1 /*
2 * Copyright 2015 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
8 // c++ --std=c++11 coreGraphicsPdf2png.cpp -o coreGraphicsPdf2png -framework ApplicationServices
9
10 #include <cstdio>
11 #include <memory>
12
13 #include <ApplicationServices/ApplicationServices.h>
14
15 #define ASSERT(x) \
16 do { \
17 if (!(x)) { \
18 fprintf(stderr, "ERROR: " __FILE__ \
19 ":%d (%s)\n", __LINE__, #x); \
20 return 1; \
21 } \
22 } while (false) \
23
24 const int PAGE = 1;
25
main(int argc,char ** argv)26 int main(int argc, char** argv) {
27 if (argc <= 1 || !*(argv[1]) || 0 == strcmp(argv[1], "-")) {
28 fprintf(stderr, "usage:\n\t%s INPUT_PDF_FILE_PATH [OUTPUT_PNG_PATH]\n", argv[0]);
29 return 1;
30 }
31 const char* output = argc > 2 ? argv[2] : nullptr;
32 CGDataProviderRef data = CGDataProviderCreateWithFilename(argv[1]);
33 ASSERT(data);
34 CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(data);
35 CGDataProviderRelease(data);
36 ASSERT(pdf);
37 CGPDFPageRef page = CGPDFDocumentGetPage(pdf, PAGE);
38 ASSERT(page);
39 CGRect bounds = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
40 int w = (int)CGRectGetWidth(bounds);
41 int h = (int)CGRectGetHeight(bounds);
42 CGBitmapInfo info = kCGBitmapByteOrder32Big | kCGImageAlphaPremultipliedLast;
43 CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB();
44 ASSERT(cs);
45 std::unique_ptr<uint32_t[]> bitmap(new uint32_t[w * h]);
46 memset(bitmap.get(), 0xFF, 4 * w * h);
47 CGContextRef ctx = CGBitmapContextCreate(bitmap.get(), w, h, 8, w * 4, cs, info);
48 ASSERT(ctx);
49 CGContextDrawPDFPage(ctx, page);
50 CGPDFDocumentRelease(pdf);
51 CGImageRef image = CGBitmapContextCreateImage(ctx);
52 ASSERT(image);
53 CGDataConsumerCallbacks procs;
54 procs.putBytes = [](void* f, const void* buf, size_t s) {
55 return fwrite(buf, 1, s, (FILE*)f);
56 };
57 procs.releaseConsumer = [](void* info) { fclose((FILE*)info); };
58 FILE* ofile = (!output || !output[0] || 0 == strcmp(output, "-"))
59 ? stdout : fopen(output, "wb");
60 ASSERT(ofile);
61 CGDataConsumerRef consumer = CGDataConsumerCreate(ofile, &procs);
62 ASSERT(consumer);
63 CGImageDestinationRef dst =
64 CGImageDestinationCreateWithDataConsumer(consumer, kUTTypePNG, 1, nullptr);
65 CFRelease(consumer);
66 ASSERT(dst);
67 CGImageDestinationAddImage(dst, image, nullptr);
68 ASSERT(CGImageDestinationFinalize(dst));
69 CFRelease(dst);
70 CGImageRelease(image);
71 CGColorSpaceRelease(cs);
72 CGContextRelease(ctx);
73 return 0;
74 }
75
76
77