// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fxcodec/codec/codec_int.h"
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#include "core/fxcodec/include/fx_codec.h"
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#include "core/fxcodec/lbmp/fx_bmp.h"
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#include "core/fxge/include/fx_dib.h"
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struct FXBMP_Context {
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bmp_decompress_struct_p bmp_ptr;
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void* parent_ptr;
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void* child_ptr;
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void* (*m_AllocFunc)(unsigned int);
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void (*m_FreeFunc)(void*);
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};
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extern "C" {
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static void* bmp_alloc_func(unsigned int size) {
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return FX_Alloc(char, size);
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}
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static void bmp_free_func(void* p) {
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FX_Free(p);
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}
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};
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static void bmp_error_data(bmp_decompress_struct_p bmp_ptr,
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const FX_CHAR* err_msg) {
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FXSYS_strncpy((char*)bmp_ptr->err_ptr, err_msg, BMP_MAX_ERROR_SIZE - 1);
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longjmp(bmp_ptr->jmpbuf, 1);
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}
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static void bmp_read_scanline(bmp_decompress_struct_p bmp_ptr,
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int32_t row_num,
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uint8_t* row_buf) {
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FXBMP_Context* p = (FXBMP_Context*)bmp_ptr->context_ptr;
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CCodec_BmpModule* pModule = (CCodec_BmpModule*)p->parent_ptr;
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pModule->ReadScanlineCallback(p->child_ptr, row_num, row_buf);
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}
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static FX_BOOL bmp_get_data_position(bmp_decompress_struct_p bmp_ptr,
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uint32_t rcd_pos) {
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FXBMP_Context* p = (FXBMP_Context*)bmp_ptr->context_ptr;
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CCodec_BmpModule* pModule = (CCodec_BmpModule*)p->parent_ptr;
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return pModule->InputImagePositionBufCallback(p->child_ptr, rcd_pos);
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}
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FXBMP_Context* CCodec_BmpModule::Start(void* pModule) {
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FXBMP_Context* p = FX_Alloc(FXBMP_Context, 1);
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if (!p)
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return nullptr;
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FXSYS_memset(p, 0, sizeof(FXBMP_Context));
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if (!p)
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return nullptr;
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p->m_AllocFunc = bmp_alloc_func;
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p->m_FreeFunc = bmp_free_func;
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p->bmp_ptr = nullptr;
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p->parent_ptr = (void*)this;
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p->child_ptr = pModule;
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p->bmp_ptr = bmp_create_decompress();
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if (!p->bmp_ptr) {
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FX_Free(p);
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return nullptr;
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}
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p->bmp_ptr->context_ptr = (void*)p;
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p->bmp_ptr->err_ptr = m_szLastError;
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p->bmp_ptr->bmp_error_fn = bmp_error_data;
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p->bmp_ptr->bmp_get_row_fn = bmp_read_scanline;
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p->bmp_ptr->bmp_get_data_position_fn = bmp_get_data_position;
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return p;
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}
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void CCodec_BmpModule::Finish(FXBMP_Context* ctx) {
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if (ctx) {
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bmp_destroy_decompress(&ctx->bmp_ptr);
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ctx->m_FreeFunc(ctx);
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}
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}
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int32_t CCodec_BmpModule::ReadHeader(FXBMP_Context* ctx,
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int32_t* width,
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int32_t* height,
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FX_BOOL* tb_flag,
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int32_t* components,
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int32_t* pal_num,
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uint32_t** pal_pp,
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CFX_DIBAttribute* pAttribute) {
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if (setjmp(ctx->bmp_ptr->jmpbuf)) {
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return 0;
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}
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int32_t ret = bmp_read_header(ctx->bmp_ptr);
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if (ret != 1) {
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return ret;
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}
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*width = ctx->bmp_ptr->width;
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*height = ctx->bmp_ptr->height;
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*tb_flag = ctx->bmp_ptr->imgTB_flag;
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*components = ctx->bmp_ptr->components;
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*pal_num = ctx->bmp_ptr->pal_num;
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*pal_pp = ctx->bmp_ptr->pal_ptr;
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if (pAttribute) {
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pAttribute->m_wDPIUnit = FXCODEC_RESUNIT_METER;
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pAttribute->m_nXDPI = ctx->bmp_ptr->dpi_x;
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pAttribute->m_nYDPI = ctx->bmp_ptr->dpi_y;
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pAttribute->m_nBmpCompressType = ctx->bmp_ptr->compress_flag;
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}
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return 1;
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}
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int32_t CCodec_BmpModule::LoadImage(FXBMP_Context* ctx) {
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if (setjmp(ctx->bmp_ptr->jmpbuf))
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return 0;
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return bmp_decode_image(ctx->bmp_ptr);
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}
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uint32_t CCodec_BmpModule::GetAvailInput(FXBMP_Context* ctx,
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uint8_t** avail_buf_ptr) {
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return bmp_get_avail_input(ctx->bmp_ptr, avail_buf_ptr);
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}
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void CCodec_BmpModule::Input(FXBMP_Context* ctx,
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const uint8_t* src_buf,
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uint32_t src_size) {
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bmp_input_buffer(ctx->bmp_ptr, (uint8_t*)src_buf, src_size);
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}
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