C++ Asset::close方法代码示例

bool RenderSkinNinePatch::decodeAsset(AssetManager* am, const char* filename, NinePatch* ninepatch) {
    Asset* asset = am->open(filename, android::Asset::ACCESS_BUFFER);
    if (!asset) {
        asset = am->openNonAsset(filename, android::Asset::ACCESS_BUFFER);
        if (!asset) {
            return false;
        }
    }

    SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode;
    SkBitmap::Config prefConfig = SkBitmap::kNo_Config;
    SkMemoryStream stream(asset->getBuffer(false), asset->getLength());
    SkImageDecoder* decoder = SkImageDecoder::Factory(&stream);
    if (!decoder) {
        asset->close();
        ALOGE("RenderSkinNinePatch::Failed to create an image decoder");
        return false;
    }

    decoder->setSampleSize(1);
    decoder->setDitherImage(true);
    decoder->setPreferQualityOverSpeed(false);

    NinePatchPeeker peeker(decoder);

    SkAutoTDelete<SkImageDecoder> add(decoder);

    decoder->setPeeker(&peeker);
    if (!decoder->decode(&stream, &ninepatch->m_bitmap, prefConfig, mode, true)) {
        asset->close();
        ALOGE("RenderSkinNinePatch::Failed to decode nine patch asset");
        return false;
    }

    asset->close();
    if (!peeker.fPatch) {
        ALOGE("RenderSkinNinePatch::Patch data not valid");
        return false;
    }
    void** data = &ninepatch->m_serializedPatchData;
    *data = malloc(peeker.fPatch->serializedSize());
    peeker.fPatch->serialize(*data);
    return true;
}

status_t BootAnimation::initTexture(Texture* texture, AssetManager& assets,
        const char* name) {
    Asset* asset = assets.open(name, Asset::ACCESS_BUFFER);
    if (!asset)
        return NO_INIT;
    SkBitmap bitmap;
    SkImageDecoder::DecodeMemory(asset->getBuffer(false), asset->getLength(),
            &bitmap, SkBitmap::kNo_Config, SkImageDecoder::kDecodePixels_Mode);
    asset->close();
    delete asset;

    // ensure we can call getPixels(). No need to call unlock, since the
    // bitmap will go out of scope when we return from this method.
    bitmap.lockPixels();

    const int w = bitmap.width();
    const int h = bitmap.height();
    const void* p = bitmap.getPixels();

    GLint crop[4] = { 0, h, w, -h };
    texture->w = w;
    texture->h = h;

    glGenTextures(1, &texture->name);
    glBindTexture(GL_TEXTURE_2D, texture->name);

    switch (bitmap.getConfig()) {
        case SkBitmap::kA8_Config:
            glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, w, h, 0, GL_ALPHA,
                    GL_UNSIGNED_BYTE, p);
            break;
        case SkBitmap::kARGB_4444_Config:
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA,
                    GL_UNSIGNED_SHORT_4_4_4_4, p);
            break;
        case SkBitmap::kARGB_8888_Config:
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA,
                    GL_UNSIGNED_BYTE, p);
            break;
        case SkBitmap::kRGB_565_Config:
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0, GL_RGB,
                    GL_UNSIGNED_SHORT_5_6_5, p);
            break;
        default:
            break;
    }

    glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    return NO_ERROR;
}

AssetManagerGlue::XmlBlock*
AssetManagerGlue::openXmlAssetNative(int cookie, const NativeString& fileName)
{
	Asset* a = cookie
		? AssetManager::openNonAsset((void*)cookie, String8(fileName), Asset::ACCESS_BUFFER)
		: AssetManager::openNonAsset(String8(fileName), Asset::ACCESS_BUFFER);

	if (!a)
		return NULL;

	XmlBlock* block = new XmlBlock();
	status_t err = block->setTo(a->getBuffer(true), a->getLength(), true);
	a->close();
	delete a;

	if (err != NO_ERROR)
		return NULL;

	return block;
}

Vector<String8> getNfcAidCategories(AssetManager& assets, String8 xmlPath, bool offHost,
        String8 *outError = NULL)
{
    Asset* aidAsset = assets.openNonAsset(xmlPath, Asset::ACCESS_BUFFER);
    if (aidAsset == NULL) {
        if (outError != NULL) *outError = "xml resource does not exist";
        return Vector<String8>();
    }

    const String8 serviceTagName(offHost ? "offhost-apdu-service" : "host-apdu-service");

    bool withinApduService = false;
    Vector<String8> categories;

    String8 error;
    ResXMLTree tree;
    tree.setTo(aidAsset->getBuffer(true), aidAsset->getLength());

    size_t len;
    int depth = 0;
    ResXMLTree::event_code_t code;
    while ((code=tree.next()) != ResXMLTree::END_DOCUMENT && code != ResXMLTree::BAD_DOCUMENT) {
        if (code == ResXMLTree::END_TAG) {
            depth--;
            const char16_t* ctag16 = tree.getElementName(&len);
            if (ctag16 == NULL) {
                *outError = "failed to get XML element name (bad string pool)";
                return Vector<String8>();
            }
            String8 tag(ctag16);

            if (depth == 0 && tag == serviceTagName) {
                withinApduService = false;
            }

        } else if (code == ResXMLTree::START_TAG) {
            depth++;
            const char16_t* ctag16 = tree.getElementName(&len);
            if (ctag16 == NULL) {
                *outError = "failed to get XML element name (bad string pool)";
                return Vector<String8>();
            }
            String8 tag(ctag16);

            if (depth == 1) {
                if (tag == serviceTagName) {
                    withinApduService = true;
                }
            } else if (depth == 2 && withinApduService) {
                if (tag == "aid-group") {
                    String8 category = AaptXml::getAttribute(tree, CATEGORY_ATTR, &error);
                    if (error != "") {
                        if (outError != NULL) *outError = error;
                        return Vector<String8>();
                    }

                    categories.add(category);
                }
            }
        }
    }
    aidAsset->close();
    return categories;
}