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 #include "SkCanvas.h"
8 #include "SkDocument.h"
9 #include "SkStream.h"
10 #include "Test.h"
11
run_test(SkWStream * out,SkXfermode::Mode mode,U8CPU alpha)12 static void run_test(SkWStream* out, SkXfermode::Mode mode, U8CPU alpha) {
13 SkAutoTUnref<SkDocument> pdfDoc(SkDocument::CreatePDF(out));
14 SkCanvas* c = pdfDoc->beginPage(612.0f, 792.0f);
15 SkPaint black;
16 SkPaint background;
17 background.setColor(SK_ColorWHITE);
18 background.setAlpha(alpha);
19 background.setXfermodeMode(mode);
20 c->drawRect(SkRect::MakeWH(612.0f, 792.0f), background);
21 c->drawRect(SkRect::MakeXYWH(36.0f, 36.0f, 9.0f, 9.0f), black);
22 c->drawRect(SkRect::MakeXYWH(72.0f, 72.0f, 468.0f, 648.0f), background);
23 c->drawRect(SkRect::MakeXYWH(108.0f, 108.0f, 9.0f, 9.0f), black);
24 pdfDoc->close();
25 }
26
27 // http://crbug.com/473572
DEF_TEST(SkPDF_OpaqueSrcModeToSrcOver,r)28 DEF_TEST(SkPDF_OpaqueSrcModeToSrcOver, r) {
29 REQUIRE_PDF_DOCUMENT(SkPDF_OpaqueSrcModeToSrcOver, r);
30 SkDynamicMemoryWStream srcMode;
31 SkDynamicMemoryWStream srcOverMode;
32
33 U8CPU alpha = SK_AlphaOPAQUE;
34 run_test(&srcMode, SkXfermode::kSrc_Mode, alpha);
35 run_test(&srcOverMode, SkXfermode::kSrcOver_Mode, alpha);
36 REPORTER_ASSERT(r, srcMode.getOffset() == srcOverMode.getOffset());
37 // The two PDFs should be equal because they have an opaque alpha.
38
39 srcMode.reset();
40 srcOverMode.reset();
41
42 alpha = 0x80;
43 run_test(&srcMode, SkXfermode::kSrc_Mode, alpha);
44 run_test(&srcOverMode, SkXfermode::kSrcOver_Mode, alpha);
45 REPORTER_ASSERT(r, srcMode.getOffset() > srcOverMode.getOffset());
46 // The two PDFs should not be equal because they have a non-opaque alpha.
47 }
48