RecordDrawTest.cpp revision 0a98d870448f66ea0df7c37a47b38cf2d3b734e5 
1/*
2 * Copyright 2014 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 "Test.h"
9#include "RecordTestUtils.h"
10
11#include "SkDebugCanvas.h"
12#include "SkRecord.h"
13#include "SkRecordOpts.h"
14#include "SkRecordDraw.h"
15#include "SkRecorder.h"
16#include "SkRecords.h"
17
18static const int W = 1920, H = 1080;
19
20static void draw_pos_text_h(SkCanvas* canvas, const char* text, SkScalar y) {
21    const size_t len = strlen(text);
22    SkAutoTMalloc<SkScalar> xpos(len);
23    for (size_t i = 0; i < len; i++) {
24        xpos[i] = (SkScalar)i;
25    }
26    canvas->drawPosTextH(text, len, xpos, y, SkPaint());
27}
28
29// Rerecord into another SkRecord using full SkCanvas semantics,
30// tracking clips and allowing SkRecordDraw's quickReject() calls to work.
31static void record_clipped(const SkRecord& record, SkRect clip, SkRecord* clipped) {
32    SkRecorder recorder(SkRecorder::kReadWrite_Mode, clipped, W, H);
33    recorder.clipRect(clip);
34    SkRecordDraw(record, &recorder);
35}
36
37DEF_TEST(RecordDraw_PosTextHQuickReject, r) {
38    SkRecord record;
39    SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
40
41    draw_pos_text_h(&recorder, "This will draw.", 20);
42    draw_pos_text_h(&recorder, "This won't.", 5000);
43
44    SkRecordBoundDrawPosTextH(&record);
45
46    SkRecord clipped;
47    record_clipped(record, SkRect::MakeLTRB(20, 20, 200, 200), &clipped);
48
49    // clipRect and the first drawPosTextH.
50    REPORTER_ASSERT(r, 2 == clipped.count());
51}
52
53DEF_TEST(RecordDraw_Culling, r) {
54    // Record these 7 drawing commands verbatim.
55    SkRecord record;
56    SkRecorder recorder(SkRecorder::kWriteOnly_Mode, &record, W, H);
57
58    recorder.pushCull(SkRect::MakeWH(100, 100));
59        recorder.drawRect(SkRect::MakeWH(10, 10), SkPaint());
60        recorder.drawRect(SkRect::MakeWH(30, 30), SkPaint());
61        recorder.pushCull(SkRect::MakeWH(5, 5));
62            recorder.drawRect(SkRect::MakeWH(1, 1), SkPaint());
63        recorder.popCull();
64    recorder.popCull();
65
66    // Take a pass over to match up pushCulls and popCulls.
67    SkRecordAnnotateCullingPairs(&record);
68
69    // This clip intersects the outer cull, but allows us to quick reject the inner one.
70    SkRecord clipped;
71    record_clipped(record, SkRect::MakeLTRB(20, 20, 200, 200), &clipped);
72
73    // We'll keep the clipRect call from above, and the outer two drawRects, and the push/pop pair.
74    // If culling weren't working, we'd see 8 commands recorded here.
75    REPORTER_ASSERT(r, 5 == clipped.count());
76}
77
78DEF_TEST(RecordDraw_SetMatrixClobber, r) {
79    // Set up an SkRecord that just scales by 2x,3x.
80    SkRecord scaleRecord;
81    SkRecorder scaleCanvas(SkRecorder::kReadWrite_Mode, &scaleRecord, W, H);
82    SkMatrix scale;
83    scale.setScale(2, 3);
84    scaleCanvas.setMatrix(scale);
85
86    // Set up an SkRecord with an initial +20, +20 translate.
87    SkRecord translateRecord;
88    SkRecorder translateCanvas(SkRecorder::kReadWrite_Mode, &translateRecord, W, H);
89    SkMatrix translate;
90    translate.setTranslate(20, 20);
91    translateCanvas.setMatrix(translate);
92
93    SkRecordDraw(scaleRecord, &translateCanvas);
94
95    // When we look at translateRecord now, it should have its first +20,+20 translate,
96    // then a 2x,3x scale that's been concatted with that +20,+20 translate.
97    const SkRecords::SetMatrix* setMatrix;
98    setMatrix = assert_type<SkRecords::SetMatrix>(r, translateRecord, 0);
99    REPORTER_ASSERT(r, setMatrix->matrix == translate);
100
101    setMatrix = assert_type<SkRecords::SetMatrix>(r, translateRecord, 1);
102    SkMatrix expected = scale;
103    expected.postConcat(translate);
104    REPORTER_ASSERT(r, setMatrix->matrix == expected);
105}
106