diff options
Diffstat (limited to 'core/fxcodec')
| -rw-r--r-- | core/fxcodec/codec/ccodec_gifmodule.cpp | 45 | ||||
| -rw-r--r-- | core/fxcodec/codec/ccodec_gifmodule.h | 23 | ||||
| -rw-r--r-- | core/fxcodec/codec/fx_codec_progress.cpp | 18 | ||||
| -rw-r--r-- | core/fxcodec/lgif/fx_gif.cpp | 167 | ||||
| -rw-r--r-- | core/fxcodec/lgif/fx_gif.h | 16 |
5 files changed, 140 insertions, 129 deletions
diff --git a/core/fxcodec/codec/ccodec_gifmodule.cpp b/core/fxcodec/codec/ccodec_gifmodule.cpp index ca9fd07ba6..b53880587e 100644 --- a/core/fxcodec/codec/ccodec_gifmodule.cpp +++ b/core/fxcodec/codec/ccodec_gifmodule.cpp @@ -115,18 +115,18 @@ void CCodec_GifModule::Finish(FXGIF_Context* ctx) { } } -int32_t CCodec_GifModule::ReadHeader(FXGIF_Context* ctx, - int* width, - int* height, - int* pal_num, - void** pal_pp, - int* bg_index, - CFX_DIBAttribute* pAttribute) { +GifDecodeStatus CCodec_GifModule::ReadHeader(FXGIF_Context* ctx, + int* width, + int* height, + int* pal_num, + void** pal_pp, + int* bg_index, + CFX_DIBAttribute* pAttribute) { if (setjmp(ctx->gif_ptr->jmpbuf)) - return 0; + return GifDecodeStatus::Error; - int32_t ret = gif_read_header(ctx->gif_ptr); - if (ret != 1) + GifDecodeStatus ret = gif_read_header(ctx->gif_ptr); + if (ret != GifDecodeStatus::Success) return ret; *width = ctx->gif_ptr->width; @@ -134,29 +134,30 @@ int32_t CCodec_GifModule::ReadHeader(FXGIF_Context* ctx, *pal_num = ctx->gif_ptr->global_pal_num; *pal_pp = ctx->gif_ptr->global_pal_ptr; *bg_index = ctx->gif_ptr->bc_index; - return 1; + return GifDecodeStatus::Success; } -int32_t CCodec_GifModule::LoadFrameInfo(FXGIF_Context* ctx, int* frame_num) { +GifDecodeStatus CCodec_GifModule::LoadFrameInfo(FXGIF_Context* ctx, + int* frame_num) { if (setjmp(ctx->gif_ptr->jmpbuf)) - return 0; + return GifDecodeStatus::Error; - int32_t ret = gif_get_frame(ctx->gif_ptr); - if (ret != 1) + GifDecodeStatus ret = gif_get_frame(ctx->gif_ptr); + if (ret != GifDecodeStatus::Success) return ret; *frame_num = gif_get_frame_num(ctx->gif_ptr); - return 1; + return GifDecodeStatus::Success; } -int32_t CCodec_GifModule::LoadFrame(FXGIF_Context* ctx, - int frame_num, - CFX_DIBAttribute* pAttribute) { +GifDecodeStatus CCodec_GifModule::LoadFrame(FXGIF_Context* ctx, + int frame_num, + CFX_DIBAttribute* pAttribute) { if (setjmp(ctx->gif_ptr->jmpbuf)) - return 0; + return GifDecodeStatus::Error; - int32_t ret = gif_load_frame(ctx->gif_ptr, frame_num); - if (ret == 1) { + GifDecodeStatus ret = gif_load_frame(ctx->gif_ptr, frame_num); + if (ret == GifDecodeStatus::Success) { if (pAttribute) { pAttribute->m_nGifLeft = (*ctx->gif_ptr->img_ptr_arr_ptr)[frame_num]->image_info_ptr->left; diff --git a/core/fxcodec/codec/ccodec_gifmodule.h b/core/fxcodec/codec/ccodec_gifmodule.h index 745f48a174..b42a86642b 100644 --- a/core/fxcodec/codec/ccodec_gifmodule.h +++ b/core/fxcodec/codec/ccodec_gifmodule.h @@ -7,6 +7,7 @@ #ifndef CORE_FXCODEC_CODEC_CCODEC_GIFMODULE_H_ #define CORE_FXCODEC_CODEC_CCODEC_GIFMODULE_H_ +#include "core/fxcodec/lgif/fx_gif.h" #include "core/fxcrt/fx_coordinates.h" #include "core/fxcrt/fx_system.h" @@ -44,18 +45,18 @@ class CCodec_GifModule { const uint8_t* src_buf, uint32_t src_size); - int32_t ReadHeader(FXGIF_Context* pContext, - int* width, - int* height, - int* pal_num, - void** pal_pp, - int* bg_index, - CFX_DIBAttribute* pAttribute); + GifDecodeStatus ReadHeader(FXGIF_Context* pContext, + int* width, + int* height, + int* pal_num, + void** pal_pp, + int* bg_index, + CFX_DIBAttribute* pAttribute); - int32_t LoadFrameInfo(FXGIF_Context* pContext, int* frame_num); - int32_t LoadFrame(FXGIF_Context* pContext, - int frame_num, - CFX_DIBAttribute* pAttribute); + GifDecodeStatus LoadFrameInfo(FXGIF_Context* pContext, int* frame_num); + GifDecodeStatus LoadFrame(FXGIF_Context* pContext, + int frame_num, + CFX_DIBAttribute* pAttribute); Delegate* GetDelegate() const { return m_pDelegate; } void SetDelegate(Delegate* pDelegate) { m_pDelegate = pDelegate; } diff --git a/core/fxcodec/codec/fx_codec_progress.cpp b/core/fxcodec/codec/fx_codec_progress.cpp index 6a95805dbe..9d710e582d 100644 --- a/core/fxcodec/codec/fx_codec_progress.cpp +++ b/core/fxcodec/codec/fx_codec_progress.cpp @@ -1194,10 +1194,10 @@ bool CCodec_ProgressiveDecoder::DetectImageType(FXCODEC_IMAGE_TYPE imageType, m_offSet += size; pGifModule->Input(m_pGifContext, m_pSrcBuf, size); m_SrcComponents = 1; - int32_t readResult = pGifModule->ReadHeader( + GifDecodeStatus readResult = pGifModule->ReadHeader( m_pGifContext, &m_SrcWidth, &m_SrcHeight, &m_GifPltNumber, (void**)&m_pGifPalette, &m_GifBgIndex, nullptr); - while (readResult == 2) { + while (readResult == GifDecodeStatus::Unfinished) { FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_FORMAT; if (!GifReadMoreData(pGifModule, error_status)) { m_status = error_status; @@ -1207,7 +1207,7 @@ bool CCodec_ProgressiveDecoder::DetectImageType(FXCODEC_IMAGE_TYPE imageType, m_pGifContext, &m_SrcWidth, &m_SrcHeight, &m_GifPltNumber, (void**)&m_pGifPalette, &m_GifBgIndex, nullptr); } - if (readResult == 1) { + if (readResult == GifDecodeStatus::Success) { m_SrcBPC = 8; m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight); return true; @@ -1805,9 +1805,9 @@ FXCODEC_STATUS CCodec_ProgressiveDecoder::GetFrames(int32_t& frames, return m_status; } while (true) { - int32_t readResult = + GifDecodeStatus readResult = pGifModule->LoadFrameInfo(m_pGifContext, &m_FrameNumber); - while (readResult == 2) { + while (readResult == GifDecodeStatus::Unfinished) { FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_READ; if (!GifReadMoreData(pGifModule, error_status)) { return error_status; @@ -1818,7 +1818,7 @@ FXCODEC_STATUS CCodec_ProgressiveDecoder::GetFrames(int32_t& frames, } readResult = pGifModule->LoadFrameInfo(m_pGifContext, &m_FrameNumber); } - if (readResult == 1) { + if (readResult == GifDecodeStatus::Success) { frames = m_FrameNumber; m_status = FXCODEC_STATUS_DECODE_READY; return m_status; @@ -2135,9 +2135,9 @@ FXCODEC_STATUS CCodec_ProgressiveDecoder::ContinueDecode(IFX_Pause* pPause) { return m_status; } while (true) { - int32_t readRes = + GifDecodeStatus readRes = pGifModule->LoadFrame(m_pGifContext, m_FrameCur, nullptr); - while (readRes == 2) { + while (readRes == GifDecodeStatus::Unfinished) { FXCODEC_STATUS error_status = FXCODEC_STATUS_DECODE_FINISH; if (!GifReadMoreData(pGifModule, error_status)) { m_pDeviceBitmap = nullptr; @@ -2151,7 +2151,7 @@ FXCODEC_STATUS CCodec_ProgressiveDecoder::ContinueDecode(IFX_Pause* pPause) { } readRes = pGifModule->LoadFrame(m_pGifContext, m_FrameCur, nullptr); } - if (readRes == 1) { + if (readRes == GifDecodeStatus::Success) { m_pDeviceBitmap = nullptr; m_pFile = nullptr; m_status = FXCODEC_STATUS_DECODE_FINISH; diff --git a/core/fxcodec/lgif/fx_gif.cpp b/core/fxcodec/lgif/fx_gif.cpp index 82d1bdd35e..307834d867 100644 --- a/core/fxcodec/lgif/fx_gif.cpp +++ b/core/fxcodec/lgif/fx_gif.cpp @@ -6,9 +6,19 @@ #include "core/fxcodec/lgif/fx_gif.h" +#include <utility> + #include "core/fxcodec/lbmp/fx_bmp.h" #include "third_party/base/stl_util.h" +static_assert(sizeof(GifImageInfo) == 9, + "GifImageInfo should have a size of 9"); +static_assert(sizeof(GifPalette) == 3, "GifPalette should have a size of 3"); +static_assert(sizeof(GifPTE) == 13, "GifPTE should have a size of 13"); +static_assert(sizeof(GifGCE) == 5, "GifGCE should have a size of 5"); +static_assert(sizeof(GifHeader) == 6, "GifHeader should have a size of 6"); +static_assert(sizeof(GifLSD) == 7, "GifLSD should have a size of 7"); + namespace { void gif_error(gif_decompress_struct_p gif_ptr, const char* err_msg) { @@ -21,10 +31,8 @@ void gif_warn(gif_decompress_struct_p gif_ptr, const char* err_msg) {} void gif_takeover_gce_ptr(gif_decompress_struct_p gif_ptr, GifGCE** gce_ptr_ptr) { *gce_ptr_ptr = nullptr; - if (gif_ptr->gce_ptr && gce_ptr_ptr) { - *gce_ptr_ptr = gif_ptr->gce_ptr; - gif_ptr->gce_ptr = nullptr; - } + if (gif_ptr->gce_ptr) + std::swap(*gce_ptr_ptr, gif_ptr->gce_ptr); } uint8_t* gif_read_data(gif_decompress_struct_p gif_ptr, @@ -45,7 +53,7 @@ void gif_save_decoding_status(gif_decompress_struct_p gif_ptr, int32_t status) { gif_ptr->skip_size = 0; } -int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr) { +GifDecodeStatus gif_decode_extension(gif_decompress_struct_p gif_ptr) { uint8_t* data_size_ptr = nullptr; uint8_t* data_ptr = nullptr; uint32_t skip_size_org = gif_ptr->skip_size; @@ -53,7 +61,7 @@ int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr) { case GIF_D_STATUS_EXT_CE: { if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) { gif_ptr->skip_size = skip_size_org; - return 2; + return GifDecodeStatus::Unfinished; } gif_ptr->cmt_data_ptr->clear(); while (*data_size_ptr != GIF_BLOCK_TERMINAL) { @@ -61,17 +69,16 @@ int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr) { if (!gif_read_data(gif_ptr, &data_ptr, *data_size_ptr) || !gif_read_data(gif_ptr, &data_size_ptr, 1)) { gif_ptr->skip_size = skip_size_org; - return 2; + return GifDecodeStatus::Unfinished; } *(gif_ptr->cmt_data_ptr) += CFX_ByteString((const char*)data_ptr, data_size); } } break; case GIF_D_STATUS_EXT_PTE: { - ASSERT(sizeof(GifPTE) == 13); GifPTE* gif_pte_ptr = nullptr; if (!gif_read_data(gif_ptr, (uint8_t**)&gif_pte_ptr, 13)) - return 2; + return GifDecodeStatus::Unfinished; GifPlainText* gif_pt_ptr = FX_Alloc(GifPlainText, 1); memset(gif_pt_ptr, 0, sizeof(GifPlainText)); @@ -99,7 +106,7 @@ int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr) { delete gif_pt_ptr->string_ptr; FX_Free(gif_pt_ptr); } - return 2; + return GifDecodeStatus::Unfinished; } while (*data_size_ptr != GIF_BLOCK_TERMINAL) { uint8_t data_size = *data_size_ptr; @@ -112,7 +119,7 @@ int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr) { delete gif_pt_ptr->string_ptr; FX_Free(gif_pt_ptr); } - return 2; + return GifDecodeStatus::Unfinished; } *(gif_pt_ptr->string_ptr) += CFX_ByteString((const char*)data_ptr, data_size); @@ -120,10 +127,9 @@ int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr) { gif_ptr->pt_ptr_arr_ptr->push_back(gif_pt_ptr); } break; case GIF_D_STATUS_EXT_GCE: { - ASSERT(sizeof(GifGCE) == 5); GifGCE* gif_gce_ptr = nullptr; if (!gif_read_data(gif_ptr, (uint8_t**)&gif_gce_ptr, 6)) - return 2; + return GifDecodeStatus::Unfinished; if (!gif_ptr->gce_ptr) gif_ptr->gce_ptr = FX_Alloc(GifGCE, 1); @@ -139,31 +145,30 @@ int32_t gif_decode_extension(gif_decompress_struct_p gif_ptr) { gif_ptr->gce_ptr = nullptr; } if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) - return 2; + 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; - return 2; + return GifDecodeStatus::Unfinished; } } } } gif_save_decoding_status(gif_ptr, GIF_D_STATUS_SIG); - return 1; + return GifDecodeStatus::Success; } -int32_t gif_decode_image_info(gif_decompress_struct_p gif_ptr) { +GifDecodeStatus 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; + return GifDecodeStatus::Error; } uint32_t skip_size_org = gif_ptr->skip_size; - ASSERT(sizeof(GifImageInfo) == 9); GifImageInfo* gif_img_info_ptr = nullptr; if (!gif_read_data(gif_ptr, (uint8_t**)&gif_img_info_ptr, 9)) - return 2; + return GifDecodeStatus::Unfinished; GifImage* gif_image_ptr = FX_Alloc(GifImage, 1); memset(gif_image_ptr, 0, sizeof(GifImage)); @@ -187,11 +192,10 @@ int32_t gif_decode_image_info(gif_decompress_struct_p gif_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; + return GifDecodeStatus::Error; } GifLF* gif_img_info_lf_ptr = (GifLF*)&gif_img_info_ptr->local_flag; if (gif_img_info_lf_ptr->local_pal) { - ASSERT(sizeof(GifPalette) == 3); int32_t loc_pal_size = (2 << gif_img_info_lf_ptr->pal_bits) * 3; uint8_t* loc_pal_ptr = nullptr; if (!gif_read_data(gif_ptr, &loc_pal_ptr, loc_pal_size)) { @@ -199,7 +203,7 @@ int32_t gif_decode_image_info(gif_decompress_struct_p gif_ptr) { FX_Free(gif_image_ptr->image_info_ptr); FX_Free(gif_image_ptr->image_row_buf); FX_Free(gif_image_ptr); - return 2; + return GifDecodeStatus::Unfinished; } gif_image_ptr->local_pal_ptr = (GifPalette*)gif_ptr->gif_ask_buf_for_pal_fn(gif_ptr, loc_pal_size); @@ -214,7 +218,7 @@ int32_t gif_decode_image_info(gif_decompress_struct_p gif_ptr) { FX_Free(gif_image_ptr->local_pal_ptr); FX_Free(gif_image_ptr->image_row_buf); FX_Free(gif_image_ptr); - return 2; + return GifDecodeStatus::Unfinished; } gif_image_ptr->image_code_size = *code_size_ptr; gif_ptr->gif_record_current_position_fn(gif_ptr, @@ -223,7 +227,7 @@ int32_t gif_decode_image_info(gif_decompress_struct_p gif_ptr) { gif_takeover_gce_ptr(gif_ptr, &gif_image_ptr->image_gce_ptr); gif_ptr->img_ptr_arr_ptr->push_back(gif_image_ptr); gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); - return 1; + return GifDecodeStatus::Success; } void gif_decoding_failure_at_tail_cleanup(gif_decompress_struct_p gif_ptr, @@ -311,16 +315,16 @@ void CGifLZWDecoder::AddCode(uint16_t prefix_code, uint8_t append_char) { } } -int32_t CGifLZWDecoder::Decode(uint8_t* des_buf, uint32_t* des_size) { +GifDecodeStatus CGifLZWDecoder::Decode(uint8_t* des_buf, uint32_t* des_size) { if (*des_size == 0) - return 3; + return GifDecodeStatus::InsufficientDestSize; uint32_t i = 0; if (stack_size != 0) { if (*des_size < stack_size) { memcpy(des_buf, &stack[GIF_MAX_LZW_CODE - stack_size], *des_size); stack_size -= static_cast<uint16_t>(*des_size); - return 3; + return GifDecodeStatus::InsufficientDestSize; } memcpy(des_buf, &stack[GIF_MAX_LZW_CODE - stack_size], stack_size); des_buf += stack_size; @@ -331,19 +335,19 @@ int32_t CGifLZWDecoder::Decode(uint8_t* des_buf, uint32_t* des_size) { while (i <= *des_size && (avail_in > 0 || bits_left >= code_size_cur)) { if (code_size_cur > 12) { strncpy(err_msg_ptr, "Code Length Out Of Range", GIF_MAX_ERROR_SIZE - 1); - return 0; + return GifDecodeStatus::Error; } if (avail_in > 0) { if (bits_left > 31) { strncpy(err_msg_ptr, "Decode Error", GIF_MAX_ERROR_SIZE - 1); - return 0; + return GifDecodeStatus::Error; } pdfium::base::CheckedNumeric<uint32_t> safe_code = *next_in++; safe_code <<= bits_left; safe_code |= code_store; if (!safe_code.IsValid()) { strncpy(err_msg_ptr, "Code Store Out Of Range", GIF_MAX_ERROR_SIZE - 1); - return 0; + return GifDecodeStatus::Error; } code_store = safe_code.ValueOrDie(); --avail_in; @@ -360,7 +364,7 @@ int32_t CGifLZWDecoder::Decode(uint8_t* des_buf, uint32_t* des_size) { } if (code == code_end) { *des_size = i; - return 1; + return GifDecodeStatus::Success; } if (code_old != static_cast<uint16_t>(-1)) { if (code_next < GIF_MAX_LZW_CODE) { @@ -370,7 +374,7 @@ int32_t CGifLZWDecoder::Decode(uint8_t* des_buf, uint32_t* des_size) { } else if (code > code_next) { strncpy(err_msg_ptr, "Decode Error, Out Of Range", GIF_MAX_ERROR_SIZE - 1); - return 0; + return GifDecodeStatus::Error; } else { DecodeString(code); uint8_t append_char = stack[GIF_MAX_LZW_CODE - stack_size]; @@ -384,7 +388,7 @@ int32_t CGifLZWDecoder::Decode(uint8_t* des_buf, uint32_t* des_size) { if (i + stack_size > *des_size) { memcpy(des_buf, &stack[GIF_MAX_LZW_CODE - stack_size], *des_size - i); stack_size -= static_cast<uint16_t>(*des_size - i); - return 3; + return GifDecodeStatus::InsufficientDestSize; } memcpy(des_buf, &stack[GIF_MAX_LZW_CODE - stack_size], stack_size); des_buf += stack_size; @@ -394,9 +398,9 @@ int32_t CGifLZWDecoder::Decode(uint8_t* des_buf, uint32_t* des_size) { } if (avail_in == 0) { *des_size = i; - return 2; + return GifDecodeStatus::Unfinished; } - return 0; + return GifDecodeStatus::Error; } gif_decompress_struct_p gif_create_decompress() { @@ -448,36 +452,33 @@ void gif_destroy_decompress(gif_decompress_struct_pp gif_ptr_ptr) { FX_Free(gif_ptr); } -int32_t gif_read_header(gif_decompress_struct_p gif_ptr) { +GifDecodeStatus gif_read_header(gif_decompress_struct_p gif_ptr) { if (!gif_ptr) - return 0; + return GifDecodeStatus::Error; uint32_t skip_size_org = gif_ptr->skip_size; - ASSERT(sizeof(GifHeader) == 6); GifHeader* gif_header_ptr = nullptr; if (!gif_read_data(gif_ptr, reinterpret_cast<uint8_t**>(&gif_header_ptr), 6)) - return 2; + 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_error(gif_ptr, "Not A Gif Image"); - return 0; + return GifDecodeStatus::Error; } - ASSERT(sizeof(GifLSD) == 7); GifLSD* gif_lsd_ptr = nullptr; if (!gif_read_data(gif_ptr, reinterpret_cast<uint8_t**>(&gif_lsd_ptr), 7)) { gif_ptr->skip_size = skip_size_org; - return 2; + return GifDecodeStatus::Unfinished; } if (reinterpret_cast<GifGF*>(&gif_lsd_ptr->global_flag)->global_pal) { gif_ptr->global_pal_num = 2 << reinterpret_cast<GifGF*>(&gif_lsd_ptr->global_flag)->pal_bits; - ASSERT(sizeof(GifPalette) == 3); int32_t global_pal_size = gif_ptr->global_pal_num * 3; uint8_t* global_pal_ptr = nullptr; if (!gif_read_data(gif_ptr, &global_pal_ptr, global_pal_size)) { gif_ptr->skip_size = skip_size_org; - return 2; + return GifDecodeStatus::Unfinished; } gif_ptr->global_sort_flag = ((GifGF*)&gif_lsd_ptr->global_flag)->sort_flag; gif_ptr->global_color_resolution = @@ -490,22 +491,22 @@ int32_t gif_read_header(gif_decompress_struct_p gif_ptr) { 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; + return GifDecodeStatus::Success; } -int32_t gif_get_frame(gif_decompress_struct_p gif_ptr) { +GifDecodeStatus gif_get_frame(gif_decompress_struct_p gif_ptr) { if (!gif_ptr) - return 0; + return GifDecodeStatus::Error; - int32_t ret = 1; + GifDecodeStatus ret = GifDecodeStatus::Success; while (true) { switch (gif_ptr->decode_status) { case GIF_D_STATUS_TAIL: - return 1; + return GifDecodeStatus::Success; case GIF_D_STATUS_SIG: { uint8_t* sig_ptr = nullptr; if (!gif_read_data(gif_ptr, &sig_ptr, 1)) - return 2; + return GifDecodeStatus::Unfinished; switch (*sig_ptr) { case GIF_SIG_EXTENSION: @@ -516,7 +517,7 @@ int32_t gif_get_frame(gif_decompress_struct_p gif_ptr) { continue; case GIF_SIG_TRAILER: gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); - return 1; + return GifDecodeStatus::Success; default: if (gif_ptr->avail_in) { gif_warn(gif_ptr, "The Gif File has non_standard Tag!"); @@ -524,13 +525,13 @@ int32_t gif_get_frame(gif_decompress_struct_p gif_ptr) { continue; } gif_warn(gif_ptr, "The Gif File Doesn't have Trailer Tag!"); - return 1; + return GifDecodeStatus::Success; } } case GIF_D_STATUS_EXT: { uint8_t* ext_ptr = nullptr; if (!gif_read_data(gif_ptr, &ext_ptr, 1)) - return 2; + return GifDecodeStatus::Unfinished; switch (*ext_ptr) { case GIF_BLOCK_CE: @@ -554,9 +555,8 @@ int32_t gif_get_frame(gif_decompress_struct_p gif_ptr) { } case GIF_D_STATUS_IMG_INFO: { ret = gif_decode_image_info(gif_ptr); - if (ret != 1) { + if (ret != GifDecodeStatus::Success) return ret; - } continue; } case GIF_D_STATUS_IMG_DATA: { @@ -564,35 +564,36 @@ int32_t gif_get_frame(gif_decompress_struct_p gif_ptr) { uint8_t* data_ptr = nullptr; uint32_t skip_size_org = gif_ptr->skip_size; if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) - return 2; + 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; - return 2; + 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)) - return 2; + return GifDecodeStatus::Unfinished; } gif_save_decoding_status(gif_ptr, GIF_D_STATUS_SIG); continue; } default: { ret = gif_decode_extension(gif_ptr); - if (ret != 1) + if (ret != GifDecodeStatus::Success) return ret; break; } } } - return 1; + return GifDecodeStatus::Success; } -int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { +GifDecodeStatus gif_load_frame(gif_decompress_struct_p gif_ptr, + int32_t frame_num) { if (!gif_ptr || !pdfium::IndexInBounds(*gif_ptr->img_ptr_arr_ptr, frame_num)) - return 0; + return GifDecodeStatus::Error; uint8_t* data_size_ptr = nullptr; uint8_t* data_ptr = nullptr; @@ -601,7 +602,7 @@ int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { uint32_t gif_img_row_bytes = gif_image_ptr->image_info_ptr->width; if (gif_img_row_bytes == 0) { gif_error(gif_ptr, "Error Invalid Number of Row Bytes"); - return 0; + return GifDecodeStatus::Error; } if (gif_ptr->decode_status == GIF_D_STATUS_TAIL) { if (gif_image_ptr->image_row_buf) { @@ -630,7 +631,7 @@ int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { FX_Free(gif_image_ptr->image_row_buf); gif_image_ptr->image_row_buf = nullptr; gif_error(gif_ptr, "Error Read Record Position Data"); - return 0; + return GifDecodeStatus::Error; } } else { bool bRes = gif_ptr->gif_get_record_position_fn( @@ -653,14 +654,14 @@ int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { FX_Free(gif_image_ptr->image_row_buf); gif_image_ptr->image_row_buf = nullptr; gif_error(gif_ptr, "Error Read Record Position Data"); - return 0; + return GifDecodeStatus::Error; } } if (gif_image_ptr->image_code_size >= 32) { FX_Free(gif_image_ptr->image_row_buf); gif_image_ptr->image_row_buf = nullptr; gif_error(gif_ptr, "Error Invalid Code Size"); - return 0; + return GifDecodeStatus::Error; } if (!gif_ptr->img_decoder_ptr) gif_ptr->img_decoder_ptr = new CGifLZWDecoder(gif_ptr->err_ptr); @@ -674,43 +675,43 @@ int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { CGifLZWDecoder* img_decoder_ptr = gif_ptr->img_decoder_ptr; if (gif_ptr->decode_status == GIF_D_STATUS_IMG_DATA) { if (!gif_read_data(gif_ptr, &data_size_ptr, 1)) - return 2; + 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; - return 2; + 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; - int32_t ret = img_decoder_ptr->Decode( + GifDecodeStatus 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) { + if (ret == GifDecodeStatus::Error) { gif_decoding_failure_at_tail_cleanup(gif_ptr, gif_image_ptr); - return 0; + return GifDecodeStatus::Error; } - while (ret != 0) { - if (ret == 1) { + while (ret != GifDecodeStatus::Error) { + if (ret == GifDecodeStatus::Success) { gif_ptr->gif_get_row_fn(gif_ptr, gif_image_ptr->image_row_num, gif_image_ptr->image_row_buf); FX_Free(gif_image_ptr->image_row_buf); gif_image_ptr->image_row_buf = nullptr; gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); - return 1; + return GifDecodeStatus::Success; } - if (ret == 2) { + 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)) - return 2; + 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; - return 2; + return GifDecodeStatus::Unfinished; } img_decoder_ptr->Input(data_ptr, *data_size_ptr); gif_save_decoding_status(gif_ptr, GIF_D_STATUS_IMG_DATA); @@ -722,7 +723,7 @@ int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { &gif_ptr->img_row_avail_size); } } - if (ret == 3) { + if (ret == GifDecodeStatus::InsufficientDestSize) { 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); @@ -733,7 +734,7 @@ int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { 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); - return 0; + return GifDecodeStatus::Error; } gif_image_ptr->image_row_num = s_gif_interlace_step[gif_ptr->img_pass_num] / 2; @@ -748,16 +749,16 @@ int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num) { gif_image_ptr->image_row_buf + gif_ptr->img_row_offset, &gif_ptr->img_row_avail_size); } - if (ret == 0) { + if (ret == GifDecodeStatus::Error) { gif_decoding_failure_at_tail_cleanup(gif_ptr, gif_image_ptr); - return 0; + return GifDecodeStatus::Error; } } } gif_save_decoding_status(gif_ptr, GIF_D_STATUS_TAIL); } gif_error(gif_ptr, "Decode Image Data Error"); - return 0; + return GifDecodeStatus::Error; } void gif_input_buffer(gif_decompress_struct_p gif_ptr, diff --git a/core/fxcodec/lgif/fx_gif.h b/core/fxcodec/lgif/fx_gif.h index a77a8a3065..c83368479c 100644 --- a/core/fxcodec/lgif/fx_gif.h +++ b/core/fxcodec/lgif/fx_gif.h @@ -115,6 +115,13 @@ typedef struct tagGifPlainText { CFX_ByteString* string_ptr; } GifPlainText; +enum class GifDecodeStatus { + Error, + Success, + Unfinished, + InsufficientDestSize, // Only used internally by CGifLZWDecoder::Decode() +}; + class CGifLZWDecoder { public: struct tag_Table { @@ -126,7 +133,7 @@ class CGifLZWDecoder { ~CGifLZWDecoder(); void InitTable(uint8_t code_len); - int32_t Decode(uint8_t* des_buf, uint32_t* des_size); + GifDecodeStatus Decode(uint8_t* des_buf, uint32_t* des_size); void Input(uint8_t* src_buf, uint32_t src_size); uint32_t GetAvailInput(); @@ -209,10 +216,11 @@ struct tag_gif_decompress_struct { gif_decompress_struct_p gif_create_decompress(); void gif_destroy_decompress(gif_decompress_struct_pp gif_ptr_ptr); -int32_t gif_read_header(gif_decompress_struct_p gif_ptr); -int32_t gif_get_frame(gif_decompress_struct_p gif_ptr); +GifDecodeStatus gif_read_header(gif_decompress_struct_p gif_ptr); +GifDecodeStatus gif_get_frame(gif_decompress_struct_p gif_ptr); int32_t gif_get_frame_num(gif_decompress_struct_p gif_ptr); -int32_t gif_load_frame(gif_decompress_struct_p gif_ptr, int32_t frame_num); +GifDecodeStatus gif_load_frame(gif_decompress_struct_p gif_ptr, + int32_t frame_num); void gif_input_buffer(gif_decompress_struct_p gif_ptr, uint8_t* src_buf, uint32_t src_size); |