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 #include "include/core/SkBlendMode.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkDocument.h"
12 #include "include/core/SkPaint.h"
13 #include "include/core/SkRect.h"
14 #include "include/core/SkRefCnt.h"
15 #include "include/core/SkStream.h"
16 #include "include/core/SkTypes.h"
17 #include "include/docs/SkPDFDocument.h"
18 #include "include/docs/SkPDFJpegHelpers.h"
19 #include "include/private/base/SkCPUTypes.h"
20 #include "tests/Test.h"
21
run_test(SkWStream * out,SkBlendMode mode,U8CPU alpha)22 static void run_test(SkWStream* out, SkBlendMode mode, U8CPU alpha) {
23 auto pdfDoc = SkPDF::MakeDocument(out, SkPDF::JPEG::MetadataWithCallbacks());
24 SkCanvas* c = pdfDoc->beginPage(612.0f, 792.0f);
25 SkPaint black;
26 SkPaint background;
27 background.setColor(SK_ColorWHITE);
28 background.setAlpha(alpha);
29 background.setBlendMode(mode);
30 c->drawRect(SkRect::MakeWH(612.0f, 792.0f), background);
31 c->drawRect(SkRect::MakeXYWH(36.0f, 36.0f, 9.0f, 9.0f), black);
32 c->drawRect(SkRect::MakeXYWH(72.0f, 72.0f, 468.0f, 648.0f), background);
33 c->drawRect(SkRect::MakeXYWH(108.0f, 108.0f, 9.0f, 9.0f), black);
34 pdfDoc->close();
35 }
36
37 // http://crbug.com/473572
DEF_TEST(SkPDF_OpaqueSrcModeToSrcOver,r)38 DEF_TEST(SkPDF_OpaqueSrcModeToSrcOver, r) {
39 REQUIRE_PDF_DOCUMENT(SkPDF_OpaqueSrcModeToSrcOver, r);
40 SkDynamicMemoryWStream srcMode;
41 SkDynamicMemoryWStream srcOverMode;
42
43 U8CPU alpha = SK_AlphaOPAQUE;
44 run_test(&srcMode, SkBlendMode::kSrc, alpha);
45 run_test(&srcOverMode, SkBlendMode::kSrcOver, alpha);
46 REPORTER_ASSERT(r, srcMode.bytesWritten() == srcOverMode.bytesWritten());
47 // The two PDFs should be equal because they have an opaque alpha.
48
49 srcMode.reset();
50 srcOverMode.reset();
51
52 alpha = 0x80;
53 run_test(&srcMode, SkBlendMode::kSrc, alpha);
54 run_test(&srcOverMode, SkBlendMode::kSrcOver, alpha);
55 REPORTER_ASSERT(r, srcMode.bytesWritten() > srcOverMode.bytesWritten());
56 // The two PDFs should not be equal because they have a non-opaque alpha.
57 }
58