当前位置: 首页>>代码示例>>C++>>正文


C++ SkImageDecoder::setAllocator方法代码示例

本文整理汇总了C++中SkImageDecoder::setAllocator方法的典型用法代码示例。如果您正苦于以下问题:C++ SkImageDecoder::setAllocator方法的具体用法?C++ SkImageDecoder::setAllocator怎么用?C++ SkImageDecoder::setAllocator使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在SkImageDecoder的用法示例。


在下文中一共展示了SkImageDecoder::setAllocator方法的5个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: doBuildTileIndex

static jobject doBuildTileIndex(JNIEnv* env, SkStream* stream) {
    SkImageDecoder* decoder = SkImageDecoder::Factory(stream);
    int width, height;
    if (NULL == decoder) {
        // fail to get decoder, do not forget to free stream
        stream->unref();
        doThrowIOE(env, "Image format not supported");
        return nullObjectReturn("SkImageDecoder::Factory returned null");
    }

    JavaPixelAllocator *javaAllocator = new JavaPixelAllocator(env);
    decoder->setAllocator(javaAllocator);
    javaAllocator->unref();

    if (!decoder->buildTileIndex(stream, &width, &height)) {
        char msg[100];
        snprintf(msg, sizeof(msg), "Image failed to decode using %s decoder",
                decoder->getFormatName());
        // fail to build tile index, do not forget to free stream
        stream->unref();
        doThrowIOE(env, msg);
        return nullObjectReturn("decoder->buildTileIndex returned false");
    }

    SkBitmapRegionDecoder *bm = new SkBitmapRegionDecoder(decoder, stream, width, height);

    return GraphicsJNI::createBitmapRegionDecoder(env, bm);
}
开发者ID:0xr0ot,项目名称:frameworks_base,代码行数:28,代码来源:BitmapRegionDecoder.cpp

示例2: doDecode

// since we "may" create a purgeable imageref, we require the stream be ref'able
// i.e. dynamically allocated, since its lifetime may exceed the current stack
// frame.
static jobject doDecode(JNIEnv* env, SkStreamRewindable* stream, jobject padding,
        jobject options, bool allowPurgeable, bool forcePurgeable = false) {

    int sampleSize = 1;

    SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode;
    SkBitmap::Config prefConfig = SkBitmap::kARGB_8888_Config;

    bool doDither = true;
    bool isMutable = false;
    float scale = 1.0f;
    bool isPurgeable = forcePurgeable || (allowPurgeable && optionsPurgeable(env, options));
    bool preferQualityOverSpeed = false;
    bool requireUnpremultiplied = false;

    jobject javaBitmap = NULL;

    if (options != NULL) {
        sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID);
        if (optionsJustBounds(env, options)) {
            mode = SkImageDecoder::kDecodeBounds_Mode;
        }

        // initialize these, in case we fail later on
        env->SetIntField(options, gOptions_widthFieldID, -1);
        env->SetIntField(options, gOptions_heightFieldID, -1);
        env->SetObjectField(options, gOptions_mimeFieldID, 0);

        jobject jconfig = env->GetObjectField(options, gOptions_configFieldID);
        prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig);
        isMutable = env->GetBooleanField(options, gOptions_mutableFieldID);
        doDither = env->GetBooleanField(options, gOptions_ditherFieldID);
        preferQualityOverSpeed = env->GetBooleanField(options,
                gOptions_preferQualityOverSpeedFieldID);
        requireUnpremultiplied = !env->GetBooleanField(options, gOptions_premultipliedFieldID);
        javaBitmap = env->GetObjectField(options, gOptions_bitmapFieldID);

        if (env->GetBooleanField(options, gOptions_scaledFieldID)) {
            const int density = env->GetIntField(options, gOptions_densityFieldID);
            const int targetDensity = env->GetIntField(options, gOptions_targetDensityFieldID);
            const int screenDensity = env->GetIntField(options, gOptions_screenDensityFieldID);
            if (density != 0 && targetDensity != 0 && density != screenDensity) {
                scale = (float) targetDensity / density;
            }
        }
    }

    const bool willScale = scale != 1.0f;
    isPurgeable &= !willScale;

    SkImageDecoder* decoder = SkImageDecoder::Factory(stream);
    if (decoder == NULL) {
        return nullObjectReturn("SkImageDecoder::Factory returned null");
    }

    decoder->setSampleSize(sampleSize);
    decoder->setDitherImage(doDither);
    decoder->setPreferQualityOverSpeed(preferQualityOverSpeed);
    decoder->setRequireUnpremultipliedColors(requireUnpremultiplied);

    SkBitmap* outputBitmap = NULL;
    unsigned int existingBufferSize = 0;
    if (javaBitmap != NULL) {
        outputBitmap = (SkBitmap*) env->GetIntField(javaBitmap, gBitmap_nativeBitmapFieldID);
        if (outputBitmap->isImmutable()) {
            ALOGW("Unable to reuse an immutable bitmap as an image decoder target.");
            javaBitmap = NULL;
            outputBitmap = NULL;
        } else {
            existingBufferSize = GraphicsJNI::getBitmapAllocationByteCount(env, javaBitmap);
        }
    }

    SkAutoTDelete<SkBitmap> adb(outputBitmap == NULL ? new SkBitmap : NULL);
    if (outputBitmap == NULL) outputBitmap = adb.get();

    NinePatchPeeker peeker(decoder);
    decoder->setPeeker(&peeker);

    SkImageDecoder::Mode decodeMode = isPurgeable ? SkImageDecoder::kDecodeBounds_Mode : mode;

    JavaPixelAllocator javaAllocator(env);
    RecyclingPixelAllocator recyclingAllocator(outputBitmap->pixelRef(), existingBufferSize);
    ScaleCheckingAllocator scaleCheckingAllocator(scale, existingBufferSize);
    SkBitmap::Allocator* outputAllocator = (javaBitmap != NULL) ?
            (SkBitmap::Allocator*)&recyclingAllocator : (SkBitmap::Allocator*)&javaAllocator;
    if (decodeMode != SkImageDecoder::kDecodeBounds_Mode) {
        if (!willScale) {
            // If the java allocator is being used to allocate the pixel memory, the decoder
            // need not write zeroes, since the memory is initialized to 0.
            decoder->setSkipWritingZeroes(outputAllocator == &javaAllocator);
            decoder->setAllocator(outputAllocator);
        } else if (javaBitmap != NULL) {
            // check for eventual scaled bounds at allocation time, so we don't decode the bitmap
            // only to find the scaled result too large to fit in the allocation
            decoder->setAllocator(&scaleCheckingAllocator);
        }
//.........这里部分代码省略.........
开发者ID:AOSB,项目名称:android_frameworks_base,代码行数:101,代码来源:BitmapFactory.cpp

示例3: doDecode

// since we "may" create a purgeable imageref, we require the stream be ref'able
// i.e. dynamically allocated, since its lifetime may exceed the current stack
// frame.
static jobject doDecode(JNIEnv* env, SkStream* stream, jobject padding,
                        jobject options, bool allowPurgeable, bool forcePurgeable = false,
                        bool applyScale = false, float scale = 1.0f) {

    int sampleSize = 1;

    SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode;
    SkBitmap::Config prefConfig = SkBitmap::kARGB_8888_Config;

    bool doDither = true;
    bool isMutable = false;
    bool willScale = applyScale && scale != 1.0f;
    bool isPurgeable = !willScale &&
                       (forcePurgeable || (allowPurgeable && optionsPurgeable(env, options)));
    bool preferQualityOverSpeed = false;

    jobject javaBitmap = NULL;

    if (options != NULL) {
        sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID);
        if (optionsJustBounds(env, options)) {
            mode = SkImageDecoder::kDecodeBounds_Mode;
        }

        // initialize these, in case we fail later on
        env->SetIntField(options, gOptions_widthFieldID, -1);
        env->SetIntField(options, gOptions_heightFieldID, -1);
        env->SetObjectField(options, gOptions_mimeFieldID, 0);

        jobject jconfig = env->GetObjectField(options, gOptions_configFieldID);
        prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig);
        isMutable = env->GetBooleanField(options, gOptions_mutableFieldID);
        doDither = env->GetBooleanField(options, gOptions_ditherFieldID);
        preferQualityOverSpeed = env->GetBooleanField(options,
                                 gOptions_preferQualityOverSpeedFieldID);
        javaBitmap = env->GetObjectField(options, gOptions_bitmapFieldID);
    }

    if (willScale && javaBitmap != NULL) {
        return nullObjectReturn("Cannot pre-scale a reused bitmap");
    }

    SkImageDecoder* decoder = SkImageDecoder::Factory(stream);
    if (decoder == NULL) {
        return nullObjectReturn("SkImageDecoder::Factory returned null");
    }

    decoder->setSampleSize(sampleSize);
    decoder->setDitherImage(doDither);
    decoder->setPreferQualityOverSpeed(preferQualityOverSpeed);

    NinePatchPeeker peeker(decoder);
    JavaPixelAllocator javaAllocator(env);

    SkBitmap* bitmap;
    if (javaBitmap == NULL) {
        bitmap = new SkBitmap;
    } else {
        if (sampleSize != 1) {
            return nullObjectReturn("SkImageDecoder: Cannot reuse bitmap with sampleSize != 1");
        }
        bitmap = (SkBitmap*) env->GetIntField(javaBitmap, gBitmap_nativeBitmapFieldID);
        // config of supplied bitmap overrules config set in options
        prefConfig = bitmap->getConfig();
    }

    SkAutoTDelete<SkImageDecoder> add(decoder);
    SkAutoTDelete<SkBitmap> adb(bitmap, javaBitmap == NULL);

    decoder->setPeeker(&peeker);
    if (!isPurgeable) {
        decoder->setAllocator(&javaAllocator);
    }

    AutoDecoderCancel adc(options, decoder);

    // To fix the race condition in case "requestCancelDecode"
    // happens earlier than AutoDecoderCancel object is added
    // to the gAutoDecoderCancelMutex linked list.
    if (options != NULL && env->GetBooleanField(options, gOptions_mCancelID)) {
        return nullObjectReturn("gOptions_mCancelID");
    }

    SkImageDecoder::Mode decodeMode = mode;
    if (isPurgeable) {
        decodeMode = SkImageDecoder::kDecodeBounds_Mode;
    }

    SkBitmap* decoded;
    if (willScale) {
        decoded = new SkBitmap;
    } else {
        decoded = bitmap;
    }
    SkAutoTDelete<SkBitmap> adb2(willScale ? decoded : NULL);

    if (!decoder->decode(stream, decoded, prefConfig, decodeMode, javaBitmap != NULL)) {
//.........这里部分代码省略.........
开发者ID:spacecaker,项目名称:android_framework_Mrage,代码行数:101,代码来源:BitmapFactory.cpp

示例4: doDecode

// since we "may" create a purgeable imageref, we require the stream be ref'able
// i.e. dynamically allocated, since its lifetime may exceed the current stack
// frame.
static jobject doDecode(JNIEnv* env, SkStream* stream, jobject padding,
                        jobject options, bool allowPurgeable,
                        bool forcePurgeable = false) {
    int sampleSize = 1;
    SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode;
    SkBitmap::Config prefConfig = SkBitmap::kNo_Config;
    bool doDither = true;
    bool isPurgeable = forcePurgeable ||
                        (allowPurgeable && optionsPurgeable(env, options));
    bool reportSizeToVM = optionsReportSizeToVM(env, options);
    bool preferQualityOverSpeed = false;
    
    if (NULL != options) {
        sampleSize = env->GetIntField(options, gOptions_sampleSizeFieldID);
        if (env->GetBooleanField(options, gOptions_justBoundsFieldID)) {
            mode = SkImageDecoder::kDecodeBounds_Mode;
        }
        // initialize these, in case we fail later on
        env->SetIntField(options, gOptions_widthFieldID, -1);
        env->SetIntField(options, gOptions_heightFieldID, -1);
        env->SetObjectField(options, gOptions_mimeFieldID, 0);
        
        jobject jconfig = env->GetObjectField(options, gOptions_configFieldID);
        prefConfig = GraphicsJNI::getNativeBitmapConfig(env, jconfig);
        doDither = env->GetBooleanField(options, gOptions_ditherFieldID);
        preferQualityOverSpeed = env->GetBooleanField(options,
                gOptions_preferQualityOverSpeedFieldID);
    }

    SkImageDecoder* decoder = SkImageDecoder::Factory(stream);
    if (NULL == decoder) {
        return nullObjectReturn("SkImageDecoder::Factory returned null");
    }
    
    decoder->setSampleSize(sampleSize);
    decoder->setDitherImage(doDither);
    decoder->setPreferQualityOverSpeed(preferQualityOverSpeed);

    NinePatchPeeker     peeker(decoder);
    JavaPixelAllocator  javaAllocator(env, reportSizeToVM);
    SkBitmap*           bitmap = new SkBitmap;
    Res_png_9patch      dummy9Patch;

    SkAutoTDelete<SkImageDecoder>   add(decoder);
    SkAutoTDelete<SkBitmap>         adb(bitmap);

    decoder->setPeeker(&peeker);
    if (!isPurgeable) {
        decoder->setAllocator(&javaAllocator);
    }

    AutoDecoderCancel   adc(options, decoder);

    // To fix the race condition in case "requestCancelDecode"
    // happens earlier than AutoDecoderCancel object is added
    // to the gAutoDecoderCancelMutex linked list.
    if (NULL != options && env->GetBooleanField(options, gOptions_mCancelID)) {
        return nullObjectReturn("gOptions_mCancelID");;
    }

    SkImageDecoder::Mode decodeMode = mode;
    if (isPurgeable) {
        decodeMode = SkImageDecoder::kDecodeBounds_Mode;
    }
    if (!decoder->decode(stream, bitmap, prefConfig, decodeMode)) {
        return nullObjectReturn("decoder->decode returned false");
    }

    // update options (if any)
    if (NULL != options) {
        env->SetIntField(options, gOptions_widthFieldID, bitmap->width());
        env->SetIntField(options, gOptions_heightFieldID, bitmap->height());
        // TODO: set the mimeType field with the data from the codec.
        // but how to reuse a set of strings, rather than allocating new one
        // each time?
        env->SetObjectField(options, gOptions_mimeFieldID,
                            getMimeTypeString(env, decoder->getFormat()));
    }

    // if we're in justBounds mode, return now (skip the java bitmap)
    if (SkImageDecoder::kDecodeBounds_Mode == mode) {
        return NULL;
    }

    jbyteArray ninePatchChunk = NULL;
    if (peeker.fPatchIsValid) {
        size_t ninePatchArraySize = peeker.fPatch->serializedSize();
        ninePatchChunk = env->NewByteArray(ninePatchArraySize);
        if (NULL == ninePatchChunk) {
            return nullObjectReturn("ninePatchChunk == null");
        }
        jbyte* array = (jbyte*)env->GetPrimitiveArrayCritical(ninePatchChunk,
                                                              NULL);
        if (NULL == array) {
            return nullObjectReturn("primitive array == null");
        }
        peeker.fPatch->serialize(array);
//.........这里部分代码省略.........
开发者ID:dew912,项目名称:base,代码行数:101,代码来源:BitmapFactory.cpp

示例5: doDecode


//.........这里部分代码省略.........
    }
//	(env)->ReleaseIntArrayElements(dynamicCon, pdynamicCon, 0);
#endif

    SkBitmap* outputBitmap = NULL;
    unsigned int existingBufferSize = 0;
    if (javaBitmap != NULL) {
        outputBitmap = (SkBitmap*) env->GetLongField(javaBitmap, gBitmap_nativeBitmapFieldID);
        if (outputBitmap->isImmutable()) {
            ALOGW("Unable to reuse an immutable bitmap as an image decoder target.");
            javaBitmap = NULL;
            outputBitmap = NULL;
        } else {
            existingBufferSize = GraphicsJNI::getBitmapAllocationByteCount(env, javaBitmap);
        }
    }

    SkAutoTDelete<SkBitmap> adb(outputBitmap == NULL ? new SkBitmap : NULL);
    if (outputBitmap == NULL) outputBitmap = adb.get();

    NinePatchPeeker peeker(decoder);
    decoder->setPeeker(&peeker);

    JavaPixelAllocator javaAllocator(env);
    RecyclingPixelAllocator recyclingAllocator(outputBitmap->pixelRef(), existingBufferSize);
    ScaleCheckingAllocator scaleCheckingAllocator(scale, existingBufferSize);
    SkBitmap::Allocator* outputAllocator = (javaBitmap != NULL) ?
            (SkBitmap::Allocator*)&recyclingAllocator : (SkBitmap::Allocator*)&javaAllocator;
    if (decodeMode != SkImageDecoder::kDecodeBounds_Mode) {
        if (!willScale) {
            // If the java allocator is being used to allocate the pixel memory, the decoder
            // need not write zeroes, since the memory is initialized to 0.
            decoder->setSkipWritingZeroes(outputAllocator == &javaAllocator);
            decoder->setAllocator(outputAllocator);
        } else if (javaBitmap != NULL) {
            // check for eventual scaled bounds at allocation time, so we don't decode the bitmap
            // only to find the scaled result too large to fit in the allocation
            decoder->setAllocator(&scaleCheckingAllocator);
        }
    }

    // Only setup the decoder to be deleted after its stack-based, refcounted
    // components (allocators, peekers, etc) are declared. This prevents RefCnt
    // asserts from firing due to the order objects are deleted from the stack.
    SkAutoTDelete<SkImageDecoder> add(decoder);

    AutoDecoderCancel adc(options, decoder);

    // To fix the race condition in case "requestCancelDecode"
    // happens earlier than AutoDecoderCancel object is added
    // to the gAutoDecoderCancelMutex linked list.
    if (options != NULL && env->GetBooleanField(options, gOptions_mCancelID)) {
        return nullObjectReturn("gOptions_mCancelID");
    }

    SkBitmap decodingBitmap;
    if (!decoder->decode(stream, &decodingBitmap, prefColorType, decodeMode)) {
        return nullObjectReturn("decoder->decode returned false");
    }

    int scaledWidth = decodingBitmap.width();
    int scaledHeight = decodingBitmap.height();

    if (willScale && decodeMode != SkImageDecoder::kDecodeBounds_Mode) {
        scaledWidth = int(scaledWidth * scale + 0.5f);
        scaledHeight = int(scaledHeight * scale + 0.5f);
开发者ID:,项目名称:,代码行数:67,代码来源:


注:本文中的SkImageDecoder::setAllocator方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。