1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "sk_tool_utils.h"
#include "SkBitmap.h"
#include "SkPaint.h"
#include "SkShader.h"
#include "GrContext.h"
namespace skiagm {
static void draw_bm(SkBitmap* bm) {
SkPaint bluePaint;
bluePaint.setColor(SK_ColorBLUE);
bm->allocN32Pixels(20, 20);
bm->eraseColor(SK_ColorRED);
SkCanvas canvas(*bm);
canvas.drawCircle(10, 10, 5, bluePaint);
}
static void draw_mask(SkBitmap* bm) {
SkPaint circlePaint;
circlePaint.setColor(SK_ColorBLACK);
bm->allocPixels(SkImageInfo::MakeA8(20, 20));
bm->eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(*bm);
canvas.drawCircle(10, 10, 10, circlePaint);
}
class BitmapShaderGM : public GM {
protected:
void onOnceBeforeDraw() override {
this->setBGColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
draw_bm(&fBitmap);
draw_mask(&fMask);
}
SkString onShortName() override {
return SkString("bitmapshaders");
}
SkISize onISize() override {
return SkISize::Make(150, 100);
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
for (int i = 0; i < 2; i++) {
SkMatrix s;
s.reset();
if (1 == i) {
s.setScale(1.5f, 1.5f);
s.postTranslate(2, 2);
}
canvas->save();
paint.setShader(SkShader::MakeBitmapShader(fBitmap, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode, &s));
// draw the shader with a bitmap mask
canvas->drawBitmap(fMask, 0, 0, &paint);
canvas->drawBitmap(fMask, 30, 0, &paint);
canvas->translate(0, 25);
canvas->drawCircle(10, 10, 10, paint);
canvas->drawCircle(40, 10, 10, paint); // no blue circle expected
canvas->translate(0, 25);
// clear the shader, colorized by a solid color with a bitmap mask
paint.setShader(nullptr);
paint.setColor(SK_ColorGREEN);
canvas->drawBitmap(fMask, 0, 0, &paint);
canvas->drawBitmap(fMask, 30, 0, &paint);
canvas->translate(0, 25);
paint.setShader(SkShader::MakeBitmapShader(fMask, SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode, &s));
paint.setColor(SK_ColorRED);
// draw the mask using the shader and a color
canvas->drawRect(SkRect::MakeXYWH(0, 0, 20, 20), paint);
canvas->drawRect(SkRect::MakeXYWH(30, 0, 20, 20), paint);
canvas->restore();
canvas->translate(60, 0);
}
}
private:
SkBitmap fBitmap;
SkBitmap fMask;
typedef GM INHERITED;
};
DEF_SIMPLE_GM(hugebitmapshader, canvas, 100, 100) {
SkPaint paint;
SkBitmap bitmap;
// The huge height will exceed GL_MAX_TEXTURE_SIZE. We test that the GL backend will at least
// draw something with a default paint instead of drawing nothing.
//
// (See https://skia-review.googlesource.com/c/skia/+/73200)
int bitmapW = 1;
int bitmapH = 60000;
if (auto* ctx = canvas->getGrContext()) {
bitmapH = ctx->caps()->maxTextureSize() + 1;
}
bitmap.setInfo(SkImageInfo::MakeA8(bitmapW, bitmapH), bitmapW);
uint8_t* pixels = new uint8_t[bitmapH];
for(int i = 0; i < bitmapH; ++i) {
pixels[i] = i & 0xff;
}
bitmap.setPixels(pixels);
paint.setShader(SkShader::MakeBitmapShader(bitmap,
SkShader::kMirror_TileMode, SkShader::kMirror_TileMode));
paint.setColor(SK_ColorRED);
paint.setAntiAlias(true);
canvas->drawCircle(50, 50, 50, paint);
delete [] pixels;
}
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new BitmapShaderGM; }
static GMRegistry reg(MyFactory);
}
|
