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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This test only works with the GPU backend.
#include "gm.h"
#if SK_SUPPORT_GPU
#include "GrBackendSurface.h"
#include "GrContext.h"
#include "GrGpu.h"
#include "GrTest.h"
#include "gl/GrGLContext.h"
#include "SkBitmap.h"
#include "SkGradientShader.h"
#include "SkImage.h"
namespace skiagm {
class RectangleTexture : public GM {
public:
RectangleTexture() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("rectangle_texture");
}
SkISize onISize() override {
return SkISize::Make(1035, 240);
}
void fillPixels(int width, int height, void *pixels) {
SkBitmap bmp;
bmp.setInfo(SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType), width * 4);
bmp.setPixels(pixels);
SkPaint paint;
SkCanvas canvas(bmp);
SkPoint pts[] = { {0, 0}, {0, SkIntToScalar(height)} };
SkColor colors0[] = { 0xFF1060B0 , 0xFF102030 };
paint.setShader(SkGradientShader::MakeLinear(pts, colors0, nullptr, 2,
SkShader::kClamp_TileMode));
canvas.drawPaint(paint);
SkColor colors1[] = { 0xFFA07010 , 0xFFA02080 };
paint.setAntiAlias(true);
paint.setShader(SkGradientShader::MakeLinear(pts, colors1, nullptr, 2,
SkShader::kClamp_TileMode));
canvas.drawCircle(SkIntToScalar(width) / 2, SkIntToScalar(height) / 2,
SkIntToScalar(width + height) / 5, paint);
}
sk_sp<SkImage> createRectangleTextureImg(GrContext* context, int width, int height,
void* pixels) {
if (!context) {
return nullptr;
}
GrGpu* gpu = context->getGpu();
if (!gpu) {
return nullptr;
}
const GrGLContext* glCtx = gpu->glContextForTesting();
if (!glCtx) {
return nullptr;
}
if (!(kGL_GrGLStandard == glCtx->standard() && glCtx->version() >= GR_GL_VER(3, 1)) &&
!glCtx->hasExtension("GL_ARB_texture_rectangle")) {
return nullptr;
}
// We will always create the GL texture as GL_RGBA, however the pixels uploaded may be
// be RGBA or BGRA, depending on how SkPMColor was compiled.
GrGLenum format;
if (kSkia8888_GrPixelConfig == kBGRA_8888_GrPixelConfig) {
format = GR_GL_BGRA;
} else {
SkASSERT(kSkia8888_GrPixelConfig == kRGBA_8888_GrPixelConfig);
format = GR_GL_RGBA;
}
const GrGLInterface* gl = glCtx->interface();
// Useful for debugging whether errors result from use of RECTANGLE
// #define TARGET GR_GL_TEXTURE_2D
#define TARGET GR_GL_TEXTURE_RECTANGLE
GrGLuint id = 0;
GR_GL_CALL(gl, GenTextures(1, &id));
GR_GL_CALL(gl, BindTexture(TARGET, id));
GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MAG_FILTER,
GR_GL_NEAREST));
GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_MIN_FILTER,
GR_GL_NEAREST));
GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_S,
GR_GL_CLAMP_TO_EDGE));
GR_GL_CALL(gl, TexParameteri(TARGET, GR_GL_TEXTURE_WRAP_T,
GR_GL_CLAMP_TO_EDGE));
GR_GL_CALL(gl, TexImage2D(TARGET, 0, GR_GL_RGBA, width, height, 0,
format, GR_GL_UNSIGNED_BYTE, pixels));
context->resetContext();
GrGLTextureInfo info;
info.fID = id;
info.fTarget = TARGET;
GrBackendTexture rectangleTex(width, height, kRGBA_8888_GrPixelConfig, info);
if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex,
kTopLeft_GrSurfaceOrigin)) {
return image;
}
GR_GL_CALL(gl, DeleteTextures(1, &id));
return nullptr;
}
void onDraw(SkCanvas* canvas) override {
GrContext *context = canvas->getGrContext();
if (!context) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
constexpr int kWidth = 50;
constexpr int kHeight = 50;
constexpr SkScalar kPad = 5.f;
SkPMColor pixels[kWidth * kHeight];
this->fillPixels(kWidth, kHeight, pixels);
sk_sp<SkImage> rectImg(this->createRectangleTextureImg(context, kWidth, kHeight, pixels));
if (!rectImg) {
SkPaint paint;
paint.setAntiAlias(true);
const char* kMsg = "Could not create rectangle texture image.";
canvas->drawString(kMsg, 10, 100, paint);
return;
}
constexpr SkFilterQuality kQualities[] = {
kNone_SkFilterQuality,
kLow_SkFilterQuality,
kMedium_SkFilterQuality,
kHigh_SkFilterQuality,
};
constexpr SkScalar kScales[] = { 1.0f, 1.2f, 0.75f };
canvas->translate(kPad, kPad);
for (auto s : kScales) {
canvas->save();
canvas->scale(s, s);
for (auto q : kQualities) {
SkPaint plainPaint;
plainPaint.setFilterQuality(q);
canvas->drawImage(rectImg.get(), 0, 0, &plainPaint);
canvas->translate(kWidth + kPad, 0);
SkPaint clampPaint;
clampPaint.setFilterQuality(q);
clampPaint.setShader(rectImg->makeShader());
canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), clampPaint);
canvas->translate(kWidth * 1.5f + kPad, 0);
SkPaint repeatPaint;
repeatPaint.setFilterQuality(q);
repeatPaint.setShader(rectImg->makeShader(SkShader::kRepeat_TileMode,
SkShader::kMirror_TileMode));
canvas->drawRect(SkRect::MakeWH(1.5f * kWidth, 1.5f * kHeight), repeatPaint);
canvas->translate(1.5f * kWidth + kPad, 0);
}
canvas->restore();
canvas->translate(0, kPad + 1.5f * kHeight * s);
}
}
private:
typedef GM INHERITED;
};
DEF_GM(return new RectangleTexture;)
}
#endif
|
