| // Copyright 2016 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 |
| |
| #ifndef CORE_FPDFAPI_PAGE_CPDF_TRANSFERFUNC_H_ |
| #define CORE_FPDFAPI_PAGE_CPDF_TRANSFERFUNC_H_ |
| |
| #include <vector> |
| |
| #include "core/fxcrt/fx_memory_wrappers.h" |
| #include "core/fxcrt/observed_ptr.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| #include "core/fxge/dib/fx_dib.h" |
| #include "third_party/base/span.h" |
| |
| class CPDF_Document; |
| class CFX_DIBBase; |
| |
| class CPDF_TransferFunc final : public Retainable, public Observable { |
| public: |
| CONSTRUCT_VIA_MAKE_RETAIN; |
| |
| static constexpr size_t kChannelSampleSize = 256; |
| |
| FX_COLORREF TranslateColor(FX_COLORREF colorref) const; |
| RetainPtr<CFX_DIBBase> TranslateImage(const RetainPtr<CFX_DIBBase>& pSrc); |
| |
| const CPDF_Document* GetDocument() const { return m_pPDFDoc.Get(); } |
| |
| // Spans are |kChannelSampleSize| in size. |
| pdfium::span<const uint8_t> GetSamplesR() const; |
| pdfium::span<const uint8_t> GetSamplesG() const; |
| pdfium::span<const uint8_t> GetSamplesB() const; |
| |
| bool GetIdentity() const { return m_bIdentity; } |
| |
| private: |
| CPDF_TransferFunc(CPDF_Document* pDoc, |
| bool bIdentify, |
| std::vector<uint8_t, FxAllocAllocator<uint8_t>> samples_r, |
| std::vector<uint8_t, FxAllocAllocator<uint8_t>> samples_g, |
| std::vector<uint8_t, FxAllocAllocator<uint8_t>> samples_b); |
| ~CPDF_TransferFunc() override; |
| |
| UnownedPtr<CPDF_Document> const m_pPDFDoc; |
| const bool m_bIdentity; |
| const std::vector<uint8_t, FxAllocAllocator<uint8_t>> m_SamplesR; |
| const std::vector<uint8_t, FxAllocAllocator<uint8_t>> m_SamplesG; |
| const std::vector<uint8_t, FxAllocAllocator<uint8_t>> m_SamplesB; |
| }; |
| |
| #endif // CORE_FPDFAPI_PAGE_CPDF_TRANSFERFUNC_H_ |