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
13static 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
29DEF_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