C++ SkBitmap::deepCopyTo方法代码示例

static SkBitmap deepSkBitmapCopy(const SkBitmap& bitmap)
{
    SkBitmap tmp;
    if (!bitmap.deepCopyTo(&tmp, bitmap.config()))
        bitmap.copyTo(&tmp, bitmap.config());

    return tmp;
}

PassRefPtr<BitmapImageSingleFrameSkia> BitmapImageSingleFrameSkia::create(const SkBitmap& bitmap, bool copyPixels, float resolutionScale)
{
    if (copyPixels) {
        SkBitmap temp;
        if (!bitmap.deepCopyTo(&temp, bitmap.config()))
            bitmap.copyTo(&temp, bitmap.config());
        return adoptRef(new BitmapImageSingleFrameSkia(temp, resolutionScale));
    }
    return adoptRef(new BitmapImageSingleFrameSkia(bitmap, resolutionScale));
}

    virtual void onDraw(SkCanvas* canvas) {
        SkPaint paint;
        SkScalar horizMargin(SkIntToScalar(10));
        SkScalar vertMargin(SkIntToScalar(10));

        SkBitmapDevice devTmp(SkBitmap::kARGB_8888_Config, 40, 40, false);
        SkCanvas canvasTmp(&devTmp);

        draw_checks(&canvasTmp, 40, 40);
        SkBitmap src = canvasTmp.getTopDevice()->accessBitmap(false);

        for (unsigned i = 0; i < NUM_CONFIGS; ++i) {
            if (!src.deepCopyTo(&fDst[i], gConfigs[i])) {
                src.copyTo(&fDst[i], gConfigs[i]);
            }
        }

        canvas->clear(0xFFDDDDDD);
        paint.setAntiAlias(true);
        SkScalar width = SkIntToScalar(40);
        SkScalar height = SkIntToScalar(40);
        if (paint.getFontSpacing() > height) {
            height = paint.getFontSpacing();
        }
        for (unsigned i = 0; i < NUM_CONFIGS; i++) {
            const char* name = gConfigNames[src.config()];
            SkScalar textWidth = paint.measureText(name, strlen(name));
            if (textWidth > width) {
                width = textWidth;
            }
        }
        SkScalar horizOffset = width + horizMargin;
        SkScalar vertOffset = height + vertMargin;
        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));

        for (unsigned i = 0; i < NUM_CONFIGS; i++) {
            canvas->save();
            // Draw destination config name
            const char* name = gConfigNames[fDst[i].config()];
            SkScalar textWidth = paint.measureText(name, strlen(name));
            SkScalar x = (width - textWidth) / SkScalar(2);
            SkScalar y = paint.getFontSpacing() / SkScalar(2);
            canvas->drawText(name, strlen(name), x, y, paint);

            // Draw destination bitmap
            canvas->translate(0, vertOffset);
            x = (width - 40) / SkScalar(2);
            canvas->drawBitmap(fDst[i], x, 0, &paint);
            canvas->restore();

            canvas->translate(horizOffset, 0);
        }
    }

SkPDFImage::SkPDFImage(SkStream* stream,
                       const SkBitmap& bitmap,
                       bool isAlpha,
                       const SkIRect& srcRect)
    : fIsAlpha(isAlpha),
      fSrcRect(srcRect) {

    if (bitmap.isImmutable()) {
        fBitmap = bitmap;
    } else {
        bitmap.deepCopyTo(&fBitmap);
        fBitmap.setImmutable();
    }

    if (stream != NULL) {
        this->setData(stream);
        fStreamValid = true;
    } else {
        fStreamValid = false;
    }

    SkColorType colorType = fBitmap.colorType();

    insertName("Type", "XObject");
    insertName("Subtype", "Image");

    bool alphaOnly = (kAlpha_8_SkColorType == colorType);

    if (!isAlpha && alphaOnly) {
        // For alpha only images, we stretch a single pixel of black for
        // the color/shape part.
        SkAutoTUnref<SkPDFInt> one(new SkPDFInt(1));
        insert("Width", one.get());
        insert("Height", one.get());
    } else {
        insertInt("Width", fSrcRect.width());
        insertInt("Height", fSrcRect.height());
    }

    if (isAlpha || alphaOnly) {
        insertName("ColorSpace", "DeviceGray");
    } else if (kIndex_8_SkColorType == colorType) {
        SkAutoLockPixels alp(fBitmap);
        insert("ColorSpace",
               make_indexed_color_space(fBitmap.getColorTable()))->unref();
    } else {
        insertName("ColorSpace", "DeviceRGB");
    }

    int bitsPerComp = 8;
    if (kARGB_4444_SkColorType == colorType) {
        bitsPerComp = 4;
    }
    insertInt("BitsPerComponent", bitsPerComp);

    if (kRGB_565_SkColorType == colorType) {
        SkASSERT(!isAlpha);
        SkAutoTUnref<SkPDFInt> zeroVal(new SkPDFInt(0));
        SkAutoTUnref<SkPDFScalar> scale5Val(
                new SkPDFScalar(8.2258f));  // 255/2^5-1
        SkAutoTUnref<SkPDFScalar> scale6Val(
                new SkPDFScalar(4.0476f));  // 255/2^6-1
        SkAutoTUnref<SkPDFArray> decodeValue(new SkPDFArray());
        decodeValue->reserve(6);
        decodeValue->append(zeroVal.get());
        decodeValue->append(scale5Val.get());
        decodeValue->append(zeroVal.get());
        decodeValue->append(scale6Val.get());
        decodeValue->append(zeroVal.get());
        decodeValue->append(scale5Val.get());
        insert("Decode", decodeValue.get());
    }
}

// Stripped down version of TestBitmapCopy that checks basic fields (width, height, config, genID)
// to ensure that they were copied properly.
static void TestGpuBitmapCopy(skiatest::Reporter* reporter, GrContextFactory* factory) {
#ifdef SK_BUILD_FOR_ANDROID // https://code.google.com/p/skia/issues/detail?id=753
    return;
#endif
    for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
        GrContextFactory::GLContextType glType = static_cast<GrContextFactory::GLContextType>(type);
        if (!GrContextFactory::IsRenderingGLContext(glType)) {
            continue;
        }

        GrContext* grContext = factory->get(glType);
        if (NULL == grContext) {
            continue;
        }


        if (NULL == grContext) {
            return;
        }
        static const Pair gPairs[] = {
            { SkBitmap::kNo_Config,         "000"  },
            { SkBitmap::kARGB_4444_Config,  "011"  },
            { SkBitmap::kARGB_8888_Config,  "011"  },
        };

        const int W = 20;
        const int H = 33;

        for (size_t i = 0; i < SK_ARRAY_COUNT(gPairs); i++) {
            SkBitmap src, dst;

            SkGpuDevice* device = SkNEW_ARGS(SkGpuDevice, (grContext, gPairs[i].fConfig, W, H));
            SkAutoUnref aur(device);
            src = device->accessBitmap(false);
            device->clear(SK_ColorWHITE);

            // Draw something different to the same portion of the bitmap that we will extract as a
            // subset, so that comparing the pixels of the subset will be meaningful.
            SkIRect subsetRect = SkIRect::MakeLTRB(W/2, H/2, W, H);
            SkCanvas drawingCanvas(device);
            SkPaint paint;
            paint.setColor(SK_ColorRED);
            drawingCanvas.drawRect(SkRect::MakeFromIRect(subsetRect), paint);

            // Extract a subset. If this succeeds we will test copying the subset.
            SkBitmap subset;
            const bool extracted = src.extractSubset(&subset, subsetRect);

            for (size_t j = 0; j < SK_ARRAY_COUNT(gPairs); j++) {
                dst.reset();
                bool success = src.deepCopyTo(&dst, gPairs[j].fConfig);
                bool expected = gPairs[i].fValid[j] != '0';
                if (success != expected) {
                    SkString str;
                    str.printf("SkBitmap::deepCopyTo from %s to %s. expected %s returned %s",
                               gConfigName[i], gConfigName[j], boolStr(expected),
                               boolStr(success));
                    reporter->reportFailed(str);
                }

                bool canSucceed = src.canCopyTo(gPairs[j].fConfig);
                if (success != canSucceed) {
                    SkString str;
                    str.printf("SkBitmap::deepCopyTo from %s to %s returned %s,"
                               "but canCopyTo returned %s",
                               gConfigName[i], gConfigName[j], boolStr(success),
                               boolStr(canSucceed));
                    reporter->reportFailed(str);
                }

                TestIndividualCopy(reporter, gPairs[j].fConfig, success, src, dst);

                // Test copying the subset bitmap, using both copyTo and deepCopyTo.
                if (extracted) {
                    SkBitmap subsetCopy;
                    success = subset.copyTo(&subsetCopy, gPairs[j].fConfig);
                    REPORTER_ASSERT(reporter, success == expected);
                    REPORTER_ASSERT(reporter, success == canSucceed);
                    TestIndividualCopy(reporter, gPairs[j].fConfig, success, subset, subsetCopy,
                                       false);

                    // Reset the bitmap so that a failed copyTo will leave it in the expected state.
                    subsetCopy.reset();
                    success = subset.deepCopyTo(&subsetCopy, gPairs[j].fConfig);
                    REPORTER_ASSERT(reporter, success == expected);
                    REPORTER_ASSERT(reporter, success == canSucceed);
                    TestIndividualCopy(reporter, gPairs[j].fConfig, success, subset, subsetCopy,
                                       true);
                }
            } // for (size_t j = ...
        } // for (size_t i = ...
    } // GrContextFactory::GLContextType
}