diff options
Diffstat (limited to 'fpdfsdk/fpdfeditimg.cpp')
| -rw-r--r-- | fpdfsdk/fpdfeditimg.cpp | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/fpdfsdk/fpdfeditimg.cpp b/fpdfsdk/fpdfeditimg.cpp index f19e21c8ff..662ad23d76 100644 --- a/fpdfsdk/fpdfeditimg.cpp +++ b/fpdfsdk/fpdfeditimg.cpp @@ -9,14 +9,40 @@ #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, @@ -226,3 +252,49 @@ FPDFImageObj_GetImageFilter(FPDF_PAGEOBJECT image_object, return Utf16EncodeMaybeCopyAndReturnLength(wsFilters, buffer, buflen); } + +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; + + CFX_RetainPtr<CPDF_Image> pImg = pObj->AsImage()->GetImage(); + if (!pImg) + return false; + + 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; +} |