1/* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7#ifndef SkPDFUtils_DEFINED 8#define SkPDFUtils_DEFINED 9 10#include "SkPDFTypes.h" 11#include "SkPaint.h" 12#include "SkPath.h" 13#include "SkShader.h" 14#include "SkStream.h" 15#include "SkUtils.h" 16 17class SkMatrix; 18class SkPDFArray; 19struct SkRect; 20 21template <typename T> 22bool SkPackedArrayEqual(T* u, T* v, size_t n) { 23 SkASSERT(u); 24 SkASSERT(v); 25 return 0 == memcmp(u, v, n * sizeof(T)); 26} 27 28#if 0 29#define PRINT_NOT_IMPL(str) fprintf(stderr, str) 30#else 31#define PRINT_NOT_IMPL(str) 32#endif 33 34#define NOT_IMPLEMENTED(condition, assert) \ 35 do { \ 36 if ((bool)(condition)) { \ 37 PRINT_NOT_IMPL("NOT_IMPLEMENTED: " #condition "\n"); \ 38 SkDEBUGCODE(SkASSERT(!assert);) \ 39 } \ 40 } while (0) 41 42namespace SkPDFUtils { 43 44constexpr float kDpiForRasterScaleOne = 72.0f; 45 46sk_sp<SkPDFArray> RectToArray(const SkRect& rect); 47sk_sp<SkPDFArray> MatrixToArray(const SkMatrix& matrix); 48void AppendTransform(const SkMatrix& matrix, SkWStream* content); 49 50void MoveTo(SkScalar x, SkScalar y, SkWStream* content); 51void AppendLine(SkScalar x, SkScalar y, SkWStream* content); 52void AppendCubic(SkScalar ctl1X, SkScalar ctl1Y, 53 SkScalar ctl2X, SkScalar ctl2Y, 54 SkScalar dstX, SkScalar dstY, SkWStream* content); 55void AppendRectangle(const SkRect& rect, SkWStream* content); 56void EmitPath(const SkPath& path, SkPaint::Style paintStyle, 57 bool doConsumeDegerates, SkWStream* content, SkScalar tolerance = 0.25f); 58inline void EmitPath(const SkPath& path, SkPaint::Style paintStyle, 59 SkWStream* content, SkScalar tolerance = 0.25f) { 60 SkPDFUtils::EmitPath(path, paintStyle, true, content, tolerance); 61} 62void ClosePath(SkWStream* content); 63void PaintPath(SkPaint::Style style, SkPath::FillType fill, 64 SkWStream* content); 65void StrokePath(SkWStream* content); 66void DrawFormXObject(int objectIndex, SkWStream* content); 67void ApplyGraphicState(int objectIndex, SkWStream* content); 68void ApplyPattern(int objectIndex, SkWStream* content); 69 70// Converts (value / 255.0) with three significant digits of accuracy. 71// Writes value as string into result. Returns strlen() of result. 72size_t ColorToDecimal(uint8_t value, char result[5]); 73inline void AppendColorComponent(uint8_t value, SkWStream* wStream) { 74 char buffer[5]; 75 size_t len = SkPDFUtils::ColorToDecimal(value, buffer); 76 wStream->write(buffer, len); 77} 78 79// 3 = '-', '.', and '\0' characters. 80// 9 = number of significant digits 81// abs(FLT_MIN_10_EXP) = number of zeros in FLT_MIN 82const size_t kMaximumFloatDecimalLength = 3 + 9 - FLT_MIN_10_EXP; 83// FloatToDecimal is exposed for unit tests. 84size_t FloatToDecimal(float value, 85 char output[kMaximumFloatDecimalLength]); 86void AppendScalar(SkScalar value, SkWStream* stream); 87void WriteString(SkWStream* wStream, const char* input, size_t len); 88 89inline void WriteUInt16BE(SkDynamicMemoryWStream* wStream, uint16_t value) { 90 char result[4]; 91 result[0] = SkHexadecimalDigits::gUpper[ value >> 12 ]; 92 result[1] = SkHexadecimalDigits::gUpper[0xF & (value >> 8 )]; 93 result[2] = SkHexadecimalDigits::gUpper[0xF & (value >> 4 )]; 94 result[3] = SkHexadecimalDigits::gUpper[0xF & (value )]; 95 wStream->write(result, 4); 96} 97 98inline void WriteUInt8(SkDynamicMemoryWStream* wStream, uint8_t value) { 99 char result[2] = { SkHexadecimalDigits::gUpper[value >> 4], 100 SkHexadecimalDigits::gUpper[value & 0xF] }; 101 wStream->write(result, 2); 102} 103 104inline void WriteUTF16beHex(SkDynamicMemoryWStream* wStream, SkUnichar utf32) { 105 uint16_t utf16[2] = {0, 0}; 106 size_t len = SkUTF16_FromUnichar(utf32, utf16); 107 SkASSERT(len == 1 || len == 2); 108 SkPDFUtils::WriteUInt16BE(wStream, utf16[0]); 109 if (len == 2) { 110 SkPDFUtils::WriteUInt16BE(wStream, utf16[1]); 111 } 112} 113 114inline SkMatrix GetShaderLocalMatrix(const SkShader* shader) { 115 SkMatrix localMatrix; 116 if (sk_sp<SkShader> s = shader->makeAsALocalMatrixShader(&localMatrix)) { 117 return SkMatrix::Concat(s->getLocalMatrix(), localMatrix); 118 } 119 return shader->getLocalMatrix(); 120} 121bool InverseTransformBBox(const SkMatrix& matrix, SkRect* bbox); 122void PopulateTilingPatternDict(SkPDFDict* pattern, 123 SkRect& bbox, 124 sk_sp<SkPDFDict> resources, 125 const SkMatrix& matrix); 126 127bool ToBitmap(const SkImage* img, SkBitmap* dst); 128} // namespace SkPDFUtils 129 130#endif 131