| // Copyright 2017 The PDFium Authors |
| // 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_FXGE_DIB_CFX_SCANLINECOMPOSITOR_H_ |
| #define CORE_FXGE_DIB_CFX_SCANLINECOMPOSITOR_H_ |
| |
| #include <memory> |
| |
| #include "core/fxcrt/fx_memory_wrappers.h" |
| #include "core/fxge/dib/fx_dib.h" |
| #include "third_party/abseil-cpp/absl/types/variant.h" |
| #include "third_party/base/span.h" |
| |
| class CFX_ScanlineCompositor { |
| public: |
| CFX_ScanlineCompositor(); |
| ~CFX_ScanlineCompositor(); |
| |
| bool Init(FXDIB_Format dest_format, |
| FXDIB_Format src_format, |
| int32_t width, |
| pdfium::span<const uint32_t> src_palette, |
| uint32_t mask_color, |
| BlendMode blend_type, |
| bool bClip, |
| bool bRgbByteOrder); |
| |
| void CompositeRgbBitmapLine(pdfium::span<uint8_t> dest_scan, |
| pdfium::span<const uint8_t> src_scan, |
| int width, |
| pdfium::span<const uint8_t> clip_scan); |
| |
| void CompositePalBitmapLine(pdfium::span<uint8_t> dest_scan, |
| pdfium::span<const uint8_t> src_scan, |
| int src_left, |
| int width, |
| pdfium::span<const uint8_t> clip_scan); |
| |
| void CompositeByteMaskLine(pdfium::span<uint8_t> dest_scan, |
| pdfium::span<const uint8_t> src_scan, |
| int width, |
| pdfium::span<const uint8_t> clip_scan); |
| |
| void CompositeBitMaskLine(pdfium::span<uint8_t> dest_scan, |
| pdfium::span<const uint8_t> src_scan, |
| int src_left, |
| int width, |
| pdfium::span<const uint8_t> clip_scan); |
| |
| private: |
| class Palette { |
| public: |
| Palette(); |
| ~Palette(); |
| |
| void Reset(); |
| pdfium::span<uint8_t> Make8BitPalette(size_t nElements); |
| pdfium::span<uint32_t> Make32BitPalette(size_t nElements); |
| |
| // Hard CHECK() if mismatch between created and requested widths. |
| pdfium::span<const uint8_t> Get8BitPalette() const; |
| pdfium::span<const uint32_t> Get32BitPalette() const; |
| |
| private: |
| // If 0, then no |m_pData|. |
| // If 1, then |m_pData| is really uint8_t* instead. |
| // If 4, then |m_pData| is uint32_t* as expected. |
| size_t m_Width = 0; |
| size_t m_nElements = 0; |
| std::unique_ptr<uint32_t, FxFreeDeleter> m_pData; |
| }; |
| |
| void InitSourcePalette(FXDIB_Format src_format, |
| FXDIB_Format dest_format, |
| pdfium::span<const uint32_t> src_palette); |
| |
| void InitSourceMask(uint32_t mask_color); |
| |
| struct PalTransform { |
| bool dest_is_argb; |
| bool dest_has_alpha; |
| bool src_is_1_bit; // False = 8 bit. |
| }; |
| struct RgbTransform { |
| bool src_has_alpha; |
| bool dest_has_alpha; |
| bool is_normal_blend; |
| bool clip; |
| }; |
| absl::variant<PalTransform, RgbTransform> m_Transform; |
| FXDIB_Format m_SrcFormat; |
| FXDIB_Format m_DestFormat; |
| Palette m_SrcPalette; |
| int m_MaskAlpha; |
| int m_MaskRed; |
| int m_MaskGreen; |
| int m_MaskBlue; |
| BlendMode m_BlendType = BlendMode::kNormal; |
| bool m_bRgbByteOrder = false; |
| }; |
| |
| #endif // CORE_FXGE_DIB_CFX_SCANLINECOMPOSITOR_H_ |