From 2199ab8e048ae19ee3ae01afe640ce3a66092a00 Mon Sep 17 00:00:00 2001 From: Nicolas Pena Date: Thu, 11 May 2017 18:44:29 -0400 Subject: Merge FXGIF_Context and CGifDecompressor into CGifContext MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: I60c9cbd83ff9e7a30a5a570a6ad1cf8f52360c07 Reviewed-on: https://pdfium-review.googlesource.com/5410 Reviewed-by: Tom Sepez Commit-Queue: Nicolás Peña --- core/fxcodec/lgif/fx_gif.cpp | 347 +++++++++++++++++++++---------------------- 1 file changed, 173 insertions(+), 174 deletions(-) (limited to 'core/fxcodec/lgif/fx_gif.cpp') diff --git a/core/fxcodec/lgif/fx_gif.cpp b/core/fxcodec/lgif/fx_gif.cpp index 4248c88a01..b9ff41cc2e 100644 --- a/core/fxcodec/lgif/fx_gif.cpp +++ b/core/fxcodec/lgif/fx_gif.cpp @@ -10,7 +10,7 @@ #include #include "core/fxcodec/lbmp/fx_bmp.h" -#include "core/fxcodec/lgif/cgifdecompressor.h" +#include "core/fxcodec/lgif/cgifcontext.h" #include "third_party/base/ptr_util.h" #include "third_party/base/stl_util.h" @@ -24,60 +24,60 @@ static_assert(sizeof(GifLSD) == 7, "GifLSD should have a size of 7"); namespace { -uint8_t* gif_read_data(CGifDecompressor* gif_ptr, +uint8_t* gif_read_data(CGifContext* context, uint8_t** des_buf_pp, uint32_t data_size) { - if (!gif_ptr || gif_ptr->avail_in < gif_ptr->skip_size + data_size) + if (!context || context->avail_in < context->skip_size + data_size) return nullptr; - *des_buf_pp = gif_ptr->next_in + gif_ptr->skip_size; - gif_ptr->skip_size += data_size; + *des_buf_pp = context->next_in + context->skip_size; + context->skip_size += data_size; return *des_buf_pp; } -void gif_save_decoding_status(CGifDecompressor* 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; +void gif_save_decoding_status(CGifContext* context, int32_t status) { + context->decode_status = status; + context->next_in += context->skip_size; + context->avail_in -= context->skip_size; + context->skip_size = 0; } -GifDecodeStatus gif_decode_extension(CGifDecompressor* gif_ptr) { +GifDecodeStatus gif_decode_extension(CGifContext* context) { 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) { + uint32_t skip_size_org = context->skip_size; + switch (context->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; + if (!gif_read_data(context, &data_size_ptr, 1)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } - gif_ptr->cmt_data.clear(); + context->cmt_data.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; + if (!gif_read_data(context, &data_ptr, *data_size_ptr) || + !gif_read_data(context, &data_size_ptr, 1)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } - gif_ptr->cmt_data += CFX_ByteString(data_ptr, data_size); + context->cmt_data += CFX_ByteString(data_ptr, data_size); } break; } case GIF_D_STATUS_EXT_PTE: { GifPTE* gif_pte = nullptr; - if (!gif_read_data(gif_ptr, reinterpret_cast(&gif_pte), 13)) + if (!gif_read_data(context, reinterpret_cast(&gif_pte), 13)) return GifDecodeStatus::Unfinished; - gif_ptr->m_GifGCE = nullptr; - if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) { - gif_ptr->skip_size = skip_size_org; + context->m_GifGCE = nullptr; + if (!gif_read_data(context, &data_size_ptr, 1)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } 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; + if (!gif_read_data(context, &data_ptr, *data_size_ptr) || + !gif_read_data(context, &data_size_ptr, 1)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } } @@ -85,45 +85,45 @@ GifDecodeStatus gif_decode_extension(CGifDecompressor* gif_ptr) { } case GIF_D_STATUS_EXT_GCE: { GifGCE* gif_gce_ptr = nullptr; - if (!gif_read_data(gif_ptr, reinterpret_cast(&gif_gce_ptr), 6)) + if (!gif_read_data(context, reinterpret_cast(&gif_gce_ptr), 6)) return GifDecodeStatus::Unfinished; - if (!gif_ptr->m_GifGCE.get()) - gif_ptr->m_GifGCE = pdfium::MakeUnique(); - gif_ptr->m_GifGCE->block_size = gif_gce_ptr->block_size; - gif_ptr->m_GifGCE->gce_flag = gif_gce_ptr->gce_flag; - gif_ptr->m_GifGCE->delay_time = GetWord_LSBFirst( + if (!context->m_GifGCE.get()) + context->m_GifGCE = pdfium::MakeUnique(); + context->m_GifGCE->block_size = gif_gce_ptr->block_size; + context->m_GifGCE->gce_flag = gif_gce_ptr->gce_flag; + context->m_GifGCE->delay_time = GetWord_LSBFirst( reinterpret_cast(&gif_gce_ptr->delay_time)); - gif_ptr->m_GifGCE->trans_index = gif_gce_ptr->trans_index; + context->m_GifGCE->trans_index = gif_gce_ptr->trans_index; break; } default: { - if (gif_ptr->decode_status == GIF_D_STATUS_EXT_PTE) - gif_ptr->m_GifGCE = nullptr; - if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) + if (context->decode_status == GIF_D_STATUS_EXT_PTE) + context->m_GifGCE = nullptr; + if (!gif_read_data(context, &data_size_ptr, 1)) return GifDecodeStatus::Unfinished; 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; + if (!gif_read_data(context, &data_ptr, *data_size_ptr) || + !gif_read_data(context, &data_size_ptr, 1)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } } } } - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_SIG); + gif_save_decoding_status(context, GIF_D_STATUS_SIG); return GifDecodeStatus::Success; } -GifDecodeStatus gif_decode_image_info(CGifDecompressor* gif_ptr) { - if (gif_ptr->width == 0 || gif_ptr->height == 0) { - gif_ptr->ErrorData("No Image Header Info"); +GifDecodeStatus gif_decode_image_info(CGifContext* context) { + if (context->width == 0 || context->height == 0) { + context->ErrorData("No Image Header Info"); return GifDecodeStatus::Error; } - uint32_t skip_size_org = gif_ptr->skip_size; + uint32_t skip_size_org = context->skip_size; GifImageInfo* gif_img_info_ptr = nullptr; - if (!gif_read_data(gif_ptr, reinterpret_cast(&gif_img_info_ptr), + if (!gif_read_data(context, reinterpret_cast(&gif_img_info_ptr), 9)) return GifDecodeStatus::Unfinished; @@ -138,18 +138,18 @@ GifDecodeStatus gif_decode_image_info(CGifDecompressor* gif_ptr) { GetWord_LSBFirst(reinterpret_cast(&gif_img_info_ptr->height)); gif_image->m_ImageInfo.local_flag = gif_img_info_ptr->local_flag; if (gif_image->m_ImageInfo.left + gif_image->m_ImageInfo.width > - gif_ptr->width || + context->width || gif_image->m_ImageInfo.top + gif_image->m_ImageInfo.height > - gif_ptr->height) { - gif_ptr->ErrorData("Image Data Out Of LSD, The File May Be Corrupt"); + context->height) { + context->ErrorData("Image Data Out Of LSD, The File May Be Corrupt"); return GifDecodeStatus::Error; } GifLF* gif_img_info_lf_ptr = (GifLF*)&gif_img_info_ptr->local_flag; if (gif_img_info_lf_ptr->local_pal) { 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; + if (!gif_read_data(context, &loc_pal_ptr, loc_pal_size)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } gif_image->m_LocalPalettes = std::vector(loc_pal_size / 3); @@ -157,28 +157,28 @@ GifDecodeStatus gif_decode_image_info(CGifDecompressor* gif_ptr) { reinterpret_cast(gif_image->m_LocalPalettes.data())); } uint8_t* code_size_ptr = nullptr; - if (!gif_read_data(gif_ptr, &code_size_ptr, 1)) { - gif_ptr->skip_size = skip_size_org; + if (!gif_read_data(context, &code_size_ptr, 1)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } gif_image->image_code_size = *code_size_ptr; - gif_ptr->RecordCurrentPosition(&gif_image->image_data_pos); - gif_image->image_data_pos += gif_ptr->skip_size; + context->RecordCurrentPosition(&gif_image->image_data_pos); + gif_image->image_data_pos += context->skip_size; gif_image->m_ImageGCE = nullptr; - if (gif_ptr->m_GifGCE.get()) { - gif_image->m_ImageGCE = std::move(gif_ptr->m_GifGCE); - gif_ptr->m_GifGCE = nullptr; + if (context->m_GifGCE.get()) { + gif_image->m_ImageGCE = std::move(context->m_GifGCE); + context->m_GifGCE = nullptr; } - gif_ptr->m_Images.push_back(std::move(gif_image)); - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); + context->m_Images.push_back(std::move(gif_image)); + gif_save_decoding_status(context, GIF_D_STATUS_IMG_DATA); return GifDecodeStatus::Success; } -void gif_decoding_failure_at_tail_cleanup(CGifDecompressor* gif_ptr, +void gif_decoding_failure_at_tail_cleanup(CGifContext* context, GifImage* gif_image_ptr) { gif_image_ptr->m_ImageRowBuf.clear(); - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); - gif_ptr->ErrorData("Decode Image Data Error"); + gif_save_decoding_status(context, GIF_D_STATUS_TAIL); + context->ErrorData("Decode Image Data Error"); } } // namespace @@ -350,77 +350,77 @@ GifDecodeStatus CGifLZWDecoder::Decode(uint8_t* des_buf, uint32_t* des_size) { return GifDecodeStatus::Error; } -GifDecodeStatus gif_read_header(CGifDecompressor* gif_ptr) { - if (!gif_ptr) +GifDecodeStatus gif_read_header(CGifContext* context) { + if (!context) return GifDecodeStatus::Error; - uint32_t skip_size_org = gif_ptr->skip_size; + uint32_t skip_size_org = context->skip_size; GifHeader* gif_header_ptr = nullptr; - if (!gif_read_data(gif_ptr, reinterpret_cast(&gif_header_ptr), 6)) + if (!gif_read_data(context, reinterpret_cast(&gif_header_ptr), 6)) return GifDecodeStatus::Unfinished; if (strncmp(gif_header_ptr->signature, GIF_SIGNATURE, 3) != 0 || gif_header_ptr->version[0] != '8' || gif_header_ptr->version[2] != 'a') { - gif_ptr->ErrorData("Not A Gif Image"); + context->ErrorData("Not A Gif Image"); return GifDecodeStatus::Error; } GifLSD* gif_lsd_ptr = nullptr; - if (!gif_read_data(gif_ptr, reinterpret_cast(&gif_lsd_ptr), 7)) { - gif_ptr->skip_size = skip_size_org; + if (!gif_read_data(context, reinterpret_cast(&gif_lsd_ptr), 7)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } if (reinterpret_cast(&gif_lsd_ptr->global_flag)->global_pal) { - gif_ptr->global_pal_num = + context->global_pal_num = 2 << reinterpret_cast(&gif_lsd_ptr->global_flag)->pal_bits; - int32_t global_pal_size = gif_ptr->global_pal_num * 3; + int32_t global_pal_size = context->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; + if (!gif_read_data(context, &global_pal_ptr, global_pal_size)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } - gif_ptr->global_sort_flag = ((GifGF*)&gif_lsd_ptr->global_flag)->sort_flag; - gif_ptr->global_color_resolution = + context->global_sort_flag = ((GifGF*)&gif_lsd_ptr->global_flag)->sort_flag; + context->global_color_resolution = ((GifGF*)&gif_lsd_ptr->global_flag)->color_resolution; - gif_ptr->m_GlobalPalette.resize(global_pal_size / 3); - memcpy(gif_ptr->m_GlobalPalette.data(), global_pal_ptr, global_pal_size); + context->m_GlobalPalette.resize(global_pal_size / 3); + memcpy(context->m_GlobalPalette.data(), global_pal_ptr, global_pal_size); } - gif_ptr->width = + context->width = (int)GetWord_LSBFirst(reinterpret_cast(&gif_lsd_ptr->width)); - gif_ptr->height = + context->height = (int)GetWord_LSBFirst(reinterpret_cast(&gif_lsd_ptr->height)); - gif_ptr->bc_index = gif_lsd_ptr->bc_index; - gif_ptr->pixel_aspect = gif_lsd_ptr->pixel_aspect; + context->bc_index = gif_lsd_ptr->bc_index; + context->pixel_aspect = gif_lsd_ptr->pixel_aspect; return GifDecodeStatus::Success; } -GifDecodeStatus gif_get_frame(CGifDecompressor* gif_ptr) { - if (!gif_ptr) +GifDecodeStatus gif_get_frame(CGifContext* context) { + if (!context) return GifDecodeStatus::Error; GifDecodeStatus ret = GifDecodeStatus::Success; while (true) { - switch (gif_ptr->decode_status) { + switch (context->decode_status) { case GIF_D_STATUS_TAIL: return GifDecodeStatus::Success; case GIF_D_STATUS_SIG: { uint8_t* sig_ptr = nullptr; - if (!gif_read_data(gif_ptr, &sig_ptr, 1)) + if (!gif_read_data(context, &sig_ptr, 1)) return GifDecodeStatus::Unfinished; switch (*sig_ptr) { case GIF_SIG_EXTENSION: - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT); + gif_save_decoding_status(context, GIF_D_STATUS_EXT); continue; case GIF_SIG_IMAGE: - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_INFO); + gif_save_decoding_status(context, GIF_D_STATUS_IMG_INFO); continue; case GIF_SIG_TRAILER: - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); + gif_save_decoding_status(context, GIF_D_STATUS_TAIL); return GifDecodeStatus::Success; default: - if (gif_ptr->avail_in) { + if (context->avail_in) { // The Gif File has non_standard Tag! - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_SIG); + gif_save_decoding_status(context, GIF_D_STATUS_SIG); continue; } // The Gif File Doesn't have Trailer Tag! @@ -429,31 +429,31 @@ GifDecodeStatus gif_get_frame(CGifDecompressor* gif_ptr) { } case GIF_D_STATUS_EXT: { uint8_t* ext_ptr = nullptr; - if (!gif_read_data(gif_ptr, &ext_ptr, 1)) + if (!gif_read_data(context, &ext_ptr, 1)) return GifDecodeStatus::Unfinished; switch (*ext_ptr) { case GIF_BLOCK_CE: - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_CE); + gif_save_decoding_status(context, GIF_D_STATUS_EXT_CE); continue; case GIF_BLOCK_GCE: - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_GCE); + gif_save_decoding_status(context, GIF_D_STATUS_EXT_GCE); continue; case GIF_BLOCK_PTE: - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_EXT_PTE); + gif_save_decoding_status(context, 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); + gif_save_decoding_status(context, status); continue; } } } case GIF_D_STATUS_IMG_INFO: { - ret = gif_decode_image_info(gif_ptr); + ret = gif_decode_image_info(context); if (ret != GifDecodeStatus::Success) return ret; continue; @@ -461,25 +461,25 @@ GifDecodeStatus gif_get_frame(CGifDecompressor* gif_ptr) { 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)) + uint32_t skip_size_org = context->skip_size; + if (!gif_read_data(context, &data_size_ptr, 1)) return GifDecodeStatus::Unfinished; 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; + if (!gif_read_data(context, &data_ptr, *data_size_ptr)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } - 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)) + gif_save_decoding_status(context, GIF_D_STATUS_IMG_DATA); + skip_size_org = context->skip_size; + if (!gif_read_data(context, &data_size_ptr, 1)) return GifDecodeStatus::Unfinished; } - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_SIG); + gif_save_decoding_status(context, GIF_D_STATUS_SIG); continue; } default: { - ret = gif_decode_extension(gif_ptr); + ret = gif_decode_extension(context); if (ret != GifDecodeStatus::Success) return ret; break; @@ -489,32 +489,32 @@ GifDecodeStatus gif_get_frame(CGifDecompressor* gif_ptr) { return GifDecodeStatus::Success; } -GifDecodeStatus gif_load_frame(CGifDecompressor* gif_ptr, int32_t frame_num) { - if (!gif_ptr || !pdfium::IndexInBounds(gif_ptr->m_Images, frame_num)) +GifDecodeStatus gif_load_frame(CGifContext* context, int32_t frame_num) { + if (!context || !pdfium::IndexInBounds(context->m_Images, frame_num)) return GifDecodeStatus::Error; 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->m_Images[frame_num].get(); + uint32_t skip_size_org = context->skip_size; + GifImage* gif_image_ptr = context->m_Images[frame_num].get(); uint32_t gif_img_row_bytes = gif_image_ptr->m_ImageInfo.width; if (gif_img_row_bytes == 0) { - gif_ptr->ErrorData("Error Invalid Number of Row Bytes"); + context->ErrorData("Error Invalid Number of Row Bytes"); return GifDecodeStatus::Error; } - if (gif_ptr->decode_status == GIF_D_STATUS_TAIL) { + if (context->decode_status == GIF_D_STATUS_TAIL) { gif_image_ptr->m_ImageRowBuf.resize(gif_img_row_bytes); GifGCE* gif_img_gce_ptr = gif_image_ptr->m_ImageGCE.get(); int32_t loc_pal_num = ((GifLF*)&gif_image_ptr->m_ImageInfo.local_flag)->local_pal ? (2 << ((GifLF*)&gif_image_ptr->m_ImageInfo.local_flag)->pal_bits) : 0; - gif_ptr->avail_in = 0; + context->avail_in = 0; GifPalette* pLocalPalette = gif_image_ptr->m_LocalPalettes.empty() ? nullptr : gif_image_ptr->m_LocalPalettes.data(); if (!gif_img_gce_ptr) { - bool bRes = gif_ptr->GetRecordPosition( + bool bRes = context->GetRecordPosition( gif_image_ptr->image_data_pos, gif_image_ptr->m_ImageInfo.left, gif_image_ptr->m_ImageInfo.top, gif_image_ptr->m_ImageInfo.width, gif_image_ptr->m_ImageInfo.height, loc_pal_num, pLocalPalette, 0, 0, @@ -522,11 +522,11 @@ GifDecodeStatus gif_load_frame(CGifDecompressor* gif_ptr, int32_t frame_num) { (bool)((GifLF*)&gif_image_ptr->m_ImageInfo.local_flag)->interlace); if (!bRes) { gif_image_ptr->m_ImageRowBuf.clear(); - gif_ptr->ErrorData("Error Read Record Position Data"); + context->ErrorData("Error Read Record Position Data"); return GifDecodeStatus::Error; } } else { - bool bRes = gif_ptr->GetRecordPosition( + bool bRes = context->GetRecordPosition( gif_image_ptr->image_data_pos, gif_image_ptr->m_ImageInfo.left, gif_image_ptr->m_ImageInfo.top, gif_image_ptr->m_ImageInfo.width, gif_image_ptr->m_ImageInfo.height, loc_pal_num, pLocalPalette, @@ -540,131 +540,130 @@ GifDecodeStatus gif_load_frame(CGifDecompressor* gif_ptr, int32_t frame_num) { (bool)((GifLF*)&gif_image_ptr->m_ImageInfo.local_flag)->interlace); if (!bRes) { gif_image_ptr->m_ImageRowBuf.clear(); - gif_ptr->ErrorData("Error Read Record Position Data"); + context->ErrorData("Error Read Record Position Data"); return GifDecodeStatus::Error; } } if (gif_image_ptr->image_code_size >= 32) { gif_image_ptr->m_ImageRowBuf.clear(); - gif_ptr->ErrorData("Error Invalid Code Size"); + context->ErrorData("Error Invalid Code Size"); return GifDecodeStatus::Error; } - if (!gif_ptr->m_ImgDecoder.get()) - gif_ptr->m_ImgDecoder = - pdfium::MakeUnique(gif_ptr->err_ptr); - gif_ptr->m_ImgDecoder->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; + if (!context->m_ImgDecoder.get()) + context->m_ImgDecoder = + pdfium::MakeUnique(context->err_ptr); + context->m_ImgDecoder->InitTable(gif_image_ptr->image_code_size); + context->img_row_offset = 0; + context->img_row_avail_size = 0; + context->img_pass_num = 0; gif_image_ptr->image_row_num = 0; - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); + gif_save_decoding_status(context, GIF_D_STATUS_IMG_DATA); } - CGifLZWDecoder* img_decoder_ptr = gif_ptr->m_ImgDecoder.get(); - if (gif_ptr->decode_status == GIF_D_STATUS_IMG_DATA) { - if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) + CGifLZWDecoder* img_decoder_ptr = context->m_ImgDecoder.get(); + if (context->decode_status == GIF_D_STATUS_IMG_DATA) { + if (!gif_read_data(context, &data_size_ptr, 1)) return GifDecodeStatus::Unfinished; 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; + if (!gif_read_data(context, &data_ptr, *data_size_ptr)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } 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; + gif_save_decoding_status(context, GIF_D_STATUS_IMG_DATA); + context->img_row_offset += context->img_row_avail_size; + context->img_row_avail_size = gif_img_row_bytes - context->img_row_offset; GifDecodeStatus ret = img_decoder_ptr->Decode( - gif_image_ptr->m_ImageRowBuf.data() + gif_ptr->img_row_offset, - &gif_ptr->img_row_avail_size); + gif_image_ptr->m_ImageRowBuf.data() + context->img_row_offset, + &context->img_row_avail_size); if (ret == GifDecodeStatus::Error) { - gif_decoding_failure_at_tail_cleanup(gif_ptr, gif_image_ptr); + gif_decoding_failure_at_tail_cleanup(context, gif_image_ptr); return GifDecodeStatus::Error; } while (ret != GifDecodeStatus::Error) { if (ret == GifDecodeStatus::Success) { - gif_ptr->ReadScanline(gif_image_ptr->image_row_num, + context->ReadScanline(gif_image_ptr->image_row_num, gif_image_ptr->m_ImageRowBuf.data()); gif_image_ptr->m_ImageRowBuf.clear(); - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); + gif_save_decoding_status(context, GIF_D_STATUS_TAIL); return GifDecodeStatus::Success; } if (ret == GifDecodeStatus::Unfinished) { ASSERT(img_decoder_ptr->GetAvailInput() == 0); - skip_size_org = gif_ptr->skip_size; - if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) + skip_size_org = context->skip_size; + if (!gif_read_data(context, &data_size_ptr, 1)) return GifDecodeStatus::Unfinished; 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; + if (!gif_read_data(context, &data_ptr, *data_size_ptr)) { + context->skip_size = skip_size_org; return GifDecodeStatus::Unfinished; } 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; + gif_save_decoding_status(context, GIF_D_STATUS_IMG_DATA); + context->img_row_offset += context->img_row_avail_size; + context->img_row_avail_size = + gif_img_row_bytes - context->img_row_offset; ret = img_decoder_ptr->Decode( - gif_image_ptr->m_ImageRowBuf.data() + gif_ptr->img_row_offset, - &gif_ptr->img_row_avail_size); + gif_image_ptr->m_ImageRowBuf.data() + context->img_row_offset, + &context->img_row_avail_size); } } if (ret == GifDecodeStatus::InsufficientDestSize) { if (((GifLF*)&gif_image_ptr->m_ImageInfo.local_flag)->interlace) { - gif_ptr->ReadScanline(gif_image_ptr->image_row_num, + context->ReadScanline(gif_image_ptr->image_row_num, gif_image_ptr->m_ImageRowBuf.data()); gif_image_ptr->image_row_num += - s_gif_interlace_step[gif_ptr->img_pass_num]; + s_gif_interlace_step[context->img_pass_num]; if (gif_image_ptr->image_row_num >= (int32_t)gif_image_ptr->m_ImageInfo.height) { - gif_ptr->img_pass_num++; - if (gif_ptr->img_pass_num == FX_ArraySize(s_gif_interlace_step)) { - gif_decoding_failure_at_tail_cleanup(gif_ptr, gif_image_ptr); + context->img_pass_num++; + if (context->img_pass_num == FX_ArraySize(s_gif_interlace_step)) { + gif_decoding_failure_at_tail_cleanup(context, gif_image_ptr); return GifDecodeStatus::Error; } gif_image_ptr->image_row_num = - s_gif_interlace_step[gif_ptr->img_pass_num] / 2; + s_gif_interlace_step[context->img_pass_num] / 2; } } else { - gif_ptr->ReadScanline(gif_image_ptr->image_row_num++, + context->ReadScanline(gif_image_ptr->image_row_num++, gif_image_ptr->m_ImageRowBuf.data()); } - gif_ptr->img_row_offset = 0; - gif_ptr->img_row_avail_size = gif_img_row_bytes; + context->img_row_offset = 0; + context->img_row_avail_size = gif_img_row_bytes; ret = img_decoder_ptr->Decode( - gif_image_ptr->m_ImageRowBuf.data() + gif_ptr->img_row_offset, - &gif_ptr->img_row_avail_size); + gif_image_ptr->m_ImageRowBuf.data() + context->img_row_offset, + &context->img_row_avail_size); } if (ret == GifDecodeStatus::Error) { - gif_decoding_failure_at_tail_cleanup(gif_ptr, gif_image_ptr); + gif_decoding_failure_at_tail_cleanup(context, gif_image_ptr); return GifDecodeStatus::Error; } } } - gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); + gif_save_decoding_status(context, GIF_D_STATUS_TAIL); } - gif_ptr->ErrorData("Decode Image Data Error"); + context->ErrorData("Decode Image Data Error"); return GifDecodeStatus::Error; } -void gif_input_buffer(CGifDecompressor* gif_ptr, +void gif_input_buffer(CGifContext* context, 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; + context->next_in = src_buf; + context->avail_in = src_size; + context->skip_size = 0; } -uint32_t gif_get_avail_input(CGifDecompressor* gif_ptr, - uint8_t** avail_buf_ptr) { +uint32_t gif_get_avail_input(CGifContext* context, 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; + if (context->avail_in > 0) + *avail_buf_ptr = context->next_in; } - return gif_ptr->avail_in; + return context->avail_in; } -int32_t gif_get_frame_num(CGifDecompressor* gif_ptr) { - return pdfium::CollectionSize(gif_ptr->m_Images); +int32_t gif_get_frame_num(CGifContext* context) { + return pdfium::CollectionSize(context->m_Images); } -- cgit v1.2.3