chromium/third_party/skia/src/pdf/SkPDFUtils.cpp

/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "include/core/SkBitmap.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkImage.h"
#include "include/core/SkPath.h"
#include "include/core/SkPathTypes.h"
#include "include/core/SkRect.h"
#include "include/core/SkSize.h"
#include "include/core/SkStream.h"
#include "include/core/SkString.h"
#include "include/docs/SkPDFDocument.h"
#include "include/private/base/SkFixed.h"
#include "include/private/base/SkFloatingPoint.h"
#include "include/private/base/SkPoint_impl.h"
#include "include/private/base/SkTo.h"
#include "src/core/SkGeometry.h"
#include "src/core/SkPathPriv.h"
#include "src/image/SkImage_Base.h"
#include "src/pdf/SkPDFResourceDict.h"
#include "src/pdf/SkPDFTypes.h"
#include "src/pdf/SkPDFUtils.h"

#include <algorithm>
#include <ctime>
#include <utility>

#if defined(SK_BUILD_FOR_WIN)
#include "src/base/SkLeanWindows.h"
#endif

const char* SkPDFUtils::BlendModeName(SkBlendMode mode) { … }

std::unique_ptr<SkPDFArray> SkPDFUtils::RectToArray(const SkRect& r) { … }

std::unique_ptr<SkPDFArray> SkPDFUtils::MatrixToArray(const SkMatrix& matrix) { … }

void SkPDFUtils::MoveTo(SkScalar x, SkScalar y, SkWStream* content) { … }

void SkPDFUtils::AppendLine(SkScalar x, SkScalar y, SkWStream* content) { … }

static void append_cubic(SkScalar ctl1X, SkScalar ctl1Y,
                         SkScalar ctl2X, SkScalar ctl2Y,
                         SkScalar dstX, SkScalar dstY, SkWStream* content) { … }

static void append_quad(const SkPoint quad[], SkWStream* content) { … }

void SkPDFUtils::AppendRectangle(const SkRect& rect, SkWStream* content) { … }

void SkPDFUtils::EmitPath(const SkPath& path, SkPaint::Style paintStyle,
                          bool doConsumeDegerates, SkWStream* content,
                          SkScalar tolerance) { … }

void SkPDFUtils::ClosePath(SkWStream* content) { … }

void SkPDFUtils::PaintPath(SkPaint::Style style, SkPathFillType fill, SkWStream* content) { … }

void SkPDFUtils::StrokePath(SkWStream* content) { … }

void SkPDFUtils::ApplyGraphicState(int objectIndex, SkWStream* content) { … }

void SkPDFUtils::ApplyPattern(int objectIndex, SkWStream* content) { … }

// return "x/pow(10, places)", given 0<x<pow(10, places)
// result points to places+2 chars.
static size_t print_permil_as_decimal(int x, char* result, unsigned places) { … }


static constexpr int int_pow(int base, unsigned exp, int acc = 1) { … }


size_t SkPDFUtils::ColorToDecimalF(float value, char result[kFloatColorDecimalCount + 2]) { … }

size_t SkPDFUtils::ColorToDecimal(uint8_t value, char result[5]) { … }

bool SkPDFUtils::InverseTransformBBox(const SkMatrix& matrix, SkRect* bbox) { … }

void SkPDFUtils::PopulateTilingPatternDict(SkPDFDict* pattern,
                                           SkRect& bbox,
                                           std::unique_ptr<SkPDFDict> resources,
                                           const SkMatrix& matrix) { … }

bool SkPDFUtils::ToBitmap(const SkImage* img, SkBitmap* dst) { … }

#ifdef SK_PDF_BASE85_BINARY
void SkPDFUtils::Base85Encode(std::unique_ptr<SkStreamAsset> stream, SkDynamicMemoryWStream* dst) {
    SkASSERT(dst);
    SkASSERT(stream);
    dst->writeText("\n");
    int column = 0;
    while (true) {
        uint8_t src[4] = {0, 0, 0, 0};
        size_t count = stream->read(src, 4);
        SkASSERT(count < 5);
        if (0 == count) {
            dst->writeText("~>\n");
            return;
        }
        uint32_t v = ((uint32_t)src[0] << 24) | ((uint32_t)src[1] << 16) |
                     ((uint32_t)src[2] <<  8) | src[3];
        if (v == 0 && count == 4) {
            dst->writeText("z");
            column += 1;
        } else {
            char buffer[5];
            for (int n = 4; n > 0; --n) {
                buffer[n] = (v % 85) + '!';
                v /= 85;
            }
            buffer[0] = v + '!';
            dst->write(buffer, count + 1);
            column += count + 1;
        }
        if (column > 74) {
            dst->writeText("\n");
            column = 0;
        }
    }
}
#endif //  SK_PDF_BASE85_BINARY

void SkPDFUtils::AppendTransform(const SkMatrix& matrix, SkWStream* content) { … }


#if defined(SK_BUILD_FOR_WIN)

void SkPDFUtils::GetDateTime(SkPDF::DateTime* dt) {
    if (dt) {
        SYSTEMTIME st;
        GetSystemTime(&st);
        dt->fTimeZoneMinutes = 0;
        dt->fYear       = st.wYear;
        dt->fMonth      = SkToU8(st.wMonth);
        dt->fDayOfWeek  = SkToU8(st.wDayOfWeek);
        dt->fDay        = SkToU8(st.wDay);
        dt->fHour       = SkToU8(st.wHour);
        dt->fMinute     = SkToU8(st.wMinute);
        dt->fSecond     = SkToU8(st.wSecond);
    }
}

#else // SK_BUILD_FOR_WIN

void SkPDFUtils::GetDateTime(SkPDF::DateTime* dt) { … }
#endif // SK_BUILD_FOR_WIN