|
|
// Copyright 2019 Google LLC.
|
|
|
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
|
|
|
#include "tools/fiddle/examples.h"
|
|
|
REG_FIDDLE(PDF, 256, 256, true, 0) {
|
|
|
|
|
|
// Here is an example of using Skia’s PDF backend (SkPDF) via the SkDocument
|
|
|
// and SkCanvas APIs.
|
|
|
void WritePDF(SkWStream* outputStream,
|
|
|
const char* documentTitle,
|
|
|
void (*writePage)(SkCanvas*, int page),
|
|
|
int numberOfPages,
|
|
|
SkSize pageSize) {
|
|
|
SkPDF::Metadata metadata;
|
|
|
metadata.fTitle = documentTitle;
|
|
|
metadata.fCreator = "Example WritePDF() Function";
|
|
|
metadata.fCreation = {0, 2019, 1, 4, 31, 12, 34, 56};
|
|
|
metadata.fModified = {0, 2019, 1, 4, 31, 12, 34, 56};
|
|
|
auto pdfDocument = SkPDF::MakeDocument(outputStream, metadata);
|
|
|
SkASSERT(pdfDocument);
|
|
|
for (int page = 0; page < numberOfPages; ++page) {
|
|
|
SkCanvas* pageCanvas = pdfDocument->beginPage(pageSize.width(),
|
|
|
pageSize.height());
|
|
|
writePage(pageCanvas, page);
|
|
|
pdfDocument->endPage();
|
|
|
}
|
|
|
pdfDocument->close();
|
|
|
}
|
|
|
|
|
|
// Print binary data to stdout as hex.
|
|
|
void print_data(const SkData* data, const char* name) {
|
|
|
if (data) {
|
|
|
SkDebugf("\nxxd -r -p > %s << EOF", name);
|
|
|
size_t s = data->size();
|
|
|
const uint8_t* d = data->bytes();
|
|
|
for (size_t i = 0; i < s; ++i) {
|
|
|
if (i % 40 == 0) { SkDebugf("\n"); }
|
|
|
SkDebugf("%02x", d[i]);
|
|
|
}
|
|
|
SkDebugf("\nEOF\n\n");
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// example function that draws on a SkCanvas.
|
|
|
void write_page(SkCanvas* canvas, int) {
|
|
|
const SkScalar R = 115.2f, C = 128.0f;
|
|
|
SkPath path;
|
|
|
path.moveTo(C + R, C);
|
|
|
for (int i = 1; i < 8; ++i) {
|
|
|
SkScalar a = 2.6927937f * i;
|
|
|
path.lineTo(C + R * cos(a), C + R * sin(a));
|
|
|
}
|
|
|
SkPaint paint;
|
|
|
paint.setStyle(SkPaint::kStroke_Style);
|
|
|
canvas->drawPath(path, paint);
|
|
|
}
|
|
|
|
|
|
void draw(SkCanvas*) {
|
|
|
constexpr SkSize ansiLetterSize{8.5f * 72, 11.0f * 72};
|
|
|
SkDynamicMemoryWStream buffer;
|
|
|
WritePDF(&buffer, "SkPDF Example", &write_page, 1, ansiLetterSize);
|
|
|
sk_sp<SkData> pdfData = buffer.detachAsData();
|
|
|
print_data(pdfData.get(), "skpdf_example.pdf");
|
|
|
}
|
|
|
} // END FIDDLE
|
