 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, |
| 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** 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, |
| 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 == 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) { |
| 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); |
| 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, |
| 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; |
| } |
