1 /*
2  * Copyright 2016 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 // This test only works with the GL backend.
9 
10 #include "gm/gm.h"
11 
12 #ifdef SK_GL
13 #include "include/core/SkBitmap.h"
14 #include "include/core/SkCanvas.h"
15 #include "include/core/SkColor.h"
16 #include "include/core/SkFilterQuality.h"
17 #include "include/core/SkImage.h"
18 #include "include/core/SkImageInfo.h"
19 #include "include/core/SkPaint.h"
20 #include "include/core/SkPoint.h"
21 #include "include/core/SkRect.h"
22 #include "include/core/SkRefCnt.h"
23 #include "include/core/SkScalar.h"
24 #include "include/core/SkShader.h"
25 #include "include/core/SkSize.h"
26 #include "include/core/SkString.h"
27 #include "include/core/SkTileMode.h"
28 #include "include/core/SkTypes.h"
29 #include "include/effects/SkGradientShader.h"
30 #include "include/gpu/GrBackendSurface.h"
31 #include "include/gpu/GrDirectContext.h"
32 #include "include/gpu/GrTypes.h"
33 #include "src/core/SkAutoPixmapStorage.h"
34 #include "src/gpu/GrDirectContextPriv.h"
35 #include "src/gpu/GrGpu.h"
36 #include "src/gpu/gl/GrGLCaps.h"
37 #include "src/gpu/gl/GrGLDefines.h"
38 
39 #include <algorithm>
40 #include <cstdint>
41 #include <memory>
42 
43 class GrSurfaceDrawContext;
44 
45 namespace skiagm {
46 class RectangleTexture : public GpuGM {
47 public:
RectangleTexture()48     RectangleTexture() {
49         this->setBGColor(0xFFFFFFFF);
50     }
51 
52 private:
53     enum class ImageType {
54         kGradientCircle,
55         k2x2
56     };
57 
onShortName()58     SkString onShortName() override {
59         return SkString("rectangle_texture");
60     }
61 
onISize()62     SkISize onISize() override { return SkISize::Make(1180, 710); }
63 
makeImagePixels(int size,ImageType type)64     SkBitmap makeImagePixels(int size, ImageType type) {
65         auto ii = SkImageInfo::Make(size, size, kRGBA_8888_SkColorType, kOpaque_SkAlphaType);
66         switch (type) {
67             case ImageType::kGradientCircle: {
68                 SkBitmap bmp;
69                 bmp.allocPixels(ii);
70                 SkPaint paint;
71                 SkCanvas canvas(bmp);
72                 SkPoint pts[] = {{0, 0}, {0, SkIntToScalar(size)}};
73                 SkColor colors0[] = {0xFF1060B0, 0xFF102030};
74                 paint.setShader(
75                         SkGradientShader::MakeLinear(pts, colors0, nullptr, 2, SkTileMode::kClamp));
76                 canvas.drawPaint(paint);
77                 SkColor colors1[] = {0xFFA07010, 0xFFA02080};
78                 paint.setAntiAlias(true);
79                 paint.setShader(
80                         SkGradientShader::MakeLinear(pts, colors1, nullptr, 2, SkTileMode::kClamp));
81                 canvas.drawCircle(size/2.f, size/2.f, 2.f*size/5, paint);
82                 return bmp;
83             }
84             case ImageType::k2x2: {
85                 SkBitmap bmp;
86                 bmp.allocPixels(ii);
87                 *bmp.getAddr32(0, 0) = 0xFF0000FF;
88                 *bmp.getAddr32(1, 0) = 0xFF00FF00;
89                 *bmp.getAddr32(0, 1) = 0xFFFF0000;
90                 *bmp.getAddr32(1, 1) = 0xFFFFFFFF;
91                 return bmp;
92             }
93         }
94         SkUNREACHABLE;
95     }
96 
createRectangleTextureImg(GrDirectContext * dContext,GrSurfaceOrigin origin,const SkBitmap content)97     sk_sp<SkImage> createRectangleTextureImg(GrDirectContext* dContext, GrSurfaceOrigin origin,
98                                              const SkBitmap content) {
99         SkASSERT(content.colorType() == kRGBA_8888_SkColorType);
100         auto format = GrBackendFormat::MakeGL(GR_GL_RGBA8, GR_GL_TEXTURE_RECTANGLE);
101         auto bet = dContext->createBackendTexture(content.width(), content.height(), format,
102                                                   GrMipmapped::kNo, GrRenderable::kNo);
103         if (!bet.isValid()) {
104             return nullptr;
105         }
106         if (!dContext->updateBackendTexture(bet, content.pixmap(), origin, nullptr, nullptr)) {
107             dContext->deleteBackendTexture(bet);
108         }
109         return SkImage::MakeFromAdoptedTexture(dContext, bet, origin, kRGBA_8888_SkColorType);
110     }
111 
onGpuSetup(GrDirectContext * context,SkString * errorMsg)112     DrawResult onGpuSetup(GrDirectContext* context, SkString* errorMsg) override {
113         if (!context || context->abandoned()) {
114             return DrawResult::kSkip;
115         }
116 
117         if (context->backend() != GrBackendApi::kOpenGL_GrBackend ||
118             !static_cast<const GrGLCaps*>(context->priv().caps())->rectangleTextureSupport()) {
119             *errorMsg = "This GM requires an OpenGL context that supports texture rectangles.";
120             return DrawResult::kSkip;
121         }
122 
123         auto gradCircle = this->makeImagePixels(50, ImageType::kGradientCircle);
124 
125         fGradImgs[0] = this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin,
126                                                        gradCircle);
127         fGradImgs[1] = this->createRectangleTextureImg(context, kBottomLeft_GrSurfaceOrigin,
128                                                        gradCircle);
129         SkASSERT(SkToBool(fGradImgs[0]) == SkToBool(fGradImgs[1]));
130         if (!fGradImgs[0]) {
131             *errorMsg = "Could not create gradient rectangle texture images.";
132             return DrawResult::kFail;
133         }
134 
135         fSmallImg = this->createRectangleTextureImg(context, kTopLeft_GrSurfaceOrigin,
136                                                     this->makeImagePixels(2, ImageType::k2x2));
137         if (!fSmallImg) {
138             *errorMsg = "Could not create 2x2 rectangle texture image.";
139             return DrawResult::kFail;
140         }
141 
142         return DrawResult::kOk;
143     }
144 
onGpuTeardown()145     void onGpuTeardown() override {
146         fGradImgs[0] = fGradImgs[1] = nullptr;
147         fSmallImg = nullptr;
148     }
149 
onDraw(GrRecordingContext *,GrSurfaceDrawContext *,SkCanvas * canvas,SkString *)150     DrawResult onDraw(GrRecordingContext*, GrSurfaceDrawContext*, SkCanvas* canvas,
151                       SkString*) override {
152         SkASSERT(fGradImgs[0] && fGradImgs[1] && fSmallImg);
153 
154         static constexpr SkScalar kPad = 5.f;
155 
156         const SkSamplingOptions kSamplings[] = {
157             SkSamplingOptions(SkFilterMode::kNearest),
158             SkSamplingOptions(SkFilterMode::kLinear),
159             SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear),
160             SkSamplingOptions(SkCubicResampler::Mitchell()),
161         };
162 
163         constexpr SkScalar kScales[] = {1.0f, 1.2f, 0.75f};
164 
165         canvas->translate(kPad, kPad);
166         for (size_t i = 0; i < kNumGradImages; ++i) {
167             auto img = fGradImgs[i];
168             int w = img->width();
169             int h = img->height();
170             for (auto s : kScales) {
171                 canvas->save();
172                 canvas->scale(s, s);
173                 for (auto s : kSamplings) {
174                     // drawImage
175                     canvas->drawImage(img, 0, 0, s);
176                     canvas->translate(w + kPad, 0);
177 
178                     // clamp/clamp shader
179                     SkPaint clampPaint;
180                     clampPaint.setShader(fGradImgs[i]->makeShader(s));
181                     canvas->drawRect(SkRect::MakeWH(1.5f*w, 1.5f*h), clampPaint);
182                     canvas->translate(1.5f*w + kPad, 0);
183 
184                     // repeat/mirror shader
185                     SkPaint repeatPaint;
186                     repeatPaint.setShader(fGradImgs[i]->makeShader(SkTileMode::kRepeat,
187                                                                    SkTileMode::kMirror,
188                                                                    s));
189                     canvas->drawRect(SkRect::MakeWH(1.5f*w, 1.5f*h), repeatPaint);
190                     canvas->translate(1.5f*w + kPad, 0);
191 
192                     // drawImageRect with kStrict
193                     auto srcRect = SkRect::MakeXYWH(.25f*w, .25f*h, .50f*w, .50f*h);
194                     auto dstRect = SkRect::MakeXYWH(      0,     0, .50f*w, .50f*h);
195                     canvas->drawImageRect(fGradImgs[i], srcRect, dstRect, s, nullptr,
196                                           SkCanvas::kStrict_SrcRectConstraint);
197                     canvas->translate(.5f*w + kPad, 0);
198                 }
199                 canvas->restore();
200                 canvas->translate(0, kPad + 1.5f*h*s);
201             }
202         }
203 
204         static constexpr SkScalar kOutset = 25.f;
205         canvas->translate(kOutset, kOutset);
206         auto dstRect = SkRect::Make(fSmallImg->dimensions()).makeOutset(kOutset, kOutset);
207 
208         for (int fq = kNone_SkFilterQuality; fq <= kLast_SkFilterQuality; ++fq) {
209             if (fq == kMedium_SkFilterQuality) {
210                 // Medium is the same as Low for upscaling.
211                 continue;
212             }
213             canvas->save();
214             for (int ty = 0; ty < kSkTileModeCount; ++ty) {
215                 canvas->save();
216                 for (int tx = 0; tx < kSkTileModeCount; ++tx) {
217                     SkMatrix lm;
218                     lm.setRotate(45.f, 1, 1);
219                     lm.postScale(6.5f, 6.5f);
220                     SkPaint paint;
221                     paint.setShader(fSmallImg->makeShader(static_cast<SkTileMode>(tx),
222                                                           static_cast<SkTileMode>(ty),
223                                                           SkSamplingOptions((SkFilterQuality)fq),
224                                                           lm));
225                     canvas->drawRect(dstRect, paint);
226                     canvas->translate(dstRect.width() + kPad, 0);
227                 }
228                 canvas->restore();
229                 canvas->translate(0, dstRect.height() + kPad);
230             }
231             canvas->restore();
232             canvas->translate((dstRect.width() + kPad)*kSkTileModeCount, 0);
233         }
234 
235         return DrawResult::kOk;
236     }
237 
238 private:
239     static const int kNumGradImages = 2;
240 
241     sk_sp<SkImage> fGradImgs[kNumGradImages];
242     sk_sp<SkImage> fSmallImg;
243 
244     using INHERITED = GM;
245 };
246 
247 DEF_GM(return new RectangleTexture;)
248 }  // namespace skiagm
249 #endif
250