| // 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/codec/codec_int.h" |
| #include "core/fxcodec/fx_codec.h" |
| #include "core/fxcodec/lbmp/fx_bmp.h" |
| #include "core/fxge/fx_dib.h" |
| struct FXBMP_Context { |
| bmp_decompress_struct_p bmp_ptr; |
| void* parent_ptr; |
| void* child_ptr; |
| |
| void* (*m_AllocFunc)(unsigned int); |
| void (*m_FreeFunc)(void*); |
| }; |
| extern "C" { |
| static void* bmp_alloc_func(unsigned int size) { |
| return FX_Alloc(char, size); |
| } |
| static void bmp_free_func(void* p) { |
| FX_Free(p); |
| } |
| }; |
| static void bmp_error_data(bmp_decompress_struct_p bmp_ptr, |
| const FX_CHAR* err_msg) { |
| FXSYS_strncpy((char*)bmp_ptr->err_ptr, err_msg, BMP_MAX_ERROR_SIZE - 1); |
| longjmp(bmp_ptr->jmpbuf, 1); |
| } |
| static void bmp_read_scanline(bmp_decompress_struct_p bmp_ptr, |
| int32_t row_num, |
| uint8_t* row_buf) { |
| FXBMP_Context* p = (FXBMP_Context*)bmp_ptr->context_ptr; |
| CCodec_BmpModule* pModule = (CCodec_BmpModule*)p->parent_ptr; |
| pModule->ReadScanlineCallback(p->child_ptr, row_num, row_buf); |
| } |
| static FX_BOOL bmp_get_data_position(bmp_decompress_struct_p bmp_ptr, |
| uint32_t rcd_pos) { |
| FXBMP_Context* p = (FXBMP_Context*)bmp_ptr->context_ptr; |
| CCodec_BmpModule* pModule = (CCodec_BmpModule*)p->parent_ptr; |
| return pModule->InputImagePositionBufCallback(p->child_ptr, rcd_pos); |
| } |
| |
| FXBMP_Context* CCodec_BmpModule::Start(void* pModule) { |
| FXBMP_Context* p = FX_Alloc(FXBMP_Context, 1); |
| if (!p) |
| return nullptr; |
| |
| FXSYS_memset(p, 0, sizeof(FXBMP_Context)); |
| if (!p) |
| return nullptr; |
| |
| p->m_AllocFunc = bmp_alloc_func; |
| p->m_FreeFunc = bmp_free_func; |
| p->bmp_ptr = nullptr; |
| p->parent_ptr = (void*)this; |
| p->child_ptr = pModule; |
| p->bmp_ptr = bmp_create_decompress(); |
| if (!p->bmp_ptr) { |
| FX_Free(p); |
| return nullptr; |
| } |
| p->bmp_ptr->context_ptr = (void*)p; |
| p->bmp_ptr->err_ptr = m_szLastError; |
| p->bmp_ptr->bmp_error_fn = bmp_error_data; |
| p->bmp_ptr->bmp_get_row_fn = bmp_read_scanline; |
| p->bmp_ptr->bmp_get_data_position_fn = bmp_get_data_position; |
| return p; |
| } |
| |
| void CCodec_BmpModule::Finish(FXBMP_Context* ctx) { |
| if (ctx) { |
| bmp_destroy_decompress(&ctx->bmp_ptr); |
| ctx->m_FreeFunc(ctx); |
| } |
| } |
| int32_t CCodec_BmpModule::ReadHeader(FXBMP_Context* ctx, |
| int32_t* width, |
| int32_t* height, |
| FX_BOOL* tb_flag, |
| int32_t* components, |
| int32_t* pal_num, |
| uint32_t** pal_pp, |
| CFX_DIBAttribute* pAttribute) { |
| if (setjmp(ctx->bmp_ptr->jmpbuf)) { |
| return 0; |
| } |
| int32_t ret = bmp_read_header(ctx->bmp_ptr); |
| if (ret != 1) { |
| return ret; |
| } |
| *width = ctx->bmp_ptr->width; |
| *height = ctx->bmp_ptr->height; |
| *tb_flag = ctx->bmp_ptr->imgTB_flag; |
| *components = ctx->bmp_ptr->components; |
| *pal_num = ctx->bmp_ptr->pal_num; |
| *pal_pp = ctx->bmp_ptr->pal_ptr; |
| if (pAttribute) { |
| pAttribute->m_wDPIUnit = FXCODEC_RESUNIT_METER; |
| pAttribute->m_nXDPI = ctx->bmp_ptr->dpi_x; |
| pAttribute->m_nYDPI = ctx->bmp_ptr->dpi_y; |
| pAttribute->m_nBmpCompressType = ctx->bmp_ptr->compress_flag; |
| } |
| return 1; |
| } |
| |
| int32_t CCodec_BmpModule::LoadImage(FXBMP_Context* ctx) { |
| if (setjmp(ctx->bmp_ptr->jmpbuf)) |
| return 0; |
| return bmp_decode_image(ctx->bmp_ptr); |
| } |
| |
| uint32_t CCodec_BmpModule::GetAvailInput(FXBMP_Context* ctx, |
| uint8_t** avail_buf_ptr) { |
| return bmp_get_avail_input(ctx->bmp_ptr, avail_buf_ptr); |
| } |
| |
| void CCodec_BmpModule::Input(FXBMP_Context* ctx, |
| const uint8_t* src_buf, |
| uint32_t src_size) { |
| bmp_input_buffer(ctx->bmp_ptr, (uint8_t*)src_buf, src_size); |
| } |