aboutsummaryrefslogtreecommitdiffhomepage
path: root/gm/image.cpp
blob: 2592131334ec48a30af55f0f112861f6f4ee4c57 (plain)
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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include <functional>
#include "gm.h"
#include "sk_tool_utils.h"
#include "SkAutoPixmapStorage.h"
#include "SkColorPriv.h"
#include "SkData.h"
#include "SkCanvas.h"
#include "SkRandom.h"
#include "SkStream.h"
#include "SkSurface.h"

#include "GrContext.h"

static void drawContents(SkSurface* surface, SkColor fillC) {
    SkSize size = SkSize::Make(SkIntToScalar(surface->width()),
                               SkIntToScalar(surface->height()));
    SkCanvas* canvas = surface->getCanvas();

    SkScalar stroke = size.fWidth / 10;
    SkScalar radius = (size.fWidth - stroke) / 2;

    SkPaint paint;

    paint.setAntiAlias(true);
    paint.setColor(fillC);
    canvas->drawCircle(size.fWidth/2, size.fHeight/2, radius, paint);

    paint.setStyle(SkPaint::kStroke_Style);
    paint.setStrokeWidth(stroke);
    paint.setColor(SK_ColorBLACK);
    canvas->drawCircle(size.fWidth/2, size.fHeight/2, radius, paint);
}

static void test_surface(SkCanvas* canvas, SkSurface* surf, bool usePaint) {
    drawContents(surf, SK_ColorRED);
    sk_sp<SkImage> imgR = surf->makeImageSnapshot();

    if (true) {
        sk_sp<SkImage> imgR2 = surf->makeImageSnapshot();
        SkASSERT(imgR == imgR2);
    }

    drawContents(surf, SK_ColorGREEN);
    sk_sp<SkImage> imgG = surf->makeImageSnapshot();

    // since we've drawn after we snapped imgR, imgG will be a different obj
    SkASSERT(imgR != imgG);

    drawContents(surf, SK_ColorBLUE);

    SkPaint paint;
//    paint.setFilterBitmap(true);
//    paint.setAlpha(0x80);

    canvas->drawImage(imgR, 0, 0, usePaint ? &paint : nullptr);
    canvas->drawImage(imgG, 0, 80, usePaint ? &paint : nullptr);
    surf->draw(canvas, 0, 160, usePaint ? &paint : nullptr);

    SkRect src1, src2, src3;
    src1.iset(0, 0, surf->width(), surf->height());
    src2.iset(-surf->width() / 2, -surf->height() / 2,
             surf->width(), surf->height());
    src3.iset(0, 0, surf->width() / 2, surf->height() / 2);

    SkRect dst1, dst2, dst3, dst4;
    dst1.set(0, 240, 65, 305);
    dst2.set(0, 320, 65, 385);
    dst3.set(0, 400, 65, 465);
    dst4.set(0, 480, 65, 545);

    canvas->drawImageRect(imgR, src1, dst1, usePaint ? &paint : nullptr);
    canvas->drawImageRect(imgG, src2, dst2, usePaint ? &paint : nullptr);
    canvas->drawImageRect(imgR, src3, dst3, usePaint ? &paint : nullptr);
    canvas->drawImageRect(imgG, dst4, usePaint ? &paint : nullptr);
}

class ImageGM : public skiagm::GM {
    void*   fBuffer;
    size_t  fBufferSize;
    SkSize  fSize;
    enum {
        W = 64,
        H = 64,
        RB = W * 4 + 8,
    };
public:
    ImageGM() {
        fBufferSize = RB * H;
        fBuffer = sk_malloc_throw(fBufferSize);
        fSize.set(SkIntToScalar(W), SkIntToScalar(H));
    }

    ~ImageGM() override {
        sk_free(fBuffer);
    }

protected:
    SkString onShortName() override {
        return SkString("image-surface");
    }

    SkISize onISize() override {
        return SkISize::Make(960, 1200);
    }

    void onDraw(SkCanvas* canvas) override {
        canvas->scale(2, 2);

        const char* kLabel1 = "Original Img";
        const char* kLabel2 = "Modified Img";
        const char* kLabel3 = "Cur Surface";
        const char* kLabel4 = "Full Crop";
        const char* kLabel5 = "Over-crop";
        const char* kLabel6 = "Upper-left";
        const char* kLabel7 = "No Crop";

        const char* kLabel8 = "Pre-Alloc Img";
        const char* kLabel9 = "New Alloc Img";
        const char* kLabel10 = "GPU";

        SkPaint textPaint;
        textPaint.setAntiAlias(true);
        sk_tool_utils::set_portable_typeface(&textPaint);
        textPaint.setTextSize(8);

        canvas->drawString(kLabel1, 10,  60, textPaint);
        canvas->drawString(kLabel2, 10, 140, textPaint);
        canvas->drawString(kLabel3, 10, 220, textPaint);
        canvas->drawString(kLabel4, 10, 300, textPaint);
        canvas->drawString(kLabel5, 10, 380, textPaint);
        canvas->drawString(kLabel6, 10, 460, textPaint);
        canvas->drawString(kLabel7, 10, 540, textPaint);

        canvas->drawString(kLabel8, 80, 10, textPaint);
        canvas->drawString(kLabel9, 160, 10, textPaint);
        canvas->drawString(kLabel10, 265, 10, textPaint);

        canvas->translate(80, 20);

        // since we draw into this directly, we need to start fresh
        sk_bzero(fBuffer, fBufferSize);

        SkImageInfo info = SkImageInfo::MakeN32Premul(W, H);
        sk_sp<SkSurface> surf0(SkSurface::MakeRasterDirect(info, fBuffer, RB));
        sk_sp<SkSurface> surf1(SkSurface::MakeRaster(info));
        sk_sp<SkSurface> surf2(SkSurface::MakeRenderTarget(canvas->getGrContext(),
                                                           SkBudgeted::kNo, info));

        test_surface(canvas, surf0.get(), true);
        canvas->translate(80, 0);
        test_surface(canvas, surf1.get(), true);
        if (surf2) {
            canvas->translate(80, 0);
            test_surface(canvas, surf2.get(), true);
        }
    }

private:
    typedef skiagm::GM INHERITED;
};
DEF_GM( return new ImageGM; )

///////////////////////////////////////////////////////////////////////////////////////////////////

#include "SkPictureRecorder.h"

static void draw_pixmap(SkCanvas* canvas, const SkPixmap& pmap) {
    SkBitmap bitmap;
    bitmap.installPixels(pmap);
    canvas->drawBitmap(bitmap, 0, 0, nullptr);
}

static void show_scaled_pixels(SkCanvas* canvas, SkImage* image) {
    SkAutoCanvasRestore acr(canvas, true);

    canvas->drawImage(image, 0, 0, nullptr);
    canvas->translate(110, 10);

    const SkImageInfo info = SkImageInfo::MakeN32Premul(40, 40);
    SkAutoPixmapStorage storage;
    storage.alloc(info);

    const SkImage::CachingHint chints[] = {
        SkImage::kAllow_CachingHint, SkImage::kDisallow_CachingHint,
    };
    const SkFilterQuality qualities[] = {
        kNone_SkFilterQuality, kLow_SkFilterQuality, kMedium_SkFilterQuality, kHigh_SkFilterQuality,
    };

    for (auto ch : chints) {
        canvas->save();
        for (auto q : qualities) {
            if (image->scalePixels(storage, q, ch)) {
                draw_pixmap(canvas, storage);
            }
            canvas->translate(70, 0);
        }
        canvas->restore();
        canvas->translate(0, 45);
    }
}

static void draw_contents(SkCanvas* canvas) {
    SkPaint paint;
    paint.setStyle(SkPaint::kStroke_Style);
    paint.setStrokeWidth(20);
    canvas->drawCircle(50, 50, 35, paint);
}

static sk_sp<SkImage> make_raster(const SkImageInfo& info, GrContext*, void (*draw)(SkCanvas*)) {
    auto surface(SkSurface::MakeRaster(info));
    draw(surface->getCanvas());
    return surface->makeImageSnapshot();
}

static sk_sp<SkImage> make_picture(const SkImageInfo& info, GrContext*, void (*draw)(SkCanvas*)) {
    SkPictureRecorder recorder;
    draw(recorder.beginRecording(SkRect::MakeIWH(info.width(), info.height())));
    return SkImage::MakeFromPicture(recorder.finishRecordingAsPicture(),
                                    info.dimensions(), nullptr, nullptr, SkImage::BitDepth::kU8,
                                    SkColorSpace::MakeSRGB());
}

static sk_sp<SkImage> make_codec(const SkImageInfo& info, GrContext*, void (*draw)(SkCanvas*)) {
    sk_sp<SkImage> image(make_raster(info, nullptr, draw));
    return SkImage::MakeFromEncoded(image->encodeToData());
}

static sk_sp<SkImage> make_gpu(const SkImageInfo& info, GrContext* ctx, void (*draw)(SkCanvas*)) {
    if (!ctx) { return nullptr; }
    auto surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info));
    if (!surface) { return nullptr; }
    draw(surface->getCanvas());
    return surface->makeImageSnapshot();
}

typedef sk_sp<SkImage> (*ImageMakerProc)(const SkImageInfo&, GrContext*, void (*)(SkCanvas*));

class ScalePixelsGM : public skiagm::GM {
public:
    ScalePixelsGM() {}

protected:
    SkString onShortName() override {
        return SkString("scale-pixels");
    }

    SkISize onISize() override {
        return SkISize::Make(960, 1200);
    }

    void onDraw(SkCanvas* canvas) override {
        const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);

        const ImageMakerProc procs[] = {
            make_codec, make_raster, make_picture, make_codec, make_gpu,
        };
        for (auto& proc : procs) {
            sk_sp<SkImage> image(proc(info, canvas->getGrContext(), draw_contents));
            if (image) {
                show_scaled_pixels(canvas, image.get());
            }
            canvas->translate(0, 120);
        }
    }

private:
    typedef skiagm::GM INHERITED;
};
DEF_GM( return new ScalePixelsGM; )

///////////////////////////////////////////////////////////////////////////////////////////////////

DEF_SIMPLE_GM(new_texture_image, canvas, 280, 60) {
    GrContext* context = canvas->getGrContext();
    if (!context) {
        skiagm::GM::DrawGpuOnlyMessage(canvas);
        return;
    }

    auto render_image = [](SkCanvas* canvas) {
        canvas->clear(SK_ColorBLUE);
        SkPaint paint;
        paint.setColor(SK_ColorRED);
        canvas->drawRect(SkRect::MakeXYWH(10.f,10.f,10.f,10.f), paint);
        paint.setColor(SK_ColorGREEN);
        canvas->drawRect(SkRect::MakeXYWH(30.f,10.f,10.f,10.f), paint);
        paint.setColor(SK_ColorYELLOW);
        canvas->drawRect(SkRect::MakeXYWH(10.f,30.f,10.f,10.f), paint);
        paint.setColor(SK_ColorCYAN);
        canvas->drawRect(SkRect::MakeXYWH(30.f,30.f,10.f,10.f), paint);
    };

    static constexpr int kSize = 50;
    SkBitmap bmp;
    bmp.allocPixels(SkImageInfo::MakeS32(kSize, kSize, kPremul_SkAlphaType));
    SkCanvas bmpCanvas(bmp);
    render_image(&bmpCanvas);

    std::function<sk_sp<SkImage>()> imageFactories[] = {
        // Create sw raster image.
        [bmp] {
            return SkImage::MakeFromBitmap(bmp);
        },
        // Create encoded image.
        [bmp] {
            sk_sp<SkData> src(
                sk_tool_utils::EncodeImageToData(bmp, SkEncodedImageFormat::kPNG, 100));
            return SkImage::MakeFromEncoded(std::move(src));
        },
        // Create YUV encoded image.
        [bmp] {
            sk_sp<SkData> src(
                sk_tool_utils::EncodeImageToData(bmp, SkEncodedImageFormat::kJPEG, 100));
            return SkImage::MakeFromEncoded(std::move(src));
        },
        // Create a picture image.
        [render_image] {
            SkPictureRecorder recorder;
            SkCanvas* canvas = recorder.beginRecording(SkIntToScalar(kSize), SkIntToScalar(kSize));
            render_image(canvas);
            sk_sp<SkColorSpace> srgbColorSpace = SkColorSpace::MakeSRGB();
            return SkImage::MakeFromPicture(recorder.finishRecordingAsPicture(),
                                            SkISize::Make(kSize, kSize), nullptr, nullptr,
                                            SkImage::BitDepth::kU8, srgbColorSpace);
        },
        // Create a texture image
        [context, render_image]() -> sk_sp<SkImage> {
            auto surface(SkSurface::MakeRenderTarget(context, SkBudgeted::kYes,
                                                     SkImageInfo::MakeS32(kSize, kSize,
                                                                          kPremul_SkAlphaType)));
            if (!surface) {
                return nullptr;
            }
            render_image(surface->getCanvas());
            return surface->makeImageSnapshot();
        }
    };

    constexpr SkScalar kPad = 5.f;
    canvas->translate(kPad, kPad);
    for (auto factory : imageFactories) {
        auto image(factory());
        if (image) {
            sk_sp<SkImage> texImage(image->makeTextureImage(context,
                                                            canvas->imageInfo().colorSpace()));
            if (texImage) {
                canvas->drawImage(texImage, 0, 0);
            }
        }
        canvas->translate(kSize + kPad, 0);
    }
}

static void draw_pixmap(SkCanvas* canvas, const SkPixmap& pm, SkScalar x, SkScalar y) {
    canvas->drawImage(SkImage::MakeRasterCopy(pm), x, y, nullptr);
}

static void slam_ff(const SkPixmap& pm) {
    for (int y = 0; y < pm.height(); ++y) {
        for (int x = 0; x < pm.width(); ++x) {
            *pm.writable_addr32(x, y) = *pm.addr32(x, y) | SkPackARGB32(0xFF, 0, 0, 0);
        }
    }
}

DEF_SIMPLE_GM(scalepixels_unpremul, canvas, 1080, 280) {
    SkImageInfo info = SkImageInfo::MakeN32(16, 16, kUnpremul_SkAlphaType);
    SkAutoPixmapStorage pm;
    pm.alloc(info);
    for (int y = 0; y < 16; ++y) {
        for (int x = 0; x < 16; ++x) {
            *pm.writable_addr32(x, y) = SkPackARGB32NoCheck(0, (y << 4) | y, (x << 4) | x, 0xFF);
        }
    }
    SkAutoPixmapStorage pm2;
    pm2.alloc(SkImageInfo::MakeN32(256, 256, kUnpremul_SkAlphaType));

    const SkFilterQuality qualities[] = {
        kNone_SkFilterQuality, kLow_SkFilterQuality, kMedium_SkFilterQuality, kHigh_SkFilterQuality
    };

    for (auto fq : qualities) {
        pm.scalePixels(pm2, fq);
        slam_ff(pm2);
        draw_pixmap(canvas, pm2, 10, 10);
        canvas->translate(pm2.width() + 10.0f, 0);
    }
}

///////////////////////////////////////////////////////////////////////////////////////////////////

static sk_sp<SkImage> make_lazy_image(SkSurface* surf) {
    surf->getCanvas()->drawCircle(100, 100, 100, SkPaint());
    auto data = surf->makeImageSnapshot()->encodeToData();
    return SkImage::MakeFromEncoded(data);
}

#include "SkWriteBuffer.h"
#include "SkReadBuffer.h"
static sk_sp<SkImage> serial_deserial(SkImage* img) {
    SkBinaryWriteBuffer writer;
    writer.writeImage(img);
    size_t length = writer.bytesWritten();
    auto data = SkData::MakeUninitialized(length);
    writer.writeToMemory(data->writable_data());

    SkReadBuffer reader(data->data(), length);
    return reader.readImage();
}

DEF_SIMPLE_GM(image_subset, canvas, 440, 220) {
    SkImageInfo info = SkImageInfo::MakeN32Premul(200, 200, nullptr);
    auto surf = sk_tool_utils::makeSurface(canvas, info, nullptr);
    auto img = make_lazy_image(surf.get());

    canvas->drawImage(img, 10, 10, nullptr);
    auto sub = img->makeSubset({100, 100, 200, 200});
    canvas->drawImage(sub, 220, 10);
    sub = serial_deserial(sub.get());
    canvas->drawImage(sub, 220+110, 10);
}