// 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 "public/fpdf_edit.h"
|
|
#include "core/fpdfapi/cpdf_modulemgr.h"
|
#include "core/fpdfapi/page/cpdf_image.h"
|
#include "core/fpdfapi/page/cpdf_imageobject.h"
|
#include "core/fpdfapi/page/cpdf_page.h"
|
#include "core/fpdfapi/page/cpdf_pageobject.h"
|
#include "core/fpdfapi/parser/cpdf_array.h"
|
#include "core/fpdfapi/parser/cpdf_name.h"
|
#include "core/fpdfapi/render/cpdf_dibsource.h"
|
#include "fpdfsdk/fsdk_define.h"
|
#include "third_party/base/ptr_util.h"
|
|
namespace {
|
|
// These checks ensure the consistency of colorspace values across core/ and
|
// public/.
|
static_assert(PDFCS_DEVICEGRAY == FPDF_COLORSPACE_DEVICEGRAY,
|
"PDFCS_DEVICEGRAY value mismatch");
|
static_assert(PDFCS_DEVICERGB == FPDF_COLORSPACE_DEVICERGB,
|
"PDFCS_DEVICERGB value mismatch");
|
static_assert(PDFCS_DEVICECMYK == FPDF_COLORSPACE_DEVICECMYK,
|
"PDFCS_DEVICECMYK value mismatch");
|
static_assert(PDFCS_CALGRAY == FPDF_COLORSPACE_CALGRAY,
|
"PDFCS_CALGRAY value mismatch");
|
static_assert(PDFCS_CALRGB == FPDF_COLORSPACE_CALRGB,
|
"PDFCS_CALRGB value mismatch");
|
static_assert(PDFCS_LAB == FPDF_COLORSPACE_LAB, "PDFCS_LAB value mismatch");
|
static_assert(PDFCS_ICCBASED == FPDF_COLORSPACE_ICCBASED,
|
"PDFCS_ICCBASED value mismatch");
|
static_assert(PDFCS_SEPARATION == FPDF_COLORSPACE_SEPARATION,
|
"PDFCS_SEPARATION value mismatch");
|
static_assert(PDFCS_DEVICEN == FPDF_COLORSPACE_DEVICEN,
|
"PDFCS_DEVICEN value mismatch");
|
static_assert(PDFCS_INDEXED == FPDF_COLORSPACE_INDEXED,
|
"PDFCS_INDEXED value mismatch");
|
static_assert(PDFCS_PATTERN == FPDF_COLORSPACE_PATTERN,
|
"PDFCS_PATTERN value mismatch");
|
|
bool LoadJpegHelper(FPDF_PAGE* pages,
|
int nCount,
|
FPDF_PAGEOBJECT image_object,
|
FPDF_FILEACCESS* fileAccess,
|
bool inlineJpeg) {
|
if (!image_object || !fileAccess)
|
return false;
|
|
RetainPtr<IFX_SeekableReadStream> pFile = MakeSeekableReadStream(fileAccess);
|
CPDF_ImageObject* pImgObj = static_cast<CPDF_ImageObject*>(image_object);
|
|
if (pages) {
|
for (int index = 0; index < nCount; index++) {
|
CPDF_Page* pPage = CPDFPageFromFPDFPage(pages[index]);
|
if (pPage)
|
pImgObj->GetImage()->ResetCache(pPage, nullptr);
|
}
|
}
|
|
if (inlineJpeg)
|
pImgObj->GetImage()->SetJpegImageInline(pFile);
|
else
|
pImgObj->GetImage()->SetJpegImage(pFile);
|
pImgObj->SetDirty(true);
|
return true;
|
}
|
|
} // namespace
|
|
FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV
|
FPDFPageObj_NewImageObj(FPDF_DOCUMENT document) {
|
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
|
if (!pDoc)
|
return nullptr;
|
|
auto pImageObj = pdfium::MakeUnique<CPDF_ImageObject>();
|
pImageObj->SetImage(pdfium::MakeRetain<CPDF_Image>(pDoc));
|
return pImageObj.release();
|
}
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
|
FPDFImageObj_LoadJpegFile(FPDF_PAGE* pages,
|
int nCount,
|
FPDF_PAGEOBJECT image_object,
|
FPDF_FILEACCESS* fileAccess) {
|
return LoadJpegHelper(pages, nCount, image_object, fileAccess, false);
|
}
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
|
FPDFImageObj_LoadJpegFileInline(FPDF_PAGE* pages,
|
int nCount,
|
FPDF_PAGEOBJECT image_object,
|
FPDF_FILEACCESS* fileAccess) {
|
return LoadJpegHelper(pages, nCount, image_object, fileAccess, true);
|
}
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
|
FPDFImageObj_SetMatrix(FPDF_PAGEOBJECT image_object,
|
double a,
|
double b,
|
double c,
|
double d,
|
double e,
|
double f) {
|
if (!image_object)
|
return false;
|
|
CPDF_ImageObject* pImgObj = static_cast<CPDF_ImageObject*>(image_object);
|
pImgObj->set_matrix(CFX_Matrix(static_cast<float>(a), static_cast<float>(b),
|
static_cast<float>(c), static_cast<float>(d),
|
static_cast<float>(e), static_cast<float>(f)));
|
pImgObj->CalcBoundingBox();
|
pImgObj->SetDirty(true);
|
return true;
|
}
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
|
FPDFImageObj_SetBitmap(FPDF_PAGE* pages,
|
int nCount,
|
FPDF_PAGEOBJECT image_object,
|
FPDF_BITMAP bitmap) {
|
if (!image_object || !bitmap || !pages)
|
return false;
|
|
CPDF_ImageObject* pImgObj = static_cast<CPDF_ImageObject*>(image_object);
|
for (int index = 0; index < nCount; index++) {
|
CPDF_Page* pPage = CPDFPageFromFPDFPage(pages[index]);
|
if (pPage)
|
pImgObj->GetImage()->ResetCache(pPage, nullptr);
|
}
|
RetainPtr<CFX_DIBitmap> holder(CFXBitmapFromFPDFBitmap(bitmap));
|
pImgObj->GetImage()->SetImage(holder);
|
pImgObj->CalcBoundingBox();
|
pImgObj->SetDirty(true);
|
return true;
|
}
|
|
FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV
|
FPDFImageObj_GetBitmap(FPDF_PAGEOBJECT image_object) {
|
CPDF_PageObject* pObj = CPDFPageObjectFromFPDFPageObject(image_object);
|
if (!pObj || !pObj->IsImage())
|
return nullptr;
|
|
RetainPtr<CPDF_Image> pImg = pObj->AsImage()->GetImage();
|
if (!pImg)
|
return nullptr;
|
|
RetainPtr<CFX_DIBSource> pSource = pImg->LoadDIBSource();
|
if (!pSource)
|
return nullptr;
|
|
RetainPtr<CFX_DIBitmap> pBitmap;
|
// If the source image has a representation of 1 bit per pixel, then convert
|
// it to a grayscale bitmap having 1 byte per pixel, since bitmaps have no
|
// concept of bits. Otherwise, convert the source image to a bitmap directly,
|
// retaining its color representation.
|
if (pSource->GetBPP() == 1)
|
pBitmap = pSource->CloneConvert(FXDIB_8bppRgb);
|
else
|
pBitmap = pSource->Clone(nullptr);
|
|
return pBitmap.Leak();
|
}
|
|
FPDF_EXPORT unsigned long FPDF_CALLCONV
|
FPDFImageObj_GetImageDataDecoded(FPDF_PAGEOBJECT image_object,
|
void* buffer,
|
unsigned long buflen) {
|
CPDF_PageObject* pObj = CPDFPageObjectFromFPDFPageObject(image_object);
|
if (!pObj || !pObj->IsImage())
|
return 0;
|
|
RetainPtr<CPDF_Image> pImg = pObj->AsImage()->GetImage();
|
if (!pImg)
|
return 0;
|
|
CPDF_Stream* pImgStream = pImg->GetStream();
|
if (!pImgStream)
|
return 0;
|
|
return DecodeStreamMaybeCopyAndReturnLength(pImgStream, buffer, buflen);
|
}
|
|
FPDF_EXPORT unsigned long FPDF_CALLCONV
|
FPDFImageObj_GetImageDataRaw(FPDF_PAGEOBJECT image_object,
|
void* buffer,
|
unsigned long buflen) {
|
CPDF_PageObject* pObj = CPDFPageObjectFromFPDFPageObject(image_object);
|
if (!pObj || !pObj->IsImage())
|
return 0;
|
|
RetainPtr<CPDF_Image> pImg = pObj->AsImage()->GetImage();
|
if (!pImg)
|
return 0;
|
|
CPDF_Stream* pImgStream = pImg->GetStream();
|
if (!pImgStream)
|
return 0;
|
|
uint32_t len = pImgStream->GetRawSize();
|
if (buffer && buflen >= len)
|
memcpy(buffer, pImgStream->GetRawData(), len);
|
|
return len;
|
}
|
|
FPDF_EXPORT int FPDF_CALLCONV
|
FPDFImageObj_GetImageFilterCount(FPDF_PAGEOBJECT image_object) {
|
CPDF_PageObject* pObj = CPDFPageObjectFromFPDFPageObject(image_object);
|
if (!pObj || !pObj->IsImage())
|
return 0;
|
|
RetainPtr<CPDF_Image> pImg = pObj->AsImage()->GetImage();
|
if (!pImg)
|
return 0;
|
|
CPDF_Dictionary* pDict = pImg->GetDict();
|
CPDF_Object* pFilter = pDict ? pDict->GetDirectObjectFor("Filter") : nullptr;
|
if (!pFilter)
|
return 0;
|
|
if (pFilter->IsArray())
|
return pFilter->AsArray()->GetCount();
|
if (pFilter->IsName())
|
return 1;
|
|
return 0;
|
}
|
|
FPDF_EXPORT unsigned long FPDF_CALLCONV
|
FPDFImageObj_GetImageFilter(FPDF_PAGEOBJECT image_object,
|
int index,
|
void* buffer,
|
unsigned long buflen) {
|
if (index < 0 || index >= FPDFImageObj_GetImageFilterCount(image_object))
|
return 0;
|
|
CPDF_PageObject* pObj = CPDFPageObjectFromFPDFPageObject(image_object);
|
CPDF_Object* pFilter =
|
pObj->AsImage()->GetImage()->GetDict()->GetDirectObjectFor("Filter");
|
ByteString bsFilter;
|
if (pFilter->IsName())
|
bsFilter = pFilter->AsName()->GetString();
|
else
|
bsFilter = pFilter->AsArray()->GetStringAt(index);
|
|
unsigned long len = bsFilter.GetLength() + 1;
|
if (buffer && len <= buflen)
|
memcpy(buffer, bsFilter.c_str(), len);
|
return len;
|
}
|
|
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
|
FPDFImageObj_GetImageMetadata(FPDF_PAGEOBJECT image_object,
|
FPDF_PAGE page,
|
FPDF_IMAGEOBJ_METADATA* metadata) {
|
CPDF_PageObject* pObj = CPDFPageObjectFromFPDFPageObject(image_object);
|
if (!pObj || !pObj->IsImage() || !metadata)
|
return false;
|
|
RetainPtr<CPDF_Image> pImg = pObj->AsImage()->GetImage();
|
if (!pImg)
|
return false;
|
|
metadata->marked_content_id = pObj->m_ContentMark.GetMarkedContentID();
|
|
const int nPixelWidth = pImg->GetPixelWidth();
|
const int nPixelHeight = pImg->GetPixelHeight();
|
metadata->width = nPixelWidth;
|
metadata->height = nPixelHeight;
|
|
const float nWidth = pObj->m_Right - pObj->m_Left;
|
const float nHeight = pObj->m_Top - pObj->m_Bottom;
|
constexpr int nPointsPerInch = 72;
|
if (nWidth != 0 && nHeight != 0) {
|
metadata->horizontal_dpi = nPixelWidth / nWidth * nPointsPerInch;
|
metadata->vertical_dpi = nPixelHeight / nHeight * nPointsPerInch;
|
}
|
|
metadata->bits_per_pixel = 0;
|
metadata->colorspace = FPDF_COLORSPACE_UNKNOWN;
|
|
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
|
if (!pPage || !pPage->m_pDocument.Get() || !pImg->GetStream())
|
return true;
|
|
auto pSource = pdfium::MakeRetain<CPDF_DIBSource>();
|
if (!pSource->StartLoadDIBSource(pPage->m_pDocument.Get(), pImg->GetStream(),
|
false, nullptr,
|
pPage->m_pPageResources.Get())) {
|
return true;
|
}
|
|
metadata->bits_per_pixel = pSource->GetBPP();
|
if (pSource->GetColorSpace())
|
metadata->colorspace = pSource->GetColorSpace()->GetFamily();
|
|
return true;
|
}
|
