C++ SkBitmap::getConfig方法代码示例

void
SourceSurfaceSkia::DrawTargetWillChange()
{
  if (mDrawTarget) {
    MaybeUnlock();

    mDrawTarget = nullptr;
    SkBitmap temp = mBitmap;
    mBitmap.reset();
    temp.copyTo(&mBitmap, temp.getConfig());
  }
}

bool SkShader::setContext(const SkBitmap& device,
                          const SkPaint& paint,
                          const SkMatrix& matrix) {
    SkASSERT(!this->setContextHasBeenCalled());

    const SkMatrix* m = &matrix;
    SkMatrix        total;

    fDeviceConfig = SkToU8(device.getConfig());
    fPaintAlpha = paint.getAlpha();
    if (this->hasLocalMatrix()) {
        total.setConcat(matrix, this->getLocalMatrix());
        m = &total;
    }
    if (m->invert(&fTotalInverse)) {
        fTotalInverseClass = (uint8_t)ComputeMatrixClass(fTotalInverse);
        SkDEBUGCODE(fInSetContext = true;)
        return true;

bool SkShader::setContext(const SkBitmap& device,
                          const SkPaint& paint,
                          const SkMatrix& matrix) {
    const SkMatrix* m = &matrix;
    SkMatrix        total;

    fDeviceConfig = SkToU8(device.getConfig());
    fPaintAlpha = paint.getAlpha();
    if (fLocalMatrix) {
        total.setConcat(matrix, *fLocalMatrix);
        m = &total;
    }
    if (m->invert(&fTotalInverse)) {
        fTotalInverseClass = (uint8_t)ComputeMatrixClass(fTotalInverse);
        return true;
    }
    return false;
}

bool
SourceSurfaceSkia::InitWithBitmap(const SkBitmap& aBitmap,
                                  SurfaceFormat aFormat,
                                  DrawTargetSkia* aOwner)
{
  mFormat = aFormat;
  mSize = IntSize(aBitmap.width(), aBitmap.height());

  if (aOwner) {
    mBitmap = aBitmap;
    mStride = aBitmap.rowBytes();
    mDrawTarget = aOwner;
    return true;
  } else if (aBitmap.copyTo(&mBitmap, aBitmap.getConfig())) {
    mStride = mBitmap.rowBytes();
    return true;
  }
  return false;
}

/*  Encode bitmaps via CGImageDestination. We setup a DataConsumer which writes
    to our SkWStream. Since we don't reference/own the SkWStream, our consumer
    must only live for the duration of the onEncode() method.
 */
bool SkImageEncoder_CG::onEncode(SkWStream* stream, const SkBitmap& bm,
                                 int quality) {
    // Used for converting a bitmap to 8888.
    const SkBitmap* bmPtr = &bm;
    SkBitmap bitmap8888;

    CFStringRef type;
    switch (fType) {
        case kJPEG_Type:
            type = kUTTypeJPEG;
            break;
        case kPNG_Type:
            // PNG encoding an ARGB_4444 bitmap gives the following errors in GM:
            // <Error>: CGImageDestinationAddImage image could not be converted to destination
            // format.
            // <Error>: CGImageDestinationFinalize image destination does not have enough images
            // So instead we copy to 8888.
            if (bm.getConfig() == SkBitmap::kARGB_4444_Config) {
                bm.copyTo(&bitmap8888, SkBitmap::kARGB_8888_Config);
                bmPtr = &bitmap8888;
            }
            type = kUTTypePNG;
            break;
        default:
            return false;
    }

    CGImageDestinationRef dst = SkStreamToImageDestination(stream, type);
    if (NULL == dst) {
        return false;
    }
    SkAutoTCallVProc<const void, CFRelease> ardst(dst);

    CGImageRef image = SkCreateCGImageRef(*bmPtr);
    if (NULL == image) {
        return false;
    }
    SkAutoTCallVProc<CGImage, CGImageRelease> agimage(image);

    CGImageDestinationAddImage(dst, image, NULL);
    return CGImageDestinationFinalize(dst);
}

void GLUtils::updateTextureWithBitmap(GLuint texture, int x, int y, const SkBitmap& bitmap, GLint filter)
{
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glBindTexture(GL_TEXTURE_2D, texture);
    GLUtils::checkGlError("glBindTexture");
    SkBitmap::Config config = bitmap.getConfig();
    int internalformat = getInternalFormat(config);
    int type = getType(config);
    bitmap.lockPixels();
    glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, bitmap.width(), bitmap.height(),
                    internalformat, type, bitmap.getPixels());
    bitmap.unlockPixels();
    if (GLUtils::checkGlError("glTexSubImage2D")) {
        XLOG("GL ERROR: glTexSubImage2D parameters are : bitmap.width() %d, bitmap.height() %d,"
             " x %d, y %d, internalformat 0x%x, type 0x%x, bitmap.getPixels() %p",
             bitmap.width(), bitmap.height(), x, y, internalformat, type, bitmap.getPixels());
    }
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
}

static bool getColor(const SkBitmap& bitmap, int x, int y, SkColor* c) {
    switch (bitmap.getConfig()) {
        case SkBitmap::kARGB_8888_Config:
            *c = SkUnPreMultiply::PMColorToColor(*bitmap.getAddr32(x, y));
            break;
        case SkBitmap::kRGB_565_Config:
            *c = SkPixel16ToPixel32(*bitmap.getAddr16(x, y));
            break;
        case SkBitmap::kARGB_4444_Config:
            *c = SkUnPreMultiply::PMColorToColor(
                                SkPixel4444ToPixel32(*bitmap.getAddr16(x, y)));
            break;
        case SkBitmap::kIndex8_Config: {
            SkColorTable* ctable = bitmap.getColorTable();
            *c = SkUnPreMultiply::PMColorToColor(
                                            (*ctable)[*bitmap.getAddr8(x, y)]);
            break;
        }
        default:
            return false;
    }
    return true;
}

status_t BootAnimation::initTexture(const Animation::Frame& frame)
{
    //StopWatch watch("blah");

    SkBitmap bitmap;
    SkMemoryStream  stream(frame.map->getDataPtr(), frame.map->getDataLength());
    SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
    if (codec) {
        codec->setDitherImage(false);
        codec->decode(&stream, &bitmap,
                SkBitmap::kARGB_8888_Config,
                SkImageDecoder::kDecodePixels_Mode);
        delete codec;
    }

    // FileMap memory is never released until application exit.
    // Release it now as the texture is already loaded and the memory used for
    // the packed resource can be released.
    frame.map->release();

    // 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 };
    int tw = 1 << (31 - __builtin_clz(w));
    int th = 1 << (31 - __builtin_clz(h));
    if (tw < w) tw <<= 1;
    if (th < h) th <<= 1;

    switch (bitmap.getConfig()) {
        case SkBitmap::kARGB_8888_Config:
            if (tw != w || th != h) {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA,
                        GL_UNSIGNED_BYTE, 0);
                glTexSubImage2D(GL_TEXTURE_2D, 0,
                        0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, p);
            } else {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA,
                        GL_UNSIGNED_BYTE, p);
            }
            break;

        case SkBitmap::kRGB_565_Config:
            if (tw != w || th != h) {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0, GL_RGB,
                        GL_UNSIGNED_SHORT_5_6_5, 0);
                glTexSubImage2D(GL_TEXTURE_2D, 0,
                        0, 0, w, h, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, p);
            } else {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0, GL_RGB,
                        GL_UNSIGNED_SHORT_5_6_5, p);
            }
            break;
        default:
            break;
    }

    glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);

    return NO_ERROR;
}

status_t BootAnimation::initTexture(void* buffer, size_t len)
{
    //StopWatch watch("blah");

    SkBitmap bitmap;
    SkMemoryStream  stream(buffer, len);
    SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
    codec->setDitherImage(false);
    if (codec) {
        codec->decode(&stream, &bitmap,
                SkBitmap::kRGB_565_Config,
                SkImageDecoder::kDecodePixels_Mode);
        delete codec;
    }

    // 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 };
    int tw = 1 << (31 - __builtin_clz(w));
    int th = 1 << (31 - __builtin_clz(h));
    if (tw < w) tw <<= 1;
    if (th < h) th <<= 1;

    switch (bitmap.getConfig()) {
        case SkBitmap::kARGB_8888_Config:
            if (tw != w || th != h) {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA,
                        GL_UNSIGNED_BYTE, 0);
                glTexSubImage2D(GL_TEXTURE_2D, 0,
                        0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, p);
            } else {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA,
                        GL_UNSIGNED_BYTE, p);
            }
            break;

        case SkBitmap::kRGB_565_Config:
            if (tw != w || th != h) {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0, GL_RGB,
                        GL_UNSIGNED_SHORT_5_6_5, 0);
                glTexSubImage2D(GL_TEXTURE_2D, 0,
                        0, 0, w, h, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, p);
            } else {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0, GL_RGB,
                        GL_UNSIGNED_SHORT_5_6_5, p);
            }
            break;
        default:
            break;
    }

    glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);

    return NO_ERROR;
}

// 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.........

// 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;
    int preferSize = 0;
    int postproc = 0;
    int postprocflag = 0;

    SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode;
    SkBitmap::Config prefConfig = SkBitmap::kARGB_8888_Config;
    bool doDither = true;
    bool isMutable = false;
    bool isPurgeable = forcePurgeable ||
                        (allowPurgeable && optionsPurgeable(env, options));
    bool preferQualityOverSpeed = false;
    jobject javaBitmap = NULL;

    if (NULL != options) {
        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);
        postproc = env->GetBooleanField(options, gOptions_postprocFieldID);
        postprocflag = env->GetIntField(options, gOptions_postprocflagFieldID);

        javaBitmap = env->GetObjectField(options, gOptions_bitmapFieldID);
    }

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

    decoder->setSampleSize(sampleSize);
    decoder->setDitherImage(doDither);
    decoder->setPreferQualityOverSpeed(preferQualityOverSpeed);
    decoder->setPreferSize(preferSize);
    decoder->setPostProcFlag((postproc | (postprocflag << 4)));

    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();
    }
    Res_png_9patch      dummy9Patch;

    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 (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, javaBitmap != NULL)) {
        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?
//.........这里部分代码省略.........

SkPDFImage::SkPDFImage(const SkBitmap& bitmap, const SkPaint& paint) {
    SkBitmap::Config config = bitmap.getConfig();

    // TODO(vandebo) Handle alpha and alpha only images correctly.
    SkASSERT(config == SkBitmap::kRGB_565_Config ||
             config == SkBitmap::kARGB_4444_Config ||
             config == SkBitmap::kARGB_8888_Config ||
             config == SkBitmap::kIndex8_Config ||
             config == SkBitmap::kRLE_Index8_Config);

    SkMemoryStream* image_data = extractImageData(bitmap);
    SkAutoUnref image_data_unref(image_data);
    fStream = new SkPDFStream(image_data);
    fStream->unref();  // SkRefPtr and new both took a reference.

    SkRefPtr<SkPDFName> typeValue = new SkPDFName("XObject");
    typeValue->unref();  // SkRefPtr and new both took a reference.
    insert("Type", typeValue.get());

    SkRefPtr<SkPDFName> subTypeValue = new SkPDFName("Image");
    subTypeValue->unref();  // SkRefPtr and new both took a reference.
    insert("Subtype", subTypeValue.get());

    SkRefPtr<SkPDFInt> widthValue = new SkPDFInt(bitmap.width());
    widthValue->unref();  // SkRefPtr and new both took a reference.
    insert("Width", widthValue.get());

    SkRefPtr<SkPDFInt> heightValue = new SkPDFInt(bitmap.height());
    heightValue->unref();  // SkRefPtr and new both took a reference.
    insert("Height", heightValue.get());

    // if (!image mask) {
    SkRefPtr<SkPDFObject> colorSpaceValue;
    if (config == SkBitmap::kIndex8_Config ||
        config == SkBitmap::kRLE_Index8_Config) {
        colorSpaceValue = makeIndexedColorSpace(bitmap.getColorTable());
    } else {
        colorSpaceValue = new SkPDFName("DeviceRGB");
    }
    colorSpaceValue->unref();  // SkRefPtr and new both took a reference.
    insert("ColorSpace", colorSpaceValue.get());
    // }

    int bitsPerComp = bitmap.bytesPerPixel() * 2;
    if (bitsPerComp == 0) {
        SkASSERT(config == SkBitmap::kA1_Config);
        bitsPerComp = 1;
    } else if (bitsPerComp == 2 ||
               (bitsPerComp == 4 && config == SkBitmap::kRGB_565_Config)) {
        bitsPerComp = 8;
    }
    SkRefPtr<SkPDFInt> bitsPerCompValue = new SkPDFInt(bitsPerComp);
    bitsPerCompValue->unref();  // SkRefPtr and new both took a reference.
    insert("BitsPerComponent", bitsPerCompValue.get());

    if (config == SkBitmap::kRGB_565_Config) {
        SkRefPtr<SkPDFInt> zeroVal = new SkPDFInt(0);
        zeroVal->unref();  // SkRefPtr and new both took a reference.
        SkRefPtr<SkPDFScalar> scale5Val = new SkPDFScalar(8.2258);  // 255/2^5-1
        scale5Val->unref();  // SkRefPtr and new both took a reference.
        SkRefPtr<SkPDFScalar> scale6Val = new SkPDFScalar(4.0476);  // 255/2^6-1
        scale6Val->unref();  // SkRefPtr and new both took a reference.
        SkRefPtr<SkPDFArray> decodeValue = new SkPDFArray();
        decodeValue->unref();  // SkRefPtr and new both took a reference.
        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());
    }
}