--- core/fpdfapi/page/cpdf_pattern.h 2025-10-17 15:44:08.393532043 +0100 +++ core/fpdfapi/page/cpdf_pattern.h 2025-10-17 15:44:12.020459390 +0100 @@ -26,6 +26,7 @@ virtual CPDF_ShadingPattern* AsShadingPattern(); const CFX_Matrix& pattern_to_form() const { return pattern_to_form_; } + RetainPtr pattern_obj() const { return pattern_obj_; } protected: CPDF_Pattern(CPDF_Document* doc, @@ -35,7 +36,6 @@ // All the getters that return pointers return non-NULL pointers. CPDF_Document* document() const { return document_; } - RetainPtr pattern_obj() const { return pattern_obj_; } const CFX_Matrix& parent_matrix() const { return parent_matrix_; } void SetPatternToFormMatrix(); --- fpdfsdk/fpdf_edittext.cpp 2025-10-17 15:44:08.410532151 +0100 +++ fpdfsdk/fpdf_edittext.cpp 2025-10-17 15:55:18.804847559 +0100 @@ -13,6 +13,9 @@ #include "core/fpdfapi/font/cpdf_cidfont.h" #include "core/fpdfapi/font/cpdf_font.h" #include "core/fpdfapi/page/cpdf_docpagedata.h" +#include "core/fpdfapi/page/cpdf_form.h" +#include "core/fpdfapi/page/cpdf_pathobject.h" +#include "core/fpdfapi/page/cpdf_tilingpattern.h" #include "core/fpdfapi/page/cpdf_textobject.h" #include "core/fpdfapi/page/cpdf_textstate.h" #include "core/fpdfapi/parser/cpdf_array.h" @@ -834,6 +835,108 @@ return FPDFBitmapFromCFXDIBitmap(result_bitmap.Leak()); } +FPDF_BITMAP +FPDFPageObj_GetRenderedPattern(CPDF_Pattern& pattern, + CPDF_Document& doc, + CPDF_PageObject& pageObj, + CPDF_Page* optional_page) { + CPDF_TilingPattern* pTilingPattern = pattern.AsTilingPattern(); + if (!pTilingPattern) + return nullptr; + const std::unique_ptr pPatternForm = pTilingPattern->Load(&pageObj); + if (!pPatternForm) + return nullptr; + RetainPtr pDict = pattern.pattern_obj()->GetDict(); + CFX_FloatRect pattern_bbox = pDict->GetRectFor("BBox"); + + // `rect` has to use integer values. Round up as needed. + const FX_RECT rect = pattern_bbox.GetOuterRect(); + if (rect.IsEmpty() || !rect.Valid()) + return nullptr; + + auto result_bitmap = pdfium::MakeRetain(); + if (!result_bitmap->Create(rect.Width(), rect.Height(), + FXDIB_Format::kBgra)) { + return nullptr; + } + CFX_FloatRect cell_bbox = pattern.pattern_to_form().TransformRect(pattern_bbox); + CFX_FloatRect bitmap_rect(0.0f, 0.0f, rect.Width(), rect.Height()); + CFX_Matrix mtPattern2Bitmap; + mtPattern2Bitmap.MatchRect(bitmap_rect, cell_bbox); + + CFX_DefaultRenderDevice bitmap_device; + bitmap_device.AttachWithBackdropAndGroupKnockout( + result_bitmap, /*pBackdropBitmap=*/nullptr, /*bGroupKnockout=*/true); + + CPDF_RenderOptions options; + if (!pTilingPattern->colored()) + options.SetColorMode(CPDF_RenderOptions::kAlpha); + options.GetOptions().bForceHalftone = true; + + CPDF_RenderContext context(&doc, nullptr, nullptr); + context.AppendLayer(pPatternForm.get(), mtPattern2Bitmap); + context.Render(&bitmap_device, nullptr, &options, nullptr); + + CHECK(!result_bitmap->IsPremultiplied()); + + // Caller takes ownership. + return FPDFBitmapFromCFXDIBitmap(result_bitmap.Leak()); +} + +FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV +FPDFPageObj_GetRenderedStrokePattern(FPDF_DOCUMENT document, + FPDF_PAGE page, + FPDF_PAGEOBJECT page_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_PageObject* object = CPDFPageObjectFromFPDFPageObject(page_object); + if (!object) + return nullptr; + + const CPDF_Color* stroke = object->color_state().GetStrokeColor(); + if (!stroke || !stroke->IsPattern()) + return nullptr; + + RetainPtr pattern = stroke->GetPattern(); + if (!pattern) + return nullptr; + + return FPDFPageObj_GetRenderedPattern(*pattern, *doc, *object, optional_page); +} + +FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV +FPDFPageObj_GetRenderedFillPattern(FPDF_DOCUMENT document, + FPDF_PAGE page, + FPDF_PAGEOBJECT page_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_PageObject* object = CPDFPageObjectFromFPDFPageObject(page_object); + if (!object) + return nullptr; + + const CPDF_Color* fill = object->color_state().GetFillColor(); + if (!fill || !fill->IsPattern()) + return nullptr; + + RetainPtr pattern = fill->GetPattern(); + if (!pattern) + return nullptr; + + return FPDFPageObj_GetRenderedPattern(*pattern, *doc, *object, optional_page); +} + FPDF_EXPORT void FPDF_CALLCONV FPDFFont_Close(FPDF_FONT font) { // Take back ownership from caller and release. RetainPtr().Unleak(CPDFFontFromFPDFFont(font)); --- public/fpdf_edit.h 2025-10-17 15:44:08.415888612 +0100 +++ public/fpdf_edit.h 2025-10-17 15:44:12.022555158 +0100 @@ -1417,6 +1417,41 @@ float scale); // Experimental API. +// Get a bitmap rasterization of the stroke pattern of |page object|. +// To render correctly, the caller must provide the |document| associated with +// |page_object|. If there is a |page| associated with |page_object|, the +// caller should provide that as well. The returned bitmap will be owned by +// the caller, and FPDFBitmap_Destroy() must be called on the returned bitmap +// when it is no longer needed. +// +// document - handle to a document associated with |page_object|. +// page - handle to an optional page associated with |page_object|. +// page_object - handle to a page object. +// +// Returns the bitmap or NULL if the stroke is not a pattern or on failure. +FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV +FPDFPageObj_GetRenderedStrokePattern(FPDF_DOCUMENT document, + FPDF_PAGE page, + FPDF_PAGEOBJECT page_object); + +// Get a bitmap rasterization of the fill pattern of |page object|. +// To render correctly, the caller must provide the |document| associated with +// |page_object|. If there is a |page| associated with |page_object|, the +// caller should provide that as well. The returned bitmap will be owned by +// the caller, and FPDFBitmap_Destroy() must be called on the returned bitmap +// when it is no longer needed. +// +// document - handle to a document associated with |page_object|. +// page - handle to an optional page associated with |page_object|. +// page_object - handle to a page object. +// +// Returns the bitmap or NULL if the fill is not a pattern or on failure. +FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV +FPDFPageObj_GetRenderedFillPattern(FPDF_DOCUMENT document, + FPDF_PAGE page, + FPDF_PAGEOBJECT page_object); + +// Experimental API. // Get the font of a text object. // // text - the handle to the text object.