// Copyright 2014 The PDFium Authors // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "core/fxge/skia/fx_skia_device.h" #include <math.h> #include <stddef.h> #include <stdint.h> #include <algorithm> #include <array> #include <limits> #include <memory> #include <utility> #include <vector> #include "build/build_config.h" #include "core/fpdfapi/page/cpdf_expintfunc.h" #include "core/fpdfapi/page/cpdf_function.h" #include "core/fpdfapi/page/cpdf_meshstream.h" #include "core/fpdfapi/page/cpdf_sampledfunc.h" #include "core/fpdfapi/page/cpdf_shadingpattern.h" #include "core/fpdfapi/page/cpdf_stitchfunc.h" #include "core/fpdfapi/parser/cpdf_array.h" #include "core/fpdfapi/parser/cpdf_dictionary.h" #include "core/fpdfapi/parser/cpdf_stream.h" #include "core/fpdfapi/parser/cpdf_stream_acc.h" #include "core/fxcrt/cfx_bitstream.h" #include "core/fxcrt/check.h" #include "core/fxcrt/check_op.h" #include "core/fxcrt/data_vector.h" #include "core/fxcrt/fx_2d_size.h" #include "core/fxcrt/fx_coordinates.h" #include "core/fxcrt/fx_memory.h" #include "core/fxcrt/fx_system.h" #include "core/fxcrt/notreached.h" #include "core/fxcrt/numerics/safe_conversions.h" #include "core/fxcrt/ptr_util.h" #include "core/fxcrt/span.h" #include "core/fxcrt/stl_util.h" #include "core/fxge/agg/cfx_agg_imagerenderer.h" #include "core/fxge/cfx_defaultrenderdevice.h" #include "core/fxge/cfx_fillrenderoptions.h" #include "core/fxge/cfx_font.h" #include "core/fxge/cfx_graphstatedata.h" #include "core/fxge/cfx_path.h" #include "core/fxge/cfx_renderdevice.h" #include "core/fxge/cfx_substfont.h" #include "core/fxge/cfx_textrenderoptions.h" #include "core/fxge/dib/cfx_dibitmap.h" #include "core/fxge/dib/cstretchengine.h" #include "core/fxge/dib/fx_dib.h" #include "core/fxge/text_char_pos.h" #include "third_party/skia/include/core/SkBlendMode.h" #include "third_party/skia/include/core/SkCanvas.h" #include "third_party/skia/include/core/SkClipOp.h" #include "third_party/skia/include/core/SkColorFilter.h" #include "third_party/skia/include/core/SkColorPriv.h" #include "third_party/skia/include/core/SkColorType.h" #include "third_party/skia/include/core/SkImage.h" #include "third_party/skia/include/core/SkImageInfo.h" #include "third_party/skia/include/core/SkMaskFilter.h" #include "third_party/skia/include/core/SkPaint.h" #include "third_party/skia/include/core/SkPath.h" #include "third_party/skia/include/core/SkPathEffect.h" #include "third_party/skia/include/core/SkPathUtils.h" #include "third_party/skia/include/core/SkPixmap.h" #include "third_party/skia/include/core/SkRSXform.h" #include "third_party/skia/include/core/SkRect.h" #include "third_party/skia/include/core/SkRefCnt.h" #include "third_party/skia/include/core/SkSamplingOptions.h" #include "third_party/skia/include/core/SkShader.h" #include "third_party/skia/include/core/SkStream.h" #include "third_party/skia/include/core/SkSurface.h" #include "third_party/skia/include/core/SkTextBlob.h" #include "third_party/skia/include/core/SkTileMode.h" #include "third_party/skia/include/core/SkTypeface.h" #include "third_party/skia/include/effects/SkDashPathEffect.h" #include "third_party/skia/include/effects/SkGradientShader.h" #include "third_party/skia/include/pathops/SkPathOps.h" namespace { #define SHOW_SKIA_PATH … #if SHOW_SKIA_PATH #define SHOW_SKIA_PATH_SHORTHAND … #endif #if SHOW_SKIA_PATH void DebugShowSkiaPaint(const SkPaint& paint) { if (SkPaint::kFill_Style == paint.getStyle()) { printf("fill 0x%08x\n", paint.getColor()); } else { printf("stroke 0x%08x width %g\n", paint.getColor(), paint.getStrokeWidth()); } } #endif // SHOW_SKIA_PATH void DebugShowSkiaPath(const SkPath& path) { … } void DebugShowCanvasClip(CFX_SkiaDeviceDriver* driver, const SkCanvas* canvas) { … } void DebugShowSkiaDrawPath(CFX_SkiaDeviceDriver* driver, const SkCanvas* canvas, const SkPaint& paint, const SkPath& path) { … } void DebugShowSkiaDrawRect(CFX_SkiaDeviceDriver* driver, const SkCanvas* canvas, const SkPaint& paint, const SkRect& rect) { … } void DebugValidate(const RetainPtr<CFX_DIBitmap>& bitmap) { … } SkColorType Get32BitSkColorType(bool is_rgb_byte_order) { … } SkPathFillType GetAlternateOrWindingFillType( const CFX_FillRenderOptions& fill_options) { … } SkFont::Edging GetFontEdgingType(const CFX_TextRenderOptions& text_options) { … } bool IsPathAPoint(const SkPath& path) { … } SkPath BuildPath(const CFX_Path& path) { … } SkMatrix ToSkMatrix(const CFX_Matrix& m) { … } // use when pdf's y-axis points up instead of down SkMatrix ToFlippedSkMatrix(const CFX_Matrix& m, SkScalar flip) { … } SkBlendMode GetSkiaBlendMode(BlendMode blend_type) { … } // Add begin & end colors into `colors` array for each gradient transition. // // `is_encode_reversed` must be set to true when the parent function of `func` // has an Encode array, and the matching pair of encode values for `func` are // in decreasing order. bool AddColors(const CPDF_ExpIntFunc* func, DataVector<SkColor>& colors, bool is_encode_reversed) { … } uint8_t FloatToByte(float f) { … } bool AddSamples(const CPDF_SampledFunc* func, DataVector<SkColor>& colors, DataVector<SkScalar>& pos) { … } bool AddStitching(const CPDF_StitchFunc* func, DataVector<SkColor>& colors, DataVector<SkScalar>& pos) { … } // see https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line SkScalar LineSide(const SkPoint& line_start, const SkPoint& line_end, const SkPoint& pt) { … } SkPoint IntersectSides(const SkPoint& parallelPt, const SkVector& paraRay, const SkPoint& perpendicularPt) { … } void ClipAngledGradient(pdfium::span<const SkPoint, 2> pts, pdfium::span<const SkPoint, 4> rect_pts, bool clip_start, bool clip_end, SkPath* clip) { … } // Converts a stroking path to scanlines void PaintStroke(SkPaint* spaint, const CFX_GraphStateData* graph_state, const SkMatrix& matrix, const CFX_FillRenderOptions& fill_options) { … } void SetBitmapMatrix(const CFX_Matrix& m, int width, int height, SkMatrix* skMatrix) { … } void SetBitmapPaint(bool is_mask, bool anti_alias, float alpha, uint32_t argb, BlendMode blend_type, SkPaint* paint) { … } void SetBitmapPaintForMerge(bool is_mask, bool anti_alias, float alpha, BlendMode blend_type, SkPaint* paint) { … } // Makes a bitmap filled with a solid color for debugging with `SkPicture`. RetainPtr<CFX_DIBitmap> MakeDebugBitmap(int width, int height, uint32_t color) { … } bool HasRSX(pdfium::span<const TextCharPos> char_pos, float* scaleXPtr, bool* oneAtATimePtr) { … } } // namespace // static std::unique_ptr<CFX_SkiaDeviceDriver> CFX_SkiaDeviceDriver::Create( RetainPtr<CFX_DIBitmap> pBitmap, bool bRgbByteOrder, RetainPtr<CFX_DIBitmap> pBackdropBitmap, bool bGroupKnockout) { … } // static std::unique_ptr<CFX_SkiaDeviceDriver> CFX_SkiaDeviceDriver::Create( SkCanvas& canvas) { … } CFX_SkiaDeviceDriver::CFX_SkiaDeviceDriver( RetainPtr<CFX_DIBitmap> pBitmap, bool bRgbByteOrder, RetainPtr<CFX_DIBitmap> pBackdropBitmap, bool bGroupKnockout) : … { … } CFX_SkiaDeviceDriver::CFX_SkiaDeviceDriver(SkCanvas& canvas) : … { … } CFX_SkiaDeviceDriver::~CFX_SkiaDeviceDriver() { … } bool CFX_SkiaDeviceDriver::DrawDeviceText( pdfium::span<const TextCharPos> pCharPos, CFX_Font* pFont, const CFX_Matrix& mtObject2Device, float font_size, uint32_t color, const CFX_TextRenderOptions& options) { … } // TODO(crbug.com/pdfium/1999): Merge with `DrawDeviceText()` and refactor // common logic. // TODO(crbug.com/pdfium/1774): Sometimes the thickness of the glyphs is not // ideal. Improve text rendering results regarding different font weight. bool CFX_SkiaDeviceDriver::TryDrawText(pdfium::span<const TextCharPos> char_pos, const CFX_Font* pFont, const CFX_Matrix& matrix, float font_size, uint32_t color, const CFX_TextRenderOptions& options) { … } int CFX_SkiaDeviceDriver::GetDriverType() const { … } bool CFX_SkiaDeviceDriver::MultiplyAlpha(float alpha) { … } bool CFX_SkiaDeviceDriver::MultiplyAlphaMask( RetainPtr<const CFX_DIBitmap> mask) { … } DeviceType CFX_SkiaDeviceDriver::GetDeviceType() const { … } int CFX_SkiaDeviceDriver::GetDeviceCaps(int caps_id) const { … } void CFX_SkiaDeviceDriver::SaveState() { … } void CFX_SkiaDeviceDriver::RestoreState(bool bKeepSaved) { … } bool CFX_SkiaDeviceDriver::SetClip_PathFill( const CFX_Path& path, // path info const CFX_Matrix* pObject2Device, // flips object's y-axis const CFX_FillRenderOptions& fill_options) { … } bool CFX_SkiaDeviceDriver::SetClip_PathStroke( const CFX_Path& path, // path info const CFX_Matrix* pObject2Device, // required transformation const CFX_GraphStateData* pGraphState // graphic state, for pen attributes ) { … } bool CFX_SkiaDeviceDriver::DrawPath(const CFX_Path& path, const CFX_Matrix* pObject2Device, const CFX_GraphStateData* pGraphState, uint32_t fill_color, uint32_t stroke_color, const CFX_FillRenderOptions& fill_options) { … } bool CFX_SkiaDeviceDriver::FillRect(const FX_RECT& rect, uint32_t fill_color) { … } bool CFX_SkiaDeviceDriver::DrawShading(const CPDF_ShadingPattern& pattern, const CFX_Matrix& matrix, const FX_RECT& clip_rect, int alpha) { … } FX_RECT CFX_SkiaDeviceDriver::GetClipBox() const { … } bool CFX_SkiaDeviceDriver::GetDIBits(RetainPtr<CFX_DIBitmap> bitmap, int left, int top) const { … } RetainPtr<const CFX_DIBitmap> CFX_SkiaDeviceDriver::GetBackDrop() const { … } bool CFX_SkiaDeviceDriver::SetDIBits(RetainPtr<const CFX_DIBBase> bitmap, uint32_t color, const FX_RECT& src_rect, int left, int top, BlendMode blend_type) { … } bool CFX_SkiaDeviceDriver::StretchDIBits(RetainPtr<const CFX_DIBBase> bitmap, uint32_t color, int dest_left, int dest_top, int dest_width, int dest_height, const FX_RECT* pClipRect, const FXDIB_ResampleOptions& options, BlendMode blend_type) { … } RenderDeviceDriverIface::StartResult CFX_SkiaDeviceDriver::StartDIBits( RetainPtr<const CFX_DIBBase> bitmap, float alpha, uint32_t color, const CFX_Matrix& matrix, const FXDIB_ResampleOptions& options, BlendMode blend_type) { … } void CFX_DIBitmap::PreMultiply() { … } void CFX_DIBitmap::UnPreMultiply() { … } bool CFX_SkiaDeviceDriver::DrawBitsWithMask(RetainPtr<const CFX_DIBBase> bitmap, RetainPtr<const CFX_DIBBase> mask, float alpha, const CFX_Matrix& matrix, BlendMode blend_type) { … } bool CFX_SkiaDeviceDriver::SetBitsWithMask(RetainPtr<const CFX_DIBBase> bitmap, RetainPtr<const CFX_DIBBase> mask, int dest_left, int dest_top, float alpha, BlendMode blend_type) { … } void CFX_SkiaDeviceDriver::SetGroupKnockout(bool group_knockout) { … } void CFX_SkiaDeviceDriver::SyncInternalBitmaps() { … } void CFX_SkiaDeviceDriver::Clear(uint32_t color) { … } bool CFX_SkiaDeviceDriver::StartDIBitsSkia(RetainPtr<const CFX_DIBBase> bitmap, const FX_RECT& src_rect, float alpha, uint32_t color, const CFX_Matrix& matrix, const FXDIB_ResampleOptions& options, BlendMode blend_type) { … } void CFX_SkiaDeviceDriver::DrawPathImpl(const SkPath& path, const SkPaint& paint) { … } CFX_SkiaDeviceDriver::CharDetail::CharDetail() = default; CFX_SkiaDeviceDriver::CharDetail::~CharDetail() = default; bool CFX_DefaultRenderDevice::AttachSkiaImpl( RetainPtr<CFX_DIBitmap> pBitmap, bool bRgbByteOrder, RetainPtr<CFX_DIBitmap> pBackdropBitmap, bool bGroupKnockout) { … } bool CFX_DefaultRenderDevice::AttachCanvas(SkCanvas& canvas) { … } bool CFX_DefaultRenderDevice::CreateSkia( int width, int height, FXDIB_Format format, RetainPtr<CFX_DIBitmap> pBackdropBitmap) { … }
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