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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPDFUtils_DEFINED
#define SkPDFUtils_DEFINED
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkShader.h"
#include "include/core/SkStream.h"
#include "src/base/SkUTF.h"
#include "src/base/SkUtils.h"
#include "src/pdf/SkPDFTypes.h"
#include "src/shaders/SkShaderBase.h"
#include "src/utils/SkFloatToDecimal.h"
class SkMatrix;
class SkPDFArray;
struct SkRect;
template <typename T>
bool SkPackedArrayEqual(T* u, T* v, size_t n) {
SkASSERT(u);
SkASSERT(v);
return 0 == memcmp(u, v, n * sizeof(T));
}
#if 0
#define PRINT_NOT_IMPL(str) fprintf(stderr, str)
#else
#define PRINT_NOT_IMPL(str)
#endif
#define NOT_IMPLEMENTED(condition, assert) \
do { \
if ((bool)(condition)) { \
PRINT_NOT_IMPL("NOT_IMPLEMENTED: " #condition "\n"); \
SkDEBUGCODE(SkASSERT(!assert);) \
} \
} while (0)
namespace SkPDFUtils {
const char* BlendModeName(SkBlendMode);
std::unique_ptr<SkPDFArray> RectToArray(const SkRect& rect);
std::unique_ptr<SkPDFArray> MatrixToArray(const SkMatrix& matrix);
void MoveTo(SkScalar x, SkScalar y, SkWStream* content);
void AppendLine(SkScalar x, SkScalar y, SkWStream* content);
void AppendRectangle(const SkRect& rect, SkWStream* content);
void EmitPath(const SkPath& path, SkPaint::Style paintStyle,
bool doConsumeDegerates, SkWStream* content, SkScalar tolerance = 0.25f);
inline void EmitPath(const SkPath& path, SkPaint::Style paintStyle,
SkWStream* content, SkScalar tolerance = 0.25f) {
SkPDFUtils::EmitPath(path, paintStyle, true, content, tolerance);
}
void ClosePath(SkWStream* content);
void PaintPath(SkPaint::Style style, SkPathFillType fill, SkWStream* content);
void StrokePath(SkWStream* content);
void ApplyGraphicState(int objectIndex, SkWStream* content);
void ApplyPattern(int objectIndex, SkWStream* content);
// Converts (value / 255.0) with three significant digits of accuracy.
// Writes value as string into result. Returns strlen() of result.
size_t ColorToDecimal(uint8_t value, char result[5]);
static constexpr unsigned kFloatColorDecimalCount = 4;
size_t ColorToDecimalF(float value, char result[kFloatColorDecimalCount + 2]);
inline void AppendColorComponent(uint8_t value, SkWStream* wStream) {
char buffer[5];
size_t len = SkPDFUtils::ColorToDecimal(value, buffer);
wStream->write(buffer, len);
}
inline void AppendColorComponentF(float value, SkWStream* wStream) {
char buffer[kFloatColorDecimalCount + 2];
size_t len = SkPDFUtils::ColorToDecimalF(value, buffer);
wStream->write(buffer, len);
}
inline void AppendScalar(SkScalar value, SkWStream* stream) {
char result[kMaximumSkFloatToDecimalLength];
size_t len = SkFloatToDecimal(SkScalarToFloat(value), result);
SkASSERT(len < kMaximumSkFloatToDecimalLength);
stream->write(result, len);
}
inline void WriteUInt16BE(SkWStream* wStream, uint16_t value) {
char result[4] = { SkHexadecimalDigits::gUpper[ value >> 12 ],
SkHexadecimalDigits::gUpper[0xF & (value >> 8 )],
SkHexadecimalDigits::gUpper[0xF & (value >> 4 )],
SkHexadecimalDigits::gUpper[0xF & (value )] };
wStream->write(result, 4);
}
inline void WriteUInt8(SkWStream* wStream, uint8_t value) {
char result[2] = { SkHexadecimalDigits::gUpper[value >> 4],
SkHexadecimalDigits::gUpper[value & 0xF] };
wStream->write(result, 2);
}
inline void WriteUTF16beHex(SkWStream* wStream, SkUnichar utf32) {
uint16_t utf16[2] = {0, 0};
size_t len = SkUTF::ToUTF16(utf32, utf16);
SkASSERT(len == 1 || len == 2);
SkPDFUtils::WriteUInt16BE(wStream, utf16[0]);
if (len == 2) {
SkPDFUtils::WriteUInt16BE(wStream, utf16[1]);
}
}
inline SkMatrix GetShaderLocalMatrix(const SkShader* shader) {
SkMatrix localMatrix;
if (sk_sp<SkShader> s = as_SB(shader)->makeAsALocalMatrixShader(&localMatrix)) {
return localMatrix;
}
return SkMatrix::I();
}
bool InverseTransformBBox(const SkMatrix& matrix, SkRect* bbox);
void PopulateTilingPatternDict(SkPDFDict* pattern,
SkRect& bbox,
std::unique_ptr<SkPDFDict> resources,
const SkMatrix& matrix);
bool ToBitmap(const SkImage* img, SkBitmap* dst);
#ifdef SK_PDF_BASE85_BINARY
void Base85Encode(std::unique_ptr<SkStreamAsset> src, SkDynamicMemoryWStream* dst);
#endif // SK_PDF_BASE85_BINARY
void AppendTransform(const SkMatrix&, SkWStream*);
} // namespace SkPDFUtils
#endif
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