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