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 "SkBlitter.h"
9 #include "SkColor.h"
10 #include "SkMask.h"
11 #include "SkRect.h"
12 #include "SkTypes.h"
13 #include "Test.h"
14
15 #include <string.h>
16
17 class TestBlitter : public SkBlitter {
18 public:
TestBlitter(SkIRect bounds,skiatest::Reporter * reporter)19 TestBlitter(SkIRect bounds, skiatest::Reporter* reporter)
20 : fBounds(bounds)
21 , fReporter(reporter) { }
22
blitH(int x,int y,int width)23 void blitH(int x, int y, int width) override {
24
25 REPORTER_ASSERT(fReporter, x >= fBounds.fLeft && x < fBounds.fRight);
26 REPORTER_ASSERT(fReporter, y >= fBounds.fTop && y < fBounds.fBottom);
27 int right = x + width;
28 REPORTER_ASSERT(fReporter, right > fBounds.fLeft && right <= fBounds.fRight);
29 }
30
blitAntiH(int x,int y,const SkAlpha antialias[],const int16_t runs[])31 void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override {
32 SkDEBUGFAIL("blitAntiH not implemented");
33 }
34
35 private:
36 SkIRect fBounds;
37 skiatest::Reporter* fReporter;
38 };
39
40 // Exercise all clips compared with different widths of bitMask. Make sure that no buffer
41 // overruns happen.
DEF_TEST(BlitAndClip,reporter)42 DEF_TEST(BlitAndClip, reporter) {
43 const int originX = 100;
44 const int originY = 100;
45 for (int width = 1; width <= 32; width++) {
46 const int height = 2;
47 int rowBytes = (width + 7) >> 3;
48 uint8_t* bits = new uint8_t[rowBytes * height];
49 memset(bits, 0xAA, rowBytes * height);
50
51 SkIRect b = {originX, originY, originX + width, originY + height};
52
53 SkMask mask;
54 mask.fFormat = SkMask::kBW_Format;
55 mask.fBounds = b;
56 mask.fImage = (uint8_t*)bits;
57 mask.fRowBytes = rowBytes;
58
59 TestBlitter tb(mask.fBounds, reporter);
60
61 for (int top = b.fTop; top < b.fBottom; top++) {
62 for (int bottom = top + 1; bottom <= b.fBottom; bottom++) {
63 for (int left = b.fLeft; left < b.fRight; left++) {
64 for (int right = left + 1; right <= b.fRight; right++) {
65 SkIRect clipRect = {left, top, right, bottom};
66 tb.blitMask(mask, clipRect);
67 }
68 }
69 }
70 }
71
72 delete [] bits;
73 }
74 }
75