| // 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 <memory> |
| #include <utility> |
| |
| #include "core/fpdfapi/page/cpdf_dib.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_dictionary.h" |
| #include "core/fpdfapi/parser/cpdf_name.h" |
| #include "core/fpdfapi/parser/cpdf_stream_acc.h" |
| #include "core/fpdfapi/render/cpdf_imagerenderer.h" |
| #include "core/fpdfapi/render/cpdf_rendercontext.h" |
| #include "core/fpdfapi/render/cpdf_renderstatus.h" |
| #include "core/fxge/cfx_defaultrenderdevice.h" |
| #include "fpdfsdk/cpdfsdk_customaccess.h" |
| #include "fpdfsdk/cpdfsdk_helpers.h" |
| |
| namespace { |
| |
| // These checks ensure the consistency of colorspace values across core/ and |
| // public/. |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kDeviceGray) == |
| FPDF_COLORSPACE_DEVICEGRAY, |
| "kDeviceGray value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kDeviceRGB) == |
| FPDF_COLORSPACE_DEVICERGB, |
| "kDeviceRGB value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kDeviceCMYK) == |
| FPDF_COLORSPACE_DEVICECMYK, |
| "kDeviceCMYK value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kCalGray) == |
| FPDF_COLORSPACE_CALGRAY, |
| "kCalGray value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kCalRGB) == |
| FPDF_COLORSPACE_CALRGB, |
| "kCalRGB value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kLab) == |
| FPDF_COLORSPACE_LAB, |
| "kLab value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kICCBased) == |
| FPDF_COLORSPACE_ICCBASED, |
| "kICCBased value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kSeparation) == |
| FPDF_COLORSPACE_SEPARATION, |
| "kSeparation value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kDeviceN) == |
| FPDF_COLORSPACE_DEVICEN, |
| "kDeviceN value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kIndexed) == |
| FPDF_COLORSPACE_INDEXED, |
| "kIndexed value mismatch"); |
| static_assert(static_cast<int>(CPDF_ColorSpace::Family::kPattern) == |
| FPDF_COLORSPACE_PATTERN, |
| "kPattern value mismatch"); |
| |
| RetainPtr<IFX_SeekableReadStream> MakeSeekableReadStream( |
| FPDF_FILEACCESS* pFileAccess) { |
| return pdfium::MakeRetain<CPDFSDK_CustomAccess>(pFileAccess); |
| } |
| |
| CPDF_ImageObject* CPDFImageObjectFromFPDFPageObject( |
| FPDF_PAGEOBJECT image_object) { |
| CPDF_PageObject* pPageObject = CPDFPageObjectFromFPDFPageObject(image_object); |
| return pPageObject ? pPageObject->AsImage() : nullptr; |
| } |
| |
| bool LoadJpegHelper(FPDF_PAGE* pages, |
| int count, |
| FPDF_PAGEOBJECT image_object, |
| FPDF_FILEACCESS* file_access, |
| bool inline_jpeg) { |
| CPDF_ImageObject* pImgObj = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!pImgObj) |
| return false; |
| |
| if (!file_access) |
| return false; |
| |
| if (pages) { |
| for (int index = 0; index < count; index++) { |
| CPDF_Page* pPage = CPDFPageFromFPDFPage(pages[index]); |
| if (pPage) |
| pImgObj->GetImage()->ResetCache(pPage); |
| } |
| } |
| |
| RetainPtr<IFX_SeekableReadStream> pFile = MakeSeekableReadStream(file_access); |
| if (inline_jpeg) |
| 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 = std::make_unique<CPDF_ImageObject>(); |
| pImageObj->SetImage(pdfium::MakeRetain<CPDF_Image>(pDoc)); |
| |
| // Caller takes ownership. |
| return FPDFPageObjectFromCPDFPageObject(pImageObj.release()); |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV |
| FPDFImageObj_LoadJpegFile(FPDF_PAGE* pages, |
| int count, |
| FPDF_PAGEOBJECT image_object, |
| FPDF_FILEACCESS* file_access) { |
| return LoadJpegHelper(pages, count, image_object, file_access, false); |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV |
| FPDFImageObj_LoadJpegFileInline(FPDF_PAGE* pages, |
| int count, |
| FPDF_PAGEOBJECT image_object, |
| FPDF_FILEACCESS* file_access) { |
| return LoadJpegHelper(pages, count, image_object, file_access, 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) { |
| CPDF_ImageObject* pImgObj = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!pImgObj) |
| return false; |
| |
| pImgObj->SetImageMatrix(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->SetDirty(true); |
| return true; |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV |
| FPDFImageObj_SetBitmap(FPDF_PAGE* pages, |
| int count, |
| FPDF_PAGEOBJECT image_object, |
| FPDF_BITMAP bitmap) { |
| CPDF_ImageObject* pImgObj = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!pImgObj) |
| return false; |
| |
| if (!bitmap) |
| return false; |
| |
| if (pages) { |
| for (int index = 0; index < count; index++) { |
| CPDF_Page* pPage = CPDFPageFromFPDFPage(pages[index]); |
| if (pPage) |
| pImgObj->GetImage()->ResetCache(pPage); |
| } |
| } |
| |
| RetainPtr<CFX_DIBitmap> holder(CFXDIBitmapFromFPDFBitmap(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_ImageObject* pImgObj = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!pImgObj) |
| return nullptr; |
| |
| RetainPtr<CPDF_Image> pImg = pImgObj->GetImage(); |
| if (!pImg) |
| return nullptr; |
| |
| RetainPtr<CFX_DIBBase> pSource = pImg->LoadDIBBase(); |
| if (!pSource) |
| return nullptr; |
| |
| // 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. |
| RetainPtr<CFX_DIBitmap> pBitmap = |
| pSource->GetBPP() == 1 ? pSource->ConvertTo(FXDIB_Format::k8bppRgb) |
| : pSource->Realize(); |
| |
| return FPDFBitmapFromCFXDIBitmap(pBitmap.Leak()); |
| } |
| |
| FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV |
| FPDFImageObj_GetRenderedBitmap(FPDF_DOCUMENT document, |
| FPDF_PAGE page, |
| FPDF_PAGEOBJECT image_object) { |
| CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document); |
| if (!doc) |
| return nullptr; |
| |
| CPDF_Page* optional_page = CPDFPageFromFPDFPage(page); |
| if (optional_page && optional_page->GetDocument() != doc) |
| return nullptr; |
| |
| CPDF_ImageObject* image = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!image) |
| return nullptr; |
| |
| // Create |result_bitmap|. |
| const CFX_Matrix& image_matrix = image->matrix(); |
| int output_width = image_matrix.a; |
| int output_height = image_matrix.d; |
| auto result_bitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (!result_bitmap->Create(output_width, output_height, FXDIB_Format::kArgb)) |
| return nullptr; |
| |
| // Set up all the rendering code. |
| CPDF_Dictionary* page_resources = |
| optional_page ? optional_page->GetPageResources() : nullptr; |
| CPDF_RenderContext context(doc, page_resources, /*pPageCache=*/nullptr); |
| CFX_DefaultRenderDevice device; |
| device.Attach(result_bitmap, /*bRgbByteOrder=*/false, |
| /*pBackdropBitmap=*/nullptr, /*bGroupKnockout=*/false); |
| CPDF_RenderStatus status(&context, &device); |
| CPDF_ImageRenderer renderer; |
| |
| // Need to first flip the image, as expected by |renderer|. |
| CFX_Matrix render_matrix(1, 0, 0, -1, 0, output_height); |
| |
| // Then take |image_matrix|'s offset into account. |
| render_matrix.Translate(-image_matrix.e, image_matrix.f); |
| |
| // Do the actual rendering. |
| bool should_continue = renderer.Start(&status, image, render_matrix, |
| /*bStdCS=*/false, BlendMode::kNormal); |
| while (should_continue) |
| should_continue = renderer.Continue(/*pPause=*/nullptr); |
| |
| if (!renderer.GetResult()) |
| return nullptr; |
| |
| // Caller takes ownership. |
| return FPDFBitmapFromCFXDIBitmap(result_bitmap.Leak()); |
| } |
| |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDFImageObj_GetImageDataDecoded(FPDF_PAGEOBJECT image_object, |
| void* buffer, |
| unsigned long buflen) { |
| CPDF_ImageObject* pImgObj = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!pImgObj) |
| return 0; |
| |
| RetainPtr<CPDF_Image> pImg = pImgObj->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_ImageObject* pImgObj = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!pImgObj) |
| return 0; |
| |
| RetainPtr<CPDF_Image> pImg = pImgObj->GetImage(); |
| if (!pImg) |
| return 0; |
| |
| CPDF_Stream* pImgStream = pImg->GetStream(); |
| if (!pImgStream) |
| return 0; |
| |
| return GetRawStreamMaybeCopyAndReturnLength(pImgStream, buffer, buflen); |
| } |
| |
| FPDF_EXPORT int FPDF_CALLCONV |
| FPDFImageObj_GetImageFilterCount(FPDF_PAGEOBJECT image_object) { |
| CPDF_ImageObject* pImgObj = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!pImgObj) |
| return 0; |
| |
| RetainPtr<CPDF_Image> pImg = pImgObj->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()->size(); |
| 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); |
| |
| return NulTerminateMaybeCopyAndReturnLength(bsFilter, buffer, buflen); |
| } |
| |
| FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV |
| FPDFImageObj_GetImageMetadata(FPDF_PAGEOBJECT image_object, |
| FPDF_PAGE page, |
| FPDF_IMAGEOBJ_METADATA* metadata) { |
| CPDF_ImageObject* pImgObj = CPDFImageObjectFromFPDFPageObject(image_object); |
| if (!pImgObj || !metadata) |
| return false; |
| |
| RetainPtr<CPDF_Image> pImg = pImgObj->GetImage(); |
| if (!pImg) |
| return false; |
| |
| metadata->marked_content_id = |
| pImgObj->GetContentMarks()->GetMarkedContentID(); |
| |
| const int nPixelWidth = pImg->GetPixelWidth(); |
| const int nPixelHeight = pImg->GetPixelHeight(); |
| metadata->width = nPixelWidth; |
| metadata->height = nPixelHeight; |
| |
| const float nWidth = pImgObj->GetRect().Width(); |
| const float nHeight = pImgObj->GetRect().Height(); |
| 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->GetDocument() || !pImg->GetStream()) |
| return true; |
| |
| auto pSource = pdfium::MakeRetain<CPDF_DIB>(); |
| CPDF_DIB::LoadState ret = |
| pSource->StartLoadDIBBase(pPage->GetDocument(), pImg->GetStream(), false, |
| nullptr, pPage->GetPageResources(), false, |
| CPDF_ColorSpace::Family::kUnknown, false); |
| if (ret == CPDF_DIB::LoadState::kFail) |
| return true; |
| |
| metadata->bits_per_pixel = pSource->GetBPP(); |
| if (pSource->GetColorSpace()) { |
| metadata->colorspace = |
| static_cast<int>(pSource->GetColorSpace()->GetFamily()); |
| } |
| return true; |
| } |
