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