1 /*
2 * Copyright 2020 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 "include/core/SkTypes.h" // IWYU pragma: keep
9
10 #if !defined(SK_BUILD_FOR_GOOGLE3) // Google3 doesn't have etc1.h
11
12 #include "gm/gm.h"
13 #include "include/core/SkBitmap.h"
14 #include "include/core/SkCanvas.h"
15 #include "include/core/SkColor.h"
16 #include "include/core/SkData.h"
17 #include "include/core/SkImage.h"
18 #include "include/core/SkImageInfo.h"
19 #include "include/core/SkPath.h"
20 #include "include/core/SkRect.h"
21 #include "include/core/SkRefCnt.h"
22 #include "include/core/SkSize.h"
23 #include "include/core/SkString.h"
24 #include "include/gpu/GrDirectContext.h"
25 #include "include/gpu/GrRecordingContext.h"
26 #include "src/core/SkCompressedDataUtils.h"
27 #include "src/core/SkMipmap.h"
28 #include "src/gpu/GrDataUtils.h"
29 #include "src/gpu/GrImageContextPriv.h"
30 #include "src/gpu/GrRecordingContextPriv.h"
31 #include "src/image/SkImage_Base.h"
32 #include "src/image/SkImage_GpuBase.h"
33 #include "third_party/etc1/etc1.h"
34 #include "tools/gpu/ProxyUtils.h"
35
gen_pt(float angle,const SkVector & scale)36 static SkPoint gen_pt(float angle, const SkVector& scale) {
37 SkScalar s = SkScalarSin(angle);
38 SkScalar c = SkScalarCos(angle);
39
40 return { scale.fX * c, scale.fY * s };
41 }
42
43 // The resulting path will be centered at (0,0) and its size will match 'dimensions'
make_gear(SkISize dimensions,int numTeeth)44 static SkPath make_gear(SkISize dimensions, int numTeeth) {
45 SkVector outerRad{ dimensions.fWidth / 2.0f, dimensions.fHeight / 2.0f };
46 SkVector innerRad{ dimensions.fWidth / 2.5f, dimensions.fHeight / 2.5f };
47 const float kAnglePerTooth = 2.0f * SK_ScalarPI / (3 * numTeeth);
48
49 float angle = 0.0f;
50
51 SkPath tmp;
52 tmp.setFillType(SkPathFillType::kWinding);
53
54 tmp.moveTo(gen_pt(angle, outerRad));
55
56 for (int i = 0; i < numTeeth; ++i, angle += 3*kAnglePerTooth) {
57 tmp.lineTo(gen_pt(angle+kAnglePerTooth, outerRad));
58 tmp.lineTo(gen_pt(angle+(1.5f*kAnglePerTooth), innerRad));
59 tmp.lineTo(gen_pt(angle+(2.5f*kAnglePerTooth), innerRad));
60 tmp.lineTo(gen_pt(angle+(3.0f*kAnglePerTooth), outerRad));
61 }
62
63 tmp.close();
64
65 float fInnerRad = 0.1f * std::min(dimensions.fWidth, dimensions.fHeight);
66 if (fInnerRad > 0.5f) {
67 tmp.addCircle(0.0f, 0.0f, fInnerRad, SkPathDirection::kCCW);
68 }
69
70 return tmp;
71 }
72
73 // Render one level of a mipmap
render_level(SkISize dimensions,SkColor color,SkColorType colorType,bool opaque)74 SkBitmap render_level(SkISize dimensions, SkColor color, SkColorType colorType, bool opaque) {
75 SkPath path = make_gear(dimensions, 9);
76
77 SkImageInfo ii = SkImageInfo::Make(dimensions.width(), dimensions.height(),
78 colorType, opaque ? kOpaque_SkAlphaType
79 : kPremul_SkAlphaType);
80 SkBitmap bm;
81 bm.allocPixels(ii);
82
83 bm.eraseColor(opaque ? SK_ColorBLACK : SK_ColorTRANSPARENT);
84
85 SkCanvas c(bm);
86
87 SkPaint paint;
88 paint.setColor(color | 0xFF000000);
89 paint.setAntiAlias(false);
90
91 c.translate(dimensions.width() / 2.0f, dimensions.height() / 2.0f);
92 c.drawPath(path, paint);
93
94 return bm;
95 }
96
97 // Create the compressed data blob needed to represent a mipmapped 2-color texture of the specified
98 // compression format. In this case 2-color means either opaque black or transparent black plus
99 // one other color.
100 // Note that ETC1/ETC2_RGB8_UNORM only supports 565 opaque textures.
make_compressed_image(GrDirectContext * dContext,const SkISize dimensions,SkColorType colorType,bool opaque,SkImage::CompressionType compression)101 static sk_sp<SkImage> make_compressed_image(GrDirectContext* dContext,
102 const SkISize dimensions,
103 SkColorType colorType,
104 bool opaque,
105 SkImage::CompressionType compression) {
106 size_t totalSize = SkCompressedDataSize(compression, dimensions, nullptr, true);
107
108 sk_sp<SkData> tmp = SkData::MakeUninitialized(totalSize);
109 char* pixels = (char*) tmp->writable_data();
110
111 int numMipLevels = SkMipmap::ComputeLevelCount(dimensions.width(), dimensions.height()) + 1;
112
113 size_t offset = 0;
114
115 // Use a different color for each mipmap level so we can visually evaluate the draws
116 static const SkColor kColors[] = {
117 SK_ColorRED,
118 SK_ColorGREEN,
119 SK_ColorBLUE,
120 SK_ColorCYAN,
121 SK_ColorMAGENTA,
122 SK_ColorYELLOW,
123 SK_ColorWHITE,
124 };
125
126 SkISize levelDims = dimensions;
127 for (int i = 0; i < numMipLevels; ++i) {
128 size_t levelSize = SkCompressedDataSize(compression, levelDims, nullptr, false);
129
130 SkBitmap bm = render_level(levelDims, kColors[i%7], colorType, opaque);
131 if (compression == SkImage::CompressionType::kETC2_RGB8_UNORM) {
132 SkASSERT(bm.colorType() == kRGB_565_SkColorType);
133 SkASSERT(opaque);
134
135 if (etc1_encode_image((unsigned char*)bm.getAddr16(0, 0),
136 bm.width(), bm.height(), 2, bm.rowBytes(),
137 (unsigned char*) &pixels[offset])) {
138 return nullptr;
139 }
140 } else {
141 GrTwoColorBC1Compress(bm.pixmap(), kColors[i%7], &pixels[offset]);
142 }
143
144 offset += levelSize;
145 levelDims = {std::max(1, levelDims.width()/2), std::max(1, levelDims.height()/2)};
146 }
147
148 sk_sp<SkImage> image;
149 if (dContext) {
150 image = SkImage::MakeTextureFromCompressed(dContext, std::move(tmp),
151 dimensions.width(),
152 dimensions.height(),
153 compression, GrMipmapped::kYes);
154 } else {
155 image = SkImage::MakeRasterFromCompressed(std::move(tmp),
156 dimensions.width(),
157 dimensions.height(),
158 compression);
159 }
160 return image;
161 }
162
163 // Basic test of Ganesh's ETC1 and BC1 support
164 // The layout is:
165 // ETC2 BC1
166 // --------------------------------------
167 // RGB8 | kETC2_RGB8_UNORM | kBC1_RGB8_UNORM |
168 // |--------------------------------------|
169 // RGBA8 | | kBC1_RGBA8_UNORM |
170 // --------------------------------------
171 //
172 // The nonPowerOfTwo and nonMultipleOfFour cases exercise some compression edge cases.
173 class CompressedTexturesGM : public skiagm::GM {
174 public:
175 enum class Type {
176 kNormal,
177 kNonPowerOfTwo,
178 kNonMultipleOfFour
179 };
180
CompressedTexturesGM(Type type)181 CompressedTexturesGM(Type type) : fType(type) {
182 this->setBGColor(0xFFCCCCCC);
183
184 switch (fType) {
185 case Type::kNonPowerOfTwo:
186 // These dimensions force the top two mip levels to be 1x3 and 1x1
187 fImgDimensions.set(20, 60);
188 break;
189 case Type::kNonMultipleOfFour:
190 // These dimensions force the top three mip levels to be 1x7, 1x3 and 1x1
191 fImgDimensions.set(13, 61); // prime numbers - just bc
192 break;
193 default:
194 fImgDimensions.set(kBaseTexWidth, kBaseTexHeight);
195 break;
196 }
197
198 }
199
200 protected:
onShortName()201 SkString onShortName() override {
202 SkString name("compressed_textures");
203
204 if (fType == Type::kNonPowerOfTwo) {
205 name.append("_npot");
206 } else if (fType == Type::kNonMultipleOfFour) {
207 name.append("_nmof");
208 }
209
210 return name;
211 }
212
onISize()213 SkISize onISize() override {
214 return SkISize::Make(2*kCellWidth + 3*kPad, 2*kBaseTexHeight + 3*kPad);
215 }
216
onGpuSetup(GrDirectContext * dContext,SkString * errorMsg)217 DrawResult onGpuSetup(GrDirectContext* dContext, SkString* errorMsg) override {
218 if (dContext && dContext->abandoned()) {
219 // This isn't a GpuGM so a null 'context' is okay but an abandoned context
220 // if forbidden.
221 return DrawResult::kSkip;
222 }
223
224 if (dContext &&
225 dContext->backend() == GrBackendApi::kDirect3D && fType == Type::kNonMultipleOfFour) {
226 // skbug.com/10541 - Are non-multiple-of-four BC1 textures supported in D3D?
227 return DrawResult::kSkip;
228 }
229
230 fOpaqueETC2Image = make_compressed_image(dContext, fImgDimensions,
231 kRGB_565_SkColorType, true,
232 SkImage::CompressionType::kETC2_RGB8_UNORM);
233
234 fOpaqueBC1Image = make_compressed_image(dContext, fImgDimensions,
235 kRGBA_8888_SkColorType, true,
236 SkImage::CompressionType::kBC1_RGB8_UNORM);
237
238 fTransparentBC1Image = make_compressed_image(dContext, fImgDimensions,
239 kRGBA_8888_SkColorType, false,
240 SkImage::CompressionType::kBC1_RGBA8_UNORM);
241
242 if (!fOpaqueETC2Image || !fOpaqueBC1Image || !fTransparentBC1Image) {
243 *errorMsg = "Failed to create compressed images.";
244 return DrawResult::kFail;
245 }
246
247 return DrawResult::kOk;
248 }
249
onGpuTeardown()250 void onGpuTeardown() override {
251 fOpaqueETC2Image = nullptr;
252 fOpaqueBC1Image = nullptr;
253 fTransparentBC1Image = nullptr;
254 }
255
onDraw(SkCanvas * canvas)256 void onDraw(SkCanvas* canvas) override {
257 this->drawCell(canvas, fOpaqueETC2Image.get(), { kPad, kPad });
258
259 this->drawCell(canvas, fOpaqueBC1Image.get(), { 2*kPad + kCellWidth, kPad });
260
261 this->drawCell(canvas, fTransparentBC1Image.get(),
262 { 2*kPad + kCellWidth, 2*kPad + kBaseTexHeight });
263 }
264
265 private:
drawCell(SkCanvas * canvas,SkImage * image,SkIVector offset)266 void drawCell(SkCanvas* canvas, SkImage* image, SkIVector offset) {
267
268 SkISize levelDimensions = fImgDimensions;
269 int numMipLevels = SkMipmap::ComputeLevelCount(levelDimensions.width(),
270 levelDimensions.height()) + 1;
271
272 SkSamplingOptions sampling(SkCubicResampler::Mitchell());
273
274 bool isCompressed = false;
275 if (image->isTextureBacked()) {
276 const GrCaps* caps = as_IB(image)->context()->priv().caps();
277 GrTextureProxy* proxy = sk_gpu_test::GetTextureImageProxy(image,
278 canvas->recordingContext());
279 isCompressed = caps->isFormatCompressed(proxy->backendFormat());
280 }
281
282 SkPaint redStrokePaint;
283 redStrokePaint.setColor(SK_ColorRED);
284 redStrokePaint.setStyle(SkPaint::kStroke_Style);
285
286 for (int i = 0; i < numMipLevels; ++i) {
287 SkRect r = SkRect::MakeXYWH(offset.fX, offset.fY,
288 levelDimensions.width(), levelDimensions.height());
289
290 canvas->drawImageRect(image, r, sampling);
291 if (!isCompressed) {
292 // Make it obvious which drawImages used decompressed images
293 canvas->drawRect(r, redStrokePaint);
294 }
295
296 if (i == 0) {
297 offset.fX += levelDimensions.width()+1;
298 } else {
299 offset.fY += levelDimensions.height()+1;
300 }
301
302 levelDimensions = {std::max(1, levelDimensions.width()/2),
303 std::max(1, levelDimensions.height()/2)};
304 }
305 }
306
307 static const int kPad = 8;
308 static const int kBaseTexWidth = 64;
309 static const int kCellWidth = 1.5f * kBaseTexWidth;
310 static const int kBaseTexHeight = 64;
311
312 Type fType;
313 SkISize fImgDimensions;
314
315 sk_sp<SkImage> fOpaqueETC2Image;
316 sk_sp<SkImage> fOpaqueBC1Image;
317 sk_sp<SkImage> fTransparentBC1Image;
318
319 using INHERITED = GM;
320 };
321
322 //////////////////////////////////////////////////////////////////////////////
323
324 DEF_GM(return new CompressedTexturesGM(CompressedTexturesGM::Type::kNormal);)
325 DEF_GM(return new CompressedTexturesGM(CompressedTexturesGM::Type::kNonPowerOfTwo);)
326 DEF_GM(return new CompressedTexturesGM(CompressedTexturesGM::Type::kNonMultipleOfFour);)
327
328 #endif
329