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1 /* | 1 /* |
2 * Copyright 2011 Google Inc. | 2 * Copyright 2011 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "gm.h" | 8 #include "gm.h" |
9 #include "SkData.h" | 9 #include "SkData.h" |
10 #include "SkCanvas.h" | 10 #include "SkCanvas.h" |
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233 } | 233 } |
234 } | 234 } |
235 | 235 |
236 static void draw_contents(SkCanvas* canvas) { | 236 static void draw_contents(SkCanvas* canvas) { |
237 SkPaint paint; | 237 SkPaint paint; |
238 paint.setStyle(SkPaint::kStroke_Style); | 238 paint.setStyle(SkPaint::kStroke_Style); |
239 paint.setStrokeWidth(20); | 239 paint.setStrokeWidth(20); |
240 canvas->drawCircle(50, 50, 35, paint); | 240 canvas->drawCircle(50, 50, 35, paint); |
241 } | 241 } |
242 | 242 |
243 static SkImage* make_raster(const SkImageInfo& info, GrContext*) { | 243 static SkImage* make_raster(const SkImageInfo& info, GrContext*, void (*draw)(Sk
Canvas*)) { |
244 SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info)); | 244 SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info)); |
245 draw_contents(surface->getCanvas()); | 245 draw(surface->getCanvas()); |
246 return surface->newImageSnapshot(); | 246 return surface->newImageSnapshot(); |
247 } | 247 } |
248 | 248 |
249 static SkImage* make_picture(const SkImageInfo& info, GrContext*) { | 249 static SkImage* make_picture(const SkImageInfo& info, GrContext*, void (*draw)(S
kCanvas*)) { |
250 SkPictureRecorder recorder; | 250 SkPictureRecorder recorder; |
251 draw_contents(recorder.beginRecording(SkRect::MakeIWH(info.width(), info.hei
ght()))); | 251 draw(recorder.beginRecording(SkRect::MakeIWH(info.width(), info.height()))); |
252 SkAutoTUnref<SkPicture> pict(recorder.endRecording()); | 252 SkAutoTUnref<SkPicture> pict(recorder.endRecording()); |
253 return SkImage::NewFromPicture(pict, info.dimensions(), nullptr, nullptr); | 253 return SkImage::NewFromPicture(pict, info.dimensions(), nullptr, nullptr); |
254 } | 254 } |
255 | 255 |
256 static SkImage* make_codec(const SkImageInfo& info, GrContext*) { | 256 static SkImage* make_codec(const SkImageInfo& info, GrContext*, void (*draw)(SkC
anvas*)) { |
257 SkAutoTUnref<SkImage> image(make_raster(info, nullptr)); | 257 SkAutoTUnref<SkImage> image(make_raster(info, nullptr, draw)); |
258 SkAutoTUnref<SkData> data(image->encode()); | 258 SkAutoTUnref<SkData> data(image->encode()); |
259 return SkImage::NewFromEncoded(data); | 259 return SkImage::NewFromEncoded(data); |
260 } | 260 } |
261 | 261 |
262 static SkImage* make_gpu(const SkImageInfo& info, GrContext* ctx) { | 262 static SkImage* make_gpu(const SkImageInfo& info, GrContext* ctx, void (*draw)(S
kCanvas*)) { |
263 if (!ctx) { return nullptr; } | 263 if (!ctx) { return nullptr; } |
264 SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkSurface::k
No_Budgeted, info)); | 264 SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(ctx, SkSurface::k
No_Budgeted, info)); |
265 draw_contents(surface->getCanvas()); | 265 draw(surface->getCanvas()); |
266 return surface->newImageSnapshot(); | 266 return surface->newImageSnapshot(); |
267 } | 267 } |
268 | 268 |
269 typedef SkImage* (*ImageMakerProc)(const SkImageInfo&, GrContext*); | 269 typedef SkImage* (*ImageMakerProc)(const SkImageInfo&, GrContext*, void (*)(SkCa
nvas*)); |
270 | 270 |
271 class ScalePixelsGM : public skiagm::GM { | 271 class ScalePixelsGM : public skiagm::GM { |
272 public: | 272 public: |
273 ScalePixelsGM() {} | 273 ScalePixelsGM() {} |
274 | 274 |
275 protected: | 275 protected: |
276 SkString onShortName() override { | 276 SkString onShortName() override { |
277 return SkString("scale-pixels"); | 277 return SkString("scale-pixels"); |
278 } | 278 } |
279 | 279 |
280 SkISize onISize() override { | 280 SkISize onISize() override { |
281 return SkISize::Make(960, 1200); | 281 return SkISize::Make(960, 1200); |
282 } | 282 } |
283 | 283 |
284 void onDraw(SkCanvas* canvas) override { | 284 void onDraw(SkCanvas* canvas) override { |
285 const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100); | 285 const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100); |
286 | 286 |
287 const ImageMakerProc procs[] = { | 287 const ImageMakerProc procs[] = { |
288 make_codec, make_raster, make_picture, make_codec, make_gpu, | 288 make_codec, make_raster, make_picture, make_codec, make_gpu, |
289 }; | 289 }; |
290 for (auto& proc : procs) { | 290 for (auto& proc : procs) { |
291 SkAutoTUnref<SkImage> image(proc(info, canvas->getGrContext())); | 291 SkAutoTUnref<SkImage> image(proc(info, canvas->getGrContext(), draw_
contents)); |
292 if (image) { | 292 if (image) { |
293 show_scaled_pixels(canvas, image); | 293 show_scaled_pixels(canvas, image); |
294 } | 294 } |
295 canvas->translate(0, 120); | 295 canvas->translate(0, 120); |
296 } | 296 } |
297 } | 297 } |
298 | 298 |
299 private: | 299 private: |
300 typedef skiagm::GM INHERITED; | 300 typedef skiagm::GM INHERITED; |
301 }; | 301 }; |
302 DEF_GM( return new ScalePixelsGM; ) | 302 DEF_GM( return new ScalePixelsGM; ) |
| 303 |
| 304 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
| 305 |
| 306 #include "SkImageGenerator.h" |
| 307 |
| 308 static SkImageInfo make_info(SkImage* img) { |
| 309 return SkImageInfo::MakeN32(img->width(), img->height(), |
| 310 img->isOpaque() ? kOpaque_SkAlphaType : kPremul_
SkAlphaType); |
| 311 } |
| 312 |
| 313 // Its simple, but I wonder if we should expose this formally? |
| 314 // |
| 315 class ImageGeneratorFromImage : public SkImageGenerator { |
| 316 public: |
| 317 ImageGeneratorFromImage(SkImage* img) : INHERITED(make_info(img)), fImg(SkRe
f(img)) {} |
| 318 |
| 319 protected: |
| 320 bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkP
MColor ctable[], |
| 321 int* ctableCount) override { |
| 322 return fImg->readPixels(info, pixels, rowBytes, 0, 0); |
| 323 } |
| 324 |
| 325 private: |
| 326 SkAutoTUnref<SkImage> fImg; |
| 327 |
| 328 typedef SkImageGenerator INHERITED; |
| 329 }; |
| 330 |
| 331 static void draw_opaque_contents(SkCanvas* canvas) { |
| 332 canvas->drawColor(0xFFFF8844); |
| 333 |
| 334 SkPaint paint; |
| 335 paint.setStyle(SkPaint::kStroke_Style); |
| 336 paint.setStrokeWidth(20); |
| 337 canvas->drawCircle(50, 50, 35, paint); |
| 338 } |
| 339 |
| 340 static SkImageGenerator* gen_raster(const SkImageInfo& info) { |
| 341 SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info)); |
| 342 draw_opaque_contents(surface->getCanvas()); |
| 343 SkAutoTUnref<SkImage> img(surface->newImageSnapshot()); |
| 344 return new ImageGeneratorFromImage(img); |
| 345 } |
| 346 |
| 347 static SkImageGenerator* gen_picture(const SkImageInfo& info) { |
| 348 SkPictureRecorder recorder; |
| 349 draw_opaque_contents(recorder.beginRecording(SkRect::MakeIWH(info.width(), i
nfo.height()))); |
| 350 SkAutoTUnref<SkPicture> pict(recorder.endRecording()); |
| 351 return SkImageGenerator::NewFromPicture(info.dimensions(), pict, nullptr, nu
llptr); |
| 352 } |
| 353 |
| 354 static SkImageGenerator* gen_png(const SkImageInfo& info) { |
| 355 SkAutoTUnref<SkImage> image(make_raster(info, nullptr, draw_opaque_contents)
); |
| 356 SkAutoTUnref<SkData> data(image->encode(SkImageEncoder::kPNG_Type, 100)); |
| 357 return SkImageGenerator::NewFromEncoded(data); |
| 358 } |
| 359 |
| 360 static SkImageGenerator* gen_jpg(const SkImageInfo& info) { |
| 361 SkAutoTUnref<SkImage> image(make_raster(info, nullptr, draw_opaque_contents)
); |
| 362 SkAutoTUnref<SkData> data(image->encode(SkImageEncoder::kJPEG_Type, 100)); |
| 363 return SkImageGenerator::NewFromEncoded(data); |
| 364 } |
| 365 |
| 366 typedef SkImageGenerator* (*GeneratorMakerProc)(const SkImageInfo&); |
| 367 |
| 368 static void show_scaled_generator(SkCanvas* canvas, SkImageGenerator* gen) { |
| 369 const SkImageInfo genInfo = gen->getInfo(); |
| 370 |
| 371 SkAutoCanvasRestore acr(canvas, true); |
| 372 |
| 373 SkBitmap bm; |
| 374 bm.allocPixels(genInfo); |
| 375 if (gen->getPixels(bm.info(), bm.getPixels(), bm.rowBytes())) { |
| 376 canvas->drawBitmap(bm, 0, 0, nullptr); |
| 377 } |
| 378 canvas->translate(110, 0); |
| 379 |
| 380 const float scales[] = { 0.75f, 0.5f, 0.25f }; |
| 381 for (auto scale : scales) { |
| 382 SkImageGenerator::SupportedSizes sizes; |
| 383 if (gen->computeScaledDimensions(scale, &sizes)) { |
| 384 const SkImageInfo info = SkImageInfo::MakeN32Premul(sizes.fSizes[0].
width(), |
| 385 sizes.fSizes[0].
height()); |
| 386 bm.allocPixels(info); |
| 387 SkPixmap pmap; |
| 388 bm.peekPixels(&pmap); |
| 389 if (gen->generateScaledPixels(pmap)) { |
| 390 canvas->drawBitmap(bm, 0, SkIntToScalar(genInfo.height() - info.
height())/2); |
| 391 } |
| 392 } |
| 393 canvas->translate(100, 0); |
| 394 } |
| 395 } |
| 396 |
| 397 class ScaleGeneratorGM : public skiagm::GM { |
| 398 public: |
| 399 ScaleGeneratorGM() {} |
| 400 |
| 401 protected: |
| 402 SkString onShortName() override { |
| 403 return SkString("scale-generator"); |
| 404 } |
| 405 |
| 406 SkISize onISize() override { |
| 407 return SkISize::Make(500, 500); |
| 408 } |
| 409 |
| 410 void onDraw(SkCanvas* canvas) override { |
| 411 canvas->translate(10, 10); |
| 412 |
| 413 // explicitly make it opaque, so we can test JPEG (which is only ever op
aque) |
| 414 const SkImageInfo info = SkImageInfo::MakeN32(100, 100, kOpaque_SkAlphaT
ype); |
| 415 |
| 416 const GeneratorMakerProc procs[] = { |
| 417 gen_raster, gen_picture, gen_png, gen_jpg, |
| 418 }; |
| 419 for (auto& proc : procs) { |
| 420 SkAutoTDelete<SkImageGenerator> gen(proc(info)); |
| 421 if (gen) { |
| 422 show_scaled_generator(canvas, gen); |
| 423 } |
| 424 canvas->translate(0, 120); |
| 425 } |
| 426 } |
| 427 |
| 428 private: |
| 429 typedef skiagm::GM INHERITED; |
| 430 }; |
| 431 DEF_GM( return new ScaleGeneratorGM; ) |
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